SCIENTIFIC ABSTRACT PEKAREK, L. - PEKAREVA, T. I.

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• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001239820016-9
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 15, 2000
• Sequence Number: 16
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

AUTHOR Pekarek, Luj)k CZECH/37-58-6-6/30
TITINI Gradual Formation of Layers in a Glow Dischar In
,. je
Hydrogen (Postupny vznik vrstev v doutnavem boji ve
vodiku)
PERIODIO'AL: C'eskoslovensk$ Gasopis Pro Fysiku, 1958, iir 6,
pp 661 - 664 + 1/2 plate (Czech)
ABSTRACT: In earlier work (Refs 1,2) the author of this paper
investigated the formation of moving layers in a discharge
by the method of artificially produced transient processes
lm~ indirt'- gages only. The layering wave, which is the
fundamental process in the successive formation of layers
in such cases, was characterised by the feature that the
individual layers moved from the anode to the cathode,
whilst the formation of theselayers proceeded in the
opposite direction. This property of the layering wave
in inert gases was taken into consideration when formu-
lating the phenomenonological theory (Ref 3).
B.N. Klarfeld (Ref 4) observed layers moving in an
opposite direction (i.e. from the cathode to the anode)
in a hydrogen discharge at a gas pressure of 1 mmHg. The
question of how these layers form in the plasma of the
Cardl/4 positive column has so far not been solved. Solution of

CZECH/3r-58-6-ro/30
Gradual Formation of Layers in a Glow Discharge in Ilydrogen
this problem is of importance not only from the point of
view of determining the range of validity of the
phenomenological theory of the gradual formation of
moving layers but also for determining to what extent the
moving layers in discharges in inert gases are the same
or differeiit Vom the moving layers in molecular gases.
In this paper, the results are described of experimental
investigation of the processbf gradual formation of
layers moving from the carnode to the anode in a glow
discharge in hydrogen,by means of a transient process
artificially created in the positive colilmn. In his
experiments, the author uses a tube with an internal
,,diameter of 2.2 cm~length of 60 cm, with molybdenum
roller~'electrodes- The tube was filled with pure hydi~ogen
by diffusion through a palladium tube. The gas pressure
was measured by means of a MacLeod pressure gauge; the
mercury vapours were frozen out by liquid nitrogen. The
moving layers were observed by means of two photo-
multipliers and an oscillograpb by means of a method
described by Donahue and Dieke, Physical Review, 1951,
Nr 81, p 248. The surge disturbances intended for bringing
Card2/4 about a transient process in the discharge was effected by

CZECH/3?-58-6-6/30
Gradual Formation of Layers in a Glow D'scha-rge in Hydrogen
feeding pulses of' about 1 4sec duration to the external
electrode which was -olaced near the cathode, whereby it
was possible to vary the voltage and to obtain a low
repetition frequency. The same pulses were used for
triggering-off the time base of the surge oscillograph
(Ref 6). It was possible to de t e c t a relatively
wide range without stationary layers at gas pressures of
about 3 mmHg and currents from a few mA to several tens
of m.A. Observation of the positive discharge column in
the photo-multiplier proved that moving layers exist in
this range of pressures and currents, although in
observations by the naked eye the positive column appeared
homogeneous. Figure 2 (plate3 ahows the oscillogram of
the transient process of the change in the illumination
intensity in the positive column produced by an external
impulse. It can be seen from the 'diagram, Figure 3, p 662,
that the pulse produces in the positive column of the
hydrogen discharge a transient process which is fully
similar to the layering wave inside inert gases; in the
same way as in inert gases, the layering is in the
Card3/4 direction from the cathode to the anode. The spatial
period X was determined at 0.62 cm. It follows from the

CZECH/37-5t-b-ro/30
Gradual Formation of Layers in a Glow Discharge in Fydrogen
results of the work described in this paper that during
the formation of moving waves in hydrogen, the layering
wave is a fundamental process. This proves that the
layering wave is a very generalised phenomenon in dis-
charges not only for layers which move from the anode to
the cathode in inert gases but also for layers which
move from the cathode to the anode and it istherefore,
obviously a fundamental theoretical problem of the micro
processes in the plasma of the positive column. So far,
the phenom(enological theory of the layering wave
published earlier by the author of this paper (Ref 3) is
applicable without any changes to the formation of layers
!A in hydrogen. There are 3 figures and 6 references,
1 of which is Soviet, 1 English and 4 Czech.
# I I
-ASSOCIATION: Fysikalni ustav. &AV, Praha (Physics Institute of
the Czech Ac.Sc., Prague)
SUBMITTED: April 14, 1958
Card 4/4

AUTHOR: Pekarek$ LmpiK CZECH/3?-58-6-//30
TITIR: ion of the Theory of the Gradual
Experimental Veri
Formation of Layers in.jlow Discharges (Experimentglni
ovg~enl teorie postl1pne o vzniku vrstev v doutnavdm
vjboji)
PERIODICAL: C'eskoslovenskJ Casopis Pro Fysiku, 1958, Nr 6,
pp 665 - 673 + 1 112 plates (Czech)
ABSTRACT: Watanabe and Oleson (Ref 1) and Robertson (Ref 2) have
published theoretical work relating to the problem of
moving la~Fers inside glow discharges. They interpret the
moving waves as sinusoidal waves which propagate with the
plasma at a certain phase speed having a wavelength equal
to the spatial period of the waves. However, earlier
results of the author of this paper (Ref 3) have shown
that the fundamental phenomenon in the formation of these
waves has a transient process which the author of this
paper refers to as "the layering wave". Later on.(Ref 4),
the author presented a phenomenological theory from
which certain quantitative relations could be derived
for the parameters of the layering waves as a function
of the distance fron the point where the wave occurs.
Cardl/6 Experimental facts known from earlier work on transient

CZECH/-)'/-58-O'--V3C
Experimental Verification of the Theory of the Gradual Formation
of Layers in Glow Discharges
processes during the formation of moving waves are in
good agreeuent with the results of this theory but they
do not permit determining definitely whether this theory
gives quantitatively accurate results for all the
properties of the layering wave. This is due to the fact
that certain relations derived from the theory have not
been determined experimentally at all. Therefore, in
the work described in this paper, the author measured
the parameters of the layering waves in a glow discharge
in neon for the purpose of verifying directly the
results of his phenomenonological theory. The measured
results are described and the results are compared with
theoretical results. The measurements were carried out
with discharge tubes filled with pure neon. The shapes
of these were the same as those described in earlier work
(Refs 3-5). An electrode placed at the side of the tube
aerved as a cathode. The tubes were evacuated to a
higher vacuum and the gases were removed by heating under
vacuum; after filling the tubes with neon, they were
sealed. The gas pressure was measured with a MacLeod
Card2/6 pressure gauge; the mercury vapours were removed by

CZECH/32-58-6-V30
Experimental Verification of the Theory of the Gradual Formation
of Layers in Glow Discharges
freezing out. Figure 1, p 660', gives a schematic
diagram of the apparatus used for exciting and oscillo-
graphic observation of.the layering waves in the positive
column; the apparatus is a modification of that used
in earliw work (Ref 3). The discharge current was con-
trolled by a pentode, the grid voltage of which waE varied
by means of a potentiometer. From a surge generatcr,
voltage surges with amplitudes between 0 and 4 kV of 1 4sec
duration were fed to the external ring electrode.
Thereby, the equilibrium conditions in the discharge were
disturbed for a short time and this produced a layering
wave in the plasma of the positive column. The external
electrode could be displaced along the discharge tube.
The oscillations of the light intensity caused by the
movement of the layers in the positive discharge colilmn
were recorded by ~xvo photo-multipliers F1 and F 2 *
The light beam incident omk4*he photo-cathode was limited by
0-5 mm wide slots which were normal to the discharge axis,
so that the photo cathode r"eiv6d, - light emanating from
Card3/6 a na row strip of the positive beam. The voltage produced

CZECH/3`/-56-6-'//30
Experimental V,~rification of the Theory of the Gradual Formation
of Layers in -'.-Low Discharges
by the change in the current intensity of the photo-multi-
plier was fed through a cathode follower (Iol I Ld to
a wide-band amplifier and the output of the amplifier was
fed onto a commutator. From the commutator, signals were
received alternately from the two multipliers which were
fed into the surge OBCillograph. The time base was
started by the same surge generator. The time markings
enabled accurate measurement of the time intervals on the
oscillograph curves. The amplifier, the cathode follower
and the load resistances in the anodes Of the photo-
mulzipliers were so designed that the investigated
transient processes were not distorted. Both photo-
multipliers could boa slid in the direction of the axis
of the discharge tube. Their position was determined on
a scale with an accuracy of + 0.1 mm. One of the photo-
multipliers could be slid automatically by means of a
motor. The oscillograph of Figure 2 (plate) provides
direct experimental proof of the existence of fast and
slow layering waves predicted theoretically (Ref 4).
Card4/6 The oscillograms of Figure 3 (plate) confirm that the

CZECH/37-58-6-r//30
Experimental Verification of the Theory of the Gradual Formation
of Layern in Glow Discharges
parameters of the wave are independent of the amplitude of
the external disturbance. It was found that the layering
wave is an odd effect. Other features of the theory have
also been confirmed. The author summarises his conclusions
thus: good agreement of the measured results with the
results derived from the phenomenological theory of the
gradual formation of the layers justifies the conclusion
that this theory describes correctly the properties of tie
layering wave. This permits systematic study of micro-
physical processes which determine the relaxation time
and characterise successive formation of the layers.
Such measurements can be of importance not only for
elucidating the micro-physical nature of the layers in
the positive discharge column but also as a method of
measuring the speed of certain processes in the plasma,
for instance, speed of decay of atoms in metastable states,
ion diVrusion, etc. For this to be possible, it is
necessary first to ascertain in each concrete case what
physical process determines the relaxation time of the
Card5/6 layering wave. Acknowledgments are made to M. NovAk for

