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Sakthivel, K.
- Influence of Phormidium tenue on Mangrove Seedlings
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Indian Forester, Vol 133, No 6 (2007), Pagination: 774-780Abstract
Of the seven species of cyanobacteria isolated from the mangrove sediments, Phormidium tenue exhibited a high ability of fixing nitrogen and hence, this species was tested as biofertilizer to mangrove seedlings of Avicennia marina (Forssk.) Vierh., Ceriops decandra (Griff.) Ding Hou and Aegiceras corniculatum (L.) Blanco. In A. marina, the treatment exhibited higher total biomass by 54.14%, no. of leaves by 48.19% and plant height by 36.83% than in control. In C. decandra, the cyanobacterial treatment enhanced the fresh weight of leaves by 83.12 %. In A. corniculatum, the treatment increased the plant height growth by 10.93 %. Thus the marine cyanobacterium, P. tenue has potential for a biofertilizer to mangroves.
- High Efficiency Four Quadrant Operation of Three Phase BLDC Motor with Load Variations
Abstract Views :170 |
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Authors
Affiliations
1 Kathir College of Engineering, IN
1 Kathir College of Engineering, IN
Source
Programmable Device Circuits and Systems, Vol 5, No 8 (2013), Pagination: 358-365Abstract
Brushless DC (BLDC) motor drives are becoming more popular in industrial, traction applications. This makes the control of BLDC motor in all the four quadrants very vital. This paper deals with the digital control of three phase BLDC motor. The motor is controlled in all the four quadrants without any loss of power; in fact energy is conserved during the regenerative period. The digital controller dsPIC30F4011, which is very ad- vantageous over other controllers, as it combines the calculation capability of Digital Signal Processor and controlling capability of PIC microcontroller, to achieve precise control.Keywords
BLDC Motor, Digital Control, dsPIC, Four Quad- Rants, Regenerative Braking.- Cross-Infectivity of Ralstonia solanacearum from Marigold Grown in Andaman Islands
Abstract Views :325 |
PDF Views:145
Authors
Affiliations
1 ICAR-Central Island Agricultural Research Institute, Port Blair - 744 101 Andaman & Nicobar Islands, IN
1 ICAR-Central Island Agricultural Research Institute, Port Blair - 744 101 Andaman & Nicobar Islands, IN
Source
Journal of Horticultural Sciences, Vol 11, No 2 (2016), Pagination: 179-181Abstract
Bacterial wilt disease, caused by Ralstonia solanacearum, is one of the major concerns for marigold cultivation in Andaman Islands. Cross-infectivity potential of the bacterial wilt pathogen, isolated from marigold, was tested in other common vegetable-hosts of the Island. Pathogen identity was confirmed by morphological identification and Biolog based phenotypic fingerprinting. Cross-infectivity tests revealed tomato to be the most susceptible among the three solanaceous hosts tested. Highest wilt incidence was observed in tomato and marigold (100%) plants, followed by 55.6% in brinjal and 22.3% in chilli, upon artificial soil inoculation. Our study enlightens pathogenic potential of the bacterial wilt pathogen in important vegetable crops of Andaman Islands and can help formulate suitable management practices for successful management of the pathogen.Keywords
Marigold, Ralstonia solanacearum, Bacterial Wilt, Andaman Islands.Full Text
References
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- Fegan, M. and Prior, P. 2005. How complex is the ‘Ralstonia solanacearum species complex’? In: Bacterial Wilt Disease and the Ralstonia solanacearum Species Complex. C. Allen, P. Prior and A.C. Hayward (eds.), American Phytopathological Society, St. Paul, MN, USA, pp. 449-461
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- Mondal, B., Bhattacharya, I. and Khatua, D.C. 2011. Crop and weed host of Ralstonia solanacearim in West Bengal. J. Crop & Weed, 7(2):195-199
- Palleroni, N.J., and Doudoroff, M. 1971. Phenotypic characterization and deoxyribonucleic acid homologies of Pseudomonas solanacearum. J. Bacteriol., 107:690-696
- Ramesh, R., Gauri, A.A. and Gaitonde, S. 2014. Genetic diversity of Ralstonia solanacearum infecting solanaceous vegetables from India reveals the existence of unknown or newer sequevars of Phylotype I strains. Eur. J. Pln. Pathol. Online publication. doi. 10.1007/s10658014-0487-5
- Yabuuchi, E., Kosako, Y., Yano, I., Hotta, H. and Nishiuchi, Y. 1995. Transfer of two Burkholderia and an Alcaligenes species to Ralstonia gen. nov: proposal of Ralstonia pickettii (Ralston, Palleroni and Doudoroff, 1973) comb. nov., Ralstonia solanacearum (Smith 1896) comb. nov. and Ralstonia eutropha (Davis 1969) comb. nov. Microbiol. Immunol., 39:897-904
- Self-esteem among Adolescents of Andaman and Nicobar Islands
Abstract Views :504 |
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Authors
Affiliations
1 Guest Faculty, Department of Psychology, Andaman College (ANCOL), Chakargaon, Port Blair, South Andaman, IN
1 Guest Faculty, Department of Psychology, Andaman College (ANCOL), Chakargaon, Port Blair, South Andaman, IN
Source
Indian Journal of Health and Wellbeing, Vol 13, No 1 (2022), Pagination: 18-21Abstract
Self-esteem is the overall change in an individual worth show in a negative or positive way about one's self (Minev et al., 2018). Its evolution starts at conception and is persistently altering as a result of life experiences. It is impossible to exaggerate the significance of self in the adolescent experience. The aim of this study is to look into the self- esteem of male and female undergraduate students in Andaman and Nicobar Islands. Data was gathered from 100 college students with mean age 18-19 years were taken as sample for the present study. Self-esteem Scale (Rosenberg, 1965) has been used to assess college students' self-esteem. The samples were selected Purposive Sample. t test were used. The results reveal a significant difference between male and female among college students.Keywords
self-esteem, adolescence, and gender differencesReferences
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- Damota, M. D., Ibrahim, E.H., & Woldemariam, H. H. (2019). The relationship between self-esteem and academic achievement among Addis Ababa university undergraduate psychology students. Journal of Education and Practice, 6(1), ISSN 2222-1735.
