نتایج جستجو برای: cold adapted

تعداد نتایج: 181909  

2017
John E. Pool Dylan T. Braun Justin B. Lack

Drosophila melanogaster originated in tropical Africa before expanding into strikingly different temperate climates in Eurasia and beyond. Here, we find elevated cold tolerance in three distinct geographic regions: beyond the well-studied non-African case, we show that populations from the highlands of Ethiopia and South Africa have significantly increased cold tolerance as well. We observe gre...

Journal: :Virology 1977
S B Spring H F Maassab A P Kendal B R Murphy R M Chanock

The genetic properties of seven cold-adapted variants of influenza virus A were compared with those of nine Lfluorouracil (5-FU)-induced ts mutants. The 5-FU mutants had previously been placed into seven complementation-recombination groups; five of the seven cold-adapted variants also had the ts phenotype, and all five were shown to share the group 1 lesion. Three of the cold variants also had...

Journal: :Global change biology 2014
Robert J Warren Mark A Bradford

Successful species interactions require that both partners share a similar cue. For many species, spring warming acts as a shared signal to synchronize mutualist behaviors. Spring flowering plants and the ants that disperse their seeds respond to warming temperatures so that ants forage when plants drop seeds. However, where warm-adapted ants replace cold-adapted ants, changes in this timing mi...

Journal: :Vaccine 1990
G I Alexandrova H F Maassab A P Kendal T E Medvedeva A Y Egorov A I Klimov N J Cox

The adaptation of two influenza B strains (B/Leningrad/14/55 and B/Ann Arbor/1/66) to replication at 25 degrees C is described. Comparison of the two viruses indicates that both also exhibit temperature sensitive phenotypes, although that of the virus B/Leningrad/14/55 is less pronounced. When inoculated into ferrets both viruses replicate well in the trachea, but only the B/Leningrad/14/55 col...

Journal: :British journal of anaesthesia 1976
J A Reitan S T Ainslie R W Martucci M L Illeman

The effect of cold adaptation at 4 degrees C on cyclopropane MAC was studied in 10 Wistar rats over a 16-week period. Compared with a similar control group (normally adapted), there was a significant decrease in weight gain and a significant increase in anaesthetic requirement in the cold-adapted rats.

Journal: :Journal of Microbiology, Epidemiology and Immunobiology 2022

Introduction. The emergence of new epidemiologically significant variants SARS-CoV-2 has shifted emphasis to development a live vaccine, which would be able provide protection against wide range antigenic the virus. aim study was obtain attenuated through cold adaptation and their biological characterization.Materials methods. Dubrovka laboratory strain its were cultured on Vero Calu-3 cells. v...

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