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Articles by Yong Wang
Total Records ( 11 ) for Yong Wang
  Yong Wang , Yanping Liu , Lintao Liu , Zengzhang Guo , Xiaosan Ge and Houze Xu
  As a preliminary step for assessing the impact of global positioning system (GPS) refractive delay data in numerical weather prediction (NWP) models, the GPS zenith tropospheric delays (ZTD) are analyzed from 28 permanent GPS sites in the Chinese mainland. The objectives are to estimate the GPS ZTD and their variability in this area. The differences between radiosonde precipitable water vapor (PWV) and GPS PWV have a standard deviation of 4 mm in delay, a bias of 0.24 mm in delay, and a correlation coefficient of 0.94. The correlation between GPS ZTD and radiosonde PWV amounts to 0.89, indicating that the variety of tropospheric zenith delay can reflect the change of precipitable water vapor. The good agreement also guarantees that the information provided by GPS will benefit the NWP models. The time series of GPS ZTD, which were derived continuously from 2002 to 2004, are used to analyze the change of precipitable water vapor in Chinese mainland. It shows that the general trend of GPS ZTD is diminishing from the south-east coastland to the north-west inland, which is in accordance with the distribution of Chinese annual amount of rainfall. The temporal distribution of GPS ZTD in the Chinese mainland is that the GPS ZTD reaches maximum in summer, and it reaches minimum in winter. The long term differences between the observational data sources require further study before GPS derived data become useful for climate studies.
  Mingfeng Jiang , Yan Chen , Yong Wang , Juan J. Loor , Yuhui Ye , Yongli Wen , Xiangdong Zi , Yingfan Cai and James K. Drackley
  The cDNA coding for stomach lysozyme in yak was cloned. The cloned cDNA contains a 432 bp open reading frame and encodes 143 amino acids (16.24 KDa) with a signal peptide of 18 amino acids. Further analysis revealed that its amino acid sequence shares many common properties with cow milk lysozyme. Expression of this gene was also detected in mammary gland tissue by RT-PCR. Phylogenetic relationships among yak stomach lysozyme and 8 cow lysozymes indicated that the yak enzyme is more closely related to both cow milk lysozyme and the pseudogene ΨNS4 than cow stomach lysozyme. Recombinant yak lysozyme purified by Ni2+-column showed a molecular weight of 33.78 kDa and exhibited lytic activity against Staphylococcus aureus, providing evidence of its antibacterial activities.
  Xiaoqing Cheng , Aimin Zhu , Yuzhuo Zhang , Yong Wang , C.T. Au and Chuan Shi
  Previously, we reported the prominent catalytic activity of ceria-supported nickel oxide catalyst for the reduction of NO by CO [Y. Wang, A.M. Zhu, Y.Z. Zhang, C.T. Au, X.F. Yang, C. Shi, Appl. Catal. B 81 (2008) 141–149]. In the present study, the reaction mechanism of NO and CO over the NiO/CeO2 catalyst has been examined in two kinds of reaction modes: (i) NO reaction with CO pre-treated catalyst and (ii) CO reaction with NO pre-treated catalyst, by employing in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) coupled with mass spectroscopy (MS) techniques. It was found that the generation of surface NCO complexes and N2 (g) occurs only in mode (i), which gives obvious evidence of NO dissociation over CO pre-reduced NiO/CeO2 catalyst. The result is similar to that obtained in the case of NO and CO co-adsorption, but different from that of mode (ii). The overall results indicate that CO reduction of surface oxygen should be the first and crucial step, and the dissociation of NO on the CO-reduced surface is a pathway for N2 generation. The other pathway for N2 generation is the interaction of NCO complexes with NO. Based on these understandings, we proposed reaction steps for the catalytic reduction of NO by CO over the NiO/CeO2 catalyst.
  Yong Wang
  Information theory was firstly used in communication. With the development of information technology, information theory has exposed its limitations and some generalized information theories were proposed. This study presents a review and discussion of the literature on the generalized information theories. Some viewpoints about the theory are proposed. An outlook of the development of generalized information theory is given. More attention should be put on the reliability and completeness of information. The multiple uncertainties of information cannot be ignored under more general conditions, especially the randomness of probability. We can naturally generalize Shannon’s information theory by taking probability as random variable. That may result in a fusion of information theory, Artificial Intelligence (AI), information fusion and other relevant theories.
