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Durable All Inorganic Perovskite Tandem Photovoltaics

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Durable All Inorganic Perovskite Tandem Photovoltaics

Biosynthetic pathway of prescription cucurbitacin IIa and high-level production of key triterpenoid intermediates in engineered yeast and tobacco

第十一届新型太阳能材料科学与技术学术研讨会

作者： Chenghao duan Kaicheng Zhang Christoph J.Brabec feng Gao Keyou Yan School of Environment and Energy South China University of Technology

Inorganic perovskite tandem solar cells（IPTSCs） are promising candidates to break the efficiency bottleneck and address the stability issue.[1,2] However,challenges remain in fabricating 2-terminal（2T） IPTSCs due to the inferior film formation and deep trap states induced by tin cations.[3] Herein,a green ligand evolution（GLE） strategy with p-toluenesulfonyl hydrazide is employed to regulate film formation and eliminate deep traps in inorganic narrow bandgap perovskite,enabling the successful development of 2T ***,the 1.31 eV CsPbSnI:GLE device delivers a record efficiency of 17.41%.Combined with the 1.92 eV CsPbIBr top-cell,2T-IPTSCs exhibit a champion efficiency of 22.57%（certified 21.92%）.Additionally,IPTSCs are engineered to deliver remarkable operation durability under maximum power point tracking,maintaining 80% of the initial efficiency at 65 ℃ for 1510 h and 85℃ for 800 h,respectively.

关键词： Inorganic perovskite Tandem solar cell Narrow bandgap Green Ligand Evolution Durability

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Plant Communications 2024年第6期5卷 154-172页

作者： Geng Chen Zhaokuan Guo Yanyu Shu Yan Zhao Lei Qiu Shaofeng duan Yuan Lin Simei He Xiaobo Li Xiaolin feng Guisheng Xiang Bo Nian Yina Wang Zhiyuan Li Chongkang Yang Yang Shi Yingchun Lu Guanze Liu Shengchao Yang Guanghui Zhang Bing Hao State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan The Key Laboratory of Medicinal Plant Biology of Yunnan ProvinceNational&Local Joint Engineering Research Center on Germplasms Innovation&Utilization of Chinese Medicinal Materials in Southwest ChinaYunnan Agricultural UniversityKunming 650201China Yunnan Characteristic Plant Extraction Laboratory KunmingYunnan 650106China

Cucurbitacin IIa is a triterpenoid isolated exclusively from Hemsleya plants and a non-steroidal anti-inflammatory drug that functions as the main ingredient of prescription Hemslecin capsules and tablets in *** biology provides new strategies for production of such valuable cucurbitacins at a large scale;however,the biosynthetic pathway of cucurbitacin IIa has been unknown,and the heterologous production of cucurbitacins in galactose medium has been expensive and low *** this study,we characterized the functions of genes encoding two squalene epoxidases(HcSE1-2),six oxidosqualene cyclases(HcOSC1-6),two CYP450s(HcCYP87D20 and HcCYP81Q59),and an acyltransferase(HcAT1)in cucurbitacin IIa biosynthesis by heterologous expression in Saccharomyces cerevisiae and Nicotiana *** achieved high-level production of the key cucurbitacin precursor 11-carbonyl-20b-hydroxy-Cuol from glucose in yeast via modular engineering of the mevalonate pathway and optimization of P450 expression *** resulting yields of 46.41 mg/l 11-carbonyl-20b-hydroxy-Cuol and 126.47 mg/l total cucurbitacin triterpenoids in shake flasks are the highest yields yet reported from engineered ***,production of 11-carbonyl-20b-hydroxy-Cuol by transient gene expression in tobacco resulted in yields of 1.28 mg/g dry weight in *** work reveals the key genes involved in biosynthesis of prescription cucurbitacin IIa and demonstrates that engineered yeast cultivated with glucose can produce high yields of key triterpenoid *** describe a low-cost and highly efficient platform for rapid screening of candidate genes and high-yield production of pharmacological triterpenoids.

