chemical shifts hydrogen bonding

... mixtures is due to various types of hydrogen bonding interactions (141–143) Infrared absorption spectra have also been employed to estimate the extent of hydrogen bonding between solutes such as ... and hydrogen abstraction reactions with a variety of hydrogen donors in supercritical fluids (184–191) For example, when 2-propanol and 1,4-cyclohexadiene were used as hydrogen donors, the hydrogen ... because 4-nitrophenol can participate in hydrogen bonding In addition, for 4nitrophenol in the supercritical ethane–basic cosolvent mixtures, the spectral shifts correlate well with the Kamlet–Taft...

Ngày tải lên: 02/04/2014, 15:48

... fraction of the hydrogen used is much smaller than that used in autonomy (Figure 8b) The more hydrogen is spent, like the energy consumption, the emissions will rise abruptly If hydrogen is obtained ... bigger the fraction of the use of energy from hydrogen, lower is the powertrain efficiency and higher is the overall energy consumption Due to the use of hydrogen and for the same reason explained, ... is reached the fuel cell will not start and no hydrogen will be consumed (unless extra power is needed) As said before, the higher the fraction of hydrogen is used, against the fraction of a fully...

Ngày tải lên: 05/09/2013, 14:58

... well Assume we have the following template: What are the side effects of [CHEMICAL] ? Based on (1) the semantic type CHEMICAL, (2) the information structure of our EPR, and (3) the patient number ... selected (the names of the database tables are in Dutch) Since the semantic type CHEMICAL has many subtypes (e.g., ORGANIC CHEMICAL and PHARMACOLOGIC SUBSTANCE), more EPR-queries are selected (viz one ... Clarithromycin cause high blood pressure? both resulted in the information-need template Does [CHEMICAL] cause [SIGN OR SYMPTOM]? To obtain a proper set of information-need templates, we removed...

Ngày tải lên: 16/02/2014, 20:20

Ngày tải lên: 17/02/2014, 15:20

Ngày tải lên: 27/02/2014, 05:20

... well Assume we have the following template: What are the side effects of [CHEMICAL] ? Based on (1) the semantic type CHEMICAL, (2) the information structure of our EPR, and (3) the patient number ... selected (the names of the database tables are in Dutch) Since the semantic type CHEMICAL has many subtypes (e.g., ORGANIC CHEMICAL and PHARMACOLOGIC SUBSTANCE), more EPR-queries are selected (viz one ... Clarithromycin cause high blood pressure? both resulted in the information-need template Does [CHEMICAL] cause [SIGN OR SYMPTOM]? To obtain a proper set of information-need templates, we removed...

Ngày tải lên: 05/03/2014, 23:20

... literature procedure [29] NO2 was obtained by air oxidation of NO All other chemicals were reagent grade and used as received Hydrogen peroxide solutions were freshly prepared by diluting a 30% (v/v) ... obtained from a plot of absorbance versus number of moles of hydrogen peroxide consumed in the HRP-catalyzed oxidation of 4, where hydrogen peroxide was the limiting reagent The following reagent ... when the enzymes were treated with nitrite and hydrogen peroxide in the absence of phenols Using LPO and saturating nitrite (150 mM), upon addition of hydrogen peroxide (0.85 mM) the Soret band,...

Ngày tải lên: 16/03/2014, 16:20

... the specific fuel and chemical applications: Fischer-Tropsch fuels, methanol and hydrogen Gasification Syngas H2, CO, CO2, CH4, N2, H2O, C2+ Synthesis Combustion Fuels or Chemicals Power or Heat ... fuels and chemical synthesis applications than for hydrogen and fuel gas applications High purity syngas (i.e low quantities of inerts such as N2) is extremely beneficial for fuels and chemicals ... the hydrogenation of carbon dioxide: CO + H2O 3H2 + CO2 2H2 + CO = = = H2 + CO2 CH3OH + H2O CH3OH Water-gas-shift Hydrogenation of carbon dioxide Methanol production also occurs via direct hydrogenation...

Ngày tải lên: 18/03/2014, 02:20

Ngày tải lên: 22/03/2014, 11:20

... noticed that the PM emission spectrum underwent changes after % 12 h at 37 C that we attributed to chemical modication of the label, possibly oxidation bis-ANS titration MBPapoptin and H6-MBP were ... attachment: residue Cys90 This is in agreement with our earlier nding that the OH of Tyr95 forms a stable hydrogen bond [2] However, experiments monitoring subunit exchange between apoptin multimers indicated...

