Urine from patients with ketoacidosis was found to contain a number of aliphatic 3-hydroxy dicarboxylic acids. The acids were purified by silicic acid chromatography and their structures determined by gas chromatography-mass spectrometry of different derivatives. The major compound was 3-hydroxydecanedioic acid. Minor compounds were 3-hydroxyoctanedioic acid, 3-hydroxyoctenedioic acid, 3-hydrox...

clinical differential diagnosisthe organic acidemias are important in the differential diagnosis of metabolic and neurologic derangement in the neonate and of new-onset neurologic signs in the older child. a-organic aciduriaseveral disorders, not classified as primary disorders of organic acid metabolism, have a characteristic urinary organic acid profile that suggests the appropriate diagnosis...

Titanocene and zirconocene ketene acetal derivatives have been prepared by reaction of the respective metallocene dichloride with the lithium enolate of isobutyric acid methyl ester. The crystal structure of (CsH s),Ti(CDOC(OCH 3):C(CH 3) is reported.

245 words Tables: 6 Figures: 14 Abbreviations: ACh: acetylcholine; AMPA: -Amino-3-hydroxy-5-methyl-4isoxazolepropionic acid; DHPG: 3,4-Dihydroxyphenylglycine; DOPAC: 3,4Dihydroxyphenylacetic acid; GABA: gamma aminobutyric acid; 5-HT: 5-hydroxytryptamine or serotonin; 5-HIAA: 5-hydroxyindolacetic acid; LY341495: (2S)-2-amino-2-[(1S,2S)-2-carboxycycloprop-1-yl]-3-(xanth-9-yl) propanoic acid; mGl...

Abstract Invited for this month's cover picture is the group of synthetic and physical chemists from Czech Academy Sciences. The shows electrochemical dechlorination polychlorinated derivatives bicyclo[1.1.1]pentane‐1,3‐dicarboxylic acid. Read full text Article at 10.1002/celc.202100372 .

245 words Tables: 6 Figures: 14 Abbreviations: ACh: acetylcholine; AMPA: -Amino-3-hydroxy-5-methyl-4isoxazolepropionic acid; DHPG: 3,4-Dihydroxyphenylglycine; DOPAC: 3,4Dihydroxyphenylacetic acid; GABA: gamma aminobutyric acid; 5-HT: 5-hydroxytryptamine or serotonin; 5-HIAA: 5-hydroxyindolacetic acid; LY341495: (2S)-2-amino-2-[(1S,2S)-2-carboxycycloprop-1-yl]-3-(xanth-9-yl) propanoic acid; mGl...

[1] Computation of phase and chemical equilibria of water-organic-inorganic mixtures is of significant interest in atmospheric aerosol modeling. A new version of the phase partitioning model, named UHAERO, is presented here, which allows one to compute the phase behavior for atmospheric aerosols containing inorganic electrolytes and organic compounds. The computational implementation of the mod...

BACKGROUND Methylmalonic acid (MMA) is a dicarboxylic acid whose concentration can be increased in blood and urine in patients with an inborn error of metabolism or vitamin B(12) deficiency. We developed a method for the selective analysis of dicarboxylic acids that exploits the high specificity of tandem mass spectrometry (MS/MS) and the substantial difference in fragmentation patterns of the ...

UNLABELLED BACKGROUND Friedel-Crafts acetylation is an important route to aromatic ketones, in research laboratories and in industry. The acetyl derivatives of 3,3'-dimethylbiphenyl (3,3'-dmbp) have applications in the field of liquid crystals and polymers and may be oxidized to the dicarboxylic acids and derivatives that are of interest in cancer treatment. FINDINGS The effect of solvent ...