Báo cáo vật lý: "EFFECTS OF Si, Al2O3 AND SiC SUBSTRATES ON THE CHARACTERISTICS OF DBRS STRUCTURE FOR GaN BASED LASER" ppsx

... of Physical Science, Vol. 17(2), 151–159, 2006 151 EFFECTS OF Si, Al 2 O 3 AND SiC SUBSTRATES ON THE CHARACTERISTICS OF DBRS STRUCTURE FOR GaN BASED LASER N.M. Ahmed*, M.R. Hashim and ... number of layers. However, MOVPE process parameters for the GaN on alternative substrates need further optimization to reach the quality of GaN laye...

Ngày tải lên: 07/08/2014, 14:20

... mouths were opened on the top of the layer, while the tubes were closed by the presence of a layer of titania on the bottom of the structure. Here in, we discuss the influence of different electrolyte ... nanotubes are of interest due to their one- dimensional (1D) nature, ease of handling and simple preparation. Not only can the band gap of the mat...

Ngày tải lên: 07/08/2014, 14:20

... either alone or the absence of both. Therefore, the avoidance of this negative effe ct should allow more optimal conditions to be developed for in vitro production. ＊ Corresponding author: Byeong-chun ... carboxylase and thus plays a key role in the control of fatty acid synthesis, which stimulates blastocyst formation and the growth of rabbit embryos [7]. A recent stud...

Ngày tải lên: 07/08/2014, 17:22

... status on the forest floor. This is part of a cooperative programme on the determinism of the natur- al regeneration of the tropical rainforest. 2. MATERIALS AND METHODS 2.1. Site location, seed ... to describe the kinetic of leaf production and shoot growth. At the end of the experiment (350 days), the seedlings were harvested and the following operatio...

Ngày tải lên: 08/08/2014, 14:22

... affect the association of the substrate with the enzyme in any one of several ways, e.g. through solvation effects on substrates or enzyme active sites and through their effects on the thermodynamic ... little or no effect on the solvation properties of the substrate and the enzyme active sites or on their thermodynamic activities. Another explanation for t...

Ngày tải lên: 07/03/2014, 00:20

... not form any hydrogen bond with the protein atoms. The former propionate displays the conserved conformation in the structures of the Phe35fiTyr mutant and of the wild-type protein as well as other ... chain conformation of this residue. The shift of the Ca atom of Tyr35 of the Phe35fiTyr mutant from that of Phe35 of the wild-type cyt b 5 is 0.21 A ˚ , with...

Ngày tải lên: 08/03/2014, 10:20

... suggest that the stabilization of CD38 homodimers by crosslinkers depends strongly on the conformation and orientation between the CD38 monomers. It has been reported that NP-40 and Triton X-100 stabilize ... these data suggest that these domains are not obligate for the stabilization of the dimers, but rather must contribute to the overall stability of the dimers....

Ngày tải lên: 23/03/2014, 12:20

... Saponite 58 consequently, mesopores prevailed in the pore structure of the systems. In correlation with the XRD pattern data, the possibilities for this condition are the destruction of the ... This is confirmed by the adsorption-desorption isotherm profiles and the pore distribution graphs in Figures 3 and 4, respectively. Although the relationship betwe...

Ngày tải lên: 07/08/2014, 14:20

... Figure 3: (continued) The reinforcement clustering depends on the reinforcement concentration. The effect of reinforcement clustering on the composite is a decrease in the bulk density and an ... the distribution of reinforcement is quite homogeneous. A uniform distribution of reinforcement becomes impossible when the content of reinforcement is higher beca...

Ngày tải lên: 07/08/2014, 14:20

... amounts of organoclay. The improvements of the thermal stabilities of a polymer by hybridising organoclay was due to the layered silicates of organoclay that make the path longer for the thermally ... hydrocarbon in the vulcanisate, whilst a and b are constants. The higher the Q f /Q g values, the lower the extent of the interaction between the filler...

Ngày tải lên: 07/08/2014, 14:20