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Surface reconstruction of heterostructures in alkaline medium towards enhanced electrocatalytic hydrogen evolution

Rare Metals 2024年第6期43卷 2636-2647页

作者： Ming-Yang Yang Ji Yuan Xue-Lian Fu Jing-Jing Chen Jing Hu Zhou-guang lu Chen Liu guangdong Research Center for Interfacial Engineering of Functional Materials Shenzhen Key Laboratory of Polymer Science and TechnologyShenzhen Key Laboratory of Energy Electrocatalytic MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials Department of Materials Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Constructing heterostructures has proved to be a successful strategy to fabricate electrocatalysts with high efficiency for water ***,the structure evolution in alkaline hydrogen evolution reaction lacks investigation and the specific active center remains ***,we take the well-designed Ni_(3)S_(2)@VO_(2) heterostructures as a model to investigate the electrocatalytic activity and the surface reconstruction process of heterostructure catalysts in alkaline *** Ni_(3)S_(2)@VO_(2) heterostructures,with Ni_(3)S_(2) nanorods as the core and VO_(2) nanoflakes as the shell,coupled with the high conductive Ni_(3)S_(2),the hydrophilic VO_(2) and modulated electronic structures at the interfaces,exhibited prominent activity and superior stability at various current ***,the ex-situ characterizations confirmed that the surface reconstruction from Ni_(3)S_(2)@VO_(2) into Ni_(3)S_(2)@amorphous-Ni(OH)_(2) in alkaline media could optimize the water dissociation barrier and exposed large active area,thereby contributing to improved electrocatalytic *** study not only introduces novel high-performance electrocatalysts for hydrogen evolution reaction(HER),but also provides a new avenue for re-examining hetero-structural catalysts in alkaline solutions.

关键词： Heterostructures Ni_(3)S_(2)@VO_(2) Surface reconstruction Water dissociation Alkaline hydrogen evolution

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Two missense STK11 gene variations impaired LKB1/adenosine monophosphate-activated protein kinase signaling in Peutz-Jeghers syndrome

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1532-1546页

作者： Jin Liu Si-Cong Zeng An Wang Hai-Ying Cheng Qian-Jun Zhang guang-Xiu lu Hunan guangxiu Hospital Hunan Normal UniversityChangsha 410000Hunan ProvinceChina Scientific Research Department Reproductive and Genetic Hospital of Citic-XiangyaChangsha 410000Hunan ProvinceChina

BACKGROUND Peutz-Jeghers syndrome(PJS)is a rare hereditary neoplastic disorder mainly associated with serine/threonine kinase 11(STK11/LKB1)gene *** genetic testing can protect a patient’s offspring from mutated genes;however,some variations in this gene have been interpreted as variants of uncertain significance(VUS),which complicate reproductive decision-making in genetic *** To identify the pathogenicity of two missense variants and provide clinical *** Whole exome gene sequencing and Sanger sequencing were performed on the peripheral blood of patients with PJS treated at the Reproductive and Genetic Hospital of *** was employed to predict the protein structure,conservation,and pathogenicity of the two missense variation sites in patients with ***,plasmids were constructed and transfected into HeLa cells to observe cell *** differences in signal pathway expression between the variant group and the wild-type group were compared using western blot and *** analysis was performed using one-way analysis of variance.PG(***297Gly)and c.733C>T(***245Phe)]in 9 unrelated PJS families who were seeking reproductive *** two missense VUS were located in the catalytic domain of serine/threonine kinase,which is a key structure of the liver kinase B1(LKB1)*** vitro experiments showed that the phosphorylation levels of adenosine monophosphate-activated protein kinase(AMPK)at Thr172 and LKB1 at Ser428 were significantly higher in transfected variation-type cells than in wild-type *** addition,the two missense STK11 variants promoted the proliferation of HeLa *** immunohistochemical analysis showed that phosphorylated-AMPK(Thr172)expression was significantly lower in gastric,colonic,and uterine polyps from PJS patients with misse

