OALib Journal期刊

ISSN: 2333-9721



匹配条件: “Shengrong” ,找到相关结果约34条。
On the asymptotic independence of the sum and maximum of normal random variables
Shengrong Xie
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882659
Maxima with random indexes
Shengrong Xie
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882638
Sojourns of a type of Gaussian processes above high levelu
Shengrong Xie
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883089
The Five Elements of Th1-Th2 System
Shengrong Zou
Physics , 2008,
Abstract: The T helper (Th) phenotypes, Th1/Th2, are acquired upon interaction of a naive T helper cell and an antigen presenting cell (APC). Naive T helper cells may differentiate into either phenotype, and the actual outcome is determined by the density and avidity of the antigenic determinants presented by the APC, and the APCs inherent costimulatory properties. Until recently it was thought that differentiation is further affected by cytokines. In our work, We have specified aspects of T-cell cytokine networks using B method of software engineering. With this model, we are able to run verification with B-toolkit and allow us to compare the dynamic behavior of the model to actual experimental data from College of Animal Science and Veterinary Medicine. Here we present a Wu-Hsing model of Th1-Th2 system.
Five Balances in the Management of Rheumatoid Arthritis  [PDF]
Shengrong Zou
Journal of Biosciences and Medicines (JBM) , 2017, DOI: 10.4236/jbm.2017.59002
Abstract: Rheumatoid arthritis (RA) is the most common chronic autoimmune joint disease. The etiology of RA is complex, and then it is impossible to cure completely today and it should be individualized treatment. Immune system is complex. Existing statistical techniques based on reductionism cannot discover many relevant disease risk factors and complex interaction relationship. The disease network model based on complex network is important for the analysis and treatment of RA disease. In this Review, we have found five important layers of RA complex network and presented five balances regulating strategy in the management of RA. We have followed up one RA patient (wife of the author) for one year using this strategy, and the management effect is good. This Review argues RA is self-limiting to some extent, and good management with five balances regulating strategy would have positive significance, among which the balance between neuroendocrine system and immune system is the most important. During the day, glucocorticoid plays an important role in con-trolling inflammation, and human growth hormone plays an important role in eliminating inflammation during the slow-wave sleep at night. Five balances core concepts can shed light on the management of other causes of arthritis.
One-Pot Synthesis of Dimethyl Carbonate over Basic Zeolite Catalysts  [PDF]
Wenshuai Xu, Shengrong Ji, Wei Quan, Jianqiang Yu
Modern Research in Catalysis (MRC) , 2013, DOI: 10.4236/mrc.2013.22A004

One-pot synthesis of dimethyl carbonate (DMC) from methanol, propylene oxide (PO) and carbon dioxide has been investigated using the basic zeolites as catalysts. Among the zeolites studied, Beta showed the best catalytic performance for DMC production. That the desilication of zeolite structure resulted in a hierarchical porosity of Beta, leading to more amount of KOH can be loaded on the surface of zeolite and therefore enhancing the base strength of the catalyst was proposed to be the reason for improved catalytic performance.

