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Diversity and ecological assembly process of aerobic anoxygenic phototrophic bacteria in a low irradiation area,Three Gorges Reservoir

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Journal of Environmental Sciences 2024年第9期143卷 116-125页

作者： Lixin Huo anran ma Hong Liu Xingzu Wang Cheng Song Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China Chongqing School University of Chinese Academy of SciencesCollege of Resources and EnvironmentChongqing 400714China Key Laboratory of Reservoir Aquatic Environment Chinese Academy of SciencesChongqing 400714China University of Chinese Academy of Sciences Beijing 100049China

Aerobic anoxygenic phototrophic bacteria(AAPB)are significant bacterial groups in aquatic ecosystems,known for their rapid growth and photoheterotrophic characteristics.However,the distribution and ecological assembly process of AAPB in low irradiation freshwater basins remain unclear,warranting further investigation.In this study,we present the diversity,abundance,spatial variations,ecological process,and community interaction of AAPB in sediment of Three Gorges Reservoir(TGR)under low irradiation.Our findings demonstrate the dominant genera of AAPB community that exist in the TGR area also are appeared in different waters,with some regional preference.Moreover,the concentration of pufM gene,an indicator for AAPB,maintains a consistently high numerical level ranging from(2.21±0.44)×10^(4)to(9.98±0.30)×10^(7)gene copies/g.Although solar irradiation is suggested as the major factor affecting AAPB,it remains unclear whether and how AAPB differ between regions due to varying solar irradiation levels.Our results show spatial differences between total bacteria and AAPB communities,with significant differences observed only in AAPB.Geographical and environmental factor contributed less than 10%to the spatial difference of community,with sediment type and environmental factors being the key factors influencing microbial community structure.The stochastic process plays a dominant role in the aggregation and replacement of AAPB communities,among which the most contribution is dispersal limitation.For AAPB network,Yoonia and Gemmobacter are the hubs for modules.Those results valuable insights into the AAPB communities in TGR with low irradiation.

关键词： Three Gorges Reservoir(TGR) Aerobic anoxygenic phototrophic bacteria(AAPB) Bacterial community Null model Community assembly

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Fe-N_(x) sites coupled with core-shell FeS@C nanoparticles to boost the oxygen catalysis for rechargeable Zn-air batteries

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Journal of Energy Chemistry 2024年第3期90卷 565-577,I0013页

作者： Katam Srinivas Zhuo Chen anran Chen Fei ma Ming-qiang Zhu Yuanfu Chen School of Integrated Circuit Science and Engineering and State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 610054SichuanChina College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina School of materials and Energy Yunnan UniversityKunming 650091YunnanChina

The development of efficient single-atom catalysts(SACs) for the oxygen reduction reaction(ORR)remains a formidable challenge,primarily due to the symmetric charge distribution of metal singleatom sites(M-N_(4)).To address such issue,herein,Fe-N_(x) sites coupled synergistic catalysts fabrication strategy is presented to break the uniform electronic distribution,thus enhancing the intrinsic catalytic activity.Precisely,atomically dispersed Fe-N_(x) sites supported on N/S-doped mesoporous carbon(NSC)coupled with FeS@C core-shell nanoparticles(FAS-NSC@950) is synthesized by a facile hydrothermal reaction and subsequent pyrolysis.Due to the presence of an in situ-grown conductive graphitic layer(shell),the FeS nanoparticles(core) effectively adjust the electronic structure of single-atom Fe sites and facilitate the ORR kinetics via short/long-range coupling interactions.Consequently,FAS-NSC@950displays a more positive half-wave potential(E_(1/2)) of 0.871 V with a significantly boosted ORR kinetics(Tafel slope=52.2 mV dec^(-1)),outpacing the commercial Pt/C(E_(1/2)=0.84 V and Tafel slope=54.6 mV dec^(-1)).As a bifunctional electrocatalyst,it displays a smaller bifunctional activity parameter(ΔE) of 0.673 V,surpassing the Pt/C-RuO_(2) combination(ΔE=0.724 V).Besides,the FAS-NSC@950-based zincair battery(ZAB) displays superior power density,specific capacity,and long-term cycling performance to the Pt/C-Ir/C-based ZAB.This work significantly contributes to the field by offering a promising strategy to enhance the catalytic activity of SACs for ORR,with potential implications for energy conversion and storage technologies.

