I . Urinary excretion of total ether-soluble acids and of methylmalonic acid was studied in rats on vitamin BI2-deficient diets with and without a vitamin Blz supplement. 2. It was shown that urinary excretion of total ether-soluble acids and methylmalonic acid was increased in vitamin R1,-deficient rats and that this increase was somewhat variable between individual animals, males and females,...

Excimer-containing polymers with supramolecular mechanochromism are an attractive and well-investigated class of mechanoresponsive materials. However, only recently steps toward mechanophore-like mechanochromic systems that anchored within the parent polymer structure show defined optical transitions on molecular scale have been reported. multi-step syntheses these constructs tedious. Here we r...

De Saussure, in his famous work, "Recherches Chimiques Sur La Vegetation", devoted considerable attention to humus. He found that it is not a homogeneous substance, but that it consists of various complexes which can be readily removed. Thaer differentiated between "acid humus" or peat, formed with limited admission of oxygen, and "mild humus", formed in the presence of sufficient oxygen. Liebi...

Salvarsan, the trade name for the hydrochloride of arseno-amino phenol, is suitable, readily oxidising in the presence of air, forming highly toxic compounds of a grey or brownish colour, and slowly soluble in both water and saline. By replacement of a hydrogen group in the phenol radicles by sodium, a salt is formed which is less toxic and rather more soluble in water, but the destruction of t...

The complex-forming abilities of a water-soluble ƒÀ-cyclodextrin-epichlorohydrin polymer (CDPS) and two different molecular weight fractions of CDPS were studied and compared with those of ƒÀ-cyclodextrin (ƒÀ3-CyD) and dimethyl-ƒÀ-cyclodextrin (DM-ƒÀ-CyD). CDPS was separated into two main fractions by gel chromatography. CDPS and its fractions formed inclusion compounds with several drugs and t...

A 345-bp gene that encodes human bone morphogenetic protein-2 (hBMP-2) has been synthesized. The codon usage of the resulting gene was modified to include those triplets that are utilized in highly expressed Escherichia coli genes. The hBMP-2 gene was efficiently expressed in E. coli as a soluble and active protein. Since the recombinant hBMP-2 was readily solublized, no further solublization s...

Soluble plutonium is oxidized to the Pi(VI) oxidation state by chlorine during water treatment. Under certain conditions Pi(VI) is readily absorbed from the gastrointestinal tract. It appears that due consideration has not been given to the effect that the presence of plutonium in this oxidation state may have on the maximum permissible concentration of plutonium in drinking water.

A recyclable catalyst, Ni(0)-CMC-Na, composed of nickel colloids dispersed in a water soluble bioorganic polymer, sodium carboxymethylcellulose (CMC-Na), was synthesized by a simple procedure from readily available reagents. The catalyst thus obtained is stable and highly active in alkene hydrogenations.

[reaction: see text] Tyrosine-derived Zn(2+) coordination complexes and their fluorescent NBD conjugates are synthesized in a short, high-yielding procedure. The Zn(2+) complexes are highly water soluble, but in the presence of sodium laurate they readily transfer into an octanol layer. Furthermore, the NBD-labeled bis-Zn(2+) complex can partition into vesicle membranes containing anionic phosp...