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Light-, Middle- and Heavy-Lanthanide Ate-Complexes Bearing Ln(Ⅲ)-Si bonds: Structural, Spectroscopic, and Bonding Analysis

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Chinese Journal of Chemistry 2023年第22期41卷 2995-3002,I0002页

作者： xiaowei pan Changjiang Wu Huayi Fang Chunhua Yan School of Materials Science and Engineering Tianjin Key Lab for Rare Earth Materials and ApplicationsNankai University Tianjin300350China Shanghai Zhitong Construction Engineering Technology Co. Ltd.Shanghai 204433China College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhouGansu 730000China

Recent decades have witnessed a rapid development of the lanthanide silicon *** this research,by reacting[(THF)_(3)LisiPh_(3)]with Cp_(3)Ln(Ⅰ)(THF)(Ln(I)=Sm(Ⅰ),Tb(Ⅱ),Dy(Ⅰ),Yb(Ⅰ)or Cp_(2)Lu(Ⅱ)CI(THF),a series of middle-and heavy-lanthanocene monosilyl/disilyl ate-complexes([(DME)_(3)Lil[Cp_(3)Ln(Ⅱ)SiPh_(3)]and[(DME)_(3)Li[Cp_(2)Lu(Ⅱ)(SiPh_(3))_(2)])were *** structures of the obtained lanthanocene monosilyl/disilyl ate-complexes were determined by single crystal X-ray *** with the previously reported[(DME)_(3)Li[Cp_(3)La(Ⅱ)SiPh_(3)]and[(DME);Lil[Cp_(3)Ce(Ⅱ)SiPha],a complex group comprising silyl light-,middle-and heavy-lanthanocene with identical core coordination pattern are presented.

关键词： Lanthanide ate-complex Silyl ligand Lanthanide-silicon bond Structure elucidation Density functional calculations Metallocenes

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基于超声改性橡胶籽壳活性炭的制备方法研究

热带作物学报 2024年第6期45卷 1235-1243页

作者：潘晓威赵祉芳占国艳梁耀辉潘政陈淑贤叶剑芝中国热带农业科学院农产品加工研究所广东湛江524001 云南农业大学热带作物学院云南普洱665000

以农业废弃物橡胶籽壳为原料,以KOH为活化剂,与超声处理相结合制备活性炭,通过调整制备处理条件对活性炭的表面结构进行调控,以获得最佳制备条件。采用傅里叶显微红外、扫描电镜、元素分析、热重分析等手段,研究活性炭的物理化学特性,... 详细信息

以农业废弃物橡胶籽壳为原料,以KOH为活化剂,与超声处理相结合制备活性炭,通过调整制备处理条件对活性炭的表面结构进行调控,以获得最佳制备条件。采用傅里叶显微红外、扫描电镜、元素分析、热重分析等手段,研究活性炭的物理化学特性,考察其吸附能力,并比较超声预处理与未超声预处理的活性炭的特性。研究得出最优制备条件为:剂料比为1∶1,超声作用时间为60 min,活化时间为60 min,活化温度为700℃。超声预处理后的活性炭(UAC)的亚甲基蓝吸附值为400 mg/g、碘吸附值为1340.2 mg/g、得率达25.9%,总孔容为0.9511 cm^(3)/g,比表面积为1034.5009 m^(2)/g;未经超声预处理的活性炭(NAC)的亚甲基蓝吸附值为300 mg/g,碘吸附值为894.0 mg/g,得率为20.8%,比表面积为690.2461 m^(2)/g,总孔容为0.6830 cm^(3)/g。二者均含羟基、醇羟基、羰基官能团,橡胶籽壳活性炭的氮气吸附等温线为Ⅰ型。KOH活化后的活性炭表面存有大量孔结构,UAC活性炭表面光滑平整,有许多丰富规则的孔结构,优于NAC活性炭。橡胶籽壳的碳(C)含量丰富,经过KOH活化后,UAC和NAC的C含量由原来的56.81%,分别提高到75.97%、64.89%。KOH活化后的样品比橡胶籽壳更加稳定,UAC和NAC样品的总重量分别损失62%和68%之后趋于稳定。综上所述,超声处理制备的活性炭性能更佳,说明超声波的空化效应作用在活性炭结构表面,使其结构发生变化,进而提高其吸附性能、比表面积等。

