Chemistry Journal of Moldova

DOI: dx.doi.org/10.19261/cjm.2012.07(2).01

Graphical Abstract: The main products of sclareol (1) Ritter’s reaction in mild conditions are (8R,13R)-Labd-14(15)-en-8,13-diacetamide (2) (8R,13S)-Labd-14(15)-en-8,13-diacetamide (3) stereoisomeric on C13 atom and having unrearranged native diol skeleton. We present in the current communication the results of sclareol converting (1) into nitrogen-containing labdanes
in the Ritter’s reaction conditions.


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DOI: dx.doi.org/10.19261/cjm.2012.07(2).02

Graphical Abstract: It was shown by X-ray phase analysis, IR spectra analysis and MALDI-ToF mass spectrometry methods that interaction of synthetic hydroxyapatite with a solution of immunoglobulin G leads to its partial dissolution due to leaching from the surface of calcium triphosphate which, in our opinion, forms complexes with immunoglobulin G.

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DOI: dx.doi.org/10.19261/cjm.2012.07(2).04

Graphical Abstract: A simple and efficient method for preparation of 5-aryloxy tetrazoles (3a-h) from arylcyanates (1a-h) with using ZnCl₂/AlCl₃/silica (ZAS) as an effective heterogeneous catalyst in solvent free are described with excellent yields and high purity. The rate of product formation was enhanced by introduction of electron donating substituents. The ¹H NMR and chemical shifts and multiplicities are also discussed.


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DOI: dx.doi.org/10.19261/cjm.2012.07(2).05

Graphical Abstract: By interaction of cobalt(II), nickel(II), or zinc(II) nitrate with 4,5- diphenylimidazole in methanol in solvotermal conditions the new derivative of imidazole (4,5-diphenyl-2-nitroimidazole) and three new coordinative compounds [M(4,5-Ph2ImNO₂)₂(CH₃OH)₂] have been synthesized and investigated. Metal ions have a distorted octahedral environment with N₂O₄. Coordination number of metal is six. Ligand is coordinated to metal ion by one oxygen atom of nitrogroup and one nitrogen atom of imidazole.


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DOI: dx.doi.org/10.19261/cjm.2012.07(2).07

Graphical Abstract: This paper presents the study information related to the processing of fruit by combined methods. Is presented on the concept of water activity and its role in product quality; mathematical modeling methods (GAB, BET et al.) in estimate the activity coefficients of non-electrolyte and electrolyte mixture. Have been carried experimental research to study the evolution of the biologically active substances in frozen strawberries with and without sugar addition. It proved that frozen strawberries with sugar, during storage are more stable regarding antioxidants content that strawberry frozen without sugar.


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DOI: dx.doi.org/10.19261/cjm.2012.07(2).08

Graphical Abstract: A number of studies have shown phthalates’ potential impact on human health due to their carcinogenic and endocrinedisrupting effects. More than 2000 analyses for determination of phthalates’ rests in alcoholic beverages were done in the laboratory of National Center for Quality Testing of the Alcoholic Beverages (Republic of Moldova) using modern method of analysis like GC-MS. This article is an extended abstract of a communication presented at the Conference Ecological Chemistry 2012.


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DOI: dx.doi.org/10.19261/cjm.2012.07(2).09

Graphical Abstract: This paper presents the results of scientific research aimed at studying processes of obtaining activated carbon from wood charcoal. We presented methods for determining the structure parameters and specific surface of carbonic adsorbents. Scientific research results allow concluding that wood charcoal is a cheap and effective material for the synthesis of activated charcoal.


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DOI: dx.doi.org/10.19261/cjm.2012.07(2).10

Graphical Abstract: The paper presents the results of groundwater study from different sources, selected in v. Myndreshty, Telenesti district, in various villages of Cahul district and in artesian wells in and around Chisinau. Large differences were evidenced in water chemistry in different villages of one district, as well as within the same village. Was assessed thee compliance of analyzed water to quality requirements of drinking water.


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