<p> ISSN 1313-7735</p><p>RESEARCH PEOPLE AND ACTUAL TASKS ON MULTIDISCIPLINARY SCIENCES</p><p>Proceedings of the Second International Conference </p><p>Publisher</p><p>Bulgarian National Multidisciplinary Scientific Network of the Professional Society for Research work</p><p>Volume 2</p><p>LOZENEC, BULGARIA 10– 12 JUNE, 2009 </p><p>RESEARCH PEOPLE AND ACTUAL TASKS ON MULTIDISCIPLINARY SCIENCES</p><p>Second Conference</p><p>Publisher</p><p>Bulgarian National Multidisciplinary Scientific Network of the Professional Society for Research Work</p><p> with the support of</p><p>Bulgarian National Society of Agricultural Engineers “Engineering and Research for Agriculture” “Angel Kunchev” University of Rousse, Bulgaria National Institute of Research-Development for Machines and Installations Designed to Agriculture and Food Industry, Bucharest, Romania University of Agricultural Sciences and Veterinary Medicine of Banat Timişoara, Faculty of Zootechny and Biotechnology, Romania Society “ECOLOGICA”, Belgrade, Serbia </p><p>Volume 2 Technical sciences Processing & Post Harvest Technology and Logistics, Power and machinery Physics, Chemistry, Biology</p><p>LOZENEC, BULGARIA 10– 12 JUNE, 2009 Organizing Committee</p><p>Atanasov Atanas, Bulgaria - Editor in Chief Mihailov Nikolay, Bulgaria Vezirov Chavdar, Bulgaria Kolev Rumen, Bulgaria Bikic Sinisa, Serbia Vlăduţ Valentin, Romania Kolev Bozidar, Bulgaria Dochev Veselin, Bulgaria Bungescu Sorin, Romania Knežević Dario, Croatia Sandric Maria, Romania </p><p>International Scientific Committee</p><p>Vezirov Chavdar, Bulgaria Banaj Đuro, Croatia Paradjikovic Nada, Croatia Vulkov Lubin, Bulgaria Inoue Keiichi, Japan Vlăduţ Valentin, Romania Martinov Milan, Serbia Popescu Simion, Romania Bilalis Dimitrios, Greece Fröba Norbert, Germany Borisov Boris, Bulgaria Perković Anica, Croatia Zheliazkova Irina, Bulgaria Bungescu Sorin, Romania Kaya Yalcin, Turkey Jovanović Larisa, Serbia</p><p>ISSN 1313-7735</p><p>Printed in Bulgaria Printing House “Angel Kunchev” University of Rousse 8, Studentska Street, 7017 Rousse, Bulgaria PREFACE</p><p>Dear Colleagues! The International Scientific Conference ““Research People and Actual Tasks on Multidisciplinary Sciences” is second International Conference organized in Bulgaria with basic purpose to create the framework for the presentation, debate and publication of the valuable scientific results obtained by both the young members. United by the idea of Multidisciplinary Sciences, the researchers and faculty will report the results of their research. Thus, the scientists will contribute is to promote exchange of research results, scientific ideas and their practical implementation and development work in the various disciplines. We hope this meeting will initiate new joint research projects, new friendships. We owe special thanks to all participants, and especially to the supporting organizations.