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Search Results: 1 - 10 of 15231 matches for " Hongqi Ren "
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The Clinical Efficacy of Low-Dose Tacrolimus Combined with Tripterygium to Treat the Steroid-Resistant Nephrotic Syndrome  [PDF]
Hongqi Ren, Guofang Chen, Xuan Zhou, Yan Li, Qing Cai, Shujing Han, Rui Wang
Open Journal of Nephrology (OJNeph) , 2012, DOI: 10.4236/ojneph.2012.24016
Abstract: Objective: To observe the clinical efficacy and safety of low dose tacrolimus (TAC) combined with tripterygium (TW) in treatment of steroid resistant nephritic syndrome (SRNS). Method: The patients, who were diagnosed with mesangial proliferative glomerulonephritis (MesPGN) and focal segmental glomerulosclerosis (FSGS) by biopsy and failed to respond to a 3-month treatment with prednisone (1 mg/kg·d), were randomly divided into 2 groups (TAC + TW Group and TW Group). Initially TAC + TW group took TAC 0.05mg/(kg·d) 2 h after meal at 12 h interval. The plasma TAC level was examined after 3 days and was kept at 1.5 - 4 ng·ml; meanwhile, TW was given at 60 mg/d before meal. TW group only took TW (60 mg/d). The efficacy, adverse reactions and plasma TAC levels were observed in each group. Results: 1) Totally 20 SRNS patients completed the trial, 11 of TAC + TW Group and 9 of TW Group. There is no statistical difference between the two groups in terms of age, gender, duration since onset of the disease, blood pressure, 24 h UPQ, serum albumin, creatinine, cholesterol, triglyceride, FBG, kidney pathological categories, time of taking prednisone etc.; 2) Urine protein started to decrease after 1 month treatment in both of TAC + TW and TW groups. By the 12th month of treatment, TAC + TW group showed 8 cases of complete remission (72.7%), 2 cases of partial remission (18.2%) and 1 case of no improvement (9.1%), while those of TW groups were 2 (22.2%), 4 (44.5%) and 3 (33.3%), respectively; 3) With treatment, the TAC + TW Group patients’ plasma protein was significantly higher than that of pretreatment stage and recovered to normal level after 6 month of treatment. However, there was no significant plasma protein increase in TW Group. No obvious changes were observed on serum creatinine level of patients of both the two groups; 4) The incidence of adverse reactions was not significantly different between the two groups. Conclusion: TAC + TW reduced proteinuria of SRNS patients, increased clinical remission rate and was tolerant to SRNS patients. We conclude that TAC + TW treatment is an effective way to treat patients with SRNS.
The Relationship between Carotid Atherosclerosis, Inflammatory Cytokines, and Oxidative Stress in Middle-Aged and Elderly Hemodialysis Patients
Hongqi Ren,Xuan Zhou,Zhiyong Luan,Xiaomei Luo,Shujing Han,Qing Cai,Wang Rui,Yan Li
International Journal of Nephrology , 2013, DOI: 10.1155/2013/835465
Abstract: Objective. To identify the relationship between microinflammation, oxidative stress, and carotid arterial stiffness in hemodialysis patients. Methods. The CAS β and PWV obtained by ultrasound technology were used to assess carotid arterial stiffness. We divided the patients into either the CAS group or the non-CAS group based on the presence or absence of CAS. The parameters of ALB, Ca, P, TC, HDL, LDL, TG, glucose, creatinine, and hs-CRP levels were routinely tested in both groups of patients. The levels of TNF-α, IL-6, and 8-isoprostane F2α were measured by ELISA. Results. A total of 42 patients were enrolled in the CAS group and 20 patients were enrolled in the non-CAS group. No significant differences between the CAS group and the non-CAS group were observed with respect to age, dialysis duration, DBP, BUN, Cr, TC, TG, HDL, LDL, and Hb. However, SBP , pulse pressure, and 8-isoprostane levels of the CAS group were higher than those of the non-CAS group. The hs-CRP, TNF-α, and IL-6 levels were elevated in both groups but showed no significant differences. Conclusions. Maintenance of hemodialysis patients exhibits a microinflammatory state that may lead to atherosclerosis. The roles of hypertension and oxidative stress may be more important. 1. Introduction Atherosclerosis is an independent predictor of cardiovascular disease (CVD) related to patients with end-stage renal disease (ESRD). Numerous factors are involved in atherosclerosis for ESRD patients, some of which are reversible. Increasing evidence has demonstrated that atherosclerosis is a chronic microinflammatory disease [1–4]. Renal excretion dysfunction is common for maintenance with hemodialysis (MHD) patients. Toxins and cytokines accumulate in the body. The imbalance between the antioxygen free radical system and the oxygen free radical production system causes peroxidative damage and lipid peroxidative injury. Glycation end products and advanced oxidation protein products accumulate in the body, bind to specific monocyte-macrophage cell surface receptors, and stimulate vast numbers of adhesion molecules. Nuclear factor κB (NF-κB) is also stimulated resulting in increased secretion of inflammatory cytokines such as interleukin (IL) 1, IL-6, and tumor necrosis factor (TNF) α [5, 6]. Inflammatory cytokines and oxidative stress play an important role in dialysis-related cardiovascular events in MHD patients [7, 8]. In previous studies, systolic blood pressure (SBP), age, increased blood calcium (Ca) levels, and diabetes were demonstrated to be independent risk factors for carotid artery
Distribution of Miss Distance in Discrete-Time Controlled System with Noise-Corrupted State Information  [PDF]
Shengwen Xiang, Hongqi Fan, Qiang Fu
World Journal of Engineering and Technology (WJET) , 2017, DOI: 10.4236/wjet.2017.54B008
Abstract:
Miss distance is an important parameter of assessing highly maneuvering targets interception. Due to the noise-corrupted measurement and the fact that not all the state variables can be directly measured, the miss distance becomes a random variable with a priori unknown distribution. Currently, such a distribution is mainly evaluated by the method of Monte Carlo simulation. In this paper, an analytic approach is obtained in discrete-time controlled system with noise-corrupted state information. The system is subject to a bang-bang control strategy. The analytic distribution is validated through the comparison with Monte Carlo simulation.
Parameterization for narrow band shortwave optical properties of water clouds
Hongqi Wang,Gaoxiang Zhao
Chinese Science Bulletin , 1999, DOI: 10.1007/BF02896293
Abstract: Based on the drop size distribution models built from the observational data of microphysical properties of water clouds, the relationships between the optical properties and microphysical characteristics of water clouds have been investigated, and some different parameterization schemes of cloud optical properties have been analyzed. It is found that with the parameterization scheme, in addition to the equivalent radius, also including the mean radius of cloud droplet size distribution, the role of small cloud drops might be able to be considered more properly and better accuracies of parameterization calculation of cloud optical properties can be obtained, compared with that of using only the equivalent radius as parameter.
Algorithms for determination of land surface temperatures and emissivities from satellite radiative measurements
Gaoxiang Zhao,Hongqi Wang
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02884147
Abstract: Deriving LST from satellite radiative measurements is desirable, but the accurate determination of LST is very difficult, whcih is related to the atmospheric effect, the nonuniformity of land surface and the coupling between surface temperature and emissivity. In particular, the coupling between the land surface temperature and emissivity constructs a severe obstacle for the accurate determination of LST, because at present, the knowledge about global and surface emissivity is still very deficient. Based on the assumption that the change of emissivity is normally negligible in a short period of time a two-channel method is proposed to determine LSTs and emissivities, simultaneously, in which a set of measurement data of two channels made at two different time, day and night or two continuous days or nights, are used. If there are emissivity variations in two time measurements, with the relative changes of emissivities for different channels being the same, then a three-channel method can be used to determine land surface temperautre and ernssivity simultaneously.
3,3′,5,5′-Tetrabromo-2,2′-bithiophene
Hongqi Li,Lin Li
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809011647
Abstract: The title compound, C8H2Br4S2, was prepared by bromination of 2,2′-bithiophene with bromine. The molecule is located on a crystallographic twofold rotation axis, thereby imposing equal geometry of the two thiophene rings. Each five-membered ring is planar [maximum deviation 0.011 (9) ] and the dihedral angle between the planes through the rings is 47.2 (4)°. The molecules are arranged to minimize intramolecular contacts between the 3-3′ and 5-5′-bromine atoms.
On effects of Foreign Direct Investment on Economic Growth
Xinglong Xie,Hongqi Wang
International Business Research , 2009, DOI: 10.5539/ibr.v2n4p100
Abstract: Through the individual fixed effects model, the article makes the empirical study of 23 developing host countries, concluding that FDI weakly influences on the economic expansion rate directly and indirectly, the interaction term of FDI with regime affects the growth rate significantly and what is more, FDI’s interaction with regime contributes to the economic increase extensively through crowding in domestic investment. The regime in host countries imposes the positive effect on economic development mainly by means of two channels: one is crowding in FDI inflows into the host countries and the other one is to promote the increasing in domestic investment strongly. Therefore, good institutes are the critical determinant of the beneficial effects of FDI reaped in host countries. Consequently, developing governments should design the quality institute and make the innovation in regime for obtaining benefit from the technological spillovers of FDI so as to enhance their economic growth persistently.
Parameterization of Longwave Optical Properties for Water Clouds
水云的长波光学性质参数化

