the in-situ method of synthesis has been used to isolate oxovanadium(iv) complexes with ligands derived by reaction of benzil with amino acids such as glycine, alanine, serine, cysteine and valine, where template effect of vo +2 cation appears to play an important role. the complexes are characterised by elemental analysis, magnetic moment measurements and spectral (infrared, electronic and ele...

a simple, selective and sensitive method for the determination of trace amount of titanium (iv) based on its catalytic effect on methylene blue- ascorbic acid redox reaction has been reported. the reaction was followed spectrophotometrically by measuring the change in absorbance of methylene blue at 665 nm, 5 minutes after the initiation of the reaction. in this study experimental parameters we...

Two hundred samples were taken from various sites in Iran, including coal storage areas, waste water in the Tabas and Zirab coal mines, and sulphur containing acid springs in Ramsar and Abask , and were screened for Thlobacillus ferruuxidans. During this investigation , seven strains were isolated which could oxidize sdphm , pyrite , thiosdphate and ferrous iron as the sole energy source. Macr...

Geological studies are very important at different steps of mining activities. Different uncertain geological criteria and factors show a significant impact during the underground operations mineral extraction process. The current study reports on evaluation classification coal seams for methane drainage-ability (MDA) through fuzzy hybrid approach. This problem was investigated due to importanc...

background and aims: students experience some degrees of mental disorders during their life. therefore, the present study was conducted to determine the prevalence and risk factors of mental disorders among the secondary school students in ilam, iran. methods: this is a cross sectional study, carried out among the secondary school students in ilam, iran. we assessed 841 students including 446 m...

nicotine is one the chemical substance with high level of toxically. it crosses the placenta and accumulates in the developing organs of fetus. our previous investigations indicated that collagen type iv plays a key role in basement membrane of various embryonic organs. in this study we evaluated the effect of maternal nicotine exposure pre and postnatal period on collagen iv expression during ...

iv therapy is an important option in incapable patients’ treatment. in this paper, we discuss about: a) for best control of them, we must know about what materials are in these drugs? b) for what reason they are use? c) what errors may be happen in use of them? amount of iv fluids must be accommodating with loss of fluids. firstly, we review amount of main body fluids. main part of our body wei...