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