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Electrostatically Controlled Nematic and Smectic Assembly of Gold Nanorods

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Chemical Research in Chinese Universities 2013年第5期29卷 929-933页

作者： wei Wen-bo chen Kuan GE Guang-lu National Center for Nanoscience and Technology Beijing 100190 P. R. China

The assembly of gold nanorods（GNRs） into different liquid crystalline structures can be controlled by tuning their surface electric potential, After mildly removing excess surfactants in the GNRs solution, the electrostatic interaction between GNRs can be tuned by adjusting counter ion concentration. Specifically, nematic and smectic structures formed after solvent evaporation at low and high bromide concentrations, respectively. These results could be helpful for fabricating anisotropy enabled devices composed of metal and semiconductor nanorods.

关键词： Nanorod Nanostructure Self-assembly

Research progress in biohydrometallurgy of rare metals and heavy nonferrous metals with an emphasis on China

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Rare Metals 2016年第6期35卷 433-442页

作者： Jian-Kang Wen bo-wei chen He Shang Guo-cheng Zhang National Engineering Laboratory of Biohydrometallurgy General Research Institute for Nonferrous Metals Beijing 100088 China

In the past decade, progress in the field of biohydrometallurgy had been significant. A total of 17 novel biomining microorganisms were discovered, and eight copper heap bioleaching plants and 11 gold biooxidation plants were established or expanded. In this review, it was summarized the physiological properties of the newly isolated biomining microorganisms and three novel microbial ecological methods for studying microbial community dynamics and structure. In addition, biohy- drometallurgy research on rare metals such as uranium, molybdenum, tellurium, germanium, indium, and sec- ondary rare metal resources, as well as heavy nonferrous metals such as copper, nickel, cobalt, and gold has been reviewed, with an emphasis on China. In future, further studies on bioleaching of chalcopyrite, rare metals, secondary resources from waste, and environmental pollution caused by resource utilization are necessary.

关键词： Biohydrometallurgy Microbial ecology Rare metals Practice

Mechanism of Mg2+ dissolution from olivine and serpentine: Implication for bioleaching of high-magnesium nickel sulfide ore at elevated pH

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International Journal of Minerals,Metallurgy and Materials 2019年第9期26卷 1069-1079页

作者： Jian-zhi Sun Jian-kang Wen bo-wei chen Biao Wu National Engineering Laboratory of Biohydrometallurgy GRINM Group Corporation Limited

To inhibit the dissolution of Mg^2+ during the bioleaching process of high-magnesium nickel sulfide ore, the effect of major bioleaching factors on the dissolution of Mg^2+ from olivine and serpentine was investigated and kinetics studies were carried out. The results indicated that the dissolution rate-controlling steps are chemical reaction for olivine and internal diffusion for serpentine. The most influential factor on the dissolution of Mg^2+ from olivine and serpentine was temperature, followed by p H and particle size. A novel method of bioleaching at elevated pH was used in the bioleaching of Jinchuan ore. The results showed that elevated pH could significantly reduce the dissolution of Mg^2+ and acid consumption along with slightly influencing the leaching efficiencies of nickel and cobalt. A model was used to explain the leaching behaviors of high-magnesium nickel sulfide ore in different bioleaching systems. The model suggested that olivine will be depleted eventually, whereas serpentine will remain because of the difference in the rate-controlling steps. Bioleaching at elevated pH is a suitable method for treating high-magnesium nickel sulfide ores.

关键词： olivine serpentine high-magnesium nickel sulfide ore bioleaching shrinking core model elevated pH

Eu(Ⅲ) complex-doped PMMA having fast radiation rate and high emission quantum efficiency

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Chinese Chemical Letters 2012年第8期23卷 945-948页

作者： Jin Li Zhang bo wei chen Xuan Luo Kai Du Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900China School of Physics and Electronic Engineering Mianyang Normal UniversityMianyang 621000China

Three Eu（III） ternary complexes, Eu（hfa-H）3（Phen）, Eu（hfa-H）3（Bipy） and Eu（hfa-H）3（Bath）（hfa = hexafluoroacetylacetonate, Phen = 1,10-phenanthroline, Bipy = 2,2＇-bipyridine, Bath = bathophenanthroline）, were synthesized. Their luminescent properties were studied by incorporating deuterated Eu（III） complexes in a poly（methylmethacrylate）（PMMA） matrix, and the results indicated that luminescent PMMA including Eu（hfa-D）3（Bath） showed promising results for applications to novel organic Eu（III） devices, such as the high-power laser materials. Additionally, all the three Eu（III） complexes exhibited good thermostabilization.

