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Characterization,expression dynamics,and potential function of OPA1 for regulation of mitochondrial morphology during spermiogenesis in Phascolosoma esculenta

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Journal of Oceanology and Limnology 2024年第1期42卷 187-200页

作者： Xinming GAO binbin feng Chen DU Congcong HOU Shan JIN Daojun TANG Junquan ZHU Key Laboratory of Applied Marine Biotechnology by the Ministry of Education and Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China College of Ecology Lishui UniversityLishui 323000China

Mitochondria undergo morphological changes during spermatogenesis in some *** mechanism and role of mitochondrial morphology regulation,however,remain somewhat *** this study,we analyzed the molecular characteristics,expression dynamics and subcellular localization of optic atrophy protein 1(OPA1),a mitochondrial fusion and cristae maintenance-related protein,to reveal the possible regulatory mechanisms underlying mitochondrial morphology in Phascolosoma esculenta *** full-length cDNA of the *** opa1 gene(Pe-opa1)is 3743 bp in length and encodes 975 amino *** Pe-OPA1 protein is highly conservative and includes a transmembrane domain,a GTPase domain,two helical bundle domains,and a lipid-interacting *** and protein expression was higher in the coelomic fluid(a site of spermatid development)of male *** and increased first and then decreased from March to ***,their expression during the breeding stage was significantly higher than during the non-breeding stage,suggesting that Pe-OPA1 is involved in *** *** Pe-OPA1 protein was more abundant in components consisting of many spermatids than in components without,indicating that Pe-OPA1 mainly plays a role in the spermatid in coelomic ***,Pe-OPA1 was mainly detected in the spermatid *** experiments showed that the Pe-OPA1 are constitutively expressed and co-localized with mitochondria during spermiogenesis,suggesting its involvement in *** *** results provide evidence for Pe-OPA1's involvement in the regulation of mitochondrial morphology during spermiogenesis.

关键词： optic atrophy protein 1(OPA1) spermiogenesis Phascolosoma esculenta mitochondrial dynamics spermatid

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碳载体在质子交换膜燃料电池中的应用及优化

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化工学报 2024年第4期75卷 1469-1484页

作者：冯彬彬卢明佳黄志宏常译文崔志明华南理工大学化学与化工学院广东广州510641

随着能源危机和环境污染不断加剧,人们对高能量转换效率且低污染装置的需求日益迫切。质子交换膜燃料电池(PEMFC)作为一种高效能、零污染的绿色能源转换装置,被认为是替代传统能源的有望选择之一。目前,要使汽车燃料电池系统具有市场竞... 详细信息

随着能源危机和环境污染不断加剧,人们对高能量转换效率且低污染装置的需求日益迫切。质子交换膜燃料电池(PEMFC)作为一种高效能、零污染的绿色能源转换装置,被认为是替代传统能源的有望选择之一。目前,要使汽车燃料电池系统具有市场竞争力仍面临成本和耐久性的挑战。当前降低成本的主流方式为降低催化剂上的铂负载,然而,较低的铂负载通常也意味着较小的催化剂表面积,更大的传质阻力,从而导致性能损失。此外,耐久性问题也是制约燃料电池汽车发展的一大阻力,尤其是碳腐蚀问题。本综述从优化碳载体的角度出发,结合目前研究现状,深入探讨了传质和碳腐蚀两方面的不同优化策略,并对未来碳载体的发展方向进行展望,可为新型碳载体的构建提供参考。

关键词：燃料电池载体传质碳腐蚀耐久性

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PdZn intermetallic compound stabilized on ZnO/nitrogendecorated carbon hollow spheres for catalytic semihydrogenation of alkynols

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Nano Research 2022年第4期15卷 3090-3098页

作者： Chunlin Ye Xujian Chen Shasha Li binbin feng Yanghe Fu Fumin Zhang De-Li Chen Weidong Zhu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical ChemistryZhejiang Normal UniversityJinhua 321004China