  Dawei Li , Honglun Wang , Yong Wang and Yi Sun
  In this paper, according to the special layout of the tilting grille UAV, the aerodynamic characteristics of the UAV(unmanned aerial vehicle) was analyzed by CFD(computational fluid dynamics) method, and the result was validated through flight test. In CFD method, coordinate transformation and vector superposition were used to obtain the total aerodynamic force and moment characteristics, this method can substantially reduce the demand of computing resource. Based on the CFD result, the grille can reduce propeller actual pulling force, and the aerodynamic force and moment changed much. The flight test shows that the result of CFD can predict the flow characteristics and aerodynamic characteristics of the UAV during transition mode, and it can ensure the modeling precision for UAV flight control law design reference.
  Lili Song , Yong Wang , Wangjing Lu , Guojiang Wu , Yueming Jiang and Haiyan Gao
  This study was conducted with a view to explaining this observation in terms of expressions of expansin and xyloglucan endotransglucosylase (XET) genes in relation to senescence progress of cut carnation flower. T wo cDNAs fragments (DcExp 1 and DcExp 2) encoding expansins and two cDNAs fragments (DcXet 1 and DcXet 2) encoding XETs were cloned from petals at the floral opening and three various aging stages of cut carnation flowers, respectively. DcExp 2 expression appeared initially, increased slowly, reached to the most intensity at 5 days and then decreased at 8 days of vase holding of cut carnation flowers but DcExp 1 did not express. As compared to the non-ATP-treated cut flowers, DcExp 2 expression was hardly detected at the final stage of vase holding in the ATP-treated cut flowers, which suggested that DcExp 2 might be involved in senescence progress of the cut carnation flowers. For XET expression, no accumulation of DcXet 1 transcript was detected in either non-ATP-treated or ATP-treated cut carnation flowers during vase holding, which indicated that DcXet 1 was not related to senescence of the cut carnation flowers. DcXet 2 expressed only within the first 5 days of vase holding in non-ATP-treated flowers. Exogenous ATP supply inhibited the expression of DcXet 2 at a later stage of vase holding. Thus, ATP treatment appeared to inhibit the expressions of DcExp 2 and DcXet 2 at the later stage of vase holding of cut carnation flowers and then extend their vase life.
  Yong Wang , Xiao-Ping Zhao and Jian-Wei Ruan
  Aceclofenac is a non steroidal anti inflammatory drug which is used to manage the chronic pain and inflammation in the patients of rheumatoid arthritis. But it is associated with short half-life (2-3 h) and gastro-intestinal side effects. To overcome these problems the transdermal delivery of aceclofenac can be investigated for prolonged relief from pain and local inflammation in arthritis. The transdermal films of aceclofenac were prepared using two different permeation enhancers (A nonionic surfactant-Span-20 and a terpene-d limonene) in two different concentrations with solvent evaporation method. The prepared transdermal films were subjected to physicochemical evaluations, ex vivo permeation and in vivo anti-inflammatory studies. The prepared matrix type transdermal films showed high drug content ranging from 94.90±1.40 to 98.20±2.60 with completely flat surface and the folding endurance in the range of 120.0±9.24 to 182.0±4.20. The scanning electron microscopy showed that the drug particles were dispersed in the matrix of the film and was found to be projected on the surface of film also. The ex vivo permeation study in the modified Franz diffusion apparatus through excised rat abdominal skin in pH 7.4 phosphate buffer showed prolonged drug permeation ranging from 61.02-93.4%. The films prepared with permeation enhancers showed greater percent drug permeated at the end of 24 h. The d-limonene showed the greater permeation enhancement effect as compared to that of Span 20. Increasing the concentration of enhancers showed the increased permeation of the drug. The transdermal films were found to be non-irritant to the skin in primary skin irritation test on Wistar rats. The transdermal films with permeation enhancers showed the greater anti inflammatory activity in carrageenan induced hind rat paw edema model. It was concluded that the transdermal films of aceclofenac have the great potential for the use in treatment of arthritis. And d-limonene can have greater effect on increasing the drug flux and eliciting the anti-inflammatory effect as compared to that of Span 20 for the transdermal delivery of aceclofenac.
