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Highly ordered crystallization of α-FAPbl_(3) films via homogeneous seeds for efficient perovskite solar cells

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Journal of Energy Chemistry 2024年第7期94卷 625-634页

作者： guohui luo Linfeng Zhang Liyun guo Xiuhong Geng Penghui Ren Yi Zhang Haihua Hu Xiaoping Wu Lingbo Xu Ping Lin Haiyan He Xuegong Yu Peng Wang Can Cui Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology Zhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina Hangzhou City University Hangzhou 310015ZhejiangChina Key Laboratory of Solar Energy Utilization and Energy Saving Technology of Zhejiang Province Zhejiang Baima Lake Laboratory Co.Ltd.Hangzhou 310012ZhejiangChina State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027ZhejiangChina

Formamidine lead triiodide(FAPbI_(3))perovskites have become the most promising photovoltaic materials for perovskite solar cells with record power conversion efficiency(PCE).However,random nucleation,phase transition,and lattice defects are still the key challenges limiting the quality of FAPbI_(3) *** studies show that the introduction or adding of seeds in the precursor is effective to promote the nucleation and crystallization of perovskite ***,the seed-assisted approach focuses on heterogeneous seeds or hetero-composites,which inevitably induce a lattice-mismatch,the genera-tion of strain or defects,and the phase segregation in the perovskite ***,we first demonstrate that high-quality perovskite films are controllably prepared using α-and δ-phases mixed FAPbI_(3) micro-crystal as the homogeneous seeds with the one-step antisolvent *** partially dissolved seeds with suitable sizes improve the crystallinity of the perovskite flm with preferable orientation,improved carrier lifetime,and increased carrier *** importantly,the α-phase-containing seeds promote the formation of α-phase FAPbI_(3) films,leading to the reduction of residual lattice strain and the suppres-sion of I-ion ***,the adding of dimethyl 2,6-pyridine dicarboxylate(DPD)into the pre-cursor further suppresses the generation of defects,contributing to the PCE of devices prepared in air ambient being significantly improved to 23.75%,among the highest PCEs for fully air-processed FAPbI_(3) solar *** unpackaged target devices possess a high stability,maintaining 80%of the initial PCE under simulated solar illumination exceeding 800 h.

关键词： Perovskite solar cells FAPbI_(3) Homogeneous seeds Strain Phase stability

Cell replacement with stem cell-derived retinal ganglion cells from different protocols

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Neural Regeneration Research 2024年第4期19卷 807-810页

作者： Ziming luo Kun-Che Chang Spencer Center for Vision Research Byers Eye InstituteStanford University School of Medicine Department of Ophthalmology Louis J.Fox Center for Vision RestorationUniversity of Pittsburgh School of Medicine Department of Neurobiology Center of NeuroscienceUniversity of Pittsburgh School of Medicine

Glaucoma,characterized by a degenerative loss of retinal ganglion cells,is the second leading cause of blindness *** is currently no cure for vision loss in glaucoma because retinal ganglion cells do not regenerate and are not replaced after *** stem cell-derived retinal ganglion cell transplant is a potential therapeutic strategy for retinal ganglion cell degenerative *** this review,we first discuss a 2D protocol for retinal ganglion cell differentiation from human stem cell culture,including a rapid protocol that can generate retinal ganglion cells in less than two weeks and focus on their transplantation ***,we discuss using 3D retinal organoids for retinal ganglion cell transplantation,comparing cell suspensions and *** review provides insight into current knowledge on human stem cell-derived retinal ganglion cell differentiation and transplantation,with an impact on the field of regenerative medicine and especially retinal ganglion cell degenerative diseases such as glaucoma and other optic neuropathies.

关键词： cell clumps cell suspension cell transplantation differentiation direct-induced protocol glaucoma optic neuropathy regenerative medicine retinal ganglion cell retinal organoids stem cells

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清代云南保甲制度与流动人口控制研究

中国边疆史地研究 2024年第1期34卷 154-165,216,F0003页

作者：罗勇大理大学民族文化研究院云南省文史研究馆云南省大理市671003

清前期保甲制度主要在云南腹地府州县和新改流地区推行,清中期推广至滇西南与缅甸接壤的州县地区,再扩大至有垦荒移民的山区。云南推行保甲制度各阶段的特征与清代云南不同时期的社会问题密切相关。清末将清查出来的无业游民纳入移居地... 详细信息