CZECH/3?-58-6-7/30
Experimental Verification of the Theory of the Gradual Formation
of Layers in Glow Discharges
his assistance in measurements and evaluation of the
experimental results and to F. Kroupa and V. Krej6f for
commenting on the manuscript. There are 8 figures,
1 table and ? references, 2 of which are English and
5 Czech.
ASSOCIATION: Fysika'lnl' ustav CSAV, Praha (Physics Institute of
the Czech Ac.Sc., Prague)
SUBMITTED: May 19, 1958
Card 6/6

AUTHOR: Pek' ek, Lupk CZECH/37-58-6-18/30
ar
I : , ~-~ -
T
TLE Influence of External Illumination o* Moving Layers in
Dischar vne
es Inside Neon (Vliv 'j9iho osvgtlenf na
pohybujfci Be vratvy ve vjboji neonu)
# 0
PMODICA,L: O'eskoslovensk7 Casopis Pro Fysiku, 1958, Nr 6,
.1 PP 735 - 736 t I plate (Czech)
ABSTRACT:-The author investigated experimentally the changes of
.the parameters of slow and of fast layering waves in
the noon discharge okused by illumination with aU& of the
spectral composition. The arrangement for illuminating
the discharge was similar to that used by Meissner and
Miller (Ref 1) for determining the changes of the
electrical gradient after illumination. As a source of
intensive light, a discharje tube with a heated cathode
was used (1 cm dia., filled with neon of a pressure of
23 mmHg). The current of the illuminating discharge tube
was 0.8 - 1 A. In Figure 1( plate) oscillograms are
reproduced of slow layering waves obtained simultaneously
from two photo-multi~liers; oscillograms are reproduced
which were obtained n the absence of external
illumination and for the case of simultaneous illumination
Cardl/2 by meam of an external source. A drop in the oscillation

CZECIIDSLO'lj'iKIjl/'Eloctronics - Eloctrical DischarSos in Gascs ane H-7
Gas Dischargo Apparatus.
Abs Jaur s 11of 2hur - Fizikaj No 12, 19589 No 28026
Autho r :301M
Inst : Physics Instituto, Czochoolovvk Acndony of Scioncos,
Praguo, Czochoslovakia
Titlo :Factors Affocting tho Solf-Zxcitation of Low Froquoncy
Oscillations in an Eloctrid Dipchnrgo
Orig Pub :Coskosl. casope fys,, 19558, 8, No l) 35-45
Abstract :Using as an oxanplo tho glow disclutrgo In noon, an ox-
porimontal invontigation has boon nmdo of tho faotors that
indluonco tho, solf-oxcitation of low froquoncy oscillations,
connoctod with tho nppoaranec of noving striations in a
L,as-dischar- plas:-z (soo Roforat Zhur Fizika, 1956, No 6,
17264 and 1957, No 4, 9804). Such factors aro tho followinr:
tho tondoncy of tho plaana to striation, tho Ion,-th of tho
dischargc Zap, tho proccssos at tho oloctrodoe, and tho
paranotors Orf tho oxtornal oloctric circuits. Tho nost
Card 1 1/2
45

CZE('HOSLOV,'JCL'L/Elect:,oi,,ico - Eloctrical i.,. Gnsc-,;
Gas Aprarat j.
Abs Jour Ref Z~i,-x - Fizika, 117 7, 195~, 15)3'--
Author Pckar(~~ Ludek
Inst
Title )f V'L, W-1ve
Positivc Col-~.ii, :)f i., Electric Discha~-,r,e.
Orie, 11~ib a-ekho,,I-. i'.'z. :-', ., 1958, 8, rl-, 4, b-?8.-4c)q
Abst--act Sec Eef Z'-.~zr Fizika, 19~9, N- '), 11109.
Card 1/1

U&MM".-
SCMCE
Pericdicals: CESKOSLOVFNSKY rASOPM PRO FYSIKU. Vol. 8, no, 5, 1958
FEKAREK, L. Experimental test of the theory of successive production of
striations in a glow discharge. p. 665.
Monthly List of East European Accessions (EEAI) LC, Vol. 81, No. 5P
May 1959, Unclass.

XEMLEK. L.
SCMICE
Periodicals: CESKOSLOMISK( CASOPIS PRO FYSIKU. Vol. 8, no. 6, 1958
PEKAHEK,L. Successive production of striations in a gl6w-discharge ih
IWdrogen. p. 661.
Monthly List of East European Accessions (EEAI) LC,Vol, h, No. 5,
May 1959, UnclAss.

14
CZEC,'TCSLON'.*JU,'L/Electr-,,iies - Electrical Iisc'.ar_os ii Gases a
Gas lliscl,ar-,c A!),,a-ntus.
j,ur Ref -7L.ur Fizika, N-, i, l9oC, 1533
Aut-~ Feluirok, LuOek
Inst
Title TI.e S-iccessive n--~Oucti .i .)f Striati,),. i., ~i G~ w
Ciek~ s1. fiz. z;.. 3, 11, 6, 6)S,-7,,,4
':..~stract Soe 'I'Dstruct 11)31.
car" 1/1
- 82 -

CZEMCGLOVAKIA/Electroi,ics - Electrical Discharges ii, Gases and If
Ga~-, tpparatuo
Abs Jour Ref Zhur Fizika, No 12, 1959, 27886
Author Pokarek, Luduk
Inst
Title The Piftuence of External Illumination on Moving
Striations in a Discharge i,-, Neon
Orig Pub Chokhosi. fiz. zh. 1958, 3, No 6, -,142-744
Abstract See Abstrac~.
Card 1/1

PHASE I BOOK EXPLOITATION CZECH/566-~
PekArek, Lude%k
Termonukle~rnl-e--nergie (Thermonuclear Energy) Prague, Orbis, 1959.
194 p. 'Series: MalA moderni encyklopedie, av. 13) 17,000
copies printed.
Sponsoring A&qncy: deskoslovenska' spolednost pro 91~enf politic4cl,
a v6deck~ch znalosti.
Ed.: Vladimir 5I.Inka, Engineer; Resp. Ed.: fta Bflkov&.
PURPOSE: This book Is intended for the general reader interested
in the field of Controlled thermonuclear reactions and prospects
for its continued divelopment.
COVERAGE: The author pres3nts in simple terms the nuclear theory
at the base of the development of the atom and the hydrogen boinbs,
and discusses the theoretical and experimental work baing done
on controlled thermonuclear reactions with a view to acquiring a
Card -1/6-

V
Thermonuclear Energy
CZECH/5663
new and inexhaustible source of energy. The text is Illustrated
with 31 diagrams and graphs and 8 photos. No personalities are
mentioned. There are 12 references: 3 Sovietp 3 English, 1
French, and 5 Cizeoh.
TAKE OF CONTENTS:
1. Do We Require, New Sour-ces of Energy?
Man -and energy
Physical capability of man
Coal and petroleum
Water power
The classical Sour-%es of energy are not enough
Tidal energy
Direat utilization of solar energy 17
Nuclear energy of uranium and thorium 1-9
Is it economical to construct uranium electric power plants? 21
The problem ol' radioactive wastes 23
A new prospect: nuclear fusion 24
Card 2/6

CZECH/37-59-3-23/29
AUTHORS: PekArek, Lud6k and Novi9k, Milos'
TITLE: A New Type of Moving Striations in Neon (Letter to Editor)
PERIODICAL: teskoslovensky' C"'asopiB pro fysiku. 1959, Nr 3, pp 327-328
ABSTRACT: Evidence for a third type of movingstriation in neon is
shown in Figure l(P 338a). The slow wave is marked p
the previously described (Ref 1) fast one r and the new
fast wave is s . The anode current was 3.6 mA, the
discharge tube 300 mm long, 11 mm diameter, neon pressure
2.0 mm Hg (see also the work of L. Pekdrek - Refs 2,3).
With increasing current (between 2.1 and 3.2 mA)- the
velocity of the striations decreaseB. The striations B
are probably related to molecular ions (M.A. Biondi and
L.M. Chanin - Ref 4). There are 1 figure, I table and
4 references, of which 3 are Czech and 1 English.
ASSOCIATION: Fysikglnll Astav 6SAV, Praha (Physics Institute of
the Czechoslovak Ac.Sc., Prague)
SUBMITTED: December 17, 1958
Card 1/1

CZE',IIOSLOVAKIA/Radio Phyrsics - Application of Radiophysical Methods. I
Abs J~)ur : Ref 72iu~7 Fizika, No 12, 1959, 2a213
Auth:)r : Pekarek,-.,Lud.ex.-
L~st I - -1--
Titic, : Radio Spectroscopy -- New Field of Modern F1,,ysics
Ori 6, Pub : Pokroky i:iat., fYs- a astro-1., 1959, 4, No 2, 162-
1,9
Abstract : Sul-vLy article.
Card 1/1

I
I
I
I
I.
V.
I
. I Ii
. , v .
. V
.1
I

A.
A rA!f of Moving striatiolul In
i"4 119, (Czech. AcAd. Scl.!r4-*
e.
J. Y:. 9, 1-20969XIn Gtrinan).-Three t)lx!s of
ptriation waves (stratification) are observed. They an
desiSnated z,r,p. It appears l1kely that the newly dis-
covered, last-movins s striation waves am related w the
Y presenceotnu)LIons. 'neapp. is described lnibid.4,211
(1951)and -A.53,_15-ii A. Krembtller--