关键词： Missense STK11 Peutz-Jeghers syndrome Rare disease Genetic counseling Assisted reproductive technique

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A Novel Two-dimensional Low-redundancy Array Design for Solar Radio Imaging

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Research in Astronomy and Astrophysics 2024年第9期24卷 178-189页

作者： Weidan Zhang Bing Wang Zhao Wu guang lu Yao Chen Yan Fabao Laboratory for Electromagnetic Detection Institute of Space SciencesShandong UniversityWeihai 264209China Center for Integrated Research on Space Science Astronomyand PhysicsInstitute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China

The radioheliograph is an extensive array of antennas operating on the principle of aperture synthesis to produce images of the *** image acquired by the telescope results from convoluting the Sun’s true brightness distribution with the antenna array’s directional *** imaging quality of the radioheliograph is affected by a multitude of factors,with the performance of the“dirty beam”being simply one *** factors such as imaging methods,calibration techniques,clean algorithms,and more also play a significant influence on the resulting image *** the layout of the antenna array directly affects the performance of the dirty beam,the design of an appropriate antenna configuration is critical to improving the imaging quality of the *** on the actual needs of observing the Sun,this work optimized the antenna array design and proposed a twodimensional low-redundancy *** proposed array was compared with common T-shaped arrays,Y-shaped arrays,uniformly spaced circular arrays,and three-arm spiral *** simulations and experiments,their performance in terms of sampling point numbers,UV coverage area,beam-half width,sidelobe level,and performance in the absence of antennas are compared and *** was found that each of these arrays has its advantages,but the two-dimensional low-redundancy array proposed in this paper performs best in overall *** has the shortest imaging calculation time among the array types and is highly robust when antennas are missing,making it the most suitable choice.

关键词： interferometers methods:observational techniques:interferometric

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Defects in phospholipase C zeta cause polyspermy and low fertilization after conventional IVF:not just ICSI failure

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Asian Journal of Andrology 2024年第2期26卷 175-182页

作者： Jian-Fang Che Hui-Xia Wu Si-Cong Zeng Yue-Ren Wu Jing Dai De-Hua Cheng Fei Gong guang-Xiu lu Ge Lin Can Dai School of Medicine Hunan Normal UniversityChangsha 410013China Reproductive and Genetic Hospital of CITIC-Xiangya Changsha 410008China Clinical Research Center for Reproduction and Genetics in Hunan Province Changsha 410078China National Engineering and Research Center of Human Stem Cell Changsha 410205China

Phospholipase C zeta(PLC)is a key sperm-borne oocyte-activating factor that triggers Ca^(2+)oscillations and the subsequent block to polyspermy following gamete *** in PLCZ1,the gene encoding PLCζ,cause male infertility and intracytoplasmic sperm injection(ICSI)fertilization failure;and PLCζ expression and localization patterns are significantly correlated with ICSI fertilization rate(FR).However,in conventional in vitro fertilization(cIVF),whether and how sperm PLCζ affects fertilization remain ***,we identified one previously reported and two novel PLCZ1 mutations associated with polyspermy in vitro that are characterized by excessive sperm-zona binding and a delay in pronuclei(PN)*** staining and oocyte activation testing revealed that virtually all spermatozoa from patients lacked functional PLCζ and were thus unable to evoke Ca^(2+) *** with an artificial oocyte activation treatment successfully rescued the polyspermic phenotype and resulted in a live ***,we analyzed PLCζ in an additional 58 males after cIVF treatment in the Reproductive and Genetic Hospital of CiTiC-Xiangya(Changsha,China)between February 2019 and January *** found that the proportion of spermatozoa that expressed PLCζ was positively correlated with both 2PN rate and total *** optimal cutoff value below which males were likely to experience low FR(total FR≤30%)after clVF was 56.7%for the proportion of spermatozoa expressing *** study expands the mutation and the phenotypic spectrum of PLCZ1 and further suggests that PLCζ constitutes a promising biomarker for identifying low FRs cases in cIVF due to sperm-related oocyte activation deficiency and that sperm PLCζ analysis may benefit the widermale population and not onlymen with IcsI failure.

