physical state of water at room temperature
Báo cáo hóa học: " Anodization of nanoporous alumina on impurityinduced hemisphere curved surface of aluminum at room temperature" pptx
... developed hybrid pulse anodization [HPA] method to fabricate thenanoporous alumina on a flat and curved surface of an aluminum [Al] foil at room temperature [RT]. We fabricatethe nanopores to grow ... Mater 2002, 11:1349.doi:10.1186/1556-276X-6-596Cite this article as: Chung et al.: Anodization of nanoporous alumina onimpurity-induced hemisphere curved surface of aluminum at room temperature. ... pulse,while the negative voltage of -2 V was adopted for thenegative pulse. The period of a hybrid pulse was 2 s (1s:1 s). The formation of AAO was performed for 1 h bymeans of the potentiostat (5000,...
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Báo cáo hóa học: " Direct synthesis of ultrafine tetragonal BaTiO3 nanoparticles at room temperature" pptx
... that of bulk BaTiO3materials. It is confirmed that the nanoparticles havetetragonal phase at room temperature. Keywords: BaTiO3, nanoparticle, room temperature IntroductionBarium titanate ... at the rate of 200 rpm; after that, homogenous white slu rryis obtained. The white slurry is air-dried, and BaTiO3nanoparticles are synthesized. All of the procedures arecarried at room temperature. The ... line of 637,488, and 325 nm. The rate of measured temperature rise is15°C/min.Results and discussionA large quantity (23.0 g) of barium titanate nanoparticlesis directly synthesized at room...
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a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature
... electronegativity of the oxy-gen atom than that of the nitrogen atom. The other is that there isa lone electron pair in NH3. What is more important is that low- temperature ammonia oxidation ... from State Key Laboratory of Silicon Materials at Zhejiang University in 2005. His research interest ispreparation and application of nano-sized compound semiconductor materials.Xingfa Ma, Professor, ... Department of Material Science and Engineering at ZhejiangUniversity, and in 1991 PhD degree in the State Key Laboratory of SiliconMaterials at Zhejiang University. Now, he is a Cheung Kong Professor,...
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Báo cáo hóa học: " Catalytic ozone oxidation of benzene at low temperature over MnOx/Al-SBA-16 catalyst" pdf
... cited. catalytic activity of Al-SBA-16-MA15% was higher thanthat of Al-SBA-16-MN15%. It was shown that the type of precurso rs used for Mn impregnation influenced thedispersion, oxidation state, ... at the same temperature. The mixture was then putin an oven at an elevated temperature of 100°C for 24 h.After this hydro thermal ag ing, the s olid pro duct f ormedwas recovered by filtration ... oxidecatalysts. I. characterization: effect of precursor and loading. J Catal 1994,150:94-104.13. Kim SC, Shim WG: Catalytic combustion of VOCs over a series of manganese oxide catalysts. Appl Catal...
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Báo cáo khoa học: Different roles of two c-tubulin isotypes in the cytoskeleton of the Antarctic ciliate Euplotes focardii Remodelling of interaction surfaces may enhance microtubule nucleation at low temperature doc
... includingcell-fate specification, regulation of differentiation, andcontrol of cell proliferation and movement [45].Recently, we have shown that activation of the heat-shock response in the ciliate T. ... that facilitate template nucleation of microtu-bules by the c-tubulin ring complex at cold temperatures.AbbreviationsqPCR, quantitative PCR; RATE, rapid amplification of telomeric ends; TuRC, tubulin ... Euplotes genes [38], from dif-ferent rates of transcription initiation and elongationbetween the two genes, and ⁄ or from variation in therates of degradation of the two messages. To test thefirst...
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Dose dependence of room temperature photoluminescence from Si implanted SiO 2
... theconcentration of optically active defects, however,the decrease at higher doses suggests that either thenature of these defects is altered by subsequentirradiation or that competing relaxation paths214 ... measure-ments were performed at room temperature using PROFILE is a commercially available code for calculatinghigh-dose implant profiles.Fig. 1. Implant profiles calculated using the PROFILE code fora ... dose[4—6]. The interpretation of the emission spectra issomewhat complicated by the fact that ion-im-plantation also produces radiation damage in theSiOand by the fact that the resulting nanocrystalshave...
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la nanotubes sensor for room temperature detection of ammonia
... sur-face and heated at 700◦C for 4 h in open air, resulting in formation of arrays of LSCO nanotubes in the inside of the pores of the AAOtemplate.2.4. CharacterizationThe morphologies of the LSCO ... system at a volume ratio of HCONH2/H2O =1:3) in order to avoid cracking during heating.The concentration of solution was diluted to 0.3 M Co.2.3. LSCO nanotubes preparationThe alumina template ... professor in Department of Physics of Wuhan University. His current fields of interest are nanomaterialsXing-Zhong Zhao received his PhD in physics at University of Science andTechnology of...
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room temperature ammonia sensing properties of w18o49 nanowires
... ability at room temperature that areunattainable for conventional materials [10–13]. At present, inves-tigations on single nanowire sensor are rather rare because of the challenge in manipulation, ... emission peak at 423 nm (2.94 eV) attributedto large amounts of oxygen vacancies that are often implicit in thepreparation of oxide semiconductors.The room temperature electrical response of the ... theNH3flow was cut off, the electrical current recovered and increasedquickly. Heat treatment at elevate temperatures usually is used tostabilize the current. However, heat treatment at 400◦C and...