J
VP41crophysical phenoment causing the creation of fag'
Stratification waves in a 500CL
glow dischMe.11AWIt
,
Pckirrk and Nfilca Novmr (Caechuslov. Amd. w., Frague).
mz~. -r -Pkis- .9. e4I-5I(I959Xin Gerwan).-The
authon inrestitate ;xpd. ancl theoretically the effect of-
apace charge and ion diffuske. The relwtatiDn t; of the
last waves are dependent on the diffusion lifetime of at.-I
"r and TOOL ions. Krembellat-4

U

CZ,E~:lC')SLOV.'JM,/Floctr. ics - Eiectrical rldsc.ar ,s i Gases a
Gis Disc".ar es i'l,--,,-.rata9-
1534
s j ~ur Rof Zilur Fizlka, N- 1, 1~60,
,',uth r rckarck, Lz,.I.ek
I:,s-
Ex* Verificati -,f t".e T'.c: ry f t:.
Succ,.~ssivc Pr,jOucti .. -,f Striati:~,,s i- a GI
Disc.,:ar 0
Cri Pu'- )sl. fiz. z:,.., 1,959 1,J) 1,
Sc2 ','-3tract !A2.
card 1/1

SOV/48- 2 3- 8- 24/25
Low-frequency Wavelike Phenomena in the Plasma of Glow Discharge
seen from oacillograms, perturbation expands throuchout the
discharge tube in the form of momentary variation of the
luminous power. Velocity is 1,400 M/sec, and relaxation time
amounts to 5(V sec. There are 3 figures and 3 Soviet references.
Card 212

z/0-Wbo/000/005/001/056
AUTHIM: PekXr,.*, L.
TITLE., Ionization. Phenomena in Ga4-,es
PERIODICAL. Ceskaslovenskj oBopi's pro fy-liku, 1960,
No. 5,, P, 379
TEXT: During the Iast few years the ionization phenewta~, z-n
gasea have been atudi.ed very extensivel.y. This i~ duc- to th~
f act that varfous attoLimpt.4 have been made t o r eal 0i F - ~.~nt F o I 1 1'.1
thermonuclear reaQtion-4. In Czeclkoslovahia the fc11c-w1n.S
problems have been sfudle,d..,
1) the fundamental. processes in ele~.~Irieal disrharees!;
2) very high temperature p1asmas which c-oul.d be prr-duci-d and
maintained im a conflned epace (pract3(-.al atcempt6 Ic obtain
taGxions);
5tability and cs~:~Ilatiori.s and
3) the problems"
waves in plasmas4
4) interaction between ar, electrif.al d2ivharge and the
of ---ertaln Bubstances,
5) some theoretical problems and
6) applizat ions.
ASSOCIATION: Fyslk~,Inf ~tstav CSAV, Prah,-k (Phy-31 fIns t it w
0 f t 11 t~ CS rV

4o.;55
15/194/62/000/-'06/184/232
D201/D308
AUTHORS: Peka'rekp L., and-Krpata, V.
TITLE: Time dependent changes in the velocity and length of
striations in a hydrogen discharge stratification %,.,ave
PE'.RIODI:Cl--.L; Re"erativnyy zhurnal. Avtomatika i radioelektronilca,
no 6, 1962, 56-57, abstract 6Zh368, (Chekhoel. fiz.
zh:, 1961, B. 11, no. 1, 849-851)
TEXT: Using a photomultiplier and an oscilloscope, the changes of
U
the radiation intensIty from the positive column of a discharge in
H. at different distances from the cathode were recorded. The dis-
charge currcnt Was 1.8 mAp the hydrogen pressure 2.2 = Hg, the dia-
meter of the discharge tube 20 mm and its length 300 mm. 1, short
aperiodic pulse was produced at the cathode end of the discharge
column. l.,easurement8 have shown that the direction of propa-ation
of the resulting striations coincides with the direction of their
propagation during the discharge in inert gases. The velocity of
propagation of individual striations decrea8e.s with time. Thus, for
Card 1/2

S/058/62JO00/004/145/160
AO61/A10l
AUTHORS: Pekhrek, L., 1(rej6i, V.
TITLE: The physical nature of the production of moving striations in a
d-c discharge plasma
PERIODICAL: Referativnyy zhurnal, Fizika, no. 4, 1962, 59 - 60, abstract 4Zh4O6
("Chekhosl. fiz. zh.11, 1961, v. B11, no. 10, 729 - 742, English)
TEXT: A mechanism of the lamination of a positive d-c cobimn is suggested
and physically interpreted on the basis of a greatly simplified system of equa-
tions, whose solution describes the production of a periodic structure of the
plasma of a positive column after an aperiodic disturbance. Only three principal
physical phenomena, taking place in the plasma of any d-c discharge, were con-
sidered: 1) dependence of ionization on the electron temperature, and, conse -
quently, on the electric field; 2) formation of space charges as the result of
different ion and electron diffusion rates; 3) production of additional elec-
tric fields due to the appearance of space charges. The foregoing processes as
a whole give rise to a characteristic cirouit, developing in time and spaco, and,
Card 1/2

PFJWLEKS_,L.j..M.TCI.T V.; STIR6V, 0.
1- -, I
Direction of motion of striations in an inert gas-hydraggen
mixture. ChekhoBI fiz zhurnal 13 no.4:243-245 163.
1, Fyzikalni ustavp Ceskoslovenska akademie vedp Praha*

'.;~L _kz. v.-
T~Tp AT
'ACC Nit'. AP60CM7. S=CE CODI: CZ/DD55/65j0l5/D09/06h4/D6fi1
AUTHOR: kekfia~ekj L. Hasek, K.
ORG: lliStItUte'of Physics, Czechoslovak Acadiny of Sciences', Fragpe
;z/'
TITLE., Macrovo6pic, sp-ace charge field In distrubed qusaineutral plasma-
SOURCE:. 'Chekbon2ovatokiy A-Pizicheskly zburnal, Y. 15, no. 9, 1965, 04-661.
TOPIC TAGS: electron plasma, plasma magnetic field, homogeneous nagnetic field,
magnetiti field intensity, ion density, perturbation, Gaussian distribution
ABSTRACT: A metboa of calculating the electric field intensity it) a quasi-
neutrAl plasma homogeneity is found for the case vben the problem can have a one-
dimensional formilation. The general formla
E J6 - 498T dal
C)# Qj
vbere
Cj*1
ez + el
inrluding Ohm's lav, ambipolar approximation, and bigber approximstioDs of the
space-charge electric field inten.,3ity expressed in terms of deviation nt in ion
t Card 21'2 JAO.,

ACCESSUR IM: AP4033423 Z/0055/64/014/004/(),%7/0255
AUMORt Slab&# It.; Vesely., V-; Novak# Ja; Pokereks L.
=11IS: DeUradnation of the relaxation time of the electron temperature in
the positive columnof the electric discharge
SOMM CbekhoslovatskLy fizichiskiy zhurml, v. 14, no. 4, 1A, '247-255
~.TOPIC MM rel=tim time,, electron temperature, electric discharge,
electron density., positive column
MSTRAM: A method of measuring the relaxation time of the tempeipture of
e3metrcas in the positive coluza of an electric discharge is descAbed. The
method uses measurements of the phase shift between the course of the electron
temperature and that of the ccncentratim of electrons in artificially excited
mo-4nz striations of small amplitude, These data an& the values measured for
the electric field and temperature of the electrcas in a hmoLeneouB colt= are
use& to calculate the relaxation time of the electron temperature cn the ass%=;-
t1oa that the diiTusioa of -the electron temperature has no substantial Influence
cr. th* time* The authors conolude that their results indicate that theoretical
Card 1/2

ACCMSICK M: AF4033425
mastery of the layer phenomena In the positive column plasma has alreae~y opened
new possibi.Uties in plasma diagnostics. Orig. art, has: 10 fornuIzz and 3
tables
Assoo:rATIal: rAhratuhl fur 131ektronik und Vukumpb~ysik der Karlsuniversitact,
Pra"(Chair ceRlectron1co and Vacm= Physics., Charles University); Phlmikalisches
In-.titub der TschechosI. 4.W , Pr4e,42*-slos Institute., Czecb * Acad(my of
Scienees)
sw2r=: WiovO
GP
SUB CODE:
D= =: OD%A ENCL: 00
NO WN SCV-. 002 TRT R: 013.
Cwd. 2/2

S-10A, M.; VESELY, V.; NOVAK, J.; PEKAREK, L.
Determination of t'ne relaxation time of electron te-3pera-
ture Jn the positive column of an electric diBeharge.
Cheskhosl fiz zburnal 14 no.4:247-255 164.
1. Chair of Electr3nics and VRcuum Physics, Charles Uni-
versity, Prague 2, Ke Karlovu 5 (for all except Pekarek).
2. Institute of Physics, Czechoslovak Academy of Sciences,
Prague 8, Lumumbova I (for Pekarek).

LO; VTGI~ V.
- _!R,
The theory of movhig striationo in a D-C diseharge
Pt.2, Chekboal fiz zhi-irnal 13 no.12".8+-891j. t63.
1. Flyzikalni ustar, Ceskoslu~rczioka ak-adamie ved,

PEKAREK, L.; KREJCI, V.
Analogy between the stratification vave in plasma and waves on
water. Ce cas fyi; 12 no.5/6:546-552 162.
1. Fysikalni ustav, Ceskoslovenska akademle vedf Praha.

