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Showing 1 to 20 of 44 for “"2-Propanol"”.
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In situ ¹³C NMR monitoring of the dehydration of 2-propanol over H-ZSM-5
… reaction is described. The dehydration of 2-propanol over H-ZSM-5 was observed using solution type techniques. Although this produces broad lines, several mechanistic details were elucidated. This study indicates that: 1) the dehydration does not proceed through a cyclopropyl carbenium ion …
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Flüchtige organische Verbindungen in der Ausatemluft von Kindern und Jugendlichen mit Asthma bronchiale
… ethane, propane, methanol, ethanol, acetone, 2-propanol, n-pentane, isoprene, dimethylesulfide, benzende, toluene, a-pinene, limonene and eucalytole in breath samples from 20 asthmatic patients and 20 healthy controls (age 9-23 years). Three end-exhaled and one ambient air sample were collected …
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Reaction Kinetics and Dissociation constants of Tertiary Alkanolamines for Carbon Capture
… {1-[Bis [3-(dimethylamino) propyl] amino]-2-propanol, N, n, n′, n′′, n′′-pentamethyldiethylenetriamine, N, n, n′, n′-tetrakis (2-hydroxyethyl) ethylenediamine, and N, n, n′, n′-tetrakis (2-hydroxypropyl) ethylenediamine}. The experimental results were reported in the form of secondorder …
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The separation of specific enantiomers of anticancer reagent cytarabine using HPLC.
… mobile phase ratios consisting of n-hexane: 2-propanol (50:50, v/v), (60:40, v/v) (70:30, v/v) at a flow rate 1.5ml/min and n-hexane: 2-propanol: diethylamine (50:50:0.2, v/v/v) and (60:40:0.2, v/v/v) at flow rate 1ml/min with excessive overlap. The application of the Chiralcel OJ-H column …
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Síntesis de nanopartículas puras de Ca(OH)2 y suspensiones superhidrofóbicas: Consolidación e hidrofugado de materiales arquitectónicos de interés patrimonial
… a lo largo del tiempo en mezclas de 2-propanol / agua, en las que se encontró que la ausencia de agua era crítica para evitar la aglomeración de Ca(OH)2. Una vez dispersas en 2-propanol, las nanopartículas se han utilizado para consolidar sustratos reales (piedra, adobe y estuco) …
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The enclathration of alcohols by cholic acid
… in the series CH₃(CH₂nOH (n= 0 to 3 and 2-propanol) were employed as guest molecules and enclathrated in the host lattice of Cholic acid during crystallization. Single crystal structure analyses were performed by X-ray diffraction. Two types of molecular packing were identified. Cholic acid …
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Chemical Identification and Organoleptic Evaluation of Iodine and Iodinated Disinfection By-Products Associated with Treated Spacecraft Drinking Water
… organic compounds: methanol, ethanol, 1-propanol, 2-propanol, 1-methoxy-2-propanol, acetone, and formaldehyde. NASA previously identified all of these compounds in wastewater sources under consideration for recycling into potable water. Experiments were performed at pH 5.5 and 8, iodine …
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Oxidation of Organic Compounds in Molten Salts
… without any violent reactions. Ethanol, 2-propanol, benzyl alcohol, and benzaldehyde were oxidized by Mn(VI) and Mn(VII); toluene was only oxidized by Mn(VII), and n-hexane, cyclohexane, and ethene were unchanged by both Mn(VI) and Mn(VII). Detailed experiments have been performed on the …
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Enantioselective enzymatic reduction of prochiral ketones in one-phase and two-phase systems
… is done substrate dependent by addition of 2-propanol which is oxidized by the ADH while the cofactor is reduced, and enzyme dependent. Here, a malate dehydrogenase(MDH) as second enzyme and L-malic acid as specific substrate are used for in situ cofactor reduction. The kinetic …
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Chemically and Photochemically Crosslinked Networks and Acid-Functionalized Mwcnt Composites
… solvents (chloroform, toluene, THF, DMF and 2-propanol) were prepared. DLS indicated average particle diameters of MWCNT-COOH in DMF and in 2-propanol were 139 nm and 162 nm respectively. FESEM of suspensions revealed aggregate free dispersion of MWCNT-COOH in DMF and 2-propanol. MWCNT-COOH …
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Reversed-Phase HPLC Determination of Cholesterol in Food Items.
