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Search Results: 1 - 10 of 104283 matches for " Wenqi Zhang "
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Reuse of Ferric Sludge by Ferrous Sulfide in the Fenton Process for Nonylphenol Ethoxylates Wastewater Treatment  [PDF]
Ruoyu Zhou, Wenqi Zhang
Computational Water, Energy, and Environmental Engineering (CWEEE) , 2017, DOI: 10.4236/cweee.2017.61007
Abstract: In this paper, Fenton process was determined to be an effective technique to treat the refractory Nonylphenol ethoxylates (NPEOs) wastewater. The COD removal efficien-cies above 89% were obtained when the initial COD concentration was 12000mg/L. However, A large number of ferric sludge (SS=8.724g/L) would be produced after the Fenton oxidation of the wastewater and must be disposed appropriately. A novel process for Fenton sludge reused by low-cost ferrous sulfide (FeS) was also investi-gated. Experimental results show that the Fenton sludge could be reduced to produce a certain amount of Fe2+ in the acidic mixed liquor by ferrous sulfide. This mixed liquor from Fenton sludge could be used as the new catalyst in the Fenton process and was also highly effective for the NPEOs wastewater treatment. The residual ferrous sulfide from the mixed liquor could be used for the next batch of the reaction
Treatment of the High Concentration Nonylphenol Ethoxylates (NPEOs) Wastewater by Fenton Oxidation Process  [PDF]
Ruoyu Zhou, Wenqi Zhang
American Journal of Analytical Chemistry (AJAC) , 2017, DOI: 10.4236/ajac.2017.81006
Abstract: The Fenton oxidation process was applied in the treatment of an actual high concentration nonylphenol Ethoxylates (NPEOs) wastewater. The effects of H2O2 dosage, molar ratio of H2O2/Fe2+ (Fe2+ dosage), pH value and reaction time on the degradation of NPEOs were investigated. The orthogonal experiment indicated that the order of degree of influence on the COD removal was molar ratio of H2O2/Fe2+, reaction time, dosage of H2O2, and initial pH. The single-factor tests were carried out to determine the optimal conditions, and the results were H2O2 dosage of 76.32 mmol/L, molar ratio of H2O2/Fe2+ of 3, pH value of 5 and reaction time of 2 h. Under the optimum operation conditions, the COD removal efficiency was 85.6% and the effluent could be mixed with other wastewater into the large-scale biological treatment system.
Carbonization of Chlorinated Organic Residual Liquid for Energy Source Generation  [PDF]
Yongquan Ge, Wenqi Zhang, Gang Xue, Jiachang Zhao
Journal of Materials Science and Chemical Engineering (MSCE) , 2015, DOI: 10.4236/msce.2015.312014
Abstract: Chlorinated organic residual liquid is produced from the distillation process of new refrigerants production. It is difficult to be treated by traditional water treatment process and incineration process. In this study, a carbonization process at atmospheric pressure was used to convert this residual liquid to carbonaceous product and organic gas in 2 h at 230℃ or 260℃. The carbonaceous product was characterized by scanning electron microscope, Fourier-transform infrared spectrometer and thermo gravimetric analysis. The element composition and the high heat value of these products were similar to anthracite and lignite, respectively, showing that they could be used as alternative fuels. The components of organic gas were analyzed using gas chromatography-mass spectrometry and the gas had potential for incineration.
Hydrothermal Carbonization of Nonylphenol Ethoxylates Waste Liquid for Energy Source Generation  [PDF]
Yongquan Ge, Wenqi Zhang, Gang Xue, Pinhua Rao
American Journal of Analytical Chemistry (AJAC) , 2015, DOI: 10.4236/ajac.2015.613101
Abstract: Nonylphenol polyethoxylates (NPEOs) are widely used as nonionic surfactants in many industry fields. High concentration NPEOs waste water is produced in some production processes. It is often treated to realize reduction by distillation. Therefore, NPEOs waste liquid with higher concentration is produced and it is difficult to be treated by traditional water treatment process. In this study, hydrothermal carbonization process was used to convert NPEOs waste liquid to carbonaceous product (hydrochar) with sulfuric acid as additive in 24 h at 200°C. The hydrochar was characterized by scanning electron microscope, Fourier-transform infrared spectrometer and thermogravimetric analysis. The element composition and the high heat value of the hydrochar were similar to lignite, showing that it could be used as an alternative fuel.
The In Vivo Role of the RP-Mdm2-p53 Pathway in Signaling Oncogenic Stress Induced by pRb Inactivation and Ras Overexpression
Wenqi Pan,Sameer Issaq,Yanping Zhang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0021625
Abstract: The Mdm2-p53 tumor suppression pathway plays a vital role in regulating cellular homeostasis by integrating a variety of stressors and eliciting effects on cell growth and proliferation. Recent studies have demonstrated an in vivo signaling pathway mediated by ribosomal protein (RP)-Mdm2 interaction that responds to ribosome biogenesis stress and evokes a protective p53 reaction. It has been shown that mice harboring a Cys-to-Phe mutation in the zinc finger of Mdm2 that specifically disrupts RP L11-Mdm2 binding are prone to accelerated lymphomagenesis in an oncogenic c-Myc driven mouse model of Burkitt's lymphoma. Because most oncogenes when upregulated simultaneously promote both cellular growth and proliferation, it therefore stands to reason that the RP-Mdm2-p53 pathway might also be essential in response to oncogenes other than c-Myc. Using genetically engineered mice, we now show that disruption of the RP-Mdm2-p53 pathway by an Mdm2C305F mutation does not accelerate prostatic tumorigenesis induced by inactivation of the pRb family proteins (pRb/p107/p130). In contrast, loss of p19Arf greatly accelerates the progression of prostate cancer induced by inhibition of pRb family proteins. Moreover, using ectopically expressed oncogenic H-Ras we demonstrate that p53 response remains intact in the Mdm2C305F mutant MEF cells. Thus, unlike the p19Arf-Mdm2-p53 pathway, which is considered a general oncogenic response pathway, the RP-Mdm2-p53 pathway appears to specifically suppress tumorigenesis induced by oncogenic c-Myc.
Function of resveratrol derived from transgenic plant expressing resveratrol synthase gene
La Ping,Cai Wenqi,Zhang Jiuchun,Zhang Fengli,Fang Rongxiang
Chinese Science Bulletin , 2001, DOI: 10.1007/BF02900688
Abstract: Two genes from grapevine coding for resveratrol synthase, named RS1 and RS2, were cloned by RT-PCR. AnEscherichia coli expression vector was constructed by insertion of RS1 into pBV221. A specific protein with the same molecular weight (42 ku) as the resveratrol synthase was expressed and used to prepare the rabbit antiserum. A plant expression vector was constructed by inserting the RS1 gene into pBin438 downstream of the doubled CaMV 35S promoter and TMV-Ω fragment. PCR-positive transgenic tobacco plants were obtained after transformation withAgrobacterium tumefaciens LBA4404 harboring the plant expression vector. Southern blot analysis demonstrated that the foreign gene was integrated into the tobacco genome. The results of RT-PCR and Western blot indicated that the RS1 gene was transcribed and expressed. Formation of resveratrol in transgenic tobacco was further determined by thin-layer chromatography of silica gel and HPLC. Increased accumulation of human breast adenocarcinoma cells in G0 and G1 phases of cell cycle was observed in cells treated with resveratrol purified from transgenic tobacco as compared to the untreated cells.
Identity Authentication Based on Two-Beam Interference  [PDF]
Wenqi He, Xiang Peng
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.24005

