protic and nonprotic ionic liquids in polar diels alder reactions using properly substituted het
IONIC LIQUIDS IN BIOTRANSFORMATIONS AND ORGANOCATALYSIS pptx
Ngày tải lên :
22/03/2014, 09:20
... Aprotic Ionic Liquids 2.2.3 Water Present in the Ionic Liquids 2.2.4 Interactions of Water and Ionic Liquids with Proteins 2.2.4.1 Effect of Water and Water Activity 2.2.4.2 Effect of Ionic Liquids ... tris(hydroxymethyl)aminoethane INTRODUCTION Ionic liquids (ILs) are organic salts remaining as liquids under ambient temperatures Since the rst reports on performing biotransformations in ILs,1,2 interests in using ... Effect of Ionic Liquids on Protein Structure and Dynamics 2.4.3 Effect of Ionic Liquids on Protein Refolding and Renaturation 2.4.4 Effect of Ionic Liquids on Protein Crystallization and Fibrilization...
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APPLICATIONS OF IONIC LIQUIDS IN SCIENCE AND TECHNOLOGY ppt
Ngày tải lên :
29/06/2014, 09:20
... of 5-HMF using inulin in ionic liquids under mild conditions Combining [BMIM][Cl] and a strong acidic cation exchange resin gave a 5-HMF yield of 55% in 20 Subsequently, a two-step in one pot ... Holdsworth, Bowyer, and McCluskey), and even as unusual components of polymers (Vidinha, Lourenco, Nunes, Duarte, and Barreiros) Similarly, ionic liquids are finding increasing use in the popular ... produced using various caffeoylquinic acids (15 àmol) and methanol (2200 àmol) Using 3-caffeoylquinic acid, 4-caffeoylquinic acid, 5-caffeoylquinic acid, 3,5-dicaffeoylquinic acid, and 4,5dicaffeoylquinic...
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ionic liquids in synthesis
Ngày tải lên :
09/05/2014, 17:05
... Reactions and Acid-Catalyzed Reactions in Ionic Liquids 174 Stoichiometric Organic Reactions 175 Molten salts as reagents 175 Reactions in chloroaluminate(III) and related ionic liquids 177 Reactions ... catalyst in ionic liquids 220 The Role of the Ionic Liquid 220 The ionic liquid as “innocent” solvent 221 Ionic liquid as solvent and co-catalyst 221 Ionic liquid as solvent and ligand/ligand precursor ... Reactions and their Special Needs 336 Examples of Biocatalytic Reactions in Ionic Liquids 339 Whole-cell Systems and Enzymes other than Lipases in Ionic Liquids 339 Lipases in Ionic Liquids 342...
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Chiral bicyclic guanidine catalyzed diels alder reactions of anthrones
Ngày tải lên :
12/09/2015, 10:17
... Mechanistic and Kinetic Studies of Guanidine Catalyzed Enantioselective Diels- Alder Reactions 137 5.7 Anthrone-Derived NHPI Analogues as Catalysts in Reactions Using Oxygen ... Chapter Chiral Guanidine and Guanidinium Derivatives as Asymmetric Catalysts Chapter Arginine is found in the active site of many enzymes and its guanidine side chain typically exists in the protonated ... alcohols.9c 47a was obtained in 59% ee and 36% yield with guanidine 45 (Scheme 1.12) When guanidine 46 was employed, 47a and 47b were obtained in 58% and 70% ee, respectively In both cases, one equivalent...
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A theoretical study of hetero diels alder reactions
Ngày tải lên :
26/09/2015, 10:44
... spin, , thus some error may be introduced into the calculation This error is called spin contamination 2.6.2 How does spin contamination affect results? Spin contamination results in having ... low-spin contamination effect in DFT theory Yamaguchi and his coworker41 examined a procedure for improving the spin and energy properties of an UMPn wavefunction, which involves expanding the ... the stability of the pure singlet states in this region Thus, the true singlet energy lies between the spincontaminated and spin-projected singlet energies Since the spin-projection procedure overcorrects...
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Báo cáo vật lý: "Protonation and Complexation Approaches for Production of Protic Eutectic Ionic Liquids" ppsx
Ngày tải lên :
07/08/2014, 14:20
... calorimetric data were obtained by heating and cooling the hydrochloride salts sample as shown in Table Each melting point of the DSC traces represents a crystalline melting point for the hydrochloride ... compounds—aminobenzaldehyde, amino acid, hydroxymethyl amine, the amino acid thiol side chain and cyclic amide—were used in this study FDBC, CMAC, DHPC, CMEC, and MOPC were synthesised using HCl ... 100°C to eliminate their thermal history The experiments were carried out in a temperature range of –60°C to 450ºC with a cooling and heating rate of 10°C/min to obtain the melting point, Tm, which...
