organic derivatives of amides and imides
Asymmetric synthesis of furan and oxindole derivatives with bifunctional and multifunctional organic catalysts
... in almost all types of reactions, and good selectivities can often be achieved by combining chiral ligands and suitable metals However, high cost and toxicity of the metals, and stringent reaction ... development of asymmetric synthesis of furan and oxindole derivatives with tertiary amine thiourea organocatalysts, including enantioselective synthesis of 3(2H)-furanones and 2,3-dihydrofurans with ... ASYMMETRIC SYNTHESIS OF FURAN AND OXINDOLE DERIVATIVES WITH BIFUNCTIONAL AND MULTIFUNCTIONAL ORGANIC CATALYSTS DOU XIAOWEI (B.Sc., Nanjing Univ.) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY...
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Photodegradation and removal of phenol and phenolic derivatives from petroleum refinery wastewater using nanoparticles of TiO2
... treatment using nanoparticles of TiO2 and UV light The main feature of this work is the use of inexpensive and recoverable catalyst This sort of processes for degradation of organic compounds may be ... dissociation of added sulfuric acid, reduces the chance of adsorption of organic materials into catalyst surface and therefore the rate of oxidation will be reduced Figure Effect of pH on degradiation of ... black run) and with UV light (both with 100 mg L−1 of TiO2, and temperature of 303 K) Figure shows, very low reduction of COD which was found in the absence of light The increase of temperature...
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Tài liệu METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER ppt
... ASTM Annual Book of Standards, Part 31, D3694-78 “Standard Practices for Preparation of Sample Containers and for Preservation of Organic Constituents,” American Society for Testing and Materials, ... levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask and diluting to volume with acetonitrile One of the external standards should be at a ... calibration standards at a minimum of three concentration levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask To each calibration standard,...
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Tài liệu METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER doc
... and 6.7 It is recommended that the secondary dilution standard be prepared at a concentration of 15 µg/mL of each internal standard compound The addition of 10 µL of this standard to 5.0 mL of ... concentration of the stock standard Optionally, stock standard solutions may be prepared using the pure standard material by volumetrically measuring the appropriate amounts and determining the weight of ... program The minimum requirements of this program consist of an initial demonstration of laboratory capability and an ongoing analysis of spiked samples to evaluate and document data quality The...
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Tài liệu Environmental impacts of petroleum production: Fate of inorganic and organic chemicals in produced water from the Osage-Skiatook Petroleum Environmental Research sites, Osage County, Oklahoma doc
... releases of produced water and petroleum and the improper disposal of produced water are national issues that concern managers of Federal, and State lands, as well as oil and gas producers and lessees, ... siltstone, and thin sandstone beds The geologic and climatic settings of the Lester and Branstetter leases resemble that of much of the major southern mid-continent oil- and gas-producing area of the ... and concentrations of selected inorganic and organic chemicals from surface and ground water samples from OSPER ‘A’ and ‘B’ sites and adjoining areas in Osage County, OK are listed in Table and...
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Tài liệu Marketing of Indian Organic Products: Status, Issues, and Prospects pptx
... (NGOs) like AME, and OFAI, producer organizations like VDAI, TOFA, VOFA, and Eco-farms, and certification bodies like Indocert, Ecocert, SKAL, and APOF besides various processors and traders In ... cent of total farming area was under organic production in the EU Some of the countries like Sweden and Austria had 15 per cent and 9.6 per cent of farms and 7.8 per cent and 8.4 per cent of all ... number and age of children and education are important variables in explaining consumer demand for organic products The place of purchase of food and habit persistence related to age and household...
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Tài liệu A Comparison of Conventional and Organic Milk Production Systems in the U.S. potx
... costs for organic and conventional operations employed off-farm, estimated from an econometric model of off-farm labor supply and wages (El-Osta and Ahearn) Any differences between organic and conventional ... smaller organic dairies Production Costs of Conventional and Organic Dairies Mean production costs of and returns to conventional and organic dairy operations in 2005 are shown in table Organic ... of Conventional and Organic Milk Production Systems in the U.S Organic milk production is one the fastest growing segments of organic agriculture in the U.S Between 2000 and 2005 the number of...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER pot
... The addition of 10 µL of this solution of mL of sample or standard is equivalent to a concentration of 30 µg/L of each surrogate standard 6.8 BFB Standard—Prepare a 25 µg/mL solution of BFB in methanol ... 51, and 86 101 103 96 61 and 98 63 65, 83, 85, 98, and 100 96 61 and 98 83 85 98 62, 64, and 100 97 99, 117, and 119 117 119 and 121 127 83, 85, and 129 112 63, 65, and 114 75 77 130 95, 97, and ... 15-40% of Mass 95 30-60% of Mass 95 Base Peak, 100% Relative Abundance 5-9% of Mass 95 50% of Mass 95 5-9% of Mass 174 >95% but 101% of Mass 174 5-9% of Mass 176 Table...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 604—PHENOLS docx
... “Microdetermination of Derivatives of Phenols and Mercaptans by Means of Electron Capture Gas Chromatography,” Analytical Chemistry, 40, 1009 (1968) ASTM Annual Book of Standards, Part 31, D3694-78 “Standard ... levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask and diluting to volume with 2-propanol One of the external standards should be at a concentration ... calibration standards at a minimum of three concentration levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask To each calibration standard,...
