Phytic acid (inositol hexakisphosphate [InsP(6)]) is the storage compound of phosphorus in seeds. As phytic acid binds strongly to metallic cations, it also acts as a storage compound of metals. To understand the mechanisms underlying metal accumulation and localization in relation to phytic acid storage, we applied synchrotron-based x-ray microfluorescence imaging analysis to characterize the ...

The duckweed Spirodela oligorrhiza was grown in sterile nutrient solutions that contained 1 mm phosphate-(32)P at various specific activities. In solutions with activities higher than 2 muc per mumole per ml, plant growth was inhibited after a time, and the physical appearance of the plants was affected. The critical level of radiation, at which growth was first affected, corresponded to 5 kilo...

Nuclease S1 hydrolyzes the Sp-diastereomer of 5'-O-(2'-deoxyadenosyl)-3'-O-thymidyl phosphorothioate in H2(18)O to [18O]deoxyadenosine 5'-O-phosphorothioate which can be phosphorylated enzymatically to the Sp-diastereomer of [alpha-18O]deoxyadenosine 5'-O-(1-thiotriphosphate). 31P nmr spectroscopy shows the oxygen-18 in this compound to be in a nonbridging position at the alpha-phosphorus, indi...

The compounds [Et4N][(μ-H)(μ-Ph2P(CH2)nPPh2)Mo2(CO)8] (n = 1 and 2) and their parent compound [Et4N][(μ-H)Mo2(CO)10] were synthesized using solvo-thermal method. The IR spectra are identical with those prepared by conventional methods. Protonation of [Et4N][(μ-H)(μPh2P(CH2)nPPh2)Mo2(CO)8] using CF3CO2H at -70 in CH3CN led to the capture of the intermediate [(CO)4MoDPPEMo(CO)4], which was isolat...

reaction of substituted-aniline (8) with ethyl (l-methyl-5-nitroimidazole-2- carbonyl) acetate (9) gave 4-hydroxy-2-(l-methyl-5-nitro-2-imidazolyl)- substituted-quinolines (lo), which were converted to compound 11 with phosphorus oxychloride. substituted-2-(l-methyl-5-nitro-2-imidazo1yl)-4.- methyl-(or phenyl-) quinolines (14) were prepared through the reaction of 2- acetyl-5-nitro-1-methyl-imi...

Metal-free catalysts composed of heavy main group element(s) have been limited. Herein, a theoretical study unveils that pincer-type phosphorus compound bearing boryl-pendant is good catalyst for H2 generation from ammonia borane through phosphorus-boryl (P−B) cooperation function. Pincer-type without not active this reaction, indicating the important role P−B

Anhydrous indium trichloride reacts with [2-(Ph2P)C6H4]2PPh (TP) in the molar ratio 2:1 to give an ionic complex [(TP)InCl2]+ InCLin almost quantitative yield. The structure of the product has been determined by a single crystal X-ray diffraction study. In the cation the TP molecule acts only as a bidentate ligand via its two terminal phosphorus atoms [In-Pl 2.5956(8), In-P2 2.5799o(7) A], Alth...

Iron is an important element for modern sewage treatment, inter alia to remove phosphorus from sewage. However, phosphorus recovery from iron phosphorus containing sewage sludge, without incineration, is not yet economical. We believe, increasing the knowledge about iron-phosphorus speciation in sewage sludge can help to identify new routes for phosphorus recovery. Surplus and digested sludge o...