Research paper

DISTRIBUTION OF PHOSPHORUS FORMS IN “WATER-PARTICULATE MATERIALS-BOTTOM SEDIMENTS” SYSTEM OF THE PRUT RIVER DURING 2009-2012 YEARS

Author(s):

Larisa Postolachi, Vasile Rusu, Tudor Lupascu

Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 57-66

Keywords: bottom sediments, particulate materials, phosphorus forms, the Prut River
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DOI: dx.doi.org/10.19261/cjm.2013.08(2).06

Graphical Abstract: The supplemented scheme for determination of phosphorus forms in natural waters was tested for the River Prut.

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BUFFER PROPERTIES OF SOIL MINERALS. PART 1. THEORETICAL ASPECTS

Author(s):

Povar Igor, Spinu Oxana

Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 67-72

Keywords: buffer action, complex formation, soil solution, solid phase, thermodynamic stability
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).07

Graphical Abstract: The key quantitative characteristics of the theory of buffer action for polycomponent mono- and two-phase systems have been derived. It is shown, that the buffer properties in relation to the solid phase components are amplified with an increase of solubility due to protolytic or complex formation equilibria in saturated solutions.

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THE INFLUENCE OF APPLIED STABILIZATION METHOD ON THE CRYSTALLINE STABILITY OF YOUNG WHITE WINES

Author(s):

Ecaterina Covaci, Gheorghe Duca, Rodica Sturza

Field: Food chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 73-77

Keywords: young white wine, crystalline stabilization, suspension of bentonite, conductivity
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).08

Graphical Abstract: Crystalline precipitate which occurs due to the presence of tartaric salts is frequently encountered in young wines in form of white-dirty lamellar crystals at the bottom of tank. The aim of the study is to prevent the tartaric salts from crystallization in young wine blend Biance/Sauvignon by implementing various schemes and procedures.

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NICKEL(III) COMPLEX DERIVED FROM 2-HYDROXY-3-METHOXYBENZALDEHYDE SEMICARBAZONE AND 2,2’-BIPYRIDINE

Author(s):

Carolina Vomisescu, Paulina Bourosh, Victor Kravtsov, Diana Dragancea

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 78-82

Keywords: semicarbazone, binuclear nickel(II) complex, crystal structure
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).09

Graphical Abstract: An ONO tridentate semicarbazone Schiff base and a bidentate dipyridyl ligand give a nickel(II) dimer, where atom centers are bridged by phenolate oxygen donors.

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HOMOTRINUCLEAR Fe3III μ – OXO SALICYLATE CLUSTER. SYNTHESIS, STRUCTURE AND PROPERTIES

Author(s):

Viorina Gorinchoy, Sergiu Shova, Elena Melnic, Victor Kravtsov, ConstantinTurta

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 83-89

Keywords: carboxy-cluster, Iron(III), salicylate, IR, Mössbauer, TG data
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).10

Graphical Abstract: A reaction of iron and barium nitrate with ammonium salicylate in the mixture of solvents leads to the formation of the new homotrinuclear complex, [Fe₃O(SalH)₇(H₂O)₂]∙(DMAA)₂(MeOH)(THF)_1,5(H₂O)_2,6. Single-crystal X-ray study shows that the titled complex with the moiety {Fe₃O} belongs to the well-known group of μ3-oxohomotrinuclear carboxylates. The IR and MS studies are in accordance with x-ray data. Thermal behaviour of the complex was studied.

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STUDY ON EXTRACTION PROCESS OF SUNFLOWER (HELIANTHUS ANNUUS L.) DRY WASTES USING DIFFERENT SOLVENTS

Author(s):

Olga Morarescu, Marina Grinco, Ion Dragalin, Veaceslav Kulciţki, Nicon Ungur

Field: Natural product chemistry and synthesis
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 90-93

Keywords: ent-kaur-16-en-19-oic acid, 15α-angeloyl-ent-kaur-16-en-19-oic acid, ent-trachiloban-19-oic acid, diterpene, extraction
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).11

Graphical Abstract:

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MOLECULAR REARRANGEMENTS OF HIGHLY FUNCTIONALIZED TERPENES. AN UNIQUE REACTIVITY OF BICYCLIC FRAMEWORK AND POLIENIC CHAIN INHIBITION UNDER SUPERACIDIC TREATMENT

Author(s):

Marina Grinco, Veaceslav Kulciţki, Pavel F. Vlad, Alic Barba, Elena Gorincioi, Nicon Ungur

Field: Natural product chemistry and synthesis
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 94-100

Keywords: triterpenes, synthesis, superacid, isomerization
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).12

Graphical Abstract:

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STARCH SULFURIC ACID: AN ALTERNATIVE, ECO-FRIENDLY CATALYST FOR BIGINELLI REACTION

Author(s):

Ramin Rezaei, Sara Malek, Mohammad Reza Sheikhi, Mohammad Kazem Mohammadi

Field: Organic chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 101-106

Keywords: Biginelli reaction, dihydropyrimidinones, starch sulfuric acid, solvent-free, biodegradable catalys
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).13

Graphical Abstract:

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STUDYING THE RESEARCH RESULTS REGARDING FERTILIZERS USED IN THE REPUBLIC OF MOLDOVA

Author(s):

T. Leah, I. Povar, T. Lupascu, S. Andries, V. Filipciuc

Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 14-22

Keywords: active substance, fertilizer, humus balance, pollution, soil protection.
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(1).02

Graphical Abstract: This paper represents an analysis of the research concerning the use of fertilizers and nutrients balance in the soils of the Republic of Moldova. The nature and effectiveness of fertilizers, their influence on the agrochemical properties of soils, the protection of the environment from the pollution by nutrients in addition to the regulatory normatives of our country developed in order to determine the necessary in fertilizers for obtaining the expected crops have been as well discussed.

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CHEMICAL COMPOSITION FROM THE DNIESTER RIVER TRIBUTARIES

Author(s):

V. Gladchi, Gh. Duca, N. Goreaceva, E. Bunduchi, A. Lis

Field: Ecological chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 23-32

Keywords: tributary, chemical composition, flow rate, mineralization, redox state.
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(1).03

Graphical Abstract:This article presents the results obtained in the framework of the project 09.832.08.06A. The role of the tributaries on formation of the Dniester river water and the study of the waters quality of sources / fountains in the catchment area of the Dniester river as sources of water supply and for irrigation in the State Program, Scientific Researches and of the management of waters quality.

Downloads: 39