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Atmospheric volatile organic compound measurements during the Pittsburgh Air Quality Study: Results, interpretation, and quantification of primary and secondary contributions pot
... production of secondary organic aerosol (SOA) depends on the chemical state of the atmosphere, both in terms of oxidative capacity, and in term of the quantity and nature of gas phase organic material ... the roles of primary and secondary OC production is an important step toward an improved understanding and modeling of the sources, morphology and effects of aerosol OC The technique of minimizing ... times that of t-2-butene) and/ or it was offset by increased emissions 3.3.3 Quantification of Secondary Organic Aerosol [57] Organic carbon (OC) constitutes a significant fraction of atmospheric...
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Báo cáo khoa học: The signature amidase from Sulfolobus solfataricus belongs to the CX3C subgroup of enzymes cleaving both amides and nitriles Ser195 and Cys145 are predicted to be the active site nucleophiles pot
... 5B) One of its amino ˚ groups is about 2.6 A from the Oc atom of Ser171 ˚ and 2.5 A from the thiol group of Cys145 4720 Even taking into account all of the limitations of molecular models of proteins ... experimental analysis of the activity of the mutant SsAH-K96R on aliphatic amides and nitriles strengthens this hypothesis Another line of evidence comes from the results of the inhibition studies ... be responsible for the hydrolysis of nitriles ˚ Indeed, the sulfur atom of Cys145 is at about A ˚ from the Oc atom of Ser171 and 2.5 A from the amino group of Lys96 (Fig 4) This putative alternative...
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Liquid-Delivery Metal-Organic Chemical Vapour Deposition of Perovskites and Perovskite-Like Compounds pdf
... where γfilm and γsubs are the surface free energies of film and substrate, respectively, and γi the free energy of the interface The latter quantity depends on the strain and the strength of chemical ... parameter of the film and the substrate, and p is a factor dependent on elastic constants θB is the Bragg angle of the substrate and ∆θ is the difference between the Bragg angles of the film and the ... on the order of millimeters by millimeters and a depth of field on the order of millimeters The AFM can only show a maximum height on the order of micrometers and a maximum area of around 100×100...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 605—BENZIDINES pdf
... levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask and diluting to volume with mobile phase One of the external standards should be at a ... calibration standards at a minimum of three concentration levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask To each calibration standard, ... known constant amount of one or more internal standards, and dilute to volume with mobile phase One of the standards should be at a concentration near, but above, the MDL and the other concentrations...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 611—HALOETHERS potx
... levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask and diluting to volume with hexane One of the external standards should be at a concentration ... calibration standards at a minimum of three concentration levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask To each calibration standard, ... a known constant amount of one or more internal standards, and dilute to volume with hexane One of the standards should be at a concentration near, but above, the MDL and the other concentrations...
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Controls of bioavailability and biodegradability of dissolved organic matter in soils
... the stabilisation and destabilisation of soil organic matter, and thus, in C dynamics and C pools of soils Sollins et al (1996) present a conceptual model of SOM stabilisation and destabilisation ... effects of Al and Fe on citrate mineralisation only at molar ratios of at least 0.97 and suspect that this is likely due to precipitation of metal oxides and subsequent sorption of their organic ... three general sets of characteristics affecting the stability of organic matter: recalcitrance, interactions and accessibility For the conceptual understanding of mechanisms and controls, this...
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Báo cáo khóa học: Mechanistic insight into the peroxidase catalyzed nitration of tyrosine derivatives by nitrite and hydrogen peroxide doc
... times of and were 11.5 and 12.7 min, respectively, and those of the corresponding nitration products, 3-(4-hydroxy-3-nitrophenyl)-propionic acid and 4-hydroxy-3-nitrobenzonitrile, were 13.9 and ... peaks at 11.1 and 11.3 min, and minor peaks for unreacted and six other products with retention times of 9.9, 10.4, 11.8, 12.0, 12.2 and 12.4 Fig Biphasic behavior of the rate of HRP-mediated ... coefcient of the dimeric product of the reaction This e322 value was obtained from a plot of absorbance versus number of moles of hydrogen peroxide consumed in the HRP-catalyzed oxidation of 4, where...
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APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 607—NITROSAMINES docx
... “Standard Practices for Preparation of Sample Containers and for Preservation of Organic Constituents,” American Society for Testing and Materials, Philadelphia Buglass, A.J., Challis, B.C., and ... levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask and diluting to volume with methanol One of the external standards should be at a concentration ... calibration standards at a minimum of three concentration levels for each parameter of interest by adding volumes of one or more stock standards to a volumetric flask To each calibration standard,...
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Effects of cattle and poultry manures on organic matter content and adsorption complex of a sandy soil under cassava cultivation (Manihot esculenta, Crantz) doc
... Total nitrogen (Nt) and organic nitrogen (Norg) were calculated as the sum of Kjeldahl-N and NO3 N and as the difference between Nt and the inorganic nitrogen (sum of NH4+-N and NO3-N), respectively ... manures which has three roles of organic matter sources, of protection of the soil against erosion and of increase in the activity of earthworms which reduce water runoff (Hole et al., 2005; Parfitt ... physical and chemical (carbon, nitrogen and organic matter content) properties at - 22 and 22 - 55 cm soil layers in the ferrallitic soil of the Toumodi area, Côte d’Ivoire Data are means ± standard...
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