نتایج جستجو برای: ultrasound time
تعداد نتایج: 1985327 فیلتر نتایج به سال:
quantum dots of cds with hexagonal phase were prepared at relatively low temperature (60 oc) and short time by micro-emulsion (o/w) under ultrasound. this study was focused on the particle size distribution and the growth kinetics. the particle size distribution obtained from the optical absorption edge. it was relatively symmetrical with sonication time. in addition, an agreement was observed ...
Background: Identifying risk factors for conversion to open surgery laparoscopic cholecystectomy and factors are difficult to predict cholecystectomy surgery is required. The aim of this study was to evaluate the findings of preoperative ultrasound in predicting the length of laparoscopic cholecystectomy surgery. Methods: The present study was performed cross-sectional on 122 patients who unde...
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