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A strain of Halomonas bacteria, GFAJ-1, has been reported to be able to use arsenate as a nutrient when phosphate is limiting, and to specifically incorporate arsenic into its DNA in place of phosphorus. However, we have found that arsenate does not contribute to growth of GFAJ-1 when phosphate is limiting and that DNA purified from cells grown with limiting phosphate and abundant arsenate does not exhibit the spontaneous hydrolysis expected of arsenate ester bonds. Furthermore, mass spectrometry showed that this DNA contains only trace amounts of free arsenate and no detectable covalently bound arsenate., Comment: Originally submitted to Science January 30 2012. This is the revised version, resubmitted on April 13 2012. It has not been officially accepted

Some of the problems related to aircraft noise such as aircraft noise indices, immission standards, land use planning, en route noise and general sensitivity to noise are briefly discussed.

Peptides formation from glycine in presence of trimetaphosphate, investigating mechanism

Uridine phosphorylation by heating with inorganic orthophosphates achieved via nucleoside reactions

Peptide formation during glycine reaction with linear polyphosphates and cyclic metaphosphates, considering prebiotic synthesis

Electric discharge reactions in mixtures of phosphine with methane, ammonia and water, obtaining biologically significant inorganic and organic phosphorus compounds

Isothiocyanates and phenyl isocyanate reaction with hydrazinoethanol and hydrazinoethyl hydrogen sulfate

Prebiotic chemical reactions on primitive earth in evolution of life, discussing phosphorylation of nucleosides with phosphoric acid and monobasic salts