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Making waste profitable: Efficient recovery of metallic iron from jarosite residues

Chinese Journal of Chemical Engineering 2024年第7期71卷 66-76页

作者： Songshan Zhou Yunhui Han Rong Huang Yin Huang Qingyuan Dong Haiyin Gang Jinchuan Qin Xi Yu Xiangfei Zeng Wenxing Cao Jiqin Wang shaoqin chen Rong Wang Mengjun chen Key Laboratory of Solid Waste Treatment and Resource Recycle(SWUST) Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China School of Environment Key Laboratory of Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China School of National Defense Science and Technology College SWUST Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China

To address the hazardous by-product of zinc smelting and resource utilization of jarosite residue,this study applies an electric field-assisted hot acid treatment to completely recycle iron(Fe).This innovative approach aims to enhance the leaching efficiency of Fe from jarosite *** introduction of an electric field changes the charge distribution on the surface of the particles to enhance ions and electrons exchange and promotes the collision between particles to strengthen reaction *** on the above,the leaching efficiency of Fe in jarosite under sulfuric acid attack has improved *** result shows that Fe leaching efficiency reaches 98.83%,which is increased by 28%under the optimal experimental conditions:current density of 30 mA·cm^(-2),H_(2)SO_(4) concentration of 1.5 mol·L^(-1),solid-liquid ratio of 70 g·L^(-1),temperature of 80℃ and time of 12 *** kinetics calculations show that the apparent activation energy is 16.97 kJ·mol^(-1) and the leaching of jarosite residue is controlled by a mixture of chemical reaction and diffusion,as well as the temperature and concentration of the leaching solution have an influence on *** work provides a feasible idea for the efficient leaching of Fe from jarosite residue.

关键词： Jarosite residue Electric filed Leaching kinetics

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Effects of hydralazine and valproate on the expression of E-cadherin gene and the invasiveness of QBC939 cells

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Frontiers of Medicine 2009年第2期3卷 153-157页

作者： Hong LI shaoqin chen Yi SHU Yongjun chen Ying SU Xin WANG Shengquan ZOU Department of General Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

To clarify the effect of DNA methylation and histone deacetylase inhibitors on the expression of the E-cadherin gene and the invasiveness of the QBC939 cells,the QBC939 cells were separately treated with hydralazine,valproate,or combination of the two *** expression of E-cadherin mRNA and protein was examined by reverse transcription-polymerase chain reaction(RT-PCR),and Western *** methylation status of the promoter region of the gene was detected by methylation-speciﬁc PCR(MSP).The invasiveness of QBC939 cells was tested by transwell *** was found that the promoter region of the E-cadherin gene of QBC939 cells was *** alone could not contribute to demethylation of the gene,whereas hydralazine could make them to be partly ***,the methylation status of the gene could be thoroughly reversed by using valproate and hydralazine in ***’s more,it was conﬁrmed that the E-cadherin gene of QBC939 cells could not be transcriptionally reactivated by valproate alone,whereas hydralazine alone could induce moderate reex-pression of the ***,the addition of valproate to hydralazine could result in robust reexpression of the E-cadherin gene(P=0.000).Likewise,the invasiveness of the QBC939 cells was sharply decreased by treatment with two drugs in combination and slightly decreased with one drug *** could be concluded that the two drugs have synergistic effect on the demethylation and reexpression of the E-cadherin gene of QBC939 cells,and also on the reduction of the invasiveness of the QBC939 cells.

关键词： DNA methylation inhibitor histone deacety-lase inhibitor bile duct carcinoma E-cadherin

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Boosting solar hydrogen production via electrostatic interaction mediated ***-TiO_(2−x)biohybrid system

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Nano Research 2024年第6期17卷 5390-5398页

作者： Xingxing Lv Weicheng Huang Ya Gao Rui chen Xiaowei chen Danqing Liu Ling Weng Liangcan He shaoqin Liu School of Material Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040China School of Medicine and Health and Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of EducationHarbin Institute of TechnologyHarbin 150001China Department of Physics School of ScienceJimei UniversityXiamen 361021China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046China

Hydrogen is garnering growing attention as a green energy source with zero carbon ***,most hydrogen production technologies still rely on the consumption of fossil fuels and are therefore *** has driven the search for more environmentally friendly methods of hydrogen *** this work,we present an innovative approach to enhance hydrogen generation via electrostatic interaction in the Escherichia coli and defective titanium dioxide(TiO_(2−x))*** method involves narrowing the forbidden bandwidth of TiO2 while introducing defect bands into its conduction band to facilitate visible light absorption and efficient charge *** biohybrid system,consisting of *** and TiO_(2−x),demonstrates a remarkable capability to produce 1.25 mmol of hydrogen within a 3-h timeframe under visible light *** accomplishment signifies a 3.31-fold rise in hydrogen production in comparison to ***,signifying a substantial enhancement in hydrogen production ***,we delve into the alterations in biological metabolites associated with hydrogen production and the changes in electron transfer in different biohybrid *** provides valuable insights into the understanding of the intrinsic mechanisms that drive the *** work introduces a novel and promising avenue for achieving this exciting goal.