- Joshi, S., & Srivastava, R. (2009). Self-esteem and academic achievement of adolescents. Journal of the Indian Academy of Applied Psychology, 35(Special Issue), 33-39.
- Khan, I. K., Mahmood, A., & Zaib, U. (2019). Interplay of self esteem with the academic achievements between male and female secondary school students. Journal of Human Behavior in the Social Environment, 29(8), ISSN:1091-1359. https://doi.org/10.1080/10911 359.2019.1611517.
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- Subon, F., Unin, N., & Sulaiman, H. (2019). Self-esteem and academic achievement: The relationship and gender differences of Malaysian University Undergraduates. IAFOR Journal of Psychology and the Behavioral Sciences, 6, 1.
- Sutar, S.V. (2020). A study of self-esteem among college students. Phonix International Journal for Psychology and Social Sciences, 4, 7-20. ISSN 2456-5180.
- Sadaat, M., Ghasemzadeh, A., & Soleimani, M. (2012). Self-esteem in Iranian university students and its relationship with academic achievement. Procedia Social and Behavioral Sciences, 37, 10-14.
- Veena, G. T., Vijetha, K., & Princia, R. D. (2018). Comparative study to assess the level of self-esteem and achievement motivation among adolescents in rural and urban pre university colleges, Mangaluru. Journal of Medical Science And Clinical Research, 6(10), 226-234.
- Vialle, W. J., Heaven, P. C. L., & Ciarrochi, J. V. (2005). The relationship between self esteem and academic achievement in high ability students. Evidence from the Wollongong youth study. Australasian Journal of Gifted Education, 14(2), 39-45.
- Phytoplasma on Sesame: Etiology, Insect Vectors, Molecular Characterization, Transmission and Integrated Management
Abstract Views :47 |
PDF Views:40
Authors
T. Boopathi
1,
M. Sujatha
1,
M. Santha Lakshmi Prasad
1,
P. Duraimurugan
1,
K. Sakthivel
1,
K. T. Ramya
1,
A. L. Rathnakumar
1
Affiliations
1 ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad 500 030, IN
1 ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad 500 030, IN
Source
Current Science, Vol 125, No 4 (2023), Pagination: 383-391Abstract
Sesame phyllody disease is of serious concern in many sesame-growing areas. It significantly diminishes crop production, especially in warm environments causing up to 80% yield loss. We observed various symptoms of phyllody disease, viz. flowery phyllody, virescence, flower bud proliferation, ovivipary and cracking of seed capsules. Orosius albicinctus (Distant) was identified as the vector of sesame phyllody. Sesame phyllody phytoplasma 16SrI strain sequences of India, Egypt and Thailand were associated in one group; 16SrII strains were grouped separately, comprising sequences from India, Iran, Taiwan, Turkey and Oman. 16SrIX stains of Iran (MW27256, KF774193 and MW272565) and Turkey (KC139791) sequences were clearly distinguished from the phylogenetic tree. This result clearly shows the presence of different sesame phyllody phytoplasma strains and diversity in the Indian subcontinent. Sesame phytoplasma was effectively transmitted to the healthy plants from infected plants of sesame through O. albicinctus, grafting and dodder. The most sustainable and viable alternative for managing sesame phyllody can be an integrated strategy by combining cultural, host plant resistance, biological, physical and chemical methods. Sesame phyllody has become a potential threat to sesame cultivation. Hence, it is necessary to take steps to reduce its further spread. In this article, extensive details on distribution, taxonomy, symptomatology, etiology, transmission, molecular characterization, genetic diversity, host plant resistance and management methods on phytoplasma infecting sesame are provided.Keywords
Host Plant Resistance, Insect Vectors, Molecular Characterization, Sesame Phyllody, Symptoms.Full Text
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