Results 191 to 200 of about 14,235 (228)
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Gas chromatographic determination of 1,2-propanediol dinitrate in blood
Journal of Chromatography A, 1982A method is described for determination of 1,2-propanediol dinitrate in blood at concentrations ranging from 10 ng/ml up to 25,000 ng/ml. It used double ether extraction with manual shaking in order to complete sample preparation within 5 min. Samples are analyzed via gas chromatography-electron-capture detection using a column of 3% base deactivated ...
S D, Erk +3 more
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Stability of the amorphous state in the system water—1,2-Propanediol
Cryobiology, 1979Abstract For the same water contents, the stability of the wholly amorphous state of the aqueous solutions of 1,2-propanediol is much greater than that for all the solutions previously studied by us with glycerol, dimethylsulfoxide, ethanol, and ethylene glycol. To the degree that cyroprotection is related to that stability, 1,2-propanediol should be
P, Boutron, A, Kaufmann
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The effects of 1,2-propanediol as a cryoprotectant on the freezing of mouse oocytes
Theriogenology, 1988Cryopreservation of mammalian eggs has been successfully accomplished using 1,2-propanediol (PG). Effects of holding times of 0 and 30 min at -40 degrees C and storage times of 1 d and 1 mo at -196 degrees C were investigated in combination with various concentrations of PG (1.0, 1.5, and 2.0M) to determine the survival and fertilizability of mouse ...
Y, Ko, W R, Threlfall
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Conformation and hydrogen bond in 1,2-propanediol
Journal of Molecular Spectroscopy, 1981Abstract The high-resolution microwave spectrum of two conformations, each with an internal hydrogen bond has been observed for the four possible H D isotopic species of 1,2-propanediol. In both rotamers the hydroxyl in position 1 acts as proton donor to the oxygen in position 2, whose hydrogen is trans with respect to the C 1 C 2 bond. In
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Metabolic engineering of 1,2-propanediol pathways in Corynebacterium glutamicum
Applied Microbiology and Biotechnology, 2011We analyzed 1,2-propanediol (1,2-PD) production in metabolically engineered Corynebacterium glutamicum. Wild-type C. glutamicum produced 93 μM 1,2-PD after 132 h incubation under aerobic conditions. No gene encoding the methylglyoxal synthase (MGS) which catalyzes the first step of 1,2-PD synthesis from the glycolytic pathway was detected on the C ...
Satoko, Niimi +3 more
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Microbial formation, biotechnological production and applications of 1,2-propanediol
Applied Microbiology and Biotechnology, 2001This short review covers metabolic pathways, genetics and metabolic engineering of 1,2-propanediol formation in microbes. 1,2-Propanediol production by bacteria and yeasts has been known for many years and two general pathways are recognized. One involves the metabolism of deoxyhexoses, where lactaldehyde is formed during the glycolytic reactions and ...
G N, Bennett, K Y, San
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Interactions between 1,2‐Propanediol (Propylene Glycol) and Hexobarbital
Acta Pharmacologica et Toxicologica, 1979AbstractThe interaction between 1,2‐propanediol and hexobarbital was studied with an anaesthesia threshold method, where hexobarbital is infused intravenously. The dose needed to obtain a burst suppression of one second or more is determined and given as per cent of a pre‐experimental value obtained in the same rat.
A, Osterlind, A, Akesson, G, Wahlström
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Determination of 1,2-propanediol in silage
Journal of Separation Science, 2002Armin Bareth +2 more
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