Nitrogen unidentified forms

Diazomethane and 4-nitrobenzofuroxan react, with loss of nitrogen, to form the cyclopropa-fused derivative 249 (20%), along with a considerable amount of unidentified material.505... 

Leonard and Elderfield have also carried out degradation experiments with alstonine and its tetrahydride. On fusion with potassium hydroxide at 300-350° in nitrogen, alstonine furnishes barman (p. 490) and indefinite basic and acidic fractions. Tetrahydroalstonine on like treatment produces barman, worharman, and three unidentified bases, each of which fluoresces blue in alcoholic hydrochloric acid Base A, C4,H4gN2, m.p. 171-5 to 172-5°, forms a picrate, m.p. > 267° is probably a substituted -carboline. Base B, or 18 3, gives apicrate, m.p. 261° (dec.). Base C,... 

Photolytic. Major products reported from the photooxidation of butane with nitrogen oxides under atmospheric conditions were acetaldehyde, formaldehyde, and 2-butanone. Minor products included peroxyacyl nitrates and methyl, ethyl and propyl nitrates, carbon monoxide, and carbon dioxide. Biacetyl, tert-butyl nitrate, ethanol, and acetone were reported as trace products (Altshuller, 1983 Bufalini et al, 1971). The amount of sec-butyl nitrate formed was about twice that of n-butyl nitrate. 2-Butanone was the major photooxidation product with a yield of 37% (Evmorfopoulos and Glavas, 1998). Irradiation of butane in the presence of chlorine yielded carbon monoxide, carbon dioxide, hydroperoxides, peroxyacid, and other carbonyl compounds (Hanst and Gay, 1983). Nitrous acid vapor and butane in a smog chamber were irradiated with UV light. Major oxidation products identified included 2-butanone, acetaldehyde, and butanal. Minor products included peroxyacetyl nitrate, methyl nitrate, and unidentified compounds (Cox et al., 1981). 

Soil/Plant In soils and plants, monuron is demethylated at the terminal nitrogen atom coupled with ring hydroxylation forming 3-(2-hydroxy-4-chlorophenyl)urea and 3-(3-hydroxy-4-chloro-phenyl)urea (Hartley and Kidd, 1987). Wallnbefer et al. (1973) reported that the soil microorganism Rhizopus Japonicus degraded monuron into 3-(4-chlorophenyl)-l-methylurea. However, in the presence of Pseudomonas or Arthrobacter sp., monuron degraded to 2,4-di-chloroaniline, sj/ 3-bis(3,4-dichlorophenyl)urea, and unidentified metabolites (Janko et al., 1970). The reported half-life in soil is 166 d (Jury et al., 1987). 

Nitric oxide, a precursor of nitrogen dioxide, occurs naturally in the human body, where it acts as endothelial derived relaxing factor (EDRF), a neurotransmitter, and in unidentified ways in the nose, sinuses, and lower airways. Up to 15 ppm can be found normally in the nose and sinuses (DuBois et al. 1998). The substrate is 1-arginine, and the enzymes consist of different forms of nitric oxide synthase, which turn arginine into citrulline. Inhaled nitric oxide gas is used at concentrations of up to 50 ppm to decrease pulmonary arterial pressure. Nitric oxide reacts in tissues to form nitrites and nitrates. 

When a 1 10 mole ratio solution of COS in propylene was irradiated in the solid phase at liquid nitrogen temperature, in addition to a minor unidentified product, the three principal gas phase products, MVM, AM, and PS, were formed in a relative yield of 0.10 0 0.34 1.00, respectively. The corresponding gas phase values were 0 21 0.25 1.00. 

This fraction was obtained by precipitation with acetone from an ethereal extract of the cells. It formed acidic colloidal solutions with water and contained 0.37% nitrogen and 2.16% phosphorus. On hydrolysis with 5% sulfuric acid, 33.6% of water-soluble components and 65% of fatty acids were obtained. The hydrolysate contained glycerophos-phoric acid, inositol, D-mannose, and an unidentified hexose, which... 

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