Radiometric dating--the process of determining the age of rocks from the decay of their radioactive elements-has been in widespread use for over half a century. There are over forty such techniques, each using a different radioactive element or a different way of measuring them. It has become increasingly clear that these radiometric dating techniques agree with each other and as a whole, prese...

Aflatoxins are toxins which are usually produced by a kind of Aspergillus fungus named Flavus, Parasiticus, and Numius. There are 18 kinds of Aflatoxins have been discovered by scientists and Aflatoxin B1 is the most toxic and carcinogenic. Taking aflatoxins present in food causes lots of diseases like liver diseases, alcoholic liver, mutagenesis, and malformation in animals. It also has some o...

Aflatoxins are toxins which are usually produced by a kind of Aspergillus fungus named Flavus, Parasiticus, and Numius. There are 18 kinds of Aflatoxins have been discovered by scientists and Aflatoxin B1 is the most toxic and carcinogenic. Taking aflatoxins present in food causes lots of diseases like liver diseases, alcoholic liver, mutagenesis, and malformation in animals. It also has some o...

In paper IV of this series (1), evidence was given that there was no significant loss of plasma into the tissues of the dog in untreated fatal shock from hemorrhage. The technic utilized involved the tagging of plasma proteins by radioactive sulfur or radioactive bromine. Before extending the observations to shock in which there is an area of local injury, such as occurs in tourniquet and burn ...

The paper concerns numerical modelling of complicated GeoTechnical problems as mine stability, performance of underground radioactive waste repositories or microstructure modelling of geocomposites. The modelling uses finite elements and parallel computing based on overlapping domain decomposition. Important implementation issues for this approach are discussed: inexact solution of subproblems,...

Accidental or intentional release of radioactive materials into the living or working environment may cause radioactive contamination. In nuclear medicine departments, radioactive contamination is usually due to radionuclides which emit high energy gamma photons and particles. These radionuclides have a broad range of energies and penetration capabilities. Rapid detection of radioactive contami...

Introduction The hafnium-tungsten (Hf-W) isotopic system provides a powerful constraint on accretion and core formation timescales [1-3]. However, most estimates of these timescales employ analytical expressions assuming either continuous planetary growth or instantaneous core formation. In contrast, dynamical modelling of planetary accretion suggests that the final stage of terrestrial planet ...

As part of a program devoted to studying the accumulation of metallic ions by mammalian skeletal tissue, it was decided to investigate the uptake of yttrium by rats. Although this element is encountered but rarely in biochemical investigations, its behavior in the body has become important since its discovery as one of the major products of nuclear fission (1). Radioactive isotopes of yttrium h...