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Showing 1 to 20 of 240 for “"Acetonitrile"”.
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Theoretical Prediction of Nuclear Magnetic Shielding Constants of Acetonitrile
… of ?H, ?C, and ??N were calculated for acetonitrile in the gas and liquid phases. Dierent basis sets as well as dierent ab initio and DFT methods were tested to select a time-ecient level of theory with reasonable accuracy. The eect of nuclear motion on the shielding constants was also …
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Observations on the Rare Earths: Electrochemical Studies Involving Anhydrous Pyridine and Acetonitrile Solutions
Made available in DSpace on 2014-12-05T19:37:00Z (GMT). No. of bitstreams: 1 5900513.pdf: 3455283 bytes, checksum: 54bb5ac082b2dec095e0d393487c30b0 (MD5) Previous issue date: 1958
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The Uptake and Metabolism of Potassium-Cyanide-(carbon-14-Labeled) and Acetonitrile-1-(carbon-14-Labeled) in Plant Tissues
Made available in DSpace on 2015-05-12T17:04:09Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0019876.PDF: 5234004 bytes, checksum: f6e8593d4331da04fd35560b8f1db7da (MD5) Previous issue date: 1956
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An empirical potential for hydrogen bond energies determination of the orientation of anthracene molecules in the unit cell by means of a refractivity method: some ab initio calculations involving acetonitrile exchange reaction
Topic I An empirical potential for calculating hydrogen bonding energies is developed for systems of the type A-H--B, where A and/or B is oxygen or nitrogen. Point charge and van der Waals interaction are included in the potential. The parameters of the potential were optimized by means of a …
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A Nanosecond Laser Spectrophotometric and Product Investigation of the Chemistry of Fluorenylidene
… cyclohexane, cyclopropane, spiropentane, acetonitrile, and Freon 113 spectroscopically, and chemically by isolation and characterization of products. Proposal of an equilibrium between singlet and triplet fluorenylidene has been made. Evidence has also been presented for a reassignment of …
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Diffusion related processes in nanoconfined liquids and in proteins under force
… investigates some diffusion related problems, in acetonitrile confined in silica nanopores, and in modeling single molecule forced rupture experiments of biomacromolecules. Based on a method used to calculate the position-dependent diffusion coefficients in inhomogeneous liquids, we apply …
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Effect of pomegranate extracts on apoptosis and cell cycle in haematological malignancies.
… phase extraction demonstrated that only the acetonitrile fractions decreased adenosine triphosphate (ATP) levels in all Leukaemia cell lines. Acetonitrile fractions also significantly activated caspase-3 and induced nuclear morphology characteristic of apoptosis. S phase arrest was induced by …
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Analysis of T-2 Toxin in Feed and Animal Specimens
… by silica gel column chromatography using acetonitrile as an elutant. The acetonitrile was removed by evaporation and heptafluorobutyryl imidazole (HFBI) was added to form esters of the toxin. The esters were separated on a 2% OV-1, 6ft. glass column and quantitated with a Nickel-63 …
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Characterization of cellulose esters via GPC/FT-IR
… of cellulose nitrates observed in THF and acetonitrile solutions. Independent absorptions for the primary nitrate at C₆ and secondary nitrate at C₃ were observed at 1651 cm⁻¹ and 1639 cm⁻¹ respectively. In addition, a third absorption at 1667 cm⁻¹ was observed to be dependent upon the …
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Time-Resolved Studies of Aryl Carbenes
… found to be 2.4 (+OR-) 0.7 x 10('9) s('-1) in acetonitrile, 2.0 (+OR-) 0.5 x 10('9) s('-1) in hexafluorobenzene, and > 7 (+OR-) 1 x 10('9) s('-1) in cyclohexane. An additional transient absorbing at 470 nm and 500 nm which is attributed to the 9-fluorenyl radical appears with a rate constant of …
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Formation of (halo)acetamides and (halo)acetonitriles from the reaction of monochloramine and (halo)acetaldehydes in water
… DBPs formed by combined chlorine, such as haloacetonitriles and haloacetamides, might be more toxic than regulated DBPs. Monochloramine has been shown to react with aldehydes, common DBPs formed from ozone and free chlorine disinfection, to form carbinolamines that slowly dehydrate to imines …
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Explore the Formation of Triplet Nitrene - A Potential Intermediate for Building Organic Magnets
… photolysis of 2-Phenyl-3-Methyl-2H-Azirine in acetonitrile yields two dimers exo-2,6-dimethyl-4,5-diphenyl-1,3-diazabicyclo[3.1.0]hex-3-ene and endo-2,6-dimethyl-4,5-diphenyl-l,3-diazabicyclo-[3.1.0]hex-3-ene. Laser flash photolysis of 3-Phenyl-2-Methyl-2H-Azirine in acetonitrile results in a …
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Diffusion coefficient measurements and other investigations using the methods of twin-electrode thin-layer electrochemistry
… in 0.25M tetraethylallnonium perchlorate(TEAP-acetonitrile medium; ferroceneferricinim in three different solvents (acidified acetonitrile, N,N-dimethylformamide, propylene carbonate) with 0.1M TEAP as supporting electrolyte. Diffusion coefficients for the electroactive species were obtained, …
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Implementing Solvothermally Synthesized Carbon Nanodots into Dye-Sensitized Solar Cells to Enhance External Quantum Efficiency in the Ultraviolet
… for the implementation of CNDs in DSSCs, acetonitrile is the most conventient solvent instead of water (more convenient than other low density solvents such as chloroform), otherwise sorption of the dye-sensitizer molecules into the metal oxide layer is compromised, which presents a …
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Establishing the Conditions for Stable Extrusion of Melt Spun Polyacrylonitrile with Water Based Plasticizers
… based plasticizers. More specifically, PAN/water/acetonitrile (70/15/15) mixture is considered as reference sample in this study because it was proposed in a BASF patent in which it was claimed it could be stably melt spun. We are looking for a more benign plasticizer so that the use of …
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Extraction of Capsaicin Using the Polyol Induced Extraction (PIE) Method
… be used to separate caffeine and capsaicin. When acetonitrile and water are used as a 1:1 solvent mixture, two immiscible phases are created upon addition of the polyol, glycerol. Initially, for purposes of training on the PIE method, the studies primarly began with the extraction of pure …
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Mechanisms of discharge product evolution and solvent stability in lithium-oxygen batteries
… Discharges were performed in dimethoxyethane and acetonitrile with and without added water. Water caused an unwanted side reaction to form LiOH in acetonitrile but not in dimethoxyethane, due to a higher favorability of deprotonation in acetonitrile. Interactions between capacity enhancing …
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Optimal Analysis of Sulfonamides From Biological Matrices Using Supercritical Fluids
… liver and egg yolk. Methanol, ethanol, acetone, acetonitrile were compared to determine optimum conditions. A SFE method employing 20% acetonitrile modified CO2 yielded quantitative recovery of sulfonamides from chicken liver, but 20% acetone modified CO2 was required to obtain quantitative …
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The Synthesis and Characterization of Some Ir(III) Dicationic Complexes
… and is soluble in polar solvents such as water, acetonitrile, and acetone. [IrH(COD)(PMe3)3][Cl]2o2HCl undergoes reaction in water to form fac-IrCl3(PMe3)3. Also, other [IrH(COD)(PMe3)3][X]2 salts were prepared with X being PF6, OTF, or BF4. It was determined that each salt retained a certain …
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