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Fast sulfurization of nickel foam-supported nickel-cobalt carbonate hydroxide nanowire array at room temperature for hydrogen evolution electrocatalysis

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ELECTROCHIMICA ACTA 2019年 318卷 252-261页

作者： Lu, Wangting Li, xuwen Wei, Feng Cheng, Kun Li, Wenhui Zhou, Youhua Zheng, Wanquan Pan, Lei zhang, Geng Jianghan Univ Inst Interdisciplinary Res Wuhan 430056 Hubei Peoples R China Jianghan Univ Sch Chem & Environm Engn Wuhan 430056 Hubei Peoples R China Univ Paris Saclay Univ Paris Sud Inst Sci Mol Orsay CNRS F-91405 Orsay France Jianghan Univ Sch Life Sci Wuhan 430056 Hubei Peoples R China Huazhong Agr Univ Coll Sci Dept Chem Wuhan 430070 Hubei Peoples R China

Transition metal sulfide is considered as a kind of promising noble metal-free material for hydrogen evolution reaction (HER). However, most of conventional sulfurization methods require high temperature and/or long reaction time. Herein, a sulfurization strategy at room temperature (25 degrees C) by using Na2S in aqueous solution is applied to sulfurize nickel foam-supported nickel-cobalt carbonate hydroxide nanowire array, during which amorphous sulfide gradually forms on the surface of nanowire and finally replaces the nanowire completely. It is found that the electrode sulfurized for 5 min in which only a thin sulfide layer is formed presents nearly identical catalytic performance for HER with the electrode that is sufficiently sulfurized for 120 min. The electrode sulfurized at 25 degrees C for 5 min only needs an overpotential of 100 mV to achieve hydrogen evolution current at 10 mA cm(-2) in 1 M KOH, and negligible loss of activity is observed after working at a current density of 20 mA cm(-2) for 25 h. The interface between carbonate hydroxide and sulfide is considered to play an important role in the catalysis of HER. The observation in this work can provide new insights into the sulfurization process and the role of sulfide in the process of HER. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： HER Sulfide Amorphous Interface DFT

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Surface interaction mechanisms in mineral flotation: Fundamentals, measurements, and perspectives

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ADVANCES IN COLLOID AND INTERFACE SCIENCE 2021年 295卷 102491-102491页

作者： Xie, Lei Wang, Jingyi Lu, Qiuyi Hu, Wenjihao Yang, Diling Qiao, Chenyu Peng, xuwen Peng, Qiongyao Wang, Tao Sun, Wei Liu, Qi zhang, Hao Zeng, Hongbo Cent South Univ Sch Minerals Proc & Bioengn Changsha 410083 Peoples R China Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Cent South Univ Sch Met & Environm Changsha 410083 Peoples R China

As non-renewable natural resources, minerals are essential in a broad range of biological and technological applications. The surface interactions of mineral particles with other objects (e.g., solids, bubbles, reagents) in aqueous suspensions play a critical role in mediating many interfacial phenomena involved in mineral flotation. In this work, we have reviewed the fundamentals of surface forces and quantitative surface property-force relationship of minerals, and the advances in the quantitative measurements of interaction forces of mineral-mineral, bubble-mineral and mineral-reagent using nanomechanical tools such as surface forces apparatus (SFA) and atomic force microscope (AFM). The quantitative correlation between surface properties of minerals at the solid/water interface and their surface interaction mechanisms with other objects in complex aqueous media at the nanoscale has been established. The existing challenges in mineral flotation such as characterization of anisotropic crystal plane or heterogeneous surface, low recovery of fine particle flotation, and in-situ electrochemical characterization of collectorless flotation as well as the future work to resolve the challenges based on the understanding and modulation of surface forces of minerals have also been discussed. This review provides useful insights into the fundamental understanding of the intermolecular and surface interaction mechanisms involved in mineral processing, with implications for precisely modulating related interfacial interactions towards the development of highly efficient industrial processes and chemical additives.