关键词： Fe-N_(x)sites Core-shell FeS@C Synergistic interactions Oxygen reduction reaction Zn-air battery

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A patient with glucocorticoid hypersensitivity syndrome

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Chinese Medical Journal 2022年第21期135卷 2611-2613页

作者： Chenwei Wu anran ma Quanya Sun Xiaolong Zhao Department of Endocrinology and Metabolism Shanghai Public Health Clinical CenterShanghai Medical SchoolFudan UniversityShanghaiChina Department of Endocrinology and Metabolism Huashan HospitalShanghai Medical SchoolFudan UniversityShanghaiChina

To the Editor:Primary generalized glucocorticoid hypersensitivity is a rare condition characterized by generalized,partial target-tissue hypersensitivity to glucocorticoids.Therefore,low concentration of glucocorticoids is sufficient to effectively maintain the patient’s cell physiological effects and to suppress the hypothalamic-pituitary-adrenal axis.Our study aims to provide some insight into when glucocorticoid hypersensitivity should be considered and how to diagnose it.We also propose a diagnostic flow chart for glucocorticoid hypersensitivity for the first time based on our experience and previous literature review.The study was reviewed and approved by the Institutional Review Board of Huashan Hospital,Fudan University(No.KY2020-049).

关键词： glucocorticoid hypersensitivity patient

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Efficient optimization of electron transfer pathway by constructing phosphide/ceria interface boosts seawater hydrogen production

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Journal of Energy Chemistry 2024年第8期95卷 490-498页

作者： Yifan Zhao Lingfeng Yang Youyu Long Min Xi anran Chen Hua Zhang School of materials and Energy Yunnan University Electron Microscopy Centre of Yunnan University Yunnan University

Developing efficient and durable hydrogen evolution reaction（HER） electrocatalysts is one of the most important issues for the commercialization of seawater electrolysis,but it remains challenging.Here,we report a CeO2-CoP nanoneedle array catalyst loaded on Ti mesh（CeO2-CoP/TM） with workfunction-induced directional charge transport properties.The CeO2-CoP/TM catalyst showed superior HER catalytic activity and stability,with over potentials of 41 and 60 mV to attain 10 ma cm-2,in 1 M KOH and 1 M KOH+seawater electrolyte,respectively.Experimental results and theoretical calculations reveal that the work function drives the charge transfer from CeO2to CoP,which effectively balances the electronic density of CoP and CeO2,optimizes the d-band center,and accelerates the water activation kinetics,thus enhancing the HER activity.The solar-driven water electrolysis device displays a high and stable solar-to-hydrogen conversion efficiency of 19.6%.This study offers a work function-induced directional charge transport strategy to design efficient and durable catalysts for hydrogen production.

关键词： Charge transport Heterostructure Seawater splitting Solar-to-hydrogen Work function

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低GI枸杞杂粮代餐粉的配方优化及其降血糖作用研究

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食品与发酵工业 2024年第11期50卷 233-240页

作者：马娇张园园马琴郑安然刘军刘敦华宁夏大学食品科学与工程学院宁夏银川750021

为探究低血糖生成指数(glycemic index,GI)枸杞杂粮代餐粉的最佳配方及降血糖作用,该研究以黄豆、绿豆、黑豆、燕麦、苦荞和藜麦6种杂粮作为主要原料,再辅以药食同源的宁夏枸杞制备一种低GI枸杞杂粮代餐粉。以感官评分为指标,采用单因... 详细信息

