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Distinct roles of H3K27me3 and H3K36me3 in vernalization response,maintenance,and resetting in winter wheat

Science China(Life Sciences) 2024年第10期67卷 2251-2266页

作者： xuemei Liu Min Deng Bingxin Shi Kehui Zhu Jinchao Chen Shujuan Xu Xiaomin Bie Xiansheng Zhang Xuelei Lin Jun Xiao Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Institute of Science and Technology Austria(ISTA) Klosterneuburg 3400Austria National Key Laboratory of Wheat Improvement College of Life SciencesShandong Agricultural UniversityTai’an 271018China Centre of Excellence for Plant and Microbial Science(CEPAMS) JIC-CASBeijing 100101China

Winter plants rely on vernalization,a crucial process for adapting to cold conditions and ensuring successful ***,understanding the role of histone modifications in guiding the vernalization process in winter wheat remains *** this study,we investigated the transcriptome and chromatin dynamics in the shoot apex throughout the life cycle of winter wheat in the *** core histone modifications,H3K27me3 and H3K36me3,exhibited opposite patterns on the key vernalization gene VERNALIZATION1(VRN1),correlating with its induction during cold ***,the H3K36me3 level remained high at VRN1 after cold exposure,which may maintain its active *** in FERTILIZATION-INDEPENDENT ENDOSPERM(TaFIE)and SET DOMAIN GROUP 8/EARLY FLOWERING IN SHORT DAYS(TaSDG8/TaEFS),components of the writer complex for H3K27me3 and H3K36me3,respectively,affected flowering ***,VRN1 lost its high expression after the cold exposure memory in the absence of *** embryo development,VRN1 was silenced with the removal of active histone modifications in both winter and spring wheat,with selective restoration of H3K27me3 in winter *** mutant of Tafie-cr-87,a component of H3K27me3“writer”complex,did not influence the silence of VRN1during embryo development,but rather attenuated the cold exposure requirement of winter *** gene expression with H3K27me3 and H3K36me3 patterns identified potential regulators of *** study unveils distinct roles of H3K27me3 and H3K36me3 in controlling vernalization response,maintenance,and resetting in winter wheat.

关键词： vernalization H3K27me3 H3K36me3 winter wheat resetting maintenance

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超声诊断儿童肠系膜淋巴结炎120例临床分析

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中国社区医师 2014年第19期 108-109页

作者：周学梅江苏省苏州市工业园区娄葑医院车坊分院

目前,我国对于儿童肠系膜淋巴结炎的研究相对较少,儿童肠系膜淋巴结炎在实际治疗中常会发生误诊,导致很多患者不能够得到及时正确的医治,对于患者身体健康是一种极大的损害。本文通过对120例肠系膜淋巴结炎儿童临床病例发病情况以及发... 详细信息

目前,我国对于儿童肠系膜淋巴结炎的研究相对较少,儿童肠系膜淋巴结炎在实际治疗中常会发生误诊,导致很多患者不能够得到及时正确的医治,对于患者身体健康是一种极大的损害。本文通过对120例肠系膜淋巴结炎儿童临床病例发病情况以及发病病因进行分析,简要地介绍了导致儿童肠系膜淋巴结炎的病因以及相关的治疗方法,并且重点对超声诊断流程以及要点进行了描述,希望能够为我国儿童肠系膜淋巴结炎的诊断治疗提供一些参考意见。

关键词：肠系膜淋巴结炎超声诊断临床分析

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基于Bowyer-Watson三角网生成算法的研究

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计算机工程与应用 2013年第6期49卷 198-200页

作者：周雪梅黎应飞贵州大学计算机科学与信息学院贵阳550025 贵州大学教务处贵阳550025

不规则三角网(Triangulated Irregular Network,TIN)在表示地形的形态方面具有较好的表现,其生成算法一直备受关注。讨论了三角网的数据结构的设计,采用逐点插入算法中的Bowyer-Watson算法思想为研究重点,设计并实现了该算法,对算法实... 详细信息

不规则三角网(Triangulated Irregular Network,TIN)在表示地形的形态方面具有较好的表现,其生成算法一直备受关注。讨论了三角网的数据结构的设计,采用逐点插入算法中的Bowyer-Watson算法思想为研究重点,设计并实现了该算法,对算法实验过程中可能出现的交叉现象进行分析,给出算法的改进。该改进算法已用于地形的可视化建模中,获得了较好的效果,对于三角剖分的相关研究具有一定的价值。

