SCIENTIFIC ABSTRACT VERTES, M. - VERTKIN, M.TS.

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SCIENTIFIC ABSTRACT
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T, 15877-66 AGG MR: AT6007452 SOTWE GOM: PU/2505/65/026/001/0052/0052 AUMM: Ver jq-ttal, Kovacs,, S. CRG: Institute of Physiologys Yedical University of Pecs (Pecat Orvostadomanyi Egyetem# Elettani Intezet), TITIE: Mechanism of hypothalamic control of the pituitary-thyroid system Llhis paper was presented at the 29th Yeeting of the Hungarian Physiological Society hold In Szeged from 2 to 4 July I SOURCE: Academia scientlarum hungaricae. Acts, physiologlea, v. 26, Supplement, 1965, 52 TCP1C TAGS: rat, hormone, brain. ra-di-Otsotope,,-phi5sphorual-endocrinology ABSTRACT: In experiments on male albino rats, the influence of bilateral electrocoagulation of certain hypothalamic aroaa on the oxygen consumption, p32 uptake and TSH secretion of the anterior pituitary has been investigated. Ozygen consumption and p32 uptake were studied In vitro. It was found that electro- coagulation in the anterior hypotl-almus which damages the paraventricular nucleus resulted in a significant decrease in oxygen conomption and p32 uptake by the ~anterlcr pituitary 911ces. In accordance with earlier obsorvations, tho TSH 1(_;ard 1/2 L 15877-66 FA64-i-HRI -P.T6007'452-- secretion was significantly reduced by the lesion.. The present rosults, 6arve as consumption confirmation that the rate of TSH secretion is related to the ox7pn and P32 uPtakd, W the anterior pituitary. SM GCM: 06 SMH DATE t now ------ -------- --- -- Card 2 ----- --- L 28qqo-66 SOURCV_ CCb;r~"_!__ h-U, 505/65/02-7/003 1/022 11 AUTHORt Xowcs. 3andors Sardor, Attila; VSEt.,osZs~tLzsa; Ve--tes, Maritt-ta 5 ORO: Institute n_1 Plusiology, lisdical Univnredty of Pecs (Poesi Orvottudomzxji Egyatem, E ttani 1nt&z-et_) '2,2e- TIM : Effect of lesions and stimilation of the aqrgdala on pi fundtion SOURCE t Academia aoientiarum hungaricae e Acta physiologica, v, 27. no - 3, 1965. 221-22' TOPIC T&GSt adrenal gland, cortisone, rat, thyroid gland, biologic wtabolism ABSMLCTs The possible regulatory role of the arqVialoid nuclous in pituitax-1-thyrol ---function has boon studiod in male albino rats. Bilateral eloctrocoagalation in the - I - - _ - - __ - - S 131 :'avqgda1oid nucleus did not influence thl upt0e by-thit thyroid, In response:-to electric- stimulationt- the- 1 4 uptake - varied with the applied fre ncy. Following stimulation at 50 0/8, 3 msed-pulses, 0.3- quo 1.5 V, the T11 1 31 uptake shrd a marked decrease* erte same stimulation failed ,,01produce a decrease in 1 31 uptake after adrenalectomy or cortjsone treatw tment. -A considerable ina-rease in 1131 uptake occurred folLrfdng stimulation -with lmmr.frequencie3' 15 0/5, 3 asec Pulses- 0.5-1-5 V. Orig. art. has: 7 figures f0"Ag. art*' in En&.7 ZJLT9j cowt o6 / mm DATst o8jul64 / oRiG Rr,.Ft 006 1 OTH REFt 018 Car L 43014-66 - Is --- I.ACC NR, AT6031S24 ODE t AUTHOR: Kovacs, Sandor-Kovach, Sh.; Vertes, Zauzaa-Vartesh, Zh.; 3and AWL Shandorp A.; Varteso Hariet a-Verte8hv M. ORG: Institute of Physiology, Medical UniversitZ ofEecep Pace (Pacei OrvostudomAnyi Egyatem, Elettani, Intezet) TITIE: Effect of mesencephalic lesions and stimulation of Eltuitary-thraid Metion 4.- SOURCE: Academia scientiarum hungaricae. Acts, physiologica, v. 21!1~0. 