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Synthesis of ionic liquids and their applications in capillary electrophoresis
Ngày tải lên :
17/09/2015, 17:19
... with running buffer and the sample is introduced by dipping one end into the sample and applying an electric field (electrokinetic injection) or by applying gas pressure (hydrodynamic injection) ... pressure and longer columns than in HPLC can be used Nowadays, CEC is applied in separating a wide range of materials including phenols, PAHs, amines, carbonyls, dyes, and even inorganic and small ... modifying the silica surface Injection and related broadening CE is a microanalytical technique and the injection of sample in CE can have dramatic effects on the performance Principally, introducing...
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Báo cáo hóa học: " Use of Ionic Liquid in Fabrication, Characterization, and Processing of Anodic Porous Alumina" pot
Ngày tải lên :
22/06/2014, 00:20
... dotted line: same conditions as in Fig 1a (i.e., with cooling and without stirring) but the 10-fold diluted EL Dashed line: RT, no stirring Continuous line: RT, stirring Thick line: cooling, no ... was maintained in all the anodizations and for all the process time period, a linear relationship between J and h was expected [5, 22] However, after the initial increase in h with increasing J ... by hand brushing ([10 s) with acetone-wet lens paper, sonicating in warm (60 °C) acetone, rinsing in de-ionized (DI) water, sonicating another in warm (60 °C) ethanol, and thoroughly washing...
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Báo cáo hóa học: " Synthesis and Characterization of Monodispersed Copper Colloids in Polar Solvents" pdf
Ngày tải lên :
22/06/2014, 01:20
... experimental parameters are listed in The In uences of Solvents on Reaction Process Sample and sample were synthesized using water as solvent, and the reaction time was and h, respectively Because ascorbic ... copper Comparing to the reaction rate using water as solvent, the rate using E.G was higher, and the color change of the Table Comparison of results from the two reaction systems and different ... reaction process in water medium (a) and E.G medium (b) reaction process is shown in Fig 1b In 15 min, the initial precursor solution with light blue color changed to light brown, red, and black The...
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IONIC LIQUIDS – CLASSES AND PROPERTIES pot
Ngày tải lên :
29/06/2014, 09:20
... Chapter 13 Ionic Liquids in Polar Diels- Alder Reactions Using Carbocycles and Heterocycles as Dienophiles 311 Mancini Pedro M.E., Kneeteman María, Della Rosa Claudia, Bravo Virginia and Adam Claudia ... Seaver and C S Esslinger (2007) "Design, synthesis, and biological activity of novel triazole amino acids used to probe binding interactions between ligand and neutral amino acid transport protein ... synthesis and applications of thiazolium and benzothiazolium based ionic liquids Thiazolium salts / ionic liquids The thiazoles are known in chemistry mainly due to their presence in thiamine (Vitamin...
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IONIC LIQUIDS: APPLICATIONS AND PERSPECTIVES ppt
Ngày tải lên :
29/06/2014, 13:20
... high-temperature and closed-vessel applications using microwaves In contrast, ionic liquids have high boiling-points, low vapor pressures, and high thermal stabilities In addition, typical ionic liquids ... Hydrogenation in Ionic Liquids 331 Mukund Ghavre, Saibh Morrissey and Nicholas Gathergood Chapter 16 Palladium Nanoscale Catalysts in Ionic Liquids: Coupling and Hydrogenation Reactions 393 Martin H G ... ionic liquid technology by drawing on the inherent ability of the chloroaluminate(III) ionic liquids to catalyse cationic polymerisation reactions, as Advanced Applications of Ionic Liquids in...
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Báo cáo lâm nghiệp: "Seasonal ionic exchange in two-layer canopies and total deposition in a subtropical evergreen mixed forest in central-south China" pps
Ngày tải lên :
07/08/2014, 16:20
... 5.5, and 4.3 in rainwater, 6.0, 6.6, 6.2, and 4.3 in throughfall and 7.0, 6.9, 6.1, and 4.7 in sub-throughfall in spring, summer, autumn, and winter, respectively Ion exchange in canopies and ... of rainwater in summer (4.3) and winter (4.3) was very low, being a little bit higher in spring (4.7) As said, rain quantity in spring and summer accounted for more than 70% of annual rainfall ... percentage of DDS O2− in annual DDS O2− was 63.8% in spring, 23.2% in sum4 mer, 38.5% in autumn, and 60.6% in winter Ion exchange in canopies and total deposition 893 15 Figure Seasonal ionic total deposition...
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lipase catalyzed sugar esters synthesis in ionic liquids
Ngày tải lên :
29/07/2015, 03:24
... activity in the synthesis of sugar ester using ionic liquids was investigated In the lipase-catalyzed esterifications of glucose with vinyl laurate or lauric acid in [Bmim][TfO], 2.4 and 4.7 times ... mmol min-1 g-1 by using supersaturated glucose solution in this mixture, compared with reaction using saturated solution After times reuse of Novozym 435, 86% of initial activity was remained in ... strengthening mass transfer of liquid-liquid heterogeneous systems In this study, the synthesis of sugars esters by using lipase-catalyzed esterification with fatty acids in ionic liquids mixtures by using...
