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Hari Krishan Jain was an Indian cytogeneticist and plant breeder, known for his contributions to the field of genetic recombination and the control of interchromosome level. He is a former chancellor of the Central Agricultural University, Imphal, a former director of the Indian Agriculture Research Institute and a recipient of honours such as Rafi Ahmed Kidwai Award, Borlaug Award and Om Prakash Bhasin Award. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 1966, for his contributions to biological sciences. He received the fourth highest Indian civilian honor, the Padma Shri, in 1981.
Ethylene (CH
2=CH
2) is an unsaturated hydrocarbon gas (alkene) acting as a naturally occurring plant hormone. It is the simplest alkene gas and is the first gas known to act as hormone. It acts at trace levels throughout the life of the plant by stimulating or regulating the ripening of fruit, the opening of flowers, the abscission (or shedding) of leaves and, in aquatic and semi-aquatic species, promoting the 'escape' from submergence by means of rapid elongation of stems or leaves. This escape response is particularly important in rice farming. Commercial fruit-ripening rooms use "catalytic generators" to make ethylene gas from a liquid supply of ethanol. Typically, a gassing level of 500 to 2,000 ppm is used, for 24 to 48 hours. Care must be taken to control carbon dioxide levels in ripening rooms when gassing, as high temperature ripening (20 °C; 68 °F) has been seen to produce CO2 levels of 10% in 24 hours.
References
- 1 2 Grierson, Donald (1972). The synthesis of ribosomal ribonucleic acid in developing primary leaves of Phaseolus aureus (PhD thesis). University of Edinburgh. hdl:1842/13956. OCLC 846263643. EThOS uk.bl.ethos.651825.
- ↑ "Professor Don Grierson". University of Nottingham. Archived from the original on 8 February 2012. Retrieved 31 December 2011.
- ↑ Anon (2017). "Greirson, Prof. Donald" . Who's Who (online Oxford University Press ed.). Oxford: A & C Black. doi:10.1093/ww/9780199540884.013.18183.(Subscription or UK public library membership required.)
- ↑ "Professor Don Grierson: Pro-Vice-Chancellor, Professor of Plant Physiology". nottingham.ac.uk. Archived from the original on 19 May 2007.
- ↑ Lalit M. Srivastava (27 August 2002). Plant Growth and Development: Hormones and Environment. Academic Press. pp. 238–. ISBN 978-0-08-051403-1 . Retrieved 24 April 2013.
- ↑ Anne Simon Moffat (November–December 1988). "Researchers Pursue "Anti-Sense" Technology in Quest for Novel Drugs and Agriproducts". Genetic Engineering and Biotech News.
- ↑ "A puree genius at his work". Times Higher Education. 17 July 1998. Retrieved 23 August 2010.
- ↑ Grierson, Donald; Smith, Harry (1973). "The Synthesis and Stability of Ribosomal RNA in Blue-Green Algae". European Journal of Biochemistry . 36 (1): 280–285. doi:10.1111/j.1432-1033.1973.tb02911.x. ISSN 0014-2956. PMID 4200178.
- ↑ Grierson, Donald (2018). "Harry Smith. 19 September 1935—9 February 2015". Biographical Memoirs of Fellows of the Royal Society . 64: 387–399. doi: 10.1098/rsbm.2017.0045 . ISSN 0080-4606.
- ↑ "The Queen's Birthday Honours - OBEs: A - K". BBC. 16 June 2000.
- ↑ "Four Professors Newly Elected as Chinese Academicians".
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