SCIENTIFIC ABSTRACT VOYEVODSKIY, V.V. - VOYEYKOV, V.V.

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December 31, 1967
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SCIENTIFIC ABSTRACT
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Application of the analysis ... S/051/62/012/001/005/020 E075/E436 6 H -(Z --T exper V and is determined by the width Allb of unresolved hyperfine structure or by the width 6141 of Individual component. For most aromatic radicals 1111i is not greater titan I to 2 Oe. In that case, A Hb is given by LHb = L - (2) Vr-2-(-n where n is the number of protons interacting with unpaired electron and to a factor depending on the length of the spectrum. The results of the measurements of component number and line width and also determinations of the number of units in which the delocalizations are small in relation to the molecular dimensions. Examination of anions I and II in the table shows that the presence of one conjugated system does not always give high frequencies of delocalization in a molecule. The frequency of delocalization of an unpai ed electron in a polymer molecule, which is not in Card 2/ f '~ S/051/62/012/001/005/020 Application of the analysis ... E075/E436 conjunction in the main chain is less than 3.07-1/sec. For soire polymers, however, there are high frequencies of exchange. In the spectrum of the polystilbene anion m.vL. 1300 and for some samples of polysterene there is a narrow central line, which may be connected with the appearance iniseparate molecules of high exchan,-p frequencies. This niay.bQ a consequence of the formation in these polymers of some ordered arrangement of polymeric units. There are 2 figures, I table and 7 references: 5 Soviet-bloc and 2 non-Soviet-bloc. The two references to English language publications read as follows: Ref.4': H.M.McConnell. Chem. Phys., v..33, 1960, 115; Ref-5: H.M.McConnell. Chem. Phys. v.35, 1961, 508. SUBMITTED: November 23, 1960 Card 34 38129 S/020/62/144/003/C26/030 B124/B101 S-, AUTHORS: Shelimov, B. N., Fok, N. V., and Voyevodskiy, V. V.9 Corresponding'Xiember of the As US�1F- - TlTLE: The benzene-photosensitized low-temperature decomposition of hydrocarbons FERIODICAL: A-kademiya nauk SSSR. Doklady, v. 144, no. 3, 1962, 5906-599 TEXT: As has been shown earlier, the product from photochemical decompo- sition of benzene (1), irradiated by ultraviolet light at 77 OK in trans- parent organic glasses is a substituted hexatriene (II) H2C-CH-CH-CH-CH.CH-R (HR being the hydrocarbon medium in which photolysis is performed), and alkyl radicals are formed in addition. As the forma- tion of alkyl radicals cannot be explained by the reactions hitherto assumed, this and the formation of gaseous products was studied from the epr spectra. Solid-phase reactions of I in mathyl cyclahexane (III) and 3:-methyl pentane (IV). were studied with concentrations ranging from 1.8-10-3 to 2.1.10-k mole/liter. The mercury vapor lampITP'4-7 (PRK-7) was used as the radiation source. After irradiation, the solution was Card 113 S/020 62/14..,/003/0206/030 The benzene-photosensitized B124 3101 Y3 defrosted, then recooled to 770Y, the gas pressure measured and the gas collected for mass-spectrometric analysis. The irradiated solution was subsequently diluted with n-pentane (V) and the amount of Ii fo=ed by radiation was measured spectrophotometrically at 275 mp. The epr spectra of the irradiated solutions of I in III were found to be identical to that of the methyl cyclohexyl radical obtained by radiati= of frozen (III) with fast electrons. The spectrum of solutions of I in IV consists of -4 1/ 6 high-resolution, hyperfine structure components with a uniform pattern splitting of about 24 oerst which is probably due to the CH3 CH 3- OH2_~ - CH2_CH3radical formed by splitting off one,H atom from the tertiary C atom of IV. When I is irradiated in IV, H forms-, in addition to the R-substituted II, while C 6D6 yields small amounts of HD in addition to H2 in the same hydrocarbon. The simultaneous formation of alkyl radi- cals is obviously due to-the decomposition of the hydrocarbon photosen- sitized by 1. The'most important feature of the reaction is that the :~n-z.z;ry rf the light quantum absorbed by 1 (112 kcal/mole) is transferred, ef ~_:i ,art, to the hydrocarbon molecule, which results in splittir- Card 2/3 S/02 62/144/003/026/030 The benzene-photo3ensitized ... B124Y3101 off one C-H bond, whilst the I molecule returns from its excited to the original unexcited state. Neither C6H 5';(C6D5') in the epr spectra nor diphenyl in the reaction products could be detected. Thus, the reaction due to ultraviolet radiation proceeds in two steps: (1) formation of Substituted II, and (2) the I-photosensitized decomposition of the hydrocarbon leading to the formation of hydrocarbon radicals and Of i12- The yields of Il and 2radicals are maximum with I or C 6D6 concentrations of 1.6-10-1 and 6.o.lo- moles/liter, respectively. The yield of II' increases;,,),/ 4 2-fold, when the concentration of I is increased frcm 1.a.jo-3 to 1:0.10-1 moles/litery,while the increase of yield of radicals is only 1.2-fold; with C6D61 the relative increase is 2-3 and 1.1 fold. There are 3 figures &Lnd I table. ASSOCIATION: Moskovskiy gosudarstvennyy universitat im. M. V. Lomonosova (Yoscow state University imoni 114. V. Lomonosov)j Institut kinatiki i goraniya Sibirskogo otdoleniya Akademii nauk SSSP, (Institute of Kinetics and Combustion of the Siberian Department of the Academy of Sciences USSR) SUBIIITTP.D: February 24, 1962 Card 3 3 SOLODOVNIKOV, Stanislav Panteleymonovich; VOYEVODSKIY, V.V., otv. red.; TARASENKO, VJI,.., red.izd-va; GUS red. [signals from the microcosm; magnetic resonance] Signaly Iz mikromira; magnitnyi rezonans. Moskvap Izd-No AN SSSR. 1963. 