45267
Z/037/62/000/005-6/ov/09
E192/E382
-2
AUTHORS: e~q~l jjxcl~~, L._ and Krej~i,. V.
TITLE: Analogy between a stratified plasma wave and the t-raves
on the surface of water
PERIODICAL: Ce*lcoslovenslky casopis pro fysiku, no. 5-6, 1962,
546 - 552
T EXT: The process of wave-formation on a smooth water surface
is well knoum, whereas a similar process of the appearance of
mobile layers, knoini ar, "stratification.waves", in a gas discharge
is a comparatively unknoiirn phenomenon. Such waves in gas dis-
charges can be produced, for instance, by applying an ajxriodic~mltage
Pulse to an electrode situated in the discharge tube. This
pulse pruduces an initial stratum which rapidly disappears but
result-- in the foriiiation of a siaiilar stratum at a cortain distance
in the direction of the anocle. In turn, after a delay, another
stratum is produced and so on; a set of strata which moves towards
the anode is observed only after several ms,-'whereas the individual
strata move in the opposite direction. The tl~aory of gravitation
waves on the surface of viater can be approximately described by the
Card 1/4

Analogy between ....
Z/037/62/000/005-6/ol7/049
L192/E382
following basic equations:
+ + 0
TX by- Oz-
-2
0 Y 0 y
+ g - = 0
2 6Z
7
%-rhere 9 is the velocity potential, x and y are horizontal
coordinates, z is tile vertical coordinate, t is time and g
is the gravity. The stratification waves in inert gases can
similarly be described by a system of partial 4ifferential equationa
be/ax It i-q0n+ (5)
an lbt z'N0e (6)
Card 2/4

Z/037/626/000/005-6/017/049
Analogy botwean E192/E382
'wh er c(! is the local deviation of the electric field from its
equilibrium value, n is the deviation of the ion concentration
from thc! cquilibriuui V+aluc No I q is an elementary charge, zo
is a constant relatinj~ the ionizatolon intensity to tile clectric-
field strength 0 and x is the distance from the position of
the initial perturbaLion oi' Li-ie cquilibrit~-.i state. Eqs. (5) and
(6) arc valid for deviations and take*into account the three basic
processes in plasma: 1) dependence of the ionization rate on the
electron tunperaturc, the teiaporature being directly proportional
to the field; _' )production of space charges by differ.,Lng electron..
and ion-diffusion rates and 3) appearance of an additional
electric field due to the space charge. The solution of Eqs. (5)
and (6) is approximately given by:
n (x < 0, t J a V - xt
+ 0
1
Cos [a
xt) xt)
Card 3A

4/037/62/000/005-6/017/049
Analogy botween .... E' 192/ E38 2
whero a = V/(4rrq ~i Comparison of the theory of strati-
0 + f~150q with the tneory of tho gravitation
fication waves in Iner ,
waves on irater shows thaL although the two effects are very
similar, -the difference:3 betwertn them are primarily due to the
different modes of propagation of the perturbations (from the
equilibrilun state); whereas in waves on wator the contact forces
Are the most important, the electrical phenomena in plasma are
such as tc. act either directly or remotely. In this respect, the
moving strata differ fron, the uraves on water and have no direct
analogy in mechanical systems. There are 3 figures.
ASSOCIATION: Fysikalni ustav 6SAV, Praha
(Physics Institute, CS~-V, Prague)
Card 4/1,

NEW.CEK, Jiri; PEFAIM, Potr
Contribution to the kiceticii ani mechanlsm of
of iron sulphates. r:hau, pri.;.-a 15 no.3:132-13" fPr-
1. Rr--se&rch Instiltats cf Inorganic Chemistry, Ustl- mid *,.aben,

PE-KAREK, Robert., inz.
Use of slurries in fertilizer plants. Vodni hosp 14 no-4:
153-156 $64.
1. Ministry of Agriculture, Forestry and Water Resources
Management.

FEWEI, Robert
Prefabricated biological filters, Vodni hoop 13 no.2:53-55
163..-
1. Ministerstvo zemedeletvi, lesniho a vodniho hospodarstvi.

PEW!~~ ~V.
OTr~nsuranium elepants" by AA. Lawruchina [Lavrukbina., A..K.),
J.A -. Solotov [Zolotov, Yu.A.I. Reviewed by V. Fekarak. Jaderna
energie 9 no.3:108 Mr 163.

Psumm, V.
*.,'~ --,- - ~,
Air pollution in Most-Usti soft coal district. Pracovni lek. 4 no-5:
339-345 Oct 1952- (CLML 23:4)
1. rtf the Institute of Industrial Medicine (Head-V. Pe)mre)c, X.P. ),
Usti/labe.

I
yzxAaK, V. -RA.j
"HiMpS Ores of Nonferrous HstaIx.!7-p _25, Vol. 2. no. 2. Peb. 1954, Praha.
S;D: Iket Daropesm Accessions List, Vol. 3, No. 9. September 1954, Lib. of Ocingress

Ij_ . 17 Vol. 3/6 Public 'Realth Jun
EXCERPTA YEDICA Sec. 57
1918. PEKAREK ~Risiko silikosv pfi d6ravftf skla tryskdnIm pfsku Hazard
-UT-31-ri-cosis durinR sandblasting of holes in glass PRACOV-
NI L9KARSTVI (Praha) 1956, 8;4 (294-296) Illus.1
The working process and apparatus for cutting holes into glass by blasting of dry
quartz dust of fine granulation is described. During the preparation of the sand
and d%iring blasting, high values of silica in the atmosphere of the workshop were
meas-ared, the workers were thereby seriously exposed to the hazard of silicosis.
(XVII, 15)

C- V- c
CZECHM-LOVIJM/Chemical TechnolojQr - Chemical Products and 11-6
Their Application. Safety En~,,ineeriiig. Sanitary
EnqincerinG.
Abs Jour Ref Zhur - Khirdya, No 3, 1958, 8517
Author Pekarck Vladimir, Ponca Euzen, Iizera Menek
Inst
Title Workshop Atmosphere and Health of Workers in the Pr,)-'uc-
tion of Peimanoanate.
OriLl Put) Pracovni. lekar., 1957, 9, No 2, lo4-i-u
Abstract At a perrnr-L~anate m-iufacturing plant the hif-,hQst ccncen-
tration of Mn, ii, the atmsphere, was found in the clepart-
ment where the finished product is packaged (17.84 ~5/li-
ter, 95% of particleo less than 1 ).k ). A maximum perLde-
sible concentration of Mn has not been set by Czechoslovak
standar~'Is- 54 plant workurs, enployea for periods froin 5
months to 36 years, were exr-irdned. Pneumonia rLcur('-(-,('. in
11.1% of cases, bronchitis in 16.6%, 9.6% of cases
Card 1/2

~~M~
H 'E -K,
U N T R -17
c
0
J i~
e c n c:~ 1,:,,i ai, i a
y. (:nemical F-rrjuctii
ti firr, c a e,: i ri o I o
0! 1! V. M a a n d te C h n o t (4
e -;x t rac -.:.or, of UranLuim 1rom ll-lixeo J -
r., - nlor: c -a So A'---it i cns
2 ~V-. i' i FA i rn r:7-e- a r r e --I k n a r~
!:~.xtvre of' iC-. anJ
ti t ra,~ d rcm i. rie ao. u t ion c~; ra ineo v-i t i s e
rc -e La 61 C a -A on-e xc h;inze res i n
fT*co,. the resins i;itn a i ri n
q I u tlj
s~, L;~i -atca orn. the e'. ements ri 1' ~- -, a r,
0 d ~ C t 5 B V 1
F e j- t, 4n i,,, t : e r a r e ~-l r
p p o r- a i I o ' -21 a r, - i. r. u a a c-, n
ti 4 -ic-iTraphy lints seven tit Leri.
e F~ e:
o1' 'ne nur- , Par induttry

PEKIMK, Vladimir; STASTNY, Vaclav; BUDLOVSKY, Josef
Use of organic phosphates in agriculture in the forner Usti re,--iGn
during the period of 1958-1960. Prac. lek. 14 no.6:289-291 Ag 162.
1. Oddeleni hygieny prac,3 KHES KUNZ v Usti nad Labem, prednosta I-qJD-..
V. Pekareko Ordinariat nemoci z povolani. KUNZ v Usti nad Labam, ordinar
MUDr. J. Budlovsky.
(PHOSPHORUS POISONS ORGANIC)

MU, Bohuslav., akademiks, law-eat statni cony; KAUT, Vl., inz.;
SVCRC(YVA, S.P IMDr.; TtSL, 14.3. IfDr., C.Sc.; RABA. Jan.;
HUMU, Jan.. inz.; YJAMCEK, Rostislav; BETTET 114, Jan, inz.;
HAIA., Eduard., doe&, inZo, dre; UHER., L.,, inz.; KOITIK., E.;
ERDOS, Emericb,, doe., Jnz., dr.; VOSOISOIL.. Jan.. doe., inz., dr.;
HADENIK, 0., inz.,- HRIJDKA, J.; HOSTALEK, 7-denek, inz., dr.;
ROL, K.j, inz.; PEKAIEK Vl. MUDr.; BLISTAII.. J., inz.; STDhCH, 0.
inz. LL_=!A
A national conference on protection against chemical fLUWs
-from electric heat plants; a sumary of reports. Energetika Cz
3.1 no.2:109-111 F 101.

r- WM,Vl&djMjr; SWHT&,Theo(lar; JIZERA,,Zdenek
On the Droblem of air pollution by tare daring electrolytic
production of aluminum., Pracovni. lek. 11 no.7:367-368 S '59.
1. Oddeleni hygieny prace EM, Usti n. L.
(AIR FOLWTION)
(TARS "I
(AWMINUM)

DIDI&NT,J.; DUFZK,J.; HOSKOVU,J.; KRISTOF,M.; PlIKARICKJ.; ROTA,B.;
VII&K.M.; Technicim spoluprace: Kublakova d.s. M.
ElectrooncepNklographic study of hypnosis, Canko psychlat.. 55
no.5:285-295 0 159.
1. Psychiatricks klinika a neurologicka klinika KU v 11~7azv,
Ustredni zdravotni. ustav MV; psychiatricka lecebna v I't-aze 5.
(BMTRMCEPHAlA)GRAPHY)
(HMIOSIS phys iol. )

RARDODEJP Z.; PEKAREK, V.
- I
Styrenes. Prac. Lek. 15 iio.8:suppl:19-20 0 163.