为探究低血糖生成指数(glycemic index,GI)枸杞杂粮代餐粉的最佳配方及降血糖作用,该研究以黄豆、绿豆、黑豆、燕麦、苦荞和藜麦6种杂粮作为主要原料,再辅以药食同源的宁夏枸杞制备一种低GI枸杞杂粮代餐粉。以感官评分为指标,采用单因素试验、Plackett-Burman试验、最陡爬坡试验及Box-Behnken试验,优化低GI枸杞杂粮代餐粉配方,并通过建立Ⅱ型糖尿病小鼠模型,评价低GI枸杞杂粮代餐粉的降血糖效果。结果表明,枸杞杂粮代餐粉最佳配方为:黄豆粉添加量15.1%,绿豆粉添加量15.1%,黑豆粉添加量14%,燕麦粉添加量15.6%,苦荞粉添加量12.1%,藜麦粉添加量12.1%,枸杞粉添加量16%(均为质量分数)。低GI枸杞杂粮代餐粉可下调小鼠餐后血糖值并能够改善小鼠基本生长状况,但使小鼠的空腹血糖值缓慢上升且整体趋于平稳状态(P> 0.05)。

关键词：低GI 杂粮枸杞配方优化降血糖

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海上油田伴生气驱油提采与储气库协同建设

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天然气地球科学 2024年第3期35卷 553-562页

作者：孙景耀于姣姣马勇新蒋时馨雷昊王安然中海石油气电集团有限责任公司技术研发中心北京100028 中国海洋石油集团有限公司液化天然气及低碳技术重点实验室北京100028 中海石油(中国)有限公司湛江分公司广东湛江524000

针对海上油田富余伴生气燃烧放空问题,提出了海上油田伴生气回收驱油提采与储气库协同建设技术,对油气“增储上产”和完善天然气“产供储销”体系建设具有重要意义。基于海上油田气驱采油与储气库协同建设各阶段的任务特点,将海上油田... 详细信息

针对海上油田富余伴生气燃烧放空问题,提出了海上油田伴生气回收驱油提采与储气库协同建设技术,对油气“增储上产”和完善天然气“产供储销”体系建设具有重要意义。基于海上油田气驱采油与储气库协同建设各阶段的任务特点,将海上油田伴生气驱油提采与储气库协同建设划分为油田开发建设、伴生气驱油生产、伴生气驱油提采与储气库协同建设和储气库运行4个阶段,形成了海上伴生气回收处理、注入油藏驱油提采存气、储气库协同建设的关键技术体系,并在涠洲12-1油田开展试点项目建设。实施效果及研究结果表明:(1)伴生气驱油相比注水驱油开发提高原油采收率21个百分点,预计20年减少碳排放1500×10^(4)t,增加原油产量243×10^(4)m^(3);(2)利用已有海上生产平台及配套设施建成了中国第一座海上油藏型储气库,目前已形成库容为7×10^(8)m^(3),存储伴生气6×10^(8)m^(3),天然气调峰保供能力为140×10^(4)m^(3)/d;(3)协同型储气库建设成本低,包括注采井改造、新建储气库外输海管及陆地终端等工程投资约为常规海上枯竭气藏改建储气库的一半。结论认为,该研究方案技术体系实现了节能减排、驱油提采、储气调峰等多重功能,是油气上游业务提质增效的重要研究与实践方向。

关键词：近海油气田伴生气节能减排气驱采油储气驱油协同建设协同型储气库

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New class of high-entropy pseudobrookite titanate with excellent thermal stability,low thermal expansion coefficient,and low thermal conductivity

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Journal of Advanced Ceramics 2022年第10期11卷 1654-1670页

作者： Jinyu WU Xiaohui ma Xiaoxia HU Liwen YAN Feng HOU Jiachen LIU anran GUO School of materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China