</p><p>Chief Editor Dr. Eng. Atanas Atanasov CONTENTS VOLUME 2 Technical sciences, Processing & Post Harvest Technology and Logistics, Power and machinery, Physics, Chemistry, Biology</p><p>1. CONTRIBUTIONS REGARDING THE THEORETICAL AND EXPERIMENTAL RESEARCH ON THE DYNAMICS AND ENERGETICS OF THE TRACTOR - HARVESTING MACHINE SYSTEMS S. Popescu, E. Voicu, T. A. Ene………………………………………………………….1</p><p>2. THEORETICAL AND EXPERIMENTAL RESEARCH ON THE CRUSHING RESISTANCE OF WHEAT USED IN BAKING INDUSTRY Mirabela I. Lupu…………………………………………………………………………….6</p><p>3. ASPECTS REGARDING THE IMPACT ENERGY ABSORBED BY POTATOES IN MECHANIZED OPERATIONS D.M. Dănilă, L. Gaceu…………………………………………………………………...11</p><p>4. MODELLED THE STRUCTURAL CHANGES AT THE FROZEN TISSUES USED THE VORONOI DIAGRAM Mihaela Gabriela Chirila…………………………………………………………………15</p><p>5. THEORETICAL RESEARCHES THROUGH SIMULATION COMPUTER- ASSISTED ABOUT THE KINEMATICS OF THE MECHANISMS CAM-BALANCE LEVER TYPE F. Loghin…………………………………………………………………………………..19</p><p>6. INVESTIGATION OF PERIODIC SOLUTIONS FOR A CLASS OF NONLINEAR OSCILLATORS N. Herişanu and V. Marinca…………………………………………………………….24</p><p>7. OPTIMAL ITERATION PROCEDURE FOR CONSTRUCTION OF PERIODIC SOLUTIONS OF NONLINEAR OSCILLATORS V. Marinca and N. Herişanu……………………………………………………………..29</p><p>8. STUDIES AND RESEARCHES ON SPECIAL CROP MACHINES Mariana Dumitru………………………………………………………………………….34</p><p>9. RESEARCHES ON FUNCTIONING OF MACHINES FOR CHEMICAL APPLICATION Mariana Dumitru………………………………………………………………………….38</p><p>10.THE EFFECT OF REFRIGERATION STORAGE CONDITIONS ON SOME PHYSICAL AND SENSORIAL CHARACTERISTICS OF APPLES Mirela Calu, Camelia Bonciu, Gabriela Iordachescu, Ioan Tofan...... 43 11.ASPECTS REGARDING THE PRESERVATION OF THE SOIL FEATURE THROUGH THE RATIONALIZATION HIS BASIC WORKS I. Căpăţînă, Gh. Brătucu………………………………………………………………...48</p><p>12.RESEARCHES ON NON CONVENTIONAL HEATING METHODS USED FOR LIQUID FOOD PASTEURIZATION/STERILIZATION Andreea-Manuela Constantin, Mihaela Danciu...... 53</p><p>13.SOME CONSIDERATIONS ON THE STUDY OF PLANSIFTER MOTION USED FOR GRAIN MILLING SEPARATION N. Orasanu, Gh. Voicu…………………………………………………………………..58</p><p>14.SOME CONSIDERATIONS ABOUT THE STUDY OF PARTICLES MOTION ON THE PLAN SIEVE WITH A CIRCULAR MOTION Gh. Voicu, N. Orasanu…………………………………………………………………..63 </p><p>15.NEW PROPOSAL OF ADAPTIVE WING FOR MODERN AIRCRAFTS C. Niculiţă, I. Cândea and A. Bencze…………………………………………………...68</p><p>16.RESEARCHES OF THE EFFECT OF FAN