Enhancing the selectivity of noble metal catalysts through electronic modulation is important for academic research and chemical industrial ***,we report a facile sacrificial template strategy for the synthesis of PdZn intermetallic compound(3-4 nm)highly distributed in ZnO/nitrogen-decorated carbon hollow spheres(PdZn-ZnO/NCHS)to optimize the selectivity of Pd catalysts,which involves carbonization of a core-shell structured polystyrene(PS)@ZIF-8 precursor in an inert atmosphere,impregnation Pd precursor,and subsequent H2 reduction *** to the unique structural and compositional features,the developed PdZn-ZnO/NCHS delivers an excellent catalytic performance for the semihydrogenation of 2-methyl-3-butyn-2-ol(MBY)to 2-methyl-3-buten-2-ol(MBE)with high activity(>99%),high selectivity(96%),and good recyclability,outperforming the analog Pd on ZnO(Pd/ZnO)as well as the supported Pd nanoparticles(Pd/C and Pd/NC).Density functional theory(DFT)calculations reveal that the presence of Znδ+species in PdZn-ZnO/NCHS alters the adsorption modes of reactant and product,leading to a decrease of the adsorption strength and an enhancement of the energy barrier for overhydrogenation,which results in a kinetic favor for the selective transformation of MBY to *** addition,PdZn-ZnO/NCHS was also very effective for the partial hydrogenation of dehydrolinalool to hydrolinalool.

关键词： PdZn intermetallic compound semihydrogenation of alkynol MOF-derived N-decorated carbon hollow sphere density functional theory(DFT)

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Construction of isolated Ni sites on nitrogen-doped hollow carbon spheres with Ni-N_(3) configuration for enhanced reduction of nitroarenes

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Nano Research 2022年第7期15卷 6001-6009页

作者： binbin feng Rou Guo Qiulan Cai Yaping Song Nan Li Yanghe Fu De-Li Chen Jiangwei Zhang Weidong Zhu Fumin Zhang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical ChemistryZhejiang Normal UniversityJinhua 321004China Dalian National Laboratory for Clean Energy&State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Designing and synthesizing high-efficiency non-precious metal-based catalysts having uniform active sites increases the reactivity and selectivity of materials and provides a platform for an in-depth understanding of their catalytic reaction *** this study,we provided an approach for fabricating isolated nickel single-atom sites(Ni SAs)with high loading(4.9 wt.%)stabilized on nitrogen-doped hollow carbon spheres(NHCS)using a core–shell structured Zn/Ni bimetallic zeolitic imidazolate framework(ZIF)composite as the sacrificial *** as-fabricated Ni SAs/NHCS catalyst shows superior activity,selectivity,and recycling durability for the catalytic transfer hydrogenation of nitrobenzene to aniline,thus achieving 100%yield of aniline with a turn-over frequency(TOF)value as high as 29.9 h^(−1) under mild *** TOF value is considerably superior to the supported Ni nanoparticle *** experiments designed show that the hollow structure feature of NHCS facilitates accessible active sites and mass transfer,which thus contributes to the enhancement of the catalytic performance of Ni SAs/*** functional theory calculations show the high chemo-selectivity and activity of the Ni SAs catalyst,arising from the unique role of the single Ni-N3 site on simultaneously activating the H donor(N_(2)H_(4))and substrate,as well as the hydrogenation of the–NOH group as the rate-determining step.

关键词： single-atom catalyst chemo-selective reduction nitro compounds aromatic amines

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Transient flameout process of boron-magnesium agglomerates during combustion in oxygen-rich atmospheres

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Particuology 2024年第5期88卷 290-301页

作者： Lian Duan Zhixun Xia Yunchao feng binbin Chen Likun Ma Jianxin Hu College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China School of Mechanical Engineering and Mechanics Xiangtan UniversityXiangtan 411105China

In this study,boron–magnesium agglomerates with varying mass ratios were prepared by drying a micron-sized boron–magnesium mixed suspension,and the combustion process of these agglomerates under different oxygen-rich concentrations were investigated using a laser ignition *** test results showed that when the mass fraction of magnesium powder in boron-magnesium agglomerates exceeded a certain threshold(between 2%and 5%),flame extinction and reignition occurred after a significant reduction in the agglomerate volume during *** process is referred to as the transient flameout process,which is affected by the magnesium content of the agglomerate and the oxygen concentration in the ambient *** increase in the magnesium content or oxygen concentration makes this phenomenon more *** weakening of the flame intensity,a dark film gradually covered the particle surfaces.X-ray diffraction and elemental analyses of the cross-section and outer surface of the condensed combustion product suggested that the dark film is primarily composed of Mg-B-O ternary *** film prevents direct contact between boron and oxygen,thereby inhibiting surface and gas-phase reactions and leading to the occurrence of the transient flameout phenomenon.