6/08IJ62/000/012/034/063
B166/BIOI
AUTHORS. Budlovsk~* J-P Pekg,rekp V,
TITLE:. state of health of workers engaged in the production of
glass-reinforced leminated plastic#
PERIOPICAL: Referativnyy zh~rnal* Khimiyap no. 12# 1962p 369, abstraot
121413 (Fracovni li;kar**.9 v. 13P nw- 6-91 1961, 481-483)
TEXT:- luring a sanitary and hygiene study of two organizations producing
glass-reinforced laminated plastics styrene vapors in an average
concentration of 188 and 587 v11 were detected in the-air of working
positions which are not used every day and not for a whole shift. The
maximum permissible concentration according to American standards is
420 V/1. During a medical check-up of 34 workers at both organizations
(engageti on this work from 2 weeks to 2 yearep and aged between 16 and 51)
complaidto of coughep icritatior, of the eyeaq Inoreased irritability
fatigue, neurovegetative upsets and head aches were noted. A tendency to
hypotonia was noted. Tbe blood count wam unchanged,, 380-886 mg/.l
Card 1/2

KLAS, Ladialav, inz. (Kladro) ; PEKAM, Viktor, inz. (Kladno)
f --~ ------------
Precise electric control of linit tension of tension pul3ey
cables, used in hole boring. Elektrotechnik 17 no.1:11-12
Ja 162.
N",

-66 iw (1
L J~702 IJP(c)
ACC NRI AT6017138 SOURCE CODE: UR/0000/65/000/000/0195/0196
AUTEOR: Pekarek, Ya.
ORG: Aritma National Enterprise.L Pra ue . ChSSR (Natsional'noye predpriyatiye Aritma
S,_
TITLE: Universal transistorized ?EDA-40 rA analog computer
SOURCE: Sovet ekonomicheskoy vzaimopomosichi. Postoyannaya komissiya po Poordi-natsii
nauchnykh i telthnicheskikh issledovaniy. 3redstva i metody nekhanizatsii podgoto'-'~'i i
poiska nauchno.-tekhnicheskoy informatsii, inzhenernogo i upravlencheskogo t-.ud3 Weans
and methods fw mechanizing the preparation and research of scientific and tec~inic-al
information and of engineering and control work); lektsii, prochitannyye na V~,qta,;ke
"Inforga-65" v mave-iyune 1965 g. Moscow, 1965, 195-196
TOPIC TAGS: analog computer, computer memory / HEDA T analog
, computer, HPLIA ?JT ana--
log computer, HEDA 40 TA analog --omputer, MEDA 89f analog computer
ABS'RACT: The Czechoslovakian K:.DA T family of computers is discussed. 7he ~UDA 40
is a compact wdversal nonlinear differen-tial analyzer which solves nonlinear
tial equations up to the 12th or4ler. The other systems are conventional analog cr--ipu-
ters. The MEDA T computer is built on the basis of small plug-in units. The
ing units are used in the MEDA T family: 1. TZP-1: 2 operational amplifiers lix-
chanical. modulator; 2. TDQ-1: 2 diode, parabolic type squarers; 3. TDG-1: one dic'je
1/2

L 38702-66
ACC NR: AT6017138
function generator with 19 linear intervals with fixed breaking points; and 4. TZK-1:
2 comparator amplifiers. Other features of the KEDA T are: repetitious operation with
50 solutions per sec, automatic hold in case of programmer or machine error (with in-
dication of the defective unit), 10 five-turn spiral precise ARIPOT potentiometers aivi
memory circuits. The MEDA T family includes the MEDA 20T, MEDA 40 TA and the HEDA 80T.
(14)
SUB CODE: 09/ SUBM DATE: none

mk,RXK. Z.
q "mom
Now method of staining of vaginal snears. Cask. gyn. 16 no.7:329-333
1951. (CLML 21:5)
1. Of 4.he Institute of Mother and Child in Prague-Podols, (Director-
-P~rof. J. Trapl, M.D.).

BYKADOIIOV, V.S., red. toia; PEKAFXTS, F.A.t red. tora; RADCMIKO,
G.P.., red. toma; M", red. toma; TY-ALICI-,*,
S.M., red. tomn; 175RAILFIVA, G.A. , ved. red.
[Geology of co&I and oil shale deposits in the U.S.S.R.)
Geologiia mestorozhdenii uglia igoriuchikh slantsev SSSR.
Vol.B. 1964. '790 p. (MIRA 17%12)
1. Russia (1923-- U.S.S.R.) Gosudarstvennyy geologicbeskiy
komitet.

8/169/63/000/002i/061/127
~W/Z07
AUTHOR.
Yekarets T.
~'TITLE. Geoloj 's
and, t:euctural characteristics and the
;ical
wrailable 4neialis of the southern part of TunBusekiy
basin
3-4, ab-
PERIODICA.1 I Ref erAtivnyy zhizrnal, -Geofizika,- no. 2, 1963
stract 2D19 (In'collection; Materialy po geol'.. i po-
lezn. iakopayeraym Irkutskoy obl.~, no. 1*(28), lrkutosk.,
1961 62-81)-
t 5XT: 'The -southern part of, the Tungusskiy basin may be resolved
::.intq~ three local structures'i4hich differ -sharply in their condi-
tions of formation. (1) The hollow between the zone of ArgarBk fold-
-:,i by the deposits of
ing and the Chadobetskoye depression, L lled
.,-Lower, Middle and Upper Caxbon".ferous, Lower Permian) and. Lo'~-;er
Triassic..
~(2) The nutskJ.y hollow,.in which conditions of coal de-
position were, analogous in the S3 part of the Tunguaskaya
1-:dyncline,-The coal.:seamEi ar~,thin and are found in the centria
Ca d 1/3~

-7- 7--_---_7 77"..
8/169/63/000/002/061/127
GeologicF.1 and s true taral D263/D307-
of the, depression;:a thick layer of Xiddle cind Upper Paleo-
zOic_,xoOkb ia~ also prealnit, b onta ining conglomerates of "exotic,
0 sitibn*. (3
c MPO
The KoXuyskiy: hollow, which,underwent uplift dur-
ing the lower,Carbonife::-ous~ au a result of which lower and Middle
Paleozoic strata were e:7oded baok to the Upper Cambrian. The hollow
.-began to f oila in ]Niddle. Carboniferou The BE margin of: the Tun-
gusskaya Oyncline ahd the - klarskiy hollow were thus formed earlier
than. the Xokuyskiy hcll(?i,7, and differ t'he-refore by a fuller oom-
.:.Plex:of Xiddle and Uppe3. PaleOZOiC strata. Useful mineral deposit's
are situated chiefly in . =egionz., .-;here terrace-f orming see ondary
-~.have. --elop '(Chadobetskoye, Angaro-KatangEtkoye,
structure. been det ed:
q:_Xovinskoy6,,' etc.). Diamondss coal, iron and other useful minerals
Dianonds occur most frequently in antielinal
rag ons aAd in.areas adj-oining:bollows and synclines, in the allu-
of~wh~16ch diamonds may be discovered, generally cut through the
7 base:.of:,Uj)per..?aleozoic strata,-,and are represented by lexotiol
conglomerctes.-The latter act apparently as secondary collectors
Of.locally-occurring diam9nds.,A wide distribution of ferruginous
'I'sandstones and hydrothexmal nagnietite formations was established
Card .2/3

7 . - - - . I - r

5 ( 2 )` SOV/7 8-4 -1 c -23/4 o
AJTHOR23; Tylkina, M. A., PE-karev, A. I., Savitakiy, Ye. Y.
TITLi:,: Phase Diagram of the System Titanium - Hafnium,
PIAZI OIL 1 CAL Zhurna 1 noc rganic~ k?.qkoy kh ii.,,i i , 1959 Vol
pp 232o - 2322 (JESR)
A 3S T.-',A T Accordinry to data obtained by means of different :.,et-ods the
phase diajYram Ti -- 11f was constracted (Fig 1a). As it was to be
ex-clected acccrdin~~: tD the m--Rlogous ~;tructure of the electron
shell of `-ese clE;:.ients, they form a continuous series of solid
u- and .-Solutior's which are separated by a diphase a+ re-
gion. T~e curves cf the changes of physical pro-.,~-rties of
the melts with variable comDosition (Fi.- 1b) confirm, this phase
diagram. Figure 2 shows the microstructure of titaniua - haf-
nium alloys trentLd in a diff crent way. There a re 2 f ic-1-ires
and 6 references, 3 of which are Soviet.
ASSOCIATION: Institut IlEtallurgii im. A. A. Bajkova Akademii naul~ SSSR (In-
stitute of Metallurgy imeni A. A. Baykov of the Acad_~my of
Sciences, USSR)
SLJBMIT~'ED: May 4, 1959
Card 1/1

