synthesis and modification of submicron barium titanate powders

... of 80 Pa, RF power of (1) 100 and (2) 400 W Figure 3.2 AFM images of (a) pp-PFH and (b) pp-HFB films deposited at RF power of 400 W and different pressures of (1) 27, (2) 80, and (3) 107 Pa Figure ... images of (a) solid pp-HDHF particles polymerized under an input RF power of 200 W, system pressure of 40 Pa and glow discharge time of 45 s, and the solid particles after (b) s and (c) 22 s of Ar ... (before 150 s) and addition of liquid toluene (at 150 s), while ( ) and ( ) stand for addition of liquid N2 or acetone, and addition of distilled water then acetone, respectively XV LIST OF TABLES...

Ngày tải lên: 14/09/2015, 08:27

... information of NSSFS and RNSESFS (a) and (b) AFM image of NSSFS and RNSESFS, respectively Scale bar, 400 nm The crystallinity is ~40% for both NSSFS and RNSESFS, while the content of β-conformations of ... control and twisted fibers (350 π and 500 π) of silkworm silk (b) SEM images of the control and twisted fibers (600 π and 1000 π) of spider silk 104 Fig 6.3 General stress-strain profiles ... force of β-strand is ~138 pN, and the yielding strength of B mori silk is 179 MPa (e) The BSFR of RNSESFS ((XYZ) n, n ≥ 1) are comprised of all the possible combinations of residue G, A and S The...

Ngày tải lên: 30/09/2015, 05:58

... potential, and addition of a TPP-moiety has been used to drive the selective uptake of a wide variety of Ó FEBS 2003 Fig Selective uptake of mitoDC-81 by mitochondria and subsequent alkylation of mtDNA ... mitochondria and cells In addition to facilitating the development of antigenomic therapies, such a reagent might also be useful in investigating the rate of turnover of mtDNA and in the derivation of ... the vicinity of mtDNA with the resultant binding and selective alkylation leading to a depletion of mtDNA in intact cells (Fig 1) Here we report the synthesis and characterization of a novel mitochondria-targeted...

Ngày tải lên: 20/02/2014, 11:20

... chloroform and upper aqueous phases In the absence of CMP and in both +PIS and –PIS strains, a release of label in the aqueous phase was observed after incubation To calculate the liberation of ... concentrations of manganese chloride and varying amounts of EDTA appear on the y axis just above a maximum activity of 2.0 nmol PtdInsÆmg)1Æmin)1 between 2.5 and mM EDTA At 10 mM, synthesis decreased ... the same plot of the values found for de novo synthesis in the presence of 7.5 or 2.5 mM MnCl2 with various amounts of EDTA, or in the presence of MnCl2 only [11], as a function of the concentration...

Ngày tải lên: 22/02/2014, 04:20

... activity of RP mRNA for adjustment of the biosynthesis of ribosomes to the requirements of cell growth and differentiation In addition, a relevant contribution of protein turnover to the regulation of ... ribosome pathologies have had in our understanding of regulatory mechanisms of RP synthesis Translational regulation of RP synthesis Sequence comparison of some vertebrate RP genes cloned in the ... mechanism of DBA in cultured cells showed that alteration of any of the involved RPs can affect the maturation of rRNA [72] Moreover, investigations on the effect of mutations on the synthesis of RPS19...

Ngày tải lên: 07/03/2014, 01:20

... parameters and transport characteristics of Bip-[3H]Pro Results and Discussion Synthesis, chemical characterization and stability of Bip-Pro Figure shows the structure (Fig 1A) and the synthesis ... cells and 10 and 100 lm in SKPT cells) in the presence of increasing concentrations of Bip-Pro (0– 100 lm and 0–50 lm, respectively) The results are Fig Interaction of Bip-Pro with PEPT1 and PEPT2 ... concentrations and at increasing Bip-Pro concentrations The diffusional component of [14C]Gly-Sar uptake, of 8% in Caco-2 cells and of 4% in SKPT cells, measured in the presence of excess of Gly-Sar...

Ngày tải lên: 07/03/2014, 05:20

... in both dispersed and heterogeneous forms (supported) tsnl Advantanges of this Approach•The light absorption and energy levels of the semiconductor valence and conduction bands can be adjusted ... photostability and low toxicity can be selected (e.g MoS2) •Our synthesis allows easy chemical modification of the nanocluster surface properties (e.g deposition of a metal) •Small size of nanocluster ... Treatment of large volumes of highly diluted toxins 3) Cost of treatment tsnl Possible Treatment ApproachesStep 1: Excavation, Soil Washing Conventional Treatment Options: 1)Filtration and/ or Adsorption...