关键词：橡胶籽壳活性炭碘吸附值亚甲基蓝吸附值

国家食用豆产业技术体系2019-2021年普通豇豆新品种(系)联合鉴定分析

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作物杂志 2024年第3期 76-81页

作者：胡晴园公丹潘晓威王素华王丽侠中国农业科学院作物科学研究所北京100081

新品种的联合鉴定可以有效评估其高产、稳产及生态适应性。本研究对国家食用豆产业技术体系2019-2021年10个普通豇豆新品种(系)在14个试验点的联合鉴定试验进行了分析。结果表明,不同生态区普通豇豆的表型差异明显,其中以主茎分枝数、... 详细信息

新品种的联合鉴定可以有效评估其高产、稳产及生态适应性。本研究对国家食用豆产业技术体系2019-2021年10个普通豇豆新品种(系)在14个试验点的联合鉴定试验进行了分析。结果表明,不同生态区普通豇豆的表型差异明显,其中以主茎分枝数、单株荚数和产量的变异较明显(平均变异系数均大于20%),株高、生育天数和百粒重的变异一般(平均变异系数均介于10%~20%),单荚粒数变异不明显(平均变异系数为9.93%)。最终分别筛选出4个适合北方春播区、4个适合北方夏播区及2个适合南方区种植的豇豆新品种(系)。

关键词：普通豇豆新品种(系) 表型变异产量分析

Structural insights into photosynthetic cyclic electron transport

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Molecular Plant 2023年第1期16卷 187-205页

作者： Shumeng Zhang Baohua Zou Peng Cao Xiaodong Su Fen Xie xiaowei pan Mei Li National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Faculty of Environment and Life Beijing University of TechnologyBeijingChina College of Life Science Capital Normal UniversityBeijingChina

During photosynthesis,light energy is utilized to drive sophisticated biochemical chains of electron transfers,converting solar energy into chemical energy that feeds most life on *** electron transfer/flow(CET/CEF)plays an essential role in efficient photosynthesis,as it balances the ATP/NADPH ratio required in various regulatory and metabolic *** I,cytochrome b6f,and NADH dehydrogenase(NDH)are large multisubunit protein complexes embedded in the thylakoid membrane of the chloroplast and key players in NDH-dependent CEF ***,small mobile electron carriers serve as shuttles for electrons between these membrane protein *** electron transfer requires transient interactions between these electron donors and *** biology has been a powerful tool to advance our knowledge of this important biological process.A number of structures of the membrane-embedded complexes,soluble electron carrier proteins,and transient complexes composed of both have now been *** structural data reveal detailed interacting patterns of these electron donor-acceptor pairs,thus allowing us to visualize the different parts of the electron transfer *** review summarizes the current state of structural knowledge of three membrane complexes and their interaction patterns with mobile electron carrier proteins.

关键词： photosynthesis cyclic electron transfer/flow structure protein complex electron carrier interaction

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乳腺癌女性决策后悔的研究进展

全科护理 2024年第13期22卷 2434-2438页

作者：何黄莹桂红民吴冰冰潘晓巍湖州师范学院医学院护理学院 313000 浙江省湖州市第一人民医院 313000

从决策后悔的概述、乳腺癌女性决策后悔的影响因素、相关测量工具及干预方法几个方面综述乳腺癌女性决策后悔的研究进展,为国内研究和实践提供指导,减轻乳腺癌女性的决策后悔,提高其生活质量和心理健康。

