MEMBRIAlexandru T. BALABANTexas A&M University at Galveston, SUAIon BOLOCANUniversitatea Petrol Gaze PloieºtiMiron Teodor CÃPROIUInstitutul de Chimie Organicã “C.D. Neniþescu” BucureºtiAndrei F. DÃNEÞUniversitatea BucureºtiCorneliu Mircea DAVIDESCUUniversitatea Politehnica TimiºoaraLaurenþiu FILIPESCUUniversitatea Politehnica BucureºtiIonel HAIDUCAcademia RomânãValeriu V. JINESCUUniversitatea Politehnica BucureºtiJiri KLEMENSUniversity of Pannonia Veszprém UngariaJean-Marie LEHNUniversité Louis Pasteur, Strasbourg, FranþaAngela LUPUUniversitatea Politehnica BucureºtiIonel MANGALAGIUUniversitatea Alexandru Ioan Cuza IasiGheorghe MARIAUniversitatea Politehnica BucureºtiGheorghe D. MATEESCUCase Western Reserve University, Cleveland SUALucian MOÞIUAGER Consulting SRLMircea MRACECInstitutul de Chimie Timiºoara al Academiei RomâneMargareta NICOLAUECOIND Bucureºti

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Bucharest - RomaniaChem. Abs.: RCBUAU 64 (7) (673-784)

ISSN 0034-7752Vol. 64, no. 7, July, 2013

CONTENTS

Iulia Varzaru, Arabela Elena Untea, T. Martura, Margareta Olteanu, Tatiana Dumitra Panaite, Maria Schitea, Ilie VanDevelopment and Validation of an RP-HPLC Method for Methionine, Cystine and Lysine Separationand Determination in Corn Samples...........................................................................................................................................................673Liliana Pacurariu, Mariana Mateescu, P. Szczepanski, V. Danciulescu, Aurelia Cristina NechiforRemoval of Cr3+ from Waste Solution by a Bulk Liquid Membrane and Ion-exchange Membrane Nafion 117.........................................680Mariana-Nicoleta Badea, Elena Diacu, Violeta-Monica RaduInfluence of Antibiotics on Cooper Uptake by Plants..................................................................................................................................684Adriana Jung, H. Jung, Daniela Lucia MunteanGas-chromatographic Method for Volatile Congeners in Alcoholic Beverages Analysis ...........................................................................688Ioana Csaki, Gabriela Popescu, R. StefanoiuIn Situ Reaction Influence on Hybrid Aluminium/Titan Aluminide and Alumina Composite Hardness.....................................................693N. C. Lungu, I. Sandu, P. Chirita, M. L. BirsaNew Water Soluble 1,3-Dithiolium Salts.....................................................................................................................................................697L. Birzan, Victorita Tecuceanu, C. Enache, Al. C. RazusFragmentation in Mass Spectrometer of Some Phenylselanylated Azulenes and of the CorrespondingSelenoxides and Selenones........................................................................................................................................................................701J. Tong, Y. Chen, Shuling Liu, T. Che, X. XuA Novel 3D Molecular Structural Characterization Method Applied in QSAR Study ..................................................................................707Clara Matei, M. Tampa, Simona-Roxana Georgescu, T. Poteca, C. Sinescu, Fl. I. Topala, A. Halga, A. PodoleanuPlastinated Tissue Evaluation by Optical Coherence Tomography.............................................................................................................713Diana Mihaela Pindaru, C. Tanase, R. I. Olariu, Cecilia ArseneExtra and Intercellular Concentrations of