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IONIC LIQUIDS FOR CELLULOSE PROCESSING AND CARBON CAPTURE FROM FIRST PRINCIPLES CALCULATIONS TO ATOMISTIC SIMULATIONS
Ngày tải lên :
09/09/2015, 11:17
... With continuous effort by researchers in both academia and industry worldwide, however, they have gained increasing attention in other applications as well With the promising chemical and physical ... molecular understanding for cellulose processing in ILs Chapters 7-9 examine CO2 separation in MOF-supported IL membranes and nitrilebased ILs Finally, the concluding remarks and future recommendations ... Chapter Introduction 1.1 Development of Ionic Liquids 1.2 Structures of Ionic Liquids .2 1.3 Physical and Chemical Properties of Ionic Liquids 1.4 Applications of Ionic...
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Droplet microfluidics with ionic liquids for chemical analysis and separations
Ngày tải lên :
10/09/2015, 09:08
... heat and mass transfer distances Although chemical reactions in microfluidic systems are mostly performed in single phase flow,66 there has been expanding research and industrial interest in compartmentalizing ... viscosities are mixed in a droplet the internal recirculating motions are increased further (Figure 1.6d-f).53 An inert liquid can be inserted within reactant streams prior to merging in a single droplet ... introduced in the liquid flow and initiated internal recirculating motions within the liquid segments.60-62 By implementing the gas-liquid segmented flow with enhanced mixing in the liquid segments in...
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EFFECT OF ANIONS, CATIONS AND IONIC STRENGTH IN THE BATH ON THE cr (III) ELECTRODEPOSITION ẢNH HƯỞNG của ION DƯƠNG, ION âm và NỒNG độ ION TRONG bể mạ đến QUÁ TRÌNH mạ điện cr (III)
Ngày tải lên :
27/02/2016, 10:26
... anti-corrosion of the coatings, all coatings were examined using potentiodynamic polarization in a standard three-electrode cell using platinized titanium electrode and 245 Kỷ yếu hội nghị khoa ... comparing to free solution It can be interpreted that ionic strength increases via rise of the total concentration of ions in the bath, resulting in increase of the solution conductivity and throwing ... 3.5 Corrosion Behavior The polarization curves of coatings in free solution and baths containing Na+ and Mg2+ ions at different ionic strength are shown in Fig 5a, b and c, respectively Fig 5a...
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Cambridge.University.Press.Press.Politics.and.the.Public.Sphere.in.Europe.and.North.America.1760-1820.Jul.2002.pdf
Ngày tải lên :
21/09/2012, 10:58
... liberal press laws were introduced In revolutionary contexts – including Ireland – newspapers were instrumental in the politicisation of populations and in displaying and interpreting the new politics ... Transformation in Early Modern Europe, vols (Cambridge, ), and its abridgement, The Printing Revolution in Early Modern Europe (Cambridge, ) Eisenstein, Printing Press and Eisenstein, Printing ... Holland and Switzerland, which argues for a ‘common rhetoric’, indicating a shared readership and explicitly appealing to a unified ‘public sphere’. Jeremy Popkin argues for a continuity in the...
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International Capital Flows and Boom-Bust Cycles in the Asia Pacific Region +
Ngày tải lên :
24/10/2012, 09:27
... consumption (“CONS”) and investment (“INV”); consumption and investment increase in almost all countries The increase in consumption and investment is especially significant in all the Asian crisis ... highly synchronized and follow business cycles in Japan, while they differ from cycles in Australia and New Zealand On the other hand, greater China, including Hong Kong and Taiwan, show similar ... promotes inter-industry specialization and countries are subject to industry-specific shocks See Frankel and Rose (1998), and Shin and Wang (2004) in our models In particular, we investigate whether...
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Báo cáo y học: " Effect of Weight Reduction on Cardiovascular Risk Factors and CD34-positive Cells in Circulatio"
Ngày tải lên :
25/10/2012, 10:51
... extracellular water, intracellular http://www.medsci.org Int J Med Sci 2011, water and body mass index were determined for each participant before dieting intervention and each six days following intervention ... decrease in their body mass index in an average of 8.1%±2.0% Changes in total body water had inverse correlation with changes in fat mass (r=0.86) and positive correlation with an increase in fat ... metabolism and inflammation, contributing to the maintenance of energy homeostasis and the pathogenesis of obesity-related metabolic and inflammatory complications [4] Endothelial damage and dysfunction...
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Báo cáo y học: "Relationship between Anti-CCP Antibodies and Oxidant and Anti-Oxidant Activity in Patients with Rheumatoid Arthrit"
Ngày tải lên :
25/10/2012, 11:15
... activity in RA patients Anti-CCP antibodies are directed against antigens containing the nonstandard amino acid citrulline, for example, citrullinated fibrin, which is found in the rheumatoid joint ... arthritis Clin Rheumatol 2000;19:275-277 29 Bandt MD, Grossin M, Driss F, Pincemail J, Babin-Chevaye C, Pasquier C Vitamin E uncouples joint destruction and clinical inflammation in a transgenic ... study after having a preliminary evaluation consisting of a brief medical history, smoking and alcohol habits and physical examinations Inflammatory disease activity was defined as a Disease Activity...
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