scholarly journals Studies on Amino-Acid and Related Compounds. XIV. Action of Nitric Acid on Phenylalanine, Tyrosine, andp-Hydroxybenzoic Acid

1942 ◽  
Vol 17 (3) ◽  
pp. 109-113 ◽  
Author(s):  
Yoshitaro Takayama ◽  
Yasuji Tsubuku
Keyword(s):  
Amino Acid ◽  
Nitric Acid ◽  
Hydroxybenzoic Acid ◽  
Related Compounds

Renal Function in Compensated Hepatic Cirrhosis: Effects of an Amino Acid Infusion and Relationship with Nitric Acid

1999 ◽  
Vol 17 (4) ◽  
pp. 235-240 ◽  
Author(s):  
A. Rodriquez ◽  
A. Martin ◽  
J.A. Oterino ◽  
I. Blanco ◽  
M. Jimenez ◽  
...  
Keyword(s):  
Renal Function ◽  
Amino Acid ◽  
Nitric Acid ◽  
Hepatic Cirrhosis ◽  
Acid Infusion ◽  
Amino Acid Infusion

Enzymic Oxidation of Amines in Decapods

1954 ◽  
Vol 31 (1) ◽  
pp. 1-7
Author(s):  
H. BLASCHKO ◽  
JEAN M. HIMMS
Keyword(s):  
Amino Acid ◽  
Amine Oxidase ◽  
Acid Oxidase ◽  
Sepia Officinalis ◽  
Amino Acid Oxidase ◽  
Enzymic Oxidation ◽  
Related Compounds ◽  
Long Chain

1. The enzyme amine oxidase has been found in many organs of Sepia officinalis and of Loligo forbesii. 2. The enzyme oxidizes not only tyramine and related compounds, e.g. p-hydroxyphenylethanolamine (‘octopamine’) and β-phenylethylamine, but also aliphatic monoarnines and long-chain diamines as well as tryptamine and 5-hydroxytryptamlne. 3. The liver of Loligo contains D-amino-acid oxidase.

Chelating polymers. I. The synthesis and acid dissociation behavior of several N-(p-vinylbenzenesulfonyl)-substituted diaminopolyacetic acid monomers, monomeric analogues, and related intermediates

1970 ◽  
Vol 48 (1) ◽  
pp. 163-175 ◽  
Author(s):  
R. M. Genik-Sas-Berezowsky ◽  
I. H. Spinner
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Dissociation Constants ◽  
Acid Dissociation ◽  
Inductive Effects ◽  
Cyclic Amide ◽  
Amino Acid Analogues ◽  
Related Compounds ◽  
Chelating Polymers ◽  
Made In

Two new chelating monomers, N-(p-vinylbenzenesulfonyl)1,2-diaminoethane-N′,N′-diacetic (SS-EDDA) and -N,N′,N′-triacetic (SS-ED3A) acids, as well as several monomeric analogues and related intermediates have been prepared. In addition, 2-oxo-1-piperazine acetic (S-KP), 3-oxo-1-piperazine acetic (U-KP), and 2-oxo-1,4-piperazine diacetic (3-KP) acids have been synthesized and the interconvertibility between these cyclic amides and their unsubstituted linear amino acid analogues, ethylene-diamine-N,N′-diacetic (S-EDDA), -N,N-diacetic (U-EDDA), and -N,N,N′-triacetic (ED3A) acids respectively, was demonstrated.The acid dissociation constants of the various amino acids were determined potentiometrically at 25° and μ = 0.1 M(KNO3) and the results were compared with the hydrogen ion affinities of related compounds. Dissociation schemes were proposed for all the compounds based on these results. Rationalizations of the linear amino acid and the cyclic amide dissociation constants were made in terms of the effects of cyclization and the inductive effects of neighboring groups. These rationalizations were found to be helpful in clarifying the dissociation schemes previously proposed for several of the linear amino acids.

STUDIES ON RDX AND RELATED COMPOUNDS: II. THE NITROLYSIS OF HEXAMINE IN ACETIC ACID

1950 ◽  
Vol 28b (11) ◽  
pp. 715-719 ◽  
Author(s):  
C. A. Winkler ◽  
M. Kirsch
Keyword(s):  
Acetic Acid ◽  
Nitric Acid ◽  
Deleterious Effect ◽  
Reaction Rate ◽  
Harmful Effect ◽  
Maximum Yield ◽  
Related Compounds

Acetic acid has a harmful effect on the reaction rate and on the yield of RDX at 1 °C. and at 30 °C. for a given nitric acid – hexamine ratio below a certain optimum value. At the optimum, however, the maximum yield of 80% is obtained at both temperatures. The deleterious effect of acetic acid may be explained by assuming that the concentration of the active nitrolyzing agent (nitracidium ion) is decreased by reaction between acetic acid and nitric acid.

Formation and occurrence of N-malonylphenylalanine and related compounds in plants

1968 ◽  
Vol 46 (8) ◽  
pp. 797-806 ◽  
Author(s):  
N. Rosa ◽  
A. C. Neish
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Glutamic Acid ◽  
Plant Species ◽  
Isolation Procedure ◽  
Plant Kingdom ◽  
Feeding Experiments ◽  
Leucine Isomers ◽  
Related Compounds

Shoots of barley seedlings when fed D-phenylalanine convert the amino acid to N-malonylphenylalanine. Some N-acetylphenylalanine is obtained at the same time but this may be an artifact of the isolation procedure since it is readily formed by decarboxylation of the malonylphenylalanine. Feeding experiments with the D- and L-isomers of phenylalanine, valine, leucine, isoleucine, tyrosine, tryptophan, alanine, and glutamic acid showed that barley shoots form the malonyl derivative from all the D-isomers whereas little, if any, is formed from the L-isomers. Similar experiments with phenylalanine and leucine isomers, using seven different plant species, showed that the ability to conjugate the D-isomers (but not the L-isomers) was found in all of the plants tested. It was also observed that the ether-soluble acidic conjugates of a variety of amino acids, possibly malonyl derivatives, occur widely throughout the plant kingdom.

STUDIES ON LIGNIN AND RELATED COMPOUNDS: IV. THE NITRATION OF GLYCOL-LIGNIN

1930 ◽  
Vol 3 (2) ◽  
pp. 130-139 ◽  
Author(s):  
Harold Hibbert ◽  
Leo Marion
Keyword(s):  
Nitric Acid ◽  
Acetic Anhydride ◽  
Nitro Group ◽  
Nitroso Compound ◽  
Initial Oxidation ◽  
Percentage Composition ◽  
Acidic Component ◽  
Fuming Nitric Acid ◽  
Related Compounds

Glycol-lignin at temperatures below 0 °C., dissolves completely in a mixture of four parts of acetic anhydride and one part of fuming nitric acid, giving rise to a 125% yield of a product (nitrated-lignin) which has undergone nitration and acetylation. The nitrogen in the product is present partly in the form of a nitro group, an ester of nitric acid, a nitroso compound and in another form not yet determined. A further treatment of this nitrated-lignin with a nitrating liquor of the same composition, followed by heating at 80 °C. causes a short initial oxidation, and yields a substance differing slightly from the first and having a C:H ratio almost 1:1. Repetition of the treatment does not seem to alter the percentage composition appreciably, until after the fourth treatment.Nitrated-lignin can be methylated, the methoxyl content of the product being more than double that of the original nitrated-lignin. It can also be reduced, the resulting product diazotized and coupled with β-naphthol disulphonic acid.The soluble products of the nitration reaction contain an acidic component which has not been identified.

Sign in / Sign up

Export Citation Format

Share Document