84 P. (MIRA 17:2) 1. Chlon-korrespondent AN SSSR (for Voyevodakiy), SHELIMOV# B.H.; FOXO N.V.; VOYEVUDSKIY V.V. - Photochemical decomposition of alcohols at 1-ow te=peratures. Kinetics of mathyl alcohol decomposition, Kin. i kat, 4 no. 4:539-548 JI-Ag 163. (MIRA 16:11) 1. ~bskovskiy gosudarstvennyy universitet imeni M.V.Lotonosova, khimicheskiy fakulftet i Institut khimicheskoy fiziki AN SSSR. MOLINp Yu,N.; CMIDZE, I.I.; KAPLAN.. Ye.P.; BUBENj, N.Ya.; VUX~&- VODSKIYP V.V' Formation of radicals in the radiolyvis of solid organic substances. Part 2: Yield of radicals in benzene and biphenyl derivatives, Kin. i kat. 4 no.4057-560 JI-Ag 163. OURA 16:1:0 1. Institut khWcheskoy fiziki AN SSSR, Institut khImichoskoy organicheskoy khimii All SSSR. LEBEDEV, U.S.; TSVETKOVO Free radical reactiona in irradiated pol7tetrafluoroetb7lene. Part 4: Reactions of fluoroalkyl radicals with molecules from the gaseous phase. Vyaokom. voed. 5 no,10:1500-1506 0 163. (MIRA 17:1) 1. Institut khimicheskoy- fiziki AN SSSR i Institut khimi- cheskoy kinetiki i goreniya Sibirskogo otdoloniya AN SS.SR. LEBEDEVP Ya.S.; TSVETKOV, ru.D.; VOYEVODSKIYp V.V. Free radical reactions in irradiated polytetrafluoroethylene. Part 5s Discussion of the reaction meehanism. Vysokom.soed. 5 no.11:1608-1614 N 163. (MIRA 17:1) 1. Institut khimicheskoy fiziki AN SSSR i Institut khimicheskoy kinetiki i goreniya SibirBkogo, otdoloniya AN SSSR. FOK, N.V., SHELIMOV., B.N.9 VOYEVODSKIY.,- V.V. "On the photosensitized decomposition of hydrocarbons by benzene and its derivatives at low temperature-* Report submitted to the Sixth Intl- SYMP- on Free Radicals, Cambridgeg England 2-5 July 1963 VoyEVowKir, Vladislav Vladislavovich *Application of the electronspix resonance method in heterogeneous catalysis"*. Report to be submitted at the Third International Congress on Catalysisj (IUPAC),, Amsterdam, Netherlands,, 20-25 jul 64- VOYEVODSKIY, V. V.; SOWUKHIN, R. 1. "On the mechanism and explosion limits of hydrogen and oxygen chain mlf-lgnition in shock waves." report presented at the 10th Intl Combustion Symp, Cambridge, UK) 17-21 Aug 64. Novosibirsk Univ. VOYWODSXIY, Vladislav Vladislavovich "Application of the electron-spin resonance method in heterogeneous catalysis." report Bubmitted to 3rd Intl Cong on Catalysis, Amsterdam, 20-25 Jul 64. BLYUMENFELID, L.A.; ~OYE~VQq5KTY,j,.V..; SOLODOVNIKOV, S.P. Nature of ion radicals formed during interaction of potassium and sodium with some aromatic hydrocarbons. Izv.AN SSSR. Ser.khim. no.ltl58-160 J& 064. (MIRA 17:4) 1. Institut khimicheskoy fiziki AN SSSR. VINOGRkDOVA, V.G.; SHELIMOV, B.N.; FOK,N.V.; VOYFVODSKIY, V.V. Law temperature decomposition of hydrocarbons photonensibllized by some benzene derivatives. Dokl. AN SSSR 154 no.1:188-190 Ja'64. (MIRA 17:2) 1. Moskovskiy gosudarstvennyy universitet im. M.V. Lomonosova i Institut khimicheskoy fiziki AN SSSR. 2. Chlen-korrespondent AN SSSR (for Voyevodskiy). VOYEVDDSKIY., V.V. Inhibition of paraffin cracking in the gas phase. Kin. i kat. 5 no.4: 603-608 il-Ag 164. (MTRA 17:11) 1. Institut khImicheakoy kinatiki i goreni~u Sibirskogo otdcleniya AN -OSSR. Ty, V.V, VOYETODSK.L Chemical transformations at low temperatures. Vest. AN SSSR 34 no. 2;56-62 F 164. (MIRA 17:5) 1. Chlen-korrespondent AN SSSR. BUBNOV, N.N.; BAZHINp N.M.; VOYEVOWSKEY Vj. photosensitized decomposition ~! saturated bydrocarbcna and alcohols in the oollde phaa-,, Kin, i kat. 5 w3.2057 Mr-Ap 164. (MIRA 17t8) 1. Institut khimicheskoy kinatiki i goTeniya Sibirskogo otdbleniya AN SSSR. BAKH, M. A.; VOYEVODSKIY,, V. V.; GOLDANSKIY,. V. I.; SHMN; A. S. "Use of powerful radiation sources in cnemical invest igat ions." report submitted for 3rd Intl Conf~ Peaceful Uses of Atomic Energy, Geneva, 31 kig-9 Sep 64. 7-) YVI'ili. [ji L001 1W-1 8/0190 ACCESSION NR. AP4=76i. S/0020/64/154/001/018 AUTHOR: Vinogradova, V. G.,~ Sholimov,, B; Noj Vokp N. V.; Voyovod- slciy, V. V. (Corresponding 'member) TITLE: Photosensitization decomposition of hydrocarbons at low temperatures by benzene derivatives I SOURCE: AN SSSR*, Doklady, v. 154, no, 1, 1964, 188-19o TOPIC TAGS: benzene derivative , hydrocarbon.,, aromatic hydrocarbon.,, hydrocarbon decomposition.. photosensitized decompoaltion, toluene, ethylbenzene, iso-propylbenzene, pxylene. dipheny1methaney chlorobeenzene, triphenylmethane, fluorobenzene, acetophenone, ultraviolet light, o xjvlene., m xylene ABSTRACT: Diluted solutions of benzene derivatives, such as toluene, ethylbenzene, iso-propylbenzeneo ol m and p-xylene, diphenylmethane, triphenylmethane, fluorobenzene, chlorobqnzene and acetophenone in 3- methyl pentane and deuterium-containing 3-mothyi pentane were sub- jected to ultraviolet light at 77 C- Hydrogen was icolated and 3- Card -1/3 L J ACCESSION NR; AP4010761 ASSOCIATION: Moakovskiy gosudarstvonny,*y univeraitat im. II.V,,Lomo- nosovs. (Moscow State Univernity), Institut Ichimichookoy fizikio All SSSR (Institute of Chemical Phynies, AN BSSR) SUBMITTED: 033ep63 DATE ACQ: 10rbb64 ENCL: 00 SUB CODE: 0C NR REF SOV: 004 OTHER: 011' Card 3/3 ACCESSION NR: AP010761 methylpentyl radicals were formed in all cases except in C 11 F 4 J' C6H5C1 and C.6H COCII solutions. The initial rate of H ev21~Lion was measured and r2lated to the concentration of the tripyet stz- *"e oC aro- matic molecules. The data agrees with the assumption that molecules of aromatic compounds in the triplet stat,e' participate in the photo- sensitization reaction. The energy of the