关键词： conventional IVF gene variants PLCζ polyspermy

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新型氮空位g-C_(3)N_(4)/Cu_(2)(OH)_(2)CO_(3)异质结的构建及广谱光催化降解有机染料的性能

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材料导报 2024年第19期38卷 16-21页

作者：梁红玉王斌陆光辽宁石油化工大学环境与安全工程学院辽宁抚顺113001 上海蓝滨石化设备有限责任公司上海201518 辽宁石油化工大学土木工程学院辽宁抚顺113001

本研究设计了一款不含贵金属、宽光谱响应的氮空位异质结催化剂g-C_(3)N_(4)/Cu_(2)(OH)_(2)CO_(3)(VCN/Cu),并考察了其对罗丹明B(RhB)的光催化降解性能。采用扫描电镜/透镜(SEM/TEM)、X射线衍射光谱(XRD)、X光电子能谱(XPS)、荧光光谱(... 详细信息

本研究设计了一款不含贵金属、宽光谱响应的氮空位异质结催化剂g-C_(3)N_(4)/Cu_(2)(OH)_(2)CO_(3)(VCN/Cu),并考察了其对罗丹明B(RhB)的光催化降解性能。采用扫描电镜/透镜(SEM/TEM)、X射线衍射光谱(XRD)、X光电子能谱(XPS)、荧光光谱(PL)等分析手段对产物形貌、结构、元素能态等性质进行了表征。结果表明,VCN/Cu异质结催化剂对250~1800 nm的光均有较强吸收。VCN/Cu光催化降解RhB最大反应速率常数达到0.052 min^(-1),分别是Cu_(2)(OH)_(2)CO_(3)和g-C_(3)N_(4)的12.7倍和5.8倍,且具有优异的光催化稳定性。Cu_(2)(OH)_(2)CO_(3)一方面作为红外光吸收材料,提高了对太阳光全光谱的利用率;另一方面与VCN构成异质结,提高了光生电子-空穴的分离效率,同时VCN上的氮空位强化了对光生电子的捕获、对氧的吸附及还原作用。此外,本研究还考察了VCN/Cu异质结催化剂光催化降解RhB的机理。

关键词：石墨相氮化碳碱式碳酸铜有机染料氮空位光催化

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自然环境老化聚氯乙烯和橡胶微粒对邻苯二甲酸酯类塑化剂的吸附解吸行为

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环境科学 2024年第8期45卷 4946-4955页

作者：朱思甫刘建超陆光华河海大学环境学院浅水湖泊综合治理与资源开发教育部重点实验室南京210098

水环境中微塑料(MPs)与塑化剂共存形成复合污染,但在自然条件下MPs与塑化剂吸附解吸行为机制尚不清楚.以聚氯乙烯(PVC)和橡胶为目标MPs,表征其在大气暴露和湖泊沉积掩埋环境下老化1a后的形貌特征变化,探究MPs老化前后对共存邻苯二甲酸酯... 详细信息

