... or metal elements can be captured by a silicon carbide candle filter that removes small particles from the gas phase, but some of volatile elements pass through the filter and are present in the ... strong effects on SOFC performance For alkali metals (Na and K), the concentrations are limited to 0.1 ppm or 50 ppb in fuel gas according to specifications for the protection of gas turbine hardware ... Mn, Mo, Ni, P, Sr, Pb, Ti, V, and Zn defined as trace elements (TE) The effects of the sampling system and gasification system on the measurement were determined Mass balances for ME and TE are reported
Ngày tải lên: 29/07/2016, 14:03
... Effect of pH on the recoveries of studied metal ions (V = 50 mL, n = 3). 2.3 Effect of type and concentration of eluent The effect of type, concentration, and volume of eluents on the recoveries of ... mg of the chelating with 300–500 mg of the resin as shown in Figure 5 Therefore, 300 mg was chosen as the optimum resin amount for further experiments 2.6 Effect of sample volume The effect of ... linear The experimental enhancement factors (EFs) and theoretical preconcentration factors (PFs) were calculated from the ratio of the slopes of the calibration equations and from the ratio of the
Ngày tải lên: 12/01/2022, 23:12
The-Role-of-Metal-Mining-in-the-Alaska-Economy
... such as the “Asian Flu” of the 1990s.The profitability of any particular metal mining, processing, and refining operation depends upon the international price of the commodity as well as the local ... required to pay the state a 3 percent of net income as a production royalty In calculating the royalty owed to the state, the costs of developing the mine, the costs of operating the mine, investment ... important historical roles of mineral development, it is often assumed that the future development of the Alaskan economy will also depend on the further development of the State’s metal deposits This
Ngày tải lên: 19/10/2022, 23:16
Effect of urban emissions on the horizontal distribution of metal concentration in sediments in the vicinity of Asian large cities
... mgZn/kg based on the uniform distribution of these metals in the sediments of the lake The higher concentration in the northwest part of the lake is probably due to reverse flow of the polluted Pasig ... in the eastern side of Manila Bay The concentration profiles in the sea sediments show the decrease in lead and zinc concentrations in the sediments with the increase in the distance between the ... Accuracy of the measurement was confirmed through the analysis of Laguna Lake samples, as shown in the result section of the paper In addition, the accuracy was also confirmed through the monitoring
Ngày tải lên: 05/09/2013, 09:08
the role of morphology and crystallographic structure of metal oxides
... that the width of the necks determines the height of the potential barrier for current carriers, while the length of the necks determines the depletion-layer width of the ... depends on the material and the nature of the detected gas. The influence of the contacts on sensor response with decreased length of the sensitive layer could become stronger because of another reason ... cases, the potential barrier b etween the metal of the electrode and the gas-sensing oxide could be comparable to the potential barriers between the metal oxide grains. Under these circumstances, the
Ngày tải lên: 20/03/2014, 13:11
Báo cáo khoa học: Dissecting the role of the N-terminal metal-binding domains in activating the yeast copper ATPase in vivo pptx
... these inhibitory domain–domain interactions are relieved by binding of the metal to the N-terminus of the ATPase. To further study the role of the Ccc2 N-terminus in the overall function of the ... information about the functionality of the ATPase, they are all interpreted independently of the metallo-chaperone. Indeed, studying the Atx1–Ccc2 route in vivo remains challenging, because of the existence of ... The current hypothesis involves domain–domain interac- tions between the N-terminus and other domains of the ATPase. Indeed, in vitro studies of the purified N-terminus and catalytic loop of the Wilson
Ngày tải lên: 23/03/2014, 05:22
Báo cáo khoa học: Using directed evolution to improve the solubility of the C-terminal domain of Escherichia coli aminopeptidase P Implications for metal binding and protein stability pptx
... ZnCl2 inhibits the activity of AMPP [1] Here, the presence of ZnCl2 in the dialysis buffer led to the precipitation of each of the three proteins Neither the intact protein nor the Table 1 Sequence ... another, thus destabiliz-ing the protein For the native protein, the presence of the N-terminal domain and the oligomeric structure of the protein may be necessary to maintain the structure of the ... the solu-bility of the domain In the case of the AMPP protein, the boundary of the domain would have been better determined from an inspection of the structure rather than by the experimental
