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Temperature is a cryptic factor shaping the geographical pattern of genetic variation in Ceratophyllum demersum across a subtropical freshwater lake

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Plant Diversity 2024年第5期46卷 630-639页

作者： Yixian Li Xuyao Zhao Manli Xia Xinzeng Wei hongwei hou The State Key Laboratory of Freshwater Ecology and Biotechnology The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of SciencesInstitute of HydrobiologyChinese Academy of SciencesWuhan 430072HubeiChina University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074HubeiChina

Macrophyte habitats exhibit remarkable heterogeneity,encompassing the spatial variation of abiotic and biotic components such as changes in water conditions and weather as well as anthropogenic *** factors are thought to be important drivers shaping the genetic and epigenetic variation of aquatic ***,the links among genetic diversity,epigenetic variation,and environmental variables remain largely unclear,especially for clonal aquatic ***,we performed population genetic and epigenetic analyses in conjunction with habitat discrimination to elucidate the environmental factors driving intraspecies genetic and epigenetic variation in hornwort(Ceratophyllum demersum)in a subtropical *** factors were highly correlated with the genetic and epigenetic variation of ***,with temperature being a key driver of the genetic *** temperature was detected to be correlated with greater genetic and epigenetic *** and epigenetic variation were positively driven by water temperature,but were negatively affected by ambient air *** findings indicate that the genetic and epigenetic variation of this clonal aquatic herb is not related to the geographic feature but is instead driven by environmental conditions,and demonstrate the effects of temperature on local genetic and epigenetic variation in aquatic systems.

关键词： Genetic diversity Epigenetic variation Temperature Macrophyte Restoration

A simple strategy for constructing acylhydrazone photochromic system with visible color/emission change and its application in photo-patterning

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Chinese Chemical Letters 2020年第12期31卷 3271-3275页

作者： Yuanyuan Liu Qiuchen Peng Yuanyuan Li hongwei hou Kai Li Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China School of Chemistry and Chemical Engineering Henan University of TechmologyZhengzhou 450001China

As a potential photochromic system,acylhydrazones exhibit many outstanding adva ntages including low cost,simple synthesis and high modifiability compared with some classic photochromic ***,the absorption wavelengths of acylhydrazones usually locate in ultraviolet regio n,which makes the band separation between the absorbance maxima of its irradiated and unirradiated forms cannot be observed by naked eyes and greatly limits their practical *** this work,a simple strategy for constructing acylhydrazone photochromic system with visible color/emission change is *** 6 G hydrazine-2-aldehyde-pyridine Schiff base(compound 3)is designed and synthesized by combining acylhydrazone with Rhodamine 6 G *** introduction of Rhodamine 6 G moiety to 3 not only makes it remain all the advantages of acylhydrazone photochromic system but also exhibits visible photo-induced color/emission changes both in solution and in a solid ***,3 exhibits reversible photochromic property with good fatigue re sistance,which makes it an excellent candidate for p hoto-patterning.

关键词： Photochromism Acylhydrazone Rhodamine6G E/Z isomerization Photo-patternin

Enhancement of visible-light-driven oxidative amine coupling under aerobic and anaerobic conditions by photocatalyst with spatial separation of photoinduced charge carriers

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Nano Research 2023年第4期16卷 4715-4722页

作者： Shasha Wang Kuan Gao Yang Cui Shuwen Li Heyao Zhang Bin Zhang Jie Wu hongwei hou Shuangquan Zang Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of Science Xuchang UniversityXuchang 461000China

Spatial separation of oxidation/reduction cocatalyst is an effective means to improve the efficiency of charge separation in photocatalytic reaction ***,a yolk-shell Pd@NH_(2)-UiO-66@Cu_(2)O heterojunction was designed and synthesized by integration of electron collector Pd and hole collector Cu_(2)O inside and outside of a photoactive metal-organic framework(MOF)NH_(2)-UiO-66,*** obtained Pd@NH_(2)-UiO-66@Cu_(2)O heterojunction effectively inhibits the electron and hole recombination through the photo-induced electrons and holes flow inward and outward of the composite,and promotes the reduction and oxidation abilities for the oxidative coupling of benzylamine to *** with Pd/NH_(2)-UiO-66@Cu_(2)O,Pd@NH_(2)-UiO-66,and Pd/NH_(2)-UiO-66,Pd@NH_(2)-UiO-66@Cu_(2)O exhibits the highest photocatalytic *** importantly,Pd@NH_(2)-UiO-66@Cu_(2)O shows a conversion rate of benzylamine up to 99%either by oxidation under aerobic conditions or by strong adsorption of H atom(Hads)under anaerobic *** addition,the catalyst shows good stability and can be recycled at least ten *** work provides useful guidance on construction of MOFs-based composites with spatially separated photoinduced charge carriers to realize efficient oxidation coupling of benzylamine in both aerobic and anaerobic conditions.