Ngày tải lên: 14/03/2014, 20:20

... morphological property of SiNWs, a FE-SEM observation was carried out after synthesis of SiNWs Fig 1(b) shows the topview (15° tilted) and cross-section (see inset of Fig 1(b)) FE-SEM images of the SiNWs ... at λ b 700 nm [20] The difference of the reflectance might be the effect of synthesis conditions, such as thickness of metal film and SiH4 gas flow The reduction of reflectance is very helpful to ... Therefore, further reduction of the reflectance will be expected from the optimization of the synthesis conditions of SiNWs For analysis of the electrical properties, the I–V curve of the fabricated SiNWs...

Ngày tải lên: 16/03/2014, 15:12

... investigation of the termination of the nanowire lateral sides and apex Electron diffraction (ED) and analysis of zero-order and higher-order Laue-zones allows precise determination of unit cell and space ... nanowire, (d) STEM-HAADF image of a nanowire, and (e) linescan of the HAADF signal (solid line) and numerical fit of the shape of the nanowire (dashed line) As both composition and phase can be considered ... effect is fast (time scale order of seconds) and fully reversible The amplitude of quenching achieves its maximum at room temperature and the influence of humidity and other reducing gases is negligible...

Ngày tải lên: 16/03/2014, 15:25

... sidechains of Glu332 of each rat Kv1.2 a-subunit (Kv1.2 channel is composed of four a-subunits) and Arg10, Arg19, Lys30 and Lys33 of Pi4 The Lys26 sidechain of Pi4 enters into the ion channel pore and ... binding of [125I]apamin without any other ligand, and B is the binding in the presence of the indicated concentrations of competitor Abscissa axis is the logarithm of the molar concentration of competitor ... atoms of the P-domain selectivity filter Residue Tyr35 of Pi4 is involved in a hydrophobic cluster of aromatic residues consisting of Trp344, from one of the four Kv1.2 a-subunits, and Trp345 and...

Ngày tải lên: 17/03/2014, 10:20

... and functional characterization of these genes, opgGIH, necessary for OPG backbone synthesis and of a new gene, opgC, necessary for OPG succinylation MATERIALS AND METHODS Bacterial strains and ... demonstration of acetyl substitution of the OPGs [13] The transposon insertion was located just downstream of a series of genes similar to the E coli mdoGH operon that govern the synthesis of OPGs ... The extracts were concentrated by rotary evaporation, and lipids and proteins were then removed by the addition of a mixture of chloroform and methanol (2 : 1) The aqueous phase, containing OPGs,...

Ngày tải lên: 17/03/2014, 17:20

... reaction of bulky rutile powders and 10 M NaOH solution without using any templates and catalysts The inner and outer diameters of the nanotubes were approximately and nm, respectively The amount of ... the inner of the nanotubes, forming an interesting composite structure that possesses both the surface properties of rutile nanocrystals and most morphology and mechanical properties of titanate ... To the best of our knowledge, this is the first time to observe this novel morphological structure of the nanocomposites of rutile nanocrystals and titanate nanotubes Fig XRD patterns of the starting...

Ngày tải lên: 19/03/2014, 16:48

... / Journal of Alloys and Compounds 433 (2007) 216–220 Fig (A) TEM image of the sample produced at 140 ◦ C for h (B) TEM image of the sample produced at 140 ◦ C for h The insets of (A and B) show ... phase of hematite ␣-Fe2 O3 and exhibits that each porous fusiform ␣-Fe2 O3 nanocrystalline was a single crystal Fig 5A and B shows scanning electron microscope images of a typical sample of fusiform ... stainless steel autoclave of 50 mL capacity Finally, the autoclave was filled with distilled water up to 75% of the total volume, sealed and maintained at 140 ◦ C for 4, 8, 12, and 24 h, respectively...

Ngày tải lên: 19/03/2014, 16:48

... control over the shapes of nanowire bundles and nanorods, allowing the formation of urchin-like crystalline h-WO3 via simple substitution of NH4 + in place of Na+ ions of EDTA salt solutions Experimental ... growth of aggregate particles is facilitated and followed by the growth of 1D nanorods to form the urchin-like structure TEM and HR-TEM micrographs of h-WO3 nanostructures formed using Na+ ion- and ... voltammograms of (a) h-WO3 nanowire bundles, and inset Figure, CV curves of urchin-like, were measured in 0.1 M H2 SO4 at a scan rate of 100 mV/s for 10 cycles and (b) CV curves of h-WO3 urchin-like...