Water Soluble Cations from Xanthoria parietina andPhaeophyscia orbicularis Lichenized Fungi Species..................................................................................................................................715Z. SarajanAl-Si Grain Refinement in Semisolid Processes.........................................................................................................................................720M. A. A. M. Salleh, A. M.M. Al Bakri, Flora Somidin, A. V. Sandu, Norainiza Saud, H. Kamaruddin,S. D. Mc. Donald, K. NogitaA Comparative Study of Solder Properties of Sn-0.7Cu Lead-Free Solder Fabricated viathe Powder Metallurgy and Casting Methods..............................................................................................................................................725Madalina Fleancu, Nicoleta Olteanu, Cosmina Andreea Lazar, Aurelia Meghea, Maria MihalyControlled Size Gold Nanoparticles Obtained by Tunning Synthesis Parameters in Microemulsion Templates........................................729Silvana Canjau, C. Sinescu, Carmen Todea, Fl. Topala, Laura Cristina Rusu, E. Gadea Paraschivescu, A. Gh. PodoleanuOptical Coherence Tomography as an Alternative Method for Excisional Biopsy in Oral Pathology..........................................................733Elena Ancuta Tulbure, I. G. Sandu, Gh. V. Atodiresei, I. SanduStudy of the Structure and Elasticity of Polyurethanic Yarns with Elastomeric Core...................................................................................736S. Petrescu, V. Maris, Monica Costea, N. Boriaru, Camelia Stanciu, I. DuraComparison between Fuel Cells and Heat Engines. I. A similar approach in the framework of thermodynamics with finite speed........739Alina Barbulescu, Lucica BarbesMathematical Models for Inorganic Pollutants in Constanta Area, Romania.............................................................................................747Cristiana Radulescu, Claudia Stihi, Lucica Barbes, A. Chilian, Daniela Elena ChelarescuStudies Concerning Heavy Metals Accumulation of Carduus nutans L. and Taraxacum officinale asPotential Soil Bioindicator Species.............................................................................................................................................................754Mioara Drobota, D. Gh. Dimitriu, Bogdana Simionescu, Irina Titorencu, Mihaela Olaru, Magdalena AfloriCytocompatibility of PET Films after DC Helium Plasma Treatments and Collagen Immobilization.........................................................761L. Ignat, Elena Gabriela Hitruc, Mariana PintealaEffects of N-hydroxysuccinimide Activation on the Surface and Bulk Properties of Polyurethanes Available for Bioconjugation.............766Silvia-Izabella Pop, M. Dudescu, Dana Cristina Bratu, R.-V. Pop, M. Petrisor, Mariana PacurarInfluence of the Chemical Composition on the Mechanical Properties of Orthodontic Archwires............................................................771Marcela Mihoc, Georgeta Pop, Ersilia Alexa, Diana Dem, Andrea MilitaruMicroelements Distribution in Whole Hempseeds(Cannabis Sativa L.) and in Their Fractions.................................................................776M. Apostu, Nela Bibire, Madalina Vieriu, Alina Diana Panainte, Gladiola TantaruPreparation and Potentiometric Study of Ranitidine Hydrochloride Selective Electrodes and Applications..............................................781