关键词： cucurbitacin IIa oxidosqualene cyclase OSC 11-carbonyl-20b-hydroxy-Cuol Saccharomyces cerevisiae Nicotiana benthamiana Hemsleya chinensis

Petrogenesis of Early Cretaceous Pandian high-Mg diorites from the eastern North China Craton within an intracontinental setting:Implications for the skarn Fe mineralization

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Journal of Earth Science 2024年

作者： Si-Yuan Li Chao Fu Qi-Wei feng Xiao-Bo Zhao Zhi-Cai Dang Kang-Kang Xu Ming-Bo Gao Ji-Lei Gao Zhuang duan Ming Ma Tianjin Center China Geological Survey (North China Center for Geoscience Innovation) Shandong Engineering Research Center of High-Grade Iron Deposits Exploration and Exploitation China University of Geosciences (Beijing) No.1 Institute of Geology and Mineral Resources of Shandong Province Geological Exploration Institute of Shandong Zhengyuan China Metallurgical Geology Bureau Shandong Provincial Bureau of Geology & Mineral Resources Institute of Geophysical and Geochemical Exploration Chinese Academy of Geological Sciences

High-magnesium andesitic rocks （HMAs） were initially interpreted to have formed via interaction of slab melt with mantle in arc ***,high-magnesium diorites （HMDs,analogs of HMAs）have been recognized can be formed in intracontinental *** of the HMDs producedsignificant Fe skarn *** genesis of HMDs and how they earn high Fe mineralization fertilities remain *** Pandian HMDs,located in Luxi Block,eastern North China Craton（NCC）,formed in continental interior and show a close spatiotemporal and genetic relationship to Fe skarn *** contribution carried out a comprehensive geochemical study on the Pandian HMDs to constrain the genesis of HMDs and further shed light on the key factors leading to their high Feskarn mineralization *** rocks show high Mg#values （55–80）,andesitic compositions （SiO2:55.3–66.2 wt%）,and arc-like *** Pandian HMDs possess (87Sr/86Sr)iof0.70720–0.70737,εNd（t） values of-11.8–-12.6,(206Pb/204Pb)iof 17.3706–17.4575,(207Pb/204Pb)iof15.3945–15.4440,and (208Pb/204Pb)iof 36.6606–*** notably distinct geochemicalcharacteristics between the Pandian HMDs and ancient lower crust in the NCC make it unlikely that the Pandian HMDs were sourced from the ***,The chemical characteristics of Pandian HMDs are akin to the proximal and contemporaneous mantle-derived Ji’nan *** presentresults,combined with geological analysis,reveal that Pandian HMDs were most likely primarily derived from an ancient sub-continental lithospheric mantle （SCLM） experienced metasomatism related to the subducted Paleo-Pacific slab-released *** higher La/Sm and Hf/Sm ratios and more enriched radiogenic Sr-Pb isotopes of Pandian HMDs relative to Ji’nan gabbro indicate crustalmaterial involvement during magma *** of crustal material assimilation,based on Sr-Nd isotopes,suggests parental melts of the Pandian HMDs assimilated about 20%Archean TTG gneisses and 60%Ordovicia

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Pain and immune function in patients undergoing gastric cancer surgery following stellate ganglion block with total intravenous anesthesia

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World Journal of Gastrointestinal Surgery 2024年第9期16卷 2961-2967页

作者： Zhen Wu Hong-Qin Cai chun-feng Wang Xiang-Yuan Yu Jie-Qiong Wang Department of Anesthesiology The Kunshan Second People’s HospitalKunshan 215300Jiangsu ProvinceChina