Ngày tải lên: 19/03/2014, 16:48

... intensity of the second and ®fth lines of the spectra, in the case of oxides This behaviour can be explained by the preferential orientation of the platelike particles, parallel to the surface of the ... enhancement of the M lines can be a measure of the orientation of the particles at the surface of the green body To illustrate, Fig shows (a) the transmission and (b) CEMS spectrum of the platelike ... Hydrothermal synthesis of ultra®ne Fe2O3 and Fe3O4 powders, Mat Res Bull 33 (1998) 841 [7] D Barb, L Diamandescu, D Mihaila-Tarabasanu, A Rusi, Romanian Patent Osim 86 979, 18 December 1984 [8] L Diamandescu,...

Ngày tải lên: 19/03/2014, 16:48

... temperature of 160 8C and with growth time of h Fig TEM images of TiO2 nanorods grown on PT-substrate at an annealing temperature of 700 8C and at a hydrothermal growth temperature of 160 8C and with ... FE-SEM images of TNAs grown on PT-substrate at an annealing temperature of 700 8C and at a hydrothermal growth temperature of 160 8C and growth time of h (a) PT-substrate; (b) top view of TNAs; (c) ... distribution of TiO2 nanorods grown on PT-substrate at an annealing temperature of 700 8C and at a hydrothermal growth temperature of 160 8C and with growth time of h Fig SEM image of TiO2 nanorod...

Ngày tải lên: 19/03/2014, 16:48

... PL bands to self-trapped excitons localized on TiO6 octahedra Serpone et al [18] reported the PL bands of anatase TiO2 nanocrystals at the long 303 wavelength range (465 and 520 nm band) and ... band centered at 485 nm The broad PL band was ascribed to bound-exciton emission due to the trapping of free excitons by titanate groups near defects Saraf et al [17] also observed PL peak of ... nanowires (A and B represent anatase and brookite, respectively) can also be found, it is much lower than those of anatase phase No characteristic peaks of other impurities, such as NaCl and Na2 TiO3...

Ngày tải lên: 19/03/2014, 16:48

... Science Foundation of China (NO 60574095), the Knowledge Innovation Program of the Chinese Academy of Science (kjcxz-sw-h12-02, 0723A11125) and the chief foundation of Hefei Institutes of Physical Science, ... profile of the nanowires show that the diameters of the nanowires obtained at h and h are 2–3 nm and 3–4 nm, respectively Combined with the UV–vis spectra, it is suggested that increase of the ... Figs and 4) and, importantly, the good agreement between the present results and the previous report [30] 3.2 Gas sensing performance of the DNA-templated silver nanowires 3.2.1 Effect of NH3...

Ngày tải lên: 20/03/2014, 13:08

... grain size of 10% Fe3+ - Fig XRD patterns of Fe3+ -doped SnO2 nanoparticles: (a) SGC series and (b) SGH series pound Because of the interference of Fe3+ with SnO2 lattice, the crystallinity of the ... 259.8 L.M Fang et al / Journal of Alloys and Compounds 454 (2008) 261–267 265 Fig Bright field TEM and HRTEM micrographs of samples: (a) SGH1, (b) SGH5, and (c and d) SGH15 SnO2 nanoparticles ... HRTEM micrographs of SGC15 266 L.M Fang et al / Journal of Alloys and Compounds 454 (2008) 261–267 Fig FT-IR transmission spectra of samples: (a) SGC series and (b) SGH series range of 1059 cm−1...

Ngày tải lên: 20/03/2014, 13:08

... positions of the main IR bands which are associated with the structure of the Fig FESEM images of wt% PPy/MWCNT composites synthesized with weight ratio of PSS/pyrrole monomer of (c) 0.1, (d) 0.3 and ... conductivities and these results may be due to the decrease in the thickness of PPy with the presence of high content of PSS In order to understand the role of PSS during the formation of PPy/MWCNT ... spectroscopy of wt% PPy/MWCNT composites synthesized with weight ratio of PSS/pyrrole monomer of (b) 0.1, (c) 0.3 and (d) 0.5 For comparison, the Raman spectroscopy of (a) primary PPy/MWCNT composites and...

Ngày tải lên: 20/03/2014, 13:08