Preparation of hydroxyapatite ceramic through centrifugal casting process using ultra-fine spherical particles as precursor and its decomposition at high temperatures
Yanjie Zhang,Jinjun Lu,Shengrong Yang
Journal of Advanced Ceramics , 2012, DOI: 10.1007/s40145-012-0006-0
Abstract: Ultra-fine hydroxyapatite (HAp) powder with a diameter of about 10 nm was used as precursor for preparation of HAp ceramic. The precursor hydroxyapatite was single phase and highly crystallized without any additional thermal treatment. Highly densified HAp ceramic was fabricated through centrifugal infiltration casting (CIC), followed by pressureless sintering. The relative densities of compacts prepared at 1100°C and 1200°C were 77.8% and 94.1%, respectively. SEM micrographs of HAp ceramic sintered at 1100°C showed a porous microstructure with a grain size of 1 μm. HAp ceramic fabricated at 1200°C revealed a dense microstructure with nano-sized spherical α-TCP distributed at grain boundaries and triple points. The mechanism of decomposition from HAp to α-TCP at 1200°C was discussed on the basis of SEM, XRD and FTIR results.
Effect of essential fatty acids on glucose-induced cytotoxicity to retinal vascular endothelial cells
Junhui Shen, Shengrong Shen, Undurti N Das, Guotong Xu
Lipids in Health and Disease , 2012, DOI: 10.1186/1476-511x-11-90
Abstract: RF/6A cells were treated with different concentrations of high glucose, α-linolenic acid and linoleic acid and Zn2+. The alterations in mitochondrial succinate dehydrogenase enzyme activity, cell membrane fluidity, reactive oxygen species generation, SOD enzyme and vascular endothelial growth factor (VEGF) secretion were evaluated.Studies showed that hyperglycemia-induced excess proliferation of retinal vascular endothelial cells can be abrogated by both linoleic acid (LA) and α-linolenic acid (ALA), while the saturated fatty acid, palmitic acid was ineffective. A dose–response study with ALA showed that the activity of the mitochondrial succinate dehydrogenase enzyme was suppressed at all concentrations of glucose tested to a significant degree. High glucose enhanced fluorescence polarization and microviscocity reverted to normal by treatment with Zn2+ and ALA. ALA was more potent that Zn2+. Increased level of high glucose caused slightly increased ROS generation that correlated with corresponding decrease in SOD activity. ALA suppressed ROS generation to a significant degree in a dose dependent fashion and raised SOD activity significantly. ALA suppressed high-glucose-induced VEGF secretion by RF/6A cells.These results suggest that EFAs such as ALA and LA may have beneficial action in the prevention of high glucose-induced cellular damage.
Apatite fission track dating evidence for tectonic movement of Yarlung Zangbo Thrust Zone
Wanming Yuan,Zengqian Hou,Shicheng Wang,Shengrong Li
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9173
Abstract: Fission track geological chronology is an effective method of study on tectonic movement of fault zone. Apatite fission track (AFT) dating analyses of 9-apatite and 4-zircon samples collected from Lhasa to Langkazi, ~70-km-long in SN provide an understanding of the age and the uplifting of both sides of the Yarlung Zangbo Thrust Zone (YZTZ) in this work. The AFT ages range from ~37 to 14 Ma, indicating the time of major tectono-thermal events, i.e. the continent-continent collision along the YZTZ. Based on the relationship between the AFT ages and the sample elevations, there were two tectonic active periods: ~37–20 Ma and 20–14 Ma. In the first period the tectonic event did not bring on differential uplifting. Rapid differential uplifting with rapid cooling, resulting from thrusting, took place in the second period. The vertical displacement was ~1020 m and total ~2.9 km of overburden has been removed from the present-day surface since cooling below ~100°C began. The maximum cooling and denudation occurred at a rate of ~7°C/ Ma and ~207 m/Ma respectively since ~14 Ma. The zircon fission track analysis demonstrates that the temperature of tectono-thermal events did not exceed 310°C.
Apatite fission track dating evidence on the tectonization of Gangdese block, south Qinghai-Tibetan Plateau
Wanming Yuan,Shicheng Wang,Shengrong Li,Zhiqiang Yang
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9057
Abstract: This work makes the quantitative constrain on tectonizations of the Gangdese block, south Qinghai-Tibetan Plateau. Apatite fission track (AFT) dating analyses of 15 samples collected across the Gangdese block show that the Gangdese block went through two periods of tectonizations, during ~37.2-18.5 Ma and 18.5-8.0 Ma in the south Gangdese block, and during ~47.6-5.3 Ma and 5.3-0 Ma in the middle Gangdese block. Different upliftings did not take place in the first period and rapid uplifting occurred in the late period. Meantime, there are some differences between the south and middle Gangdese block. Their uplifting rate is 180 m/Ma and 70 m/Ma respectively. The rapid uplifting time in the middle Gangdese block lagged behind the time in the south Gangdese block. It is Chala-Jiacuo-Riduo fault zone that is similar to the Yarlung Zangbo fault zone in control of the tectonization.

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