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中南大学学报:英文版 2023年第8期30卷 2642-2656页

作者： Sohail REHMAN Syed Inayat ali SHAH HASHIM Sana Ben MOUSSA School of Materials Sciences Georgia Institute of TechnologyAtlanta 30318GeorgiaUSA Department of Mathematics Islamia College PeshawarPeshawarPakistan Department of Mathematics&Statistics The University of HaripurHaripur 22620Pakistan Faculty of Science and Arts Mohail AsserKing Khalid UniversitySaudi Arabia

利用因热源作用而收缩和膨胀的导管研究一阶化学反应和热辐射对幂律Carreau流体热质传输的影响。考虑了以热辐射形式产生热量的流体流动的体积热源和非线性热辐射。采用基于射击简单算法的RK-4方法对径向模式下的质量、动量、能量和物... 详细信息

利用因热源作用而收缩和膨胀的导管研究一阶化学反应和热辐射对幂律Carreau流体热质传输的影响。考虑了以热辐射形式产生热量的流体流动的体积热源和非线性热辐射。采用基于射击简单算法的RK-4方法对径向模式下的质量、动量、能量和物种浓度等基本守恒方程进行了重构和数值求解。考虑粒子的布朗性和热泳性,纳米粒子存在的模型是现象模型。将动量方程与扩展Jaffrey-Hamel问题的Carreau模型组合在一起。不同幂律指数对流体摩擦传热、传热量和传质的影响主要表现在流变性能上,说明剪切增稠型流体比剪切减薄型流体更有效。热传输率在热源处最大,在幂指数最大化时最小。这些研究可能有助于开发一种物理上合理的方法,用于系统化评估收缩/扩张通道中的流体流动和能量使用。

关键词：热传导热辐射发热 Jaffrey-Hamel流幂律Carreau流体数值结果

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Population survey and conservation assessment of the globally threatened cheer pheasant(Catreus wallichi) in Jhelum Valley, Azad kashmir, Pakistan

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Zoological Research 2014年第4期35卷 338-345页

作者： Muhammad Naeem AWAN Hassan ali David Charles LEE WWF Pakistan Regional Office Azad Kashmir Muzaffarabad Pakistan WWF Pakistan Feroze Pur Road Lahore Pakistan School of Applied Sciences the University of South Wales Pontypridd UK

The cheer pheasant Catreus wallichi is a globally threatened species that inhabits the western Himalayas. Though it is well established that the species is threatened and its numbers declining, updated definitive estimates are lacking, so in 2011, we conducted a survey to assess the density, population size, and threats to the species in Jhelum valley, Azad kashmir, which holds the largest known population of cheer pheasants in Pakistan. We conducted dawn call count surveys at 17 points clustered in three survey zones of the valley, 11 of which had earlier been used for a 2002-2003 survey of the birds. Over the course of our survey, 113 birds were recorded. Mean density of cheer pheasant in the valley was estimated at 11.8±6.47 pairs per km2, with significant differences in terms of both counts and estimated density of cheer were significantly different across the three survey zones, with the highest in the Chinari region and the lowest, that is the area with no recorded sightings of the pheasants, in Gari Doppata. The total breeding population of cheer pheasants is estimated to be some 2 490 pairs, though this does not consider the actual area of occupancy in the study area. On the whole, more cheer pheasants were recorded in this survey than from the same points in 2002-2003, indicating some success in population growth. Unfortunately, increasing human settlement, fires, livestock grazing, hunting, and the collection of non-timber forest products continue to threaten the population of cheer in the Jhelum valley. To mitigate these potential impacts, some degree of site protection should be required for the conservation of cheer pheasants in Pakistan, and more effective monitoring of the species is clearly needed.

关键词：巴基斯坦山谷人口调查密度估计雉考核养护濒危物种

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Antioxidants vitamin E and C attenuate hepatic fibrosis in biliary-obstructed rats

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World Journal of Gastroenterology 2006年第42期12卷 6835-6841页

作者： ali Riza Soylu Nurettin Aydogdu Umit Nusret Basaran Semsi Altaner Orhan Tarcin Nursal Gedik Hasan Umit Ahmet Tezel Gulbin Dokmeci Huseyin Baloglu Mevlut Ture Kemal Kutlu Kadir Kaymak Division of Gastroenterology Trakya University Edirne Turkey Department of Physiology Trakya University Edirne Turkey Department of Pediatric Surgery Trakya University Edirne Turkey Department of Pathology Trakya University Edirne Turkey Division of Gastroenterology Gumussuyu Military Hospital Istanbul Turkey Department of Biochemistry Kas?mpasa Naval Hospital Istanbul Turkey Department of Pathology Haydarpasa GATA/ Education Hospital Istanbul Turkey Department of Biostatistics Trakya University Edirne Turkey

AIM: To investigate whether antioxidants vitamin E and C can retard development of hepatic fibrosis in the bili- ary-obstructed rats. METHODS: Fifty Wistar albino rats were randomly as- signed to 5 groups (10 rats in each). Bile duct was liga- ted in 40 rats and they were treated as follows: group vitC, vitamin C 10 mg/kg sc daily; group vitE, vitamin E 15 mg/kg sc daily; group vitEC, both of the vitamins; bile duct-ligated (BDL, control) group, physiological saline sc. The fifth group was assigned to sham operation. At the end of fourth week, the rats were decapitated, and hepatic tissue biochemical collagen content and collagen surface area were measured. Hepatic tissue specimens were histopathologically evaluated according to Scheuer system. Serum hyaluronate levels were measured by ELISA method. RESULTS: Despite being higher than sham group, he- patic collagen level was significantly decreased in each of the vitC, vitE and vitEC groups (32.7 ± 1.2, 33.8 ± 2.9, 36.7 ± 0.5 μg collagen/mg protein, respectively) compared to BDL (48.3 ± 0.6 mg collagen/g protein) (P < 0.001 for each vitamin group). Each isolated vitamin C, isolated vitamin E and combined vitamin E/C supp-lementation prevented the increase in hepatic collagen surface density (7.0% ± 1.1%, 6.2% ± 1.7%, 12.3% ± 2.0%, respectively) compared to BDL (17.4% ± 5.6%) (P < 0.05 for each). The same beneficial effect of vitamin C, vitamin E and combined vitamin E/C treatment was also observed on the decrease of serum hyaluronate levels compared to BDL group (P < 0.001). The relative liver and spleen weights, serum transaminases, cholestatic enzymes, bilirubins and histopathological inflammation scores were not different between the antioxidant treat- ment groups and the control. However, fibrosis staging scores were obviously reduced only in the vitamin E/C combination group (vit EC: 2.4 ± 0.8 vs BDL: 3.1 ± 0.7; P < 0.05). CONCLUSION: Each antioxidant vitamin E, vitamin C and their combination retard hepatic fib

关键词：抗氧化剂维生素E 肝纤维化肝阻塞

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