Phenolic compounds, nitrogen

Allomelanins — These are structurally different compounds containing little or no nitrogen. They are considered polymers of phenolic compounds like catechol. Fnngi prodnce melanin pigments, predominantly dihydroxyphenylalanine (DOPA)-melanin and dihydroxynaphthalene (DHN)-melanin. ... 

Nutrient deficiencies may also influence the production of allelochemics. The compounds studied in great detail have been the phenolic compounds and scopolin-related chemicals. Deficiencies of boron, calcium, magnesium, nitrogen, phosphorus, potassium, and sulfur have all been reported to enhance the concentration of chlorogenic acids and scopolin in a variety of plants (4). In other species, chlorogenic acids have decreased in plants that are deficient in magnesium or potassium. 

Leser, C. and Treutter, D. (2005). Effects of nitrogen supply on growth, contents of phenolic compounds and pathogen (scab) resistance of apple trees , Physiologia Plantarum, 123, 49-56. 

The original equations for phenolic and nitrogen-containing compounds are 27... 

Color bodies Sulfur, nitrogen, phenolic, and conjugated compounds formed during processing the result of oxidation and polymerization... 

Coal tar is the condensation product obtained by cooling to approximately ambient temperature, the gas evolved in the destructive distillation of coal. It is a black viscous liquid denser than water and composed primarily of a complex mixture of condensed ring aromatic hydrocarbons. It may contain phenolic compounds, aromatic nitrogen bases and their alkyl derivatives, and paraffinic and olefinic hydrocarbons. Coal-tar pitch is the residue from the distillation of coal tar. It is a black solid having a softening point of 30—180°C (86—359°F). 

S nchez, E. Ruiz, J.M. Garcia, P.C. L6pez-Lefebre, L.R. Rivero, R.M. Romero, L. Response to the bioactivity of phenolic compounds and oxidative metabolism in green bean plants undergoing nitrogen toxicity (in consideration). 

M. Berthelot. found that many nitrogenous organic compounds furnish ammonia when heated with hydriodic acid and J. Kjeldahl showed that the nitrogen of many nitrogenous compounds is all converted into ammonia or ammonium sulphate when heated with cone, sulphuric acid—in the case of nitro-eompounds and cyanides the reaction is not always quantitative. The reaction proceeds more satisfactorily in the presence of mercury or mercuric oxide, copper, potassium hydrosulphate, sugar, phenol, benzoic acid, and analogous compounds. This reaction has been discussed by C. Arnold, A. Atterberg, C. Budde and C. V. Sehon,... 

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