关键词： Bubble-mineral-reagent interaction Mineral flotation Dewatering process Surface interactions atomic force microscope (AFM) Surface forces apparatus (SFA)

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浙江知识产权公共服务数字化集成平台设计与研究

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中国科技纵横 2024年第6期 26-29页

作者：张潞璐曹杭平黄健民朱明陈旭文傅潇杭国家市场监管技术创新中心(市场监管数字化研究与应用) 浙江杭州 310000 浙江省标准化研究院浙江杭州 310000

建设知识产权公共服务数字化集成平台是深化知识产权服务事项改革的重要方式,为进一步提升浙江知识产权公共服务数字化集成水平,以"知识产权在线"为例,充分运用"互联网+知识产权"、大数据和信息化技术,分析建设背... 详细信息

建设知识产权公共服务数字化集成平台是深化知识产权服务事项改革的重要方式,为进一步提升浙江知识产权公共服务数字化集成水平,以"知识产权在线"为例,充分运用"互联网+知识产权"、大数据和信息化技术,分析建设背景与实际需求,提出浙江融合优化知识产权各类资源和服务的知识产权平台设计与建设方式,为全国类似平台的功能设计以及服务能力和效率的提升提供经验借鉴.

关键词：知识产权集成公共服务数字化

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垃圾焚烧厂垃圾池池壁侧压力系数取值研究

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武汉大学学报（工学版） 2021年第S02期54卷 21-25页

作者：申加胜张兰春安旭文魏亚庆郭礼鹏山东电力工程咨询院有限公司山东济南250013 武汉大学土木建筑工程学院湖北武汉430072 中国电力工程顾问集团华北电力设计院有限公司北京100120

为适应我国城市生活垃圾焚烧处理工程技术的发展需要,满足生活垃圾焚烧厂垃圾池结构设计的安全性和经济性要求,对垃圾池结构的荷载取值进行了研究。根据垃圾池结构的防腐要求,设计了垃圾池荷载的监测方案,在湖南某生活垃圾焚烧厂垃圾池... 详细信息

为适应我国城市生活垃圾焚烧处理工程技术的发展需要,满足生活垃圾焚烧厂垃圾池结构设计的安全性和经济性要求,对垃圾池结构的荷载取值进行了研究。根据垃圾池结构的防腐要求,设计了垃圾池荷载的监测方案,在湖南某生活垃圾焚烧厂垃圾池内布置测点进行监测,获得了垃圾池内底板竖向压力和池壁侧向压力的实测数据,并对不同垃圾堆高下垃圾池池底竖向压力、池壁侧向压力进行了统计分析,提出了垃圾焚烧厂垃圾池壁侧压力系数的取值建议方案。研究成果可为生活垃圾焚烧厂房垃圾池结构的设计提供基础资料和技术支持。

关键词：垃圾焚烧厂竖向压力侧向压力统计分析侧压力系数

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恙虫病临床特征及重症恙虫病的早期诊断

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热带病与寄生虫学 2023年第6期21卷 321-325页

作者：李翔马仲序李国忠姜建杰付旭文张乐云南省传染性疾病临床医学中心昆明市第三人民医院

目的了解恙虫病临床特征，探讨重症恙虫病诊断的早期临床指征。方法收集昆明市第三人民医院2017年1月至2021年12月恙虫病确诊患者的临床资料、胸部CT影像学及实验室检查结果；将恙虫病患者分为非重症恙虫病组（简称非重症组）与重症... 详细信息

目的了解恙虫病临床特征，探讨重症恙虫病诊断的早期临床指征。方法收集昆明市第三人民医院2017年1月至2021年12月恙虫病确诊患者的临床资料、胸部CT影像学及实验室检查结果；将恙虫病患者分为非重症恙虫病组（简称非重症组）与重症恙虫病组（简称重症组），利用logistic回归法分析重症恙虫病的早期临床指征。结果研究共纳入恙虫病患者181例，其中非重症组104例，重症组77例。所有患者均发现皮肤焦痂，最常见于躯干，占47.5%（86/181）。患者均出现发热，其他临床表现为头痛、咳嗽、腹痛、肌肉酸痛和呼吸困难。胸部CT影像表明，所有患者胸腔积液的发生率为49.7%（90/181），重症组和非重症组发生率分别为67.5%（52/77）和36.5%（38/104），差异有统计学意义（χ2=17.001,P<0.05）。实验室检查中，重症组外周血中性粒细胞绝对值、谷草转氨酶、C反应蛋白、降钙素原、乳酸脱氢酶、D-二聚体及白细胞介素-6水平高于非重症组，外周血血小板计数低于非重症组，差异均有统计学意义（Z=2.858、-3.870、-5.937、-6.546、-4.153、-4.802、-5.119、-5.039,P均<0.05）。回归分析结果表明，血清谷草转氨酶、降钙素原、白细胞介素-6升高以及存在胸腔积液与重症恙虫病发生有相关性；受试者工作特征曲线（receiver operating characteristic curve,ROC）曲线下面积为0.839，其敏感度为62.3%，特异度为96.2%。结论患者出现发热伴随皮肤焦痂应考虑恙虫病的可能，血清谷草转氨酶、降钙素原、白细胞介素-6升高和胸部CT显示胸腔积液可作为考虑恙虫病发展为重症的早期指标，应予以关注，对有重症倾向的患者及早诊治，以期降低病死率。

