نتایج جستجو برای: سینتیک O‌C‌M

تعداد نتایج: 3591  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده فنی 1392

در این مطالعه، عملکرد واکنش‏های فرآیند تولید اتیلن از روش زوج شدن اکسایشی متان (ocm)، در یک راکتور بستر ثابت مدل‏سازی و شبیه‏سازی می‏شود. در این مدل، برهم‏کنش همزمان هیدرودینامیک جریان، سینتیک واکنش‏های شیمیایی و پدیده‏های انتقال جرم و حرارت با لحاظ عبارت پراکندگی محوری و شعاعی در نظر گرفته شده است. واکنش‏های انجام شده در این فرآیند شامل جذب متان و اکسیژن روی سطح کاتالیست، تولید رادیکال و دفع آ...

Journal: :Oper. Res. Lett. 2013
Denis Cornaz V. H. Nguyen

We show that the maximum degree of a graph G is equal to theminimum number of ocm sets covering G, where an ocm set is the vertex-disjoint union of elementary odd cycles and onematching, and a collection of ocm sets covers G if every edge is in the matching of an ocm set or in some odd cycle of at least two ocm sets. © 2013 Elsevier B.V. All rights reserved.

For more than three decades, Oxidative Coupling of Methane (OCM) process has been comprehensively investigated as an attractive alternative for the commercially available ethylene production technologies such as ethane and naphtha cracking. Developing a suitable catalyst and proper reactor feeding policy, reviewing and deploying the efficient methods in the separation and purification of the un...

2018
Eva Sipos Nikoletta Dobos David Rozsa Klara Fodor Gabor Olah Zsuzsanna Szabo Lorant Szekvolgyi Andrew V Schally Gabor Halmos

Introduction Uveal melanoma (UM) is the most common primary intraocular malignancy with very poor prognosis. Conventional chemotherapy only rarely prolongs the survival, therefore patients require novel treatment modalities. The discovery of specific receptors for hypothalamic hormones on cancer cells has led to the development of radiolabeled and cytotoxic hormone analogs. Materials and meth...

Journal: :Optics express 2012
Christophe Pache Noelia L Bocchio Arno Bouwens Martin Villiger Corinne Berclaz Joan Goulley Matthew I Gibson Christian Santschi Theo Lasser

We introduce photothermal optical lock-in Optical Coherence Microscopy (poli-OCM), a volumetric imaging technique, which combines the depth sectioning of OCM with the high sensitivity of photothermal microscopy while maintaining the fast acquisition speed inherent to OCM. We report on the detection of single 40 nm gold particles with a 0.5 μm lateral and 2 μm axial resolution over a 50 μm depth...

Journal: :Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association 2009
Elizabeth J Lindley Paul W Chamney Andreas Wuepper Helen Ingles James E Tattersall Eric J Will

BACKGROUND The availability of haemodialysis machines equipped with on-line clearance monitoring (OCM) allows frequent assessment of dialysis efficiency and adequacy without the need for blood samples. Accurate estimation of the urea distribution volume 'V' is required for Kt/V calculated from OCM to be consistent with conventional blood sample-based methods. METHODS Ten stable HD patients we...

Journal: :Cancer research 2010
Chao Zhou David W Cohen Yihong Wang Hsiang-Chieh Lee Amy E Mondelblatt Tsung-Han Tsai Aaron D Aguirre James G Fujimoto James L Connolly

Three-dimensional (3D) tissue imaging methods are expected to improve surgical management of cancer. In this study, we examined the feasibility of two 3D imaging technologies, optical coherence tomography (OCT) and optical coherence microscopy (OCM), to view human breast specimens based on intrinsic optical contrast. Specifically, we imaged 44 ex vivo breast specimens including 34 benign and 10...

Journal: :The American journal of surgical pathology 2000
P T Chandrasoma D M Lokuhetty T R Demeester C G Bremmer J H Peters S Oberg S Groshen

A series of 71 patients with multiple measured biopsies of the gastroesophageal junctional region permitting assessment of the presence and length of different glandular epithelial types is presented. All but nine of 53 patients in whom a 24-hour pH study was performed had abnormal reflux, suggesting that endoscopic recognition of an abnormal columnar mucosa at the gastroesophageal junction suf...

Journal: :Chest 1988
J Angel E Domingo R Serrat I Anivarro J Soler-Soler

The dynamic behavior of fixed LV outflow tract stenosis partly resembles that of OCM. To analyze their differences we studied basal and postextrasystolic (post-PVC) peak-to-peak LV aortic gradients, aortic systolic pressure, and pulse pressure in 14 OCM and in 36 pure VAS without two-dimensional echocardiographic findings of OCM. Fifteen mild VAS had basal gradients similar to those of OCM (39 ...

2003
Andrew Sturdy Christopher Grey

This essay introduces contributions to a special issue exploring alternative accounts of organizational change management (OCM). It begins with identifying why such alternatives are needed by pointing to core assumptions within OCM, including a practical and ontological prochange bias, managerialism and universalism. The alternatives to OCM are then framed in terms of the constructionism associ...

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