清前期保甲制度主要在云南腹地府州县和新改流地区推行,清中期推广至滇西南与缅甸接壤的州县地区,再扩大至有垦荒移民的山区。云南推行保甲制度各阶段的特征与清代云南不同时期的社会问题密切相关。清末将清查出来的无业游民纳入移居地的保甲体系,以至于无业游民成为清晚期云南社会问题之一,推进保甲过程对流动人口的不同政策影响了流动人口的身份。

关键词：清代云南保甲制度流动人口

明清时期世袭家族谱牒与家族变迁——以云南蒙化左氏谱牒为例

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思想战线 2024年第4期50卷 73-81页

作者：罗勇大理大学民族文化研究院云南大理671003

在明代军户世袭制度和明清土官世袭制度下形成的世袭家族的谱牒有三种形式,一是记录历任世袭官员功绩履历的亲供状,二是在职官员子侄宗图,三是包括所有或某一支系世系的族谱。云南蒙化左氏是明清时期的世袭土官家族,明正德时期的《蒙化... 详细信息

在明代军户世袭制度和明清土官世袭制度下形成的世袭家族的谱牒有三种形式,一是记录历任世袭官员功绩履历的亲供状,二是在职官员子侄宗图,三是包括所有或某一支系世系的族谱。云南蒙化左氏是明清时期的世袭土官家族,明正德时期的《蒙化左氏家谱》以及清代的《蒙化左土官记事》均属于亲供状,记载了历任土官的功绩,均为应袭土官请袭所用,其目的在于确定应袭土官的顺序,维系应袭嫡长子的身份地位;清乾隆时期的《蒙化左族家谱》则由庶子倡修,是包括所有支系的族谱,是响应“笃宗族以昭壅睦”的结果。左氏有家庙、私祠和专祠,也支持修建佛寺。家庙是明嘉靖以前在职土官供奉四代祖先的场所,私祠是嘉靖以后左氏供奉始祖和历代祖先的场所,专祠是崇祯时期供奉庶子左重、左廷皋父子的官祠。左氏在明成化时修建寺庙,供奉亡人香火,随着私祠的出现,家庙渐废,私祠与佛寺合为一体。到清乾隆时私祠亦荒废,专祠变成家族祠堂。这些现象反映了在明清制度变化的背景下,嫡长子享受世官世禄、为祖先带来朝廷恩典的特权受到挑战,庶子亦可以通过科举进入仕途,为祖先带来封赠,进而提高社会地位。蒙化左氏谱牒所反映的家族变化,也出现在卫所军官家族的谱牒中,反映了在明清制度变化背景下世袭家族嫡长子与庶子身份地位的变化。

关键词：世袭家族族谱云南明清时期

Immunomodulatory potential of exopolysaccharides from Lactiplantibacillus plantarum YY-112

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Food Science and Human Wellness 2024年

作者： Mengfan luo Wanyi Zhou Wenyang Tao Jianrong Xing Jingrui Li Yuxing guo Ying Yang Institute of Food Science， Zhejiang Academy of Agricultural Sciences School of Food Science and Pharmaceutical Engineering， Nanjing Normal University

In vitro simulated colonic fermentation studies have shown the prebiotic potential of exopolysaccharides from Lactiplantibacillus plantarum YY-112 (YEPS). Its immunomodulatory effects and related mechanisms were systematically investigated in this study. We observed that YEPS intervene in immune responses and improve intestinal microbial structure in normal mice， including significantly increasing the relative abundance of Enterorhabdus and norank＿f＿＿norank＿o＿＿Clostridia UCG-014 as well as decreasing that of unclassified＿c＿＿Bacilli (P < 0.05). In the immunocompromised mouse model， YEPS decreased IL-6 levels (P < 0.05) and protected the spleen by regulating lymphocyte levels. YEPS preserved the intestinal barrier by improving Mucin 2， Zonula occludens protein 1， and Occludin expression. Moreover， YEPS significantly reduced the relative abundance of Bacillus， unclassified＿c＿＿Bacilli， Lachnoclostridium， Eubacterium＿xylanophilum＿group， and Desulfovibrio (P < 0.05)， potentially enhancing mice immunity by improving the intestinal microbiota associated with immune function. In conclusion， YEPS can be used as a natural functional extract with prebiotic effects that may improve host immunity. This provided the basis for the application of YEPS as a novel potential food additive.

