Chemical Nature of Chromosomes

The Chemical Composition of Isolated Chromosomes

By means of 1 M NaCl isolated lymphocyte chromosomes can be separated into two fractions, each of which contains nucleoprotein. The fraction soluble in M NaCl consists largely of desoxyribose nucleohistone, and constitutes 90 to 92 per cent of the mass of the chromosome. The insoluble residue (the residual chromosome is a coiled thread containing some 12 to 14 per cent of ribose nucleic and abo...

NATURE 97:385 - Y Chromosomes of Jewish Priests

According the biblical accounts, the Jewish priesthood was established about 3,300 years ago with the appointment of the first Israelite high priest. Designation of Jewish males to the priesthood continues to this day, and is determined by strict patrilineal decent. Accordingly, we sought and found clear differences in the frequency of Y-chromosomes haplotypes between Jewish priests and their l...

Chemical nature of remineralized flattened enamel surfaces.

Infrared internal reflection spectroscopy (IRS) was used to investigate chemical changes of enamel surface during in vitro remineralization. Specimens were demineralized and exposed either to calcium phosphate-fluoride solutions or to acidulated fluorophosphate. The former showed amorphous phosphate remineralization, and the latter showed surface precipitate interpreted to be calcium fluoride. ...

The Chemical Nature of Genetic Material

Chemical nature of residual phosphorus in Andisols

a Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Biotechnological Bioresource Nucleus (BIOREN-UFRO), Avenida Francisco Salazar 01145, Universidad de La Frontera, Temuco, Chile b Laboratoire Sol et Environnement (LSE), Université de Loraine, Vandoeurve les Nancy cedex, France c UMR Université Paris VI et XII-CNRS-INRA-IRD), Campus AgroParisTech, Thiverval-G...