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Showing 1 to 20 of 380 for “"Aldehyde"”.
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Microbial engineering for aldehyde synthesis
… instead of from finite petroleum reserves. Aldehydes represent a class of chemicals that has been challenging to obtain using microbes given the rapid conversion of aldehydes into their corresponding alcohols that occurs naturally. Microbes are thought to have evolved numerous endogenous …
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Chalcone derivatives from pyrrole-2-aldehyde
… in 1881 by condensing acetophenone with benzaldehyde using sodium methoxide as a condensing agent. Chalcone and its derivatives have been prepared primarily as intermediates for the synthesis of anthocyanins and other related pigments.</p><p>In recent years extensive preparation and study of …
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Aldehyde Treatment of Soybean Meal for Ruminants
Made available in DSpace on 2015-05-12T22:35:47Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7121208.PDF: 4161948 bytes, checksum: 15f4f33d14a28e9f3e5b0250398e99fb (MD5) Previous issue date: 1971
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Targeting Aldehyde Dehydrogenases in NF2-null Meningioma and Schwannoma
… caused by NF2 loss, drives overexpression of aldehyde dehydrogenase 1A1 (ALDH1A1) in NF2-null schwannoma. High expression of ALDH1A1, and the related isoform ALDH1A3 have been identified as markers of cancer stem cell activity and have been correlated with poor prognosis and chemoresistance in …
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Immune Responses Aginst Aldehyde Modified Extracellular Matrix in Atherosclerosis
… The oxidation of LDL generates reactive aldehydes, including malondialdehyde (MDA) that modifies ApoB in LDL. Immune responses against MDA-modified epitopes on ApoB have been shown to be linked to atherosclerotic disease. This thesis is focused on the possibility that LDL oxidation result …
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Rearrangements of 1-Heterosubstituted Chrysanthemyl Aldehyde and Chrysanthemyl Amines
One theory concerning the mechanism for the conversion of presqualene pyrophosphate to squalene involves postulation of a new intermediate (known locally as protosqualene pyrophosphate) which is a ring expanded analog of presqualene pyrophosphate. There is no direct evidence for this discrete new …
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Dielectric studies of aldehyde group relaxation in some aromatic aldehydes
… made of a1dehyde group relaxation of aromatic aldehydes in a polystyrene matrix. For aldehyde group relaxation in terephtha1dehyde, the Eyring parameters are 6H -1 E = 29.3 kJ mol and 6S -1 -1 E = 15.1 JK mol • We found that changing the medium from polystyrene to polypropylene or polyethylene …
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Aldehyde-driven transcriptional stress triggers an anorexic DNA damage response
… against the endogenous toxic metabolite, formaldehyde. We find that endogenous formaldehyde impedes transcription, requiring repair via Cockayne Syndrome B (CSB). Mice deficient in formaldehyde clearance (Adh5-/-) and CSB (Csbm/m) develop cachexia, neurodegeneration and succumb to kidney …
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Low-grade aldehyde stress protects mice from diet-induced obesity
… many endogenous sources of genotoxic stress are aldehydes, reactive metabolites that have been shown to cause interstrand crosslinks and transcriptional stress. In this work, the response to aldehyde stress of different strengths and in various contexts is analysed, which reveals the specificity …
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Activating Aldehyde C-H Bonds: Applications to Hydroacylation and Transfer Hydroformylation
… for these reactions and they readily activate aldehyde C-H bonds to generate acyl-rhodiumIII-hydrides. Developing strategies to control the reactivity of these oxidative addition products enables developments in hydroacylation and hydroformylation. Chapter 1 describes a cooperative catalysis …
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Aromatic alcohol oxidase, aldehyde oxidase and mannitol oxidase in terrestrial gastropods
… to be localised in the endoplasmic reticulum. Aldehyde oxidase activity was considered in relation to its possible role in the further utilisation of the products of aromatic alcohol oxidase. It is a soluble cytosolic activity. Gastropod aldehyde oxidase is active with a variety of aldehydes …
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On the Stereochemistry of Allylmetal-Aldehyde Condensations (Allyltrimethylsilane, Allyltributylstannane, Homoallylic Alcohols)
… course of the intramolecular allylmetal-aldehyde condensation of allylsilane 3a, allylstannane 3b, and pentadienylsilane 6 has been investigated. A modest preference for the syn isomer 4 arising from a synclinal orientation of double bonds was observed with the Lewis acid catalyzed …
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A small molecule-guided structure-function exploration of mitochondrial aldehyde dehydrogenase
… the observed enhancement of human small aldehyde metabolism by kudzu flowers. First, we selected mitochondrial aldehyde dehydrogenase 2 (ALDH2) as a representative enzyme for small aldehyde metabolism. We subsequently identify one kudzu flower-derived isoflavone, kakkalide, that is able …
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Synthese aliphatischer Aldehyde durch fotokatalytische Dehydrierung von Alkanen und Hydroformylierung mit Kohlendioxid
… von CO2-Emissionen. Für die Herstellung von Aldehyden ist, an Stelle der direkten Hydroformylierung von Olefinen mit Synthesegas, die Nutzung von Sonnenenergie zur fotokatalytischen Dehydrierung von Alkanen und anschließender Hydroformylierung mit CO2 denkbar. Diese Arbeit beschreibt …
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Specificity of aldehyde oxidase towards N-heterocyclic cations. Oxidation of quinolinium and related cations by aldehyde oxidase in vitro; the isolation of two products formed simultaneously from a single substrate.
Aldehyde oxidase catalysed oxidation of various quinolinium and related cations has been studied in vitro. Oxidation products were identified by comparison of their spectral and chromatographic characteristics with those of authentic compounds. The N-heterocyclic cations and quinolones used …
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Olfactory Receptor Antagonism in the OR-I7 Aldehyde Receptor and the Mammalian Olfactory System
… requirements for activation of the OR-I7 aldehyde receptor. Octanal is an agonist of the OR-I7 receptor. 4-Ethylcyclohexylacetaldehyde (<strong>1.1)</strong>, with a cyclohexyl ring that locks the C4-C5 bond of octanal in the gauche conformation, was previously found to have higher potency …
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Synthetic and mechanistic investigations of the aldehyde addition reactions of tartrate ester modified allylboronates
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1989.
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