关键词：乳腺癌决策后悔影响因素综述

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绿豆创新种质的芽用特性分析

植物遗传资源学报 2024年第1期25卷 141-146页

作者：王思航公丹刘海涛潘晓威王素华李志刚王丽侠中国农业科学院作物科学研究所北京100081 内蒙古民族大学农学院通辽028000 北京方圆平安生物科技股份有限公司北京101100

绿豆芽富含维生素、膳食纤维等营养物质,培育绿豆芽专用新品种可有效提高芽菜品质及生产效益。前期基于绿豆核心种质资源的芽用特性评价,创制出早熟矮生、高产广适的新种质35份,本研究对这35份绿豆新种质进行了芽长、芽粗、芽豆比等性... 详细信息

绿豆芽富含维生素、膳食纤维等营养物质,培育绿豆芽专用新品种可有效提高芽菜品质及生产效益。前期基于绿豆核心种质资源的芽用特性评价,创制出早熟矮生、高产广适的新种质35份,本研究对这35份绿豆新种质进行了芽长、芽粗、芽豆比等性状初步评估。结果表明,不同种质的芽长变异范围最大,为5.56~7.42 cm,变异系数为13.36%;芽粗变异范围为2.41~3.24 mm,变异系数为13.00%;芽豆比变异范围为8.12~10.36,变异系数为3.60%。相关分析显示芽豆比与芽粗(R=0.817)呈极显著正相关,与百粒重(R=-0.583)、芽长(R=-0.137)则呈一定的负相关。芽重与芽长、芽粗、百粒重的回归方程也表明,芽粗对芽重的贡献远大于芽长和百粒重,是芽用品种筛选的首选性状。基于芽用性状分析,分别筛选出适宜细长型豆芽的新种质21XJ54-1、21BJ育95、21XJ54-2及适宜粗壮型豆芽的新种质21BJ育96、21XJ56-1、21DT46、中绿27等。对不同产地中绿27的发芽试验表明,生态环境也影响芽长和芽粗。其中河北丰宁生产的中绿27芽豆比最高(10.27),其次是河南新乡(9.94);新疆昌吉中绿27的豆芽最长(6.23 cm),而河北丰宁的豆芽最粗(3.70 mm)。本研究结果为绿豆芽专用种质的筛选与培育提供了亲本材料,为绿豆芽产业的安全健康发展奠定了基础。

关键词：绿豆新种质芽用特性

不同品种橡胶籽中氨基酸及无机元素定性与定量分析

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现代农业科技 2024年第14期 132-137页

作者：马会芳刘元靖潘晓威刘丽丽叶剑芝潘政中国热带农业科学院农产品加工研究所广东湛江524001 农业农村部农产品加工质量安全风险评估实验室(湛江) 广东湛江524001

橡胶籽作为橡胶树的副产物在很长一段时间里仅少量被用来育种,大部分均未被开发利用。本文利用ICP-MS等设备对不同品种橡胶籽中的氨基酸和无机元素进行定性和定量分析,比较不同品种橡胶籽中氨基酸和无机元素种类与含量的差异,从而为下... 详细信息

橡胶籽作为橡胶树的副产物在很长一段时间里仅少量被用来育种,大部分均未被开发利用。本文利用ICP-MS等设备对不同品种橡胶籽中的氨基酸和无机元素进行定性和定量分析,比较不同品种橡胶籽中氨基酸和无机元素种类与含量的差异,从而为下一步的研究及橡胶籽产品的开发提供理论依据。测定分析结果表明,橡胶籽中含有赖氨酸、组氨酸、缬氨酸、苏氨酸、亮氨酸、苯丙氨酸等饲料必需氨基酸,适合作动物性饲料的原料;不同品种橡胶籽中均含有较丰富的无机元素,其与品种等因素具有一定的相关性。因此,橡胶籽可用于植物蛋白粉和优质蛋白饲料的生产。

关键词：橡胶籽氨基酸无机元素定性分析定量分析开发利用

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Occurrence and vertical distribution of aluminum and rare earths in weathered crust elution-deposited rare earth ore:Effect of soil solution pH and clay minerals