关键词：不规则三角网 Delaunay三角剖分凸壳

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A triboelectric nanogenerator based on a spiral rotating shaft for efficient marine energy harvesting of the hydrostatic pressure differential

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Materials Reports(Energy) 2024年第3期4卷 69-76页

作者： xuemei Song Yuan Chao Pan Chang Bao Han Chang Xin Liu Yaxiaer Yalikun Hui Yan Yang Yang Key Laboratory of Advanced Functional Materials(Beijing University of Technology) Ministry of EducationBeijing Key Lab of Microstructure and Property of Advanced MaterialsBeijing University of TechnologyBeijing100124PR China Institute of Deep-Sea Science and Engineering Chinese Academy of SciencesSanya572000PR China Division of Materials Science Nara Institute of Science and Technology8916-5 Takayama-choIkomaNara630-0192Japan

Equipment used in underwater sensing and exploration typically relies on cables or batteries for energy supply,resulting in a limited and inconvenient energy supply and marine environmental pollution that hinder the sustainable development of distributed ocean sensing ***,we design a deep-sea differential-pressure triboelectric nanogenerator(DP-TENG)based on a spiral shaft drive using modified polymer materials to harness the hydrostatic pressure gradient energy at varying ocean depths to power underwater *** spiral shaft structure converts a single compression into multiple rotations of the TENG rotor,achieving efficient conversion of differential pressure *** multi-pair electrode design enables the DP-TENG to generate a peak current of 61.7μA,the instantaneous current density can reach 0.69μA cm^(-2),and the output performance can be improved by optimizing the spiral angle of the *** DP-TENG can charge a 33μF capacitor to 17.5 V within five working *** can also power a digital calculator and light up 116 commercial power light-emitting diodes,demonstrating excellent output *** its simple structure,low production cost,and small form factor,the DP-TENG can be seamlessly integrated with underwater *** results hold broad prospects for underwater blue energy harvesting and are expected to contribute to the development of self-powered equipment toward emerging“smart ocean”and blue economy applications.

关键词： Triboelectric nanogenerators Blue energy Energy harvesting Differential pressure energy Self-power sensor

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氯盐和氟盐快堆增殖特性研究

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核技术 2020年第4期43卷 1-6页

作者：周雪梅李冬国何燎原刘桂民中国科学院上海应用物理研究所上海201800 中国科学院先进核能创新研究院上海201800 中国科学院大学北京100049

熔盐快堆具有燃料增殖、核废料嬗变和固有安全性等方面的突出优点,是目前备受关注的第四代先进核能系统唯一使用液态燃料的核反应堆。熔盐快堆通常选用液态氟盐或氯盐作为燃料载体盐和冷却剂,高增殖特性是其主要特征参数之一。基于双流... 详细信息

熔盐快堆具有燃料增殖、核废料嬗变和固有安全性等方面的突出优点,是目前备受关注的第四代先进核能系统唯一使用液态燃料的核反应堆。熔盐快堆通常选用液态氟盐或氯盐作为燃料载体盐和冷却剂,高增殖特性是其主要特征参数之一。基于双流体熔盐堆堆芯结构,采用基于反应堆安全分析和设计的综合性模拟程序SCALE(Standardized Computer Analyses for Licensing Evaluation)对两种氟盐快堆和一种氯盐快堆在同一重金属溶解度下的U-Pu燃料增殖比进行模拟计算,对不同增殖层和反射层下的增殖比进行了模拟分析,并分析了氯盐快堆在增殖层和反射层变化时,裂变区和增殖区中子能谱的变化情况。结果表明:在相同温度、相同摩尔比下,氯盐快堆比氟盐快堆具有更高的U-Pu燃料增殖比;氯盐快堆的增殖比随着增殖层和反射层厚度的增加而增加,但是增殖比的增长速率有所减弱;氟盐快堆的增殖层在厚度尺寸较小时,其变化对增殖比有较小影响,当厚度增至60 cm时,增殖层厚度尺寸的变化几乎对增殖比没有影响;氟盐快堆的反射层尺寸的变化对增殖比没有影响;增殖层和反射层厚度的改变不影响堆芯临界状态和裂变区中子能谱。这为三种熔盐快堆的基盐选择及尺寸设计从增殖方面提供了理论依据。

关键词：氯盐快堆氟盐快堆增殖比中子能谱

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Abipartite molecular module controls cell death activation in the basal cell lineage of plant embryos

Abipartite molecular module controls cell death activation i...

