Báo cáo vật lý: "MORPHOLOGY STUDIES OF POROUS GaP, SYNTHESIZED BY LASER-INDUCED ETCHING" pdf

Báo cáo vật lý: "Electrochemical Studies of Mild Steel Corrosion Inhibition in Aqueous Solution by Uncaria gambir Extract" doc

... Electrochemical Studies of Mild Steel Corrosion Inhibition 8 Table 4: Corrosion parameters for mild steel in aqueous solution with absence and presence of various pH of 150 ppm ethyl acetate extracts of ... Electrochemical Studies of Mild Steel Corrosion Inhibition 6  Figure 1: The relation between percentage of inhibition with concentration of ethyl acetate extract of U. gambir. Conc. (ppm) Inhibition ... inhibitive effect of ethyl acetate extract of U. gambir as a green corrosion inhibitor of mild steel in aqueous solution. The assessment of the corrosion behaviour was studied using weight loss...

Báo cáo vật lý: "A Perspective of Oil Palm and Its Wastes" doc

... A Perspective of Oil Palm and Its Waste 74 Fresh fruit bunches (FFB)Sterilisation and stripping Digestion, clarification and pressing Palm oil Empty fruit bunches (EFB) Fresh fruits Palm ... discharge of the effluents.27 The total A Perspective of Oil Palm and Its Waste 72 providing competitive prices on oil palm, the liberalisation of export duties and the encouragement of counter-trades ... world crude oil demand. 3. UTILISATION OF OIL PALM WASTES The use of oil palm biomass other than the palm oil leads to increased efficiency as more energy is obtained from oil palm plantations....

Báo cáo vật lý: "ATTENUATION STUDIES ON DRY AND HYDRATED CROSS-LINKED HYDROPHILIC COPOLYMER MATERIALS AT 8.02 TO 28.43 keV USING X-RAY FLUORESCENT SOURCES" ppt

... fat, 75% muscle), Breast 2 as Journal of Physical Science, Vol. 18(1), 23–32, 2007 23 ATTENUATION STUDIES ON DRY AND HYDRATED CROSS-LINKED HYDROPHILIC COPOLYMER MATERIALS AT 8.02 TO 28.43 ... to be used as breast phantom materials since they can be made to have similar elemental composition as that of body soft tissues. Photon attenuation measurements were performed on dry and hydrated ... experiment was to determine the mass attenuation coefficients of dry and hydrated hydrophilic copolymer materials, in the mammographic energy range. 2. MATERIALS AND METHOD 2.1. Copolymer...

Báo cáo vật lý: " WEAR MECHANISM OF TiN, TiAlN AND TiCN COATED DRILLS DURING DRILLING OF CARBON STEEL" pptx

... throughout the drilling performance test. Wear Mechanism of TiN, TiAIN and TiCN Coated Drills 76 mechanism develops during drilling of TiCN, TiN and TiAlN coated drills on the medium carbon ... composed of ferum Journal of Physical Science, Vol. 18(1), 75–85, 2007 75 WEAR MECHANISM OF TiN, TiAlN AND TiCN COATED DRILLS DURING DRILLING OF CARBON STEEL R.J. Talib*, M.R.M. Toff and ... stage of drilling, it was observed that a complex mixture of wear mechanism of abrasion and adhesion were taken during drilling process. Then, the wear mechanism changed to a complex mechanism...

Báo cáo vật lý: "MORPHOLOGY STUDIES OF POROUS GaP, SYNTHESIZED BY LASER-INDUCED ETCHING" pdf

... Science, Vol. 18(1), 103–116, 2007 103 MORPHOLOGY STUDIES OF POROUS GaP, SYNTHESIZED BY LASER-INDUCED ETCHING Khalid M. Omar School of Physics, Universiti Sains Malaysia, 11800 USM Pulau ... this work, we study the surface morphology of porous layers obtained by laser-induced etching of n-type GaP (100) substrates. The morphology of porous gallium phosphide layers changes rapidly ... Figure 4: SEM images of LIE synthesized porous GaP at laser power density of 6 W/cm2 for (a) 5 min, (b) 10 min, and (c) 15 min irradiation time Morphology Studies of Porous GaP 106 The samples...

Báo cáo vật lý: "TEMPERATURE DEPENDENCE OF RAMAN SPECTRA OF POROUS GAP" docx

... Line-width Raman Line-width (cm–1) Figure 5: Temperature dependence of line-width of LO phonon. Temperature Dependence of Raman Spectra 56 Table 3: Parameters used for temperature dependence ... decay of optical phonons. Phys. Rev., 148, 845–848. Temperature Dependence of Raman Spectra 52 Figure 2: Schematic diagram of LIE process. 3. RESULTS AND DISCUSSION 3.1. Raman Spectrum ... Raman Spectrum of Porous GaP The Raman spectrum of porous GaP sample prepared using the LIE technique is shown in Figure 3. The Raman peak position shifted to a lower frequency of 398 cm–1...

Báo cáo vật lý: "ULTRASONIC STUDY OF THE SELF–ASSOCIATION OF ANILINE IN ETHANOL-CYCLOHEXANE MIXTURES" pptx

... an increasing trend appeared with increasing mole fraction of aniline. The increasing trend of η revealed that the addition of aniline increases the effective molecular area.14 The increased ... estimated using the standard relations. The results are interpreted in terms of molecular interaction between the components of the mixtures. Observed excess value in the mixture indicates the existence ... perusal of Table 2 showed that πi is in increasing trend, thus revealing that the reduction of Vf is not due to splitting of components but is of enlargement. Thus, aniline is bound to combine...

