Báo cáo vật lý: "THE EFFECT OF ADDITIVES ON THE SIZE OF Fe3O4 PARTICLES" ppt

Báo cáo vật lý: "Selective Oxygenation and Plant-Growth Regulatory Activity of Sesquiterpene Lactones" pot

... 4. CONCLUSION The SeO2/UHP/PEG-400 system is more reactive and selective, and when one considers the combined benefits of economics, selectivity and safety, UHP emerges as one of the ... containing 30 ml of the test solution. The final observations were recorded on day 8. The experiment was repeated 3 times at 27 ± 2°C. 3. RESULTS AND DISCUSSION Sesquiterpene lactones ... get rid of side products of compounds 8 and 9 that are a result of Michael-type addition to the α-methylene of γ-lactone by OCH3, we changed the solvent to PEG-400. Dehydrocostus lactone and...

Báo cáo vật lý: "THE EFFECT OF ADDITIVES ON THE SIZE OF Fe3O4 PARTICLES" ppt

... various additives. Generally, the additives have a significant influence on the size and size distribution of resultant products. In relation to the normally prepared magnetite, the type of additives ... reduce the surface energy of the particles therefore making the resultant particles more stable. 4. CONCLUSIONS The size, size distribution and to some extent the morphology of the as-formed ... *Corresponding author: bmohamad@usm.my Abstract: The study on the effect of different additives on the size and size uniformity of magnetite (Fe3O4) nanoparticles is described. The magnetite...

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 ... Under the effect of an external magnetic field, the particles of the ferrofluid aggregate and chain-clusters appear to arrange along the direction of the field. The perusal of Table 2 further ... number of component molecules or the development of size of the components. The same fluid is used throughout the experiment and hence no chance for the change in the number of components...

Báo cáo vật lý: "Emulsion Polymers of Core-Shell Styrene-Butyl Acrylate: The Effect of Feeding and Aging Time on Particle Size Distribution" pdf

... research on the color effect of film crystals based on the theory of light reflection is originated from the work of Yablonovitch and John. Yablonovitch and John predicted that three dimensional ... and Table 2 show the effect of aging time on the conversion of core-shell emulsion polymers. The results indicate that the conversion increases with aging time. An aging time of 30 min yielded ... (ratio of core-shell to feeding time). The results of the conversion and particle size to the ratio of the feeding time are given in Table 1. Table 1 shows that as the feeding time of the core...

Báo cáo vật lý: "The Effect of Triethylene Diamine on the Properties of Waste Paper Foam Composites" ppsx

... 3: The effect of filler content on the hardness of PS foam produced with and without a TEDA catalyst. 4. CONCLUSION The effect of TEDA as a catalyst and waste paper filler content on the ... present the chemical composition of the organic and inorganic components of the waste paper. The addition of fillers, which serve to reinforce the foam, significantly increased the value of the ... foam with and without the catalyst are shown in Table 5. Figure 1 demonstrates the effect of filler content of the PS foam with and without the presence of the catalyst on the resulting compressive...

Báo cáo vật lý: "Compatibilisation of Polypropylene/Ethylene Propylene Diene Terpolymer/Kaolin Composites: The Effect of Maleic AnhydrideGrafted-Polypropylene" docx

... often increase the performance of polymeric products. The degree of improvement depends on the choice of filler origin, particle size and shape, the fraction of filler, and the surface treatment ... hydroxyl group of the fibre.8–14 This article reports the result of an investigation on the effect of MAPP as a compatibiliser on the mechanical properties and morphology of PP/EPDM/Kaolin ... and reduction of the ductility of composites, which consequently lowered the elongation at break of PP/EPDM/Kaolin composites. Again at a similar filler loading, the Young’s modulii of kaolin...

Báo cáo vật lý: "Effect of Filler Incorporation on the Fracture Toughness Properties of Denture Base Poly(Methyl Methacrylate)" pptx

... 1: Effect of filler content on the fracture toughness of the PMMA matrix containing 10 wt% BaTiO3. 3.2 The Effect of SBF Exposure on Fracture Toughness The mechanical properties of ... 1 0Effect of Filler Incorporation on the Fracture Toughness Properties 4. CONCLUSION The general behaviour of the tested materials showed that the dry samples provided higher values of ... affected by an aqueous environment in the long term.12 Figure 2 shows the effects of SBF on the fracture toughness of various formulations of denture base materials. The PMMA matrix revealed...

Báo cáo vật lý: "Effect of Treated and Untreated Filler Loading on the Mechanical, Morphological, and Water Absorption Properties of Water Hyacinth FibersLow Density Polyethylene Composites" pdf

... The elongation break is further reduced to less than 50% as the filler concentration increased to 15 phr and 25 phr. When the percentage of filler loading was increased, the ductility of the ... (phr)Elongation at break (%)Untreated FibersTreated Fibers Figure 3: Effect of filler loading on the elongation at break of the LDPE/WHF composites with untreated and treated WHF. Effect of ... sorption,Qt (mole %)UntreatedFibersTreated Fibers Figure 7: The effect of filler loading on the molar sorption of the composites. George et al.9 have reported that the hydrophilicity of the...

Báo cáo vật lý: "Influence of the Silica-to-Surfactant Ratio and the pH of Synthesis on the Characteristics of Mesoporous SBA-15" ppt

... L. (2003). Chemistry of silica at different concentrations of non-ionic surfactant solutions: Effect of pH of the synthesis gel on the preparation of mesoporous silica. Microporous Mesoporous ... Si-OH2+.22 The hydrated PEO was protonated or H+ interacted to the EO part through the electrostatic interaction (S0H+) upon the addition of HCl. The hydrophilic region of the surfactant ... amounts of C1– ions. Therefore, for the partial dehydration of PEO units, the volume of the hydrophilic part of the micelle decreases. This leads to an increase in the hydrophobic region or...

... equation (5). Understanding the changes in these two constant values would lead to a better understanding of the changes in the Ea. Observation of the trend of the curve-line from the left ... respectively the least and the most sensitive to the influence of temperature. This observation is not in consistent to the trend of oTT value on each vegetable oil. The oil with the greatest ... equation and, together with the infinite-temperature viscosity constant, represents the fundamental value of the Ea constant. The stability of the viscosity – temperature observation is best indicated...

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