Ngày tải lên: 23/03/2014, 21:20

... showed no promoting activity of hydrogen peroxide 5.4 Other relevant data Hydrogen peroxide is formed intracellularly as a result of certain enzymatic reactions Hydrogen peroxide, either from ... humans for the carcinogenicity of hydrogen peroxide There is limited evidence in experimental animals for the carcinogenicity of hydrogen peroxide Overall evaluation Hydrogen peroxide is not classifiable ... carcinogenicity data No adequate data on the carcinogenicity of hydrogen peroxide were available to the Working Group 5.3 Animal carcinogenicity data Hydrogen peroxide was tested in mice by oral administration,...

Ngày tải lên: 28/03/2014, 19:20

... risk of chemicals to humans and to produce monographs on individual chemicals The Monographs programme has since been expanded to include consideration of exposures to complex mixtures of chemicals ... the beginning of each monograph Most monographs on individual chemicals, groups of chemicals or complex mixtures include sections on chemical and physical data, on analysis, on production and use ... of infection and clinical disease other than cancer For chemical exposures, the Chemical Abstracts Services Registry Number, the latest Chemical Abstracts Primary Name and the IUPAC Systematic...

Ngày tải lên: 28/03/2014, 19:20

... in chemical potential between a molecule in solution and that in the bulk of the crystal phase: µ = µs − µc (1.1) where µs is the chemical potential of a molecule in solution and µc is the chemical ... (KFUPM) Chemical Engineering Department Research Institute Dhahran Saudi Arabia Mohammad Ashraf Ali King Fahd University of Petroleum & Minerals (KFUPM) Center of Excellence in Refining & Petrochemicals ... and Technology Department of Chemical and Biomolecular Engineering Clear Water Bay Kowloon Hong Kong PR China Michael Hunger University of Stuttgart Institute of Chemical Technology 70550 Stuttgart...

Ngày tải lên: 02/04/2014, 16:47

... organic transformations such as Knoevenagel condensation, aldol condensation, oxidation, epoxidation, hydrogenation, Suzuki cross-coupling, transesterification reaction, Friedel-Crafts alkylation, epoxide ... containing activated methylene groups has been widely employed in the synthesis of several fine chemicals as well as heterocyclic compounds of biological significance This reaction is conventionally ... pyrrole, pyrazoles, and their derivatives as important intermediates for pharmaceutical and fine chemical industry, as well as for the development of organic functional materials Traditionally,...

Ngày tải lên: 10/05/2014, 21:59

Ngày tải lên: 11/06/2014, 12:43

... flexibility and thus restricted post-processing of solid solar cells Here we report the electrochemical anodization of a thin Ti wire into a cylindrical core-shell-like TNT array that can directly ... (c) FESEM image of a free-standing cylindrical TiO2 tubule with its Ti core completely removed by chemical etching Top (d) and bottom (e) view of the TNT array by FESEM (f) TEM image of annealed ... the anodization time TNTs existed in the outer layer of the Ti wire after anodization, subsequent chemical etching, and ultrasonication treatment The outer (Figure 2a) and inner (Figure 2b) sides...

Ngày tải lên: 21/06/2014, 06:20

... institutes namely, Data Storage Institute (DSI), Institute for Infocomm Research (I²R), Institute of Chemical and Engineering Sciences (ICES), Institute of High Performance Computing (IHPC), Institute ... Figure The concept vehicle was designed by General Motors and was codenamed “HyWire” (“Hy” for hydrogen fuel cell and “Wire” for drive by wire) GM later renamed this vehicle “FX-3” and built...

Ngày tải lên: 25/06/2014, 00:55

... institutes namely, Data Storage Institute (DSI), Institute for Infocomm Research (I²R), Institute of Chemical and Engineering Sciences (ICES), Institute of High Performance Computing (IHPC), Institute ... Figure The concept vehicle was designed by General Motors and was codenamed “HyWire” (“Hy” for hydrogen fuel cell and “Wire” for drive by wire) GM later renamed this vehicle “FX-3” and built...

Ngày tải lên: 27/06/2014, 01:21

Ngày tải lên: 08/08/2014, 01:21

Ngày tải lên: 09/08/2014, 04:20