preparation and distribution of audit reports
Preparation and characterization of the PVDF-based composite membrane for direct methanol fuel cells
Ngày tải lên :
05/09/2013, 16:11
... diameter of the PVDF membrane, the PVDF-PS membrane and the PVDF-SPS membrane is 0.25 µm, 0.12 µm and 0.16 µm, respectively It can be seen that the polymerization of styrene and the blending of PS and ... (DMAc) firstly, and then styrene, divinylbenzene (DVB) and benzoyl peroxide (BPO) were added to the solution and stirred with water bath at 343 K The dosage of PVDF, styrene, DVB and BPO was that ... International Journal of Energy and Environment (IJEE), Volume 1, Issue 4, 2010, pp.643-656 645 2.5 Measurement of proton conductivity The proton conductivity of the PVDF-SPS membrane and Nafion-117...
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User’s perceptions and uses of financial reports of small and medium companies (SMCs) in transitional economies
Ngày tải lên :
25/12/2013, 15:10
... Phương pháp nghiên cứu khoa học “User’s perceptions and uses of financial reports of small and medium companies (SMCs) in transitional economies” thật cần thiết Đọc nghiên...
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Tài liệu Báo cáo " Preparation and characteristics of LiF:Mg,Cu,Na,Si thermoluminescent material " pptx
Ngày tải lên :
13/02/2014, 04:20
... range of 227-247 o C and the ratio of the height of the main peak to that of the other small peaks is rather great In order to obtain high sensitive LiF:Mg,Cu,Na,Si TL powder, the optimum preparation ... as a single dopant and its concentration was calculated as total of Na and Si because the compound Na2 SiO3.9H2 O was added) The X-ray diffraction (XRD) patterns of four kinds of the above mentioned ... appears at 247 o C and the other small peaks are at 150, 205, and 280 o C Comparing the glow curves shown in Fig 2, one can note that the ratio of the height of the main peak to that of the other small...
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Tài liệu Báo cáo "Preparation and characterization of nanocomposite TiO2/SnO2 films " pdf
Ngày tải lên :
13/02/2014, 04:20
... Shi, Preparation, electronic structure and photocatalytic activity of the In2TiO5, Materials Science and Engineering: B Vol 139 (1) (2007) 74 J.H Kim, S.H Kim, et al., Fabrication of nanoporous and ... resistance (RD) and the light resistance (RL) under the irradiation of 7W Hg lamp at the distance of 10cm were measured The calculated ratio of RD/RL was considered as a photoconductivity of obtained ... The results of measurements show that all values RL, RD, and RD/RL strongly depend on the temperature and time of annealing as presented in Fig P.V Nho, T.K Cuong / VNU Journal of Science, Mathematics...
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Tài liệu Global Change and the Function and Distribution of Wetlands ppt
Ngày tải lên :
18/02/2014, 20:20
... (18% of the total land area) if we assume that at least 50% of the area currently classified as ice (Greenland and Antarctica) and tundra would become wetland and the current wetland area of 12.8 ... change because of the resistance of pollens and spores to decay, and their ubiquity and abundance (Traverse 2008) Wetlands are excellent sources of pollen and spores and like macrofossils, palynomorph ... study of wetland fossils and deposits to understand the potential effects of future climate change on wetlands We review the methods and assumptions associated with the use of plant macro- and...
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A New Map of Hollywood: The Production and Distribution of American Motion Pictures pot
Ngày tải lên :
07/03/2014, 15:20
... up of thousands of intricately interdependent firms and, by the same token, of the independent segment of the industry as a substantial locus in its own right of innovation, skilled work, and ... be represented in terms of the size of its component units and the standardization (or variability) of their outputs This idea is codified in Fig 1, where scale and standardization represent orthogonal ... tier Second of all, some independent production companies work partially in the one tier and partially in the other, and others move erratically in and out of the sphere of operation of the Hollywood...
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Concentration and distribution of extractable elements in soil as affected by tillage systems and fertil
Ngày tải lên :
15/03/2014, 23:22
... hypothesize that concentrations of trace elements will increase and stratify in those soils However, as a consequence of the recent introduction of zero tillage and the lack of fertilization history, ... Cd, Cr, Hg, Mo and Se Cobalt, Fe and Mn showed higher concentrations on top soil under CT, with slightly higher pH values and lower OM and Al Only the higher contents of Co, Pb and Zn in top soil ... tillage and fertilization With this limitation, our objective was to study the effects of two extreme tillage systems Žconventional and zero-tillage and phosphorus fertilization on concentration and...
