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跨界小RNA调控昆虫与寄主植物及病原微生物互作的研究进展

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昆虫学报 2024年第7期67卷 1019-1028页

作者：李贞陈皓玮方海波刘小侠张松斗中国农业大学植物保护学院昆虫学系北京100193

小RNA(small RNA,sRNA)是一类序列短于300 bp的非编码RNA,它在生物体的细胞生长、分裂、分化、增殖和凋亡过程中发挥着重要的调控作用。近年来的多项研究表明,sRNA还可以作为信号分子在物种之间传递,以跨界方式发挥调控作用。除了视觉... 详细信息

小RNA(small RNA,sRNA)是一类序列短于300 bp的非编码RNA,它在生物体的细胞生长、分裂、分化、增殖和凋亡过程中发挥着重要的调控作用。近年来的多项研究表明,sRNA还可以作为信号分子在物种之间传递,以跨界方式发挥调控作用。除了视觉和化学信息,生物个体之间还可以利用多种分子信号传递和实现信息交流,其中,sRNA分子不仅可以在生物个体内移动和调控基因表达,还可以作为1种分子信号跨越物种发挥动物、植物和微生物互作关系的信息纽带作用。作为地球上物种数量最多、生态位最丰富的类群,昆虫体内存在多种外源sRNA分子。本文分析了sRNA介导跨界调控的分子基础,综述了近年来关于外源sRNA通过生物互作进入昆虫体内,跨界调控昆虫基因表达,影响昆虫与寄主植物及病原微生物之间互作关系的研究进展,并分析了sRNA介导的跨界RNAi对昆虫生态适应性的影响以及在害虫防控中的应用前景。昆虫和植物之间sRNA分子的跨界转移可以调控植物抗虫性和社会性昆虫的品级分化,微生物的sRNA进入昆虫体内可以辅助病原微生物的侵染或影响寄生蜂的发育。利用基因工程改造或人工表达外源sRNA进行跨界调控是研发害虫高效生防产品的新途径。

关键词：昆虫分子信号小RNA 跨界调控生物互作害虫防控

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成人重度抑郁症脑白质微结构的DTI的研究

中国CT和MRI杂志 2024年第3期22卷 42-45页

作者：窦松涛臧晨侯效芳宜宾市兴文县中医院放射科四川宜宾644400 驻马店市第二人民医院医学影像科河南驻马店463000

目的本研究希望在重度抑郁症患者中发现与额叶和海马体相关的脑白质微结构异常。方法利用弥散张量成像数据和基于通道的空间统计,研究了30名重度抑郁症成年人与31名健康对照者脑白质纤维束的微观结构差异,并计算了与MDD相关的微观结构... 详细信息

目的本研究希望在重度抑郁症患者中发现与额叶和海马体相关的脑白质微结构异常。方法利用弥散张量成像数据和基于通道的空间统计,研究了30名重度抑郁症成年人与31名健康对照者脑白质纤维束的微观结构差异,并计算了与MDD相关的微观结构变化和病程之间的关系。结果研究发现,重度抑郁症患者的胼胝体膝部和体部、右侧放射冠和部分丘脑辐射的分数各向异性降低,提示这些区域的纤维髓鞘化水平降低,这些区域各向异性分数的降低与较长的病程有关。结论本次研究结果表明,MDD可能与关键纤维束的显微结构损伤有关,这为理解和治疗MDD提供了新的思路。

关键词：重度抑郁症脑白质微结构弥散张量成像各向异性分数

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Vacancy healing for stable perovskite solar cells via bifunctional potassium tartrate

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Journal of Energy Chemistry 2024年第1期88卷 64-70,I0002页

作者： Jing dou Yue Ma Xiuxiu Niu Wentao Zhou Xueyuan Wei Jie dou Zhenhua Cui Qizhen song Tinglu song Huanping Zhou Cheng Zhu Yang Bai Qi Chen Experimental Centre for Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationBIC-ESATSchool of Materials Science and EngineeringPeking UniversityBeijing 100871China

Perovskite solar cell has gained widespread attention as a promising technology for renewable ***, their commercial viability has been hampered by their long-term stability and potential Pb leakage. Herein, we demonstrate a bifunctional passivator of the potassium tartrate(PT) to address both challenges. PT minimizes the Pb leakage in perovskites and also heals cationic vacancy defects, resulting in improved device performance and stability. Benefiting from PT modification, the power conversion efficiency(PCE) is improved to 23.26% and the Pb leakage in unencapsulated films is significantly reduced to 9.79 ppm. Furthermore, the corresponding device exhibits no significant decay in PCE after tracking at the maximum power point(MPP) for 2000 h under illumination(LED source, 100 mW cm^(-2)).

