physical state of water at room temperature

... developed hybrid pulse anodization [HPA] method to fabricate the nanoporous alumina on a flat and curved surface of an aluminum [Al] foil at room temperature [RT]. We fabricate the nanopores to grow ... Mater 2002, 11:1349. doi:10.1186/1556-276X-6-596 Cite this article as: Chung et al.: Anodization of nanoporous alumina on impurity-induced hemisphere curved surface of aluminum at room temperature. ... pulse, while the negative voltage of -2 V was adopted for the negative pulse. The period of a hybrid pulse was 2 s (1 s:1 s). The formation of AAO was performed for 1 h by means of the potentiostat (5000,...

Ngày tải lên: 20/06/2014, 22:20

... that of bulk BaTiO 3 materials. It is confirmed that the nanoparticles have tetragonal phase at room temperature. Keywords: BaTiO 3 , nanoparticle, room temperature Introduction Barium titanate ... at the rate of 200 rpm; after that, homogenous white slu rry is obtained. The white slurry is air-dried, and BaTiO 3 nanoparticles are synthesized. All of the procedures are carried at room temperature. The ... line of 637, 488, and 325 nm. The rate of measured temperature rise is 15°C/min. Results and discussion A large quantity (23.0 g) of barium titanate nanoparticles is directly synthesized at room...

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 04:20

... electronegativity of the oxy- gen atom than that of the nitrogen atom. The other is that there is a lone electron pair in NH 3 . 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 is preparation and application of nano-sized compound semiconductor materials. Xingfa Ma, Professor, ... Department of Material Science and Engineering at Zhejiang University, and in 1991 PhD degree in the State Key Laboratory of Silicon Materials at Zhejiang University. Now, he is a Cheung Kong Professor,...

Ngày tải lên: 19/03/2014, 16:47

... cited. catalytic activity of Al-SBA-16-MA15% was higher than that of Al-SBA-16-MN15%. It was shown that the type of precurso rs used for Mn impregnation influenced the dispersion, oxidation state, ... at the same temperature. The mixture was then put in an oven at an elevated temperature of 100°C for 24 h. After this hydro thermal ag ing, the s olid pro duct f ormed was recovered by filtration ... oxide catalysts. 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...

Ngày tải lên: 20/06/2014, 23:20

Ngày tải lên: 05/09/2013, 16:11

... including cell-fate specification, regulation of differentiation, and control 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. Abbreviations qPCR, quantitative PCR; RATE, rapid amplification of telomeric ends; TuRC, tubulin ... Euplotes genes [38], from dif- ferent rates of transcription initiation and elongation between the two genes, and ⁄ or from variation in the rates of degradation of the two messages. To test the first...

Ngày tải lên: 07/03/2014, 04:20

... the concentration of optically active defects, however, the decrease at higher doses suggests that either the nature of these defects is altered by subsequent irradiation or that competing relaxation paths 214 ... measure- ments were performed at room temperature using  PROFILE is a commercially available code for calculating high-dose implant profiles. Fig. 1. Implant profiles calculated using the PROFILE code for a ... dose [4—6]. The interpretation of the emission spectra is somewhat complicated by the fact that ion-im- plantation also produces radiation damage in the SiO  and by the fact that the resulting nanocrystals have...

Ngày tải lên: 16/03/2014, 15:26

... 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 AAO template. 2.4. Characterization The morphologies of the LSCO ... system at a volume ratio of HCONH 2 /H 2 O =1:3) in order to avoid cracking during heating. The concentration of solution was diluted to 0.3 M Co. 2.3. LSCO nanotubes preparation The alumina template ... professor in Department of Physics of Wuhan University. His current fields of interest are nanomaterials Xing-Zhong Zhao received his PhD in physics at University of Science and Technology of...

Ngày tải lên: 20/03/2014, 13:04

... ability at room temperature that are unattainable 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) attributed to large amounts of oxygen vacancies that are often implicit in the preparation of oxide semiconductors. The room temperature electrical response of the ... the NH 3 flow was cut off, the electrical current recovered and increased quickly. Heat treatment at elevate temperatures usually is used to stabilize the current. However, heat treatment at 400 ◦ C and...

Ngày tải lên: 20/03/2014, 13:07

... 2D nanosheets. The formation process of WO 3 nanosheets from W can be divided into three parts: the formation of precursor, the formation of WO 3 by decomposition of WO 3 Á H 2 O and growth of WO 3 crystal nucleus. ... 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 emission peaks of the as-synthesized ... oxidation of W using hydrogen peroxide (H 2 O 2 ) [35,36]. In a typical synthesis, 6.5 g of W powder was dissolved into a mixed solution of 40.0 mL of H 2 O 2 and 4.0 mL of H 2 O with an ice-water...

Ngày tải lên: 20/03/2014, 13:08

... 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 d moieties. As an annealing temperature increases ... of the two oxidation states. Fully oxidized WO 3 is the most stable tungsten oxide compound so that the W 6+ state may be more inert to the sensing-related surface reactions than the W 5+ state. ... of careful control of the relative population ratio between W 5+ and W 6+ states. The sensing characteristics become suddenly worse as the N 2 annealing temperature increases beyond 600 ◦ C at...

Ngày tải lên: 20/03/2014, 13:11

... exclusion chromatography 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 similar to that of the wt protein. ... close similarity of the patterns is readily appreciated. The excellent resolution of the resonances in Fig. 10 could not be exploited for quantitation of the relative con- centrations of the two forms ... the expected pattern of the I 2 interme- diate that was unambiguously recognized in previous studies of other b2m variants [21,22]. The best estimate of the equilibrium populations of the fully...

Ngày tải lên: 23/03/2014, 11:20

... rate of ATP hydrolysis) for the reactions were calculated. K m(ATP) was determined at a saturating concen- tration (1 lm) of ssDNA, and K m(DNA) was calculated at a saturating concentration of ... (Graphpad Software, San Diego, CA, USA). In each case, V max (maximal rate of ATP hydroly- sis), K m(ATP) (ATP concentration at the half-maximal rate of reaction) and K m(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...

Ngày tải lên: 30/03/2014, 04:20

... 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 indic ated). A designation of the units...

Ngày tải lên: 01/04/2014, 11:22

... 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,...

Ngày tải lên: 19/06/2014, 12:20

... by setting the atomic ratio of Ag/[Ag + Ca] at 20% and [Ca + Ag]/P as 1.67. The X-ray diffraction studies demonstrate that powders made by co-precipitation at 100°C exhibit the apatite characteristics ... sample. The chang es are attributed to the substitution of Ag + from Ca 2+ into the lattice of apatite. Bands’ characteristics of the phosphate and hydrogen phosphate 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 advantages over other techniques. Specifically, it can generate highly crystalline...

Ngày tải lên: 20/06/2014, 23:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 03:20

Ngày tải lên: 21/06/2014, 06:20