نتایج جستجو برای: control and preventation
تعداد نتایج: 17001541 فیلتر نتایج به سال:
abstract biometric access control is an automatic system that intelligently provides the access of special actions to predefined individuals. it may use one or more unique features of humans, like fingerprint, iris, gesture, 2d and 3d face images. 2d face image is one of the important features with useful and reliable information for recognition of individuals and systems based on this ...
چکیده مورچهها با حمایت از شپشکها در مقابل دشمنان طبیعی، میتوانند برنامههای کنترل بیولوژیک آنها را مختل نمایند. طی سالهای 1389 و 1390 با نمونهبرداری از باغات مرکبات شهرستانهای ساری و بهشهر، فون و فراوانی نسبی مورچههایِ همراه با شپشکها مورد مطالعه قرار گرفت. همچنین، تاثیر تراکمهای مختلف کاست کارگر گونهی santschi lasius turcicus بر میزان تغذیه و فراسنجههای واکنش تابعی حشرات ماده و لا...
Tyrosinase catalyzes the oxidation of phenolic compounds to the corresponding quinines which are subsequently converted to melanin pigments. Loss of the hair shaft melanin is associated with decrease of tyrosinase activity in the bulb of melanocytes. Activators of tyrosinase with stimulatory effects on melanogenesis are beneficial for the preventation of hair whitening and treatment of hypopigm...
there is less published research about how teachers in efl contexts respond to students who are relatively less mature and less competent l2 writers. while writing researchers have examined various issues concerning peer and teacher response in writing-oriented classes, little research has centered on the effect of collaborative tasks particularly dictogloss on writing skills. output collaborat...
تاثیر منبع کنترل رفتار بر روی موفقیت تحصیلی زبان آموزان انگلیسی بندرت در ایران ارزیابی شده است. هدف این تحقیق ارزیابی رابطه بین منبع کنترل رفتار زبان آموزان انگلیسی و موفقیت آنها در مهارت های خواندن و نوشتن زبان انگلیسی است. محقق همچنین رابطه بین منبع کنترل رفتار و راهبردهای یادگیری زبان انگلیسی را در این تحقیق جستجو می کند. بدین منظور محقق ابتدا نسخه فارسی پرسشنامه منبع کنترل رفتار (duttweiler...
Cu2O nanoparticles (Cu2ONPs) with particle size of ~27.4 nm deposited on diatomite (Cu2ONPs/diatomite), a new low-cost material has been used to investigate growth inhibit, and bloom preventation cyanobacteria in eutrophic waters. Diatomite collected from natural mines was also the experiments. Microcystis aeruginosa strain originated Bac Lieu shrimp pond isolated cultured Z8 medium. Experiment...
A free radical-scavenging preparation (pollen extract) or the corresponding placebo was given to 50 volunteers over a period of 4 weeks to test the hypothesis that muscle soreness is associated with the generation of free radicals. The increase in malonyldialdehyde and lactate immediately after exercise both in blood and in muscle tissue was significantly lower after treatment with the scavengi...
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. ...
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