… C-18 stationary phase using a 70:30 methanol: 2-propanol mobile phase with an UV detector set at 212 nm. The method showed linearity in the range 5.0 to 100.0 μg/mL and also good reproducibility with relative standard deviation of 4.22%, 2.71%, 4.8%, and 3.7% for the different samples analyzed. …
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Nuevos reductores y oxidantes medioambientalmente benignos en reacciones de transferencia de átomos de oxígeno catalizadas por complejos de dioxomolibdeno(VI)
… 2,3-dimetil-2,3-butanodiol, 1,2-etanodiol, 2-propanol, 3-mercaptopropilo soportado sobre sílica gel y 1,2,3-propanotriol (glicerol), en combinación con complejos de dioxomolibdeno(VI), son eficaces en la desoxigenación catalítica de sulfóxidos, permitiendo la obtención de tioéteres …
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Hydrocarbon Functionalization via a New Free Radical-Based Condensation Reaction
… (PhCH3, PhCH(CH3)2), other substrates (i.e., 2- propanol, phenyl cyclopropane) were also tested for this allylation reaction. The magnitude and scope of these reactions, and their synthetic utility is discussed.
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A Novel Technique for Fabricating Aligned Nanofibers by Using Solution Electrospinning
… acid) (PLGA 50/50) was dissolved in hexafluoro-2-propanol (TCI). Collected nanofibers were examined under Scanning Electron Microscope (SEM). Nanofibers were 0.7 µm in diameter and 1.5 cm in length. Besides creating aligned nanofibers by using a new designed apparatus, the other aim of this …
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Thermodynamic and kinetic phenomena in the enzymatic conversion of acetophenone to 1-(R)-phenylethanol in a continuous gas/solid reactor
… with the concomitant oxidation of 2-propanol to acetone catalyzed by deposited wild type LBADH were described. The operation of the reactor set-up was validated and the achievement of thermodynamic control was proven. At the validated system, the mass transfer along the packed bed was …
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Herstellung und Charakterisierung von Fasern aus rekombinanten Spinnenseidenproteinen und deren potentielle Applikationen
… konzentrierte Proteinlösungen aus Hexafluor-2-Propanol versponnen und die resultierenden Faserdurchmesser mikroskopisch untersucht. Auf Basis rheologischer Untersuchungen konnte der systematische Einfluss des Proteinmolekulargewichts und der Konzentration auf die Viskosität der Spinnlösungen …
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Thermochemical Study of Crystalline Solutes Dissolved in Ternary Hydrogen-Bonding Solvent Mixtures
… Dibutyl ether, or 1,4-Dioxane), an alcohol (1-Propanol, 2-Propanol, 1-Butanol, 2-Butanol, or 2-Methyl-1-propanol), and an alkane (Cyclohexane, Heptane, or 2,2,4-Trimethylpentane) cosolvents. The Combined NIBS (Nearly Ideal Binary Solvent)/Redlich-Kister equation was used to assess the …
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A Study of the Non-linear Variation in the Temperature of the Water Density Anomaly as a Function of Solute Concentration
… low concentration region for both ethanol and 2-propanol. Macroscopic and microscopic are investigated in an attempt to understand and explain this unexpected behaviour
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Substitution and photolytic rearrangements in three-member ring compounds
… exchange with refluxing methanol, ethanol, or 2-propanol to yield the corresponding 1,2,3-triphenylcyclopropenyl alkyl ether when a trace impurity of a 1,2,3-triphenylcyclopropenium halide is present to catalyse the reaction. This forms hydrogen halide with solvent. Upon standing for long periods …
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