Organic chemitry t8 nucleophilic substitution on the carbonyl group
Organic chemitry t8 nucleophilic substitution on the carbonyl group
... mechanisms. In the intermediate of the first mechanism, the carbonyl oxygen becomes singly bonded to the carbonyl carbon, and in the transition state of the second mechanism, it remains doubly bonded ... not stay doubly bonded to the carbonyl carbon all the way through the reaction. Conversely, to provide evidence for the second mechanism, they needed a way to sh...
Ngày tải lên: 05/03/2014, 22:28
Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
... Figure 3 shows 3,5-DCP concentrations in the PACT and the control reactors during and after the shock loading of 3,5-DCP. The peak concentration in the PACT and the control reactors were 6.0 ... incubation. The adsorption capacity of PAC decreased with incubation time. In other word, the adsorption capacity of PAC increased with increase in the amount of organic carbo...
Ngày tải lên: 05/09/2013, 08:40
Báo cáo khoa học: Effects of a tryptophanyl substitution on the structure and antimicrobial activity of C-terminally truncated gaegurin 4 doc
... tryptophanyl substitution at position 16 on the biological activity was confirmed for the native GGN4. Consistent with the results of the C-terminally truncated GGN4, the D16W substitution in the native ... helical conformation in the C-terminal part. The dis- ordered conformation in the C-terminal region of D 24)37 GGN4 is probably due to the break of the peptide b...
Ngày tải lên: 31/03/2014, 09:20
Influence of Phosphorus Concentration on the Biodegradation of Dissolved Organic Matter in Lake Biwa, Japan
... contamination. Evaluation of oxygen consumption Oxygen consumption for 5-day incubation (OC obs ) was calculated as the difference between DO before and after incubation. Then, oxygen consumption ... One of the possible hypotheses for the accumulation of COD Mn in Lake Biwa is the deterioration of bioactivity for DOM degradation. Accordingly, the influence of phosphorus con...
Ngày tải lên: 05/09/2013, 10:17
Tài liệu Báo cáo " The effect of cobalt substitution on structure and magnetic properties of nickel ferrite " pptx
... temperature.These plots show that an increase in Co 2+ doping yields monotonic increase in the saturation magnetization of Ni- ferrite which may be due to the substitution of Ni 2+ ions by Co 2+ on the ... parameter with Co 2+ due to the difference in ionic sizes of the component ions. The Co 2+ ions have larger ionic radius (0.78 Å) than Ni 2+ (0.74 Å) and Fe 3+ (0....
Ngày tải lên: 13/02/2014, 04:20
On the Segregation of Genetically Modified, Conventional, and Organic Products in European Agriculture: A Multi-market Equilibrium Analysis doc
... price of conventional food is normalized to 1, so that the amount of conventional food production is the value of conventional food production. The yield for the conventional product is then calculated by ... trace the main economic implications of the adoption of GM products. The economic effects that we focus on relate to the direction of price changes for traditional, or...
Ngày tải lên: 05/03/2014, 20:20
THE EFFECTS OF THREE ORGANIC CHEMICALS ON THE UPPER THERMAL TOLERANCES OF FOUR FRESHWATER FISHES potx
... estimated on the basis of the results obtained from acute tests, conducted simultaneously in glass vessels using the same stock solutions of these chemicals, with the fish species as part of the other ... contained no toxicants, although the chlorpyrifos, endosulfan, and phenol treatments contained the same concentration of toxicants used in the acclimation phase (Table 1)....
Ngày tải lên: 14/03/2014, 20:20
The Sustainability of Organic Grain Production on the Canadian Prairies—A Review doc
... that the relative profitability of several organic and conventional crop rotations was heavily dependent on the value of the price premium for the organic product. The net returns for the most ... Most of the information on the benefits and impacts of organic agriculture is based on research from Europe, and there has been comparatively little research focused on...
Ngày tải lên: 14/03/2014, 20:20
Effect of hydrogen peroxide on the destruction of organic contaminants synergism and inhibition in a con
... photogenerated electrons in the conduction band by oxygen reduction is the rate-controlling step in the photocatalytic mechanism [26,54]. Consequently, conditions that favor the removal of conduction band electrons ... func- tion of the magnitude of hydrogen peroxide concentration relative to other reaction conditions (i.e., contaminant con- centration, total organic carbon, UV li...
Ngày tải lên: 16/03/2014, 00:07
One dimensional organic nanostructures a novel approach based on the selective adsorption of organic molecules on silicon nanowires
... chemisorption of specific molecules on silicon nanowires. STM data demonstrate that depending on the molecular functional groups, the molecules adsorb either randomly on the substrate or preferentially on ... the observed LDOS is a convolution of the LDOS of the SiNWs and that of the adsorbed PQ aggregates. Therefore, the contribution of the LDOS of the SiNWs at th...
Ngày tải lên: 16/03/2014, 15:35