Báo cáo vật lý: "AN OVERVIEW OF BIASED ESTIMATOR" pptx

... squared error of is less than the mean squared error of for . ˆ()rkγˆrγ0>kˆ()rkγˆrγ0 <≤rp Journal of Physical Science, Vol. 18(2), 89–106, 2007 89 AN OVERVIEW OF BIASED ESTIMATORS ... the almost unbiased generalized Liu estimator and unbiased estimation of the bias and MSE. Communications in Statistics-Theory and Methods, 24(7), 1789–1797. An Overview of Biased Estimators ... to be unbiased; otherwise, it is said to be biased. The mean squared error of an estimator is a measure of the goodness of the estimator. The least squares estimator (which is an unbiased...

Báo cáo vật lý: "Mixing Behavior of Binary Polymer Particles in Bubbling Fluidized Bed" doc

... parameters influencing the solids mixing in the bubbling fluidized bed. From the results, complete mixing of binary polymer particles was attained at a bed depth of 17 cm and gas velocity of 1.38 ... effect of bed height to the mixing process. Journal of Physical Science, Vol. 19(1), 13–29, 2008 13 Mixing Behavior of Binary Polymer Particles in Bubbling Fluidized Bed S.M. Tasirin, ... Mixing Behavior of Polymer Particles 14 mixing in bubbling fluidized bed is well-understood but it is still not possible to predict the effect of operating parameters on the degree of mixing in...

Báo cáo vật lý: "Phase Transformation of Rust in the Presence of Various Tannins" pot

... oxides into Fe2+ ions due to their high reducing power. These Fe2+ ions can then be easily complexed by tannins, and into ferric-tannates in the presence of oxygen. Interestingly, the chloride ... transformation of the various tannins was as follows: chestnut tannins ≈ mixed (chestnut and mimosa) tannins > mimosa tannins XRD patterns of the rusted plates differ from that of the rust powder ... lepidocrocite, in the presence of various tannins could be observed. The relation between the partial transformation of pre-rusted samples and sample preparation is correlated. Keywords: tannins,...

Báo cáo vật lý: "Preliminary Studies for Production of Fatty Acids from Hydrolysis of Cooking Palm Oil Using C. rugosa Lipase" pot

... 79 Preliminary Studies for Production of Fatty Acids from Hydrolysis of Cooking Palm Oil Using C. rugosa Lipase N.A. Serri, A.H. Kamarudin*, S.N. Abdul Rahaman School Of Chemical Engineering, ... conversion of fatty acid.8 The optimum oil loading is 0.1 g/ml iso-octane. 3.4 Effect of Temperature The conversion of fatty acids produced from the hydrolysis of palm oil using C. rugosa ... DISCUSSION 3.1 Typical Hydrolysis Profile Figure 1 shows a typical hydrolysis profile of palm oil at temperature of 45ºC for an initial palm oil concentration of 0.1 g palm oil/ ml iso-octane at...

Báo cáo vật lý: "Enzymatic Reduction of Ketones to Optically Active Secondary Alcohols" ppsx

... temperature to 40°C. Keywords: ketones, secondary alcohols, enzymatic reduction 1. INTRODUCTION Enantioselective reduction of ketones to optically active secondary alcohols is one of the ... Journal of Physical Science, Vol. 19(2), 1–5, 2008 1 Enzymatic Reduction of Ketones to Optically Active Secondary Alcohols R.A. Bawa*, F. Ajjabou and E. Shalfooh Department of Chemistry, ... variety of aliphatic ketones, aryl ketones, α- and β-ketoesters. Aryl ketones, α- and β-ketoesters that contain phenyl substituents were reported to be reduced to the corresponding...

Báo cáo vật lý: "Mechanical Strength of Trass as Supplementary Cementing Material" docx

... strength of trass lime system as function of trass finenesses. Mechanical Strength of Trass 54 3. RESULTS AND DISCUSSION 3.1 Typical Oxides and Mineral Compositions of Trass Trass ... activations of trass explains and proves that trass could be used as a supplementary cementing material in blended cement. The increase of mechanical strength was also explained by an increase of heat ... age of curing, compressive strength of cube was measured. Pozzolanic reaction was monitored by TAM Air Calorimeter. Heat released during reaction of trass lime system was measured as heat...

Báo cáo vật lý: "Electrical Conductivity of Chlorophyll with Polythiophene Thin Film on Indium Tin Oxide as P-N Heterojunction Solar Cell" ppsx

... layered on Indium Tin Oxide (ITO) substrate as p-n heterojunction solar cell. PT thin film is deposited to the ITO substrate by using electrochemistry method. CHLO thin film is coated on PT thin film ... CHLO, kekonduksian elektrik dalam gelap Electrical Conductivity of Chlorophyll 86 showed that electrical conductivity of the PT thin films increase with the increasing of the CHLO thin film thickness ... *Corresponding author: hasiah@umt.edu.my Abstract: This work was focused on the study of electrical conductivity to the combination of Polythiophene (PT) thin film and Chlorophyll (CHLO) thin film...

Báo cáo vật lý: "Textural Characteristics of Activated Carbons Prepared from Oil Palm Shells Activated with ZnCl2 and Pyrolysis Under Nitrogen and Carbon Dioxide" doc

... Journal of Physical Science, Vol. 19(2), 93–104, 2008 93 Textural Characteristics of Activated Carbons Prepared from Oil Palm Shells Activated with ZnCl2 and Pyrolysis Under Nitrogen and Carbon ... textural characteristics of activated carbon prepared from oil palm shells activated with zinc chloride (ZnCl2) and pyrolysis under nitrogen and carbon dioxide were studied in this paper. The pyrolysis ... prepare and study the effect of different pyrolysis temperatures on the development of the porosity of activated carbon derived from oil palm shells activated with ZnCl2. The activated carbon...

Xem thêm