Báo cáo hóa học: "Preparation and Characteraction of New Magnetic Co–Al HTLc/Fe3O4 Solid Base" pptx

... value of saturation magnetization decreased from 15.6 to 0.98 emu/g with the decrease of Fe/Co ratios because of the change of particle size of the magnetic Co–Al HTLcs. Conclusions In summary, magnetic ... (emu/g) H (oe) Fig. 5 Magnetic hysteresis curve of magnetic Co–Al HTLcs (Fe/Co = 0.2) measured at room temperature Table 3 Magnetic property of magnetic Co–A...

Ngày tải lên: 22/06/2014, 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 ... reaction of HMDS with the alumina surface occurs by the dissociative che- misorption of HMDS via reaction of coordinatively unsaturated Al + and O-sites. Subsequent rea...

Ngày tải lên: 21/06/2014, 01:20

... in Figure 2b, the bands of C-H and O- CH 2 are also observed in the surface-modified Cu nano- particles, while the absorption peaks of P = S and P-S shifts, and the bands of N-H mostly disappear. Figure ... additives in oils. Viscosities and thermal conductivities of nanofluids The effects of both temperature and mass fraction of the nanoparticles on the viscosities of...

Ngày tải lên: 21/06/2014, 03:20

... mPEG- PLA/Solutol HS15/propofol of 10/1/5 by weight, average micelle size of about 101 nm and PDI of 0.12 as shown in Figure 2. The LC of mixed micelles was about 32.4%, and the content of propofol in the preparation ... of propofol to mPEG-PLA and Solutol HS15, which allowed for the best propofol solubili- zation, a series of propofol-loaded mixed micelles was pre- pared...

Ngày tải lên: 21/06/2014, 04:20

... manufacturing of carbon/water nanofluids. Introduction As industrial and technological products demand higher standards of function and capacity, the problem of heat dissipation from electrical ... viscos- ity of c arbon/wat er nanofluid is much higher than that of the water. When the carbon/wat er nanofluid was applied to heat exchange, pressure drop of pipeline and energy...

Ngày tải lên: 21/06/2014, 04:20

... the a rrangement of cations produces pairs of Figure 5 N 2 adsorption and desorption isotherms of Fe 3 O 4 NPs. Figure 6 Magnetic hysteresis loops of a-Fe 2 O 3 NPs (curve 1) and Fe 3 O 4 NPs ... thus  = M V ,andM = A s · S,wherer is the density of the sample; M, S and V are the mass, surface area and volume of one Fe 3 O 4 particle, respectively; A s is the BET surface...

Ngày tải lên: 21/06/2014, 06:20

... solutions and then dried in vacuum. Synthesis of Fe 3 O 4 Nanoparticles Fe 3 O 4 nanoparticles were synthesized as reported by Massart et al. [28]. A mixture of 5.406 g of FeCl 3 Á6H 2 O and 2.780 g of ... maximum (FWHM) of the dif- fraction line, and h was the diffraction angle. Based on the FWHM of (3 1 1) Fe 3 O 4 and (111) zinc blende reflection, the averaged crystallit...

Ngày tải lên: 21/06/2014, 20:20

... (&) Á L. Deng Á G. Chen Key Laboratory of Biorheological Science and Technology, Ministry of Education, and Institute of Biochemistry and Biophysics, College of Bioengineering, Chongqing University, 400044 ... different surfaces, and the thick- ness of the MHA film and the protein monolayer was estimated to be 1.51 and 5.53 nm, respectively. The GI- XRD 2h degrees of...

Ngày tải lên: 22/06/2014, 00:20

... photomicrographs of fresh and modified fly ash. (A and B) SEM of fresh fly ash at 1,000 and 2,500 times magnification, (C and D) SEM of ball milled fly ash for 20 h at 1,000 and 3,000 times magnification, (E and ... SEM of ball milled fly ash for 40 h at 1,000 and 3,000 times magnification, (G and H) SEM of ball milled fly ash for 60 h at 1,000 and 3,000 times magnification...

Ngày tải lên: 22/06/2014, 18:20

... during a period of time is a candidate for a landmark. A tag that has rarely been used during a long period of time is also a candidate for a landmark. 6 Further study on summaries and landmarks is ... attributes. Parts of them have the latitudes and longitudes of locations. Other logs have attributes of places in a schedule and on a calendar. They are assigned by the name of...

Ngày tải lên: 21/06/2014, 17:20