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1
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Identification of Water Quality in Wet and Intermediate Zones in Selected, Sri Lanca: An Analytical Review

100%
Fowzul Ameer M. L.
World News of Natural Sciences
|
2018
|
vol. 19
19-31
EN
This study is based on the analysis of drinking water parameters in selected wet and intermediate zones of Sri Lanka. Unsafe drinking water is one of the main concerns in developing countries. In Sri Lanka, the drinking water quality is a major concern in many places. A series of studies have been conducted in intensive agricultural production areas, namely, Jaffna, Vavuniya, Anuradhapura, Kurunagala and Hambantota. This represents a longitudinal section of Sri Lanka, and the study was done to understand the groundwater quality over the years of 2004 to 2009. Water from selected areas were sampled throughout the villages of this area mostly from open wells and tube wells. The samples were analysed for their chemical quality in order to identify water quality as compared with the Sri Lankan Drinking water standard. For this study, Sodium (Na+), Calcium (Ca2+), Magnesium (Mg2+), Chloride (Clˉ), Sulphate (SO42ˉ) and Nitrate (NO3ˉ) were analysed. Accordingly, in the Dry Zone, the concentration of the Ca, Mg and Cl are higher than in the Wet Zones. Indeed, some sampling wells in the Dry Zones have extreme concentration of Ca (more than 1000 mg/l) and this is a major threat to the consumers for drinking purposes. In total, of 103 wells, 6 percent of the sampling wells were identified as contaminated, whereas in total, of 96 wells in the Dry Zone, 64 percent of the sampling wells were found to be contaminated due to chemical concentration. We found that rural areas are facing agrochemical-leaching problems into the groundwater, whereas urban areas are facing industrial and biological materials seeping into the ground and surface water bodies.
2
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Studies on carcinogenic PAHs emission generated by vehicles and its correlation to fuel and engine types

88%
Kumar V., Kothiyal N. C., Saruchi
Polish Journal of Chemical Technology
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2014
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vol. 16
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issue 1
48-58
EN
The objective of this study was to find major PAHs produced in ambient air from the automobile exhaust as a function of fuels (diesel, petrol, and biodiesel) and engine type qualitatively and quantitatively. The recovery range was found between 30% and 70%. The study was carried out on two, three, and four wheelers. Biodiesel samples tested in the study were synthesized indigenously from different starting raw materials and analyzed for PAHs concentration in the exhaust on a Honda genset (EBK 2000AC Model). Biodiesel samples were blended with diesel in different ratio (25:75, 35:65 and 45:55) to investigate the exhaust behavior. Biodiesel was blended with Diesel the concentration of almost all PAHs reduces in comparison to pure Diesel exhaust. B(a)A and B(a) P was the common PAH found in higher concentration in almost all fuels. FTIR results indicate esterification of vegetable oil and NMR results indicate a complete conversion of oils into biodiesel.
3
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Preliminary report on mineral suspension in the North Atlantic, the Baltic and the Norway Seas in summer

88%
Gurgul H., Gurgul H.
Polish Polar Research
|
2001
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vol. 22
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issue 3-4
4
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A reliable treatment of the homotopy analysis method for viscous flow over a non-linearly stretching sheet in presence of a chemical reaction and under influence of a magnetic field

88%
Dinarvand S.
Open Physics
|
2009
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vol. 7
|
issue 1
114-122
EN
The similarity solution for the steady two-dimensional flow of an incompressible viscous and electrically conducting fluid over a non-linearly semi-infinite stretching sheet in the presence of a chemical reaction and under the influence of a magnetic field gives a system of non-linear ordinary differential equations. These non-linear differential equations are analytically solved by applying a newly developed method, namely the Homotopy Analysis Method (HAM). The analytic solutions of the system of non-linear differential equations are constructed in the series form. The convergence of the obtained series solutions is carefully analyzed. Graphical results are presented to investigate the influence of the Schmidt number, magnetic parameter and chemical reaction parameter on the velocity and concentration fields. It is noted that the behavior of the HAM solution for concentration profiles is in good agreement with the numerical solution given in reference [A. Raptis, C. Perdikis, Int. J. Nonlinear Mech. 41, 527 (2006)].
5
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Estimation of the Crushed Ore Particles Density in the Pulp Flow Basedon the Dynamic Effects of High-Energy Ultrasound

75%
Morkun V., Morkun N.
Archives of Acoustics
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2018
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vol. 43
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issue 1
6
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Dual concentration in karate and its use in diagnosis of sport

75%
Pivovarník J.
Physical Activity Review
|
2016
|
vol. 4
81-88
EN
Introduction: The goal of our study was to identify and compare impact of specific dual focus of concen tration known in Goju - ryu school as a system of KZR (closed hands kata) - heishu, conce ntration inside the body versus KOR (open hands kata) - kaishu, conce ntration outside of the body . Method: . St udysample consisted of Karate Dojo Pivovarník karateka from Hanušovce nad Topľou, Slovak republic (n=7, 6 m en and 1 woman), all of them were holders of at least . 1 st . Dan maste r grade, they were able to practice in dual focus. We h ave compared the trainings performed by both system s KZR vs. KOR while respecting relatively identical co nditions. At the same time we observed physiologi cal, biochemical and somatic indicators. P articipants completed a questionnaire , consent form and filled out personality questionna ire . The data were evaluated with statistical programs MS Excel, SPSS Statistics, bio chemical results were obtained in laboratory Synlab Sl ovakia s.r.o, Prešov and the data were ca lculated by Dorste, Planta  14  . To determine the significance of difference s at entrances and exits KZR vs. KOR we used the Mann - Whitne U – test and Wilco xon test . S tatis tical significance was set at (p < 0. 01 , p < 0.05). Result: We assumed that the dual concentration will not ca use any significant differences from training KZR com pare to KOR. However, that was not confirmed. We have detected several statistically significant physiological biochemical and somatic differences. Summary: Our results po int to the possibility of efficiency gains and prediction in g training (performance, i ntensity etc. ). Nevertheless, this pilot study does not allow the results to be generalized for relatively small sample size , and the number of such studies, in spite of thisour study points out the high potential and possible future objectification.
7
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Application of multi-criteria analysis in evaluating the efficiency of diesel particulate filters

63%
Polivyanchuk A.
Teka Commission of Motorization and Power Industry in Agriculture
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2016
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vol. 16
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issue 3
8
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Concentration of Regional Development Potential in Poland, Valueand Dynamics in Years 2010-2017 and Forecast Form 2020

63%
Nadolny M., Nadolny M.
Biuletyn KPZK
|
2019
|
issue 273-274
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