triplet levels of the aro- matic compounds is not higher than 78-85,kcai/m-ole. The relationship between the rate of the formation of hydrogen and alIqjl radicals for toluene and benzene solutions depending on light intensity is in- vestigated and the data are tabulatedO The longer life of aromatic molecules in the excited triplet state makes it possible to absorb one more light quantum while passing to the higher triplet level, and owing to the eneq;y excess (as compared to the energy needed to rup- Uure the CH links) causes the photos en si tizati on decomposition of the solvent molecules; Origo arts hass I table* Card 2/3 ODINTSOVA, S.P.; SHELIMOV, B.N.; FOK, N.V.; Vq VODSKIY, V.V. Temperature dependence of the rates of benzene photochemical reactions in hydrocarbon solutions. Izv. AN SSSR. Ser.khIm. no.31572-574 Mr 164. (MIRA 17s4) 1. Hookovskiy gosudarstvannyy universitet im. M.V.Lomonoscrva I Institut khimicheskoy fiziki AN SSSR. ACCESSION NR; A~40259o6 S1003016VOO0100-21005610062 .AUTHOR: Voyevodskiy,'V. V, (Corresponding member) TITLE: Chemical transformations at lau tomeraturos ;SOUPCE: AN SSSR. Vastpik, no. 2, 1964, 56-62 1 '20PIC chemcal transformationA low tekooraturej solid phase, storeospeci-! ficity, radiation polymerization, frozen monomer, free radical AB91'RACT t This brief review deals mainly with radiation-chenical trLsf.ormations and the reactions of free radicals in the solid phase at low te;,r?eratu.-e3. An essential role in the revival of interest in Ivr temperature reactions is due to the observation that polymers obtained at those low ter;peratures possess storoo- spacific~ty) as. exemplified by the formaldehyde and acotaldehydo polymors, tho :r.,,eltinc, points of which are -117 and -'2.",C respectively. In the field of radiation polymerization of frozen monomers, it was auggested-l"hat the extremely rapid onsat.: of the polymerization process was duo to some kind of broachinm of the strictly a o r. e 4,j -rically oriented molecules of the monomer by an initially formod,active~ ;center. The mobility of components of solid frozen organic compounds,, such as the Cdrd --- - - - - - - - - - - - - - - - - - - - -7- :-7~ ACCESSION IM: APLO25906 'rotation of Mothyl ~roupss was revealed by the electron paramagnetic resonance i technique at the terVerature of liq04,nitrogen~'. The molecule of cyclohexane 15 Knovm to undergo rotation around -.,!,.roe main, axes at -87C. The dopondence of t-he reaction rato on'the frequency tl-* intrxiiolecular sliifts.,~n tho solid atate is stressed, and the role of the mas of the factor o-,PJ/RT is omphaz Its sianificanco, , however, disappeaw.,; vhore ionizing radiation is brought in, Q The cleavage p,j1_cA9mica1 bonds and the formation of free radicals are now becoming of prime L~p"ortancea 'The formation of molecular hydrogen is an invariable conse- in radiochemical transformations of most solid hydrowbons, The free ,radicals, in turn, can undergo a series of transformations and may also bring about ;a kind of cros.s linkaGe, causing the so-callcd radiation vulcanizatidns a process ,,already used by industry~ By a proper:application of low temperatures it is to "freeze" theprocoos at a desired level, without permitting secondary ,reactions to take place., At the Institut k1iimicheskoy fizild Akade=.** nauk SWR (Iistitute of Chemical Physics, Academy of Sciences SSSR), a special spectronTotor 1was constructed which permits determination of the structure of froo,radicas and concentration during the process of irradiation with fast electrons. The !technique reveal& that the saturated hydrocarb.ons are 20-30 times less 4esistant V3 Ccud ----- -- ACCESSION NR: AP4o25qo6 to tho'effoctl., ioni!zzing 'radiation than benzenn, while the ter-phenylz and some other highly conjugated systerLs, are 2~-20 times more resistant.. Insic;ht has boon gained into the nechanism of the interactidn of the huge lquantums of radiant energy with the molecules of the irradiatod substrate. it was -found that the excitation energyis actually capable of being transported within a .Solid phase, not only within a single molecule but also between neighboring inolecules. The author describes a ki.rd of collective state of excitation (exciton !in irradiated materials, involving a large number of bonds. Electron transport 1presumablylalso occurs In irradiated solid systems. The possibility of stabili- Izatt.ion and accumulation of free radicals in systems at low temperatures has been 4 the atoms of hydrogen in a hydrocarbon attain such high .verified. At 7T mobility tI,at they react instantineously with radicals or other hydrogen atoms. The con- stants of rate and activation energy of free radicals in irradiated systems a'. low te:miperatures hum beea determin d. tZSCCTITION: none I SUB101 VM: 00 DkT---;' ACQ- O8Apr64 ZMICOD-*: CH NO Ra SOV:L 000 03 1 Ca-rd ENCL: 00 OTHER: 000 I ~ -, I , I I I I I I I . m -,. I ~ I ~ ~. .,- . ~ _-,_ . L - : -z , . ~l (T-- I .: - - ; - E;- :--, -7,=~ Z--, -- -; - L.- - -Z. :, - I I -,-, -I - ": -,,, ia I, ~ , ~ ~ w~ ;, --- I VOYEVODSXIY, ~L. V.; SOLUKHIN, R. L "On the mechanism and explosion limits of hydrogen and oxygen chain self-Ignition in shock waves." .report submit ted to 10th Intl Symp on Combustion) Cambridge, UK) 17-21 Aug 64. Novouibirok Univ. Vw i MM" - M.M. -M ItS ~'~v ; - "i--i At , , ~~ - n 2.~ - - ~: " ".2 ~, ~.! Pi "I E-L-L-10827 -66---ZWT(m)ZEWP(JJ,"; n't WitAWRK ACC NR, ATS023443 SOURCE-CODE; UR/J)000/65/000/000/0249/02S3 AUTHOR: Shelimov, B. X.