نتایج جستجو برای: diacetyl
تعداد نتایج: 1010 فیلتر نتایج به سال:
The mol-ecule of the title compound, C(23)H(23)N(3), which was synthesized by the condensation reaction between 2,6-diacetyl-pyridine and 2-dimethyl-aniline, adopts an E configuration about both C=N imine bonds. The dihedral angles formed by the benzene rings with the pyridine ring are 89.68 (5) and 53.62 (6)°.
Citation Allen, Joseph G., Skye S. Flanigan, Mallory LeBlanc, Jose Vallarino, Piers MacNaughton, James H. Stewart, and David C. Christiani. 2015. “Flavoring Chemicals in E-Cigarettes: Diacetyl, 2,3-Pentanedione, and Acetoin in a Sample of 51 Products, Including Fruit-, Candy-, and Cocktail-Flavored E-Cigarettes.” Environmental Health Perspectives 124 (6): 733-739. doi:10.1289/ehp.1510185. http:...
1:40 p.m. – 2:00 p.m. DIACETYL INCREASES SENSORY INNERVATION AND SUBSTANCE P PRODUCTION IN RAT TRACHEA M.P. Goravanahally^, A.F. Hubbs, J.S. Fedan, M.L. Kashon, L.A. Battelli, R.R. Mercer, W.T. Goldsmith, M.C. Jackson, A. Cumpston, D.G. Frazer, and R.D. Dey National Institute for Occupational Safety and Health, CDC and West Virginia University, Morgantown, WV
A new diacetyl triterpene lactone, drosericarpone (2), was isolated from the hexane extract of the herb Cleome droserifolia, together with buchariol (1, a sesquiterpene oxide, isolated for the first time from Cleome species) and stigmasterol glucoside (3). The structures of 1-3 were identified by spectroscopic means.
This case involves a 36 year old non-smoker who worked in a factory producing food flavourings for potato crisps. He developed exertional breathlessness associated with fixed airway obstruction shortly after an uncharacteristically high exposure to the food flavouring chemical diacetyl. Unfortunately, even though he was removed from further exposure to this agent, his symptoms and spirometry di...
The structure of cotylenin A, a potent plant-growth stimulant with the most complex molecule in cotylenins from Cladosporium fungus sp. 501-7W, was analyzed again by HMBC experiments and X-ray crystallography of its diacetyl-dihydroderivative. The previously proposed stereostructure of cotylenin A was thus completely confirmed.
Levels of histone acetylation and phosphorylation have been contrasted in two developmental states of Drosophila melanogaster. The 0-2 h nuclei of the syncitial blastula are characterized by rapid mitoses and DNA replication, but there is very little transcription. In the 18 h embryo there is considerable transcription and the mitotic rate is much slower. It has been found that (1) histone H1 f...
IN RECENT YEARS the automated diacetyl monoxime (DAM) reaction as adapted to the AutoAnalyzer has become the method of choice in many clinical laboratories for the determination of urea in biologic fluids. The method is based on the condensation of urea with diacetyl, the latter usually being liberated from the monoxime in the presence of one of various acid reagents (1, 2). The reaction, howev...
Goat milk, a highly nutritious product is widely used in cheese making. In order to properly select suitable milk samples for production, fifty-five of raw goat’s were collected from eight farms the North-West Morocco analyze their counts various mesophilic bacteria and determining physicochemical characteristics during different seasons year. Lactic acid (LAB) isolated, identified, screened se...
Mononuclear and dinuclear ruthenium(III) complexes with bis-β-diketonato ligands (denoted by [Ru(acac)(2)(L-LH)] and [Ru(acac)(2)(L-L)Ru(acac)(2)], respectively) were synthesized, where acac, L-LH(-) and L-L(2-) denote acetylacetonato, monoprotonated and unprotonated bis-β-diketonato ligands, respectively. The following three ligands were used as the bis-β-diketonato ligand (L-L(2-)): 1,2-diace...
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