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CUPRINS

REVISTA DE CHIMIEBucuresti - România

Chem. Abs.: RCBUAU 64 (7) (673-784)ISSN 0034-7752

Vol. 64, nr. 7, iulie, 2013

Iulia Varzaru, Arabela Elena Untea, T. Martura, Margareta Olteanu, Tatiana Dumitra Panaite, Maria Schitea, Ilie VanDezvoltarea si validarea unei metode HPLC-RP pentru separarea si determinarea metioninei,cistinei si lizinei din boabe de porumb.......................................................................................................................................................673Liliana Pacurariu, Mariana Mateescu, P. Szczepanki, V. Danciulescu, Aurelia Cristina NechiforIndepartarea Cr3+ dintr-o solutie reziduala prin membrana lichida simpla si membrana schimbatoare de ioni Nafion 117...................680Mariana-Nicoleta Badea, Elena Diacu, Violeta-Monica RaduInfluenta antibioticelor asupra preluarii cuprului de catre plante..............................................................................................................684Adriana Jung, H. Jung, Daniela Lucia MunteanMetoda gaz-cromatografica pentru determinarea congenerilor volatili ai alcoolului etilic.......................................................................688Ioana Csaki, Gabriela Popescu, R. StefanoiuInfluenta reactiei in situ asupra duritatii compozitelor hibride de aluminiu/aluminura de titan si alumina...............................................693N. C. Lungu, I. Sandu, P. Chirita, M. L. BirsaNoi saruri de 1,3-ditioliu solubile in apa.....................................................................................................................................................697L. Birzan, Victorita Tecuceanu, C. Enache, Al. C. RazusFragmentarea in spectrometrul de masa a catorva azulene fenilselanilate si a selenoxizilor si selenonelor corespunzatoare ..............701J. Tong, Y. Chen, Shuling Liu, T. Che, X. XuO noua metoda 3D de caracterizare structural moleculara aplicata in studiul QSAR.............................................................................707Clara Matei, M. Tampa, Simona-Roxana Georgescu, T. Poteca, C. Sinescu, Fl. I. Topala, A. Halga, A. PodoleanuEvaluarea tesuturilor plastifiate prin tomografia de coerenta optica..........................................................................................................713Diana Mihaela Pindaru, C. Tanase, R. I. Olariu, Cecilia ArseneConcentratiile extra si intracelulare specifice cationilor solubili in apa din speciile de ciupercilichenizate Xanthoria parietina si Phaeophyscia orbicularis......................................................................................................................715Z. SarajanMicsorarea granulatiei de Al-Si in prelucrarea semisolidelor....................................................................................................................720M. A. A. M. Salleh, A. M.M. Al Bakri, Flora Somidin, A. V. Sandu, Norainiza Saud, H. Kamaruddin,S. D. Mc. Donald, K. NogitaUn studiu comparativ al proprietatilor de lipire a aliajului fara plumb Sn-0.7Cu fabricatprin metalurgia pulberilor si metode de turnare .......................................................................................................................................725Madalina Fleancu, Nicoleta Olteanu, Cosmina Andreea Lazar, Aurelia Meghea, Maria MihalyNanoparticule de aur cu dimensiune controlata obtinute prin varierea parametrilor de sinteza in Template de microemulsie..............729Silvana Canjau, C. Sinescu, Carmen Todea, Fl. Topala, Laura Cristina Rusu, E. Gadea Paraschivescu, A. Gh. PodoleanuTomografia coerentei optice ca metoda alternative pentru biopsia excisionala in patologia orala..........................................................733Elena Ancuta Tulbure, I. G. Sandu, Gh. V. Atodiresei, I. SanduStudiul structurii si elasticitatii firelor poliuretanice cu miez elastomeric.................................................................................................736S. Petrescu, V. Maris, Monica Costea, N. Boriaru, Camelia Stanciu, I. DuraComparatie intre masinile termice si pilele de combustie. I. O abordare similara in cadrul termodinamicii cu viteza finite..................739Alina Barbulescu, Lucica BarbesModele matematice pentru poluanti anorganici in zona Constanta Romania...........................................................................................747Cristiana Radulescu, Claudia Stihi, Lucica Barbes, A. Chilian, Daniela Elena ChelarescuStudii privinds acumularea de metale grele de catre speciile Carduus nutans L.si Taraxacum officinale ca potentiali bioindicatori ai solului.....................................................................................................................754Mioara Drobota, D. Gh. Dimitriu, Bogdana Simionescu, Irina Titorencu, Mihaela Olaru, Magdalena AfloriCitocompatibilitatea filmelor de polietilen tereftalat dupa tratamente in plasma de heliu in curent continuusi imobilizarea colagenului........................................................................................................................................................................761L. Ignat, Elena Gabriela Hitruc, Mariana PintealaEfecte ale activarii cu N-hidroxisuccinimida asupra proprietatilor de suprafata si in masaale poliuretanilor disponibili pentru bioconjugare......................................................................................................................................766Silvia-Izabella Pop, M. Dudescu, Dana Cristina Bratu, R.-V. Pop, M. Petrisor, Mariana PacurarInfluenta compozitiei chimice asupra proprietatilor mecanice ale arcurilor ortodontice........................................................................771Marcela Mihoc, Georgeta Pop, Ersilia Alexa, Diana Dem, Andrea MilitaruDistributia metalelor grele in semintele de canepa (Cannabis Sativa L.)…..............................................................................................776M. Apostu, Nela Bibire, Madalina Vieriu, Alina Diana Panainte, Gladiola TantaruConstructia si studiul potentiometric al unor electrozi selectivi pentru clorhidratul de ranititidina si aplicatii.........................................781