-' Fok N. Ve; Voyevodskly, V. V.1 ORG: none TITLE: Benzene and its derivatives Lit photosensitizttd hydrocarbon dec )ositio at low temperatures SOURCE: SJADozium vo elementarnym protsessam khimit vysokikh anargiy"t Moscow# 1963 El -23-kh energ ementarnyye protsessy khImii Vyso fy- (Mementary processes or the chemis try of high energies); trudy simpoziuma. Moscow, 1965, 2413-253 TOPIC TAGS: hydrogen, alkane, aromatic hydrocarbon, UV irradiation, EPR ABSTRACT: Initial rates of formation of hexatriene, I radical and hydrogen were studied at 770K %a a function of CGHG and C6D6 concentrations In 3-methylpentane. The dependence-of-iRrmation rates of hexatriene and hydrogen upon temperature was studied in various solvents using a 2.10-2 moles/l benzene concentration. All samples were UV irradiated at 770K. Free radicals were monitored by the EPR technique. The ob- ject was to elucidate the mechanism of the simultaneous formation of alkyl radicals and hydrogen during UV irradiation of benzene solutions at 7710K. The hexatriene formation and the photosensLtization were not found to be Interrelated. The UV irra- diatlon of CrH5CD3 In 3-methylpoutdne at 770K results In formation of 94% H2 and 6% Card 1/2 ACC NRo ATS023445 HD; hydrogen Is the sole product when o-D- and p-D-toluene in am subjected to UY Irradiation; H2, HDO and D2 resulted from W irradiation of C6HSCH3 in 3-wthylpentane. A photasonsitized decomposition of hydrocarbons according to the following scheme CAW, + RH substituted hexatriene CNXWO + Rif (RD) qIW4 + R + H 0* occurs in thecase of toluene. Results obtained with ICJT6C6*+RH+hv. system revealed that the rate of formation Of C6H$Cf12 radical Is 10-12 times smaller than the rate of formation of alkyl radicals, It was condluded that photosensitized decomposition of hydrocarbons at 770K also occurs In ethylbenzene, cumene, o-, M-, and p-xylenes. diphanyl- and triphanyimethane and other compounds. Orig. art. has: 1 formula* SUB CODE: 07/ SUBM DATE3 23Feb65/ ORIG RErs --003/---- --OTH -IMr:- 005 CoM: 2/2- APS02 pp)e)/Z"WP(j 6607 U 7 4 U 7710.q: fe. Afolla r4. Arqq-0 C2- 'YjO g; 1~~fj 'rO If 77 ifte AwWij , tVO062"16 777, 841.0k 6100 fail 0 1 ZVI )1~4r /009/ 04,W .67 C4 re Y 0 lk k. I solov, SOU roe #'J'z- C-V. a. k. . ANftn. ztv'est~Y4' OttraIcs Sludy Of the keto 'Pop, rAGq.. '0401 op /Ails?.,, 41, OPectroaco.. ~Ilft 0'3-4 Icheekaya / AC,p.. 'UAM D's no. 9, 19 p" PrOPVI~ 3 'P NAM 65 1566.16 .P"'W-2- 0 .1,80but ectra 0 64 We.. Per4,,_, yl. ?Of the foil ve torzfts 4100 re 'Qv '180pro Owing coa~po If 02 cor 0 U4ds c0 - fts detex-d0d * 7be *Pool Pil - aton of ;~l with 44 ra wera 44d 3.8 were Stu C-Ccaroo,50z~' Cb 8-sucli ftd. 49-2 'akM ;q'yt-~4-butYl Wed' 3 !Pftiz OrT48 ,4110'14, V-~CfrOV4. ftetyjzoeto~ -aloth,,, Vith br OfYI40et,, ter (60 '1 J1VAf-3 jash,4,ne, sac, 3 At eth '"Od 0"80 0)49.%, &180 2 r jrtu'M V1114 I" Uabr~cb fteutuents eat (40 Afc) ~Zlsoplr":' 'be kato 280- 4ad lb (8-1,00 no, ed 8,tbst,ue a cozl,eat aoa2~ 46 proj:wz' lwa ftraft Witij aff Wer of 04Y1400 a ka ch ~hDIZ 84d to Jjft;ft'Q'd d4ta L "64-66 -ACCESSION NRt AP5026507' lacatone) are almost pure ketows. The slight enolization of these substances does not permit the classification of the enil form in the pJA or trjV# series on the basis of the NMR method alone. "Measurements with the 01 Instrbibent were made'st the Tsentrall myy institut khtmit Vengerskoy Akademti nauk (Central Chemls!q Institute of the Hungarian Academy of ScIencpsayo the direct participation of Dr. h,_RAAq_hL*_whom the authors expresetheir gvatf di.11 Orig. art. has: 5 figures and 2 tables."' ASSOCIATION: Institut elementoorganicheskikh soyofte* Adadewil n&A WSR 91~ulltutq of Organometallic Compowula. AcadgM of Sciencegg R)j butitut khtmiabasimy Qw-UHT gorentya Sibiralwgo otdolenlys, Adadetall nauk SM (InstiWA of Chemical klietics and Oombution, Siberian BrwAh, Academy of Sole",89R-), W45~' SUBJUTTED: 04;u163 ENCL:' 00 SUB OODM OC, MP OTHZRs 014 NO RZF Bovi 000 TYUrESH, F.] KENDEf L; EMZHNYKH, T.; SOLODOVNIXOV, S.P,; VOYEVODSKIY V.V. - Radicals as intermediate products in the inhibition of radical poljr- merization reaction. Kin. i kat.,6 no.W03-211 mr-Ap 165. (MIRA 18:7) 1. Tgentrallnyy nauchno-issledovateliskiy institut khimii AN Venger- skoy Narodnoy Respubliki I Institut khizicheskoy fiziki AN SSSR. SHMMOV, B.H.; FOK, N.V.; -V9X4V .-,QDSK1Y,.,,Vj?,_ Photo3,vsis of ethyl alcohol solutions at 770K. Kin.i kat. 5 no.6:1008-1013 N-D 164. (MIRA 18:3) . I 1. Moskovskiy gosudarstvannyy universitet imeni Lomonosova, khimichoskdy fakulftet i Institut khimichtskoy fiziki kH SSSR. 1P . N " I~p - .It~ X.~V ~, , " 7,-,, ~; 1; V , =ZA-, iM AUTTIOR I Voyevodmkiv- u ti I.- '11~- ig ... I . ~ . ., , i I . 1 4 -4~ it ~: ~ : - -r ", , - - -- I I -,, - ~zf- '-' - - -.- - T. " -, , , - , 'i - .", '-'; ~, ~~ lx m - - ?~'r .~, , -I. - . i. .6i VO MODSM, V. I., alkademik Hbtaroly-tic fomation of fr6e radicali In the radlolysis of solid organic vubstances. D&1. PIT SI~M 159 no.4s87&-8?8 D 164 (MIRA 1841.) 