Results 101 to 110 of about 3,949 (150)
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Picolinic acid hydroxylase of Arthrobacter picolinophilus
Canadian Journal of Microbiology, 1974Picolinic 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
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Investigation of Picolinic Acid Extraction by Trioctylamine
International Journal of Chemical Reactor Engineering, 2011Picolinic acid is a pyridine compound with a carboxyl side chain at the 2-position. It is an isomer of nicotinic acid, which has the carboxyl side chain at the 3-position. Picolinic acid acts as a chelating agent of elements such as chromium, zinc, manganese, copper, iron, and molybdenum in the human body.
Tuyun, Amac Fatih, Uslu, Hasan
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Reductions of picolinic acid and dipicolinic acid at mercury cathodes
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1975Summary Picolinic acid and dipicolinic acid have been successfully reduced to the corresponding alcohols by controlled potential electrolysis at mercury cathodes in slightly acidic aqueous buffer solutions.
O.R. Brown, J.A. Harrison, K.S. Sastry
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Catalysis Letters, 1998
Heterogeneous oxidation of 2-picoline over binary P–Ti, Sb–Ti, P–Sb, and V–Ti oxide catalysts was studied over the temperature range of 200–300°C. The vanadium–titanium catalysts based on titanium dioxide (anatase) were found to be the most selective for picolinic acid.
E.M. Al'kaeva +3 more
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Heterogeneous oxidation of 2-picoline over binary P–Ti, Sb–Ti, P–Sb, and V–Ti oxide catalysts was studied over the temperature range of 200–300°C. The vanadium–titanium catalysts based on titanium dioxide (anatase) were found to be the most selective for picolinic acid.
E.M. Al'kaeva +3 more
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6-Phosphoryl Picolinic Acids as Europium and Terbium Sensitizers
Inorganic Chemistry, 2011Three 6-phosphoryl picolinic acid (6PPA) derivatives were synthesized and used as europium and terbium sensitizers. Two of the three ligands (6-diethoxyphosphoryl picolinic acid (Hdeppa) and 6-monoethoxyphosphoryl picolinic acid (H(2)meppa)) are water-soluble, once complexed to lanthanide ions, while the third (6-dihydroxyphosphoryl picolinic acid (H(3)
Andres, Julien, Chauvin, Anne-Sophie
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Picolinic acid as a matrix for laser mass spectrometry of nucleic acids and proteins
Rapid Communications in Mass Spectrometry, 1994Abstract We found that picolinic acid is a very good matrix for matrix‐assisted laser desorption/ionization (MALDI) time‐of‐flight mass spectrometry of oligonucleotides, proteins and tRNA. Among the oligonucleotides, picolinic acid was shown to be effective for homo‐oligonucleotides, d(G) 40
K, Tang +5 more
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Journal of Organometallic Chemistry, 1991
Two types of complexes of diorganotin picolinates (i) R2Sn(Pic)2 [2:1] and (ii) [R2SnPic]2O [1:1] and of diorganotinpicolinate N-oxides (i) R2Sn(PicO)2 [2:1] and (ii) [R2SnPicO]2O [1:1] (R = CH3, n-C4H9, n-C8H17, C6H5CH2) have been prepared by reacting picolinic acid and picolinic acid N-oxide with diorganotin oxide in 2:1 and 1:1 ligand:metal molar ...
G.K. Sandhu, N.S. Boparoy
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Two types of complexes of diorganotin picolinates (i) R2Sn(Pic)2 [2:1] and (ii) [R2SnPic]2O [1:1] and of diorganotinpicolinate N-oxides (i) R2Sn(PicO)2 [2:1] and (ii) [R2SnPicO]2O [1:1] (R = CH3, n-C4H9, n-C8H17, C6H5CH2) have been prepared by reacting picolinic acid and picolinic acid N-oxide with diorganotin oxide in 2:1 and 1:1 ligand:metal molar ...
G.K. Sandhu, N.S. Boparoy
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Role of zinc in blockade of excitotoxic action of quinolinic acid by picolinic acid
Amino Acids, 1998This study examined whether picolinic acid (PIC) inhibits quinolinic acid (QUIN)-induced excitotoxicity through zinc chelation. Injection of QUIN into the nucleus basalis magnocellularis significantly depleted cortical choline acetyltransferase activity 7 days post injection and PIC inhibited this response. Zinc augmented the QUIN- but not NMDA-induced
K H, Jhamandas +3 more
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Zinc Absorption in Cattle with a Dietary Picolinic Acid Supplement
The Journal of Nutrition, 1981The effect of picolinic acid and hydroxyquinolines in intestinal zinc absorption of cattle was studied. In contrast to reports of the absorption in rat and in man, picolinic acid did not enhance zinc absorption in cattle. In two calves suffering from Adema disease, the bovine parallel to Acrodermatitis enteropathica, hydroxyquinoline supplementation ...
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Macrophage Activating Properties of The Tryptophan Catabolite Picolinic Acid
2003Recent studies have suggested a role for aminoacid catabolites as important regulators of macrophage (Mphi) activities. We reported previously that picolinic acid (PA), a tryptophan catabolite produced under inflammatory conditions and a costimulus with IFNgamma of Mphi effector functions, is a selective inducer of the Mphi inflammatory protein-1alpha (
Maria Carla, Bosco +5 more
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