The current increase in the vast amount of marine crustacean shell waste produced by the fish processing industries has led to the need to find new methods for its disposal. Hence, the present study was carried out via marine shell wastes as substrate for protease production. The maximum production (4000.65 U/ml) from Bacillus sp. APCMST-RS3 was noticed in 3:1% shrimp and oyster shell powder (S...

A sample from near the base of the sedimentary Hammamat Group at Gebel Umm Tawat, North Eastern Desert, Egypt, contains detrital zircons with sensitive high-resolution ion microprobe (SHRIMP) U– Pb ages as young as 585 13 Ma. This age is within error of recent SHRIMP dates from the adjacent Dokhan Volcanic Series and establishes that they contributed material to the sediments. It is also c. 45 ...

Abstract In this article, novel geochronological (U–Pb SHRIMP) and geochemical data are presented from the lowermost sandstone unit (Par formation), basement granites of Gwalior Basin sandstones Bhopal Basin, located along margins Archaean Bundelkhand Craton. The variation diagrams imply that units in Basins were deposited rift-induced passive margin tectonic settings. contrast to magmatic feat...

The 24 hour urinary excretion of cadmium (U-Cd) and lead (U-Pb), and the excretion of beta-2- microglobulins and retinol binding protein concentration in spot urines, were determined in a random 4% sample of the population of a small Belgian town. Blood pressure and body weight were measured on two separate occasions. U-Cd averaged 2.4 nmol/24 h in 46 youths, increased with age, and was signifi...

Chitooligosaccharides could be produced from chitosan by a newly isolated microorganism, Bacillus thuringiensis ZJOU-010, which exhibited chitosanase activity using shrimp shell wastes as the carbon/nitrogen source. In this study, a 2 central composite experimental design was performed to improve the chitosanase activity by response surface methodology (RSM). The mathematical model developed wa...

Zircon (ZrSiO4) is the most commonly used geochronometer, preserving age and geochemical information through a wide range of geological processes. However, zircon U-Pb geochronology can be affected by redistribution of radiogenic Pb, which is incompatible in the crystal structure. This phenomenon is particularly common in zircon that has experienced ultra-high temperature metamorphism, where io...

Introduction: The U-Pb isotope system provides unparalleled chronological resolution in the determination of absolute ages of events occurring in early solar system history. Proper comparison of these absolute ages with the relative chronologies emerging from studies of now-extinct nuclides such as Al, Mn, and Hf requires identification of fixed time points in the evolution of materials in the ...