1. Institut. khImicheskoy kinetiki i goreniya Sibirskogo ot- deleniya MI SSSR, NovosJbirDk. B ubno v. V-2MY ~'"Cl -~L-12-2 ~q 3,A WBNOVP N.N.; BA711-JIN, VOYEVODSKIY, Ui. - Fnrmation of alkyl radicals in the phototransfer of electron3. u Kin. 1 Mt. 5 no.3:568 W-je f64. (,%IFJ~ 17:111) 1. Institut khimichekoy kinatiki I goroniya Sibirskogo otdeleniya AN B AZ R I NN V, C I I T B R 11: T11 r.,v OD.,; m Yvv Some types of polyrzra 'With conjugated bonds studied b7 means of electron paramagnetic reaonance. Vysolccm. zoed. 6 no.8:1478-1482 Ag 164o (MIRA 17!10) 1. Inatitut ~Jiirniahuskoy kinetlkl i gorenlya. M~4^al ftln-+i~a nA ~qfl AU q-q-CM'l 1~-00927--J66_ ]~~/i~~w/EPF(" -WDIG WIDIP (J)/T/EWP (t)/RiP (b)/VdA (c) IJP(c)/RPL D57M) W%,TwAtm. ACCESSIOD OR: AP5020982 __7 __Ufl/0l95/65/0O6/0Wo5!7/o~64_ 543-878:546, 11-123:542.5 AUTHOR: -Panfilov, V. N.; Voyevodskiy, V. V. TITLE: The reaction-of hydrogen atoms with molecules -of some compounds in the-zone of a rarefied-hyAEc, en.flame SOURCE: Kinetiks, i ka aliz, v. 6, no. 4, 1965; 577-584 W TOPIC V catalytic combustion, combustion theQry, c0 ustion kinel ;icsq COM- bustion mechanism, hydrogen atont-reaction, hydrogen fuel free radical chain reaction, chain termination, controlled kfnefies, co ion activation energy, short lived moiety, kinetic flame control ABSTRACT: The reactions of hydrogen atoms-with molecules of saturated, unsaturatedi and aromatic hydrocarbons as well as with molecules. of monohydric alcohols were stadied. Electron jaramagnetic resonance measurements made it possib*le to observe the concentration of hydrogen atoms In rarefied hydrogen flames, and thus determine!-7 the effect of the above additives. Activation energies were calculated convention! ally fror. plots of rate constants vs time. A convenient parameter, a, was intro- duced, representing the dffectiveness of a given molecule in the repetitive "cYcle"17-7, Card 1/2 -------------SOMICE-coDEi--mi/goi-z-/67-/OoO-/052/OOOVGOok-- ACC NRAN7005951 AUTHOR: none ORG: none TITLE: Death of Academician V, V. V oyevodskly SOURCE: Pravdap no. 52, 21 Feb 67o P- 40 001- 8 TOPIC TAGS: scientific personnel, chemical personnel ABSTRACT: Academician V, V. Voyevodakiy died at 50. He was a well-known sp*cialist in chemical physics. (NC] !SIM CODE: 05/ SUBM DATE: none/ ATD, P111ESSI 5115 Card BAZHIN 0 H*M. I LIMIACITEVA, N.M. I BUENOV, N.11. I VOYMD6Kly 7j, Rflaotlans involvjnl a hydrogen atom In the ayntem H20 +Nsfw~114. Raction with h+ a KIns i kats 6 no, 01105~-1108 N-V 165 (MIRA 3.90.) I, 3hotitut khimicbeakoy kinetW i goraniya Sibiral(op ot- delaniya AN SSSR. Outmitted Saptamber Up 1964s, !~.",L J VA 11XJ/ Aj,M ACC Nli AP60-67M SOURCE 6 1607661 f6 AUTIfOR: Bazhin, N. M.; Kuznetsov, E. V.; 1Lubncvj_N. N.; !MvodsklX, V. V. ORG: Institute of Chemical Kinetics and C mbustion 90 All ich;skoy! _,S~p~~(Jnstitut kh1n kinetiki, i goreniya SO AN SSSR) TITLE;, Reactions of hydrogen atoms in the system, water-sulfuric acid-ferrous sulfate.1 11. Reactions with pnsaturated7l3iiFounds Kinet16 SOURCE., -i kataliz, v. 7, no. 1, 1966, 161-165 TOPIC TAGS: -hydrogen, free radical,_free radical reaction, unsaturated hydrocarbon ABSTRACT:- Previous work has shown that UV irradiation of FeS04 solutions in dilute sulfuric acid at 77K leads to the formation of hydrogen atoms, which are stable at this temperature. In this workthe reactions of such hydrogen atoms at 90K and 120K with acetzlen .1 ethylen .1propylene, allyl alcohol and carbon monoxide were studied. The concentrations of hydrogen atoms and of the reaction products were measured by observing the EPR spectra of the samples. Except for acetylene, all EPR measurementsi were made at 77K. Hydrogen atoms add to acetylene to form vinyl radicals whose hyperfine structure is similar to that obtained by other workers in the photolysis of, HL in-the presence of acetylene at liquid helium temperatures. In discussing the mode of addition, the authors compare their observations with other work on the addi-_ tion of hydrogen atoms to deuterated acetylene. Addition of hydrogen atoms to UDC: 541.141:546.7221226-145.2 L_ 17952-M ACC--NRs--AP6007776 ------ - propylene leads almos.t-exclusively to-the formation of-Isopropyl radicals. It was observed that ethyl and isopropyl radicals do not decompose under the influence of UV or visible light under experimental conditions. The spectrum of the reaction product obtained from allyl alcohol is very similar to those of hydrocarbon radicali RCH2N2 and therefore can be ascribed to the radical tH2CH2CH 2011. Since a protonated N e form af allyl alcohol is involved,-the radical in this case must bc 2CI12CH20 12- The energy decrease due to the Increased separation of the unpaired electron and the charge on the hydroxyl group must be sufficient to offset the energy increase of localization of the unpaired electron on a primary rather than on a secondary carbon atom. Addition of a hydrogen atom to Co yields a product whose spectrum consists of a doublet with a separation of approximately 132 e. and can be ascribed to the rad- ical 00. The radical decomposes under the influence of light, probably to H and CO. 'The authors conclude that under the above conditions hydrogen atoms can react with unsaturated compounds by adding to double or triple bonds, or to unshared electron pairs. Useful quan titative data concerning unsaturated compounds can be obtained in this manner. Orig. art. has: -2 figures. (VSI SUB CODE: 07 SUBH DATE: 143un65/ ORIG REF: 005/ OM REIF: 006/ ATD rRESS: Card 2j?a___11 -e./awri J i/rja A% hi I rjvv At Ij an/ V M/ %A%Z/ An ACC NRi AP6013381 SOURCE CODE: UR/0195/66/007/002/0230/0236 AUTHOR: Chkheldze, 1. 1.; Molin Yu. M.; Mfivnov V. F.: Chermysh*v, To. A.; B2!mn, N. Ya 1 VqevodskiX, V. V. ORG: Institute of Chemical Physics AN SSSR (Institut kh1micheskoy fisiki AN SSSR) Instituie-of Kinetics and Combustion SO AN SSSR (institut kinstiki i gorenlya SO SSSR); Institute of 25anic Chemlstry, In. N. D. Zelinskly, AN LSSSR (Institut organi- cheskoy kfiUli AN SSSR) TITLEt rormation of radicals during the radfolysis of organic solids. Part 3t EPR spectra and radiation YTe_1ds of rndicals In certain orgenoollicon compounds SOURCE: Kin tika i k1taliz, v. 7, no. 2, 1966, 230-236 TOPIC TAGS: free r-adical, organosilicon compound, irr .adiation effect, EPR spectrum ABSTRACT: The EPRLMethod was used to investigate the radical processes involved in the low-temperature radiolysis of certain organosilicon compounds with a view to de- temining the effect of the silicon atom entering into the aliphatic chain on the ef- fectiveness and direction of primary radloc.hemical processes. The radiation yields of the radicals.