نتایج جستجو برای: acetyl groups

تعداد نتایج: 752147  

Journal: :Starch-starke 2023

Abstract Chemical modification of starch from the chayote root ( Sechium edule Jacq) is carried out with lauric acid and acetic anhydride. The modified characterized by Fourier‐transform infrared spectrometry (FTIR), X‐ray diffraction (XRD), Differential Scanning Calorimetry (DSC) used to formulate edible films. developed films are based on their physicochemical mechanical properties. functiona...

2016
Giovanna Traina

A large body of evidence points to the positive effects of dietary supplementation of acetyl-Lcarnitine (ALC). Its use has shown health benefits in neuroinflammation, which is a common denominator in a host of neurodegenerative diseases. ALC is the principal acetyl ester of L-Carnitine (LC), and it plays an essential role in intermediary metabolism, acting as a donor of acetyl groups and facili...

2015
Anna-Maria T. Baumann Mark J. G. Bakkers Falk F. R. Buettner Maike Hartmann Melanie Grove Martijn A. Langereis Raoul J. de Groot Martina Mühlenhoff

Sialic acids, terminal sugars of glycoproteins and glycolipids, play important roles in development, cellular recognition processes and host-pathogen interactions. A common modification of sialic acids is 9-O-acetylation, which has been implicated in sialoglycan recognition, ganglioside biology, and the survival and drug resistance of acute lymphoblastic leukaemia cells. Despite many functional...

Journal: :The Biochemical journal 1972
T N Pattabiraman W B Lawson

Subtilisin BPN' hydrolysed N-acetyl-l-3-(2-naphthyl)-alanine methyl ester, N-acetyl-l-leucine methyl ester and N-acetyl-l-valine methyl ester, faster than alpha-chymotrypsin. Of eight ;locked' substrates tested, only methyl 5,6-benzindan-2-carboxylate was hydrolysed faster by subtilisin, whereas the other esters were better substrates for chymotrypsin. Compared with the values for chymotrypsin,...

Journal: :The Biochemical journal 1966
J Booth

1. N-Hydroxyacetamidoaryl compounds (hydroxamic acids) are metabolites of arylamides, and an enzyme that transfers the acetyl group from these derivatives to arylamines has been found in rat tissues. The reaction products were identified by thin-layer chromatography and a spectrophotometric method, with 4-amino-azobenzene as acetyl acceptor, was used to measure enzyme activity. 2. The acetyltra...

Journal: :Journal of lipid research 2010
Maria Podbielska Somsankar Dasgupta Steven B Levery Wallace W Tourtellotte Heidi Annuk Anthony P Moran Edward L Hogan

Fast migrating cerebrosides (FMC) are derivatives of galactosylceramide (GalCer). The structures of the most hydrophobic FMC-5, FMC-6, and FMC-7 were determined by electrospray ionization linear ion-trap mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy complementing previous NMR spectroscopy and gas chromatography-mass spectrometry to be 3-O-acetyl-sphingosine-GalCer der...

2011
Hideyuki Tabata Tsunehisa Okuno

The title compound, C(22)H(16)N(2), is the first example of an ynamine with H atoms bonded to the terminal C atoms. The environment around each N atom is almost planar. The distances of the N atoms from a least squares plane fitted through each N atom and the surrounding three C atoms, are 0.087 (3) and 0.041 (4) Å. The dihedral angles between these two planes and the central phenyl-ene ring ar...

Journal: :Microbiology 1998
H M Sealy-Lewis V Fairhurst

Acetate-non-utilizing mutants in Aspergillus niger were selected by resistance to 1.2% propionate in the presence of 0.1% glucose. Mutants showing normal morphology fell into two complementation groups. One class of mutant lacked acetyl-CoA synthetase but had high levels of isocitrate lyase, while the second class showed reduced levels of both acetyl-CoA synthetase and isocitrate lyase compared...

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