Distributions of Cd, Cu, Pb, and Zn in the surface sediments from two sites of the Kuala Gula Bird Sanctuary, Malaysia were monitored for a period of 6 months from October 2006 to March 2007. In December 2006, the concentration of Zn in one location was significantly ( p50.05) higher (3.9 AE 1.3 mg kg À1 ) than the other metals at both sites, but in the oxidizable organic fraction it was highest at both sites during October; with mean concentrations of 18 mg kg À1 at both locations. In the acid-reducible fraction, high concentrations of Pb (2.3 mg kg À1 ) were detected at station 2 in February 2007, being highest among all four metals at both stations. The acid-reducible fraction found in Pb ranged from 0.10% to 3.1% in both stations. Percentages ranging from 51% to 96% were observed for all four metals in the resistant fraction throughout the sampling period. These results indicate low contributions from anthropogenic sources. The findings constitute a baseline data archive for future reference.
Problem statement: Agriculture sector in Malaysia has been intensified through the Eight and Ninth Malaysian Plan. In order to further develop this sector, contract farming activities such as leech rearing, worm rearing, herbs and mushroom have been introduced to the community. But do the communities especially the youth have a positive acceptance towards this activity? Approach: This was a quantitative study. The respondents were among two agriculture learning institutions in Malaysia. From a simple random sampling, a total of 194 respondents were selected. The data collection took two months to be completed. Results: From the multiple linear regression employed, it can be concluded that attitude, belief and knowledge are the significant contributor for acceptance towards contract farming. Conclusion/Recommendation: It is recommended that more studies can be conducted to inspect the complexities related with youths participation in contract farming and special attention should be highlighted to identify what universities can do in strategizing specific agricultural courses that would motivate youth to possess a better acceptance towards contract farming.
Problem statement:The main objective of this study was to investigate how human capital can affect growth in different economies. Approach: For this purpose, we investigated the model, which the growth rate of total factor productivity depends on human capital stock level using a cross-country panel approach for 104 countries in five-year intervals during the 1980-2005. Results: The finding of this study showed that human capital through its effect on the speed of technology adoption from abroad has positive effect and significantly on growth in total samples of countries while human capital directly in developed countries enter negatively inverse developing countries. Conclusion: Moreover human capital affects growth in different ways it has more effects on per capital growth through technology/catch-up component than domestic innovation component. Moreover human capital of different ways has different effects on growth but in total it has positive effect on economic growth.
Purpose of this study is the consideration of loading and contact problems encountered at rotating machine elements and especially at toothed gears. The later are some of the most commonly used mechanical components for rotary motion and power transmission. This fact proves the necessity for improved reliability and enhanced service life, which require precise and clear knowledge of the stress field at gear tooth. This study investigates the maximum allowable stresses occurring during spur gear tooth meshing computed using Niemann's formulas at Highest Point of Single Tooth Contact (HPSTC). Gear material, module, power rating and number of teeth are considered as variable parameters. Furthermore, the maximum allowable stresses for maximum power transmission conditions are considered keeping the other parameters constant. After the application of Niemann's formulas to both loading cases, the derived results are compared to the respective estimations of Finite Element Method (FEM) using ANSYS software. Comparison of the results derived from Niemann's formulas and FEM show that deviations between the two methods are kept at low level for both loading cases independently of the applied power (either random or maximum) and the respective tangential load.
In the present study we report the micellization behavior of imipramine hydrochloride (IMP) in absence and presence of different concentrations of inorganic salts (LiCl, NaF, NaCl, NaBr, and KCl) and ureas (urea and thiourea) over the temperature range from 288.15 to 303.15 K. The critical micellization concentrations (cmc) of drug and drug + additive systems were determined by conductometric technique. With increasing temperature the cmc first increases then decreases. Maximum cmc values were obtained at 293.15 K with or without additives. In presence of inorganic salts the cmc value decreases which is explained on the basis of nature and ion size of the added ion. Urea and thiourea also decrease the cmc at low concentrations (0.2 mmol •L-1 urea and 0.1 mmol •L-1 thiourea), but, at higher concentrations, increase in cmc is observed. The related thermodynamic parameters are also evaluated and discussed.
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