关键词： Photolunainescence Eu(III) complex Rare earths

Control of redox potential by oxygen limitation in selective bioleaching of chalcocite and pyrite

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Rare Metals 2014年第5期33卷 622-627页

作者： Biao Wu Jian-Kang Wen bo-wei chen Guo-cheng Yao Dian-Zuo Wang National Engineering Laboratory of Biohydrometallurgy General Research Institute for Nonferrous Metals

Based on the bioleaching mechanism and electrochemical studies of metal sulfides, the dissolution rates of chalcocite and pyrite are controlled by redox potentials. Experiment on the bioleaching of chalcocite and pyrite under constant redox potential by sparging with nitrogen gas was demonstrated. By leaching at low and constant redox potential（〈760 mV, vs SHE）, copper recoveries of 90 %–98 % are achieved, which are 10 times more than iron recoveries. The iron-oxidizing bacterial populations are observed to continue to reduce under oxygen limitation conditions, but the Acidithiobacillus that have only sulfur-oxidizing capabilities are an attractive alternative for redox-controlled bioleaching of ***, the described redox control technique might be one of the effective approaches to balance acid and iron in Zijinshan copper bio-heap leaching practice.

关键词： Pyrite Chalcocite Bioleaching Redox potential Oxygen limitation

Risk assessment in patients undergoing liver resection

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Hepatobiliary & Pancreatic Diseases International 2013年第5期12卷 473-479页

作者： De-Cai Yu wei-bo chen Chun-Ping Jiang Yi-Tao Ding Department of Hepatobiliary Surgery Drum Tower Hospitalthe Affiliated Medical School of Nanjing University Institute of Hepatobiliary Surgery Nanjing University

BACKGROUND:Liver resection is still a risky procedure with high morbidity and *** is significant to predict the morbidity and mortality with some models after liver *** SOURCES:The MEDLINE/PubMed,Web of Science,Google Scholar,and Cochrane Library databases were searched using the terms "hepatectomy" and "risk assessment" for relevant studies before August *** published in English were ***:Thirty-four original papers were included *** models,such as MELD,APACHE II,E-PASS,or POSSUM,widely used in other populations,are useful to predict the morbidity and mortality after liver *** special models for liver resection are used to predict outcomes after liver resection,such as mortality,liver dysfunction,transfusion,or acute renal ***,there is no good scoring system to predict or classify surgical complications because of shortage of internal or external ***:It is important to validate the models for the major complications after liver resection with further internal or external databases.

关键词： hepatectomy risk factors risk assessment mortality morbidity

Preoperative inflammation-based markers predict early and late recurrence of hepatocellular carcinoma after curative hepatectomy

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Hepatobiliary & Pancreatic Diseases International 2016年第3期15卷 266-274页

作者： Yue Liu Zhong-Xia Wang Yin Cao Guang Zhang wei-bo chen Chun-Ping Jiang Department of Hepatobiliary Surgery the Affiliated Drum Tower Hospital of Nanjing University Medical School

BACKGROUND： Recurrence of hepatocellular carcinoma （HCC） after curative resection remains a major cause of treatment failure and tumor-related death. Patterns of HCC recur- rence can be categorized into early recurrence and late recurrence which have different underlying mechanisms. In this study, we investigated if simple inflammation-based clinical markers can distinguish patterns of recurrence after curative resection of HCC.