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Preparation and photoluminescence of high density siox nanowires with fe3o4 nanoparticles catalyst
Ngày tải lên :
16/03/2014, 15:11
... temperatures of 1100 and 1200 °C The composition analysis of the products was achieved using EDS Fig 2(d) shows EDS spectrum of the nanowires, indicating that the products only consist of silicon and ... magnification SEM image of nanowire tops, (d) EDS of the nanowires X.J Wang et al / Materials Letters 63 (2009) 1149–1152 1151 Fig TEM and HRTEM images of SiOx nanowires intensities of Fe3O4 nanoparticles ... uniformly covered on the surface of Si(111) substrate, as illustrated in Fig 2(a) and (b) The lengths of these nanowires are in the range of several tens to hundreds of micrometers Fig 2(c) shows...
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Báo cáo Y học: Expression and distribution of penaeidin antimicrobial peptides are regulated by haemocyte reactions in microbial challenged shrimp pptx
Ngày tải lên :
18/03/2014, 01:20
... of the tail of injected shrimps (Fig 9D and E) Confrontation of haemocytes and bacteria The recruitment of penaeidin-positive haemocytes around the site of injection confirmed the importance of ... site of microbial injection precluded both clarification of the mechanisms of penaeidin release from haemocytes, and determination of any potential involvement of penaeidin in the elimination of ... Injection of microorganisms resulted in a dramatic decrease in numbers of both circulating and tissue infiltrating haemocytes within h of injection To study haemocyte behaviour and changes, sections of...
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preparation and characterization of cnts tio2 composites
Ngày tải lên :
20/03/2014, 13:06
... area of CNTs was also the basis for formation of the composites Though the density of TiO2 is larger than that of CNTs, the TiO2 – CNTs composites could form a homogeneous dispersion in ethanol and ... accelerating voltage of 20 kV The samples were ultrasonicated in ethanol for and then a drop of dispersion was deposited on a Cu/Rh grid covered with formvar, a vinyl polymer, and the grid was dried ... spectrum of purified CNTs oxygenated groups which were beneficial to its combination with TiO2 then From the above results, the total area of the C 1s peak region of the MWNTs sample consists of 68.37%...
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preparation and characterization of high surface area nanosheet titania with mesoporous structure
Ngày tải lên :
20/03/2014, 13:06
... 2977 Fig Schematic representation of the growth diagram of nanosheet and nanorods/nanoparticles TiO2 surface area and pore volume of the sample are about 642 m2/g and 0.774 cm3/g, respectively The ... loop), indicating the existence of mesopores The pore size distribution of the sample, as shown in the inset of Fig 4, showed that the nanosheet TiO2 with Fig SEM images of the as-synthesized flower-like ... images of the nanosheet TiO2 calcined at 600 and 700 °C showed almost nanoparticles with a mixture of anatase and rutile TiO2 structure (about 10–50 nm in diameter, at 600 °C, Fig 6(g–h)), and rutile...
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preparation and characterization of monodispersed wo3 nanoclusters on tio2(110)
Ngày tải lên :
20/03/2014, 13:06
... 70 and 140 K (inset of Fig 3): Fig Linear correlation of WNVV/TiLMM AES ratio and W4f intensity with amount of deposited WO3, the latter is plotted in units of WO3 nmÀ2 based QCM measurement of ... lengths and angles) of O, W and Ti are expected but, not surprisingly, are too small to be detectable as shifts of W4f and Ti2p core level BEs and cannot be resolved in STM images The appearance of ... Department of Energy, Of ce of Basic Energy Sciences, Chemical Sciences Division under grant DE-FG02-03ER15480 to the University of Texas and the Center for Materials Chemistry at the University of Texas...
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preparation and properties of magnetic iron oxide nanotubes
Ngày tải lên :
20/03/2014, 13:06
... spectra of samples S2 (a) and S3 (b) can be exclusively indexed to ␣-Fe2 O3 , according to standard data (JCPDS 33-0664) In Fig 1(b) and (c), the reflection peaks of XRD patterns of S2 and S3, ... in sample S3 (e and f) B Lv et al / Particuology (2008) 334–339 and outer and inner diameters of 70–120 nm and 45–80 nm, respectively Fig 3(c) and (d) show the morphologies of Fe3 O4 nanotubes ... López-Urías, and Mu˜ oz-Sandoval (2005) n simulated the micromagnetic property of iron nanorings, and they found large coercive fields for din /dout > 0.5 (din and dout are the inner and outer diameters of...
