examples of heterogeneous catalysis in water remediation and preferential co oxidation
Chemical of alumina reactions in aqueous solution and its application in water treatment
... industrial point of view Most solid phases in natural water contain aluminium oxides Alumina plays an important role in regulating 41 41 42 43 44 45 45 the composition of soilwater, sedimentwater, ... environment and its growing application in drinking and wastewater purification, the knowledge of aluminas structure and possible interactions in water are of great importance The properties of metal ... used mainly for the removal of several organic compounds from water These are: dissolved hazardous organic contaminants; compounds responsible for colour and odour of water; oxidation and disinfection...
Ngày tải lên: 15/03/2014, 23:22
Báo cáo Y học: The role of arginine residues in substrate binding and catalysis by deacetoxycephalosporin C synthase potx
... 10–12), consistent with loss of penicillin binding Arginines 306 and 307 Fig Proposed binding mode for penicillin N to the iron(II)-2-oxoglutarate complex of DAOCS, showing possible involvement of ... result in substantial uncoupling of penicillin oxidation from 2-oxoglutarate (i.e there is a less than stoichiometric oxidation of the penicillin substrate) Uncoupling of 2-oxoglutarate conversion ... ferryl intermediate is important for optimum coupling between 2-oxoglutarate and penicillin conversion Recent studies have suggested that the C-terminus of DAOCS (including arginines 306 and 307)...
Ngày tải lên: 18/03/2014, 01:20
Behavior of Pipe Piles in Sand : Plugging and Pore-Water Pressure Generation During Installation and Loading pptx
... Iskander: Behavior of Pipe Piles in Sand, SSGG, pp 1–6 springerlink.com © Springer-Verlag Berlin Heidelberg 2010 Introduction uncertainties in the behavior of the soil core (plug) during driving ... Plugging of Piles during Installation .26 3.2.2 Plugging of Piles during Static Loading 26 3.2.3 Plugging of Piles during Cyclic Loading 27 3.3 Buildup of Pore Pressures during Driving ... Iskander: Behavior of Pipe Piles in Sand, SSGG, pp 25–33 springerlink.com © Springer-Verlag Berlin Heidelberg 2010 26 Installation Effects on the Capacity of Piles in Sand 3.2.1 Plugging of Piles...
Ngày tải lên: 31/03/2014, 16:20
Báo cáo y học: "Preventive effects of Flos Perariae (Gehua) water extract and its active ingredient puerarin in rodent alcoholism models" pps
... al Chinese Medicine 2010, 5:36 http://www.cmjournal.org/content/5/1/36 to both alcohol metabolism and the reward circuits in the brain [11] Isoflavones including daidzein, daidzin and puerarin ... of some standards including puerarin in standard solution and in FPE Fourteen (14) constituents were identified with RPLC fingerprinting as 4’-O-glucopyranoside, 3’-methyoxy-4’-O-glucopyranoside, ... 4’,7-O-glucopyranoside, puerarin, 6’-O- xylosylpuerarin, mirificin, daidzin, 3’-methoxypuerarin, genistin, sophoraside A, ononin, daidzein, genistein and formononetin Among them, the abundance of puerarin...
Ngày tải lên: 13/08/2014, 14:20
Estimation and control of contaminant transport in water reservoirs
... determine and remove any (suspected) contaminants as much as possible out of the water system Estimating and locating contaminant sources and then applying the control to flush them out of the water ... none Coefficients in the mode amplitude equations of contaminant none B The local width of the domain cp The specific heat of water c A contaminant concentration D Physical and computational domain ... strategy consists of the injection of clean water from a reservoir at a nearby point into the river in order to dilute the contaminant in the water up to a certain level in a short period of time...
Ngày tải lên: 09/09/2015, 10:06
Kinetics of natural organic matter as the initiator, promoter and inhibitor in water ozonation and its influences on the removal of ibuprofen
... Validation of the new Rct expression and the new method for the determination of rate constants of initiator, promoter and inhibitor in water ozonation 21 2.4.2 Determination of the rate constants ... rate constants of NOM in water ozonation and to study their influences on the removal of ibuprofen, a commonly detected pharmaceutical compound in surface water In this study, a new method integrating ... Reactions of ozone with the presence of foreign compounds acting as the initiator, promoter and inhibitor [26] Considering all reactions leading to the decomposition of ozone and assuming that...