关键词： Escherichia coli TiO_(2−x)nanoparticles biohybrid system hydrogen production

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A neural m^(6)A pathway regulates behavioral aggregation in migratory locusts

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Science China(Life Sciences) 2024年第6期67卷 1242-1254页

作者： Xianliang Huang Qing Li Yanan Xu Ang Li Shanzheng Wang Yusheng chen Chunrui Zhang Xia Zhang Hailin Wang Cong Lv Baofa Sun shaoqin Li Le Kang Bing chen School of Life Science Institutes of Life Science and Green DevelopmentHebei UniversityBaoding 071002China College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China Institute of Health Sciences Anhui UniversityHefei 230601China Beijing Institute of Genomics Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100101China

RNA N6-methyladenosine(m^(6)A),as the most abundant modification of messenger RNA,can modulate insect behaviors,but its specific roles in aggregation behaviors remain ***,we conducted a comprehensive molecular and physiological characterization of the individual components of the methyltransferase and demethylase in the migratory locust Locusta *** results demonstrated that METTL3,METTL14 and ALKBH5 were dominantly expressed in the brain and exhibited remarkable responses to crowding or *** individual knockdown of methyltransferases(i.e.,METTL3 and METTL14)promoted locust movement and conspecific attraction,whereas ALKBH5 knockdown induced a behavioral shift toward the solitary ***,global transcriptome profiles revealed that m^(6)A modification could regulate the orchestration of gene expression to fine tune the behavioral aggregation of *** summary,our in vivo characterization of the m^(6)A functions in migratory locusts clearly demonstrated the crucial roles of the m^(6)A pathway in effectively modulating aggregation behaviors.

关键词： RNA methylation N^(6)-methyladenosine transcriptional orchestration aggregation behavior Locusta migratoria

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The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas:report of 9 cases

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Journal of Nanjing Medical University 2007年第6期21卷 398-401页

作者： shaoqin chen Shengquan Zou Qibao Dai Peisheng Huang Weihua Cai Hong Li Department of Oncology First Affiliated Hospital of Fujian Medical University Fuzhou 350005 Fujian Province China Department of General Surgery Affiliated Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology Wuhan 430030 Hubei Province China Department of Pathology First Affiliated Hospital of Fujian Medical University Fuzhou 350005 Fujian Province China

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.

关键词： pancreatic neoplasm solid-pseudopapillary tumor pancreas

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PCR Detection and Sequence Analysis of Torque Teno Sus Virus Strains from Guangdong Province

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Agricultural Biotechnology 2013年第3期2卷 39-42页

作者： Yuan HUANG Min XU shaoqin chen Xiaohu WANG Hua XIANG Jianfei ZHANG Animal Health Institute Guangdong Academy of Agricultural Sciences/Veterinary Public Health Public Laboratory of Guangdong

[Objective] Torque teno virus （TIT） is a novel virus with negative single-strand DNA discovered in recent years, which is ubiquitous and nonpatho- genie. Torque teno sus virus （TrsuV） is widely prevalent in swine populations, which is considered to be associated with some diseases such as post-weaning multi- systemic wasting syndrome （PMWS）. This study aimed to provided data for epidemiology of Tl＇suV in Guangdong Province. [Method] PCR primers were synthe- sized based on untranslated region （UTR） segment of TYsuV genome, to conduct PCR detection of 14 swine serum samples from two swine farms in Guangdong Province. A total of four PCR products of TrsuV1 and TrsuV2 from two swine farms were selected for cloning, sequencing and analysis. [ Result] Ten TrsuVl pos- itive samples （71% ） and eight TrsuV2 positive samples （57%） were obtained by PCR, including five double-positive samples （36%）. Sequence analysis of PCR products and reference strains showed that the UTR segments of samples GDTI-1 and GDT1-2 were both 305 bp, sharing 90.2% -95.1% similarity with Tl＇suVl reference strain, and the UTR segments of samples GDT2-1 and GDT2-2 were respectively 259 bp and 248 bp, sharing 67.3% - 100% similarity with TrsuV2 refer- ence strain. [ Conclusion] These results conformed that there are at least two types of Tl＇suV in Guangdong Province, with relatively high detection rates in some swine farms. Despite the putative harmlessness of Tl＇suV, the public health significance of TTsuV is noticeable due to its potential pathogenicity.

