A method is described for the purification of the A substance in horse saliva, and additional observations on the chemical properties of the preparation are reported. The preparation isolated was found to be highly active serologically and it appears to be polysaccharide in nature.

Activated carbons are high-grade carbonaceous products, having a porous structure and a large internal surface area. Such properties enable then to adsorb a wide variety of substances, i.e. they are able to capture molecules of gases and liquids in their internal surfaces. Therefore, they are used in industry in several applications including those for purification, chemical recovery and enviro...

The synthesis of nanoparticles of different chemical compositions, sizes, and controlled monodispersity is an important area of research in nanotechnology. Among noble metal nanoparticles, silver nanoparticles have a wide area of interest, thus, they have gained immense applicability into the daily life of modern individuals such as for biomedical applications, air and water purification, food ...

Mesoporous ferrihydrite nanoparticles with incorporated Mn (MMnFh) were prepared for the first time, and MMnFh exhibits excellent performance in removing organic contaminants (CH(3)CHO and toluene) in air. The interesting physico-chemical properties and remarkable activity of MMnFh give great commercial potential in air purification application in diverse sectors.

Biologically sensitive field-effect transistors (BioFETs) are a promising technology for detecting pathogens, antigen-antibody complexes, and tumor markers. A BioFET is studied for a biotin-streptavidin complex. Biotin-streptavidin is used in detection and purification of various biomolecules. The link between the Angstrom scale of the chemical reaction and the micrometer scale of the field eff...

A previous paper (2) described the isolation and crystallization of gastricsin from human gastric juice and the physical, chemical, and enzymatic properties of gastricsin as compared to human pepsin. It is the purpose of the present report to describe the purification and properties of a zymogen from human gastric mucosa. The activation of this zymogen produces both gastricsin and human pepsin.

Therapeutic proteins produced using recombinant DNA technologies are generally complex, heterogeneous, and subject to a variety of enzymatic or chemical modifications during expression, purification, and long-term storage. Hence the analytical strategies for characterization, quantitation, purity assay and evaluation of the biological activity of recombinant proteins still represent a big chall...