As a type of titanate,the pseudobrookite(MTi_(2)O_(5)/M_(2)TiO_(5))exhibits a low thermal expansion coefficient and thermal conductivity,as well as excellent dielectric and solar spectrum absorption properties.However,the pseudobrookite is unstable and prone to decomposing below 1200℃,which limits the practical application of the pseudobrookite.In this paper,the high-entropy pseudobrookite ceramic is synthesized for the first time.The pure high-entropy(Mg,Co,Ni,Zn)Ti_(2)O_(5) with the pseudobrookite structure and the biphasic high-entropy ceramic composed of the highentropy pseudobrookite(Cr,Mn,Fe,Al,Ga)_(2)TiO_(5) and the high-entropy spinel(Cr,Mn,Fe,Al,Ga,Ti)_(3)O_(4) are successfully prepared by the in-situ solid-phase reaction method.The comparison between the theoretical crystal structure of the pseudobrookite and the aberration-corrected scanning transmission electron microscopy(AC-STEM)images of high-entropy(Mg,Co,Ni,Zn)Ti_(2)O_(5) shows that the metal ions(M and Ti ions)are disorderly distributed at the A site and the B site in high-entropy(Mg,Co,Ni,Zn)Ti_(2)O_(5),leading to an unprecedentedly high configurational entropy of high-entropy(Mg,Co,Ni,Zn)Ti_(2)O_(5).The bulk high-entropy(Mg,Co,Ni,Zn)Ti_(2)O_(5) ceramics exhibit a low thermal expansion coefficient of 6.35×10^(−6) K^(−1) in the temperature range of 25-1400℃ and thermal conductivity of 1.840 W·m^(−1)·K^(−1) at room temperature,as well as the excellent thermal stability at 200,600,and 1400℃.Owing to these outstanding properties,high-entropy(Mg,Co,Ni,Zn)Ti_(2)O_(5) is expected to be the promising candidate for high-temperature thermal insulation.This work has further extended the family of different crystal structures of high-entropy ceramics reported to date.

关键词： high-entropy pseudobrookite (Mg,Co,Ni,Zn)Ti_(2)O_(5) (Cr,Mn,Fe,Al,Ga)_(2)TiO_(5) high conformational entropy thermal expansion coefficient thermal conductivity

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侧链型聚(靛红-联苯)阴离子交换膜水电解性能

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工程塑料应用 2024年第5期52卷 43-49页

作者：张安然李黎明马颖肖文涛李非凡张玉广中船(邯郸)派瑞氢能科技有限公司河北邯郸056010

对阴离子交换膜(AEM)进行分子结构设计,制备出满足AEM水电解技术需求的高碱稳定性、高电导率的AEM。通过超强酸催化反应制备出具有高碱稳定性的聚(靛红-联苯)(PBPIN)主链;门秀金反应制备出含有高碱稳定性阳离子(哌啶阳离子)以及烷基间... 详细信息

对阴离子交换膜(AEM)进行分子结构设计,制备出满足AEM水电解技术需求的高碱稳定性、高电导率的AEM。通过超强酸催化反应制备出具有高碱稳定性的聚(靛红-联苯)(PBPIN)主链;门秀金反应制备出含有高碱稳定性阳离子(哌啶阳离子)以及烷基间隔基的侧链(6C-Pip);门秀金反应将6C-Pip侧链接枝到PBPIN中制备出PBPIN-6CPip膜。为了验证PBPIN-6C-Pip膜的高碱稳定性以及高电导率,对其在高温KOH溶液中进行了碱稳定性测试,PBPIN-6C-Pip膜在80℃、1 M KOH溶液中浸泡900 h后离子交换容量保留率高达97.02%;对其进行了电导率测试以及透射电子显微镜表征,PBPIN-6C-Pip膜在80℃的纯水中电导率可达88.2 mS/cm,同时具有良好的微相分离结构。对AEM电解槽运行参数(KOH溶液浓度、温度、循环方式)进行了系统地研究后,在最优运行参数下(80℃、2 M KOH,2.0 V),对PBPIN-6C-Pip膜进行了水电解性能测试,电流密度可达1.20 A/cm^(2),在此电流密度下运行700 h后电解槽的电流衰减率仅为0.16 ma/(cm^(2)·h)。通过制备出含有高碱稳定性阳离子与无氧主链的侧链型AEM,验证了无氧主链与侧链结构在AEM碱稳定性与电导率提升方面的潜力,为后续研究提供了实验基础。

