Báo cáo vật lý: "Influence of the Silica-to-Surfactant Ratio and the pH of Synthesis on the Characteristics of Mesoporous SBA-15" ppt
Báo cáo vật lý: "Influence of the Silica-to-Surfactant Ratio and the pH of Synthesis on the Characteristics of Mesoporous SBA-15" ppt
... available in the literature.
10,11
It is reported
that the ratio of the silica source to the surfactant ratio and the pH of the synthesis
gel can greatly influence the characteristics of the resulting ... amounts of C1
–
ions. Therefore, for the partial dehydration
of PEO units, the volume of the hydrophilic part of the micelle decreases....
Báo cáo vật lý: "The Hidden Property of Arrhenius-type Relationship: Viscosity as a Function of Temperature" doc
... equation (5).
Understanding the changes in these two constant values would lead to a better
understanding of the changes in the E
a
. Observation of the trend of the curve-line
from the left ... traditional properties of activation energy
and infinite-temperature viscosity constants, and it contains a new constant that is the
zero-temperature viscosity. The rat...
Báo cáo vật lý: "The Kinetics and Mechanism of the Core-shell Styrene-butyl Acrylate Polymerisation" pdf
... polymerisation rate of the styrene core, and k is the rate reaction
constant in the formation of the styrene core.
3.4 Mechanism of Reaction in the Formation of the Styrene Core
The order of the ... concentration, the reaction rate becomes
larger than the rate proposed by the Smith and Ewart theory.
6
3.2 The Reaction Order of SLS
The inf...
Báo cáo vật lý: "EFFECTS OF Si, Al2O3 AND SiC SUBSTRATES ON THE CHARACTERISTICS OF DBRS STRUCTURE FOR GaN BASED LASER" ppsx
... substrate. Where
and are
the refractive indices of the substrate and the corresponding layer respectively,
is the geometrical thickness of the corresponding quarter wave layers and
s
n
2,1
n
2,1
d
B
λ
... INTRODUCTION
III-V nitride semiconductors offer a wide range of applications due to
their wide direct band gap, which is not found in conventional semiconduct...
Báo cáo vật lý: "PREPARATION OF SELENIUM-DOPED ACTIVATED CARBON AND ITS UTILIZATION FOR IMPROVING THE QUALITY OF USED COCONUT OIL" pps
... certified solutions of known
concentration of Se (500 mg/l). Standards are obtained from the National Bureau
of Standards, IAEA, and commercial sources.
2.2. Materials
Coconut fruits and 5% (v/v) ...
3.3 Determination of Se in MAC
The following reaction of Se with neutron
74
34
26
resulted in radioactive
isotope of Se. The concentration of Se in the fresh...
Báo cáo vật lý: "EFFECT OF FIELD STRENGTH IN THE VELOCITY ANISOTROPY OF FERROFLUIDS" pptx
... al.
23
concluded that at equilibrium, the magnitude of the
magnetization is a function of the strength of external magnetic field, the volume
concentration of the magnetic particles (their magnetic ... counteracts the orientation of the magnetic moments into the
direction of the field. In a strong field, most of the particles become oriented and
the m...
Báo cáo vật lý: "ULTRASONIC STUDY OF THE SELF–ASSOCIATION OF ANILINE IN ETHANOL-CYCLOHEXANE MIXTURES" pptx
... electrolytic solutions of copper
sulphate (CuSO
4
.5H
2
O) and nickel sulphate (NiSO
4
.7H
2
O) in water. They
concluded the existence of solute-solvent interactions between the components of
the system. ... passage of sonic
waves through the medium.
Such studies as a function of concentration are useful in gaining an
insight into the structure and bonding of...
Báo cáo vật lý: "Phase Transformation of Rust in the Presence of Various Tannins" pot
... adsorption of the tannins to the rusty surface, (ii)
complexation of ferrous/ferric ions or complexation of surface iron
Phase Transformation of Rust 38
Figure 6: XRD patterns of a ... lepidokrosit, magnetit
Phase Transformation of Rust 32
1. INTRODUCTION
The atmospheric corrosion of steel structures often results in the
formation of iron ox...
Báo cáo vật lý: "The Potentiometric Analysis of Chloride Ion Using Modified Heterogeneous Chitosan Membranes" pdf
... surface. The
smaller the ions the more easily they were in their mobility to the membrane
surface than bulky ions.
The 1.0 x 10
–2
M concentration of interfering ions, B, used in these
experiments ... Cl
–
solution
|
Figure 2: Illustration of ion-exchange mechanism at the surface of membrane.
The mobility to and exchange of Cl
–
ion at cationic sites in...
Báo cáo vật lý: "Immobilization of Dithizone onto Chitin Isolated from Prawn Seawater Shells (P. merguensis) and its Preliminary Study for the Adsorption of Cd(II) Ion" pdf
...
absorption peaks of dithizone. On the other hand, although longer reaction time
gives better immobilization, it seems that the active sites of the dithizone ligand
bound to the surface of chitin ...
for 3 h and the adsorbents were then separated from the adsorption medium. The
concentration of Cd(II) ions in the solution was determined by AAS and the
amou...