  Yong Wang , Zhongyang Wang , Peng Yu and Yun Li
  Background and Objective: Non-alcoholic Fatty Liver Disease (NAFLD) is a disease of excessive lipid accumulation which sensitizes the liver cells and leads to hepatic insulin resistance, inflammation and oxidative stress. This study was aimed to evaluate the hepato-protective effect of Byrsonima sericea extract (BSE) against High fat emulsion diet (HFED) induced NAFLD in rats. Materials and Methods: The NAFLD was induced by administration of HFED (10 mL kg–1/p.o.), along with micro dose of carbon tetra chloride (CCl4) (0.5 mL kg–1, i.p.). The experiment includes 5 groups with 6 rats in each group. Group 1 was normal control, Group 2 was negative control, where rats received HFED (10 m kg–1 p.o, B.W) and CCl4 (0.5 mL kg–1, i.p.). Group 3, 4 and 5 were BSE treated rats in a dose of 75, 150 and 300 mg kg–1, respectively. All rats were tested for physical as well as biochemical estimations like ALP, blood glucose, insulin and bilirubin content. Histopathological examination of liver was also performed in trial groups of rats. Results: The extract at a dose of 300 mg kg–1 (i.p.) showed significant protective effect by reducing the higher content of cholesterol, triglycerides, LDL and VLDL level in serum of rats. It also showed a potential decrease in ALP, total bilirubin and SGOT content in serum. The rats treated with extract showed less hepatic damage in liver cells as compare with negative control group rats. Conclusion: This study concluded that the rats treated with BSE have significant hepatoprotective action and acts by modulating the hepatic enzymes secretion, via reducing weight gain and organ fat deposition in rats.
  Tongwang Zhang , Zhijun Zhou , Yong Wang and Jianguo Xia
  Background and Objective: Propranolol is an agent which blocks β-adrenergic stimuli via the inhibition of β-adrenergic receptors in the myocardial, bronchial and smooth muscle regions. When using it with other agents such as Omniscan, various contradictions can occur as a risk to Propranolol pharmacokinetics and metabolism. This study was conducted to predict the effects of co-administration of both agents, Propranolol and Omniscan, respectively. Materials and Methods: ChemDIS-Mixture (v.5.0) was used for the prediction and identification of various effects caused by the co-administration of both agents. The confidence score was adjusted to medium (0.4), while the level of significance was set at 0.05, using Benjamini-Hochberg multiple test correction. Results: The findings of the predictive analysis revealed that the co-administration of Propranolol and Omniscan produced several effects in the human body, including the involvement of various proteins, molecular pathways and diseases. 04 new signalling pathways, 08 GO terms, 17 DO terms as well as 21 DOLite terms. Conclusion: The use of Propranolol should be considered before the administration of Omniscan in patients scheduled for MRI examinations to avoid unprecedented effects in the body as well as serious complications in diseased patients caused due to Drug-Drug Interactions (DDIs).
  Guo-Fang Zhang , Yong Wang , Mei-Yu Cai , Da-Min Dai , Ke Yan , An-Shan Ma , Peng Chen , Rui Wang , Ping Li , Jian-Hua Yi , Feng-Qi Zhao , Ji-Zhen Li and Xue-Zhong Fan
  Eight alkaline and alkaline-earth compounds derived from 2,4-dinitroimidazole (2,4-HDNI) were synthesized and characterized by elemental analysis, FT-IR, and TG-DSC, of which K(2,4-DNI) (1), Rb(2,4-DNI)(2,4-HDNI)(H2O)2 (2), and Ba(2,4-DNI)2(H2O)4 (3) were characterized by single-crystal X-ray diffraction analysis. All the three compounds were crystallized from water, but 1 was an anhydrate. The coordination number in 1 and 3 is 10, but in 2 is 9. The 2,4-DNI adopts either η3, η2, or η1 coordination modes depending on the metal cation. In 3, there is an inversion center located on the metal. Only in 2 does water play an important role for the construction of the structure; in 3 it is a hydrogen bonding participant. TG-DSC analyses of 1 were also performed, and non-isothermal decomposition reaction kinetics were obtained.
  Yong Wang
  With the development of computing power and cryptanalysis technology, unconditional security of cryptosystem is more and more important. This study presents a review of the literature on the unconditional security of cryptosystem. One-time pad and most quantum key distribution protocols were proved to be unconditionally secure. The development and extension of unconditional security is represented. As unconditional security is strict and hard to reach, some moderate security ideas are proposed and an outlook is given.
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