关键词： Torque teno sus virus PCR Detection Sequence analysis

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Synergy of DNA methylation and histone deacetylase inhibitors in the re-expression of RASSF1A and P16 genes silenced in QBC cells

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The Chinese-German Journal of Clinical Oncology 2008年第11期7卷 627-630页

作者： Hong Li shaoqin chen Yi Shu Yongjun chen, Ying Su Xin Wang Shengquan Zou Department of General Surgery Tongji Hospital Tongji Medical College Huazhong Science ＆ TechnologyUniversity Wuhan 430030 China

Objective: To investigate the effects of DNA methylation and histone deacetylase inhibitors in the re-expression of P16 and RASSIF1A of QBC939. Methods: The QBC939 cells were treated with hydralazine and valproate either alone or combined, and the control group was added with RPIM-1640 culture medium. After 48 h, the expression of P16 and RASSF1A genes were evaluated by reverse transcription-PCR, Western blot, and the methylation status of the two genes were detected with MSP (methylation specific PCR). Results: Hydralazine and valproate could induce demethylation of the promoter region of the two genes, and could make them re-active. The expressions of P16 and RASSF1A of cells treated with both drugs were higher than that of the cells treated with either hydralazine or valproate (P < 0.01). There was no RASSF1A gene, and few P16 gene expressing in the control group. The demethylation effect could be found in the groups treated with hydralazine or both drugs, whereas no demethylation effect happened in the valproate group. Conclusion: The two drugs could synergistically re-express P16 and RASSF1A genes silenced in QBC939, and they exerted a great anti-tumour effect on QBC cells.

关键词： DNA methyltransferase inhibitor histone deacetylase inhibitor DNA hypermethylation gene re-expression

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粤港政府知识产权保护与管理的现状及其比较分析

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科学学与科学技术管理 2005年第11期26卷 31-38页

作者：李平陈少芹李砚忠汕头大学地方政府发展研究所广东汕头515063

作为技术创新动力的知识产权成为国家间以及地区间相互竞争的重要资源,因此,为知识产权的创造、利用和保护营造良好的政策环境便成为政府管理不可或缺的内容。从中观政府管理及政策的角度,对粤港两地政府知识产权保护和管理的现状进行... 详细信息

作为技术创新动力的知识产权成为国家间以及地区间相互竞争的重要资源,因此,为知识产权的创造、利用和保护营造良好的政策环境便成为政府管理不可或缺的内容。从中观政府管理及政策的角度,对粤港两地政府知识产权保护和管理的现状进行了比较分析,并试图以此为借鉴对当前我国知识产权保护和管理中普遍存在的不足提出政策性建议。

关键词：粤港政府知识产权保护与管理

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Profile of *** chen

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Science China(Life Sciences) 2024年第10期67卷 2062-2063页

作者： chen, Songlin Yellow Sea Fisheries Res Inst Qingdao Peoples R China

For decades,*** has been engaged in fish germplasm preservation,sex control and research focusing on molecular breeding for disease *** discovered the first sex-specific molecular marker of fish(chen et al.,2007),deciphered the first fish genome(Chinese tongue sole)in China,revealed the sex determination mechanism in fish(chen et al.,2014),and created molecular sex control *** also discovered the molecular mechanism of metamorphosis in flatfish(Shao et al.,2017)and developed China's first fish disease-resistant breeding gene chip,“YUXIN No.1”.

关键词： technology breeding

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基于MicroStation Ⅴ8的立体采编系统开发与实现

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测绘信息与工程 2006年第2期31卷 17-19页

作者：王密陈克明陈少勤楼燕敏武汉大学测绘遥感信息工程国家重点实验室武汉市珞喻路129号430079 浙江省基础地理信息中心浙江省第二测绘院杭州市保俶北路83号310012

在VC环境下进行MicroStation的二次开发,实现了一套基于MicroStationⅤ8平台的全数字摄影测量立体采编系统。该系统在核线立体模型建立之后,利用摄影测量基本原理解算三维坐标,直接通过鼠标进行立体切准和量测,实现了面向地物要素的立... 详细信息

在VC环境下进行MicroStation的二次开发,实现了一套基于MicroStationⅤ8平台的全数字摄影测量立体采编系统。该系统在核线立体模型建立之后,利用摄影测量基本原理解算三维坐标,直接通过鼠标进行立体切准和量测,实现了面向地物要素的立体采集和立体编辑。

关键词： MicroStation VBA 二次开发语言数字摄影测量立体采编

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