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Báo cáo khoa học: Preparation and characterization of geodin A bc-crystallin-type protein from a sponge pot
Ngày tải lên :
30/03/2014, 15:20
... in the evolution of bacteria and moulds, and then very early recruited in the metazoans Here we report the expression and purification of recombinant geodin and its thermodynamic and spectroscopic ... IB preparation; lane 4, geodin purified from the S preparation 1024 Fig Gel filtration on Superdex G-75 of the proteins from the S preparation (A) and the IB preparation (B) from the lysate of ... of thermodynamic stability, are of about 80 kJÆmol)1 for human-cS and spherulin 3a, and of 41 and 45 kJÆmol)1 for geodin and protein S, respectively The value of 45 kJÆmol)1 for protein S is...
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us army cooking course - preparation and serving of special
Ngày tải lên :
03/05/2014, 12:14
... requiring a knowledge of the preparation and serving of special food items i CONTENTS LESSON CREDIT HOURS TITLE PAGE Buffet Service 2 Preparation and Serving of Appetizers and Pastry 33 Examination 1 ... ASSIGNMENT SUBJECT Preparation and Serving of Appetizers and Pastry STUDY ASSIGNMENT Lesson Text SCOPE Purpose of appetizers; selecting, preparing, and serving hot and cold canapes and hors d'oeuvres; selecting and ... Planning sitdown and fingertype buffets; menu planning; table arrangement; arrangement and replenishment of food; arrangement of beverages, utensils, and decorations; selection, construction, and display of centerpieces...
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Preparation and characterization of bimodal magnetofluorescent nanoprobes for biomedical application
Ngày tải lên :
14/05/2014, 15:49
... CTAB;[16] and 0.5 mL of the resulting Fe3 O4 /CTAB aqueous solution were diluted with 10 mL of water Then 0.3 mL of NH4 OH aqueous solution, 0.03 mL of tetraethylorthosilicate (TEOS), and 0.5 mL of ... 3.6 g of iron-oleate, 1.91 mL of oleylamine and 0.64 mL of oleic acid were mixed together and were heated at 120∘C for one hour After that, the dark solution was quickly heated up to 200∘C and ... previously published literature Briefly, 127 mg of tellurium powder was reacted with 80 mg of sodium borohydride (NaBH4 ) in mL of deionized water for preparation of sodium hydrogen telluride (NaHTe) solution...
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Báo cáo hóa học: " Preparation and characterization of superhydrophobic surfaces based on hexamethyldisilazane-modified nanoporous alumina" pptx
Ngày tải lên :
21/06/2014, 01:20
... measurements and the analysis of the spectra and carried out the analysis of the water contact angles on nanoporous alumina AK and CE participated in the design of the study and coordination of the ... of HMDS Page of with the alumina surface occurs by the dissociative chemisorption of HMDS via reaction of coordinatively unsaturated Al + and O-sites Subsequent reaction of pendant -O-SiMe3 and ... of the prepared alumina nanoporous and thin film surfaces Chemical modification of alumina surfaces Surface modification of alumina by HMDS was carried out to render the prepared nanoporous and...
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Báo cáo hóa học: " Preparation and properties of copper-oil-based nanofluids" ppt
Ngày tải lên :
21/06/2014, 03:20
... viscosity, thermal conductivity, and thermal oxidation stability of the nanofluids are also investigated Experimental Materials and preparation of ligand All the materials and solvents used in this ... r and ν are the density and kinematic viscosity of the nanofluid, respectively, at the same temperature Measurements of the thermal conductivities of Cu nanofluids were performed by means of ... shown in Figure 2b, the bands of C-H and OCH2 are also observed in the surface-modified Cu nanoparticles, while the absorption peaks of P = S and P-S shifts, and the bands of N-H mostly disappear...
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Báo cáo hóa học: "Preparation and evaluation of novel mixed micelles as nanocarriers for intravenous delivery of propofol" potx
Ngày tải lên :
21/06/2014, 04:20
... HS15/propofol of 10/1/5 by weight, average micelle size of about 101 nm and PDI of 0.12 as shown in Figure The LC of mixed micelles was about 32.4%, and the content of propofol in the preparation ... for propofol, which exhibits rapid sleep and recovery Page of 0.5 of dose administration) following administration of both of propofol formulations (data not shown) The results of recovery of righting ... ratio of propofol to mPEG-PLA and Solutol HS15, which allowed for the best propofol solubilization, a series of propofol-loaded mixed micelles was prepared with different weight ratios of propofol...
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