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GIS-based prediction method of shallow landslides induced by heavy rainfall in large mountainous areas

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Journal of Mountain Science 2024年第5期21卷 1534-1548页

作者： luo Xiaoxiong LI Congjiang ZHOU Jiawen State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China College of Water Resource and Hydropower Sichuan UniversityChengdu 610065China

Rainwater runoff that does not infiltrate the soil during heavy rainfall may increase slope instability. The effect of runoff is usually neglected in conventional rainfall-induced slope failure analysis to simplify the model. To analyze the effect of runoff on slope stability, this study simultaneously simulated the effects of surface runoff and rainfall infiltration on bank slopes in the Three Gorges Reservoir Area. A shallow slope failure method that can be used to analyze runoff was proposed based on the modified Green-Ampt model, the simplified Saint-Venant model, and the infinite slope model. In this model, the modified Green–Ampt model was used to estimate the rainfall infiltration capacity and the wetting front depth. The eight-flow(D8) method and the simplified Saint-Venant model were selected to estimate the distribution of runoff. By considering the wetting front depth as the slip surface depth, the factor of safety of the slope could be determined using the infinite slope stability model. A comparison of the different models reveals that runoff can escalate the instability of certain slopes, causing stable slopes to become unstable. Comparison of the unstable areas obtained from the simulation with the actual landslide sites shows that the model proposed in this study can successfully predict landslides at these sites. The slope instability assessment model proposed in this study offers an alternative approach for estimating high-risk areas in large mountainous regions.

关键词： Rainfall-induced landslide Surface runoff Infiltration Geographic Information System Landslide susceptibility

HetNets Under Decoupled Uplink and Downlink Access with UE Random Discontinuous Transmission: Local Delay and Energy Efficiency

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China Communications 2024年第3期21卷 205-216页

作者： Zhang Yue Zheng Fuchun luo Jingjing School of Electronic and Information Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

Due to the limited uplink capability in heterogeneousnetworks (HetNets), the decoupled uplinkand downlink access (DUDA) mode has recently beenproposed to improve the uplink performance. In thispaper, the random discontinuous transmission (DTX)at user equipment (UE) is adopted to reduce the interferencecorrelation across different time slots. By utilizingstochastic geometry, we analytically derive themean local delay and energy efficiency (EE) of an uplinkHetNet with UE random DTX scheme under theDUDA mode. These expressions are further approximatedas closed forms under reasonable *** results reveal that under the DUDA mode, there isan optimal EE with respect to mute probability underthe finite local delay constraint. In addition, with thesame finite mean local delay as under the coupled uplinkand downlink access (CUDA) mode, the HetNetsunder the DUDA mode can achieve a higher EE witha lower mute probability.

关键词： decoupled uplink and downlink access(DUDA) heterogeneous networks(HetNets) random discontinuous transmission(DTX) stochastic geometry

Recent advances in transition-metal catalyzed nitrene transfer reactions with carbamates

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Chinese Chemical Letters 2024年第3期35卷 76-86页

作者： Yanshu luo Xinyu Zhang Yuanzhi Xia College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China

Nitrene transfer reactions are powerful tools in synthetic organic *** recent years,transitionmetal catalyzed nitrene transfer reactions with carbamates as the nitrene precursors have been widely *** species undergoes facile C-H amination,aziridination,and bifunctionalization of alkenes under the catalysis of different transition metals including Rh,Fe,Ru and others,enabling the efficient construction of various nitrogen-containing *** this review,the recent developments in nitrene transfer reactions with carbamates via N-O bond cleavage were introduced based on different types of reaction,and the key mechanistic information and synthetic applications of the methodologies were discussed.

关键词： Transition-metal catalysis Nitrene transfer Carbamate C—H amination Aziridination Bifunctionalization

Fiber Optic SPR POCT: A Novel Nucleic Acid Detection Biosensor for Environmental Viruses

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Research 2024年第3期2024卷 791-793页

作者： Jing Wang Zhaojun Duan Dixian luo Department of Laboratory Medicine Shenzhen Hospital of Integrated Traditional and Western MedicineShenzhenChina National Institute for Viral Disease Control and Prevention China Center for Disease Control and PreventionBeijingChina.

In the post-COVID-19 pandemic era, the long-term surveillance of pathogens is still important. The rapid detection of pathogens facilitates the accurate and convenient real-time monitoring of microbial contamination and improves the management of diseases. Here, a novel surface plasmon resonance (SPR)-based point of care testing (POCT) approach of microorganism nucleic acids with the guidance of CRISPR enzyme is described, including the application of optical fiber-based detection of trace SARS-CoV2 virus in sewage water on SPR and validation of the plasmonic biosensor for the detection of single-nucleotide mutations in natural water samples.

关键词： POCT SPR convenient