Resıstor Value Checker Kıt for Educatıonal Purpose

The use of technology in creating Teaching Aids (TA) for the Teaching and Learning (TL) process has a great impact on delivering knowledge and skills as well as expediting the learning process amongst students. Additionally, game-based TA plays an important role in improving the achievement and efficiency of students in the classroom. This research was conducted to develop the education kit for TL Resistor Color Code (RCC). The main purpose of this education kit development is to help students understand the RCC through a fun learning environment based on hands-on learning activity. This education kit known as Resistor Value Checker (RVC) kit is built on the concept of 21st Century Learning (21-CL) which concerns about the use of appropriate technology in the process of the TL in the classroom. It is designed with the latest facilities and different from existing products in the market

Rapid Determination of Non-steroidal Anti-inflammatory Drugs in Aquatic Matrices by Two-phase Micro-electrodriven Membrane Extraction Combined with Liquid Chromatography

Two-phase micro-electrodriven membrane extraction (EME) procedure for the pre-concentration of selected non-steroidal anti-inflammatory drugs (NSAIDs) in aquatic matrices was investigated. Agarose film was used as interface between donor and acceptor phase in EME which allowed for selective extraction of the analytes prior to high performance liquid chromatography-ultraviolet detection. Charged analytes were transported from basic aqueous sample solution through agarose film into 1-octanol as an acceptor phase at 9 V potential. Response surface methodology in conjunction with the central composite design showed good correlations between extraction time and applied voltage (R 2 > 0.9358). Under optimized extraction conditions, the method showed good linearity in the concentration range of 0.5-500 μg L -1 with coefficients of determination, r 2 ≥ 0.9942 and good limits of detection (0.14-0.42 μg L -1) and limits of quantification (0.52-1.21 μg L -1). The results also showed high enrichment factors (62-86) and good relative recoveries (72-114%) with acceptable reproducibilities (RSDs ≤ 7.5% n = 3). The method was successfully applied to the determination of NSAIDs from tap water and river water samples. The proposed method proved to be rapid, simple and requires low voltage and minute amounts of organic solvent, thus environmentally friendly

Eosinophil function in adipose tissue is regulated by Krüppel-like factor 3 (KLF3)

The conversion of white adipocytes to thermogenic beige adipocytes represents a potential mechanism to treat obesity and related metabolic disorders. However, the mechanisms involved in converting white to beige adipose tissue remain incompletely understood. Here we show profound beiging in a genetic mouse model lacking the transcriptional repressor Krüppel-like factor 3 (KLF3). Bone marrow transplants from these animals confer the beige phenotype on wild type recipients. Analysis of the cellular and molecular changes reveal an accumulation of eosinophils in adipose tissue. We examine the transcriptomic profile of adipose-resident eosinophils and posit that KLF3 regulates adipose tissue function via transcriptional control of secreted molecules linked to beiging. Furthermore, we provide evidence that eosinophils may directly act on adipocytes to drive beiging and highlight the critical role of these little-understood immune cells in thermogenesi

Extraction of FAME from fish waste by using modified soxhlet method

Abstract The number of fish waste has increased rapidly over the time. Most of discards composed of head, tail and internal organs are considered to be worthless. In this research, fish waste from Pangasius Hypopthalmus (Patin fish) was being used as the raw material to produce fish oil. Therefore, the objective of this research is to evaluate the effect of different ratio solid to solvent (1:1, 1:2, 1:3, 1:4 and 1:5), temperature (70, 75, 80, 85 and 90 °C) and mixing time (1, 2, 3, 4 and 5 hours) on production of fish oil and to analyze the amount of fatty acid methyl ester (FAME) in the fish oil. Sample preparation was being made by choosing solid fat from internal organ of Patin fish. Modified Soxhlet method was used to extract the fish oil from fish waste and ethanol as the solvent. FAME from extracted fish oil was analyze by using Gas Chromatography Mass Spectrometry (GCMS). The result showed that the highest yield of oil being produced was 59.92 ± 0.926 % at the temperature of 85 °C with 1:2 of ratio solid to solvent and 5 hours of mixing time. Besides, the extracted fish oil for sample 3 contained the highest amount of FAME which is 0.4016 mg/g with majority amount of saturated fatty acid.</jats:p

