Chemistry Journal of Moldova. General, Industrial and Ecological Chemistry

27-31

Authors: Inga Zinicovscaia

Due to its widespread industrial use, chromium has become a serious pollutant in diverse environmental settings. The main source of chromium pollution including the Republic o Moldova is industry. It is a great need to develop new eco-friendly methods of chromium removal. Biosorption of heavy metals is a most promising technology involved in the removal of toxic metals from industrial waste streams and natural waters. Metal removal treatment systems using microorganisms are cheap because of the low cost of sorbent materials used and as they do not add other ions or toxic chemicals to the environment. The present review discusses hexavalent chromium biosorption properties of bacteria, microalgae and fungi, as well as adsorption isotherms (Langmiur, Freundlich, Langmiur-Freundlich) used in the evaluation of the adsorptive capacity of the biomaterial.

39-45

Authors: Gheorghe Duca, Albert Ivancic, Veaceslav Boldescu

This paper represents an analysis of potential and current applications of cyclodextrins as biologically active substances in medicine. The main applications described here include use of cyclodextrins as agents that form inclusion complexes with endogenous substances (membrane lipids, cellular cholesterol), agents that form inclusion complexes with exogenous substances with their man role as guest molecules (sugammadex, FBCx), agents that block endogenous and exogenous macromolecules (ion channels, anthrax toxin, α-hemolysin), and agents which activity is based on the chemical nature of them and of their derivatives (cyclodextrin polysulphate derivatives). The first classification for medically important biological activity of cyclodextrins has been proposed.

57-66

Authors: Larisa Zadorojnâi, Alexandru Zadorojnâi

Properties and methods for obtaining hyaluronic acid and its derivatives from raw material of animal origin are reviewed. The importance and practical application of hyaluronic acid in various fields are discussed.

78-83

Authors: Vasile Rusu, Larisa Postolachi, Alexei Maftuleac, Tudor Lupascu

Seasonal, spatial and multi-annual dynamics of phosphorus forms in bottom sediments and their interstitial water for river Dniester was evaluated. The spatial dynamics of phosphorus forms in the bottom sediments along river had, in general, the same trend during of 2004 and 2009 years, being recorded the increasing tendency along river Dniester for inorganic phosphorus and decreasing tendency for organic phosphorus. Multi-annual dynamics for 2004-2010 years showed a tendency of increasing of all phosphorus forms in bottom sediments; the highest values being registered during 2010 year. Spatial and seasonal dynamics of phosphorus forms in bottom sediments and their interstitial water were generally in correspondence, although sometimes with some differences.

89-92

Authors: Mitina Tatyana, Bondarenco Nadejda, Bunciuc Oxana

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.

98-102

Authors: Duca George, Sturza Rodica, Lazakovich Dmitri

A number of studies have shown phthalates’ potential impact on human health due to their carcinogenic and endocrine-disrupting 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.

116-123

Authors: Natalia S. Marchitan

Tartaric acid is one of the most valuable compounds that can be obtained from secondary wine products. The last are accumulating in big quantities at winemaking factories from Moldova. This work describes an investigation of the process of reactive ion-exchange separation of tartaric acid from model systems with macroreticular resin Amberlite XAD2 impregnated with liquid ion-exchanger Amberlite LA-2 in batch equipment. The condition of Amberlite XAD2 impregnation process was investigated. Freudlich and Langmuir equations were verified and values of enthalpy, entropy and Gibbs energy were calculated.

130-135

Authors: Ferydoon Khamooshi and Batool Haghighi Kekhaiye Jhaleh

A simple and effi cient 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 is 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.

143-146

Authors: Pylypchuk E. V., Mishchenko Valentin N., Gromovoy Taras Yu.

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.