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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

Effect of 2-(8-hydroxy-6-methoxy-1-oxo-1H-2-benzopyran-3-yl) propionic acid in combination with carboplatin on gastric carcinoma growth in vivo

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World Journal of Gastroenterology 2007年第4期13卷 509-514页

作者： Jin-Lian chen Jin-Shui Zhu Jing Hong Ming-Xiang chen Jin-Lai Lu wei-Xiong chen bo Shen Zu-Ming Zhu Ni-wei chen Department of Gastroenterology Shanghai Sixth People's Hospital Shanghai Jiaotong University Shanghai 200233 China

AIM： To investigate the effects of 2-（8-hydroxy-6- methoxy-l-oxo-lH-2-benzopyran-3-yl） propionic acid （NM-3） alone and in combination with carboplatin on tumor growth and apoptosis in mouse models of human gastric cancer constructed by subcutaneous implantation of histologically intact tumor tissue. METHODS： Human gastric cancer SGC-7901 tissues were implanted into the dorsal subcutis of nude mice. One week after tumors reached to a volume of 50-100 mm3 for around 1 wk, these mice were randomly divided into 8 groups （n = 10）. NM-3 was injected peritoneally at the dose of 10 mg/kg, 20 mg/kg or 40 mg/kg every other day for 5 wk, combined with carboplatin （5 mg/kg） every third day for 4 wk. As controls of combined treatment, another 4 groups of mice were injected with either NM-3 at 10 mg/kg, 20 mg/kg or 40 mg/kg, or with carboplatin alone （5 mg/kg）. The control mice received normal saline. Tumor weight, tumor growth inhibition （TGI）, and intratumoral microvessel density （MVD） were evaluated. Apoptosis of human gastric cancer was detected by TUNEL method and flow o/tometry analysis, respectively. RESULTS： The mean tumor volume （692.40 ± 58.43 mm3, 548.30 ± 66.02 mm3, 382.13 ± 43.52 mm3） after treatment with carboplatin combined NM-3 at the dose of 10 mg/kg, 20 mg/kg or 40 mg/kg was lower than that after treatment with either NM-3 at the dose of 10 mg/kg, 20 mg/kg or 40 mg/kg or with carboplatin alone. Compared with the normal saline group, NM-3 administered at 10 mg/kg, 20 mg/kg or 40 mg/kg significantly reduced the tumor weight in these groups （P 〈 0.05）. Carboplatin used alone at 5 mg/kg showed minimal effects. But NM-3 in combination with carboplatin had greater effects of tumor weight than either NM-3 or carboplatin alone. NM-3 alone at the dose 10 mg/kg or in combination with carboplatin had no obvious effects on body changes. Two mice died of diarrhea in each of the two groups treated with 40 mg/kg NM-3 or with 40 mg/kg NM-3 in combination with carboplatin. A

关键词： NM-3 Carboplatin Gastric carcinoma Angiogenesis Apoptosis

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

Recent advances of sonodynamic therapy in cancer treatment

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Cancer Biology & Medicine 2016年第3期13卷 325-338页

作者： Guo-Yun Wan Yang Liu bo-wei chen Yuan-Yuan Liu Yin-Song Wang Ning Zhang Research Center of Basic Medical Science & School of Pharmacy Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics) Tianjin Medical University Laboratory of Cancer Cell Biology National Clinical Research Center for Cancer Tianjin Key Laboratory of Cancer Prevention and Therapy Tianjin Medical University Cancer Institute and Hospital

Sonodynamic therapy(SDT) is an emerging approach that involves a combination of low-intensity ultrasound and specialized chemical agents known as sonosensitizers. Ultrasound can penetrate deeply into tissues and can be focused into a small region of a tumor to activate a sonosensitizer which offers the possibility of non-invasively eradicating solid tumors in a site-directed *** this article, we critically reviewed the currently accepted mechanisms of sonodynamic action and summarized the classification of sonosensitizers. At the same time, the breath of evidence from SDT-based studies suggests that SDT is promising for cancer treatment.

关键词： Sonodynamic therapy sonosensitizer cancer ultrasound reactive oxygen species