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Journal of Rare Earths 2024年第7期42卷 1394-1402,I0007页

作者： Jiaxin pan Longsheng Zhao Zheng Li xiaowei Huang Zongyu Feng Jun Chen National Engineering Research Center for Rare Earth China GRINM Group Co.Ltd.Beijing100088China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China GRIREM Hi–Tech Co. Ltd.Langfang065201China GRIREM Advanced Materials Co. Ltd.Beijing100088China GRIMAT Engineering Institute Co. Ltd.Beijing101407China

Weathered crust elution-deposited rare earth ore is crucial source of medium and heavy rare earths,with in-situ leaching being the most common mining *** high contents of impurity of aluminum in the leach solution are a significant challenge for the subsequent enrichment process of rare earths.A comprehensive understanding of the occurrences and vertical distribution of aluminum and rare earths within typical vertical profiles can provide valuable insights into entire design of the in-situ *** paper improves a five-step sequential extraction method to analyze the occurrence and vertical distribution of rare earths and aluminum in vertical profiles from Chongzuo and *** results demonstrate that soil solution pH is the main factor affecting the vertical distribution of ionexchangeable rare *** samples have distinct areas of enrichment for ion-exchangeable rare earths or ***-exchangeable rare earths are primary concentrated in the middle and lower parts of the ore layer(4-13 m in Chongzuo,14-22 m in Longyan),while the ion-exchangeable aluminum is mainly enriched in the upper part of the ore layer(1-5 m in Chongzuo,and 2-14 m in Longyan).The vertical distribution of inorganic hydroxy aluminum is likely influenced by the micromorphology and particle size of the clay *** inorganic hydroxy aluminum concentration in Chongzuo samples decreases continuously from 415.65 to 120.95 mg/kg with increasing sampling depth,whereas the concentration in Longyan samples(110.55-171.27 mg/kg)is almost independence with sampling *** results provide direct guidance for the entire design of the injection well depth and the leaching parameters,thereby inhibiting the leaching of impurity of aluminum and lower the consumption of leaching agent.

关键词： Weathered crust elution-deposited rare earth ore Sequential extraction Occurrence Aluminum Rare earth elements

Supramolecular assembly of chloroplast NADH dehydrogenase-like complex with photosystem Ⅰfrom Arabidopsis thaliana

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Molecular Plant 2022年第3期15卷 454-467页

作者： Xiaodong Su Duanfang Cao xiaowei pan Lifang Shi Zhenfeng Liu Luca Dall’Osto Roberto Bassi Xinzheng Zhang Mei Li National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China College of Life Science Capital Normal UniversityBeijing 100101P.R.China Dipartimento di Biotecnologie Universitàdi Verona37134 VeronaItaly Center for Biological Imaging CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101P.R.China

Cyclic electron transport/flow(CET/CEF)in chloroplasts is a regulatory process essential for the optimization of plant photosynthetic efficiency.A crucial CEF pathway is catalyzed by a membrane-embedded NADH dehydrogenase-like(NDH)complex that contains at least 29 protein subunits and associates with photosystem I(PSI)to form the NDH-PSI ***,we report the 3.9Åresolution structure of the Arabidopsis thaliana NDH-PSI(AtNDH-PSI)*** constructed structural models for 26 AtNDH subunits,among which 11 are unique to chloroplasts and stabilize the core part of the NDH *** the supercomplex,one NDH can bind up to two PSI-light-harvesting complex I(PSI-LHCI)complexes at both sides of its membrane *** minor LHCIs,Lhca5 and Lhca6,each present in one PSI-LHCI,interact with NDH and contribute to supercomplex formation and ***,our study reveals the structural details of the AtNDH-PSI supercomplex assembly and provides a molecular basis for further investigation of the regulatory mechanism of CEF in plants.

关键词： cyclic electron transport/flow NADH dehydrogenase-like(NDH)complex photosystem I structure Arabidopsis thaliana