Ngày tải lên: 09/09/2015, 10:08
Applications of heterogeneous catalysts in synthesis of fine chemicals and rare sugars
... advantages of heterogeneous catalysis over homogeneous catalysis such as ease of handling, separation from the reaction mixtures and recovery of the catalysts, heterogeneous catalysts are increasingly ... isomerization of -pinene to -pinene [40] MgO and CaO have excellent activities for isomerization of 1-butene and 1,4-pentadiene and, particularly, for isomerization of compounds containing heteroatoms, ... to 800 ° Common oxidation states of palladium are 0, +1, +2 and +4, although C originally +3 was thought of as one of the fundamental oxidation states of palladium In the field of fine chemicals,...
Ngày tải lên: 09/09/2015, 10:17
Heterogeneous catalysis in protodecarboxylation and c c bond formation 1
... homocoupling of bromobenzene carried out in a closed system in the presence of (♦) no Cs 2CO3 , (■) mmol Cs 2CO3 , and (▲) mmol Cs 2CO3 79 Figure 3.4 Kinetic profile of recycling test carried out in ... spectrum of the homocoupling of bromobenzene 95 Figure 3.10 GC spectrum of the homocoupling of chlorobenzene 95 Figure 3.11 GC spectrum of homocoupling of iodobenzene 96 Figure 3.12 GC spectrum of ... Figure 5.9 Kinetic profile of protodecarboxylation of 2nitrobenzoic acid carried out in the presence of (♦) Li 2CO3 , (■) Na 2CO3 , (▲) K 2CO3 , (x) Cs 2CO3 152 Figure 5.10 Kinetic profile of protodecarboxylation...
Ngày tải lên: 10/09/2015, 09:07
Heterogeneous catalysis in protodecarboxylation and c c bond formation 2
... surface of a solid catalyst have an incomplete coordination shell There are more highly coordinated atoms within planes, and coordinatively unsaturated atoms in edges and at corners The amount and ... and R2 = alkyl, aryl and alkenyl, M = Mg (Kumada coupling), Zn (Negishi coupling), SnR’3 (Stille coupling), B(OR’)2 (Suzuki coupling) In general, the steps involved in the mechanism of such coupling ... H+ OH2 (b) Migratory insertion of alkyl group O O CO OC OC CO C OC CO M M OC CH3 OC CH3 C + CO OC CO M CH3 OC CO CO CO (c) Migratory insertion of hydride/ beta-hydride elimination (reverse) H...
Ngày tải lên: 10/09/2015, 09:08
Development of novel chitosan based hollow fiber membranes for applications in water treatment and bioengineering
... Figure 6.2 Schematic diagram of continuous separation of synthetic wastewater nitrogen cylinder; pressure meter; sealed container; beaker containing D.I water; circulating pump; hollow fiber module; ... different conditions: (a) cross-sections, outer and inner surfaces of membranes using 10% acetic acid as inner coagulant, (b) typical cross-section of CS6EG20 using water as inner coagulant Note: In ... retained Those that not have specific affinity with the resins will pass through the column and exit in the permeate Affinity resins retain and separate substances according to chemical interactions...
Ngày tải lên: 14/09/2015, 08:49
effects of magnesiumphosphoruspotassium containing in water on molting, growth and survival rate of the white shrimp (litopenaeus vannamei) juveniles, reared in low salinity water
... occurring in the molting cycle of shrimp (Cobb and Bryant F, 1977) Stage of molt Status of cuticle Events Postmolt Initially soft becoming increasingly harder - Continued water absorption Intermolt ... deficiencies in minerals of pond water Therefore, direct supplementation of macro-minerals as magnesium, phosphorus, and potassium in the water instead of food are of primary concern In this study, molting ... lose most of their body content of minerals during molt and replace it from the water White shrimp live in an environment that is hypertonic and continually drink small amounts of water and thus...
Ngày tải lên: 22/09/2015, 12:38
Effects of the composition of suspended particles in water on the photosynthetically usable radiation and remote sensing reflectance
... be detected by considering kinetic parameters Nevertheless, in order to achieve a complete understanding of amputee locomotion, both kinematics and kinetics parameters must be considered 22 Hannah ... 25% to 40% into stance phase and the second peak at 65% to 85% into stance Figure 2-8: Schematic drawing of Sander's interface stress transducer [Source: Sanders and Daly, 1993] Sanders and Daly ... 2; EFFECTS OF CORONAL ANGULAR SOCKET MALALIGNMENTS ON SOCKET KINETICS AND LOWER LIMB JOINT KINEMATICS PARAMETERS, (B) CORRESPONDING PROSTHETIC SIDE HIP JOINT ANGLES, (C) CORRESPONDING PROSTHETIC...