OF THE MACHINES FOR ADMINISTERED FERTILIZERS MINERALS THROUGH CENTRIFUGAL ACTION Hodîrnău Marius………………………………………………………………………….73</p><p>17.RESEARCHES CONCERNING THE MECHANIC OSCILLATORY AMPLITUDE VARIATION EFFECT IN THE ALCOHOL MATURATION PROCESS M. Purcaru, A.M. Constantin…………………………………………………………….77</p><p>18.RESEARCHES TO USED OF THE ULTRASOUNDS IN THE FOOD INDUSTRY I. R. Şugar, A. Mihaly Cozmuţa, M. Oşan……………………………………………..83</p><p>19.TENDENCIES REGARDING AUTOMATION AND MONITORING OF TECHNOLOGY IN WINEMAKING PROCESS V. Padureanu, C.M. Bica………………………………………………………………...87 20.THEORETICAL RESEARCHES INTO BEER PASTEURIZATION V. Padureanu, M. I. Lupu...... 92</p><p>21.CONTRIBUTIONS TO THE THEORETICAL STUDY OF THE PRECISION SOWING MACHINES DYNAMICS S. O. Opris and S. Popescu…………………………………………………………….97</p><p>22.NECESSARY POWER FOR OIL PRESSES DRIVE S.Şt. Biriş, M. Manea, N. Ungureanu, M. Tudosie, V. Vlăduţ……………………...102</p><p>23.THE INFLUENCE OF CROP AND MACHINE IN MECHANIZED HARVESTING OF GRAPES I. Baisan…………………………………………………………………………………108</p><p>24.RESEARCHES ABOUT PHYSICAL- MECHANICAL CHARACTERISTICS OF GRAPES I. Baisan………………………………………………………………………………...112</p><p>25.RESEARCHES REGARDING THE MODERNIZATION OF FODDER DISTRIBUTING TECHNOLOGY FOR CATTLE Ancuta Nedelcu, Iosif Cojocaru, Radu Ciuperca, Lucretia Popa…………………..116</p><p>26.ISSUES ON HACCP SYSTEM IN WINE ENTERPRISES C. M. Bica, V. Padureanu...... 121 </p><p>27.DETERMINING THE MAXIMAL DIMENSIONS OF PUSHED COMPOSITIONS AND DRIFT ANGLE IN RIVER BENDS UNDER THE INFLUENCE OF HYDRODYNAMIC FORCES Vladimir Škiljaica, Todor Bačkalić, Ivan Škiljaica……………………………………126</p><p>28.INSPECTION WITH INFRARED THERMOGRAPHY OF COMPOSITE MATERIALS USING PULSE METHOD Andreea Borîtu, Viorel Anghel, Nicolae Constantin, Mircea Găvan, Dragoş Tănase, Dan Codruţ...... 132</p><p>29.SOME ASPECTS CONCERNING THE DECREASE OF THE NOISE GENERATED BY THE CONTACT BETWEEN THE TIRE AND THE ROAD V.Bacria, N.Herişanu……………………………………………………………………137</p><p>30.THE ANALYSIS OF LUBRICANTS WHICH CAN BE USED IN AGRICULTURE AND FOOD INDUSTRY. THE DEVELOPMENT OF SOME BIODEGRADABLE LUBRICANTS Vlăduţ V., Matache M., Bungescu S., Biriş S., Paraschiv G., Atanasov At………143</p><p>31.VERIFICATION THE EQUIPMENT TO COMBAT PESTS AND DISEASES IN ROMANIA IN ORDER TO ELIMINATE ENVIRONMENTAL POLLUTION WITH TOXIC SUBSTANCES S.T. Bungescu*, W. Sthali*, V. Vlăduţ**, S.S. Biriş***, M.E. Nagy**** T. Iancu*…....154 </p><p>32.TECHNICAL REQUIREMENTS FOR THE ELECTRICAL APPARATUS INTENDED FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST GENERATED BY THE GRINDING OF CEREALS T. Csaszar, E. Ghicioi, S. Burian, M. Părăian……………………………………….164</p><p>33.NEW APPROACHES IN THE CLEANING OF INDUSTRIAL AND HOUSE WASTE WATERS L. Toth, M. Kovacs, A. Drăghici…………………………………………………….....169</p><p>34.IMPORTANCE OF THE EXPLOSIVITY COMBUSTIBLE DUSTS CHARACTERISTICS FOR ASSESMENT EXPLOSION RISK AT THE STORAGE AND HANDLING OF CEREALS Mihaela Păraian, Emilian Ghicioi, Florin Adrian Păun, Adrian Jurca, Niculina Vătavu, Leonard Lupu ……………………………………………….