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Basic Pattern in Atmospheric Turbulence Model

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Communications in Theoretical Physics 2004年第6期41卷 845-848页

作者： FUZun-Tao zhanglin LIUShi-Da LIUShi-Kuo SchoolofPhysics PekingUniversityBeijing100871China StateKeyLaboratoryfor~urbulenceandComplexSystem PekingUniversityBeijing100871China

From the controlling equations of atmosphere motion, Prandtl's mixing length theory is used to derive the atmospheric turbulence models, such as Burgers equation model and Burgers-KdV equation model. And then the projective Riccati equations are applied to solve these atmospheric turbulence models, where much more patterns are obtained, including solitary wave pattern, singular pattern, and so on.

关键词： atmospheric turbulence model Burgers-type equations projective Riccati equations

MiR-1306-5p对鸡前脂肪细胞增殖与分化的影响

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农业生物技术学报 2025年第1期33卷 157-165页

作者：孙楠桢张蕾陈若楠张若彤孙杰石河子大学动物科技学院

miR-1306-5p对肿瘤细胞的增殖具有促进作用，对脂肪细胞增殖与分化的影响尚不明确。课题组前期采集玫瑰冠鸡(Gallus gallus)和科宝鸡胚胎期第8天胸肌组织进行高通量测序，本研究选择测序数据中筛选出的差异表达的miR-1306-5p，旨在探究m... 详细信息

miR-1306-5p对肿瘤细胞的增殖具有促进作用，对脂肪细胞增殖与分化的影响尚不明确。课题组前期采集玫瑰冠鸡(Gallus gallus)和科宝鸡胚胎期第8天胸肌组织进行高通量测序，本研究选择测序数据中筛选出的差异表达的miR-1306-5p，旨在探究miR-1306-5p在鸡前脂肪细胞增殖与分化过程中的功能。利用Targetscan和miRanda软件预测miR-1306-5p的靶基因，以脂肪代谢相关基因—骨形态发生蛋白2(bone morphogenetic protein 2, BMP2)为靶基因构建野生型和突变型载体，与miR-1306-5p模拟物共转染鸡成纤维细胞，利用荧光素酶报告基因检测系统验证二者的靶标关系。以miR-1306-5p模拟物和抑制物分别转染鸡前脂肪细胞，利用CCK-8(Cell Counting Kit-8)试剂盒检测细胞增殖能力，通过油红O染色检测油酸诱导的分化情况。结果显示，BMP2野生型与miR-1306-5p模拟物共转染组的荧光素酶活性较阴性对照极显著下降(P<0.01)，而突变型没有显著变化；miR-1306-5p模拟物转染鸡前脂肪细胞48、72和96h，细胞增殖能力极显著低于阴性对照(P<0.01)；在鸡前脂肪细胞的油酸诱导分化过程中，脂肪酸结合蛋白4(fatty acid binding protein 4, FABP4)基因表达量极显著升高(P<0.01)，而内源性miR-1306-5p和BMP2在诱导分化48和72 h的基因表达量极显著降低(P<0.01)；在鸡前脂肪细胞中转染miR-1306-5p模拟物后脂滴较对照小，转染miR-1306-5p抑制物后脂滴增多。因此，miR-1306-5p可能通过靶向BMP2而抑制鸡前脂肪细胞的分化。本研究为深入探讨miR-1306-5p在鸡前脂肪细胞分化中的作用机制提供基础资料。

关键词：鸡前脂肪细胞 miR-1306-5p 骨形态发生蛋白2(BMP2) 细胞增殖细胞分化

Tuning the porosity of {Co12IICo8III（μ3-OH）24（X）}11+ supramolecular frameworks by reaction time for D2/H2 separation

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Science China Chemistry 2025年

作者： Zhuozhou Xie Zhu Zhuo Zi-Ang nan Qing Li Xiufang Li Zi-Xiu Lu Linzhe Lü Jin Liu Luyao Liu Wenjing Wang Wei Wang Daqiang Yuan You-Gui Huang State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of Sciences State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Systematicly tuning the porosities of porous materials is crucial for targeted gas mixture separation,yet it remains a longstanding *** a common strategy,altering the phenylene ring count in the organic building units has been exploited to adjust pore apertures in metal organic frameworks （MOFs） and covalent organic frameworks （COFs）,resulting in only a stepwise pore size variation of approximately 2.8?.Unlike MOFs and COFs,the porosities for supramolecular assembly frameworks are highly dependent on the packings of the molecular building units in the *** above strategy cannot be applied to supramolecular assembly frameworks and other strategies are required to adjust pore apertures in supramolecular frameworks,especially to achieve porous materials with the optimal pore size for D2/H2separation （～3?）.Here,we successfully modulate the porosity of supramolecular frameworks of[CoII1+12CoIII8L12（μ3-OH）24（X）]1clusters （L=mono-deprotonated 1-iminoisoindole-3-amine,X=ClO?4or Cl?） by controlling the duration of self-assembly *** simply adjusting the reaction time,we obtain three[CoII12CoIII8L12（μ3-OH）24（X）]11+supramolecular frameworks:[CoII12CoIII8（μ3-OH）24（ClO4）L12)]·（Cl）4·（HCO2）7（1）,[CoII12CoIII8L12（μ3-OH）24（Cl）]·（ClOI4）4·（Cl）6·（HCO2）·（H2O）10（2）,and[CoI12CoIII8L12（μ3-OH）24（Cl）]·（Cl）11·（H2O）12（3）.The different stacking patterns of the[CoII12CoIII8L12（μ3-OH）24（X）]11+clusters in these frameworks lead to significantly varied stabilities and *** 1 exhibits permanent porosity with interconnected channels and maintains stability under harsh *** contrast,compound 2 is nearly nonporous,and compound 3 becomes unstable upon *** pores of compound 1 show higher affinity to D2than H2,and the pore aperture diameter of compound 1 （～3.06?） meets the optimal porosity for D2/***,compound 1 demonstrates moderate D2/H2separation at 77 K (retention time:～7 min/g for D2/H2/Ne （10/10/80 vol%） in a flow of 5 mL