关键词：恙虫病立克次体临床特征重症病例早期诊断

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Ladderane records over the last century in the East China sea: Proxies for anammox and eutrophication changes

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WATER RESEARCH 2019年第Jun.1期156卷 297-304页

作者： Zhao, Zongshan Cao, Yali Fan, Ying Yang, Haili Feng, xuwen Li, Li zhang, Hailong Xing, Lei Zhao, Meixun Ocean Univ China Inst Adv Ocean Study Minist Educ Key Lab Marine Chem Theory & Technol Qingdao 266100 Shandong Peoples R China Qingdao Natl Lab Marine Sci & Technol Lab Marine Ecol & Environm Sci Qingdao 266237 Shandong Peoples R China Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol CAS Key Lab Biobased Mat Qingdao 266101 Shandong Peoples R China Jiangxi Inst Anal & Test Nanchang 330029 Jiangxi Peoples R China State Ocean Adm Inst Oceanog 2 Hangzhou 310012 Zhejiang Peoples R China

Anaerobic ammonium oxidation (anammox), an important process for converting fixed nitrogen to N-2, plays an important role in the present-day marine nitrogen cycle. However, little is known about anammox activities in the past, especially in regions that were strongly affected by human activities, evidenced by eutrophication and hypoxia, which promote anammox bacteria growth. In this study, ladderanes have been measured in a sediment core and suspended particulate matter (SPM) in the East China Sea (ECS), to reconstruct the anammox record and to evaluate its responses to eutrophication and hypoxia. The detection and distribution of different ladderane lipids in SPM provide additional evidence that ladderanes were mostly produced in the water column and could reflect anammox activities. Summed ladderane content from the core varied between 11 and 300 ng/g dry weight (dw) sediment, with C20-[5]-ladderane fatty acid methyl esters (FAME) as the predominant compound (5-150 ng/g dw), followed by C20-[3]-ladderane FAME (1-110 ng/g dw), C18-[3]-ladderane FAME (1-32 ng/g dw) and 08 -[5]-ladderane FAME (3-11 ng/g dw). The detection of ladderanes over the last century indicate the existence of anammox in the past. The rapidly increasing trend of ladderanes since the 1960s correlates with an increase in phytoplankton biomarkers (2 Sigma(B + D + A), brassicasterol (B), dinosterol (D) and C-37 alkenones (A)), indicating that eutrophication exacerbated anammox growth. The co-variation between our ladderane record and published records of low-oxygen tolerant foraminiferal microfossils and hypoxia events over the past 60 years suggested that sediment ladderanes are a useful indicator for past changes of oxygen depletion or hypoxia in the ECS. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Anammox Ladderanes Nitrogen cycle Phytoplankton Hypoxia

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FilterLAP: Filtering False-positive Mutation Calls via a Label Propagation Framework

FilterLAP: Filtering False-positive Mutation Calls via a Lab...