水环境中微塑料(MPs)与塑化剂共存形成复合污染,但在自然条件下MPs与塑化剂吸附解吸行为机制尚不清楚.以聚氯乙烯(PVC)和橡胶为目标MPs,表征其在大气暴露和湖泊沉积掩埋环境下老化1a后的形貌特征变化,探究MPs老化前后对共存邻苯二甲酸酯(PAEs)类塑化剂的吸附和解吸行为.结果表明,MPs在大气环境暴露和沉积环境掩埋后表面更加粗糙,表现出多孔聚合物的特征,在大气环境下PVC和橡胶羰基指数(CI)分别增加了62.2%和321.2%,而沉积环境分别增加了51.1%和223.1%,大气环境暴露能够加速MPs的老化过程.PAEs通过疏水作用吸附在MPs表面,且吸附量与其疏水特性显著正相关.老化后PVC对PAEs的吸附容量及吸附速率受到抑制.老化促进橡胶对强疏水性PAEs类塑化剂的吸附,抑制了其对弱疏水性PAEs的吸附.环境老化过程降低橡胶对强疏水性PAEs的解吸量,增强橡胶对弱疏水性PAEs的吸附可逆性,提高了PVC对PAEs的解吸率.

关键词：聚氯乙烯(PVC) 邻苯二甲酸酯(PAEs) 橡胶老化吸附解吸

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清热解毒法治疗原发性高血压病临床随机对照试验有效性和安全性的Meta分析

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中医临床研究 2024年第7期16卷 115-123页

作者：卢广张鹏湖北中医药大学湖北武汉430060

目的:评价应用清热解毒法治疗原发性高血压病的有效性和安全性。方法:检索中国知网、万方、维普、中国生物医学文献数据库、PubMed、Embase、the Cochrane Library和Web of Science自建库至2022年10月31日发表的所有使用清热解毒法治疗... 详细信息

目的:评价应用清热解毒法治疗原发性高血压病的有效性和安全性。方法:检索中国知网、万方、维普、中国生物医学文献数据库、PubMed、Embase、the Cochrane Library和Web of Science自建库至2022年10月31日发表的所有使用清热解毒法治疗原发性高血压病的临床随机对照研究,依据Cochrane手册对纳入文献进行数据提取和质量评价,利用RevMan 5.4进行Meta分析。结果:共纳入24篇临床随机对照试验研究进行分析,最后结果显示,联合清热解毒法和西药治疗原发性高血压病比单纯西药治疗的临床疗效更好[OR=3.78,95%CI(2.84,5.04),P <0.000 01],其改善收缩压[SMD=-1.17,95%CI(-1.71,-0.64),P <0.000 1]以及舒张压的疗效[SMD=-0.89,95%CI(-1.37,-0.40),P=0.000 3]比单纯西药治疗效果要好,能够提高证候疗效[OR=3.76,95%CI(2.56,5.53),P <0.000 01]和降低中医症状积分[MD=-0.78,95%CI(-1.00,-0.57),P <0.00001],并且试验组不良反应更少[OR=0.28,95%CI(0.13,0.59),P=0.000 08]。结论:文章对近年来采用清热解毒法治疗原发性高血压病临床随机对照试验的有效性和安全性进行了系统评价和Meta分析,表明在西药的基础上使用清热解毒类中药能够有效提高对原发性高血压病的临床疗效,缓解患者症状,改善生活质量,且其安全性较单独西药治疗更好。鉴于本次研究纳入的原始文献自身的局限性,临床应用时需持有审慎态度,后续需要开展更多高质量的临床随机对照试验对研究结果进行进一步论证。

关键词：原发性高血压病清热解毒随机对照试验系统评价 Meta分析

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Divergence angle consideration in energy spread measurement for high-quality relativistic electron beam in laser wakefield acceleration

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Chinese Physics B 2024年第6期33卷 363-368页

作者：卢光伟李曜均胡曦辰陈思宇徐豪祝铭阳闫文超陈黎明 Key Laboratory for Laser Plasmas of Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China

The thorough exploration of the transverse quality represented by divergence angle has been lacking yet in the energy spread measurement of the relativistic electron beam for laser wakefield acceleration(LWFA). In this work, we fill this gap by numerical simulations based on the experimental data, which indicate that in a C-shape magnet, magnetic field possesses the beam focusing effect, considering that the divergence angle will result in an increase in the full width at half maxima(FWHM) of the electron density distribution in a uniformly isotropic manner, while the length-to-width ratio decreases. This indicates that the energy spread obtained from the electron deflection distance is smaller than the actual value, regardless of the divergence angle. A promising and efficient way to accurately correct the value is presented by considering the divergence angle(for instance, for an electron beam with a length-to-width ratio of 1.12, the energy spread correct from 1.2% to 1.5%), providing a reference for developing the high-quality electron beam source.