3j 1965t 227-233 TOPIC TAGS: radioisotope, iodine,, rat, brain# thyroid gland, endocrinology, cortisone ABSTRACT: It has been shown by experiments on male albino rate that bilateral electrocoagulation in the imsencephalic reticular P)rmtion results in a considerable increase in thyreid 1131 uptake. On stimulation of the same site with imp%jed deep electrodes, the 1131 uptake decreases considerably. The decrease in I uptake as a result of stimulation was present in adrenalectomized as well as cortisone-treated animals. Following stimulation,, the rate.of 1131 release by the.thyroids also.decreasese Orige art. has.- 6 figures. [Orig. art. in Eng.] SUB CODE: 06 / SUBM DATE: 18Dec63 ORIG REF: 004 / OTH REF: 031-8 I rnrA 111 MLP J 8 6 6 9 3 0MAU6 1,1.rdi~l--nUf4.W;PfO>[VZ-(IVV.IIV44yfV4j>I AUTHORa Vertes, Marietta; Vortes, Zsuzsa; Kovacs, Sandor ORG: bk_ukit_~Oof Ph7sioloor, Hodical UniversIR of Pecs (Pocsi Orvostudor-uq ftmtamo Mettod Intezot) t TIM: , Effect of'hMvth-q1aLdc stimilation on pituitary-tl*-rold function -SOURCE t - Academix. soientiarum hungaricaa o AcU pbysiologica, v* 27, no. 3. 1965, 229_23~ TOPIC TAGSt rat brain. tb~roid gland, hormone, adrenal g3ju-A ABSTRACT: The effect of stimulation, with electrodes placed in certaln hypothalamic areas, on pituitary-tbyroid function has been studied in male rat3. Stimiletion Ath electrodes Implanted dorsally in the anterior hyWthalamus, immodiately in front ojr'th-e-"-pa-r"av'e'ritridular nucleus, ora little more camdally, at the level of -the first third of the paraventricular nucleus at the latek-4 side of the nucleus, resulted invariably in a considerable incroaae in 1131 uptake by the thyroid. Following stimulation with electrodes placed more caudally, at the frontal level of the dorsomedial nucleus, a decrease in il3l uptake by .the thyroid wts observed, Following adrenalectomy, the sam kind of Gtimula_ .tion resulted in an Inverse change in 1131 uptake. i.e.,, instead of a do- ja~wa;ep,& considerable Increase occurred, Orig. a1-.1. hist 5 figuxes- rorig. art. In SM -C=8: 06- / SUM DATEs 13Ju164 ORIG RF.F-. 007 / OTH REF: 024 Card 11/1 LQ: vial V "JIG _ARY_ H KOVACS, Sandor, SANDOR, Attila, VERTES, Zsuz,ia, VERTE�_,.Marietta, Medical University of Pecs, Institute of Physiology (Pecsi Orvostu-d_o_m_a-n-yFr Egyetem, Elettani Intezet). Is The Effect of Stimulation of the Habenular Nucleus on Pituitary-Thyroid Function.11 Budapest, Acta Physiologica Academiae Scientiarum Hungaricae, Vol XXX, No 1, 1966, pages 39-45. Abstra : [Enalish article, authors' English summary modified) The effect Ict - of stimulation of the habenular nucleus on pituitary-thyroid function has been studied in male albino rats. In response to stimulation with im- planted, deep electrodes, thyroid 1311 uptake varied with the frequency used. A considerable lowering of the 1311 uptake was Invariably observed at a fre uency of 50 c/s (0-5-1.5 V, 3 msec pulses for 10 min). The decrease in 1321 uptake in response to stimulation did not take place after adrenal- ectomy or cortisone treatment. A significant increase in 1311 uptake was induced by stimulation at a lower frequency (15 cls, 0.5-1.5 V, 3 msec pulses for 10 min). 5 Hungarian, 6 Western references. [Manuscript received 7 Aug 65.) 58 - KOVACS, Sandor, LELKES, Jozsef, VAMA, Ferenc; Medical University of Pec-,, Institute of Physiology (Pecsi Orvostudomanyi E-yetem, Elettani Intezet). 