关键词： Perovskite Potassium tartrate Lead leakage Long-term stability

Geology and C-O isotope geochemistry of carbonate-hosted Pb-Zn deposits, NW Guizhou Province, SW China

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Chinese Journal Of Geochemistry 2013年第1期32卷 7-18页

作者： dou song ZHOU Jiaxi Yunnan Nonferrous Metals Geological Bureau School of Geoscience and Info-Physics Central South University State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences

The Pb-Zn metallogenic district in NW Guizhou Province is an important part of the Yun-nan-Sichuan-Guizhou Pb-Zn metallogenic province, and also is one of the most important Pb-Zn producers in China. The hosting rocks of the Pb-Zn deposits are Devonian to Permian carbonate rocks, and the basement rocks are meta-sedimentary and igneous rocks of the Proterozoic Kunyang and Huili groups. The ore minerals are composed of sphalerite, galena and pyrite, and the gangue minerals are include calcite and dolomite. Geology and C-O isotope of these deposits were studied in this paper. The results show that δ13C and δ18O values of hydrothermal calcite, altered wall rocks-dolostone, sedimentary calcite and hosting carbonate rocks range from -5.3‰ to -0.6 ‰ (mean -3.4‰) and +11.3‰ to +20.9 ‰ (mean +17.2‰), -3.0‰ to +0.9 ‰ (mean -1.3‰) and +17.0‰ to +20.8‰ (mean +19.7‰), +0.6‰ to +2.5 ‰ (mean +1.4‰) and +23.4‰ to +26.5 ‰ (mean +24.6‰), and -1.8‰ to +3.9‰ (mean +0.7‰) and +21.0‰ to +26.8‰ (mean +22.9‰), respectively, implying that CO2 in the ore-forming fluids was mainly a result of dissolution of Devonian and Carboniferous carbonate rocks. However, it is difficult to evaluate the contribution of sediment de-hydroxylation. Based on the integrated analysis of geology, C and O isotopes, it is believed that the ore-forming fluids of these carbonate-hosted Pb-Zn deposits in this area were derived from multiple sources, including hosting carbonate rocks, Devonian to Permian sedimentary rocks and basement rocks (the Kun-yang and Huili groups). Therefore, the fluids mixing is the main precipitation mechanism of the Pb-Zn deposit in this province.

关键词：铅锌矿床碳酸盐岩碳氧同位素综合地质中国西南同位素地球化学贵州省托管

Effects of biodegradation on diamondoid distribution in crude oils from the Bongor Basin,Chad

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Energy Geoscience 2024年第2期5卷 120-128页

作者： Huanxin song Menghan Chen Lirong dou Dingsheng Cheng Zhigang Wen Cooperative Innovation Center of Unconventional Oil and Gas Yangtze UniversityWuhanHubei430100China College of Resources and Environment Yangtze UniversityWuhanHubei430100China PetroChina Research Institute of Petroleum Exploration&Development Beijing100083China

The sensitivity of biodegradation on diamondoids was investigated using a series of biodegraded oil samples from the Ronier tectonic unit of Bongor Basin,*** results suggest that diamondoids,including adamantanes(As)and diamantanes(Ds),are relatively resistant to biodegradation and obvious biodegradation was observed in oils with a Peters-Moldowan(PM)biodegradation rank of 6 or ***,the sensibility of biodegradation on diamondoids is generally similar to hopanes and regular *** biodegradation evolves,the changes in concentration and components of diamondoids show that the biodegradation process is selective and *** significant increase of MD/MA and DMD/DMA for oils with a PM ranking 6t indicates that diamantanes are generally more resistant to biodegradation than *** similar trends of DMA/MA,EA/MA,MD/D,DMD/MD and other relevant indexes,show that higher alkylation homologs are more resistant to *** commonly used diamondoid ratios,such as MAI,EAI,MDI and DMID-1,are obviously affected by biodegradation at the stage of high-level biodegradation,which may indicate that these ratios should be used with caution in case of severely degraded oils.

关键词： Diamondoids Biodegradation Sensitivity Crude oil Bongor Basin Chad

Strontium isotopic geochemistry of Tianqiao Pb-Zn deposit, Southwest China

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Chinese Journal Of Geochemistry 2014年第2期33卷 131-137页

作者： dou song LIU Jishun ZHOU Jiaxi School of Geosciences and Info-physics Central South University Yunnan Nonferrous Metals Geological Bureau State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences

Tianqiao carbonate-hosted Pb-Zn deposit, controlled by NW-trending F37 thrust fault and NW-trending Tianqiao anticline, is located in the eastern part of Sichuan-Yunnan-Guizhou(SYG) Pb-Zn metallogenic province, southwestern Yangtze Block, southwest China. Ore bodies in this deposit are hosted in the Devonian-Carboniferous carbonate rocks, and ore minerals include sphalerite, galena and pyrite, while the gangue minerals are dominated by calcite and dolomite. Using high–precision solid thermal ionization mass spectrometry(TIMS), this paper reports the strontium isotopic compositions(0.7119 to 0.7167) of sulfide samples from the Tianqiao deposit in order to trace the origin of hydrothermal fluids. Compared with the country rocks, the calculated 87Sr/86Sr200 Ma values of sulfide range from 0.7118 to 0.7130, higher than those of the age-corrected Devonian to Permian sedimentary rocks(0.7073 to 0.7101) and the Middle Permian Emeishan flood basalts(0.7078 to 0.7039), but lower than those of the age-corrected Proterozoic basement rocks(such as the Kunyang and Huili Groups, 87Sr/86Sr200 Ma=0.7243 to 0.7288). This implies a mixed strontium source between the older basement rocks and the younger cover sequences. Together with geologic and previous isotopic evidences, we considered that the fluids' mixing is a possible mechanism for sulfide precipitation in the Tianqiao deposit.