33177
14rH s/i8o/6i/ooo/oo6/007/02O
qroo ir21 I-T&O 1418 E193/E383
AUTHORS: Savitskiy, Ye.M., Kopetskiy, Ch.V.,
and Novosadov, M.I. (Moscow)
TITLE- Properties of single crystals prepared by electron-
beam zone melting
PERIODICAL: Akademiya nauk SSSR. Izvestiya. Otdeleniye
tokliniclieskikh nauk. Metallurgiya i toplivo,
no. 6, 1961, 74 - 78
TEXT: The properties of high-purity W, Re, Ta, Mo, Nb and V
were studied on single-crystal specimens prepared by olectron-
beam zone melting (5 - 8 passes at 8 - 10 cm/h) from sintered-
powder compacts (2 - 5 mm in diameter) preliminarily degassed by
vacuum, treatment at 1 800 - 2 500 OC- It was confirmed by X-ray
diffraction study that single crystals were, in fact, obtained
by this mathod. No preferred crystal-growth orientation was
observed and, in some cases, there was evidence of a slight
(< 0.50) block misalignment. The existence of sub-boundaries
was revealed by metallographic examination. The results of
hardness measurements are reproduced in Table 1, where columns
Card 1/1

" ~177
S/ift/61/ooo/oo6/007/020
Properties of single crystals .... E193/E383
There are 2 tables, 5 figures and 6 references: 2 Soviet-bloc
and 4 non-Soviet-bloc. The four English-language references
Mentioned are- Ref. 3: A. Calverley, M. Davis, R.F. Lover
J. Scient. Instrum. , 1957, v-:511, no. 11; Ref. 4: II.R. Sn~atli
J. Metal!5, 1959, v. 2, no. 2; Ref. 5: H.W. Schadler -
Trans. Matallurg. Soc. AIME, 1960, 218, 4, 649.
S UB!, I ITT ED April 1, 1961
Table 1:
H V. K OIJMI
MeTaAn
ftlc:"t
I . 1
11 Meram
01g.10,1
I I
--- - ~x

W 345 345-355 MO 177 175-185
Re 112 220-250 Nb 79 130-140
Ta 76 t30-170 V 91 170-190
Card 3/3

26392
S/0 ~2 /~ I /() 2 7 /0C8,'0 //0 20
D 4,24 /B 2 ' ".
AUTHORS: Savitakiy, Ye. M., Kopetakiy. Ch. V_ Pokarev, A I and
Rovosadov, M. I,
TITLE: Device for zone melting of high-melting
by electron bombardment
PERIODICALs Zavodskaya laboratoriya, v. 27, no. 8, '0V 1046'
TEXT: A device for zone melting (Fig, ' ) wan design,~A aborfioriy a
redkikh metallov i splavov Institute. metallurgi! AN SSSR La-rdtory
of Rare Metals and Alloys of the Institute of Metall,irgy. A3 ','SSR) on
the basis of western rapers (A. Calverley. ~1 Davis. R., F '~,L-ter. J. Sci~
Inst-, 34, 4, (1957); H~ R. Smith, J of Nata7s. ''. - ~9"" '): This
device may be used to obtain single-crystal roda ';~O - 200 tim Ing and
3 - 5 mm in diameter for use in radioelectronics, .'n ihe ".AT43
of precision instruments, and for resear:~h purpooes. in e_',-.ron
bombardment, a zone is melted with a width apprcxama-.zy t~ tte
diameter of the specimen serving as anode Th- 1!qu-c tre-za. In
the melted zone by means of surface tension Tho above
Card 1/5

;,6 -14 9 ;'
Device for ... B-24/b2-5
the purification of rods 12 - 14mmAndlimeter. Th,~ sapp,cr. for fixing
the specimen 3 is placed on the water-cooled plate ', Trn*!.,:,-rr E)PrIngs
which permit free expansion of the specimen during naa!lng, rlro ';Red for
fixing the specimen in perpendicular position be"upen the moll vl.,den,lm clamps
4. The support with the fixed specimens Is insulated from -the plate and
serves as an anode. The cathode is a loop of tungsten filamt-rit C 6 - ~~ 7
mm in diameter, or is made of tantalum foil. It is fixei it) posit'.on
by the holders 5 made of steel. The cathode la h9aied by a -harged
copper wire connected to the holders. The support with the ~a*holfb hollers
is adjusted by a guide! nut which is driven out ~f th~- -.ham~,er
by a conical, vacuum-tight, mobile device One _-ath.:J" FirA tho
plate are earthed. The electrons emitte(i from he oathode are fccused
by means of two parallel molybdenum plates placed at a d-Istrin:e of 4 - 5
mm from each other. The plates have 5 - 7 mm openings. ThA wnGle
working chamber is enclosed by a water-cooled steel or g .!ass envelope 7.
The guide nut is rotated by a d-c electric motor 8 over a teLt irive
and worm reduction gear 9 at a total tran8miseicn ratic of The
electric motor is turned off by the limit switches '0 at a disance of
1 - 1.5 cm between focusing plates and specimen ho'derE Til'~
Card 2/5

26392
S/032/61/027/006/017/020
Device for... B124/B215
system consists of a BH-2(VN-2) forepump and a BA-05-1 (VA-05-1)
standard unit. The la-.ter consists of an oil vapor diffusion pump of
to
type H5 (NO, a slider, and a chamber with ionizqtion and thermocouple
manometers. A vacuum of 1,10-5 mm Hg at an evacuation rate of 3,000 1/min
may be attained in the system. A,rectifier consi-sting of a atop-up trans-
former and fOUTKP-110 (KR-110) kenotrons connected in parallel, was
used for feeding the anode grid. The rectifier guarantees semiperiod
rectification with a voltage of' 3.6 kv and..a maximum current of
approximately 350 ma. The above feeding system permits a continuous
regulation of the'di"tal. temperature and the'elimination of unexpected
overcharges. For visual check'6ng of the melting process, a lens was .
inserted into the glass envel 0pe through which enlarged images of the
cathode heated to 2000 - 25000C, of the focusing screens, and the zone
of the melted metal ce-n be pro,jected onto a screen. For the purpose
of degassing the.specimen before zone melting, the specimen is annealed'
in vacuo by means of En L-lectron beam, 100 - 3000C below the melting
point of the material. The melting conditions for some high-melting
metals are given in a table. The new device was used for preparing
Card 3/5

Device for...
S/032/61/027/008/017/020
B124/B215
Nb, Mo, Ta, Re, and W eingle oryetale whose properties demonstrate
the great value of zone melting by electron bombardment in a high vacuum.
There are 2 figures, 1 table, and I non-Soviet-bloc reference.
ASSOCIATION: Institut ibetallurgii Akademii nauk SS3R im. A. A. Baykova
(Institute of Metallurgy of the Academy of Sciences im'eni
A. A. Baykov)
Table: Melting conditions for
high-melting metals. Legend:
(A) Metal;,(B) diameter of rod,
mm; ~0) voltage v;)(D) current,
ma; E) niobium;' (P molybdenum;
~G) tantalum; (H) rhenium;
I) tvngsten. t
Card 4/5
T2jiTj'.n
T.
--'p I
~ Hanrome-
C, T..
4 11,00 J 110

. 2
2 1 E00 130
1 E-00 150
2.5 2-,W I GO
2 30?0 180,

29817
SI/020/61/140/006/014/030
D'00102
AUTHORS: Savitskiy, Ye. M., Tylkina, M. A-, Pekarev, A. I,, Gavrilyuk,
M. I., and 4",abavnova, A. P.
TITLE: Recrystalli-ation diagram of cast tungsten
PERIODICALs Akademiya nauk SSSR. Doklady, v 140, no. 6, 1961, 1301 -
1503
TEXT: By x-ray diffract--on studies, microscopic examinations, and hard-
ness measurements (Vickers hardne:3s, 10 kg load) the authors constructed a
complete recrystallization diagrain of cast tungsten (99.6 1146), After
casting the specimEm were compres~Bed (70 %) and annealed (16oooc). The
material had a grain size of 40 - 50 p. The specimens were compressed
from 6 to 90 % with a hanmer in a hydrogen atmosphere at 700 - 11000C.
These temperatures are just below the recrystallization temperature of
tungsten. After this treatment specimens of each deformation degree were
annealed in the range from 1000 to 2500 OC at every 1000C for one hour
(between 1400 and 16000C at every 500C). The specimens were electro-
lyticall lished (10 % NaOH in water, 1.7 a/cm2). The recrystallization
ly_po
Card

29817
S/020/61/140/006/014/030
Recrystallization diagram of cast B104/B1O2
diagram of deformed tungsten is shown in Pig. 1. At deformations between
30 and 90 %, recrystallization sets in at 14500C. The recrystallization
takes place between 1450 and 1600('C. At a temperature of 17000C, the
grains start growing. At 0 % deformation, recrystallization sets in at
16000C. The critical degree of deformation shifts from 12 % deformation
at an annealing temperature of 16000C to 6 % deformation at an annealing
temperature of 21000C. The coarsest grains were obtained by annealing at
25000C- With an increase of the 5tegree of deformation from 30 to 90 %
hardness increased from 380 kg/mm') to 440 kg/mm2. When recrystallized
grains appear, hardness drops to _,~60 kg/mm2. The optimum annealing tem-
perature of tungsten deformed by 1)0 - 90% was assumed to be between 1500
and 16000C. A comparison with data on high-purity single crystals showed
the strong influence of impurities on the recrystallization tenperature.
There are I figure and 4 references: 2 Soviet and 2 non-Soviet. The 2
references to English- language publications read as followst B, L. Hamon,
J. Metals, 12, no. 9 (1960); S. J. Noesen, I. R. Hughes, Trans. Met. Soc.,
AIME, 218 (7960).
ASSOCIATION: Institut metallurgii im. A. A. Baykova Akademii nauk SSSR
(Institute of Metallurgy imeni A. A. Baykov of the Academy
Card 2 of Sciences USSR)