11 Contributory Data on the Relationship Between the Trophic Hormone Production and 32p Metabolism of the Anterior Pituitary I. The Effect of Thyroxine Treatment, Yethylthiouracil Treatment and Thyroidectomy on the 32p Meta- bolism and 02 Consumption." Budapest, Acta Physiologica Academiae Scientlarum Hungaricae, Vol XXX, No 1, 1966, pages 45-52. Abstract: [Eriglish article, authors' English summary modified] It was shown by experiments using male albino rats that the 24 hour uptake of 32P by the anterior and posterior pituitary, and the 02 consumption by the anterior pituitary in vitro, were dpcreased by thyroxine treatment (20 4g of LaRoche thyroxine twice daily for 10 days). An opposite change occurred in response to thyroidectomy and methylthiollracil treatment (5 mg daily for 10 days). After thyroxine treatment, the J~~P content in the lipid-soluble fraction (expressed in I of the total uptake by the lobe) was increased,whereas it was decreased in the acid-soluble and RNA fractions. An opposite effect was achieved by methylthiouracil treatment and by thyroidectomy; i.e. as com- pared with the controls, the 32p content decreased in the lipid-soluble fraction and increased in the acid-soluble and RNA fractions. No appreciable change in the 32p content of the DNA fraction was observed in any of the cases, 5 Faste rn European, 14 Western references. [Manuscript received 1/1 7 Aug 65.1 VMTES, Marietta; VERTES, Zouzsa; KOVAGS, S. FXfect of hypothalamic stimulation on pituitaryi-thyroid f-unc- tion. Acts, physiol. acad. sci* Hung. 27 no.3t229-235 165. 1. Institute of Physiology, University Medical. S,:hool, Ncs. KOVACS1 S.; VERTES, Yarietta; 114HOF, S. A further study of the effe~~t of oxytocin on pituitary-thyroid function in vivo. Acta physiol. acad. sci. Hung. 25 no.1:39-45 164. 1. Institute of Physiology, 1)"niveraity Medical School, Pecs. VERTES3, Peter; M. KOVACS, Laszlo; SZEGHO, Laszlo; VIGASSY, Jozoef Testing abosorption and fission conditions of heterogeneous uranium-vater systems in the epthermal neutron energy range. Koz fix kozl MTA 12 no.4s263-285 164. 1. Central Research Institute of Physics, Hungarian Academy of Sciences,, Budapest. VICRTGEYN. B.A. (Molotov) -_ Conditions for the appearance of convection In a binar7 mixture. Prikl.mat.i mekh. 19 no.6:745-750 N-D '55. NLRA 9:3) (Heat--convection) Vort-cs, E. 113ha-1cospearo, the Dritioli Ralio, anfl .'-IcCar"'hy." 1). 1). ('Aapyar ik:1112. Vol. 9, no. 25, Juno 191ij, 3u+ SO: ~Ionthly List of Sast Euro%ec-m Accas-Ions, Vol. 2, lio.'q, Library of :;on,, es:, Septe-,iber 195), Uncl. -IMTES' F-.- - - Magyar Textiltechnika - No. 4, Apr. 1955 Development of the cotton industry :in the ten years since the liberation. p. 122 SO: Honth3,y list of East European Accessions, (EFAL), LG, Vol. 4, No- 9, Sept- 1955 Uncl. 10,71. m 0"'~~ '(p"I ,YP7' .17 11 -ilo) - _ . t~ d, i.1 Y.P,. LUMKY, Sandorp ch-... oklevelee-mernokj -adjUWAtuo; N*WHp Patencp dr.,. okleveles mernokj, adjunktus; ROLLEP~ Bela, dr., okluveles mernok,j adjunktus; Y7ERTES, Gyorgy,, dr.,, okleveles-msrnokv~adjunktua Mz~ll-structurwL foundations, Melyepitestud ozemle 13 =.2/3: 12N-1257-Mr 163* 1. Epitoipari es Kozlekedesi Muszaki Egyetem Mechanikai Tanazeke,, Budapest. BERECZ, Endre, VERTES, Gyorgy Viscosizetry of three-component solution systemn. Magy kem folyolr 70 no.3%106-12.3 Mr 164. 