Effects of RH-WMA Additive on the Design Binder Content (DBC) of Warm Porous Asphalt (WPA)

Abstract Warm mix asphalt (WMA) in a pavement construction is a technology that is beneficial and contributes towards reduction of the global warming issues. In this research, WMA was used to design porous asphalt pavement with addition of organic additive which is known as RH-WMA. A Dutch modified gradation to suit Malaysian quarry practice was used to prepare the WMA. The RH-WMA additive ranges between 2 to 5 percent was added to base binder of penetration 60/70 to determine the design binder content (DBC) of the RH-WMA mix. The DBC was then determined based on the binder drainage and Cantabrian tests. The binder drainage test was used to set an upper limit while the Cantabrian test for abrasion loss was adopted to determine the lower limit of the DBC. The results for Cantabrian test indicate significant contribution of incorporating RH-WMA additive into WMA to minimize abrasion loss as compared to unmodified mixes. The binder drainage test results showed that the mixes incorporating RH-WMA additive exhibited higher drainage in varying degrees depending on the quantity of RH-WMA. The discussion was made based on target binder content, critical binder content, maximum binder content and the maximum retained binder content of the of the resulted mixes obtained from the binder drainage test.</jats:p

Rapid surface treatment of grey cast iron for reduction of friction and wear by alumina coating using gas tunnel plasma spray

Gas tunnel plasma spray (GTPS) technique produces a high energy density plasma jet for rapid fabrication of ceramic coatings. In this paper, alumina powder was sprayed onto a grey cast iron (GCI) substrate as friction and wear-resistant coating. GTPS parameters such as plasma input power, powder flow rate and nozzle to substrate distance were fixed at 2.8 kW, 2.4 ml/min and 10 mm, respectively. The microstructure and composition of the alumina coating were examined under a light microscope, scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). The physical properties of the alumina coating were evaluated by surface roughness measurement and pull-off adhesion test. A uniform, crack-free alumina coating of an average thickness of 3.0 µm and surface roughness of 0.2 µm was obtained after 10 s of deposition time. The adhesion of the alumina coating to the GCI substrate was measured around 9.5 MPa due to adhesive/glue failure. The tribological behavior of the alumina coating was studied using the ball on disc sliding wear test. Under a lubricated condition, the alumina coated specimens exhibit a relatively stable coefficient of friction (CoF) between 0.077 and 0.080 in which the values were lower as compared to the uncoated GCI specimens for all different applied loads (25 N, 50 N and 75 N). It was demonstrated that the alumina coating can decrease the CoF value and wear mass loss of the GCI substrate by at least 10% and 50%, respectively

Identification of critical source areas under present and projected land use for effective management of diffuse pollutants in an urbanized watershed

The land-use characteristics of a watershed determined the amount of pollution produced in it, which can be curtailed by implementation of best management practices (BMPs) in an identified critical source area (CSA). Present and future land-use scenarios of the watershed were produced, and the hydrological simulation program FORTRAN model was used to model the hydrology and in-stream pollutants’ concentrations. The validated model was utilized to identify the CSA for diffuse total nitrogen, total phosphorus, sediment, and biochemical oxygen demand considering the two land-use scenarios. The results showed that CSA and the water quality index produced by the two land-use scenarios varied in each of the diffuse pollutants considered. It was observed that some portion of the identified CSA remains unchanged despite the changes in the land use and this was attributed to consistent urban development in these areas. The results in this study illustrate that BMPs can be included in the design and planning of future urban expansion based on the identified CSA derived from the expected future land-use changes. As anticipated, this approach will provide resilience on the effects of urbanization on the diffuse pollutants loads in a rapidly urbanized watershed