Christopher Chetsanga

Christopher J. Chetsanga (an haife shi a shekara ta 1935 a Murehwa, Rhodesia) fitaccen masanin kimiyar kasar Zimbabwe ne wanda memba ne a Kwalejin Kimiyya ta Afirka da Cibiyar Kimiyya ta Duniya.AAS. "Chetsanga, J. Christophe, Prof." , Fellow of AAS since 1986; Biochemistry and Molecular Biology, Nairobi, unknown. Retrieved on 28 August 2014.   Ya gano enzymes guda biyu da ke cikin gyaran DNA. Ya kuma riƙe muƙaman gudanarwa na ilimi daban-daban kamar Mataimakin Shugaban jami'a, Darakta da Dean.

 Tarihin Rayuwa 
An haifi Chetsanga a Murewa, Zimbabwe a ranar 22 ga watan Agusta 1935,  kuma ya yi baftisma a shekarar 1948. A lokacin ƙuruciyarsa, ya yi karatu a Nhowe Mission, kuma ya ci gaba da karatu a Jami'ar California, Berkeley inda ya sami BSc a shekara ta 1965. Chetsanga kuma yayi karatu na wani lokaci a Jami'ar Pepperdine.  A cikin shekarar 1969, ya sami MSc da PhD a fannin ilimin sunadarai  da ilimin halittu daga Jami'ar Toronto  kafin ya zama post-doctoral fellow na biyu a Jami'ar Harvard tsakanin shekarun 1969 da 1972.  Tsakanin shekarun 1972 zuwa 1983 ya zama Farfesa a Jami'ar Michigan, sannan a shekara ta 1983 ya tafi ya zama babban malami a Biochemistry na Jami'ar Zimbabwe.  A cikin shekarar 1990, Shugaba Robert Mugabe ya ba shi lambar yabo ta shugaban ƙasa don ba da gudummawa mai mahimmanci ga kimiyya da fasaha.  An  kuma ba shi lambar yabo ta Tauraron Zimbabwe.  A halin yanzu shi ne mataimakin shugaban jami'ar Zimbabwe Ezekiel Guti. 

A shekara ta 2004, lokacin da aka kafa Kwalejin Kimiyya ta Zimbabwe, an naɗa Chetsanga a matsayin shugaban makarantar na farko.  Chetsanga ya ba da shawarar yin amfani da hanyoyin samar da abinci da aka gyara a matsayin mafita mai yuwuwar matsalar karancin abinci a Afirka a cikin shekarar 2020.

 Nasarorin Kimiyya 
Chetsanga ya gano enzymes guda biyu da ke cikin gyaran (repair) DNA da ya lalace: na farko, foramidopyrimidine DNA glycosylase, wanda ke cire 7-methylguanine da ya lalace daga DNA (1979), da na biyu, purine imidazole-ring cyclase, wanda ya sake rufe imidazole zobba na guanin dan adenine lalacewa ta x-irradiation (1985). 

A cewar Chetsanga, binciken da ya mayar da hankali a cikin aikinsa na kimiyya ya kasance akan DNA da RNA tsarin da cikakkun bayanai na aiki kamar yadda suke da alaƙa da ƙwayar salula da ci gaban cuta.

 Zaɓaɓɓun wallafe-wallafe 

  C. J. Chetsanga; V. Boyd; L. Peterson; K. Rushlow (1 January 1975). "Single-stranded regions in DNA of old mice" (PDF). Nature. 253 (5487): 130–131. doi:10.1038/253130A0. ISSN 1476-4687. PMID 1110761. Wikidata Q59071826.
  C. J. Chetsanga; Tomas Lindahl (10 August 1979). "Release of 7-methylguanine residues whose imidazole rings have been opened from damaged DNA by a DNA glycosylase from Escherichia coli". Nucleic Acids Research. 6 (11): 3673–84. doi:10.1093/NAR/6.11.3673. ISSN 0305-1048. PMC 327965. PMID 386277. Wikidata Q24632415.
  C J Chetsanga; C Grigorian (February 1985). "In situ enzymatic reclosure of opened imidazole rings of purines in DNA damaged by gamma-irradiation". Proceedings of the National Academy of Sciences of the United States of America. 82 (3): 633–7. Bibcode:1985PNAS...82..633C. doi:10.1073/PNAS.82.3.633. ISSN 0027-8424. PMC 397099. PMID 3856219. Wikidata Q24568209.

 Manazarta 

Category:Rayayyun mutane
Category:Haihuwan 1935