1. Chair of Physicochemistry and Radiology, Lorand Eotvos University, Budapest, and Electrochemical Research Group, Hungarian Academy of Sciancon. VERTF.S. Gyorgy; NAGY, Ferenc Determination of the solubility and diffusion constant of hydrogen in aqueous solutions. Magy kem folyoir 66 no.11: 450-452 N 160. 1. Magyar Tudomanyon Akademia Kozponti. KemiaiiNutato Intezate, Budaposto NAGY, Ferenc; IIORAXI, Gyorgy; )PIT),Z, Aysrgy, Diffusion current of hydrogen on the rotary platinum elocitro- do. II. Determination of the number of active centers. Magy kek folyoir 68 no.5:202-205 My 162. lo Magyar Tudomanyos Akademia Kozponti Kemiai Kutato Intezet, Budapest. VERTES, Crr; Kt)T-TAR, T- Effect of vibrptions on buildin.Cs end hmrnr~n bPirC-. 1p. 170. ~ -1 P'j-..GYP.R EPITOIFAR. (Epitoinr-ri TuOomrinvos 7,--trpsulet) 1~1.dapest, ',,!unrrrv, Vol. 7, no. 8/ i958. Monthly List of East &iropepn Accessions (EE.AI) W, Vol. 8, no. 7, July 195'?. UINCL VERTES, 1. On ncw ways. p. 8. REFULES, Vol. 8, No. 8, MaY 1555- (11agryar Onkentes Honvedeirni Szovetseg) Budapest KURCE: EASOT ELWPW ACC-.-,-~%IONS LIST Vol. 5, No. 1 Eepteriber, 1956 VERTFIS, Iotvan, okleveles gepeszmemok WAMOMMU40M flew type denaators with stuffing boxes for hot-water and steam distance heating systema. Energia on atom 16 na.6.20'1~-271 je 163. 1. WLYEPTERV. VERTES, Istvat- Long-distance beat supply of the Zobak Shaft in Komlo. Epu- lotgepeezet 12 no.6t2lC-216 D'63- 14UIMM, A,; BIRO) N, A*; VERTES, K. Binding of Ca and Mg by functional structural proteins of muscle. Acta physiol. akad. sci. hung. 21 no.1:15-28 162. 1. Biochemistry Group, Institute of Phylogeny and Genetics, EotVos Lorand University, Budapest. (MUSCLE PROTEINS chemistry) (CALCIUM ohemistry) (MAGNESIUM chemistry) KRETZOI, M.; VERTES, L. Excavations of the Mindelian (Bihar stage) settelement of the prehistoric man in Jertesszollos. Acta geol nungA no.1/4: 313-317 164. 1. Ungarische Geologische Anstalt, B-adape3t (for Kre tzol). 2. Ungarische National Museum, Budapest (for Vertes). VERTRS, L. VERTESj L. Some problems of publishing technical books on planned enonorV. p. 27. Vol. 10, no. 6$ June 1956 TOBBTERMELES Budapest., Hungary So: East European Accessionp Vol, 6, No* 5j May 1957 VE',,TZc-", L. Res-rve- of ?roduci,4 n; P. 1"'I" G. A. Purdenskii's In-er - JAR~U.-IFir, IM FTEX. '-~Uj-lnest. ,'In .3 ',o. 9, se-,-t. 19C6. OGAZDASAGI G 'I. . 2 1 SOURCE: East Furopean Aceassi,Dns Ust Library of Co-Eress Vol.5),, No. 12, Deceyriber 1-956 Vill, -Fill-, Gyorr.V C_-Iatarls and Ff_-renc !-_un*~"'tllfir 0,; (Problems of i~s anl ':ol'lII ':ormr,); a oolk r,~vi~.,v. p.(3i) of cover. P JAR'IPPEF MEZOGA 'Z' D.~ SA C, i TIU6,auest- TA. 3, !',0. 9, Sent- ITC. '7C _)UrRCZ: East B.,ropean Accessions List, (E-AL), Librnr., of ConF-r(-_-_-s _5, I'o. 12', December 1956 Vol. V ERTE-Z, L. Publication of Raktarozas es Anyagkezeles (Storing and Maintenance of Materials); a book revie-w,, P. 306p GEP ('Jepipari Tudomanyos Egyesulet) Budapest,, Val. 8.. No. 8,Aug. 1956 SOURCE: East European Accessions List (EEAL) Library of Congress,, Vol. 5, No. 11, Navember-1956 VEIITE,S, L. VERTES, L. Remarks on the article "by Comrade I-aszio Kardos in FAIPAR, v. 4, no. 10 P. 372. Vol. 4, no. 12, Dec. 1954. FAIIIAR. .5u&r.-est, Ijungary. 6C-URCE: East Eurakean Accessions List (E-E-AL) Vol. 6, No. 4--April 1957 Reduced use of imported goods. P- 40. TOBBTERMFIES. (Uzemi Tervgazdasagi es Szervezesi Tudomanyos Egyesulet) Budapest. Vol. 10, no. 5, :,:ay 1956. SCURCES: FEAL - LC Oct. 1956. Vol. 5 No. 10 V!HItT--S) L. Cyorgy Gerle's BervYp2,qsoV. (~.corcmic-T-chni of Invostmenu,); b-.