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2013全国植物生物学大会

作者： ZHAO Peng zhou xuemei ZHANG Liyao WANG Wei MA Ligang YANG Libo PENG Xiongbo Peter V.Bozhkov SUN Mengxiang Department of Cell and Developmental Biology College of Life ScienceState Key Laboratory of Plant Hybrid RiceWuhan University Department of Plant Biology and Forest Genetics Uppsala BioCenterSwedish University of Agricultural Sciences and Linnean Center for Plant BiologyUppsalaSweden

Plant zygote divides asymmetrically into an apical cell that develops into the embryo proper and a basal cell that generates the suspensor,a vital organ functioning as a conduit of nutrients and growth factors to the embryo *** the suspensor has fulfilled its function, it is removed by programmed cell death(PCD) at the late stages of *** molecular trigger of this PCD is *** we use tobacco(Nicotiana tabacum) embryogenesis as a model system to demonstrate that the mechanism triggering suspensor PCD is based on the antagonistic action of two proteins:a protease inhibitor,cystatin NtCYS,and its target,cathepsin H-like protease *** is expressed in the basal cell of the proembryo,where encoded cystatin binds to and inhibits NtCP14,thereby preventing precocious onset of PCD. The anti-cell death effect of NtCYS is transcriptionally regulated and is repressed at the 32- celled embryo stage,leading to increased NTCP14 activity and initiation of *** of NtCYS or overexpression of NtCP14 induces precocious cell death in the basal cell lineage causing embryonic arrest and seed ***,overexpression of NtCYS or silencing of NtCP14 leads to profound delay of suspensor *** results demonstrate that NtCYS-mediated inhibition of NtCP14 protease acts as a bipartite molecular module to control initiation of PCD in the basal cell lineage of plant embryos.

关键词： embryogenesis suspensor programmed cell death cystatin cathepsin tobacco

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网络思政对新时代大学生确立马克思主义信仰的作用机制研究

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铜陵职业技术学院学报 2022年第1期21卷 5-9页

作者：周学梅铜陵职业技术学院安徽铜陵244000

随着“互联网+”时代的到来,大学生更是网络社会的主体。利用互联网营造良好的马克思主义信仰环境、加快构建中国特色社会主义哲学社会科学体系和教材体系、着力锻造高素质的思想政治教育队伍、努力创新高校思想政治教育新模式等才能有... 详细信息

随着“互联网+”时代的到来,大学生更是网络社会的主体。利用互联网营造良好的马克思主义信仰环境、加快构建中国特色社会主义哲学社会科学体系和教材体系、着力锻造高素质的思想政治教育队伍、努力创新高校思想政治教育新模式等才能有助于新时代大学生确立马克思主义信仰,他们才能更好地成长为社会主义事业的建设者和接班人。

关键词：网络思政新时代大学生马克思主义信仰作用机制

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Application Analysis of Nursing Students'Grades in Course Relevance Based on Association Rule Mining Algorithm Apriori

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Journal of Contemporary Educational Research 2024年第2期8卷 213-223页

作者： xuemei Li Edward CJimenez Angeles University Foundation PhD Educ-EMMacArthur HwyAngeles2009 PampangaPhilippines Shandong College of Traditional Chinese Medicine Educational Technology CenterYantai 264199Shandong ProvinceChina

By analyzing the correlation between courses in students’grades,we can provide a decision-making basis for the revision of courses and syllabi,rationally optimize courses,and further improve teaching *** the help of IBM SPSS Modeler data mining software,this paper uses Apriori algorithm for association rule mining to conduct an in-depth analysis of the grades of nursing students in Shandong College of Traditional Chinese Medicine,and to explore the correlation between professional basic courses and professional core ***,according to the detailed analysis of the mining results,valuable curriculum information will be found from the actual teaching data.

关键词： Grade analysis Apriori algorithm Course relevance Data mining

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