……..174</p><p>35.PROMOTING SAFE CONDITIONS IN RELATION TO FIRES AND EXPLOSIONS DURING THE USE, TRANSPORTATION AND PROCESSING OF VEGETABLE POWDERS O. Baron, N. Mija, C. Knebel, I. Krausz şi A. Szöllösi-Moţa……………………....178</p><p>36.Ex GUIDE UNCERTAINTY OF MEASUREMENT Burian Sorin, Ionescu Jeana, Csaszar Tiberiu, Darie Marius...... 182 37.ASPECTS REGARDING THE MARKETING OF METHANE FROM THE COAL MINES AS AN ALTERNATE POWER GENERATING SOURCE C. Lupu, I. Toth, C. Tomescu, E. Chiuzan, D. Tamaş……………………………..186</p><p>38.VALIDATION OF THE GAS-CHROMATOGRAPHIC METHOD USED TO DETERMINE THE CHEMICAL COMPOSITION OF MINE AIR Andrei Szöllösi-Moţa, Octavia Baron, Lorand Toth, Iuliu Krausz, Cristina Knebel………………………………………………………………………….192 </p><p>39.PREVENTING THE OCCURENCE OF SPONTANEOUS COMBUSTIONS IN HARD COAL MINES BY THE HELP OF ZINC CHLORIDE SPRAYED PARTICLES I. Toth, C. Lupu, D. Cioclea, E. Chiuzan, M. Morar, C. Tomescu…………………197</p><p>40.THE KINEMATICS A PRODUCION PROCESS WITH USING ON ROUND CUTTING ELEMENT Ivaylo Kirilov Аngelov………………………………………………………………..….203</p><p>41.A FEW ASPECTS ABOUT IMPROVING THE THERMAL BEHAVIOUR OF LOW VOLTAGE DISK ZNO BASED VARISTORS M. Frigura-Iliasa, F.M. Frigura-Iliasa…………………………..……………………..207</p><p>42.A NEW CONFIGURATION FOR HIGH ENERGY Low Voltage disk ZnO Based Varistors M. Frigura-Iliasa, F.M. Frigura-Iliasa…………………………………………………216</p><p>43.STUDIES REGARDING THE MODELLING OF COAGULATION-SETTLING PROCESS IN THE CASE OF FILTERS WASHING WATER AND SETTLING TANK SLUDGE RECYCLING Giannin Mosoarca………………………………………………………………….…..225</p><p>44.MATHEMATICAL MODELLING OF FERMENTATION IN OBTAINING PROCESS OF THE RYE BREAD WITH 25 % WHEAT FLOUR Anca Mihaly Cozmuta, Radu Sugar, Flavia Pop…………………………………….230</p><p>45.CHARACTERIZATION OF ANTHOCYANINS FROM ROSA CANINA L. FRUITS FROM BANAT REGION, ROMANIA A. Căta, M.N. Ştefănuţ, I. Ienaşcu…………………………………………………….234</p><p>46.STUDIES REGARDING THE EVOLUTION OF THE INFECTIONS CAUSED BY THE RESISTANT BACTERIA AND THE WAY THEY CAN BE COMBATED C.Rusu, C Tofan, E.O.Constantin...... 239</p><p>47.DETERMINATION OF ASCORBIC ACID CONTENT FROM THE ALCHEMILLA VULGARIS, ALLIUM URSINUM, ACORUS CALAMUS, SOLIDAGO VIRGA-AUREA SPECIES USING THE 2,6-DICHLOROPHENOL-INDOPHENOL ANALYSIS METHOD Dumitru Condrat, Florian Harja, Alfa Xenia Lupea………………………………….244</p><p>48.DETERMINATION OF TOTAL ANTHOCYANIDINS CONTENT FROM THE AGRIMONIA EUPATORIA, VERONICA OFFICINALIS AND VISCUM ALBUM SPECIES Dumitru Condrat, Florian Harja, Alfa Xenia Lupea………………………………….247 49.RESEARCHES CONCERNING THE HISTAMINE CONTENT OF WINES WITH MALOLACTIC FERMENTATION Ionel Popescu Mitroi...... 