نتایج جستجو برای: 42 c and
تعداد نتایج: 16979046 فیلتر نتایج به سال:
Background: Reported concentrations of amyloid(1– 42) (A 42) and tau in cerebrospinal fluid (CSF) differ among reports. We investigated the effects of storage temperature, repeated freeze/thaw cycles, and centrifugation on the concentrations of A 42 and tau in CSF. Methods: Stability of samples stored at 80 °C was determined by use of an accelerated stability testing protocol according to the A...
In this study, the effects of four different temperatures on sporulation and development 6 Bacillus species, 2 native 4 reference were investigated. The SDS PAGE analysis emerged that two proteins, 40 39 kilodalton (kDa), produced by sphaericus ATCC 2362 after 24 48, respectively hours at 48°C, local isolate 48 42°C 31 48°C. Additionally firmus (ATCC 14573) a kDa protein 52°C thuringiensis var....
abstract this study investigates the teachers’ correction of students’ spoken errors of linguistic forms in efl classes, aiming at (a) examining the relationship between the learners’ proficiency level and the provision of corrective feedback types, (b) exploring the extent to which teachers’ use of different corrective feedback types is related to the immediate types of context in which err...
chapter one is devoted to a moderate discussion on preliminaries, according to our requirements. chapter two which is based on our work in (24) is devoted introducting weighted semigroups (s, w), and studying some famous function spaces on them, especially the relations between go (s, w) and other function speces are invesigated. in fact this chapter is a complement to (32). one of the main fea...
abstract the present study was conducted to examine the effect of proficiency on students interaction while carrying out the grammar-based task(s) in collaboration. in particular, the study examines whether the level of proficiency affects the learners’ focus of attention to grammatical and lexical features. the study takes a further step and examines whether there is any difference in the use...
section{introduction} the concept of {sl cartan geometry} appeared at the beginning of the twentieth century, when {e}lie cartan was working on the so-called {sl equivalence problem}, the aim of which is to determine whether two given geometric structures can be mapped bijectively onto each other by some diffeomorphism. this problem can be considered in many different contexts, such as ...
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