关键词：同位素地球化学中国西南地区铅锌矿床天桥锶峨眉山玄武岩基底岩石碳酸盐岩

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美国海军海洋环境信息化保障系统发展研究

舰船科学技术 2024年第3期46卷 184-189页

作者：张思维韩冬梅窦松然左世磊王德明刘鑫李志超黄婉君中国船舶集团有限公司第七一四研究所北京100101

美国全球海军战略对其海洋环境信息保障能力提出较高要求,经过多年发展,美国在海洋环境信息化保障系统方面已形成多层级完善的环境信息保障体系,我国海军正在不断走向远洋,海洋环境信息化保障系统同样处于从近海保障逐步转向远海保障的... 详细信息

美国全球海军战略对其海洋环境信息保障能力提出较高要求,经过多年发展,美国在海洋环境信息化保障系统方面已形成多层级完善的环境信息保障体系,我国海军正在不断走向远洋,海洋环境信息化保障系统同样处于从近海保障逐步转向远海保障的关键阶段。本文对美国海军海洋环境信息化保障系统开展深入研究,为我国相关领域建设提供参考借鉴。

关键词：美国海军海洋环境信息化保障

Degradation properties of fulvic acid and its microbially driven mechanism from a partial nitritation bioreactor through multi-spectral and bioinformatic analysis

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Journal of Environmental Sciences 2024年第1期135卷 318-331页

作者： Quanhao dou Li Zhang Tingjun Dong Zixuan song Xuepeng Fan Yongzhen Peng Xiayan Wang Jiachun Yang National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery EngineeringBeijing University of TechnologyBeijing 100124China Department of Chemistry and Biology Center of Excellence for Environmental Safety and Biological EffectsBeijing Key Laboratory for Green Catalysis and SeparationBeijing University of TechnologyBeijing 100124China Environmental Protection Development Group Co. Ltd.Shandong 250101China

This study employed multispectral techniques to evaluate fulvic acid(FA)compositional characteristic and elucidate its biodegradation mechanisms during partial nitritation(PN)*** showed that FA removal efficiency(FRE)decreased from 90.22 to 23.11%when FA concentrations in the reactor were increased from 0 to 162.30 mg/L,and that molecular size,degree of aromatization and humification of the effluent FA macromolecules all increased after *** population analysis indicated that the proliferation of the Comamonas,OLB12 and Thauera exhibit high FA utilization capacity in lower concentrations(<50.59 mg/L),promoting the degradation and removal of macromolecular *** addition,the sustained increase in external FA may decrease the abundance of above functional microorganisms,resulting in a rapid drop in ***,from the genetic perspective,the elevated FA levels restricted carbohydrate(ko00620,ko00010 and ko00020)and nitrogen(HAO,AMO,NIR and NOR)metabolism-related pathways,thereby impeding FA removal and total nitrogen loss associated with N_(2)O emissions.

关键词： Partial nitritation Fulvic acid 3DEEM-PARAFAC UV/Vis Microbially driven mechanism

On the use of deep learning for phase recovery

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Light(Science & Applications) 2024年第2期13卷 190-235页

作者： Kaiqiang Wang Li song Chutian Wang Zhenbo Ren Guangyuan Zhao Jiazhen dou Jianglei Di George Barbastathis Renjie Zhou Jianlin Zhao Edmund Y.Lam Department of Electrical and Electronic Engineering The University of Hong KongHong Kong SARChina School of Physical Science and Technology Northwestern Polytechnical UniversityXi’anChina Department of Biomedical Engineering The Chinese University of Hong KongHong Kong SARChina School of Information Engineering Guangdong University of TechnologyGuangzhouChina Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMAUSA

Phase recovery(PR)refers to calculating the phase of the light field from its intensity *** exemplified from quantitative phase imaging and coherent diffraction imaging to adaptive optics,PR is essential for reconstructing the refractive index distribution or topography of an object and correcting the aberration of an imaging *** recent years,deep learning(DL),often implemented through deep neural networks,has provided unprecedented support for computational imaging,leading to more efficient solutions for various PR *** this review,we first briefly introduce conventional methods for ***,we review how DL provides support for PR from the following three stages,namely,pre-processing,in-processing,and *** also review how DL is used in phase image ***,we summarize the work in DL for PR and provide an outlook on how to better use DL to improve the reliability and efficiency of ***,we present a live-updating resource(https://***/kqwang/phase-recovery)for readers to learn more about PR.

关键词： networks phase optics