Control clumps of Selaginella wallacei Heiron., sprayed with distilled water with Tween 20, produced a high proportion of microsporangia. Similar clumps sprayed with 2-chlorethyl-phosphonic acid, and ethylene-releasing compound (Ethephon), at 7.65 and 76.5 mg/liter produced almost exclusively megasporangia. Treatment of Selaginella pallescens (Presl) Spring with Ethephon at 34 mg/liter caused t...

General. Linkers used in preparation of modified hyaluronan (HA) derivatives were synthesized according to stated literature procedures. Their structures are given in Scheme S1. Particularly, 3,3'dithiobis(propionic hydrazide) 11 and 2-(2-pyridinyldithio)ethyl hydrazinecarboxylate 32 were used to attach thioland 2-dithiopyridyl-terminated side chains to HA backbone respectively. 3-(Acrylamido-1...

Polymers bearing phosphonic acid groups have been proposed as anhydrous proton-conducting membranes at elevated operating temperatures for applications in fuel cells. However, the synthesis of phosphonated polymers and control over nanostructure such is challenging. Here, we report straightforward acid-terminated, long-chain aliphatic materials with precisely 26 48 carbon atoms (C26PA2 C48PA2)....

Glucocorticoid receptors of rat kidney and liver were compared by physicochemical and immunochemical methods to investigate the role of proteolysis in the formation of corticosteroid binder IB. Kidney cytosol prepared in the presence of sodium molybdate contained receptor forms comparable to rat liver glucocorticoid receptor; [3H]triamcinolone acetonide-labeled receptors eluted from Sephacryl S...

The expression of the moa locus, which encodes enzymes required for molybdopterin biosynthesis, is enhanced under anaerobiosis but repressed when the bacterium is able to synthesize active molybdenum cofactor. In addition, moa expression exhibits a strong requirement for molybdate. The molybdate enhancement of moa transcription is fully dependent upon the molybdate-binding protein, ModE, which ...

Phosphate (PO 4 3? ) is an important nutrient for phytoplankton growth and at high loadings can result in water quality deteriorations. Autonomous PO measurements are required monitoring purposes, best achieved using sensitive, portable low-cost techniques. Here we describe a new electrochemical sensor detection seawater. The quantification of typically depends on the reaction between molybdate...