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Showing 1 to 20 of 28 for “"Glyoxal"”.
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Effect of concentration of glutaraldehyde and glyoxal on binding lysozyme to zein based films to control foodborne pathogens in tomatoes
… tomatoes. The study uses glutaraldehyde and glyoxal as binding agents to immobilize the enzyme on the packaging film. The effect of concentration of glutaraldehyde and glyoxal on the controlled release of the enzyme was studied. Concentrations of 0.1 and 0.2 g/g lysozyme: cross linking agent …
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High-resolution spectroscopic investigations of rovibrational state mixing in ground electronic states
… ground electronic state of the molecules methyl glyoxal and methyl formate are presented. The technique of Stimulated Emission Pumping (SEP) spectroscopy is used to examine the effect of an intramolecular van der Waals interaction on intermode coupling of the carbonyl vibrational modes in methyl …
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Argininderivatisierung und 1,2-Dicarbonylverbindungen in Lebensmitteln
… von 1,2-Dicarbonylverbindungen in Lebensmitteln Glyoxal (GO), Methylglyoxal (MGO), 3-Desoxyglucosulose (3-DG) und 3-Desoxypentosulose (3-DPs) konnten nach Umsetzung mit o-Phenylendiamin erstmals in Milch- und Milchprodukten quantifiziert werden. Für Glyoxal wurden Gehalte von 0,06 bis 3,5 mg/ l …
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The Development of Gelatin Based Tissue Adhesives for Use in Soft Tissue Biomedical Applications
… with altered weight content of water and glyoxal (a dialdehyde) were utilized. The adhesive formulations were characterized by pH and gelation time in situ, and absorption/desorption of water in the formed resin. Thermal analysis, mechanical testing, and lap shear adhesive bond testing …
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Quantum Beat Spectroscopy and Radiationless Transitions
… fluorescence excitation spectra of the series glyoxal-h(,2), methylglyoxal-h(,4), methylglyoxal-d(,4), biacetyl-h(,6), and 2,3-pentanedione-h(,8) at high resolution show that except for glyoxal these molecules undergo a characteristic structural deformation during the electronic transition. Our …
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Chemical Studies on Nucleic Acid Analogues
… the products of guanine modification with both glyoxal (an (alpha)-dialdehyde) and methylmalondialdehyde (a (beta)-dialdehyde) from a common precursor in four and eight steps, respectively, using a sequence which allows us to distinguish between the two potential structural isomers. For each …
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A DOAS Study on the Oxidation Mechanism of Aromatic Hydrocarbons under Simulated Atmospheric Conditions
… Phenole und Aldehyde von p-Xylol und TMB) sowie Glyoxal (von BTX) wurden bestimmt. Der Phenol-Yield aus Benzol (F(PHEN) = 53) wurde zu mehr als dem doppelten des Literaturwertes bestimmt. Weiterhin wurde der Ringspaltungsmechanismus über das Bicycloalkyl-Radikal als einer der Hauptwege in der …
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Untersuchungen zur Bildung von Furosin und N-terminalen 2(1H)-Pyrazinonen
… und 37°C) untersucht. Bei der Reaktion von Glyoxal mit ausgewählten Tripeptiden wurde eine sehr schnelle Derivatisierung der Peptide und jeweils die gleichzeitige Bildung eines definierten Produktes festgestellt. Mittels nuklearmagnetischer Resonanzspektroskopie und massenspektroskopischer …
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The versatile E. coli adaptive response protein AlkB mitigates toxicity and mutagenicity of etheno-, ethano-, and methyl-modified bases in vivo
… and finally releases the two-carbon bridge as glyoxal, restoring the unadducted adenine or cytosine. Thus, the AlkB protein bridges the repair of alkylative lesions with those induced by oxidative stress and embodies the multi-faceted protection required to preserve genomic stability and coding …
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Design and Synthesis of Mitochondrial Uncouplers for the Treatment of Mitochondrial Dysfunction
… novel prodrug approach for BAM15 by utilizing a glyoxal cage. In doing so, we aim to achieve an improved pharmacokinetic property. These developments showcase the potential use of a mitochondrial uncouplers for the treatment of mitochondrial dysfunction and metabolic disease.
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Rovibrational State Mixing in Isolated Ground Electronic State Polyatomic Molecules
… rovibrational state mixing model. SEP spectra of glyoxal are recorded in the regions of C = 0 stretch fundamental and its overtones by employing X($\sp1$A$\sb{\rm g}$) $\gets$ A($\sp1$A$\sb{\rm u}$) rovibronic transitions up to energies of 7000 cm$\sp{-1}$ above the ground vibrational state. At …
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Cyclic nitrones: oxidation studies and the synthesis of a heterocyclic nitrone
… with cleavage of the ether band, yielding glyoxal osazones. The same nitrone was very rapidly oxidised to 4-hydroxy-3-morpholone by ferric chloride. This cyclic hydroxamic acid underwent further oxidation at a slower rate, ultimately yielding diglycollic acid and nitrous oxide. …
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Flavor development in lactic fermentation of ultrafiltered cottage cheese whey
… to fermentation increased the production of glyoxal, methylglyoxal, and diacetyl as detected by high performance liquid chromatography.</p>
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Spectroscopic Studies of Molecular Conformations
… crotonaldehyde, acrolein, acryloyl fluoride, glyoxal and oxalyl chloride.<br/><br/>These results enable a better understanding of vibrational spectra and provide quantitative data which characterises conformational equilibria in these compounds in terms of thermodynamic equilibria.<br/>
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Aqueous-phase Organic Chemistry in the Atmosphere
… monitor aqueous-phase OH oxidation of glyoxal and methylglyoxal. Quantification of all the major reaction products was achieved, permitting complete reaction mechanisms to be presented. An unexpected class of compounds, α-hydroxyhydroperoxide (α-HHP), was observed during the …
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Structure-function studies of the Parkinsonism-linked protein DJ-1
… A107P mutation on DJ-1 structure and glyoxalase activity. The A107P variant abrogates the ability of DJ-1 to protect against glyoxal-induced cytotoxicity and carboxymethyllysine protein modification. A crystal structure of DJ-1 C106S variant with glycerol and sulphate bound in the …
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Advanced glycation end product precursors in diabetes: a crucial link between oxidative stress and inflammation?
… reactive α-dicarbonyls are formed, such as glyoxal (GO) and methylglyoxal (MG). These α-dicarbonyls are present at elevated concentrations in diabetes, and are frequently implicated in the initiation and progression of diabetic complications. Previous research has linked α-dicarbonyls with …
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Tetraazamacrocyclic ligands and their copper complexes
… the condensation of the cyclic tetraamines with glyoxal. A group of 20,21 and 22-membered sexadentate ligands having N402 donor sets, and 20-membered ligands with N4S2 and N6 donor sets have also been studied; e.g.: 12,13,25,26,27,28-Hexahydrotetrabenzo (e,i,o,s) (11,14,1,4,8,17) …
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The effect of brewer’s spent grain melanoidins on the formation of Maillard reaction products in food model systems
… grain melanoidins (4 mg/mL) quenched over 95% of glyoxal (GO) and methylglyoxal (MGO), and more than 80% of 2,3-butanedione after a 7-day incubation at 37 °C. This was attributed to the hydroxyalkylation reaction, as determined by liquid chromatography highresolution tandem mass spectrometry …
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