~ review. P. 397. Vol. 11"'0. 1C, Oct. C. T,1p. TECF,b:C LOCY Eudapest, Fungary So: Fast Eumpean Accession,, Vol. 5, No. 5, 1,11ay 1956 Conditions of the Hungarian interstadial Wurn I/II elucidated by the exanination of the filing of grottoes,. In French., p. 393,v ACTA GEOLOGICA, (Magyar Tudomanyos Akademia) Budapest., Vol. 3, No. 4s 1955 SOURCE: East European Accessions List (EEAL) Library of Congress, Vol. 4.0 No. 12, December 1955 - - VERT ES, L. Wurmian dye mine in Lovas, near Lake Balaton. P-390 Vol. 85, no. 3. July/Sept. 1955 SOURCE: MontVY list of East European Accessions, (EEAL), Lc, Vol. 5, No.1 March 1956 VEITRITES $ L. "Socialist Gontracts" . Y. 39. (TCI---,37EFJ --IFS, Vol. 7, -o. 11 , Jan. 1353, aidapest . .9 1,ur~ary) SO: Eon,-Ily List of East Europ-can Accessions, (MIL), LC, "cl. 4, Ijo. 1, Jan. 1955, Uncl. 7EP.7-7-sp L. 11'elork of T(,,rvaazdas-tgi Korr-klado lubli-shers", F. 33. Vol. 8, Ilo. ~',, Au,,-. Ic-54, 2-itriarest, !Tijnr,-Br.,;r) SO& I'orthly List of Fast Evrorcan Accessions, (-t'7.AL), Lr,, Vol. 4, IT 11o. 1, Jr-n. 1955, T.Tncl. T~11_1 F J, 11. Andor Gentign A rruholyek to IIMU7-yi m, ~mvg,!t,~rycl Navz_,"= -2radu-tl - w-~, - rnnl c- s i I Labor, and "aterials of Workshon7,) * a 11-look review. p. (3) o" cover. 7 No. 20, Oct. 1955. * MUSZAKI 71'.T. Budapest, Hungary. So: !astern European Accession. Vol 5, no. 4, April 1?56 T---RT-r,S, L. VaIJAJAU terveZes az inarban. I. IJ. (Plannins, in Industrial EnteMrjAes V-. 1-.21; a bookieview. P. 356. 1 ~~ Vol 2, no. 12, Dec. 1955, JAMIUVEK MEZOGAZDASAGI GEPEK. Budapest, Hungary. So: Eastern European Acce~-sion. Vol 5, no. 4, April 3$56 "Plarming and Organizational Work in Industrial Associations." p. 38 (Tobbtemeles. Vol . 7 no. 12, Dec. 1953 Budapest.) SO: �onthly ast S-r9mo- Vol. 3o no. 6 -Arm Poiona./Ubr=7 of Congress,__~Lune 1954, UncL _4st of F ie 0 0 0 a 0 0 0 0 9 0 0 0 0 O-OF-0--ir oooooo:::::: 0 0000000000000000900,0ooooosee 0 :00060 I Wit 1 4 39 It III a w If : v:bIa4IQ44I 0!111 cm AV s Ts 0 PU 0 1 T IN TZ # I I - - . . I . . -k- -L- A -.*-I- A0 -!! - - - '.. . - ._'i . 111 A 400 10 ~000009n)-' lip oil 0 0 1! 0 *IF 00 noo r: p 00 30i4l .7 1!1 000 0 0:! 160 oo~. 00 ZT-TT *01 00- go of. OG6,1- IW=O dD TyXmr 00 00- F 00- 00 00 00- 17 00.1 r 00 roo 0o-- .6 00 -4.M.0 O~t 4.. Its r00 X WN W-7--r-T-4-V-n T-5--i-ir -w- T n IT If It Pit% m&nj#4&4Aij P& 14 0 00 0 0 0 0 i0,9& 4's0 00 0 0 0 e . I * - . I fik S a rlyalcls, a-,;a VE"rTZ"'j, "/-nxiottta c-' tb#o ini'All"wAi I'ayniciojc; ril 1-i' y),-.r ~~ a tin K,~divr-! "The Elfent of Hyl~oth.~Iur~,ijx LiaAil-,xi la~ tlAij of Tbyroid Ry,,iolog,m rtlele; autriorn, EnzMsh Awmary "-La raalo aroino -len 1~ l. - j of in Mltferent -re- ot xne t4qrold g3xv-1 bc-r~a n U.) I N~d-rIt-was estat'livIx-a -'v-':;Lat Ir.6ion qllct~1~3 it tbzt tho p%raven1lrioular niacloi strol-,Ay ir.- fonation ot iodlno-131-nnaolo-Jo- i~~A AL yr,:~Slnrle 'IA . ~~ I- ~ r, X . r,;C ani of -1:1-na-132--thYroy ~-zne- Tho .. y e 7~otw--ti= of v,-,c roch D~evter. Thirtoqa refe- vrice's, tn,~Iudlzlg ',-, Rollaw,isa and U woutorl. KOVACSy S.; VERTES, Zsuzsa; SANDOR, A.; VMES, Marietta. The effect of mesencephalic lesions and stimulation on pituitary thyroid function. Acts. physiol. acad. soi. [lung. 26 no.3t227-233 165. 