29$/
S/020 1 140/006/014/030
Recrystallization diagram of cast ... B104/BlO2
PRESENTEM t June 2, 1961, by 1. 7. Tananayev, Academician
SUBIMITT.2 tMaY 31, 1961
Fig. 1. Recrystallization diaGram of commercial cast tungsten. Legend:
(1) degree of deformation; (2) annealing temperature; (3) mean diameter
of grains.
Card 3

SAVITSKIY, Ye.M.; KOFETSKIY, Ch.V.;-PEKAREVp A.I.; NOVOSADOV, M.I.
I
Obtaining, and the properties of, single crystals of hig, Iting
tungsten, rhenium, tantalum, molybdenum, and niobium metals.-~Bsl.
po zharopr. splav. 9-192-194 162 * (MIRA 16:6)
(Metal crytaw("~'zone melting)

FEKAREVP Ael,
FAthod of representation of a diagram "composition - property"
for ternary systems, Zhur.nuorg.kbim. 7 no.6:1481-1483 Je
162. (MIRA 15:6)
(Systems (Chemistry))

S/109/62/007/009,/009/CI8
D409/D301
AUTHORS: Dyubua, B.Ch., Pekarev, A.i.9 Popov, B.N., and
Tylkina, M.A. -z-
TITLE': 1"hermionic emission of tungsten-titanium and tun,~_-sten-
nafnium alloys and its dependence on oxygen pressure
PI'IHIODICAL: Radiotekhnika i elektronika, v. 7, no. 9, 1962,
1566 - 1573
TEXT: The dependence of the work function of VI-Ti and V-11f alloys
on their composition was investigated. It was found that-the work
function of solid solutions is lower than that o-f pure ME!talS. SO-
lid solutions and chemical compounds should be considereccl as new
emitters v,hose properties differ from the properties of pure zr.-.etlals.
As the original materials, tun,,sTen DOwder of grade .2~1 ('[Ciil
ly pure) vas used, titanium of grade mmn-IA (IMP-1A), and chemi-
cally-pure hafnium. The composition of the alloys was de-.crmined
by chemical analysis. The alloys underwent X-ray structu:~al and
metallographic analysis. The lattice parameters of the solution of
hafnium in tungsten were calculated; it. was found that t.,.e va4-ue of
Card 1/3

S/109/62/007/009/009/018
Thermionic emission of ... D409/D301
the lattice parameter increases from 3.160 to 3.185 KX. The ther-
mionic emiEision of the alloys was measured by means of an experimen-
tal lamp. T"or the VI-Ti alloys, three values of the work 'function
were obtained, in addition to the work functions of the pure me-
tals. These values are roughly similar (3..6 - 3-.75 ev). ~he depen-
dence of the thermionic emission on the oxygen pressure, was inves-
tigated for both alloys without Ba-coating and viith Da-coating. In
the first oase, the behFivior of-the alloys is as follows: 1) If the
oxygen pressure is increased, the thermionic emission chance s in
the same way as that of the low melting-p6int component; 2 the
critical oxygen pressure is higher for the alloys (at equal te-..,i-pe-
ratures), than for pure tungsten, but lower than that of the compo-
nent metals. In the case of Ba-ooated alloys, the following qu-.1_'-'~--
tive results were obtained from the experiments: 1) Under the ac-
tion of the oxygen, the emission of the alloys initiall increL~ses,
and then decreases (similar to the emission of tungsten~; but the
increase in emission is several hundredfold less than that of tunE7,-
sten. 2) In the case of the alloys, the drop in emission starti, aT
higher oxygen pressures than for pure tungsten, but at lower pres-
sures than for pure titanium and hafnium. The authors also calcula-
Card 2/3

ACCESSION NO# AP4009844 8/0149/6 3/ODD/OD6/01 I 1 /0113
AUTHOR i Pekavwq A. 1.
TITLEt Detemining surface tension of tungotent molybdenum, and rhenium
SOMCBs IVUL Taretnays metallurg4m, no. 6, 1963, 111-113
TOPIC TACSs surface tension, metal surface tension, W, Mop Re, drop tout
ABMAPTs Surface tension of W9 Mop and Re was studied by the drop method. The
proovd4re Involved a polished netal anode fixed vertically, and a tungsten wire
with a system of molybdenum fomming ple.tes placed under the anode. The lover free
end of the ancole was subjected to electron bombardment in Ya=m (6-e)xjo-5 = Hg.
During the upvwt botren"t of the cathode (with the velocity I mm(&in) the anode
was meltingt and the drop forming at ita free end grew longer and eventually seps-
rated. Beforo the separation, the weiloit of molten metal me balanced by the
surface towl(M
1/3
Card

ACCESSICE ND: -A~4999W
whence
lint.
'where a is was of molten metal and r is radius of the rode, Since the separated
It 'metal represents only part of the whole metal drop formed at the end of the rod,
-~sn additions], function
(3)
;Was AWOMMINS In*@ 6WO 64usttlon to account for the separaW volume dgenlin; on
the*radius of the rod. This voluse was calculated from the w*eight of Gitalz
fied drop emid from the specific Weigbt of the drop at melting tee"raturs. Aseum-
Ing that the volume variation durIM metal, malting deperAed an the tnw of the
1111tal lattlofig It was accepted that No arA W wo4pmeAncressed 2..* wA Be volume
4-7%- After the correction Fws Istrofto"O. the fbal formalat for the @&IOU-
latleft of swirm", $eeeelon W"
r
A1
tord

ACCMION NOs AP4009W
T
fte calculatices show" tMt surface tensions of Wp Hop mA Re were equal to 2220,
19159 and 2610 dynes/cm respectively. Crig. art. Met 4 formlas mA I figwe.
1: ASSOCUTIONs Mmkovskiy institut stali i splayovp Kafedre. chistyokh netallov i
poluprovoft*"y*kh mterialiff (Hoscow- Institute of Steel mA Allopq D"artmmt of
'Purs Metals " SmalomAnctor Haterialsil
1111127111 27ft63 DATB ACQs VM064 EXCL o' OD
Ito is? WTI. W5 i ODI

PEKAMV, A.I,; SAVITSKIY, Ye.M.; TYLKINA, M.A.
:Interaction of lithium With titanium at high t4mperatur'es-
,rrudy Inst. met. no.12:189-192 163. (MDU 16:6)
(Diffusion coatings)
(Titanium-NOtallogillphy)
(Lithium-Thermal properties)

PEKAREV) A.I,
Determining the crientation of tungsten crysta4 by etch figures.
Izv. vys. ucheb. zav.; tsvet. met. 6 no.,4tl23-126 163.
(MML 16:8)
1. Inatitut metaUurgii ANSSSR.
(Tungsten-PAtallbgraphy) I

ACC NRs AP6008069 SOURCE COD-Ev URI0032Afi/ID32i66V62i6VOi3
AUTHO)tl P*Narevjl A* I.; Carbwan, M. VP; CbistyakoV, Yu. D.
ORG: Hoscoullustitute of Steel and AIJMTjMoskovsIkiy institut stali i splavov)
TI~M: A metbod for tensile testing* of tungsten and 3nolybdenum single cryatals
12
5~ ~~-~7
SOURCE;, Zavlodskays'laboratorlya, v. 32, no. 20 19656 228-231
TOPIC,,TAGS:l molybdenum,single crystal tensile test finishing machine,
metal polisIdug
~ASSTRACT: 71i,autbors d-tscribe 8 special macbinikesigned for preparing single crys-
.tid sp4cimii to 'be used in tellwile -tea t-s-Ts-eexfIgure).
Ihe
single crysta3 for normal electrolytic p:)Iishing.
Cuyd'1/2 UDC:-'620.172
process reduces to electrolytic pOILsbiAg)Zf the ro-
tating single crystal I by sbaper catbale 2 In the form
,of P specially shaped polished disc. The cylindrical
single crystal is held by. two collets 3 and turned at
a. rate of 20 an SD-2 motor through a gear box 4
and belt drlvii $.I I Stainless steel disc 2, wbicb ro-
at a spaed 6f 15 rpm, is 1-04.2 am toward
the surface. of -the single crystal by lead smvw 6
in, such a .wav that the electrolyte from container 7
~16cated beneatb the disc wets the surfice of the
-J~~rjd ii'

I'17YA'ZOV A I yL D
At tach-mer. t to a me ta-'-' om -r, r c ~ c c pr. :1 Cr t
4 C - 3
of the e! u ~ ~C'.Li hin
C Euiul etchir,~-
of
VYs. ucheb. Z&V-; tsvc-t- met. 7 ",c- 41147-140 t,64
(!.:1--A -~' " : 1 )
-sPlqvov, kafedrn Fir-v!zvoLj.,,t,va
chistykh m,!t~djov j Po-luprovodnil:ovykh materialov.