关键词： metal-organic frameworks palladium nanoparticle photocatalysis cuprous oxide oxidative coupling of amines

Structure and magnetism of a porous three-dimensional metal-organic framework based on planar tetranuclear copper(Ⅱ) cluster units

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Science China Chemistry 2010年第10期53卷 2118-2122页

作者： LI HuiJun, ZHANG ErPeng, GUO QianQian, hou hongwei & FAN YaoTing Department of Chemistry, Zhengzhou University, Zhengzhou 450052, China Department of Chemistry Zhengzhou University Zhengzhou China

A porous three-dimensional copper(Ⅱ) metal-organic framework (MOF) {[Cu2(tci)(OH)(pip)0.5(H2O)]·6H2O}n (1) [tci = tris (2-carboxyethyl)isocyanurate, pip = piperazine] has been generated under hydrothermal conditions at 120 °C. Single crystal X-ray diffraction reveals that the polymer exhibits a novel three-dimensional framework based on planar tetranuclear copper(Ⅱ) cluster units. The variable temperature magnetic susceptibility data in the range 2-280 K show antiferromagnetic spin-spin coupling in the tetranuclear unit in complex 1. A theoretical fitting of the magnetic data gives J values of -31.3 cm-1, -30.8 cm-1, and 13.5 cm-1.

关键词： metal–organic framework tetranuclear copper cluster unit topology magnetism

Characterization of distinct microbiota associated with androgenetic alopecia patients treated and untreated with platelet-rich plasma(PRP)

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Animal Models and Experimental Medicine 2024年第2期7卷 106-113页

作者： Qian Zhang Yanan Wang Cheng Ran Yingmei Zhou Zigang Zhao Tianhua Xu hongwei hou Yuan Lu Beijing Life Science Academy BeijingChina Department of Pathology Affiliated Hospital of Hebei UniversityBaodingChina Department of Otolaryngology Affiliated Hospital of Hebei UniversityBaodingChina Department of Dermatology Huazhong University of Science and Technology Union Shenzhen HospitalShenzhenChina Department of Dermatology Hainan Hospital of PLA General HospitalSanyaChina Department of Chemical Engineering Tsinghua UniversityBeijingChina

Background:Androgenic alopecia(AGA)is the most common type of hair loss in men,and there are many studies on the treatment of hair loss by platelet-rich plasma(PRP).The human scalp contains a huge microbiome,but its role in the process of hair loss remains unclear,and the relationship between PRP and the microbiome needs further ***,the purpose of this study was to investigate the effect of PRP treatment on scalp microbiota ***:We performed PRP treatment on 14 patients with AGA,observed their clinical efficacy,and collected scalp swab samples before and after *** scalp microflora of AGA patients before and after treatment was characterized by amplifying the V3-V4 region of the 16 s RNA gene and sequencing for bacterial ***:The results showed that PRP was effective in the treatment of AGA patients,and the hair growth increased *** results of relative abundance analysis of microbiota showed that after treatment,g_Cutibacterium increased and g_Staphylococcus decreased,which played a stable role in scalp *** addition,g_Lawsonella decreased,indicating that the scalp oil production decreased after ***:The findings suggest that PRP may play a role in treating AGA through scalp microbiome rebalancing.

关键词： androgenic alopecia microbiome platelet-rich plasma scalp

Nicotine-induced transcriptional changes and mitochondrial dysfunction in the ventral tegmental area revealed by single-nucleus transcriptomics

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Journal of Genetics and Genomics 2024年第11期51卷 1237-1251页

作者： Lei Fan Boxin Liu Ru Yao Xia Gao Hongjuan Wang Sanjie Jiang Xiaomin Zheng Huan Chen hongwei hou Yong Liu Qingyuan Hu Anhui Institute of Optics and Fine Mechanics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefeiAnhui 230000China University of Science and Technology of China HefeiAnhui 230000China Beijing Life Science Academy Beijing 100000China Key Laboratory of Tobacco Biological Effects and Biosynthesis Bejing 100000China China National Tobacco Quality Supervision&Test Center ZhengzhouHenan 450000China Key Laboratory of Tobacco Biological Effects ZhengzhouHenan 450000China BGI Genomics BGI-ShenzhenGuangdong 518018China

Nicotine is widely recognized as the primary contributor to tobacco *** studies have indicated that molecular and behavioral responses to nicotine are primarily mediated by ventral tegmental area(VTA)neurons,and accumulating evidence suggests that glia play prominent roles in nicotine ***,VTA neurons and glia have yet to be characterized at the transcriptional level during the progression of nicotine ***,a male mouse model of nicotine self-administration is established and the timing of three critical phases(pre-addiction,addicting,and post-addiction phase)is ***-nucleus RNA sequencing in the VTA at each phase is performed to comprehensively classify specific cell *** changes occurred during the addicting and post-addiction phases,with the addicting phase displaying highly dynamic neuroplasticity that profoundly impacts the transcription in each cell ***,significant transcriptional changes in energy metabolism-related genes are observed,accompanied by notable structural alterations in neuronal mitochondria during the progression of nicotine *** results provide insights into mechanisms underlying the progression of nicotine addiction,serving as an important resource for identifying potential molecular targets for nicotine cessation.