Wang Hongqi,Zhao Gaoxiang,
Wang Hongqi
,Zhao Gaoxiang

大气科学进展 , 2002,
Abstract: Based on relationships between cloud microphysical and optical properties, three different parameterization schemes for narrow and broad band optical properties in longwave region for water clouds have been presented. The effects of different parameterization schemes and different number of broad bands used on cloud radiative properties have been investigated. The effect of scattering role of cloud drops on longwave radiation fluxes and cooling rates in cloudy atmospheres has also been analyzed.
THE PHOTODISSOCIATION COEFFICIENTS OF OZONE AND OXYGEN IN THE CLOUDY TURBID ATMOSPHERE

Wang Hongqi,Zhou Xiuji,

大气科学进展 , 1984,
Abstract: In this paper, the effects of clouds with different albedos at different altitudes as underlying surface on the photodissociation coefficients of oxygen and ozone in the turbid atmosphere, where the multi-scattering of molecules and aerosols is considered, have been investigated. In addition, the effects of doubling the ozone concentration in the tropopausc due to the atmospheric motion on the photodissociation coefficients of ozone and oxygen are also studied.
Parameterization for narrow band shortwave optical properties of water clouds

Hongqi Wang,Gaoxiang Zhao,

科学通报(英文版) , 1999,
Abstract: Based on the drop size distribution models built from the observational data of microphysical properties of water clouds, the relationships between the optical properties and microphysical characteristics of water clouds have been investigated, and some different parameterization schemes of cloud optical properties have been analyzed. It is found that with the parameterization scheme, in addition to the equivalent radius, also including the mean radius of cloud droplet size distribution, the role of small cloud drops might be able to be considered more properly and better accuracies of parameterization calculation of cloud optical properties can be obtained, compared with that of using only the equivalent radius as parameter.
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