Results 201 to 210 of about 5,118,399 (260)

Speciation studies of binary and ternary complexes formed with oxidovanadium(IV) ion picolinic acid and some amino acids

Physics and chemistry of liquids (Print), 2020
In the present work the chemical speciation of ternary complexes systems formed by VO2+ ion with picolinic acid and the amino acids = α-alanine (HαAla), glycine (HGly), serine (HSer), threonine (HThr), aspartic acid (H2Asp), glutamic acid (H2Glu ...
Joel De Abreu, Edgar Del Carpio, Waleska Madden, G. Lubes, M. L. Araujo, V. Lubes, Lino Hernández   +6 more
semanticscholar   +1 more source

Transition-metal-free decarboxylative halogenation of 2-picolinic acids with dihalomethane under oxygen conditions

Green Chemistry, 2019
The reaction of 2-picolinic acids with dihalomethane proceeded smoothly via N-chlorocarbene intermediates to afford 2-halogen-substituted pyridines in satisfactory to excellent yields under oxygen conditions.
Xitao Zhang, Xiujuan Feng, Haixia Zhang, Yoshinori Yamamoto, M. Bao   +4 more
semanticscholar   +1 more source

Transition-Metal-Free Decarboxylative Arylation of 2-Picolinic Acids with Arenes under Air Conditions.

Organic Letters, 2018
A facile, transition-metal-free, and direct decarboxylative arylation of 2-picolinic acids with simple arenes is described. The oxidative decarboxylative arylation of 2-picolinic acids with arenes proceeds readily via N-chloro carbene intermediates to ...
Xitao Zhang, Xiujuan Feng, Chuancheng Zhou, Xiaoqiang Yu, Yoshinori Yamamoto, M. Bao   +5 more
semanticscholar   +1 more source

Binary and ternary nickel (II) complexes with picolinic acid and several amino acids

, 2020
In this work, we present the results from a chemical speciation study of binary and ternary complexes formed by Ni(II) ion with picolinic acid and the amino acids = Arginine (HArg), Tryptophan (HTrp), Asparagine (HAsn), Glutamine (HGln), Lysine (HLys ...
A. Paz, I. Caceres, Y. Fakhri, Y. Henríquez, M. L. Araujo, V. Lubes, Lino Hernández   +6 more
semanticscholar   +1 more source

The Preparation of Isonicotinic and Picolinic Acids

Journal of the American Chemical Society, 1952
D. J. Cook, Roland S. Yunghans
openaire   +2 more sources

Picolinic acid hydroxylase of Arthrobacter picolinophilus

Canadian Journal of Microbiology, 1974
Picolinic acid is oxidized by cells and extracts of Arthrobacter picolinophilus to 6-hydroxypicolinic acid. The enzyme involved is a particulate hydroxylase which appears to incorporate the hydroxyl group of water into the substrate. The enzyme was purified about 60-fold.
R L, Tate, J C, Ensign
openaire   +2 more sources

Immunobiology of Picolinic Acid

1996
Exposure of various cell types to IFN results in increased enzymatic activities leading to the breakdown of tryptophan and evidence exists to suggest that the catabolism of tryptophan may be connected to the biological effects of interferon (Carlin et al., 1989.
G, Melillo, M C, Bosco, T, Musso, L, Varesio   +3 more
openaire   +2 more sources

THE CRYSTAL STRUCTURE OF PICOLINIC ACID

Chemistry Letters, 1973
Abstract The crystal structure of picolinic acid was determined by a three-dimensional X-ray analysis. The molecules are linked by two symmetric double minimum hydrogen bonds with a small potential barrier, N–H–N and O–H–O,and form a zig-zag chain.
Fusao Takusagawa, Akira Shimada
openaire   +1 more source

Picolinic Acid in Acrodermatitis Enteropathica

Journal of Pediatric Gastroenterology and Nutrition, 1984
SummaryThree children with acrodermatitis enteropathica (AE) were treated with oral zinc dipicolinate (zinc‐PA). The daily dose of zinc required to prevent exacerbations, when administered as the dipicolinate complex, was one‐third the minimum amount of zinc required as the sulfate salt. The concentration of picolinic acid in the plasma of asymptomatic
I, Krieger, R, Cash, G W, Evans
openaire   +2 more sources

A Picolinic Acid Derivative: A Plant Growth Regulator

Science, 1963
4-Amino-3,5,6-trichloropicolinic acid is more toxic to many broad-leaved plants than 2,4-dichlorophenoxyacetic acid and 2,4,5-trichlorophenoxyacetic acid. It is comparable in absorption by foliage, in translocation, and in soil-leaching characteristics; in soil, however, it retains its activity for a longer time.
J W, Hamaker, H, Johnston, R T, Martin, C T, Redemann   +3 more
openaire   +2 more sources