250</p><p>50.EFFECT OF BIOCIDES ON PSEUDOMONAS FLUORESCENS AND BACILLUS CEREUS BIOFILMS FORMED ON STAINLESS STEEL SURFACES O. Constantin, C. Tofan…………………………………………..………………..….255</p><p>51.THE MICROBIOLOGICAL ASSESSMENT OF SOME WATERY PROPOLIS EXTRACTS – I Ramona Cristina Biron, Gabriel Heghedűş-Mîndru, Ionel Vasile Jianu, Teodor Ioan Traşcă , Călin Jianu, Ducu Sandu Ştef …………………………..….260</p><p>52.THE MICROBIOLOGICAL ASSESSMENT OF SOME WATERY PROPOLIS EXTRACTS – II Ramona Cristina Biron, Gabriel Heghedűş-Mîndru, Ionel Vasile Jianu, Teodor Ioan Traşcă , Călin Jianu, Ducu Sandu Ştef...... 264 </p><p>53.THE USE OF SOME PLANT EXTRACTS TO OBTAIN HYPOGLYCEMIC PRODUCTS Teodora Balaci, Victoria Hîrjău, Dumitru Lupuleasa, Mircea Hîrjău, Anca Nicoară, Ancuţa Fiţa, Emma Cretu...... 269</p><p>54.THE USE OF HIPPOPHAE RHAMNOIDES OIL IN THE MANUFACTURE OF SOME PHARMACEUTICAL PREPARATIONS FOR ORAL AND TOPICAL ADMINISTRATION Anca Nicoară, Teodora Balaci, Ancuţa Fiţa, Mirela Mitu, Oana Mănescu, Andreea Stănescu………………………………………………………………………274</p><p>55.CHARACTERIZATION OF ASPARTIL PROTEASE FROM Penicillium roqueforti PRODUCED ON PUMPKIN OIL CAKE Senka Popović, Žužana Vaštag, Ljiljana Popović, Vera Krimer, Draginja Peričin………………………………………………………………………….279</p><p>56.HYDROLYSIS OF PUMPKIN OIL CAKE PROTEIN ISOLATE BY ASPERGILLOPEPSIN I Žužana Vaštag, Senka Popović, Ljiljana Popović, Vera Krimer, Draginja Peričin…………………………………………….………………………...…285</p><p>57.MICROBIOLOGICAL QUALITY OF PASTRY PRODUCTS C. Vişan, R. Segal...... 292</p><p>58.KINETIC CHARACTERIZATION OF Aspergillopepsin I USING PROTEIN ISOLATE FROM PUMPKIN OIL CAKE AS SUBSTRATE Lj. Radulović-Popović, S. Popović, Ž. Vaštag, V. Krimer, D. Peričin………………295</p><p>59.BIOCHEMICAL ASSESSMENT OF SOMATIC VARIABILITY INDUCED IN SOME PLANT SPECIES WITH HYPOGLYCEMIC EFFECT D. Botau, I. Ianculov, S. Ciulca, M. Cucu, A. Lazar, V. Bolda...... 300</p><p>60.THE OCCURRENCE AND TOXICITY OF FOOD BIOLOGICAL ACTIVE AMINES Octavian Baston, Octavian Barna…………………………………………………….306 61.COLD STABILISATION OF WINE IN FOOD INDUSTRY Georgeta Enache and I. Tofan…………………………………………………………312 </p><p>62.NEW PRODUCTS FROM SUGAR Octavian Barna, Romulus Marian Burluc, Octavian Baston……………………...319</p><p>63.AUTOMATIC METHOD FOR ACQUISITION AND PROCESSING THE EXPERIMENTALLY RESULTS FROM THE MACHINES FOR SPARS CHEMICAL SOLID SUBSTANCES Gh. Bratucu ……………………………………………………………………………..324</p>