BACKGROUND Stellate ganglion block is a commonly used sympathetic nerve block technique that restores the balance of the sympathetic and vagal nervous systems of the body and inhibits sympathetic nerve *** To analyze the effect of a stellate ganglion block combined with total diploma intravenous anesthesia on postoperative pain and immune function in patients undergoing laparoscopic radical gastric cancer(GC)surgery to provide a refe-rence basis for the formulation of anesthesia protocols for radical GC *** This study included 112 patients who underwent laparoscopic radical surgery for GC between January 2022 and March *** was no restriction on *** patient grouping method used was a digital random table method,and the num-ber of cases in each group was *** control group was administered total intravenous anesthesia,and the observation group compounded the stellate gan-glion block according to the total intravenous anesthesia *** hemodynamics,pain levels,and immune indices were compared between the *** The heart rate and mean arterial pressure in the observation group after in-tubation were lower than those in the control group(P0.05).The number of CD3+,CD4+,and CD4+/CD8+cells at the end of surgery was higher in the observation group than in the control group,and the number of CD8+cells was lower in the observation group than in the control group(P0.05).CONCLUSION The application of a stellate ganglion block combined with total intravenous anesthesia had no significant effect on postoperative pain levels in patients undergoing laparoscopic radical GC ***,it can safely reduce the effect of surgery on the immune function

关键词： Stellate ganglion block Total intravenous anesthesia Laparoscopy Radical gastric cancer surgery Immune

CEFR蒸汽发生器给水调节系统的设计与调试

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核动力工程 2024年第2期45卷 183-186页

作者：刘勇段天英冯伟伟张玮瑛中国原子能科学研究院北京102413

蒸汽发生器给水调节系统是中国实验快堆(CEFR)重要的控制系统,需要实现自动控制。根据该系统的控制需求针对性地设计了一套给水调节控制方案,并在CEFR实堆功率运行工况下验证了该控制方案。堆上试验结果表明,该控制方案能够在各种设计... 详细信息

蒸汽发生器给水调节系统是中国实验快堆(CEFR)重要的控制系统,需要实现自动控制。根据该系统的控制需求针对性地设计了一套给水调节控制方案,并在CEFR实堆功率运行工况下验证了该控制方案。堆上试验结果表明,该控制方案能够在各种设计工况下维持蒸汽发生器出口钠温稳定,具备抑制反应堆其他参数干扰的能力。本研究通过CEFR蒸汽发生器给水调节系统的设计与调试工作,实现了CEFR蒸汽发生器给水调节系统的自动化控制。

关键词： CEFR 蒸汽发生器给水调节系统自动控制

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三维动态应力强度因子的自适应虚拟节点法

固体力学学报 2024年第4期45卷 466-476页

作者：冯泽洋段庆林大连理工大学工业装备结构分析优化与CAE软件全国重点实验室大连116024 大连理工大学白俄罗斯国立大学联合学院大连116024

采用自适应虚拟节点法计算三维动态应力强度因子,改善了标准虚拟节点法计算精度和效率的不足.通过无需裂尖加强函数(和相应的额外自由度)的虚拟节点技术模拟裂纹处的强间断.在裂纹处引入自适应网格加密技术以及契合裂纹问题的加密准则,... 详细信息

采用自适应虚拟节点法计算三维动态应力强度因子,改善了标准虚拟节点法计算精度和效率的不足.通过无需裂尖加强函数(和相应的额外自由度)的虚拟节点技术模拟裂纹处的强间断.在裂纹处引入自适应网格加密技术以及契合裂纹问题的加密准则,无需高计算消耗的全局稠密网格,从而提高计算精度和效率.采用简便的约束近似技术处理局部加密网格中的悬空节点,避免特殊单元和复杂形函数,便于数值实现.数值算例表明,相较于标准虚拟节点法,自适应虚拟节点法可有效提高计算精度,且在同样精度下具有更少的计算消耗和更高的效率.

