SCIENTIFIC ABSTRACT SEBEK, V. - SEBES, T.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001447610011-6
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 23, 2000
• Sequence Number: 11
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

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F;~PPPTl !FDMA See 17 Vol 10 Nblic -'ealth Cct 59
2903. RESULTS OF AN EXAMINATION OF FREE-LIVING CARNIVORA FOR
LEPTOSPIRAE - Vfaleclky vyfietfov.4nf divoce tijicfch gelem na leptoopirosy
gebek Z. Parasitol. Lab... Kralsk64 flyg.-Epidemiel. Stanice, Jihlava -
CS=.EVrUM. 1958, 7/5 (331-335) Tables I
Ninety-seven free-living carnivora (7 species) and 22 domestic cats were examined
for leptospirosis; 5079 of the animals reacted serologically positively. Positive
reactions with L. grippotyphosa were found. once in Felis domestica, further In
foxes (Vulpes vulpes). in Mustella erminea, Mustella nivalls, Putorius putorius,
and once in Meles meles. With L. icterohaernorrhagiae, sera of 3 Vulpes vulpes,
with L. bataviae, the serum of one Mustella erminea and with L. australis A, the
serum of one Vulpea vulpes reacted positively. Most frequent were the reactions
with L. grippotyphosa (74% of all positive sera); with L. sejroe 17% were positive,
with L. icterohaernorrhagiae 6%. with L. australis A 2%. and with L. bataviae
2%. No direct proof of the presence of leptospirae could be produced. The examLn-.
ed species of carnivora c rvo
-vidently represent the so-called potential rese Irs,
where leptoopirar are not preserved in the organism for long periods. The impor-
tance of free-living carnivora for the epizootic spread of leptospirae Is evidently
-quite minor.
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t Aitrofan Semenovich; Afariaslyev, Mikhail Borisovich; Bim-Bad, Maks
Isaakovich; Ornatskiy, Nikolay Petrovich; Porozhnyakov, Vladimir Sergeyevich;
Pryakhin, Alcksey Ivanovich; Sebellnikov. Zf-tr-jyanayic~
Highway designing (Examples), (Proyektiroyaniye avtomobillnykh dorog (primary).
Moacow lzd-vo "Trans rt",~ 6r), 0395 p. ill a., biblio., tables. 60000 copies
p0 u
printed'. 311 ed. ,rev.
ITOPIC'rAGS. higliway network, highway engineering, highway structure. hydraulic
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PURPOSE, AND COVERAGE; The book gives technico-ec9nom4c, fundamentals for
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planningand design of highways in complicated conditions *a described.1
are, given; I
Hydrological and hydraulic calculations involved in the planning of crossings of
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Abs Jour Ref MAir Khimiya, No,5, 1959, No. 13045
Author Vichtarlel, 0.; Kralicek, J. Seberl.drL,, J~,
Inst Not given
Title Anionic Polymerization of Caprolactam 6, In Nov
Catalysts far Anionic Polymeriz"ion of-Caprolactam 6
Orig Pub Chem. listy, iq~8, 52, 11o 4, 636-639
Absrract ~-,,
T~e allcaline -catalytic polymrization of caprolactam
.
(I) is caused by any. compoual +,rhich may: convert -1 into
an anion of:the -CO417-type. These compounds.,may be
divided irrto.tbree groups: 1) acid salts which can te
easily decarboxylated with the fornation of C71 O-P Or
IT-anions; 2) salts ~ of the light volatile acids; 3) acid
salts, that decompose in any other way than'by the
decarboxylati'on int ostrong allmline compounds. :A
Card 1/4