关键词：侧链型阴离子交换膜聚(靛红-联苯) 阴离子交换膜 AEM电解槽运行参数水电解制氢技术

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两种投喂模式对中华绒螯蟹生长性能及可食部位风味品质的影响

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饲料工业 2024年第10期45卷 71-77页

作者：邹芳徐洁史家源张鑫马行空王安然葛家春苗淑彦扬州大学动物科学与技术学院江苏扬州225009 江苏省淡水水产研究所江苏南京210000

为研究不同投喂模式对中华绒螯蟹生长性能及可食部位风味品质的影响,设置全程投喂配合饲料(A)和前期投喂配合饲料+后期投喂冰鲜鱼(B)两种投喂模式开展养殖试验。每组设置3个重复,每个重复雄蟹和雌蟹各15只。养殖试验结束后测定生长性能... 详细信息

为研究不同投喂模式对中华绒螯蟹生长性能及可食部位风味品质的影响,设置全程投喂配合饲料(A)和前期投喂配合饲料+后期投喂冰鲜鱼(B)两种投喂模式开展养殖试验。每组设置3个重复,每个重复雄蟹和雌蟹各15只。养殖试验结束后测定生长性能,肌肉、肝胰腺和性腺相关品质指标以及肝胰腺和性腺的挥发性物质含量。结果表明:两种投喂模式对中华绒螯蟹肝胰腺指数、肥满度及附肢肌肉的硬度、内聚性、弹性、剪切力均无显著影响(P>0.05)。B组的雄蟹性腺指数以及雌蟹的增重率、特定生长率显著高于A组(P<0.05)。B组的雌蟹生长性能优于A组(P<0.05),同样地,B组雄蟹肝胰腺和性腺色泽、肌肉胶原蛋白含量也优于A组(P<0.05),且B组的中华绒螯蟹具有更好的风味(P<0.05)。综上所述,前期投喂配合饲料而后期投喂冰鲜鱼的饵料模式对中华绒螯蟹的育肥及风味品质具有更好的效果。因此,后续对于配合饲料的开发建议着重于呈味物质、促胶原蛋白生成和育肥功能饲料的开发方面。

关键词：中华绒螯蟹投喂模式配合饲料冰鲜鱼育肥风味品质

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Clavukoelloids A—M,Thirteen Rare N-Containing Nardosinane Type Sesquiterpenoids from the Soft Coral Clavularia koellikeri

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Chinese Journal of Chemistry 2023年第12期41卷 1491-1496页

作者： Xiao Han Zhe Wang anran Fu Kun Liu Zongchen ma Xuli Tang Dahai Zhang Guoqiang Li Key Laboratory of marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China Qingdao Shandong 266003 China College of Chemistry and Chemical Engineering Ocean University of China Qingdao Shandong 266100 China Laboratory of marine Drugs and Biological Products National Laboratory for Marine Science and Technology Qingdao Shandong 266235 China

Thirteen new nitrogen-containing nardosinane-type sesquiterpenoids,clavukoelloids A-M(1-13)with unique acrylamide fragments vs.the reported general nardosinane-type sesquiterpenoids containing lactone,were isolated from the soft coral Clavularia koellikeri collected from the South China Sea.The structures and absolute configurations of new compounds were unambiguously determined by analysis of spectroscopic data,CP3,DP4+,ECD spectra,and X-ray diffraction.Compound 6 showed anti-inflammatory activities and hepatoprotective activities in transgenic fluorescent zebrafish.

关键词： Soft coral Clavularia koellikeri Nardosinane-type sesquiterpenoids Absolute configurations Activities Natural products NMR spectroscopy Terpenoids

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