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Jayaprakash, R.
- Study of Thermo Physical Properties and an Improvement in Production of Distillate Yield in Pyramid Solar still with Boosting Mirror
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PDF Views:124
Authors
Affiliations
1 Solar Energy Laboratory, Dept. of Physics, Sri Ramakrishna Mission Vidyalaya, College of Arts and Science, Coimbatore-641020, TN, IN
2 Dept. of Science and Humanities, RVS College of Engineering and Technology, Coimbatore, TN, IN
3 Dept. of Physics, M.E.S College of Engineering, Kerala-679573, IN
4 Dept. of Physics, Coimbatore Institute of Engineering and Information Technology, Coimbatore – 641109, TN, IN
5 Centre for Appropriate Management, Chandragupt Institute of Management, Chajubagh, Patna- 800 001, Bihar, IN
1 Solar Energy Laboratory, Dept. of Physics, Sri Ramakrishna Mission Vidyalaya, College of Arts and Science, Coimbatore-641020, TN, IN
2 Dept. of Science and Humanities, RVS College of Engineering and Technology, Coimbatore, TN, IN
3 Dept. of Physics, M.E.S College of Engineering, Kerala-679573, IN
4 Dept. of Physics, Coimbatore Institute of Engineering and Information Technology, Coimbatore – 641109, TN, IN
5 Centre for Appropriate Management, Chandragupt Institute of Management, Chajubagh, Patna- 800 001, Bihar, IN
Source
Indian Journal of Science and Technology, Vol 3, No 8 (2010), Pagination: 879-884Abstract
We report the experimental analysis of a pyramid solar still with boosting mirror system for increasing the distillate yield rate under clear climatic conditions in Coimbatore (11° N latitude), India. The radiation received by the still is boosted up by reflecting the solar radiation. A tracking system keeps track of incident radiation into the still. The area of the still is 0.25 m2. Water and ambient temperature are measured along with solar radiation and humidity at regular intervals of time. The inner and outer faces of the glass cover temperatures are also recorded. The average solar radiation received is 760.43 W/m2. The daily average efficiency of the still was found to be 15%. A 2.9 l/m2/d distillate yield is obtained with the help of the boosting mirror; whereas, 1.52 l/m2/day are collected without the boosting mirror. In this work an attempt has been made to study the effect of heat transfer within a pyramid solar still. The thermo physical properties of the still are analyzed for this study. Thermal conductivity dynamic viscosities of water are also studied for this system. The thermal conductivity is in the range of 26.77 x 10-2 Wm-2 C-1 to 29.64 Wm-2 C-1. Dynamic viscosity ranges from 18.6 x 10-6 Nsm-2 to 20.2 x 10-6 Nsm-2.Keywords
Solar Energy, Booster Mirror, Desalination, Potable WaterReferences
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- Persistence of Acetamiprid in Selected Soils of Karnataka
Abstract Views :176 |
PDF Views:1
Authors
Affiliations
1 Krishi Vignan Kendra, College of Fishery, Manglore (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
3 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
4 N.B.S.S. and L.U.P., Hebbal, Bengaluru (Karnataka), IN
1 Krishi Vignan Kendra, College of Fishery, Manglore (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
3 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
4 N.B.S.S. and L.U.P., Hebbal, Bengaluru (Karnataka), IN
Source
An Asian Journal of Soil Science, Vol 7, No 2 (2012), Pagination: 214-217Abstract
Persistence and degradation of acetamipirid was determined in soils of three different locations of Karnataka viz., Kodagu, Bangalore and Chamarajanagar. The soils were incubated at 25 mg kg-1 of acetamiprid using soluble powder formulation grade acetamiprid (Star-20) under different moisture regimes air dry, field capacity, submergence and alternate wetting-drying. The persistence of acetamiprid differed in all the three soils. Higher persistence was noticed in Chamarajanagar soil followed by Kodagu and Bangalore soils. Half-life (t1/2) of acetamiprid was found to be was highest in air dry moisture regime in Chamarajanagar soil (97.6 days) compared to Kodagu soil (96.8 days) and Bangalore soil (95.2 days). The half-life values in field capacity, submergence and alternate wetting-drying are 56.7, 64.5 and 61.8 days (Kodagu), 59.4, 66.7 and 57.7 (Bangalore) and 59.1, 66.7 and 70.8 days (Chamarajanagar) soils, respectively. The degradable pattern of acetamiprid residue followed a close correspondence to first order exponential degradation in all the three soils.Keywords
