Chemistry Journal of Moldova

DOI: dx.doi.org/10.19261/cjm.2017.404  

 
Abstract (PDF)

Graphical Abstract: Growth of Methylococcus capsulatus (M) under different copper content in the growth medium has been studied. Excess of copper is sorbed in cytoplasm and on the cell surface. Growth of M. capsulatus (М) under copper-limited and copper-excess growth conditions is accompanied by increase of methanobactin secretion into the growth medium.

DOI: dx.doi.org/10.19261/cjm.2017.393

 

Abstract (PDF)
Graphical Abstract: This article is devoted to the study of the mechanism of action of pesticides as compounds with a high complexing capacity for metals, nucleotides and enzymes. The sum of these effects is the cause of almost all diseases of modern man, and including - cancer. It is very necessary to ban the use of pesticides to save our world, ecosystems and human and the population health improvement.

DOI: dx.doi.org/10.19261/cjm.2017.399 

 

Abstract (PDF)
Graphical Abstract: The incidence and the type of acute chemical poisoning in Republic of Moldova during 2011-2015 were assessed. Records show 22458 cases of poisonings, including 919 death cases. The analysis of poisoning cases involving various types of chemical substances causing the intoxication reveals that the medicines-related poisoning accounts for the highest record of cases (6971), followed by alcohol poisoning, 6556 cases, gas poisoning is the third, with 1860 cases, and pesticide-related poisoning, with 707 cases. Age and gender characteristics of chemical poisonings and ways of exposure to chemicals are discussed.


 

DOI: dx.doi.org/10.19261/cjm.2016.11(2).01

 

Graphical Abstract: Adsorption of strontium ions from aqueous solutions on active carbons CAN-7 and oxidized CAN-8 has been studied. Obtained results showed that the adsorption isotherms for strontium ions from aqueous solutions are well described by the Langmuir and Dubinin-Radushkevich equations, respectively. The surface heterogeneity of activated carbons CAN-7 and oxidized CAN-8 has been assessed by using Freundlich equation.

 

Graphical Abstract: During of 2014 year, 60 soil samples at the point of 30 soil samples in the spring and 30 soil samples in autumn were taken from the locality of Fındıklı, Pazar and Sabuncular, where cultivation of green tea has been made in Rize (Turkey). The value of pH, organic matter content, and macro- and microelements amount were determined in sampled soils and the seasonal changes were investigated.

DOI: dx.doi.org/10.19261/cjm.2016.11(2).08

 

DOI: dx.doi.org/10.19261/cjm.2016.11(1).02

Graphical Abstract: The research results have marked a low value of the self-purification capacity for Beleu Lake water, between 0.12 and 0.19, which is of 1.2-2 times smaller than the one from Prut River (0.25), correlating positively with the values of BOD5, COD-Cr and the time of biochemical oxidation of ammonium ions. The evolution of stage NH4+(NH3) → NO2- in the process of nitrification in lake water in November 2014 takes place about 25 days and the process NO2- → NO3- is more than 35 days, the duration about 2 times higher than in lake water stages from 2015 and 2.8-3.0 times higher than that of the model with water from Prut River.

The article is Open Access by CC-BY 4.0 License

Cite this article as:

M. Sandu, A. Tarita, R. Lozan, N. Zgircu, E. Mosanu, T. Goreacioc, A. Zlotea, A. Comarnitchi, I. Sidoren, S. Turcan, A. Tarita. Ecological Potential of Surface Waters in Natural Scientific Reserve “Lower Prut”. Chemistry Journal of Moldova, 2016, 11(1), pp. 21-26. DOI: dx.doi.org/10.19261/cjm.2016.11(1).02

Article Source: Ecological Potential of Surface Waters in Natural Scientific Reserve “Lower Prut”. 

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DOI: dx.doi.org/10.19261/cjm.2015.10(2).02

Graphical Abstract:  The influence of substrates on the oxidation of reduced toxic forms of nitrogen in river water was investigated by laboratory modelling. Granite and expended clay accelerate the oxidation of ammonium and nitrite ions from 2 to 4 times. The presence of calcium carbonate in water hinders the oxidation of nitrogen in the polluted water.

DOI: dx.doi.org/10.19261/cjm.2008.03(1).01

Graphical Abstract: This research paper presents the results of the investigation of antioxidant activities of various inhibitors, which are constituents of winery products: quercitin, rezveratrol, dihydroxyfumaric acid. Also, the antioxidant activity of tartaric and dihydroxyfumaric (DFH₄) acids derivatives has been determined: sodium dihydroxyfumarate, dimethylic ester of DFH₄ and dimethylic ester of tartaric acid. The enotannin extracts obtained from grape seeds have been evaluated: the non-oxidized enotannin extract Eneox and the oxidized one -Enoxil.

DOI: dx.doi.org/10.19261/cjm.2015.10(1).02

Graphical Abstract:  This paper dwells upon the influence of sodium ions on experimental results regarding the concentration of strontium ions in waters with a high content of sodium ions by emission flame photometry and atomic absorption spectroscopy. The metrological characteristics of both methods are evaluated.