Báo cáo vật lý: "Performance of Carbide Cutting Tool when Machining Cast Iron FC 250 in Dry Condition and Using Cutting Fluid" ppt

... Pemotong (Performance of Carbide Cutting Tool when Machining Cast Iron FC 250 in Dry Condition and Using Cutting Fluid) Jaharah A. Ghani*, Mohd Noor Azmi Mohd Rodzi, Noordin Ibrahim dan Che ... above. In dry machining, wear mechanisms were caused by adhesion and micro-attrition at low combination of machining parameters. While at high combination of machining parameters, the cutting ... cast iron FC 250 in dry conditions and when using the cutting fluid has been carried out with emphasis on mechanisms of wear experienced by the cutting edge. In addition, the effects of other...

Báo cáo vật lý: "Analysis of Trace Elements in Teeth by ICP-MS: Implications for Caries" pptx

... rural area, and its inhabitants obtain their livelihood from agriculture. In addition, the inhabitants of this city drink underground water, and 99% of the population cooks their meals using metallic ... techniques, including the use of microprobes. Our results indicate that trace elements are systematically but inhomogeneously distributed within the enamel and dentine of teeth.10 Sources of Cd include ... determined the concentrations of different elements in the enamel, dentine crown, dentine root and the pulp in nine teeth using synchrotron microprobe radiation. Also using synchrotron microprobe...

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

... diameter and pore volume increased with increasing pH. This phenomenon can be clearly explained based on the understanding of the interactions between the surfactant and silicate. Below a pH of 2.0, ... micelles during the synthesis.8 Hence, many aspects of the synthesis processes are involved in developing these porous materials, and they still require greater insight and understanding. A ... decreased with increasing pH. This phenomenon was clearly explained based on the understanding of the interaction between the surfactant and silicates. Thus, the ratio of TEOS/TCP and the pH were...

Báo cáo vật lý: "Decolourisation of Reactive Orange 16 by Activated Carbon and Copper Oxide Catalysts Supported by Activated Carbon" ppsx

... high oxidising power of free radicals. Production of these radicals is achieved using either single oxidants or combinations of ozone, H2O2 and UV radiation13 and a combination of H2O2 ... observed for Cu-AC and Cu-AC/UV and for Cu-AC/H2O2 and Cu-AC/H2O2/UV, as depicted in Figure 7. A steady decline in the intensity of the 387 nm and 492 nm peaks observed in Figure 7(a) signifies ... obtained for different ACs and Cu-ACs are shown in Figure 3. All the isotherms belong to type I in the Brunauer-Deming-Deming-Teller (BDDT) classification, which is indicative of the presence of...

Báo cáo vật lý: "Preparation of ZrO2/Al2O3-pillared Saponite and Its Spectroscopic Investigation on NOX Adsorption" pptx

... wavelength of Zr/APS is estimated to be in the range of 215 250 nm, suggesting nano size zirconia formation in the APS matrix. The character of spectra indicates the formation of monoclinic metaphase ... reported9 in the synthesis of titanium (Ti) pillared clays and the dispersion of TiO2 in an aluminium pillared saponite matrix. In addition, the difficulty of detecting the ZrO2 phase in Zr/APS ... 5.59o, corresponding to the height of the basal spacing, d001 = 12.44 Å, as previously reported.7,8 The in- plane reflection (hkl) of the indices, independent of c-axis ordering, were observed...

Báo cáo vật lý: "Evaluation of In Vitro Antioxidant Activity of 5H-dibenz[b,f]azepine and Its Analogues" ppt

... schemes 1–3. In scheme 3, binstdition, and compound (f) was obtained by using acid chloride,chloride, at RT instead of using acetic anhydride in the presence ostrong base in the reflux condition. ... cancer and are gaining f preventive lly useful e generated in various components of the body (e.g., lipids, proteins and nucleic acids) and may also be involved in processes leading to ... performed in the absence of the compound to determine the amount of lipid peroxidation obtained in control experiment. The ity (% ALP) was calculated using the nteers, and r 10 min at ated...

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

... reflectivity of the electric field from a single interface, and n1 and n2 are the optical indices of the alternating Bλ/4 material layers. As stated above, the Bλ/4 optical thickness of the ... surface-emitting laser (VCSEL) type of laser. In this paper, we report the influence of different substrates on the reflectivity of DBR structure by using three different substrates, sapphire, silicon carbide ... possibility of producing vertically working optoelectronic devices using conductive SiC. But it is not widely used because of its cost, chemical inertness and mechanical hardness. When the growth...

Báo cáo vật lý: "PREPARATION OF SELENIUM-DOPED ACTIVATED CARBON AND ITS UTILIZATION FOR IMPROVING THE QUALITY OF USED COCONUT OIL" pps

... Changes in susceptibility of tissues to lipid peroxidation after ingestion of various levels of docosahexaenoic acid and vitamin E. Br. J. Nutr., 78, 655–669. 22. Hussein, M.Z., Kuang, D., Zainal, ... distribution and nitrogen adsorption-desorption isotherm of the samples were obtained using a gas sorption analyzer (NOVA 1000). Each of the AC and MAC samples was heated by passing N2 gas for 45 min ... 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) vinegar...

Báo cáo vật lý: "FABRICATION OF LOW COST OF ALUMINIUM MATRIX COMPOSITE REINFORCED WITH SILICA SAND" potx

... sample was determined by dividing the mass of sample by its volume and the sintered density of sintered samples was measured using pycnometer density machine. Both green and sintered densities ... FABRICATION OF LOW COST OF ALUMINIUM MATRIX COMPOSITE REINFORCED WITH SILICA SAND H. Zuhailawati*, P. Samayamutthirian and C.H. Mohd Haizu School of Materials and Mineral Resources Engineering, ... measured using a Vickers hardness tester while modulus of rupture was obtained by the 3-point bending test. The fracture surfaces after the bending test were characterized by using scanning electron...

Báo cáo vật lý: "EFFECT OF FIELD STRENGTH IN THE VELOCITY ANISOTROPY OF FERROFLUIDS" pptx

... existence of grain-field interactions and grain-grain interactions are confirmed in the ferrofluid system and this make one to think of using the fluid for biomedical applications. Grain-field interactions ... observations are interpreted in terms of grain-grain interaction and grain-field interaction that exist in the system. The field strength is found to enhance the structural formation in the system ... comparing these values with the values obtained under no field condition, it is observed that the increasing strength of external magnetic field, in general shows a non-linear increase in sound...

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