A two-factor identity authentication method on the basis of two-beam interference was presented. While verifying a user’s identity, a specific “phase key” as well as a corresponding “phase lock” are both mandatory required for a successful authentication. Note that this scheme can not only check the legality of the users, but also verify their identity levels so as to grant them hierarchical access permissions to various resources of the protected systems or organizations. The authentication process is straightforward and could be implemented by a hybrid optic-electrical system. However, the system designing procedure involves an iterative Modified Phase Retrieval Algorithm (MPRA) and can only be achieved by digital means. Theoretical analysis and simulations both validate the effectiveness of our method.

APPlications of Polymerase Chain Reaction to Environmental Microbiology

Hu Wenqi,Zhang Zhiguang,

环境科学 , 1994,
Abstract: Because of its high sensitivity, high specificity andsimplicity,POlymerase Chain Reaction(PCR)hasbeen widely used to detect pathogenic bacteria,indicator bacteria and viruses in environmentalsamples since its creation in 1985.A review wasmade on the fundamental priciples,methodology andcurrent status of the applications of PCR toenvironmental microbiology.
River Trip Optimization Scheduling Based on Artificial Intelligence Simulation and the Bee-Swarm Genetic Algorithm
Zhan Wenting,Zhang Yuanbiao,Luan Weixia Shen Zhongjie,Zhong Wenqi
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: The study on the impacts of human activities on natural resources is of critical importance in constructing effective management strategies in rafting trips. The Camping Schedule Intelligent Generator (CSIG), the computer program developed in the study, which successfully models the complex, dynamic human-environment interactions in the rafting river. This generator includes two parts: artificial intelligence simulation and BSGA-based Optimization. It employs artificial intelligence in creating an individual-based modeling system. With the help of BSGA, this simulation system successfully models the recreatinal rafting behavior and captures the decision making of rafting trips as they responsively seek to optimize their functions. After modeling, the paper applys CSIG to the Colorado River, which is a famous rafting river and find that: the numbers of short motor-trips (6-8 day) and long-oar trips (15-18 day) are obviously larger than the other two. Finally, the study analyzes the sensitivity of the model and finds that when the water velocity varies in the actual range.
Analysis of factors related to patient peritoneal dialysis drop out rates
Yang Lin,Zhang MingHua,Zhong WenQi,Liu XiaoJiao
Saudi Medical Journal , 2013,
Abstract: [No abstract available]
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