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synthesis, growth mechanism and room-temperature blue luminescence emission of uniform wo3 nanosheets with w as starting material
... 2Dnanosheets.The formation process of WO3nanosheets from W can bedivided into three parts: the formation of precursor, the formation of WO3by decomposition of WO3Á H2O and growth of WO3crystalnucleus. ... lamp as the excitation source at room temperature. Fig. 3 shows the excitation and emission spectrum.When the excitation wavelength is 315 nm (Fig. 3a), the emissionpeaks of the as-synthesized ... oxidation of W using hydrogenperoxide (H2O2) [35,36]. In a typical synthesis, 6.5 g of W powderwas dissolved into a mixed solution of 40.0 mL of H2O2and 4.0 mL of H2O with an ice-water...
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thermal treatment effects on the material and gas-sensing properties of room-temperaturetungstenoxidenanorodsensors
... systems operated at ambient temperature [13–15]. It might be attributed to the low opera-tion temperature leading to slow desorption rate of pre-adsorbe dmoieties. As an annealing temperature increases ... of the two oxidation states. Fully oxidized WO3is the moststable tungsten oxide compound so that the W6+ state may bemore inert to the sensing-related surface reactions than the W5+ state. ... of careful control of the relative population ratio between W5+andW6+states.The sensing characteristics become suddenly worse as the N2annealing temperature increases beyond 600◦C at...
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Báo cáo khoa học: Variants of b2-microglobulin cleaved at lysine-58 retain the main conformational features of the native protein but are more conformationally heterogeneous and unstable at physiological temperature potx
... exclusionchromatography of dK58-b2m incubated at 310 K [10].The NMR data clearly indicate that the overall fold-ing pattern of the cleaved b2m variants is very similarto that of the wt protein. ... closesimilarity of the patterns is readily appreciated. Theexcellent resolution of the resonances in Fig. 10 couldnot be exploited for quantitation of the relative con-centrations of the two forms ... the expected pattern of the I2interme-diate that was unambiguously recognized in previousstudies of other b2m variants [21,22]. The best estimate of the equilibrium populations of the fully...
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Báo cáo khoa học: ATPase activity of RecD is essential for growth of the Antarctic Pseudomonas syringae Lz4W at low temperature potx
... rate of ATP hydrolysis) for the reactions werecalculated. Km(ATP)was determined at a saturating concen-tration (1 lm) of ssDNA, and Km(DNA)was calculated at asaturating concentration of ... (Graphpad Software, San Diego, CA,USA). In each case, Vmax(maximal rate of ATP hydroly-sis), Km(ATP)(ATP concentration at the half-maximal rate of reaction) and Km(DNA)(DNA concentration at the ... significance of the RecD-associated ATPase activity required during the growth of P. syringae at low temperature (4 °C). The very low(but non-zero) ATPase activity of RecD (approxi-mately 8–10% of the...
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hydrothermal properties of materials experimental data on aqueous phase equilibria and solution properties at elevated temperatures and pressures
... composition of phases at high temperatures also; Isopiest – the method of isopiestic measurements is used for determination of the isopiestic molality (molality at a known activity of water in ... method of weight-loss of crystalls is used for measurements of solid solubility; Vis.obs. – the method of visual observations is used for determination of phase equilibria at elevated temperatures ... the numerator indicates the number of units of solute and the denominator shows the number of units (usually one unit) of solution (or of solvent, if it is indicated). A designation of the units...
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MARCH 2009 FLORIDA COMMUNITY COLLEGE AT JACKSONVILLE A COMPONENT UNIT OF THE STATE OF FLORIDA NOTES pptx
... Federal Government, the State, or any other State or territory of the United States, that has a branch or principal place of business in this State, or by a national association organized and ... State Board of Education for the benefit of the College. The College’s investments consist of United States Treasury securities, with maturity dates of six months or less, and are reported at ... assets are capitalized and recorded at cost at the date of acquisition or at estimated fair value at the date received in the case of gifts and purchases of State surplus property. Additions, improvements,...
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Báo cáo hóa học: " Structural and physical properties of antibacterial Ag-doped nano-hydroxyapatite synthesized at 100°C" pptx
... by setting the atomic ratio of Ag/[Ag + Ca] at 20% and [Ca + Ag]/P as 1.67. The X-ray diffractionstudies demonstrate that powders made by co-precipitation at 100°C exhibit the apatite characteristics ... sample. The chang es are attributed tothe substitution of Ag+from Ca2+into the lattice of apatite.Bands’ characteristics of the phosphate and hydrogenphosphate groups in apatitic environment ... hydroxyapatite doped with Ag at 100°C. Preparation of Ag-doped hydroxyapatite by co-precipitation method at 100°C has several advantagesover other techniques. Specifically, it can generate highlycrystalline...
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Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam xác định các mục tiêu của chương trình khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 sự cần thiết phải đầu tư xây dựng nhà máy thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose