منابع مشابه
Latent mutants in chemostats.
HE correlation of spontaneous mutation with active growth in cell culture Thas led in the past to a common tacit assumption that division is required for mutation, an assumption exposed by the expression of mutation rates as some function of division. A ready explanation was provided by the error (copy-error) hypothesis which views mutation as an error in gene duplication, and which predicts th...
متن کاملSelection of laboratory wild-type phenotype from natural isolates of Escherichia coli in chemostats.
We have followed, in glucose-limited chemostats, the evolution of natural isolates of Escherichia coli possessing maximal growth rates of 0.48-1.43 doublings/h. Under these conditions a rapid-growth phenotype similar to that of standard laboratory wild-type strains was selected so that after 280 generations all of the cultures were characterized by bacteria with maximum growth rates close to 1....
متن کاملMichael Malisoff’s Research on Chemostats
Chemostat models provide the foundation for much current research in bioengineering, ecology, and population biology [8]. In engineering, the chemostat is known as the continuous-stirred tank reactor. It is used to model the dynamics of interacting organisms in waste-water treatment plants, lakes and oceans, and in biomedical contexts. The basic mathematical model of the chemostat is a system o...
متن کاملBacterial growth and adaptation in microdroplet chemostats.
We describe herein microfluidic technology for manipulating and monitoring continuous growth of populations of bacteria. A system consisting of approximately ten input and output channels controls more than 100 microdroplet chemostats and enables the manipulation of chemical factors in each microchemostat independently over time. Herein, we characterize the dynamics of bacterial populations in ...
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در این تحقیق به مطالعه وجود انتخاب نامساعد(کژ گزینی) در بازار بیمه درمان تکمیلی ایران پرداخته شده است. داده های مورد نیاز توسط پرسشنامه و به روش نمونه گیری خوشه ای جمع آوری شده است. پرسشنامه ها در میان افراد شاغل ساکن شهر تهران توریع شد. در این تحقیق با استفاده از تخمین دو مدل لجستیک و به دست آوردن ضریب همبستگی میان تقاضای بیمه درمان تکمیلی و رخداد خسارت به بررسی موضوع مورد نظر پرداخته شده است....
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ژورنال
عنوان ژورنال: Microbiological Reviews
سال: 1983
ISSN: 0146-0749
DOI: 10.1128/mr.47.2.150-168.1983