Seventy Two sediments from four stations (Anzali, Tonekabon, Noshahr and Amirabad), located in Caspian Sea-Iranian coast were examined on the basis of P-fractionation in autumn and winter of 2013-2014. Several forms of the phosphorus in sediment were separated and extracted according to sequential extraction method. Then the extracted phosphorus in each fraction was determined by UV–Vis spectro...

Seventy Two sediments from four stations (Anzali, Tonekabon, Noshahr and Amirabad), located in Caspian Sea-Iranian coast were examined on the basis of P-fractionation in autumn and winter of 2013-2014. Several forms of the phosphorus in sediment were separated and extracted according to sequential extraction method. Then the extracted phosphorus in each fraction was determined by UV–Vis s...

OBJECTIVE To comparatively investigate the inorganic composition and crystallographic properties of cortical and cancellous bone via thermal treatment under 700 °C. METHODS Thermogravimetric measurement, infrared spectrometer, X-ray diffraction, chemical analysis and X-ray photo-electron spectrometer were used to test the physical and chemical properties of cortical and cancellous bone at roo...

This study investigated migration and transformation mechanism of P in waste activated sludge (WAS) during anaerobic fermentation (AF) process the subsequent hydrothermal conversion (HTC) process. Control pH AF processes was found to be significant, whereby use acidic (pH = 5.5) or alkaline conditions 9.5) facilitated release either apatite phosphorus (AP) non-apatite inorganic (NAIP) organic p...

l. The concentrations of the major inorganic ions in the hemolymph of Periplanetn americana were determined as follows (in mM): Na+, 132; K+, 8.7; Mg*+, 4.7; Cazf, 3.7; Cl-, 107; PO:-, 1.04. 2. By the method of ultrafiltration, significant binding to macromolecules in hemolymph was demonstrated for the following ions: Na+, 22.0%; Mg*+, 25.5°/0; Ca*+, 16.2%; Cl-, 10.3%; PO:-, 26.9%. 3. K’ was no...

Thallium (Tl) is a highly toxic heavy metal that poses threat to various organisms, including human beings. In plants, Tl mostly present as the uncomplexed Tl+ species, and its uptake by plants follows similar trend of other monovalent ions such NH4+, Cs+, K+, Rb+, others. this study, we investigated relationships between concentrations in barley sunflower extractable-Tl acidic, neutral, alkali...

The synthesis of low-temperature belite (C2S) clinker from wastes autoclaved aerated concrete and limestone was studied in the presence CaCl2 as a mineralizing agent. Synthetic chlorellestadite (SCE; Ca10(SiO4)3(SO4)3Cl2) forms experiments at temperatures between 700 1200 °C. Samples were investigated by X-ray diffraction Raman spectroscopy. In general, amount SCE depends mainly on sulfate cont...

Southern hybridization analysis of the genomes from the newly-isolated 10 carbazole (CAR)-utilizing bacteria revealed that 8 of the isolates carried gene clusters homologous to the CAR-catabolic car operon of Pseudomonas resinovorans strain CA10. Sequencing analysis showed that two car operons and the neighboring regions of Pseudomonas sp. strain K23 are nearly identical to that of strain CA10....

FLEISCH, HERBERT, AND SYLVXA BISAZ. Isolation from urine of pyrophosphate, a calczjlcution inhibitor. Am. J. Physiol. 203(4) : 671-675. 1962. -The minimum value of the product, Ca x P, necessary for calcium phosphate precipitation to occur, was determined in vitro. The addition of 2.2 y0 urine to the solutions raised the mean product from 53 to 105 (mg/I oo ml)2, which shows that the urine cont...