PEKA~~EV, A.I.; CHISTIYAKOV, Yu.D.
Attaci-j-qnt to microscopes for the observation 3-r
and etching processes. Zav.lab. 31 no.10:1272 165.
19:1"
1. Moskovskiy institut stali i splavov.

G!Tlr-TYA,:"()Vv IbI.D.; Fi2WVJ,, A.I.
1-Utbolds of mt-illcfxuphlc atL%dly of caat ard deforml Umpten;
rovlr-v, Zov, lot, I'll ro, l2t2467-2473 065 WTP." 1931)

L 00-090-66 EWT
JD.,,
ACCE ION NR: AP5022336 UR/0149/65/000/003/0065/0072
669.28
AlMiOR;-- Tekarev, A.' Li-Chia!Y.Rkov Tu. -D,. Shchirenko. jq
Oysis of the-direction of
i TITLE: Statistical an preferential growth of singi
tals (if molybdenum obtained by electron bombardment zone reeryBtallization withi
out a crucible
S
C n metallur 0 65-72
OWt E JVUZ. Tsvet a~a glyagn .-a, 1985
TOPIC TAGS:' single ca~ystal givwth n, metal zo ctroni
molybdenur. ne Jining, ele
0 re
-heairi, me Ing 4"
ABSTRACT: The.starting matez~ial was 99
8% pure Llybdenum in the form of a
!oa d and polished,rod 5 mm.hi diameter wio an overall length of 200 mm. By
I Jour passes through tbe zone, a monocry-stal,!F30 mm long. was obtained. The
vacuvm during zone melting was better than 4- 10-4 mm 11g. Final purity of the
molybdenum reached 90.061,6. rhe orientation of the single crystals obtained
was determined by an X-ray method with an accuracy of �1C. Themostobjectiv
cri ei'
t Ion of the prefern-tial direct-Ion of growth of the single crystals is the direc-
tion or region with a max1mum density of orientations. This direction has the
itwd 112

Pu JDJJG.
ACCESSIOI~ NA. AP4047496 60149/64/000/004/0147/0149
AUTHOR: Pekarovj A. 1. j C!detyakovj Yu. I).-
nt to-a-inetal-inicrosape for d1rectobservation of the process of.
L TITLE: _Mbacbm6
el22trical iolls Lig.,anAjtchIjnLof r1lorontlons
SOURdE. :rVTJZ. Tsvetnayanietallurgi3a, no. 4, 1-9641, 147-149
TOPIC TAOS: metal microsecpa, electi1cal polishing, electrical etching, alloy
Werostructure
ABSTRACT: Bev eral devices -imd instaMfions exist for electrical polishf rq'r, and etching
of iiiierose-fttions, which-helpAD check arid--coritrol-the-amperage, -voltage, electrolyto,__
temperature; electrolyte flow rate and other features., The "Elipowist" Installation made
In East Gej*-znany performs electrical polls1iing and etching of 6 mm. diameter micro-
seettons urAer a special metal ralcroscope. The histallation facilitates the selection of
electrical polishing rates and ile ex
Wsure of. microstructural elements sup has the grain
boundaryi -spots, etehlrig,- etc.~ However, this InstallatIon. Is not alvays available nnd
may be replaced by a-Btandard metal microscope with an attachment designod in the
Cc-rd 1/4

J-L
.1370-61.'
ACCESSIOIN NR: AP4047496
authors' lbboratory (Fig.- 1 of,the Endloi,iure). The -metal -is observed through a plane-
parallel gl~iss plate. The atta-Imient. is placed on the specimen table instead of the
replaceable metal washer. The MIA-7 and A11174-8 microscopes Nvith OE-2.3 and OE-14
objectives4,have magnifications from - 7 0 1P 2-7 0, NvIth the possibility of taldng- photograpbs
u4th a mat,*Rcation of 300. Polarized '!,Igbt may be used for observations. Even greater
r~anglftcation Is.possible with the MVT :microscope. The attachment was used to examine
the microptructure of mono- cnd polycrystalline titen9rhe electrolyte was a 10%
aqueous s6lution oil sodium hy1roxide. ho attaimeillit m4 be used for proparing nlicro-
sections aad observiTig the stfucture of LuAgsten and molybdenum, and other electrolytes
-May I - -fdk -other metals,~-- peg. -a:,*t --has-.
iovodrdkov & Matelial
ASSOCIAI-ION:-- iWedra-proizvoildva chisty~Wznetallov I pDlup i*k ov
2aeow Institute of Steel and Alloys)
Semiconductor materiai4d
2
/4

ACCESSION NR: AP4034047
AUTHORS: Gurov, K. P.; Pekarev, A. I.
S/0126/64/017/004/OW/0504
TITLEt The influence oflii~zrities on the thormionic emission of tungsten
'.SOURCE: Fizika motallov i melAllovedeniye, v. 17, no. 4t 1964, 500-504
,TOPIC TAGS: tungsten, thormionic emis9ion, work function, conduction band,
t 4%
hafnium, tantalum
:ABSTRACT: An equation is derived describing the effect of impurities on the work
function of tungsten. The change in the work function is given by &P . A CIO - A Ej
The change in Eop the energy of the bottom of the conduction band in_t~e__absolu_t_e_'-
ienergy scale, is due to the additional potential energy of the impurity ions.
This is caused by. the excess charge Z (either positive or negative) of the impurity'
ion compared to that of the twigstdn ion and is a short range effect because of
screening by the conduction eloctrons. The change in E., the energy of the Fermi
.level measured from the bottom of the conduction band, is due to the change in
~the nunber of electrons in the-system. The relative atomic concentration o of
the impurity is assumed small enough so that there is essentianq no interaction
~..Card

ACCESSION IM: AP4034047
between impurity ions. In the approximation of nearly free electrons, the distri-
.bution of electrons is assumed uniform. Then AE ZC se where nA(EF) is
7 "A (EP)-.
~the density of states per atom per ev in the conduction bai)-d about the Fermi level.,
Also A Er where n is the total density of levels at the Fermilovel.
"AP AF~zF
For tungsten nAF (E~) is about three t1nos as large as nA(EF) = 0.27 atatoo/ov.
;With 'one atomic % of Rf in W (c=0.01, Z=:2) ev. According to expor-
imental datAi the work function is decreased by 0.1 ev, an it is for Ta in W
0.04.ev. Orig. art. hass 16 equations. and 2 diagrams.
ASSOCIATUON.- Institut metal1urgii im, As As Baykova AN MI (Instituto of
FAt&Uurgy M SSSR)
SUMUTMW 19Apr63 DATE AGQs May(A EXCL: 00
!SUB Core$ SS NO 1W SM OD3 OTHER: 005
Card 2

N. PEKAREVA
N. FEUREVA
I. A. PXVIN (ErY) M. I N. FEKAPEVA POD. PM. YLT. SAVITSKOGO ~rSKVA, cos.
IZD-VO LIT. PC STROITELSTVU I AF!KHITEKVRE, 1053. 300 P- nUTS-, PLAMS. BTRUMPAPHY:
P. 279-005) ON SPINE: MASTEPI SOVEETSKOY ARKHTTEIMIRY.
11/5
881,
.F4TA

FSLMVA. Nine Alekenndravan; VOLODIN, P*A*. red.; VINOGRAD, V.A., red.
'V.91'-'~~,,'--Il -
-"Oojrra~~ing ra-es of the Vaporshlys Transformer Factor7l Zhiloi rnion
Zaporoshakogo trnneformatornogo zavodA. Pod.red. P.A. Tolodina.
Vonkva, Goo. lud-vo llt-r7 po stroit., Arkhit. i stroit. mAterinlnm
1958. 57 p. (HIRA 11:9)
(Zaporoshlye-Housing)

MALUMEM, YAKOV ISAYEVICH
-
nlaktrostal* by Ya-I. Malaidiov and Pekareva, N.A.
Moscow, GOSSTBDYIZDkT,, 1962
126 pepillusop diagre, maps, iAblese
At head of titles AcedemW of Construction and Architecture SSR
Institute of Theory and Histrry of Architecture and Construction Techniques.

TOLODIN, F.A.; ZHMVLHY, A.M.; IOFAW, B.M.; KADINA, I.Gv; PICKAIMAq
N.A.; SETRIGALEV. A.A.; HIMVIN, G.B., red.; OSIMETS, Z.H..
red.; PAVLENEO. K.V.; BIOSINA, A.B., tekhn.red.
[Now districts of Moscow) Novye ralony Moskvy. Moskva, Goa.
izd-vo lit-ry po stroit.. arkhit. i strolt.materialam, 1960.
284 Pv (MIRA 13:7)
(Moscow-C-ity planning)

IvArIOT, K.A., kand. arkhitektury; VOLODINp P.A., kand. arkbitektury;
.pF,yJMVA, Yxmd.arkhitektury
.Axchitecture is in the process of reorganizing. Izv. ASiA no.2:
25-33 '61- (Architocture) (MIRA 15:1)

PEKAREVA, N.A., kand.ar~ddtektury; SIW,,Vl-;LEV, A.P., arkhitektor
-
Creative path of Pavel Vanillevich Abrosimovich. Izv-
ASiA no.2:134-136 161. (MIRA 15:1)
(Abro3imovich, Pavel Vasillevich, 1900--)

CIIERTKOVt B.A.; FEKAREVAj T.I.
Density and viscosity of a.queou.3 nolutions of (NH ) SO , NH HSO ,
and (NH4 )2504. Zhur. prikl. khim. 34 no.11143-1~6 2ja3161.4 3
(MIRA 14:1)
(Ammoni= siLlfite) pr,*- -
.1 -