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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Wang, xuwen Zhu, Xiaoyan Xiao, Xiao Wang, Shenjie zhang, Xuanping Lai, Xin Wang, Jiayin Xi An Jiao Tong Univ Sch Comp Sci & Technol Xian Peoples R China Xi An Jiao Tong Univ Shaanxi Engn Res Ctr Med & Hlth Big Data Xian Peoples R China Xi An Jiao Tong Univ Sch Publ Policy & Adm Xian Peoples R China

ISBN: (纸本)9781728118673

Benefiting from the recent advantages of genomic sequencing, detecting genomic mutations becomes a routine work in precise diagnoses and treatments for cancers. In clinical practices, many factors, such as tumor purity, clonal structure, etc., interfere the performance of calling mutations. The computational pipelines prefer to sensitively report the candidate calls, while a filter is applied for removing the false-positive calls. The existing filters rely on the whole genome/exome sequencing data, which can provide sufficient samples for training the filters. However, the gene-panel sequencing is more popular in clinical practices, but there is no practical filter for limited training samples. In light of this, we develop a semi-learning filter for gene-panel sequencing data, FilterLAP, which implemented via a label propagation framework. Given few labeled samples with a set of unlabeled ones, its basic idea is to predict the label information of unlabeled nodes from the label information of labeled nodes, and establishes a complete graph model by using the relationship between samples, by combining transductive inference with label propagation algorithm. For each node in the network, tags are propagated to adjacent nodes according to similarity and the probability distribution of similar nodes tends to be similar and can be divided into a class. We perform multiple sets of experiments on gene-panel sequencing data captured from Illumina platform. FilterLAP outperforms on both SNV and INDEL filtering, where the AUCs reach 0.90-0.97, and the average accuracies on overall mutation calls are over 90%. Comparing to GATK hard filters, FilterLAP present a 5% improvement on accuracy. These results demonstrate that the proposed method can better reduce the false positive mutation calls on gene-panel sequencing data. In addition, it is stable and efficient, which can be used as a practical tool for mutation call filtering for gene-panel sequencing data.

关键词： Cancer genomics NGS data analysis Gene-panel sequencing Mutation Filter transductive inference Label propagation

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A Micro-Environment Regulator for Filling the Clinical Treatment Gap after a Glioblastoma Operation

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ADVANCED HEALTHCARE MATERIALS 2022年第3期11卷 2101578-2101578页

作者： zhang, Yiwen You, Haoyu Wang, Yaoben Chen, Qinjun Guo, Qin Chu, Yongchao Li, Chao Zhou, Wenxi Chen, Hongyi Liu, Peixin Wang, Yu Zhao, Zhenhao Zhou, Zheng Luo, Yifan Li, xuwen zhang, Tongyu Song, Haolin Li, Chufeng Su, Boyu Sun, Tao Bi, Yunke Yu, Lin Jiang, Chen Fudan Univ Sch Pharm Dept PharmaceutState Key Lab Med Neurobiol & MOE Inst Brain SciMinist EducKey Lab Smart Drug Del Shanghai 201203 Peoples R China Fudan Univ Dept Macromol Sci State Key Lab Mol Engn Polymers Shanghai 200438 Peoples R China Shanghai Jiao Tong Univ Sch Med Shanghai Gen Hosp Dept Neurosurg Shanghai 201203 Peoples R China

The rapid postoperative recurrence and short survival time of glioblastoma (GBM) patients necessitate immediate and effective postoperative treatment. Herein, an immediate and mild postoperative local treatment strategy is developed that regulates the postoperative microenvironment and delays GBM recurrence. Briefly, an injectable hydrogel system (imGEL) loaded with Zn(II)(2)-AMD3100 (AMD-Zn) and CpG oligonucleotide nanoparticles (CpG NPs) is injected into the operation cavity, with long-term function to block the recruitment of microglia/ macrophages and activate cytotoxic T cells. The finding indicated that the imGEL can regulate the immune microenvironment, inhibit GBM recurrence, and gain valuable time for subsequent adjuvant clinical chemotherapy.

