properties of water at 15 degrees celsius

... diameter of these materials. Capilary condensation of SBA -15 begins at P/P o =0.6 higher than 1%Pt/SBA -15 (P/P o =0.5) and the wide of hysteresis loop of SBA -15 larger than PS-1 show that after ... 6nm in the channels of SBA -15 and at this state, Pt/SBA -15 catalyst showed the highest activity and selectivity in the oxidation of glucose. When increasing the content of Pt loading, most ... nanoparticles aggregated outside the channels of SBA -15 with size of 10-15nm and catalytic activities of these materials decreased. pH value also affects directly on the selectivity of gluconic acid...

Ngày tải lên: 05/03/2014, 11:21

... ke atas sifat-sifat mekanikal, sifat-sifat morfologi, dan penyerapan air telah dikaji. Dua jenis serat digunakan iaitu serat yang dirawat dan serat yang tidak dirawat, di mana sebahagian serat ... and water absorbent properties of the treated and untreated fiber composites are studied. 2. EXPERIMENTAL 2.1 Materials Water hyacinth fibers (WHF) were obtained from fresh water ... cellulose obtained from water hyacinth (E. crassiper) has been used. Water hyacinth is an aquatic plant that can live and reproduce while freely floating on the surface of fresh water or while being...

Ngày tải lên: 07/08/2014, 14:20

Ngày tải lên: 05/09/2013, 16:11

... Society of BioRegulatory Medicine (ASBRM) is a scientific society formed to support education in bioreg- ulatory medicine. We believe that a new model of health- care information and education ... exhibi- tions as part of a world-wide calendar of events in integrative and bioregulatory medicine ✔ Inclusion on a publically available, international, practitioner finder list ✔ Educational seminars ... of medical associations promoting a broad range of integrative medicine ✔ Discussion forums addressing therapeutic questions and case management ✔ Regular newsletters ✔ Calendar publication of...

Ngày tải lên: 21/02/2014, 17:20

... occur to generate the active intermediate for the coupled hydroxylation of the cosubstrates [21,41]. However, the sequence of binding of cofactor and substrate is still a matter of discussion ... a concentration of L-Phe at half-maximum saturation ([S] 0.5 )of9 8±7l M (Fig. 2A,B). Saturation was reached at approximately 2 m M with a DRU-value of 75 RU/(pmol subunitặmm )2 ). Simultaneous injection of ... effects of the biopterin cofactor on the rate of phosphorylation of Ser16, the limited proteolysis by trypsin and the substrate induced conformational transition (hys- teresis) related to catalytic...

Ngày tải lên: 17/03/2014, 09:20

... printing, was fabricated successfully. The use of rutile TiO 2 as the sensing film material enabled the heat treatment to be performed at high temperature, which facilitated the fabrication of a sensitive ... sensitivity of the sensor is dominated by the number of adsorbed oxygen ions at the sensor surface. Because oxi- Fig. 4. XRD patterns – (1 1 0) peak of undoped TiO 2 , 11 wt.% WO 3 doped TiO 2 and 15 ... sensing properties. Also, we assumed that the high heat treatment temperature of the sensor induced an electrical interaction between WO 3 and TiO 2 , which in turn affected the electrical properties...

Ngày tải lên: 19/03/2014, 16:48

... Journal of Science, Mathematics - Physics 25 (2009) 193-197 194 been demonstrated [6]. The IEM transition is closely related to the large positive curvature of the density of state (DOS) at the ... compounds have negative thermopower, indicating the n-type nature of these materials. At room temperature, the thermopower of all the compounds is = - 5.5 àV/K. A growth of the peak is found ... Journal of Science, Mathematics - Physics 25 (2009) 193-197 195 Table 1. The thermoelectric properties of La(Fe 1-x Si x ) 13 compounds and other thermoelectric materials at room temperature...

Ngày tải lên: 28/03/2014, 13:20

... 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 ... 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 ... 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...

Ngày tải lên: 01/04/2014, 11:22

... it matters a great deal what kind of water we drink or use for cooking. Every laundry knows that aqua destillata (distilled water) and rainwater, for example, have markedly different properties ... contaminants. In terms of its mineral, salt and trace-element content, river -water would generally be far richer than tank -water (rainwater). As for the immature and mature water discussed at the beginning, ... terms of impeding natural water circulation and water suffocation. Due to their rectangular shape and/or right-angled corners, certain stagnant zones are created, con- ducive to the formation of...

Ngày tải lên: 04/06/2014, 12:43

... 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 ... and ther efore optimization of the Ag concentration in the coating is critical to * Correspondence: dpredoi@gmail.com 1 National Institute of Materials Physics, 105 bis Atomistilor, P.O. Box...

Ngày tải lên: 20/06/2014, 23:20

... in air at room temperature. Finally, ZnO/SBA -15 nanocomposite was obtained by calcining the dried (paste- like) product at 500 °C for 4 h at a heating rate of 1 °C/min in air. The ZnO/SBA -15 nanocomposites ... the micropores of zeolite [14]. The EDS analysis was carried out on the 15 wt% ZnO/ SBA -15 nanocomposite with the EDS attachment on the TEM. Figure 6 illustrates the EDS pattern of the 15 wt% ZnO/SBA -15 ... channels of SBA -15 during calcination. Figure 2 shows the low-angle XRD patterns of the extracted mesoporous silica SBA -15 and the ZnO/SBA -15 nanocomposite. The low-angle XRD pattern of the extrac- ted...

Ngày tải lên: 22/06/2014, 00:20

Ngày tải lên: 08/08/2014, 14:21

Ngày tải lên: 09/08/2014, 08:23

Ngày tải lên: 11/08/2014, 10:22

Ngày tải lên: 11/08/2014, 10:22

Ngày tải lên: 11/08/2014, 15:20

Ngày tải lên: 11/08/2014, 15:20

Ngày tải lên: 12/08/2014, 05:20

Ngày tải lên: 14/11/2014, 10:02

Ngày tải lên: 24/06/2015, 08:16