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Showing 1 to 20 of 414 for “"Ketone"”.
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Crystallization Behavior, Tailored Microstructure, and Structure-Property Relationships of Poly(Ether Ketone Ketone) and Polyolefins
… for the semi-crystalline polymer poly(ether ketone ketone) (PEKK), 2) increase understanding of the influence of microstructure (random versus blocky) of functionalized semi-crystalline polymers on physical and chemical properties, and 3) understand the influence of additive manufacturing …
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Physical and mechanical behavior of amorphous poly(arylene ether)ketone and poly(arylene ether)ketone modified bismaleimides
Bisphenol-A based poly(arylene ether)ketones (PAEKs) are tough, amorphous processable thermoplastics possessing a glass transition temperature of approximately 160°C. In the form of a thermoset, these polymers have potential usages as structural engineering matrix resins or adhesives, as well as …
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The effect of cooling rate on toughness and crystallinity in poly(ether ketone ketone) (PEKK)/G30-500 composites
Six poly(ether ketone ketone)/carbon composite panels were manufactured from powder coated towpreg. All six panels were initially processed using a hot press equipped with controlled cooling. Four of the panels were used to investigate the effect of cooling rate on crystallinity. A fifth panel was …
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Solution photochemistry of derivatives of Michler's Ketone
… of 4,4-bisdimethylaniinobenzophenone, Michler's ketone, in which the terminal dimethylamino-groups have been replaced by diethylamino, pyrrolidino, piperidino, N-methylpiperazino and morpholino moieties has been prepared utilising the reaction between an aryl-lithium and a substituted …
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Aqueous poly(arylene ether ether ketone) suspensions
… of submicron diameter poly(arylene ether ether ketone) suspensions in water, and analysis of suspension stability as a function of the suspension variables. This thesis focuses on developing the procedures, and defining the parameters, for preparing stable aqueous suspensions of PEEK particles …
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A study of the damage accumulation process in poly(aryl ether ketone ketone) and its AS4 carbon fiber reinforced composites
… on the damage accumulation process in poly(ether ketone ketone) and its AS4 carbon fiber reinforced composites. The damage accumulation process was studied as a function of applied heat treatment. This study is the result of a project funded by duPont and was done in part to explain the dramatic …
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Kinetics of ketone hydrogenation over supported Ru catalysts
… proceeds first through the reduction of the LA ketone group to its corresponding alcohol, 4-hydroxypentanoic acid (HPA), which subsequently produces GVL via intramolecular esterification in solution. The governing kinetics of LA hydrogenation were found to be insensitive to the identity of the …
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Ketone Supplementation, Cardiometabolic Health, and Cognition in Humans
… health. Supplementation with exogenous ketone esters (KE) has been shown to increase plasma β-hydroxybutyrate (BHB) and mimic the metabolic effects of LCHF ketogenic diets. Evidence suggests elevated concentrations of plasma BHB may lower blood pressure, improve vascular function, …
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Solvent-Induced Crystallization of Poly(ether ether ketone)
… crystallization of poly(ether ether ketone) (PEEK). Unoriented amorphous PEEK films were immersed in aprotic organic liquids at ambient temperature and bulk properties or characteristics were monitored as a function of immersion time. The sorption behavior, Tg and Tm° suppression, …
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Fluoromethyl ketone prodrugs: Potential new insecticides towards Anopheles gambiae
… studies demonstrate that tri- and difluoromethyl ketones can potentially inhibit An. gambiae AChE (AgAChE). These compounds inhibit the enzyme by making a covalent adduct with the catalytic serine of AChE. Trifluoromethyl ketones however are poor inhibitors of the G119S resistant mutant of AgAChE. …
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Effect of intermediate solvents on poly(ether ether ketone)
The interaction between poly(ether ether ketone) (PEEK) and three solvents (i.e., methylene chloride, tetrahydrofuran, and acetone) was studied by means of several complementary techniques. A series of eleven 0.3 mm thick PEEK films was produced. Each film had a certain crystallinity index and …
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Conjugate Di-Addition of Grignard Reagents to Duryl Phenyl Ketone
Made available in DSpace on 2014-12-05T19:37:46Z (GMT). No. of bitstreams: 1 6104339.pdf: 2308175 bytes, checksum: 042d25d41a6a8dfbb77b698573a45d99 (MD5) Previous issue date: 1961
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Cardiomyocyte-Specific Deficiency of Ketone Body Metabolism Promotes Accelerated Pathological Remodeling
… have been explored extensively, the influence of ketone bodies, which are highly competitive substrates for myocardial oxidative metabolism, remains ill-defined, in part due to their low circulating concentrations in fed states. Here I illuminate the roles of myocardial ketone body metabolism …
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An Investigation of the Friedel-Crafts Condensation With Homoterpenyl Methyl Ketone.
… One such derivative, homoterpenyl methyl ketone, is a readily available keto-y-lactone.
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Morphology-Property Relationships in Semicrystalline Aerogels of Poly(ether ether ketone)
… thermoreversible gelation of poly(ether ether ketone) (PEEK) in dichloroacetic acid (DCA) and 4-chlorophenol (4CP) were constructed over broad temperature and concentration ranges, revealing that PEEK is capable of dissolving and forming gels in DCA and 4CP up to a weight fraction of 25 wt.%. …
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Biomimetic Design of Poly(ether ether ketone) Composites for Bone Replacement
… material for bone replacement, poly(ether ether ketone) or PEEK. PEEK is a polymer that can be introduced to the body without rejection, and has been used as a material for spinal fusions and partial skull replacements. Additionally, not being a metal, PEEK avoids the risk of the introduction of …
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