关键词： Agglomerated particle Boron–magnesium fuel Boron combustion Transient flameout process Solid fuel ramjet

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鹿茸菇的研究概述

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食用菌 2024年第2期46卷 1-6页

作者：孔佳欣卫彩红丰彬彬任昂胡建伟孔新刘慧美塔里木大学生命科学与技术学院新疆阿拉尔843300 南京农业大学生命科学学院江苏南京210000 新疆农垦科学院生物技术研究所新疆石河子832000

鹿茸菇(Lyophyllum decastes)作为一种珍稀的食药兼用菌,营养丰富且高蛋白低脂肪,具有抗肿瘤、降三高、调节免疫力、保肝护肝等功效,其功能活性物质的主要成分为多糖类、甾醇类及核苷等。对鹿茸菇的驯化栽培、营养价值和活性成分及作用... 详细信息

鹿茸菇(Lyophyllum decastes)作为一种珍稀的食药兼用菌,营养丰富且高蛋白低脂肪,具有抗肿瘤、降三高、调节免疫力、保肝护肝等功效,其功能活性物质的主要成分为多糖类、甾醇类及核苷等。对鹿茸菇的驯化栽培、营养价值和活性成分及作用等方面进行详细介绍,为该菌的推广及相关研究提供参考。

关键词：鹿茸菇药用价值基因组营养价值人工育种抗氧化抗肿瘤降三高

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Combination of methylthio-chemistry with living crystallization-driven self-assembly toward uniformπ-conjugated nanostructures with antibacterial activity,surface tailorability,tunable morphology and dimension

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Science China Chemistry 2024年第7期67卷 2341-2352页

作者： Chuyu Duan binbin Xu Ruru Li Xiaoyu Huang Shaoliang Lin Chun feng Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Living crystallization-driven self-assembly(CDSA)provides robust access to uniformπ-conjugated nanostructures(CNSs)from block copolymers(BCPs)containing a crystallineπ-conjugated segment with controlled dimension,morphology and composition,which show appealing applications in biomedicine,photocatalysis and *** further expand the application spectrum of these CNSs,the development of facile strategies toward diverse CNSs with varying structures/functionalities is highly ***,BCPs consisting of oligo(p-phenylene ethynylene)-b-poly(polypropyl-3-methanethiol acrylate)(OPE_(9)-bPMTPA35and OPE_(9)-b-PMTPA_(58);the subscript represents the number of repeat unit of each block)consisting of a crystallineπ-conjugated core-forming OPE_(9)segment and a corona-forming PMTPA block are *** efficient“click-type”alkylation of methylthio groups,OPE_(9)-b-PMTPA with varying contents of sulfonium unit is *** ribbon-like micelles with different widths and lengths can then be generated in a controlled manner via the self-seeding approach of living ***,negatively charged polymeric and Ag nanoparticles can be immobilized on sulfonium/methylthio-containing shells by taking advantage of electrostatic attraction and coordination interaction,***,the ribbon-like micelles with positively charged shells exhibit antibacterial activity against *** the ease of modification of PMTPA-based shell and attractive opto-electronic/photocatalytic properties ofπ-conjugated units,the combination of methylthio-chemistry and living CDSA opens a new avenue to generate multi-functional CNSs for widespread applications from biomedicine to photocatalysis.