Ngày tải lên: 05/10/2015, 19:01
The past, present and future of heterogeneous catalysis
... Dehydrogenation of alcohols (ethanol) Oxidation of alcohol Decomposition of H2 O2 and NH3 Hydrolysis of starch to glucose Combustion Decomposition NH3 Oxidation Oxidation SO2 to SO3 (contact process) ... sacrificial-reagent-containing watersplitting systems and overall water- splitting systems Thus far, the sacrificial-reagent-containing water- splitting systems constructed from the Pt/CdS, Pt-PdS/CdS, and Zn/Cr ... processes Finally, there is a need for theoretical studies in this new field, assisting the design of MOFs and providing insight into the interaction of the substrates and MOFs Clarifying the reaction...
Ngày tải lên: 09/10/2015, 00:06
effect of probiotics suplement in water on growth and survival rate of cobia larvae (rachycentron canadum)
... rate of cobia larvae during 21 days 17 Table 4.3: Coefficience of variance of cobia larval length after 21 days of rearing 19 List of Figures Figure 4.1a: Variation of temperature during ... effects of probiotics to the growth and survival rates of cobia larvae in order to determine suitable level of probiotics 1.3 Content of the study Study on the effect of probiotics supplemented in water ... 2.1.5: Cobia is cultured in tank at Brackish Water Hatchery of CAF 13 2.2 Overview about the status of cobia production and study in the world Cobia study was first conducted by collecting the...
Ngày tải lên: 18/11/2015, 22:22
Effect of Process Parameters on the Degradation of Polychlorinated Biphenyls in Water Matrix using UV/H2O2
... adjusting the pH of the aqueous PCB solutions Effect of Initial PCB Concentration The results of the degradation of PCBs at different initial concentrations are shown in Figs and In all the initial ... premise Increasing the initial H2O2 dosage showed increasing percentage PCB degradation, observed in Fig 3, at initial H2O2 concentration of 8.8mM and 17.6 mM When H2O2 concentration was increased ... adjustment of the pH of the solution was done using 1.0N NaOH and 1.0N H2SO4 The effect of the initial pH of the solution was evaluated using pH values of 3, 7, 5.8 and 10 For the effect of initial...
Ngày tải lên: 05/09/2013, 09:08
Alternative Processing Technologies for the Control of Spoilage Bacteria in Fruit Juices and Beverages
... growing of fruit, harvesting, postharvest handling, washing, and cooling and storage PREVENTIVE MEASURES IN THE ORCHARD Contamination of fruits with feces of animals such as deer,8 seagulls,9 and ... microbiological contamination, including contamination with E coli, and therefore should be avoided.11–13 Another important source of E coli O157:H7 infections is drinking water Waterborne transmission of ... implicated in Salmonella and E coli O157:H7 outbreaks Control of microbial contamination of fruit and fruit juice involves care at all stages of production, including preharvest practices of planting,...
Ngày tải lên: 25/10/2013, 21:20
Contrative analysis of cohesive devices in english texts and those in vietnamese ones
... Contrastive analysis of Cohesive devices in English texts and those in Vietnamese ones Table of contents Page Acknowledgements Table of contents Part A: introduction I II III ... Characteristic of a text 1.2.1 General features 1.2.2 Specific features of the text The concept about cohesion-coherence in text 2.1 Cohesion in text 2.2 Coherence in text The relationship among : cohesion ... Vinh University Contrastive analysis of Cohesive devices in English texts and those in Vietnamese ones 2.4.1.2 Indirect repetition 2.4.2 Lexical collocation 2.5 Summary 22 23 24 CHAPTER 3: CONTRASTIVE...
Ngày tải lên: 12/12/2013, 00:03
Evaluation of sterilization possibility in water environment of activated nano mno2 coated on calcined laterite
... height of BRM column and the flow rate of water strongly influence the sterilizing ability The sterilizing ability of column increases along with the increase of the BRM layer height In contrast, ... magnification of 100000 times A: Before coating B: After coating Figure 7: Creation of adsorbent coating by nano MnO2 particles (100k) A: Before coating B: After coating Figure 3: Creation of adsorbent coating ... as indicating bacteria for all bacterial removing investigation The bacteria number was determined in the initial water sample and followed the time of sterilizing process Static and dynamic condition...
Ngày tải lên: 10/02/2014, 15:24