نتایج جستجو برای: مواد FCC
تعداد نتایج: 94028 فیلتر نتایج به سال:
فرایند شکست کاتالیستی یکی از مهمترین فرآیندهای شکستن مولکولهای نفتی در جهان است که مواد سنگین و کمارزش نفتی را به مواد سبکتر و با ارزشتر تبدیل میکند. کاتالیست نقش بسیار مهمی در جهتدهی فرایند شکست کاتالیستی بستر سیال (FCC) ایفا میکند و کاتالیستهایFCC/RFCC یکی از مهمترین و پیچیدهترین کاتالیستهای صنایع پالایشگاهی هستند. این کاتالیستها میتوانند جهت و مسیر واکنش شکست را تعیین کنند. با ...
PURPOSE Factors that support self-efficacy in family-centered care (FCC) must be understood in order to foster FCC in trainees. Using social cognitive theory, the authors examined (1) how three supportive experiences (observing role models, practicing for mastery, and receiving feedback) influence self-efficacy with FCC during rounds and (2) whether the influence of these supportive experiences...
Objective: To determine whether the distribution of Fcc receptor IIa, IIIa, and IIIb polymorphisms confers a risk factor for disease susceptibility, and correlates with the clinical characteristics and serological parameters of patients with SLE in Taiwan. Methods: Genotyping of Fcc receptors IIa H/R131, IIIa F/ V158, and IIIb NA1/NA2 was performed in 302 patients with SLE and 311 healthy blood...
We address crystal nucleation and fcc-bcc phase selection in alloys using a multiphase field model that relies on Ginzburg-Landau free energies of the liquid-fcc, liquid-bcc, and fcc-bcc subsystems, and determine the properties of the nuclei as a function of composition, temperature, and structure. With a realistic choice for the free energy of the fcc-bcc interface, the model predicts well the...
Cadence selection affects metabolic responses during cycling and subsequent running time to fatigue.
OBJECTIVES To investigate the effect of cadence selection during the final minutes of cycling on metabolic responses, stride pattern, and subsequent running time to fatigue. METHODS Eight triathletes performed, in a laboratory setting, two incremental tests (running and cycling) to determine peak oxygen uptake (VO2PEAK) and the lactate threshold (LT), and three cycle-run combinations. During ...
Calculations of the work required to transform between bcc and fcc phases yield a high-precision bcc-fcc transition line for monodisperse point Yukawa (screened-Coulomb) systems. Our results agree qualitatively but not quantitatively with recently published simulations and phenomenological criteria for the bcc-fcc transition. In particular, the bcc-fcc-fluid triple point lies at a higher invers...
Current article describes application of zeolites in fluid catalytic cracking (FCC). The use of several zeolitic additives for the production light olefins and reduction of pollutants is described. Application of zeolites as fluid catalytic cracking (FCC) catalysts and additives due to the presence of active acid sites in the zeolite framework increase the formation of desired cracking product...
PURPOSE To evaluate the relationship between visual function and retinal nerve fiber layer (RNFL) measurements obtained with scanning laser polarimetry with variable corneal compensation (SLP-VCC) and optical coherence tomography (OCT). DESIGN Cross-sectional analysis of normal and glaucomatous eyes in a tertiary care academic referral practice. METHODS A commercial GDx nerve fiber analyzer...
تصویربرداری مقطعنگاری نوترونی یکی از کاربردهای مدرن رآکتورهای تحقیقاتی در سرتاسر جهان بهشمار میرود. تلفیق قابلیت نمایش سهبعدی با ویژگیهای منحصر به فرد برهمکنش نوترون مواد، میتواند اطلاعات بسیار ارزشمندی ساختار داخلی مواد و تجهیزات را اختیار محققین قرار دهد. این تحقیق، تأثیر هندسه دادهبرداری تجربی روش بازسازی تصویر بر کیفیت تصاویر سامانه رآکتور تهران براساس شاخص وضوح میزان تولید نویز مو...
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