نتایج جستجو برای: grade organisms
تعداد نتایج: 259279 فیلتر نتایج به سال:
a new system is presented for the generation ofrecombinant bacillus subtilis strains without antibioticmarkers. this system is based on two plasmids constructed in escherichia coli. the first plasmid phm30contains an incomplete hisi gene, the last gene in thehistidine biosynthesis operon of b. subtilis and part ofthe genes yvca and yvcb of unkown function flankinghisi at the 3´-end. the spectin...
مقدمه: فرکتالها عبارتند از ساختارهای هندسی پیچیده. علم فرکتال که به بررسی این ساختارها می پردازد در سال 1975 ابداع گردید و امروزه نه تنها در علوم مهندسی بلکه در علوم پزشکی نیز جایگاه ویژه ای یافته است. فرکتال ها در تشخیص بیماری های استخوانی و مدل سازی ساختار استخوانها و تحلیل تغییرات ساختار آنها و تحلیل ریتم و ضربان قلب و تشخیص بیماری های قلبی کاربرد دارند. هرچند به نظر می رسد هرکجا که یک بی نظ...
A new system is presented for the generation of recombinant <span style="font-variant: normal; font-style: normal; font-family: Arial-ItalicMT; color: #231f20; font-size: 10pt...
i.p.s. hypergroups are canonical hypergroups such that$[forall(a,x),a+xni x]longrightarrow[a+x=x].$i.p.s. hypergroups were investigated in [1], [2], [3], [4] and it was proved thatif the order is less than 9, they are strongly canonical (see [13]). in this paperwe obtain the sequences of fuzzy sets and of join spaces determined (see [8])by all i.p.s. hypergroups of order seven. for the meaning ...
abstract this study is an attempt to determine the effect of nano- technology education on science lesson for fifth grade in primary school in the city of kermanshah. this research is experimental and is conducted in the from of pre-test and post- test for the control group. an achievement test was administered to determine the rate of learning in the students. the research is an applied one. ...
A potential food-grade cloning vector, pND919, was constructed and transformed into S. thermophilus ST3-1, a plasmid-free strain. The vector contains DNAs from two different food-approved organisms, Streptococcus thermophilus and Lactococcus lactis. The 5.0-kb pND919 is a derivative of the cloning vector pND918 (9.3 kb) and was constructed by deletion of the 4.3-kb region of pND918 which contai...
Calcareous sediments are located in temperate and tropical areas near offshore hydrocarbon industries and petrochemical reserves such as the Persian Gulf of Iran. These sediments have complicated physical properties which make them completely different from silicate soils. Carbonate sediments are mainly formed by the skeletal remains of marine organisms. Therefore, a wide variety of engineering...
Community science-generated biodiversity data can provide essential information for understanding species distributions, behaviors and conservation statuses. However, their utility be limited due to high uncertainty variability in quality, especially small taxonomically difficult organisms like fungi insects. One important set of community-generated that are increasingly used by scientists Rese...
علیرغم وجود تکنیکهای درمانی مختلف دندانهای چند ریشه با درگیری فورکیشن یکی از مشکلات درمانهای پریودنتال محسوب می شوند. در این مجموعه آناتومی ناحیه فورکیشن، دلایل درگیری فورکیشن طبقه بندی فورکیشن و درمانهای فورکیشن مورد بررسی قرار گرفته است. gtr پروگنوز درمان درگیری grade ii را بهبود بخشیده است، اگرچه همیشه پروگنوز مشخصی نداشته است. با پیشرفت تکنیکهای پریو و اثرات فاکتور رشد gtr ممکن است ...
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