1. Institute of Physiology, University Medical School, Pecs. 3/058/6a/000/003/029/092 P6/0 A061IA101 AUTHOR: V6rtes, P. TITLE: On theineutral decay products of muons PERIODICAL: Referativnyy zhurnal, Fizlka, no. 3, 1S62, 18, abstract 3B186 ("Acta phys. Acad. scient. hung.", 1960, v. 12, no. 3, 249 - 252, English) T Possible experiments permitting a choice to be made between theories involving two.different neutrinos and one neutrino are considered. The following three processes, which take place only if the neutrino from/L-decay is identical with that originating from I'l-decay, are evaluated: a) the neutrino flux from/e- decay induces V-decay; b) the reactions tL + n -> p + e + e + ~V and /e + n ---), --~,p + e+ + e- + V, which may take place in free muons nucleon collision; c) cap- tures /tt_ + n --> p + e- + e - + v and 147 + p ---). nin /.4-mesonic atom Cecay. [Abstracterfs note: Complete translation] ,Card 1/1 3/058/62/000/010/003/093 A061AI02 AUTHOR: V6rtes,, P. TITLE:: On the K-mesonic interaction of muons PERIODICAL: Referativnyy zhurnal, Fizika, no. 10, 1962, 46, abstract 1OA438 CActa phys. Acad. scient. hung.", 1961, V. 13, no. 3, 341 343, English) TEXT: In the model considered the muonic mass source is the vector and gradient interaction of muons with K-mesons with a coupling constant g=,/M2 (M being the K-mesonic mass). The theory is non-renormalizable. The cut-off is chosen such that the correction for the muonic mash is of the same order as the mass itself. T e correction for the magnetic moment of the muon is estimated as equaling 8-10-~of muonic magne'ton, and the corkection for the K-mesonic masp as (6-14/'M)2 = -102. Ya- Azimov rAbstracter's note: Complete translation] Card 1/1 23976 H/006/61/014/006/002/003 B122/B227 AUTHORSs Bata, Lajos and Veirtes, Ater (see Association) TITLEs Measurement of reactor parameters III PERIODICAL: Energia 6s Atomtechnika, v. 14, no. 6, 1961, 274 - 283 TEXTt This is the third of a series of articles (Bata Lajos: Energia &s Atomtechnika, v. 13, no. 10 - 11, 490 - 495, 19601 v. 14, no. 1, 32 - 39, 1961) published by the authors. The subject of this paper is the deter- mination of critical reactor dimensions by the 1) start-up and by the 2) exponential experiment. 1) For the authors, the start-up experiment was of greater importance. This consists of the measurement of multiplication and is suited for small-size, water-solution enriched reactors. The reactor of the Central Physical Research Institute of the type UPC (VVRS) supplied by the Soviet Union, is of such water-cooled, water-moderated, water-reflected, enriched-fuel type. The authors bui t up a sub-critical system and placed a thermal plane source (Cd) of 5-10 neutrons/sec strength in the middle of it to serve as a negative source. Keeping the prescribed fuelimoderator ratio, they placed the clusters of fuel elements into t e prearranged grid until the critical level was approached. Card V4 2 976 EP008/61/014/006/002/003 Measurement of reactor... B122/B227 Neutrons of the primary source undergo multiplication, and the neutron flux increases at every point. The ratio of the flux produced by fission and of that due to the primary source is called local multiplication. The reciprocal of this value versus the number of clusters is graphed, and the curve becomes zero at number 22.5 1 0-53 the system becomes here critical. The corresponding mass is 2816