关键词： relativistic electron beams acceleration by laser–plasma interactions finite element analysis

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乡村教师队伍建设政策执行的风险省思与调适进路

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教育理论与实践 2024年第1期44卷 31-36页

作者：卢光辉周福盛宁夏教育科学研究所宁夏银川750011 宁夏大学教师教育学院宁夏银川750021

随着乡村教师队伍建设政策体系的日益完善,政策架构和治理体系基本确立,以“机会均等”和“差异补偿”为表征的积极差别待遇格局产生了良好的政策效应。作为优化区域资源配置的重要元素,乡村教师队伍建设政策要适时走出“差异补偿”的... 详细信息

随着乡村教师队伍建设政策体系的日益完善,政策架构和治理体系基本确立,以“机会均等”和“差异补偿”为表征的积极差别待遇格局产生了良好的政策效应。作为优化区域资源配置的重要元素,乡村教师队伍建设政策要适时走出“差异补偿”的路径依赖等非意图性后果,锚定“机会均等”的调适进路,加强优化乡村教师队伍建设政策体系中的发展性、支持性政策工具,在加快义务教育优质均衡发展和城乡一体化背景下,培育乡村教师队伍建设政策的新生长点,开辟新时代乡村教师队伍建设政策可持续发展的新场域。

关键词：乡村教师队伍建设乡村教师队伍建设政策机会均等差异补偿乡村教师专业发展均衡发展

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纳米塑料和酮康唑对霍甫水丝蚓肠道的影响

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中国环境科学 2024年第3期44卷 1679-1686页

作者：陆光华喻叶庭薛琪刘建超河海大学环境学院浅水湖泊综合治理与资源开发教育部重点实验室江苏南京210098

采用亚急性毒性试验方法,研究原始及不同官能团修饰的聚苯乙烯纳米塑料(NPs)和环境相关浓度酮康唑(KCZ)共暴露条件下霍甫水丝蚓的生物累积、组织病理学及肠道微生物响应.结果表明,共暴露7d,3种NPs均能被水丝蚓吸收并累积在体内,氨基修饰... 详细信息

采用亚急性毒性试验方法,研究原始及不同官能团修饰的聚苯乙烯纳米塑料(NPs)和环境相关浓度酮康唑(KCZ)共暴露条件下霍甫水丝蚓的生物累积、组织病理学及肠道微生物响应.结果表明,共暴露7d,3种NPs均能被水丝蚓吸收并累积在体内,氨基修饰NPs的累积水平最低(2.78ng/mg),羧基修饰NPs的累积水平最高(22.85ng/mg).共存NPs显著减少了KCZ的生物累积,抑制率在第7d达到最高(88.9%~94.8%).KCZ单独及与NPs共暴露诱导了霍甫水丝蚓的肠道损伤,出现表皮和肠细胞退化、表皮和肠细胞增生、表皮表面不规则和产氯组织变性等病理变化.3种NPs的共存都显著降低了KCZ对胃蛋白酶和纤维素酶活性的抑制;而氨基修饰NPs的共存使D乳酸盐含量显著下降,羧基修饰NPs的共存使二胺氧化酶活性显著下降.KCZ单独暴露显著增加了水丝蚓肠道微生物的多样性,官能团修饰NPs的共存使微生物多样性降低,并改变了门水平的丰度和优势菌属,尤其是氨基修饰NPs共存时优势菌属均为致病菌,增加了水丝蚓感染的风险.

关键词：纳米塑料酮康唑霍甫水丝蚓肠道损伤肠道微生物

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