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Showing 1 to 20 of 27 for “"tartaric acid"”.
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Asymmetric Positron Annihilation in Chiral Tartrate and Tartaric Acid Crystals
… study the interactions of positrons with chiral tartaric acids and tartrates. Differences in lifetimes of and its intensity I2 were compared between large crystals grown from the D- and L- enantiomers of sodium ammonium tartrate and tartaric acid. A tentative but statistical difference in and I2 …
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Product identification study in the uranium(IV)-thallium(III)-tartaric acid system
Thesis (M.S.)--Michigan State University. Dept. of Chemistry, 1966
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Studies of tartaric acid modified nickel supported catalysts for enantioselective hydrogenation reactions
… thesis investigates the catalytic properties of tartaric acid‐nickel supported catalysts, obtained from hydrotalcite‐like compound precursors, in the enantioselective hydrogenation of methyl acetoacetate to methyl 3‐hydroxybutyrate. Variables of reaction during modification such as pH and …
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An Electrolytic Method for Tartrate Stabilization in Chardonnay Wine
… analyzed for stability and quality purposes. Tartaric acid, potassium, calcium, and conductivity differences were the most important factors for tartrate stability. Temperature, titratable acidity, pH, color (hue and intensity), and chemical oxygen demand (COD) were indicators of sensory …
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Identification of acyl transferases responsible for the diverse hydroxycinnamoyl chemical space in bidens pilosa
… contingency of structurally diverse chlorogenic acids. B. pilosa is known to produce different structural hierarchies of chlorogenic acids (i.e., mono-, di-, tri- acyls). The biosynthetic pathway to produce the diverse array of chlorogenic acids in B. pilosa is not yet elucidated. It is known …
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A modified synthesis, C-functionalization, resolution and racemization kinetics of cross -bridged tetraazamacrocycles
… of its diastereomeric salt of L-(+)-tartaric acid is described. Additionally, the kinetics of racemization of enantiopure cross-bridged cyclam is presented.</p>
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Viticultural techniques of canopy management to mitigate the effects of global warming
… was increased. SST helped to improve organic acid composition by increasing the tartaric acid and reducing the malic acid. The experiment on MP demonstrated clearer results in the size of the berry: the significantly smaller berries contributed to the darker color of MP juice, but the ability …
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Separation of enantiomers of Baclofen
(3-(Aminomethyl)-4-chlorobenzenepropanoic acid (Baclofen), 3-(p-chlorophenyl)pyrrolidone (Baclofen lactam) and 3-(p-Chlorophenyl)glutaramide (baclofen's synthetic precursor) were individually used as substrates in co-crystallisation experiments with several resolving agents. Experiments were …
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Optical studies of chiral 1-substituted-2-phenylcyclohexanes
… (IV), trans-2-phenylcyclohexanecarboxylic acid (V), trans-2-phenylcyclohexanecarbonyl chloride (VI), and trans-1-hydroxymethyl-2-phenylcyclohexane (VII). The amides from (±)-III and (±)-VI and from (+)-III and (+)-VI were also prepared.</p> <p>I and II were isolated from a commercial …
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Compact spectroscopic terahertz imaging solutions using GaAs/AlGaAs and InGaAs semiconductor nanostructures /
… THz images of samples containing sucrose and tartaric acid and to determine their principal component distribution in the frequency range of 0.5¬–2.5 THz. Frequency range was extended up to 4.2 THz by applying nanometric field effect transistors. THz detectors based on Titanium microbolometers …
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Supramolecular derivatives of selected bioactive compounds : a physicochemical study
… co-crystals, one with saccharin and one with rac-tartaric acid, were isolated by the co-precipitation method. Physicochemical characterisation techniques used to assess the thermal behaviour of the products included hot stage microscopy, differential scanning calorimetry and thermogravimetric …
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Microbial Safety, Shelf Life Stability, Quality Preservation, and Consumer Acceptance of Vacuum-infused, Irradiated Chicken Breast Meat Treated with Natural Plant Extracts and Organic Acids
… the potential of vacuum-infused organic acids and select plant extracts for use in conjunction with electron beam irradiation at low levels as antimicrobials in a multiple hurdle approach to poultry decontamination and as antioxidants to mitigate the irradiation dose-dependent quality …
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Field sampling and microcolumn preconcentration techniques in inductively coupled plasma spectrometry.
… is investigated. The use of the complexing agent tartaric acid is shown to be effective in improving analyte retention. The procedure is successfully applied to determination of these analytes in a certified river water reference material (SLRS-1). Due to low retention and elution efficiencies, …
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Inorganic-Organic Hybrid Networks Constructed from Different Metal Ions and Ligands
… from various organic ligands, such as tartaric acid, picolinic acid and 1, 2, 4-triazole. In addition to the hybrid networks, six hydrogen bonded networks were prepared. Graph-Analysis is applied to study these hydrogen bonded network structures. The Ï â ¦.Ï interaction is also …
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Studies on the deactivation and reactivation of spent hydroprocessing catalyst
… area and porosity was significant. Both catalyst acidity and feedstock quality had a remarkable influence on the amount and the nature of the initial coke. The hydroenitrogenation function (HDN) of the catalyst was found to be deactivated more rapidly by the initial coke than the …
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Synthetic studies towards total synthesis of bielschowskysin
… tricyclic core of bielschowskysin. From malic acid, the allene appended butenolide was prepared in 13 steps and [2+2] cycloaddition was carried out under the UV lamps to form the tricyclic core of bielschowskysin. After making the tricyclic core, retrosynthetic analysis of key intermediate …
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Effect of canopy manipulation on rot incidence and rot metabolites of White Riesling (Vitis vinifera L.) grapes
… °Brix, glucose to fructose ratio, titratable acidity, tartaric acid, glycerol and gluconic acid. Grape sour rot reduced the concentrations of geraniol, nerol and linalool, while increasing oxidation products, aromatic alcohols and long chained alcohols. Grape juice sensory analysis appeared to …
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Thiocyanate complexes of osmium
… treating an alloy of the platinum metals with acid.</p><p>Osmium occurs in nature alloyed with the other metals of the platinum group. One type of alloy includes all six of the of the platinum metals, osmium, iridium, platinum, ruthernium, rhodium and palladium. Osmium also occurs in an alloy …
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Estrategias de optimización de la calidad de vinos blancos en la D.O.Ca. Rioja
… In general, this practice decreased the total acidity and tartaric acid content and increased the concentration of malic acid, amino acids, glutathione, varietal aromas and phenolic compounds, in parallel to the cryomaceration time. In Tempranillo Blanco variety the optimum cryomaceration time …
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Investigating co-crystallisation of primary amides and carboxylic acids. Comparative analysis of Benzamide, Isonicotinamide and Nicotinamide co-crystal growth with carboxylic acid.
… to the primary amide, usually carboxylic acids. The progress with regards to the screening process for the determination of co-crystals is evident in the literature, In particular, high throughput solution growth methods and solvent drop grinding. The comparison of Isonicotinamide and …
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