关键词： drug delivery glioblastoma injectable hydrogels microenvironments post-operative therapy

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HKUST封装磷钼酸催化乙二醇与异丁烯选择性醚化的研究

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南京工业大学学报（自然科学版） 2022年第2期44卷 141-147页

作者：蒙旭雯李纪元周广飞张竹修汤吉海崔咪芬乔旭南京工业大学化工学院材料化学工程国家重点实验室江苏南京211800

采用一锅法制备金属有机框架材料HKUST封装不同含量磷钼酸的HPMo@HKUST催化剂,通过X线衍射、傅里叶变换红外光谱、N2吸附脱附、吡啶红外光谱、热分析等手段对催化剂的晶型、结构、孔径、酸位、热稳定性等进行表征,考察HPMo@HKUST在乙二... 详细信息

采用一锅法制备金属有机框架材料HKUST封装不同含量磷钼酸的HPMo@HKUST催化剂,通过X线衍射、傅里叶变换红外光谱、N2吸附脱附、吡啶红外光谱、热分析等手段对催化剂的晶型、结构、孔径、酸位、热稳定性等进行表征,考察HPMo@HKUST在乙二醇与异丁烯选择性醚化制备乙二醇单叔丁基醚反应中的催化性能并进行工艺优化。结果表明:HPMo@HKUST催化剂成功封装磷钼酸,在维持HKUST晶型结构的同时,提高了催化剂的稳定性,且引入的Brönsted酸位能提高催化乙二醇与异丁烯选择性醚化的催化活性与产物选择性。乙二醇单叔丁基醚的选择性随着磷钼酸负载量的增加先降低后升高。10%HPMo@HKUST催化剂在异丁稀与乙二醇摩尔比6、催化剂用量占乙二醇质量的30%、100℃反应1 h条件下,乙二醇转化率为88%,乙二醇单叔丁基醚选择性为81%。

关键词：磷钼酸 HKUST 乙二醇单叔丁基醚异丁烯选择性醚化

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薤中新的甾体皂苷类化学成分

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高等学校化学学报 2021年第6期42卷 1742-1753页

作者：杨依然姚华闫江红孙志恒张余房雪晴李绪文金永日吉林大学化学学院长春130012 吉林大学中日联谊医院长春130033 吉林省中医药科学院第一临床医院长春130021 新南威尔士大学材料科学学院悉尼2033澳大利亚

从薤(Allium chinense ***)的乙醇提取物中分离得到6个新甾体皂苷类化合物,通过波谱数据及理化性质分析,鉴定其分别为5α-cholano-22,16-内酯-3-O-β-D-吡喃葡萄糖基-(1→2)-[β-D-吡喃葡萄糖基-(1→3)]-β-D-吡喃葡萄糖基(1→4)-β-D-... 详细信息

从薤(Allium chinense ***)的乙醇提取物中分离得到6个新甾体皂苷类化合物,通过波谱数据及理化性质分析,鉴定其分别为5α-cholano-22,16-内酯-3-O-β-D-吡喃葡萄糖基-(1→2)-[β-D-吡喃葡萄糖基-(1→3)]-β-D-吡喃葡萄糖基(1→4)-β-D-吡喃半乳糖苷(1)、6-酮-5α-cholano-22,16-内酯-3-O-β-D-吡喃木糖基-(1→4)-[α-L-吡喃阿拉伯糖基-(1→6)]-β-D-吡喃葡萄糖苷(2)、(25R)-26-O-β-D-吡喃葡萄糖基-5α-呋喃甾烷-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-[β-D-吡喃葡萄糖基-(1→3)]-β-D-吡喃葡萄糖基(1→4)-β-D-吡喃半乳糖苷(3)、(25R)-6-酮-26-O-β-D-吡喃葡萄糖基-5α-呋喃甾烷-3β,22α,26-三醇-3-O-α-L-吡喃木糖基-(1→4)-β-D-吡喃葡萄糖苷(4)、(25R)-6-酮-5α-呋喃甾烷-3β,22α,24β,26-四醇-3-O-β-D-吡喃木糖基-(1→4)-[α-L-吡喃阿拉伯糖基-(1→6)]-β-D-吡喃葡萄糖苷(5)和(25R)-5α-呋甾-2α,3β,22α,26-四醇-26-O-β-D-吡喃葡萄糖苷(6).化合物1和2的皂苷元骨架在天然产物中首次分离得到.选用H_(2)O_(2)诱导PC12细胞神经氧化损伤模型,初步考察了6种新的呋甾型化合物的抗氧化活性,实验结果表明,化合物3对由H_(2)O_(2)诱导的细胞氧化损伤有显著的保护效果.

关键词：薤呋甾皂苷结构鉴定细胞活性抗氧化能力

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