关键词： crystallization-driven self-assembly block copolymer π-conjugated nanostructure methylthio-chemistry

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清远抽水蓄能电站溃坝洪水演进及影响分析

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广东水利水电 2024年第5期 56-62,84页

作者：金苗张宜冯彬彬林波周佳麒傅举鹏蔡瀛南方电网调峰调频公司运行分公司广州510635 广东省水利电力勘测设计研究院有限公司广州510635

为研究清远抽水蓄能电站溃坝对下游梯级水库和防洪保护区的影响,利用MIKEFLOOD构建一二维耦合模型对溃坝洪水演进进行模拟。研究共设置12种工况,分析不同因素对溃坝后洪水流量、淹没范围、淹没水深等演进过程的影响。结果显示,溃决形式... 详细信息

为研究清远抽水蓄能电站溃坝对下游梯级水库和防洪保护区的影响,利用MIKEFLOOD构建一二维耦合模型对溃坝洪水演进进行模拟。研究共设置12种工况,分析不同因素对溃坝后洪水流量、淹没范围、淹没水深等演进过程的影响。结果显示,溃决形式(溃口宽度)及溃决水位、溃决历时都是影响溃坝洪水的重要因素,且梯级电站溃坝后对于距离较近且地势较低的楼心村、大楼村影响最为显著,应采取相应预防措施。

关键词：溃坝洪水演进过程分析 MIKE模型梯级水库

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Ce-modified AlZr pillared clays supported-transition metals for catalytic combustion of chlorobenzene

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Journal of Rare Earths 2018年第11期36卷 1169-1174页

作者： binbin feng Yingxi Wei Yingnan Qiu Shufeng Zuo Na Ye Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process Shaoxing University

In this article, we provided a one-step hydrothermal method to prepare composite AIZr pillaring agents, and synthesized AlZr-pillared clays （AIZr-PILC） via ion exchange. Compared with conventional methods, our method successfully shortened synthetic routes and greatly reduced consumption of the materials. Then, A1Zr-PILC-supported manganese and cerium oxide catalysts were obtained by impregnation method. The compositions and properties of these catalysts were characterized by some technical means. The energy dispersive X-ray spectroscopy clearly shows the existence of Mn, Ce, and O, which indicates the successful loading of the active components on the surface of AIZr-PILC. Meanwhile, the results of X- ray diffraction （XRD） and N2 adsorption experiments demonstrate that the synthesized A1Zr-PILC out- performs the raw clays （Na-mmt） and mononuclear AI-PILC in the catalytic combustion of chloroben- zene. XRD and high-resolution transmission electron microscopy also proves that the high activity of them is related to the high dispersion of the oxides and the exposure of more active sites. H2-temper- ature-programmed reduction shows that cerium can promote the redox cycles of the manganese system through the strong interactions between MnO2, CeO2 and AIZr-PILC. In particular, MnCe（9：1 ）/AIZr-PILC shows the best catalytic activity in the catalytic combustion of chlorobenzene.

关键词： Montmorillonite AIZr-PILC Mn Ce based catalysts Catalytic combustion Chlorobenzene Rare earths

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基于多元教学模式下的中药化学实用技术实践教学研究

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广东化工 2024年第7期51卷 175-177,189页

作者：杨策易东阳冯彬彬李宁张建海蒋坤霞彭小园祖文宇王文祥重庆三峡医药高等专科学校药学院重庆404120

目的:观察高职高专中药化学实用技术在多元模式(BOPPPS-PBL-CBL-TBL)下的实践教学成效。方法:随机分为实验班及对照班,实验组采用BOPPPS-PBL-CBL-TBL多元教学模式,对照组采用LBL传统教学模式。以知识,能力及素质为基点,对研究对象实施... 详细信息

目的:观察高职高专中药化学实用技术在多元模式(BOPPPS-PBL-CBL-TBL)下的实践教学成效。方法:随机分为实验班及对照班,实验组采用BOPPPS-PBL-CBL-TBL多元教学模式,对照组采用LBL传统教学模式。以知识,能力及素质为基点,对研究对象实施成效评价,展开调查问卷进行课程满意度评价,课堂表现收集过程性评价,期末考试成绩定为终结性评价,通过SPSS 22.0软件分析比较两组学生的综合评判结果,旨在评价改革实施效果。结果:实验组学生在调查问卷中反馈高度认可多元模式下的中药化学实用技术教学过程。而传统教学班级学生认可度极少。且终结性评价中实验班比对照班的期末成绩普遍偏高,且具有显著性(P<0.05)。结论:中药化学实用技术以多元模式(BOPPPS-PBL-CBL-TBL)进行教学,可显著提升教学效果,提升学生自研能力,分析及解决问题能力及团队协作能力。

关键词：中药化学实用技术多元教学模式实践教学

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