chitin or other P-linked polymers. The enzyme activity was increased about 2.5-fold by the addition of 10 mM Co2+ and 1.4-fold by Mn2+. However, Cu2+ ion strongly inhibited the enzyme. Optimum temperature and pH were 60eC and 6.5, respectively. The enzyme was stable after heat treatment at 800C for 30 min or 70eC for 60 min and fairly stable in protein denaturants as well. Chitosan was hydrolyz...

Background: The antimicrobial resistance of pathogenic bacteria has emerged as a major health problem in recent years. Extensive research been conducted to find new agents. Objectives: aim this study was examine the antibacterial activities benzohydrazide derivatives. Methods: Manganese hydrogen sulfate choline chloride applied simple method for synthesizing Antibacterial derivatives were asses...

BACKGROUND Manganese is an essential element, but excessive manganese exposure has neurotoxic effects. OBJECTIVE To examine blood manganese levels in the general population with respect to sex, age, race/ethnicity, pregnancy and menauposal status, as well as levels of trace elements in blood. METHODS We used data from the National Health and Nutrition Examination Survey, a national survey o...

The essential trace elements zinc and manganese have been noted as factors in brain disease since the Twenties. The combined use of zinc and manganese in schizophrenia is based on: 1) Increased urinary excretion of copper when both zinc and manganese are given orally 2) Zinc alone causes a decrease in blood manganese and 3) The double deficiency of zinc and manganese frequently is found in pati...

Electrolytic manganese dioxide (EMD) was prepared by using gas diffusion electrode (GDE) instead of traditional hydrogen evolution cathode. Sulfate acid’s effects on the cell voltage, the current efficiency, the electro-catalytic activity and the lifetime of GDE are studied. The results show that as the concentration of sulfuric acid increases, the current efficiency increases, while the cell v...

Pore water and sediment geochemistry in the western Black Sea were investigated on long Calypso piston core samples. Using this type of coring device facilitates recovery thick record necessary to analyze transport-reaction processes response postglacial sea-level rise intrusion Mediterranean salt 9 ka ago, thus, better characterize key biogeochemical process changes shift from lacustrine marin...