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Yadav, Ashish
- Tea Mosquito Bug (Helopeltis theivora) and Mealy Bug (Paraputo theaecola)-New Threats to Large Cardamom
Authors
1 ICAR-Research Complex for NEH Region, Sikkim Centre, Tadong 737 102, IN
Source
Current Science, Vol 110, No 8 (2016), Pagination: 1390-1391Abstract
Large cardamom (Amomum subulatum), a member of the family Zingiberaceae under order Scitaminae, is the most important cash crop in the eastern Himalayan region including Sikkim and the Darjeeling hills in India, the eastern part of Nepal and southern Bhutan.- Performance Analysis of Single Cylinder 4s Diesel Engine Using Vegetable Oil Blended
Authors
1 Department of Mechanical Engineering, ShriRam College of Engineering and Management (SRCEM), Banmore, Madhya Pradesh, IN
Source
International Journal of Interdisciplinary Research, Vol 3, No 1 (2017), Pagination: 29-35Abstract
Over the last two decades there has been a tremendous increase in the number of automobiles and a corresponding increase in the fuel price. In this regard, alternative fuels like vegetable oils play a major role. Use of pure vegetable oil in diesel engines causes some problems due to their high viscosity compared with diesel fuel. To solve the problems due to high viscosity various techniques are used. One such technique is fuel blending. This paper investigated the performance parameters of dual vegetable oil blends (mixture of Mustard oil and Palm oil) with diesel on a stationary single cylinder, four stroke direct injection compression ignition engine. The blends of BB 10 (combination of Diesel 90% by volume, Mustard oil 5% by volume and Palm oil 5% by volume) and blends of BB 20 (combination of Diesel 80% by volume, Mustard oil 10% by volume and Palm oil 10% by volume) gave better brake thermal efficiency, lower total fuel consumption and lower brake specific fuel consumption than other blends (BB 30, BB 40 and BB 50).Keywords
Diesel Engine, Flash Point, Fire Point, Mustard Oil, Palm Oil, Performance Parameters, Specific Gravity.References
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- J. Nagi, S. K. Ahmed, and F. Nagi, “Palm biodiesel an alternative green renewable energy for the energy demands of the future,” International Conference on Construction and Building Technology (ICCBT 2008 - F - (07)), pp. 79-94, 2008.
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- Does Pestalotiopsis royenae Cause Leaf Streak of Large Cardamom?
Authors
1 ICAR-National Organic Farming Research Institute, (Formerly ICAR Research Complex for NEH Region, Sikkim Centre), Tadong, Gangtok 737 102, IN
Source
Current Science, Vol 114, No 10 (2018), Pagination: 2155-2160Abstract
Leaf streak caused by Pestalotiopsis royenae (Guba) Steyaert has been reported as a new disease of large cardamom (Amomum subulatum). It is characterized by rectangular spots running parallel to the veins. P. royenae was isolated onto potato dextrose agar from the infected portion of the plant. In the pathogenicity test, disease symptoms were not present on inoculated plant and on detached leaf in vitro after 20 days. During 2014–2016, a survey in various large cardamom plantations of Sikkim revealed the presence of tea mosquito bugs on the infected parts of A. subulatum. The spots did not show any growth. Different sized spots have been noticed on the infected leaf produced by different instars. At the initial stage, these symptoms appear on the young and tender leaves of large cardamom. Tea mosquito bugs were collected from the infested leaves and allowed to feed under controlled conditions, which produced similar type of leaf streak symptoms in large cardamom and also in other non-host crops like maize and turmeric. The results reveal that the cause of leaf streak is due to feeding injury of tea mosquito bugs and rule out P. royenae as a pathogen causing leaf streak disease symptoms. Pestalotiopsis sp. was also isolated as endophyte from large cardamom.Keywords
Helopeltis theivora, Large Cardamom, Leaf Streak, Pestalotiopsis royenae.References
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- Srivastava, L. S. and Verma, R. N., Leaf streak (C.O. Pestalotiopsis royenae) – a new disease of large cardamom from Sikkim. Curr. Sci., 1989, 58, 682–683.
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- Saju, K. A., Mech, S., Deka, T. N. and Biswas, A. K., In vitro evaluation of biocontrol agents, botanicals and fungicides against Pestalotiopsis sp. infecting large cardamom (Amomum subulatum Roxb.). J. Spices Aromat. Crops, 2011, 20, 89–92.
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- Kalita, H., Avasthe, R. K., Gopi, R., Yadav, A. and Singh, M., Tea mosquito bug (Helopeltis theivora) and mealy bug (Paraputo theaecola) – new threats to large cardamom. Curr. Sci., 2016, 110, 1390–1391.
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- Welding Distortion Assessment for Hydraulic Connections of Complex Assembly of Neutral Beam Accelerator Grid
Authors
1 Institute for Plasma Research, Gandhinagar, Gujarat, IN
Source
Indian Welding Journal, Vol 53, No 4 (2020), Pagination: 35-41Abstract
Negative Ion Neutral Beam (NB) accelerator grids, made up of Oxygen free copper are actively cooled and are connected to external hydraulic circuit by welded connection. Cooling pipes are of SS316L material and Grids are manufactured with the oxygen free material (CuOF), which are welded with the transition stubs provided of Inconel material. Grids have the very high tolerances (in the range of microns) in terms angles, flatness and positional accuracy of the features. The welding of cooling pipe assembly to the grid plate introduce distortion which can affect the achieved tolerances on the main functional area of the machined grids.
Considering the requirement of angles, flatness and the positional tolerances of gird plate and its features; the need arises to have the assessment of weld induced distortion on functional area of CuOF Plate. Additionally, it is also necessary to assess the direction of the stress propagation, considering the dissimilar weld and having the mass difference in the plate and pipe assembly. Various configurations have been assessed and the welding simulation was performed to study the distortion on the assembly.
Keywords
Welding Simulation, SYSWELD, Distortion, Optimization.References
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