关键词： Single-nucleus transcriptomics Ventral tegmental area Nicotine addiction Cell-type-specific alteration Mitochondrial dysfunction

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矿用永磁直驱电动机温度场研究与分析

煤炭科学技术 2021年第6期49卷 219-224页

作者：侯红伟秦翥中国煤炭科工集团上海研究院有限公司上海200030

针对低速大功率矿用永磁直驱电动机谐波含量较高、多物理场耦合、流体场复杂等特性造成电动机部件发热、磁场畸变严重等若干问题,对500 kW、60 r/min分数槽集中绕组矿用隔爆永磁直驱电动机进行损耗分析,得出定子铜损耗占总损耗比例最高... 详细信息

针对低速大功率矿用永磁直驱电动机谐波含量较高、多物理场耦合、流体场复杂等特性造成电动机部件发热、磁场畸变严重等若干问题,对500 kW、60 r/min分数槽集中绕组矿用隔爆永磁直驱电动机进行损耗分析,得出定子铜损耗占总损耗比例最高,其次为定子铁心损耗及转子永磁体损耗。根据损耗特点,在电动机外部设置水套机座,内部通过风扇形成循环风路的冷却结构,使定子的铜损耗与铁损耗,通过热传导传至机座;定子铁心与水套机座采用热套结构,增加传热效果;定子端部热量经过铜绕组传至直线段,再由定子铁心传走;采用镀层分块、转子轭部叠片式结构,将转子永磁体热量携至定子铁心轭部并由机座冷却水携出。通过迭代计算的方式验证了当给定来流温度且电动机定子内径圆面处绝热时,转子热量将加载至定子轭部孔;当转子气隙空气温度加载到定子内径面处时,电动机部件基本达到热平衡。最后,截取该电动机定子轴向1/2半齿半槽及转子径向1/8作为仿真对象,利用Realizable k-ε模型对带有冷却结构的模型对象进行三维温度场仿真分析与数据统计。结果表明:低速大功率矿用永磁直驱电动机在冷却结构的协同作用下,可以有效降低定子端部及转子磁体产生的热量,减少转子引起的绕组发热不均及定子铜耗问题,确保电动机定子绕组和转子永磁体等主要电磁部件在安全温度范围内稳定运行,为低速大功率永磁直驱电动机在结构优化方面提供了理论依据。

关键词：永磁直驱电动机损耗分析冷却结构温度场煤矿

Improved Catalytic Activity of a Cd Metal-Organic Framework via Central-metal Exchange in a Single-Crystal to Single-Crystal Manner

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Improved Catalytic Activity of a Cd Metal-Organic Framework ...

Solvent Induced Three Silver Metal-organic Materials as Catalysts for Tandem Acylation-Nazarov Cyclization

中国化学会第九届全国无机化学学术会议

作者： Huarui Wang Chao Huang hongwei hou The College of Chemistry and Molecular Engineering Zhengzhou University

Central-metal exchange offers an attractive strategy for the incorporation of catalytically active metal centers in MOFs.1 For instance,after replacing the inactive CdⅡ ions in porph@MOM-10 with MnⅡ or CuⅡ,the product could catalyze the epoxidation of trans-stilbene with 75%conversion（compared to only 7%conversion provided by the original CdⅡ containing porph@MOM-10）.2 Improving catalytic activity through central-metal exchange is only just *** of excluding the effect of ligands and geometries,the research of isostructural MOFs before and after central-metal exchange is beneficial to find out the relationship between the central-metal ions and corresponding catalytic property of *** of 5,5’-（1H-2,3,5-triazole-1,4-diyl）diisophthalic acid（H4L）and Cd（NO3）2 in the presence of pyridine afforded{[Cd2（L）（py）3]·2H2O}n（1）（py=pyridine）.Central-metal exchange in 1 via a single-crystal-to-single-crystal manner leads to a series of isostructural M（Ⅱ）-Cd frameworks[M=Cu（2a）,Co（2b）,Ni（2c）]showing improved catalytic activity for the synthesis of1,4,5,6-tetrahedropyrimidine *** on that,a plausible mechanism for the catalytic reaction has been proposed and the reactivity-structure relationship has been further clarified.

关键词： Metal-organic frameworks Single-crystal to single-crystal Central-metal exchange Improved catalytic activity

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Solvent Induced Three Silver Metal-organic Materials as Cata...