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RISS 인기검색어
- 검색키워드
- 저자 : ( S. Ushakumary ) (검색결과 3 건)
- 무료
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Kannan, Thandavan Arthanari,Ramesh, Geetha,Ushakumary, S.,Dhinakarraj, Gopalan,Vairamuthu, Subbiah Korean Society of Animal Science and Technology 2015 한국축산학회지 Vol.57 No.10
The present study was aimed to study the light and electron microscopic studies of thymic Hassall's corpuscles was done in various age groups of Nandanam Chicken ranging from day-old to forty weeks. Hassall's corpuscles are special, unique structures present in thymic medulla and also in the cortex of all the age groups of Nandanam chicken (from hatch to forty weeks) in the present study. Size of the Hassall's corpuscles in the medulla is larger than the ones present in the cortical region of thymus. The Hassall's corpuscles are made up of structureless eosinophilic mass surrounded by concentrically arranged reticuloepithelial cells. Under electron microscope, the Hassall's corpuscles were composed of reticuloepithelial cells interconnected by many desmosomes. The epithelial cells had abundance of cytoplasmic fibrils and desmosomes with few mitochondria and ribosomes. The nucleus was oval or round which was slightly indented. The centre of the Hassall's corpuscles was appeared either solid or cystic. The cystic corpuscles had cell debris within the cyst lumen.
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( Thandavan Arthanari Kannan ),( Geetha Ramesh ),( S. Ushakumary ),( Gopalan Dhinakarraj ),( Subbiah Vairamuthu ) 한국동물자원과학회(구 한국축산학회) 2015 한국축산학회지 Vol.57 No.30
The present study was aimed to study the light and electron microscopic studies of thymic Hassall``s corpuscles was done in various age groups of Nandanam Chicken ranging from day-old to forty weeks. Hassall``s corpuscles are special, unique structures present in thymic medulla and also in the cortex of all the age groups of Nandanam chicken (from hatch to forty weeks) in the present study. Size of the Hassall``s corpuscles in the medulla is larger than the ones present in the cortical region of thymus. The Hassall``s corpuscles are made up of structureless eosinophilic mass surrounded by concentrically arranged reticuloepithelial cells. Under electron microscope, the Hassall``s corpuscles were composed of reticuloepithelial cells interconnected by many desmosomes. The epithelial cells had abundance of cytoplasmic fibrils and desmosomes with few mitochondria and ribosomes. The nucleus was oval or round which was slightly indented. The centre of the Hassall``s corpuscles was appeared either solid or cystic. The cystic corpuscles had cell debris within the cyst lumen.
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Namitha Murali,V. P. Mini,S. Ushakumari 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.4
Among electric vehicles, electric three-wheelers are mostly used by the general public for their daily transportation. Hence,it is very important to provide bulk production of electric three-wheelers with better features and lower cost. These days,brushless direct current motors are being replaced with permanent magnet synchronous motors because of their high torqueproduction at low speeds and high efficiency. For the drive train control part of a permanent magnet synchronous motordrive, a field-oriented controller is better because of its independent torque and speed control. This controller provides two modes of operation: torque mode and speed mode. Currently, most researchers are concentrating on the speed mode of field-oriented controllers. However, in a real electric vehicle, torque mode is necessary to drive in any terrain. In this paper, the field-oriented control-based torque mode operation of a permanent magnet synchronous motor drive for an electric three-wheeler application is discussed and validated. Performance analyses of the two modes of operation and experimental validation of the torque mode are carried out. The hardware development of an electric three-wheeler with the torque mode of a field-oriented controller based permanent magnet synchronous motor drive is realized. Finally, paper is concluded with an economic analysis of the developed electric three-wheeler in comparison with an available internal combustion enginebased three-wheeler.
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