نتایج جستجو برای: x ray کریستالوگرافی
تعداد نتایج: 664830 فیلتر نتایج به سال:
clay minerals are considered the most important components of clastic reservoir rock evaluation studies. the shurijeh gas reservoir formation, represented by shaly sandstones of the late jurassic-early cretaceous age, is the main reservoir rock in the eastern kopet-dagh sedimentary basin, ne iran. in this study, x-ray diffraction (xrd), x-ray fluorescence (xrf), scanning electron microscopic (s...
Introduction: Crosstalk is a leakage of X-ray or light produced in a matrix of X-ray detectors or array of photodiodes in one element to other elements affecting on image contrast and spatial resolution. In this study, we assessed X-ray crosstalk in a computed tomography (CT) scanner with small detector elements to estimate the effect of various parameters such as X-ray tube voltage, detector e...
Introduction Radiation exposures from diagnostic medical examinations are generally low and are almost always justified by the benefits of accurate diagnosis of possible disease conditions. Therefore, entrance skin dose (ESD), body organ dose (BOD), and effective dose (ED) from adult patients undergoing routine thorax posterior-anterior (PA) and thorax right lateral (RLAT) were estimated in Uni...
Background: Panoramic imaging is one of the most common imaging methods in dentistry. Regarding the side-effects of ionizing radiation, it is necessary to survey different aspects and details of panoramic imaging. In this study, we compared the absorbed x-ray dose around two panoramic x-ray units: PM 2002 CC Proline (Planmeca, Helsinki, Finland) and Cranex Tome (Soredex, Helsinki, Finland).<br ...
در این کار تحقیقاتی، کمپلکس جدیدی حاوی نیکل (ii) و طلا (iii) از واکنش نیکل (ii) کلرید (nicl2.6h2o) و اسید آئوریک (haucl4. 3h2o) با لیگاند6،5،3،2- تترا (2-پیریدیل) پیرازین (tppz) در حلال dmf سنتز شد و کمپلکس [ni(tppz)2]. 2aucl4، با روش های آنالیز عنصری، طیف بینی ir،uv-vis ، نشر فلورسانس و پراش پرتو-x از تک بلور مورد شناسایی قرار گرفت. این کمپلکس در گروه فضایی pcnb از سیستم اورتو رومبیک متبلور می...
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