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تعداد نتایج: 1907965 فیلتر نتایج به سال:
For designing a complex vector that has the advantages of both polyethylenimine (PEI) and chitosan for gene delivery, a PEI/chitosan/DNA complex was constructed at various N/P ratios (the ratios of moles of the amine groups of cationic polymers to those of the phosphate ones of DNA) and both the cytotoxicity and the transfection efficiency of the vector were evaluated. The results demonstrated ...
abstract the current research tried to examine the impact of multiple intelligence (mi) and its components on multiple choice (mc) and open ended (oe) reading comprehension tests. ninety six students of high school in grade four took part in this study. to collect data, participants completed multiple intelligence (mi) questionnaires along with a multiple choice (mc) and open ended (oe) forms ...
abstract this study was carried out to compare disinfecting effects of nanosilver with other feed disinfectants on layer hen performance, immune system, gastrointestinal microflora and intestinal morphology. total of 90 layers (lsl) were divided into five groups consisting: 1-control, 2- formalin (200 ppm), 3- formaycin (200 ppm), 4- nanosilver in drinking water (7.5 ppm) and 5-nanosilver in f...
Abstract Study question Does an abnormal Sperm DNA Fragmentation Index significantly impact clinical outcomes in patients undergoing Assisted Reproduction with ICSI using donor oocytes? Summary answer No statistical difference was seen pregnancy or miscarriage rates between high low fragmentation indexes oocyte donation cycles intracytoplasmic sperm injection. What is known already High levels ...
Abstract Study question Are fresh human sperm samples affected by different gravitational conditions than on Earth? Summary answer Motility and vitality of are significantly decreased under microgravity obtained parabolic flight. What is known already Microgravity effects the male reproductive system have mainly been studied in animal model with diverse results discouraging extrapolation humans...
Transgenic Escherichia coli expressing pyrroloquinoline-quinone (PQQ) synthase gene from Deinococcus radiodurans showed superior survival during Rose Bengal induced oxidative stress. Such cells showed significantly low levels of protein carbonylation as compared to non-transgenic control. In vitro, PQQ reacted with reactive oxygen species with rate constants comparable to other well known antio...
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