(GR) formed by irradiating the compounds with fast electrons at tem- paratures from -130 to -2800C were determined by the EP21method. It was found that 0. for saturated and aromatic substituted dsrivati"s of tetrimethyls I lane did not UDC1 541.IS-16 -Card _ 1/2 ACC NRi AP6013381 differ from G'R for hydrocarbons of siallar structure and amounted to 4-5 1/100 ey and 0.2-0.6 1/100 ev, respectively. ror compounds of the general formula (CH3)3SI(CH2) CHzC112 (n x 0, 1, 2), the radiation yield Is 0Ra 1 1/100 ev, which Is approximateig 4 times less than for hydrocarb*ns with double bond. Analysis of the EPR spectra . showed that the introduction of a silicon atom in the aliphatic chain 4oes not produce any appriciable changes In the rViolysle mchanism, Orig, art, hast 7 figures# 2 tableog 5 fonulasi SUB COW t 07;'2o/ Stu DATEs i2svo/ ono uro ooe/ On nri on 2/2 '776-66 AUTHOR: 1FAPJ)/E7WT(M) M/JW P6030704 SOURCE *CODE: UR/0195/66/007/004/073270734 .3 Bazhin, N. M.; Kuznetsor, E. V.; Bubnov, N. N.; Voyevodski It. V. ORG: Institute of Chemical Kinetics and Combustion,SO AN SSSR (Institut khimicbeskoy kinctiki I gorenlya SO AN SSSR) TITLE: Reaction of the hydrogen atom In the system H2O+H2SO4+FeSO4. 11L Reaction with saturated organic compounds SOURCE: Kinetika I kataliz, v. 7, no. 4, 1966, 732-734 TOPIC TAGS: hydrogen atom reaction, methanol, ethanol, Isopropyl. alcohol, ethylene glycol, Isobutyric acid, malonic acid, acetone, free radical ABSTRACT: Atomic hydrogen obtained by the action of UV light on frozen 1j20+H2S04+FeS04 at 77K was previously shown to react with unsaturated organic compotmds. In the present paper the authoTs studied the reaction with a series of saturated compounds having weak C-H ondsf c -1d (moth -0111 ethanolJ sopropyl alcohol, ethylene glyc Isobutyric acid, malonic a an , I and a etone). The reactions were carried out with 0. 1 M solutions of the organic reagents at 90 and 120K, and the products were Identified from the EPR spectra. It was found that the reaction between H and methanol, ethanol, Isopropyl alcohol, malonic acid, and isobutyric L h5776-66 ACC NRi AP6030704 acid resulted In the following radicals.- ~112011, CH3611011, 1131-CH3, HOOC-C-COOH and H3C- C113, respectively. In the case of methanol, the 6H2011 was further broken down to IICO, but no 6113 could be detected, With acetone, the reaction yielded C112- -CH3 Instead of H3C- ~-C]13, while In the case of ~H Oil ethylene glycol, Only 6112- 9-H and no 6H20H could be detected. The mechanism by which atomic H at approximately 90K can capture bydrogen from alcobols, organic acids, and ketones Is discussed. Orig. art. has: 5 formulas and I figure. (261 SUB CODE: 07/ SUBM DATE: O8Oct65/ ORG REF: 004 1 ATD PRESS: 5084 TOVBIM, M.V.; VOIIVUDSK&U, Z.L. Autoadoorption process. Part 1. Surface tension of salt solutions, Ukr.kbim.shur. 22 no.2,.173-179 136. (WAL q.- 1. Kiyevskiy gosudaretvanW universitet imeni T.G. Shavchanko. (Surface tension) (Salts) Z. z USSRI Physical Chemistry Surface phenomena. Adsorption. Chromatography. B-13 Ion exchange Abe Jour : Referat Zhur Xhimiya, No 4) 1957, 1-1387 Author : Tovbin M.B., Voyevudskaya, Z.L. Title Concerning the PFo-e-es-s--o-f-S-elT-Adsorption, 1. Surface Tension of Salt Solutions Orig Pub Ukr. khim. zh., 1956, 22, No 2, 173-179 Abstract The assumption is made of the existence of a phenomenon of self-adsorption which consists in an accumulation of molecules of an individual aubstance or solvent at the surface of liquid phase-air interface. On thq b5aic- of this assumption and.thermodynamic considerations a correlatict hae b';~an tablished between surface tension ((5 ) and vapor tension '(P) of s3clutions of non-volatile surface-active substances. In particular, as,a rtault of dissolution of electrolytes in water self-adsorption of water vapor at tht surface of the solution causes a decrease of p over t4e solution and am in- -crease of a of the solution, as compared with p and 6 of pure water. At temperatures of 25, 35 and 450measurements were made of (~ of r-4teous solu- tions of NaCl, KC-1, MgC121 BaC'21 KII Na2804 and it was sho**m that in the 1/2 USSR/ Physical Chemistry Surface phanoarmrta. Adsorption. Chromtography. B-13 Ion exchange Abe Jour Referat Zhur Khimiya,, Ito 4, 1957Y 11387 case of pure vater and of all thq solutions of the abova-statr-d .1&1tP_, ri:- gardleas of the nature of dissolved surface-6ctive substancE.3,6 d.'-p~t:'ids in an uniquely defined maxner on p. 7ais correlation is lin-59.r sLzA cn. ita basis vu calculated the value of self-adsorption of vz;,tir 'WL. I Ch i e (in 10-"j mole/cm2): 14'.58 at 250, 16.32 at 350, 19.26 at kio. on- dia6o- lution of surfac ~_- -active substances the effect of self-adao.-ptict. in iup- pressed by adsorption of the solute, resulting in decr,.-~&Ps'of 2/2 KARACEAN, B.P.; VOTIVUDSKIY, B.M. Valves of a new t]rpe for large diameter sewers. Yod. i san. tekhn. no.10:35-36 0 158. (MIRA 11110) (Sewers, Concrete) (Valves) .KOICIIAN, B.?~t-!OT-MSK1Y,,.1..B.H-. Chemically a.table plastic materials. Strot. promo 36 no- 7:42-43 J1 158 - (MIRA 11:8) MsStiCB) I j,,v4.adshiy naucblw BotpWziik KARLSEX.. G.G... kand.biolog.nauk;.VOMXOV, AIB Working out a method for investigating the vorking quaUties of horses. Trudy VNIIK no.17.