Ngày tải lên: 23/03/2014, 07:20
The Impact of Equipment Availability and Reliability on Mission Outcomes - An Initial Look pdf
... indicated by the number on top of each bar, while the upper dashed line indicates the number of enemy platforms killed and the lower dashed line indicates the size of the U.S force immediately at the ... degradation in the combat performance of the U.S heavy brigade This degradation becomes more pronounced the farther the distance traveled For example, for the 100-km road march, the size of the U.S ... outcomes As the chart shows, the combat capability of the force degrades further as the force ages and reliability degrades In the worst case, indicated by the rightmost set of bars, the exchange
Ngày tải lên: 29/03/2014, 16:20
SYNTHESIZE AND INVESTIGATE THE CATALYTIC ACTIVITY OF THREE-WAY CATALYSTS BASED ON MIXED METAL OXIDES FOR THE TREATMENT OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINE
... choice and loading of the NM is a compromise between the required efficiency of the converter and the market price of the NM However, the application of noble metals for the treatment of exhaust gas ... adsorption of reactant molecules on the semi-conducting surface; the formation of these is a function of the electronic properties of the solid, and the structure and kind of bonds (6) The catalyst ... for these three scales of particulate The fundamental unit of the soot agglomerates are the spherules with diameters of 10–50 nm Most of these particles are almost spherical, but a number of less
Ngày tải lên: 12/05/2014, 17:14
báo cáo hóa học: " The evolution of methods for the capture of human movement leading to markerless motion capture for biomechanical applications" pptx
... one of the primary technical factors limiting the advancement of the study of human movement is the measurement of skeletal movement from markers or sen-sors placed on the skin The movement of the ... limit the risk of producing artifact due to markers or the constraints of the testing methods For example, the constraints of the laboratory environment as well as the markers placed on the subjects ... need to capture the kinematics and kinetics of human movement without the constraints of the labora-tory or the encumbrance of placing markers on the limb segments Second, we need to relate the external
Ngày tải lên: 19/06/2014, 10:20
báo cáo hóa học: " The role of interleukin-12 in the heavy metal-elicited immunomodulation: relevance of various evaluation methods" potx
... variability, variety of methodologicalregimes such as the metal form, duration of exposure, the dosage applied as well as the activity of the cells [9] The biological indicator or the read-out system ... requires the presence of IL-12, Th2 cells response warrants the pres-ence of IL-4 [24] Moreover, both types cross-regulate each other in a variety of ways [20,24,25] The dominance of one of these ... mice In case of Hg-expo-sure, on the other hand, the decrease in IFN-γ levels, due to the progressive exposure to the metal beyond the first three weeks, was significantly correlated to the decrease
Ngày tải lên: 20/06/2014, 00:20
báo cáo hóa học:" Risk factor analysis for early femoral failure in metal-on-metal hip resurfacing arthroplasty: the effect of bone density and body mass index" potx
... take place as a result of the following thermal osteonecrosis of the underlying bone [2, 10] Both of these complications are unique to hip resurfacing procedures and neither occurred in stemmed ... a single surgeon’s experience with metal-on-metal HRA, the purpose of this study was: (1) to report our clinical results of a group of consecutive metal-on-metal HRA cases for which bone mineral ... fixation type, and the size of the femoral component were each defined as explanatory variables These explanatory variables of age, gender, body mass index, T-score, and the size of the femoral component
Ngày tải lên: 20/06/2014, 07:20
THE IMPORTANCE OF RECYCLING TO THE ENVIRONMENTAL PROFILE OF METAL PRODUCTS pptx
... meets the needs of the present without compromising the ability of future generations to meet their own needs” as originally defined in the Brundtland Commission report of 1986 How do you assess the ... market prices fluctuate, the recovery of metals typically represent the largest source of revenue for material recovery facilities (Further enhancing the economics of recycling through advances ... practices is the predominant theme of many of the technical papers prepared for this conference ) As previously mentioned, we also need to look at social consequences of an activity to support the principal
Ngày tải lên: 28/06/2014, 23:20
Báo cáo nghiên cứu khoa học: " THE SOFTENING IN PLASTIC DEFORMATION OF METAL" pps
