Phosphonates, compounds with a carbon–phosphorus bond, are a key component of the marine dissolved organic phosphorus pool1. These compounds serve as a phosphorus source for primary producers, including the nitrogen-fixing cyanobacteria Trichodesmium2. Phosphonates can therefore support marine primary production, as well as climate-driven increases in marine nitrogen fixation3, carbon sequestra...

M. Geoffroy () Department of Physical Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland e-mail: [email protected] Abstract The main radical species produced by radiolysis of organophosphorus compounds are described in this chapter. Their identification is generally based on an analysis of the g and hyperfine tensors obtained from EPR experiments performe...

The suzrznaxy of results is part of the program, “Special Problems in Chemotherapy―. Results have been reported with many of the compounds in which inhibition of yeast respiratory mutants was compared to that of the wild type yeasts (1, 2, 3 ). Few corn pounds selectively inhibited the imitants bwt in some cases, a mutant was more sensitive than the parents. The compounds studied have been ...

The impending phosphorus crisis Phosphorus is a nutrient essential to all living organisms, and thus, it is essential in food production for humans. Although it is the eleventh most abundant element on earth, phosphorus never occurs in its pure form and is always bonded with other elements forming other compounds, such as phosphate rock. More importantly, much of the phosphorus in soil is not a...

Phosphine, which has now been confirmed around the carbon-rich star IRC+10216, provides the first example of a phosphorus-containing single bond in interstellar or circumstellar media. While four compounds containing both phosphorus and carbon have been discovered, none contain a carbon–phosphorus single bond. Here, we show that this moiety is plausible from the reaction of phosphine with metha...

The abilityof Cochlodinium polykrikoides to use various nitrogen, phosphorus, and selenium compounds as a nutrient source was examined in batch culture experiments to obtain biological information on the mechanism of C. polykrikoides bloom formation. C. polykrikoides grew using a variety of organic or inorganic nitrogen sources except for L-proline. Maximum yields of C. polykrikoides were obtai...

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...