-65-82 149. (MIRA 16;3) (Draft horses) I VOYEYWYI-~~abhiy .nauchW sotrudnik Improving horsel harrteses. Trudy VNIIK no,17:83-89 149. (MIRA 16:3) (Harness) TARLSIN, G.G.. kand~biolog.naukj VOTMOT, A.B., nauchnyy sotrudnik; KOBMN, B., red.; TMCffOT;-R-.,-Te-k1inr-9-r. [Using horses In agriculture] Ispollsovanis loshadel v sel'skom khosiaistva.- Moskva, Mosk.rabochii, 1947. 118 P. (MIRA 13:9) 1. Zaveduyushchiy otdolom konsiopolizovaniya Vsesoyuznogo nauchno- iseledovateliskogo instituta konevedetva (for larlsen). 2. Vse- soyusnyy nauchno-ionledovateliskly Institut konevodstva (for (Voyeykov). (Draft horses) ijoyzr,!0v, A. 13. 24163 A. B. Usov-rsherstvo,:,L-d%-k,, 'zonsko~, u-prcliahl. Trudy Vst~soyuz- ','auch, r,~ C:r% issled. D'-TA konevolstva, 17, 19~19, S. b3-9- SO: Lotopis, islo. 32, lg:i-?. !- VOMKOVO A.P. Automation and mechanization of the processes of the chemical heat treatment of steel parts. Avt. prca. 29 no.8: 34-36 Ag 163. (14IRA 1611l) 1. Moskovskiy avtozavod imeni Likhachava. 17,Oymiri,07, A. V. 24160 v 1xv 'k - V. K razrabotRo .-,ct0d0v ispytanny rabochilli kachestv loohadoy. Trudy Vscso~luz, in-ta 1:onevo-l-st.,a, MP. 17, 1910, S. 65-C-51. SO: Letoplo, No- 32, 1910- a &2z&a. xilt 'Lt kT I ;SjTj Ig 1 UIP 1'43 p 9 t~c c Viiij giv ct ;j prorAr tYpe hirmice f0t it %IKCI,.Il I ~ c h-,; tn f" TjjC ctwIptcr drall with 11"'14 i1 tv m d0m,"r, de. pUrpo'c' l c c i1tvO Two Cha"414 ftr,r Iwalofy ilat-a vc! A re sctjptl~jj of cruribl 1111 fill 111fir ' T'I'mcd-AK. t t f o -c ) oil the rt re- -110 AND Jim o4offs M of I CH 41$S I I.) Jb)ILVOJL I I IV NO H a '--F -5Y fTA" U. S. S. R, Pat. 29,M3, A I inner layer Is made C4 a high-Srule t- resistant basic or neutral matesLal; while the outer er i4. PrePIrtd from m refractory material which fus -;it scient' mechanical strength but wk;ch ii attacked by the Mag. I rors of attematers. j, . I ,Iskiro.arlazi 11 no-2:28- (Ilsetric resistors) (X'aA .101-3) SOV/120-59-4-23/50 AUTHOR: V, 1'7,4 . TITLE: A Balanced Hall-Effect blagnetometer with a Thermostatted Detector PERIODICAL: Pribory i tekhnika eksperimenta, 1959, Nr 4, pp 100-102 (USSR) ABSTRACT: The unit is meant for use in fields of strength 100- 16 000 oersted. The first part of the paper presents the theory. The detector is a piece of n-type germanium 2.7 x 2.7 x 0.4 mm, of specific resistance 2-3 ohm-cm. Fig 2 shows thebridge system used to measure the Hall e.m.f. (here 10 IiV /oersted at a working current of 10 mA at 1000 c1s). Fig 4 shows the thermostat system (the bottom pair of wires go to the detector, while the top pair go to a thermistor). Fig 5 shows a general view of the complete unit. The det- ector is designed to work at "-50C; the excursions do not exceed 1.5 OC at the thermistor, which is near the heater, and are only about 0.2500 at the detector, which is ther- mally insulated. The heater power can be adjusted in nine Card 112 SOV/120-59-4-23/50 A Balanced Hall-Effect Magnetometer with a Thermostatted Detector steps to suit atmospheric temperati-Lres from -30 to +500C. The paper contains 5 figures and 6 references,, 2 of which are Soviet and 4 English. SUBMITTED: May 14, 1958. Card 2/2 31828 S/194/61/000/010/036/082 9, 3 D256/D301 AUTHOR; Voyeykov, D.D. TITLE: Some problems of Hall emf-element construction PERIODICAL: Referativnyy zhurnal. Avtomatika i radioelelctronika, no. 10, 1961, 10, abstract 10 V85 (Izv. Leningr. elektrotelchn. in-ta, 1960, no. 43, 157-162) TEXT: Optimum admixture of ingredients for producing Hall emf-elements was investigated. The dependence upon the composition of the following characteristics of the Hall emf-elements is dis- cussed: Temperature behavior of the emf; the resistivity and Hall- coefficient changes in strong fields; sensitivity in terms of volt- age and power; equilibrium instability due to temperature effects. A comparison between elements prepared of different materials shows that for high ohmic loads and for strong fields most suitable are elements composed of Si and Ge; for weak fields and low ohmic loads at any field - elements of .InAs and In(As 0.8P0,2 Elements Card 1/2 i 31828 S/194/61/000/010/036/082 Some problems of.Hall ... D256/ "301 prepared of InSb are suitable only for relative measurements or for instruments working at low temperatures. 10 references. Z-Abstrac- ter's note. Complete translation_.7 x Card 2/2 1,,OXEYKOV,.,.D4trlY.,4.iitriy.evichj GERTSIGER, Leopolld Naumovich; KNYAaV, Xonsti~konztantinovich; LIVSHITS, Il'7a Aronovich; ESSENSMI, Allbert Yakovlevich; KPOV, K-K-pred. [Design of low-frequency enerators] Konstruirovanie nizko- chastotrWkh generatorov, TBy) D.D.Voeikov i dr. Moskva Izd-vo mftergiia," 1964. 225 P. (MIRA 1701 Vn-1k"- D. 1). UMNO 'MAGNEIRTS IN XILKS FUSING, COPPI11? IN T-101 4 4411W VVQPJET X I PIRY, we 5 (71, Vk;')--48 (MU).-I'lie ai ege of mative- !site over Dina% brietc. clay, and quartz Is Its resistance to, buleslairinfa-,inn. Tt was used with success for walli and, !archc% In kiln- rchtting copper. Its weak points are Its sensitivity In irm-,temuire changes avid dilatao(m. DiIA-' Atation of marticsite occum In a continuatis manner but only during cooling. The apcrture% must thcrefoce be: ca-rclullybitceland (fickilmrriviltil slowly when work eeaws-, 1 Aut4Wg', rnt was made. to.combine mapesite with Vinas' 4 =71(ervening Laytt of chromite was found tItI-11 necMa to a-Luim stretigth. the kiln wall* wat slightly Inclined: The thickneqs of the walls was equal to two brick: a m2gilc-,ite brkk In the InArrivir, thets a half Dings. brick, and a hall clay brick. or Itrid Ili- I,v ;4 ti-w for .1 %I'trili It . ,,,I !U-ir , 'J. 10. hi,,- A 1, dr, s y Mil-V For jigjp4a tIGNIFITAROUS MIT, R 3 p A KOM and of lillflilcei it c pttr 'Opcr type af furl,,,Icr for a "P"141 eusics h()'W to Oat it r Pt'r &-als WWI ItA4 and"'helf J.