... mechanism of softening The voids are nucleated at the particle-matrix interface due to the agglutinate loss or the particle crack when the strain reaches critical value The growth of voids will then ... uniformly arrayed in material The chief goal of this paper is to examine the growth of voids and the strain softening of structure inside the ductile metal with the initial spherical voids and ... by the curve with the negative slope The initial shapes of micro-voids are multiform and complex On the other hand, their distribution is random and difficult to determine For the feasibility of
Ngày tải lên: 22/07/2014, 06:20
Báo cáo y học: "Comparative study between the Hybrid Capture II test and PCR based assay for the detection of human papillomavirus DNA in oral submucous fibrosis and oral squamous cell carcinoma" pdf
... relates to the index of the intensity of HPV infection This ratio of any specimen represents empirically a relative measure of the viral load in it Cut off value (RLU of specimen/ mean RLU of PC) ... pg/ml of sample Interpretation of Cut off value (RLU of specimen/mean RLU of PC) off ratio of 0 to 0.99 is negative for HR HPV; Cut-off ratio greater than 1.0 positive for HR HPV The cut off ratio ... 34.23% females) On the basis of demographic distribution of the patients with 208 cases of the OSMF, of which 105 (50.48%) and 103 (49.52%) cases were below and above the age of 45 years respec-tively
Ngày tải lên: 12/08/2014, 01:22
Assessing the Hazard of Metals and Inorganic Metal Substances in Aquatic and Terrestrial Systems - Chapter 1 ppsx
... the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. Information contained herein does not necessar- ily reflect the ... Incorporation of BAF into Hazard Assessment .12 2 6.5 Ranking Metal Toxicity in. .. metals and metal substances During the first day of the workshop, presentations were given on the ... of PBT for metals These presentations provided the 1 © 2007 by the Society of Environmental Toxicology and Chemistry... Model (BLM) (Di Toro et al 20 01, 2005) The purpose of
Ngày tải lên: 12/08/2014, 04:22
Assessing the Hazard of Metals and Inorganic Metal Substances in Aquatic and Terrestrial Systems - Chapter 4 pptx
... site of exposure (gill vs gut), the metal, and the mechanisms compart-by which the metal integrates with the physiology of the animal The bioreactivepool includes metals that can be incorporated ... of metals in the catalyticcentre of the molecule) When the rate of metal uptake exceeds the rate of eitherelimination or detoxification, metal will accumulate in the bioreactive pool, andtoxicity ... Consequently, metal uptake from the environment can be a function of the exposure concentration, the geochemical form, the biology of thespecies, physiological mechanisms, and interactions among these
Ngày tải lên: 12/08/2014, 04:22
Assessing the Hazard of Metals and Inorganic Metal Substances in Aquatic and Terrestrial Systems - Chapter 5 ppsx
... species, and(2) the toxicity of these species, rather than (3) the toxicity of the originalmetal substance • There is no doubt that characteristics such as solubility and transformation(and their kinetics), ... set of tests conditions, for example, bioavail-ability or common hardness (Meyer 1999) The ultimate objective is to assess thetoxicity of the metal species rather than that of the original metal ... involve thefollowing steps: (1) diffusion of the metal from the bulk solution to the biologicalsurface, (2) sorption/surface complexation of the metal at passive binding sites withinthe protective
Ngày tải lên: 12/08/2014, 04:22
Assessing the hazard of metals and inorganic metal substances in aquatic and terrestrial systems
... significantly alter the ratio of loading to resultant free metal ion concentration. Although the ranking of metals did not change among the scenarios examined, the magnitude of the metal- to -metal differences ... should assess: (1) the rate of metal release from the pure compound, and (2) the further interaction of the released metal with the soil or soil pore water. 3.4.3 COMBINATIONS OF COMMERCIAL COMPOUNDS Whereas ... classification of the substance, the value of Me T (aq) (representing the dissolved metal) at 7 days is compared to an L(E)C 50 selected for the classification of the metal substance. The mass loading...
Ngày tải lên: 16/03/2014, 11:45
Tài liệu HOW INTERNET PROTOCOL-ENABLED SERVICES ARE CHANGING THE FACE OF COMMUNICATIONS: A LOOK AT VIDEO AND DATA SERVICES ppt
... considers the shape of future laws, we think that a look back is constructive. In 1996, this committee wrote into the act the following statement: ‘‘It is the policy of the United States to promote the ... more of the specific types of programming they want or how they can protect their families from unwanted programs or why diverse programming struggles to get on the air, then you must pull back the ... location of the device, we can make the assumption of what channels are received there. So instead of putting up an antenna, we are able to broadcast using the Internet. Now in the interest of time...
Ngày tải lên: 18/02/2014, 00:20
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