关键词： hepatocellular carcinoma inflammation prognosis recurrence hepatectomy

Preoperative serum liver enzyme markers for predicting early recurrence after curative resection of hepatocellular carcinoma

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Hepatobiliary & Pancreatic Diseases International 2015年第2期14卷 178-185页

作者： Zhong-Xia Wang Chun-Ping Jiang Yin Cao Guang Zhang wei-bo chen Yi-Tao Ding Department of Hepatobiliary Surgery the Affiliated Drum Tower Hospital of Nanjing University Medical School Department of Hepatobili-ary Surgery Nanjing Drum Tower Hospital Clinical Medical College of Nanjing Medical University Department of Hepatobiliary Surgery Nanjing Drum Tower Hospital Clinical Medical College of Nanjing Medical University

BACKGROUND：Early recurrence of hepatocellular carcinoma（HCC）is associated with worse prognosis after liver resection This study aimed to investigate the prognostic value of com mon liver enzyme markers in HCC early recurrence after cu rative hepatectomy and to establish a simple predictive model for HCC early ***： A total of 200 patients who had undergone curative resection for HCC were retrospectively analyzed. The patients were divided into early recurrence （within 2 years） and non-early recurrence groups. Demographical characteristics, preopera- tive liver function parameters, surgical factors and tumor related factors of the patients were assessed by univariate analysis to identify potential significant predictors for early recurrence after resection of HCC. Parameters with statisti- cal significance were entered into a Cox proportional hazard model to find independent risk factors. Receiver operating characteristic analysis was done to determine optimal cut-off values and the number of combined factors in multi-factor predictive model. RESULTS： Of 13 potential risk factors for early recurrence identified by univariate analysis, high lactate dehydrogenase （LDH〉206 U/L, HR=1.711, P=0.006）, high aspartate aminotransferase （AST）/alanine aminotransferase （ALT） ratio （AST/ ALT〉0.96, HR=1.769, P=0.006）, elevated alpha-fetoprotein （AFP〉8.6 ng/mL, HR=2.079, P=0.007）, small resection margin （〈1 cm, HR=2.354, P〈0.001） and advanced TNM stage （TNM III-IV, HR=2.164, P〈0.001） were independent risk factors for early recurrence of HCC shown by multivariate analysis. Patients with three or more concurrent independent risk factors had significantly higher risk for early recurrence than those with low risk factors. The sensitivity and specificity of this predictive model are 53.6% and 80.7%, respectively （area under curve=0.741, 95% CI 0.674-0.800, P〈0.0001）. CONCLUSIONS： Preoperative common fiver enzyme markers, LDH and AST/ALT ratio, were independently associated

关键词： hepatocellular carcinoma liver enzyme recurrence resection hepatectomy

Nitro-oleic acid ameliorates erectile dysfunction in a streptozotocin-induced rat model of diabetes by inhibiting oxidative stress and apoptosis and activating the NO/cGMP pathway

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Asian Journal of Andrology 2024年第1期26卷 57-66页

作者： Chang-bo Zhao wei-bo chen Wen-Zhen Wang Fang-Xin Gong Cui-Qin Fan Ye Li Tian Lan Wen-Jing Wang Ming-Zhen Yuan Department of Urology Shandong Provincial HospitalShandong UniversityJinan 250012China Department of Andrology Liaocheng People's HospitalShandong UniversityLiaocheng 252000China Department of Urology The Second Hospital of Shandong UniversityJinan 250012China Department of Physiology School of Basic Medical SciencesShandong UniversityJinan 250012China

The major vascular complications associated with diabetes make the management of diabetic mellitus erectile dysfunction(DMED)a challenging *** factors contributing to DMED include oxidative stress,nitric oxide(NO)/cyclic guanosine monophosphate(cGMP)pathway activation,and apoptosis,while nitro-oleic acid(NO,-OA)has been shown to be beneficial in treating these aspects of this ***,herein,investigated the effects and possible mechanisms of NO,-OA on erectile function as assessed in a streptozotocin-induced rat model of *** results revealed that the erectile function of DMED rats was significantly impaired compared with that of the control ***,in response to 4 weeks of NO,-OA treatment,there was an improvement in erectile *** expression of oxidative stress-related indicators was significantly increased and the NO/cGMP pathway was impaired in the DMED *** expression of proapoptotic factors was increased,while that of antiapoptotic factors was decreased in the DMED ***,the cell morphology in the cavernous tissue of the DMED group also changed ***,-OA treatment significantly reversed all these changes observed in the DMED *** conclusion,NO,-OA treatment partially improved erectile function in DMED rats through mechanisms that included inhibition of oxidative stress,activation of the NO/cGMP pathway,and a reduction in apoptosis.

关键词： apoptosis diabetic mellitus erectile dysfunction nitro-oleic acid NO/cGMP pathway oxidative stress