-he :~~rdld CIIIA j* ~11.tajjrrl de- purpo"O.- t1juptcts at'. (Ifv(~tcli to 0 Tlwo 'nIt'u.tMTI- Iry fornace.1t, Cc, reverbet"tc 3nd tlltlr r-rip"oll of mcOlods 0 on the ttfractlIry 44 (J. i.T. -I t_57 7`7 HEM D. D. IST AMD JAV LITTIN t1x% Alm ClIattl CF!C AUTHOR NOR It 1"19 m nonrim- 12 ZAL& U. S. S. R. Pat, 29,503, April 26, i1nner layer is aude of a high-gr de It" I "Sistant busic or neutral materl2l; "bile the outer er 1; prep2red from it refractory inateriat which line mechanical strength but which It altatted by the Ait, A S20~wr. T)- . U,%jNn MAGNISITY; IN KILNS FUSIM3, lij~ f(kiij-pi ~Jvau).--Iht advantage a ~xltc ov" Pir%'A' briek, CUY' and quqfti is Its felblance to* basic slat In fir,inn. It wa4 tvw4 with mcceii for wall i Rnd tarche-4 In kiln- t(Atting cWper. Its weak points art Its sen-m vify P~ hmprrmire changes and dilatation. Dila-' Jafian of rrvivic~itc fwrvrq in a cmilnumm inarintr but only dttrinK cryttirig. I he apcrtum~. must. Ocrdmt be cartfully lisicif and thr Wit c:~ul 4owly when work ctaqti i An a;paiment -mai mix1r. to cninbine magntsite with Dinas; layer of chromite wat found ud-' necmary. To"i-mure Ortrigib.. the kiln wall,; we" slightly T as equal to two Inclined. he ihkknc.!t of the walb w, brick: a magne-qite brick In IN Interior, then a half Dinjis ~.brick, anti a half clay brick. 1111 lip VOYEMV, D.D. Methods of increasing balance stability in Hall effect-devices. Zhur, tekh,flz. 28 no.10:2248-2254 0 158. (mmi xx:n) (flail effect) VOYEIBOV, D. D. , Cand Tech Sci -- (diss) "Construction of gaussaieters of increased precision, employing the Hall effect." Leningrad, 1960. 15 pp; (Ministry of Higher and Secondary Specialist Education RZ-FSR, Leningrad Inot of Aviation Instrument-Building); 20C copies; price not given; (KL, 26-60, 135) 24(3) AUTHORs Voyeykov, D.D. SOV/57-25-10-21/40 TITLEt Methods of Increasing the Balance Stability of a Hall Transmitter Netody povyaheniya stabillnosti uravnovashivaniya datchikov Kholla) PERIODICAL: Zhurnal tekhnichaskey fiziki,V,).L 23) lir 10, pp 2248-2254 033R) ABSTRACT; This is an investigation. of some of the causes of the balance instability of instruments used in engineering, the operation of which is based on the Hell- (Kholl) effect. The temperature instability during balancing is one of the principal obstacles to the utilization of such t--ansmitters in precision instruments. As, however, the compensation of this instability in a wide temperature range proves to be difficult it is more convenient to study the causes leading to such instabilities and to examine the possibilities'*of eliminating them already in the production of the transmitters. In a simplified form a Hall transmitter can be represented by a bridge circuit, the Hall generator being ganged into one of the diagonals. It J- a shown that the instrument error due to the unbalance of the Hall transmitter is inversely proportional to the field strength and to the stability co-t Card 1/3 efficient K of the transmitter. K represents the ratio of the Methods of Increasing the Balance Stability of SOV571-29-10-21/40 a Hall -Transmitter sensitivity to half the ioltage aczoss the current terminals of the Hall transmitter. The larger K, the smaller will be the in- fluence of unbalance of the transmitter upon the instrument error. Thus a stability coefficient as high as possible is one of the basic requirementq placed upon the design of a Hall trans- mitter. The influence of tha shape of the transmitter and of the carrier mobility upon the Ptability coefficient is investigated. The formula (4) deduced forY 1,isds to the following conclusionss 1) In order to Increase K an" the balance stability the ratio 1 , 2, which was recommended by Kjhrt (Kurt) (Ref 1), must be a abandoned in favor of a value keeping within the limits of 1* 0,5, a 1, (and d) denoting the dimensions of the transmitter. 21 Apart from an increa3e in K th'is choi_-e of dimenvions leads to a saving in semiconductor material. 3) X varies as the mobility at otherwise equal dimensions of the transmitter. Transmitters of InSb and InAs are to be preferred to such of n-Ge for measuring weak fields. It is demonstrated Card 213 that the principal causes for the temperature instability in Methods of Increasing the Balance Stability of SOV/57-OB-10-21/40 a Hall Transmitter balancing Hall transmitters are to be found in the heterogeneities of the crystal lattice of the transmitter material, in the recti- fying effects and the insufficient equipotential level of the Hall contacts. If the design is chosen in an effective manner and a corresponding method of production is selected the temperature stability in balancing the transmitters can be considerably in- creased. A.P. Kalmykov assisted with the production of the samples of Hall transmitters. There are 4 figures, 1 -table, and 3 refer- ences, 0 of which is Soviet. SUBMITTEDs February 13, 1958 Card 3/3 VOYMOV, IoDo , " --- Aleksandr rvana7icb Toeikov; peraoaal recollections. Keteor. i gi&-ol. no.12:15-22 D 158. (XM 12:2) (Voeikov, Aleksandr Ivano7ichp 1842-1916) 3(0) SOV/50-58-12-3/20 :AMORi TIM: Aleksandr Ivanovich Voyeykov (Aleksandr Ivanovich Voyeykov) Personal Reminiscences (Lichnyye vospominaniya) MRIODICAL: Meteorologiya i gidrologiya, 1958,, Nr 12, pp 15-22 (USSR) ABSTRACT: Pis article contains the reminiscences about his uncle of a nephew of the above-mentioned famous Russian geographer (1842-1916). Card 1/1 VOYIYIOV, I.G.. master. Organizing and mechanizing the work of repairing secondary comstuta- tion. Inergatlk 2 no.10:1?-19 0 154. (KLRA 7:10) (Ilectric switchgear) VOYe,Y1