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Showing 1 to 20 of 79 for “"Dimethyl sulfoxide"”.
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Diffusion of dimethyl sulfoxide in aqueous mixtures and polyelectrolyte gels
<p>Diffusion coefficients, D<sub>BULK</sub>, of dimethyl sulfoxide (DMSO) were measured in free (“bulk”) aqueous mixtures by the capillary method using sulfur-35 labeled DMSO. The value of D<sub>BULK</sub> was found to pass through a minimum at approximately 33 mole percent DMSO as DMSO …
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NMR study of peptide derivatives in cryoprotective media and dimethyl sulfoxide
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Antibiotic Effects of Dimethyl Sulfoxide and Synthetic Polyphenols on E. Coli Cells
… of this study is to determine the effect of dimethyl sulfoxide on the cellular uptake of synthetic polyphenols. Three synthetic polyphenols (Phenol Red, Congo Red, and Bromophenol Blue) were tested for their antibiotic properties and compared to the antibiotic activity of curcumin. Our …
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Some effects of dimethyl sulfoxide on absorption, translocation, and membrane permeability in plants
The influence of DMSO (dimethyl sulfoxide) on foliar absorption and translocation of herbicides and plant membrane permeability was investigated. Primary leaves of bean (<i>Phaseolus vulgaris</i> L., var. Black Valentine) were treated with ¹⁴C-labeled DMSO, 3,6-dicholoro-<u>o</u>-anisic acid …
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The Effects of Dimethyl Sulfoxide on the Mutagenic Action of Ethyl Methanesulfonate in Drosophila Melanogaster
… damage and injury due to alkylating agents. Dimethyl sulfoxide (DMSO) provides an effective protection against the mutagenic effects of radiation in many organisms including Drosophila. The major objective of this study was to determine the effects that topical application of DMSO would have …
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Kinetics of alkali metal ion self-exchange on polystyrene sulfonate resin in dimethyl sulfoxide-water media
… solution have been measured over a range of dimethyl sulfoxide (DMSO)-water mixtures from 0 to 70 mole % DMSO. Interpretation of results is simplified by the choice of this system which exhibits relatively constant resin swelling, fairly high dielectric constant and virtually no solvent …
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High Pressure Nmr Studies of the Dynamics of Fluids and Fluid Mixtures (Supercritical, Dimethyl-Sulfoxide, Diffusion)
This thesis deals with several related but specific projects which examine the transport and relaxation properties of a number of fluids and fluid mixtures as a function of temperature and pressure. The common denominator of these projects is the use of pressure as an essential variable in studies …
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Mechanisms of discharge product evolution and solvent stability in lithium-oxygen batteries
… Decomposition reactions in the solvent dimethyl sulfoxide were studied due to conflicting reports about its stability. Discharged electrodes in dimethyl sulfoxide were aged for varying amounts of time then characterized. Li₂O₂ reacted with dimethyl sulfoxide to form LiOH and dimethyl …
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Leveraging the Properties of Aprotic Solvents Towards Efficient Electrocatalytic Carbon Dioxide Reduction
… designs. Chapter 1 details the development of a dimethyl sulfoxide / acetic acid electrolyte which can engender selective carbon dioxide reduction with minimal electrolyte carbonation on gold cathodes. We demonstrate that the key to engendering these balance of properties entails operating an …
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Sablefish (Anoplopoma fimbria) sperm: The physiology of activation and the development of a cryopreservation protocol
… The effects of several cryoprotectants including dimethyl sulfoxide, propylene glycol and glycerol at two concentrations (5% and 10%) and three freezing rates (-2.5, -5 and -7.5 °C/min) were tested on the cryopreservation of sperm using a Crysalys cryogenic programmable freezing system. There were …
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A Conductometric Study of the Reaction Velocities of 2, 4-Dinitrochloro, Bromo, and Iodobenzene with Piperidine in Dimethylsulfoxide at Various Concentrations and Temperatures
… is random, the above system was studied in dimethyl sulfoxide to determine the applicability of the conductometric method, rate constants, activation energies and entropies, and halogen reactivity series. Procedure: After checking the chloro analog in ethanol, piperidine and …
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Solution Properties of Some Iron and Copper Macrocycles.
… determined from visible spectral data, and in dimethyl sulfoxide (DMSO) were obtained from atomic absorption analysis. Kinetic data for the dissociation of FePc in pyridine is reported. Magnetic susceptibilities of FePc in pyridine, 2-methylpyridine, 3-methylpyridine, and 4-methylpyridine …
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ENHANCING CARDIAC TRANSDIFFERENTIATION OF FIBROBLASTS USING SINGLE-CELL TRANSCRIPTOMICS ANALYSIS AND HIGH-THROUGHPUT CHEMICAL LIBRARY SCREENING APPOACHES
… screening, we serendipitously discovered that dimethyl sulfoxide (DMSO) itself improves the efficiency of cardiac transdifferentiation. DMSO treatment increased the percentage of cTnT+ and αMHC-mCherry+ cells by about 4-fold and 6-fold, respectively, and induced higher expression of cardiac …
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The characterization of starches and maltodextrins by proton nuclear magnetic resonance spectroscopy
… hydroxide-d/deuterium oxide (KOD) (Method I) and dimethyl sulfoxide-d$\sb6$ (DMSO-d$\sb6$) (Method II) as the solvents. A 90 degree pulse width for the (1,4) and (1,6) protons and minimal recycle time were used to eliminate interference from the monodeuterated water (HOD) signal in Method I. The …
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An isoperibol calorimeter for the investigation of biochemical kinetics and isothermal titration calorimetry
… calorimetric device. Dilution reactions with dimethyl sulfoxide and water were conducted to measure the excess enthalpy of binding. The inaccuracy of these measurements necessitated the more careful design of an isoperibol calorimeter. This calorimeter was modeled was an arrangement of coupled …
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Influence of lipid antioxidants on soybean seed storage life
… events. Seed were treated with antioxidants in dimethyl sulfoxide (DMSO) to investigate possible protective effects of antioxidants during storage and thus also provide evidence for the lipid peroxidation model of seed aging. The toxicity of DMSO to soybean seed was found to be minimal at …
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Genetic relatedness of the family Rhodospirillaceae: Genome plasticity, chromosome heterogeneity, and chalcogenic oxyanion reductase activity in Rhodobacter sphaeroides
… mutants, the periplasmic-localized dimethyl sulfoxide/trimethylamine-N-oxide reductase (which has been isolated and purified to homogeneity) is not involved in the reduction of these oxyanions. Examination of other Rba. sphaeroides mutants, however, has determined the obligate …
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Formation and mechanics of self-assembled molecular gels
… when water is added to Fmoc-FF dissolved in dimethyl sulfoxide (DMSO). At high water concentrations, gels are formed at concentrations as low as 0.001%. We establish the gel line defining the Fmoc-FF and water concentrations where gels are formed. At fixed water concentration, over a narrow …
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