关键词：动力学裂纹应力强度因子自适应网格加密虚拟节点法扩展有限元

3D打印全再生粗骨料混凝土各向异性力学性能研究

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同济大学学报（自然科学版） 2024年第3期52卷 370-377页

作者：段珍华吕振源肖建庄李垒刘春同济大学土木工程学院上海200092 广东省公路建设有限公司广东广州510623 广深新塘立交改造项目管理处广东广州510765

选用粒径4.75~10mm的粗骨料,制备成天然粗骨料混凝土和再生粗骨料混凝土,对比分析了作为3D打印油墨的可打印性,并探讨了不同养护条件对3D打印混凝土硬化后各向异性力学性能的影响。试验结果表明,相较于天然粗骨料,全再生粗骨料有助于加... 详细信息

选用粒径4.75~10mm的粗骨料,制备成天然粗骨料混凝土和再生粗骨料混凝土,对比分析了作为3D打印油墨的可打印性,并探讨了不同养护条件对3D打印混凝土硬化后各向异性力学性能的影响。试验结果表明,相较于天然粗骨料,全再生粗骨料有助于加速打印油墨由流动性向塑性转化;通过配合比调整,打印油墨在静置10min后仍能维持可打印性,连续打印下的可工作时间增至20min;相较于标准养护,自然养护7d的天然及再生打印试样X方向的抗压强度降低分别为19.84%及20.13%;抗压强度关系为X轴(打印方向)>Z轴(叠层方向)>Y轴(传动轴方向),标准养护28d天然及再生打印试样Y轴抗压强度分别为X轴的83.41%与84.27%,表现出明显的各向异性。最后,从细微观角度阐释了骨料类型及3D打印层间性能对各向异性的形成机理。

关键词： 3D打印混凝土全再生粗骨料可打印性各向异性养护条件

渭南市区服务行业从业人员HBV感染情况分析

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职业与健康 2008年第17期24卷 1806-1807页

作者：王青侠任晓平段春峰陕西省渭南市卫生局卫生监督所 714000

目的了解渭南市服务行业从业人员乙肝病毒(HBV)感染情况,为公共卫生管理与乙型肝炎防治工作提供科学依据。方法对渭南市区2007年饮食行业及公共场所从业人员乙肝表面抗原(HBsAg)检测结果进行分析。结果2007年渭南市区服务行业从业人员... 详细信息

目的了解渭南市服务行业从业人员乙肝病毒(HBV)感染情况,为公共卫生管理与乙型肝炎防治工作提供科学依据。方法对渭南市区2007年饮食行业及公共场所从业人员乙肝表面抗原(HBsAg)检测结果进行分析。结果2007年渭南市区服务行业从业人员中检出HBsAg阳性者102人,阳性率为2.2%。其中男性阳性率为3.0%,女性阳性率为1.6%。食品行业阳性率为3.1%,公共场所0.3%。高中以上人员阳性率为1.0%,高中以下人员阳性率为2.3%。结论2007年渭南市区服务行业从业人员HBV感染率男性高于女性,食品行业感染率高于公共场所,文化程度低的感染率高。

关键词：服务行业从业人员 HBsAg

基于全基因组的植物适应性进化研究取得新进展——藻苔属对青藏高原极端环境的适应

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中国科学：生命科学 2024年第8期54卷 1491-1492页

作者：段磊陈红锋中国科学院华南植物园植物资源保护与可持续利用重点实验室广州510650 华南国家植物园广州510650

适应性进化(adaptive evolution)指某物种在自然选择过程中,通过在基因和性状层面的进化以达到对有机和无机环境的适应,它是生物在变化多样的环境中存续和繁衍的最重要策略之一.自达尔文的《物种起源》发表至今,适应性进化的原理一直是... 详细信息

适应性进化(adaptive evolution)指某物种在自然选择过程中,通过在基因和性状层面的进化以达到对有机和无机环境的适应,它是生物在变化多样的环境中存续和繁衍的最重要策略之一.自达尔文的《物种起源》发表至今,适应性进化的原理一直是进化生物学的一个核心问题,对其进行分子层面的深入研究是了解其内在机制的必要条件,也是洞悉生物多样性形成的必由之路. 20世纪末,分子系统发育方法已被用于适应性进化研究,但长期受困于基因序列信息的不足,随着近年来三代测序技术的发展和普及,采用全基因组数据全面、深入地探讨物种适应性的分子机制便成为可能^([1]).

关键词：《物种起源》适应性进化进化生物学极端环境自然选择过程无机环境生物多样性分子层面