Differential effects of cisplatin and MNNG on dna mutants of Escherichia coli
نویسندگان
چکیده
منابع مشابه
the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance
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15 صفحه اولthe effects of time planning and task complexity on accuracy of narrative task performance
هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...
the effects of previewing and providing background knowledge on iranian university efl learners’ comprehension of literary and academic texts
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15 صفحه اولthe differential effects of debate and media analysis as relate to enhancing efl learners critical thinking ability and writing performances
critical thinking ability has an important role in education. accordingly, scholars around the world are searching for new ways for teaching and improving students critical thinking ability. in line with the studies in efl contexts supporting the positive relationship between critical thinking and writing performances, this study investigated the differential effects of halverson’s critical thi...
15 صفحه اولDNA ligase mutants of Escherichia coli.
A procedure is described for the isolation of Escherichia coli mutants with either excess or deficient DNA ligase activity. A mutant that overproduces DNA ligase supports the growth of ligase-defective (gene 30 mutant) T4 phages. Even T4 rII-gene 30 double mutants, which are able to grow in normal E. coli, cannot grow in cells deficient in DNA ligase. A functional DNA ligase, supplied either by...
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ژورنال
عنوان ژورنال: Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis
سال: 2005
ISSN: 0027-5107
DOI: 10.1016/j.mrfmmm.2005.06.030