Acetamipirid, Field Capacity, Submergence, Alternate Wetting-Drying, Exponential Degradation.- Phsico-Chemical Properties of Surface Soils in Arecanut Growing Region of Southern Karnataka (Non-Traditional)
Abstract Views :148 |
PDF Views:0
Authors
Affiliations
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, Navile, Shimoga (Karnataka), IN
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, Navile, Shimoga (Karnataka), IN
Source
An Asian Journal of Soil Science, Vol 7, No 2 (2012), Pagination: 324-326Abstract
Hundred surface samples were collected for the analysis of phsico-chemical properties in southern Karnataka (Non-traditional). Total hundred representative surface samples were collected from the depth viz., 0-20 cms (surface), from the 4 districts namely Chitradurga, Davanagere, Chikkamangalur and part of Shivamoga comprising of 10 taluks. The samples were analysed for different physical and chemical properties. The study revealed that most of the soils were sandy clay loam and pH ranged from strongly acidic to slightly alkaline. Organic carbon ranged from 3.3 g kg-1 to 19.0 kg-1 and cation exchange capacity ranged from 9.0 cmol (p+) kg-1 to 29.0 cmol (p+) kg-1.Keywords
Arecanut, Non-Traditional Region, Surface Soils.- Effect of Acetamiprid on Enzyme Activity in Selected Soils of Karnataka
Abstract Views :196 |
PDF Views:0
Authors
Affiliations
1 Krishi Vignan Kendra, College of Fishery, Manglore (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
3 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
4 N.B.S.S. and L.U.P., Hebbal, Bengaluru (Karnataka), IN
1 Krishi Vignan Kendra, College of Fishery, Manglore (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
3 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
4 N.B.S.S. and L.U.P., Hebbal, Bengaluru (Karnataka), IN
Source
An Asian Journal of Soil Science, Vol 7, No 2 (2012), Pagination: 331-335Abstract
The impact of acetamiprid on selected soil enzymes dehydrogenase, urease and phosphatase was studied using surface layer (0-15 cm) samples of movement studies. The samples were taken at different interval (10, 20, 30, 45 and 60 days) under field capacity and the enzyme activities were analyzed for Kodagu, Bangalore and Chamarajanagar soils of Karnataka. Highest inhibition was found on 10th day incubation compared to initial activity in all the enzymes. The increased activity of all the three enzymes was observed from 20th day incubation and reached maximum in 60th day incubation. The highest dehydrogenase activity was recorded in Bangalore soil (58.93 μg TPF g-1 soil h-1) and the lowest activity was recorded in Kodagu soil (16.05 ig TPF g-1 soil h-1). The highest urease activity was recorded in Bangalore soil (356.66 ig urea g-1 soil h-1) and the lowest activity was recorded in Kodagu soil (341.81 ig urea g-1 soil h-1). The highest activity of acid phosphatase activity was recorded in Kodagu soil of pH 5.32 (6.23 μg pnitrophenol hydrolyzed g-1 soil h-1) followed by Bangalore (4.86 μg p-nitrophenol hydrolyzed g-1 soil h-1) and Chamarajanagar (4.63 μg p-nitrophenol hydrolyzed g-1 soil h-1) ,respectively. The alkaline phosphatase activity in soil was also high in Chamarajanagar soil of pH 8.1 (7.05 p-NP hydrolyzed μg-1 soil h-1), followed by Bangalore soil (5.29 μg p-NP hydrolyzed g-1 soil h-1) and Kodagu soil (3.85 μg p-NP hydrolyzed g-1 soil h-1).Keywords
Acetamiprid, Field Capacity, Enzyme Activities, Dehydrogenase, Urease, Phosphatase.- Effect of Integrated Nutrient Management Practices on Distribution of Nitrogen Fractions in Soil
Abstract Views :216 |
PDF Views:0
Authors
Affiliations
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, Navile, Shimoga (Karnataka), IN
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, Navile, Shimoga (Karnataka), IN