4

z/oog/61/000/007/004/004
'Alkaline polymerisation-of 6- E112/EI35
po,lymerlisation rate to,such.an extent that it,,proceeds already at
temperatures well-below:the melting point of-the polyamide.
Polymerisation can therefore lead.to,a polymer in the solid state,~
and difficulties arising out of,changes of density during
crystallisation (internal stresses) can be mitigated, if not'.
entirely eliminatedi During polymerisation of s-caprolactam,
28,,cal/g are liberated, 'corresponding to a temperature, Iincrease of
50 IC in an adiabatically:conducted process. _.Thus#:in.order-.not-
to'exceed the melting point of the resulting polyamide- polymeri_~
sation.should be initiated below 160 'C,,ax,othervise ak polymer
melt, would be produced. The process presently.,described.leads,
directly to,a solld"polymer, practically free of internalstress.
Optimum r1eactionconditions for the,production of.large, molded,
objects from high-molecular-weight polycapramide are investigated,.
'particularly:the~effects of: .'I) concentration of N-acetyl-.
caprolactam;: 2) concentration of sodium salt of C-caprolactam.~,
initial temperature; -:and,,4) purity of c-caprolactam...,:An
the finished material in relation
to conversion rate anddegree of polymerization was also under-
taken. Three different samples of caprolactam were compared:
'Card 2/3
------- -----

23570
z/ooq/6l/oOO/00.7/0,04/004,'
:Alkaline polymerisation f
0 9
1) a commercial product of Czechoslovak origin purified.and freed
of moisture by distilling off in vacuo 10%.of-the,.original-charge
(the-distillation residue,.was.,found of sufficient purity for
further:experiments);. 2)'caprolactam crystallised from water;
3) caprolactam crys,tallised from benzene. N-abetyl.-c-caprolactam-
was prepared according to the method of R.E. Benson and
T.IL. Cairns (J. Am.~ Chem. Soc.,,, 70, 2115 (1948). Sodium salt.-of
caprolactam was obtained by.addingi,in 'aninert atmosphereand
protected from,moisture,. a solution'of,sodium methylate in
anhydrous methyl alcohol to~.s-caprolactam. Polymerisation
experiments.were undertaken with solutions of,the sodium'salt of.
caprolactam in-distilled caprolactam. Txperimental details are as
..follows.- Caprolactam, heated to the''reaction. temperature,.was
transferred together with the solution:of its.sodium salt,to the
polymerisation vessel (s*tainless steel). The charge amounted to.
101~kg caprolactame Afterstabilisation of temperature,the,
calculated amounts of N-acetyl-c-caprolactam,were,added under,
efficient stirring, the operation being~carried -out in an~atmos-..
phere of nitrogen. Heating by:means ofa thermomantle, which wash
Card 3/ 5

23570
z/oog/61/000/007/004/004
Alkaline polymerisation of e. ..... E112/E135
switched of as soon as the temperature of~the reaction'm~ixture
rose.by 50 OC. Resultsto beat'products.were obtained with
capro*lactam crystallised'from water,~b Iut proper.ties of, polymer
from technical caprolactam were of sufficient standa.rd.to warrant
exclusive use in further trials'
The effect of the initial*
polymerisation temperature on.polymerisation,rate was studiedand
results are-summarised by graphs. Equilibrium is.,reached after
10-35 min. and. rate of polymerisation increases wi,th-increase of:
temperature. Graphs are.,given for the polymerisation of.,capro-,
lactam with 0.3~mole.% sodium-caprolactam + 0.3 mole % N-acetyl-
caprolactam. Rate of reaction was very strongly~affected by the
concentration of N-acetylcaprolactam- The numberof:macro--
molecules formed during polymerisation is inversely.proportional,to
the intrinsic viscosity~and Increaseslinearly as the'concentration
of acetyl-caprolactam Increases.''Rate.of polymerisation IS s.
influenced by the concentration of-sodium-caprolactam in.a similar,
manner. As demonstrated.graphically, the.intrinsic viscosity
remains practically constant1with increased,concentration of~
sodium-caprolactam. The new'polymerisation.method *gave
r.eproducible results. Samples.of-the polymer,withdrawn from the,
Card 4/5

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