关键词：

抗菌压电材料:对细菌无选择性杀伤和不产生细菌耐药性

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中国组织工程研究 2025年第10期29卷 2105-2112页

作者：冯楠李运峰口腔疾病防治全国重点实验室国家口腔医学中心国家口腔疾病临床医学研究中心四川大学华西口腔医院口腔颌面外科四川省成都市610041

背景:压电材料可通过催化作用产生活性氧,通过多种途径来破坏细菌,而且不会导致细菌产生耐药性。这种不依赖抗生素的抗菌方式具有明显的优势,可以对细菌进行无差别的杀伤,为今后的抗菌策略提供了一种新思路。目的:文章主要总结了有关压... 详细信息

背景:压电材料可通过催化作用产生活性氧,通过多种途径来破坏细菌,而且不会导致细菌产生耐药性。这种不依赖抗生素的抗菌方式具有明显的优势,可以对细菌进行无差别的杀伤,为今后的抗菌策略提供了一种新思路。目的:文章主要总结了有关压电材料特性与抗菌机制,并讨论了部分压电材料在抗菌领域的研究现状。方法:在Pub Med、Web of Science、中国知网和万方数据库中,以“压电材料,压电催化,活性氧,抗菌,细菌感染,抗感染,耐药性”为中文检索词,以“piezoelectric materials,piezoelectricity,piezoelectric catalysis,piezocatalysis,reactive oxygen species,ROS,bacterial infection,antibacterial strategies,anti-infection,drug resistance,drug-resistant bacteria”为英文检索词。检索时间范围重点为2013年1月至2023年12月,通过阅读文题和摘要进行初步筛选;排除中英文重复性研究及内容不相关的文献,经文献质量评价后,最后纳入68篇文献进行综述。结果与结论:(1)压电材料是一类性质稳定的环境友好型材料,其大多数具有良好的生物相容性。(2)压电材料在压电效应过程中可催化产生大量活性氧,活性氧可通过细胞外氧化和细胞内氧化,破坏细菌的细胞膜、胞内蛋白质、酶以及核酸等物质,影响细菌的结构和功能,甚至导致细菌死亡从而实现抗菌。抗菌性能与催化生成活性氧速率相关,而催化速率与材料体系、形貌及外界条件等多种因素相关。(3)压电催化产生的活性氧对细菌不具备选择性,因此表现出广谱抗菌性,且这种抗菌方式不需要依赖抗菌药物,故不会引起细菌耐药性问题。(4)结合超声波无创、可控性与穿透性强等优点,未来压电材料作为耐药菌感染的辅助或替代治疗等具有重要价值和巨大潜力。(5)目前压电材料催化效率低下的难题限制了其在抗菌领域的应用,如何提高压电催化效率成为了学者们关注的焦点。

关键词：压电材料纳米材料压电效应压电催化活性氧抗菌治疗抗生素耐药性

国家治理体系和治理能力现代化建设的三重逻辑

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四川文理学院学报 2025年第1期35卷 14-20页

作者：常楠四川文理学院马克思主义学院四川达州635000

国家治理体系和治理能力现代化是新时代治国理政的重要表述,在国家政治经济社会发展过程中扮演着极为重要的角色。研究好国家治理体系和治理能力现代化这一重大课题需要立足于马克思主义基本立场和中国特色社会主义事业基本状况,从提高... 详细信息

国家治理体系和治理能力现代化是新时代治国理政的重要表述,在国家政治经济社会发展过程中扮演着极为重要的角色。研究好国家治理体系和治理能力现代化这一重大课题需要立足于马克思主义基本立场和中国特色社会主义事业基本状况,从提高国家治理能力角度出发去研究新情况、解决新问题,更需要从国家治理的源头上进行正本清源,防止和批判各种错误的治理观。从生成、理论和实践三个方面对习近平总书记关于国家治理体系和治理能力现代化的重要论述进行逻辑分析正是从源头上厘清其发展脉络和主要内容,这对于科学有序推进国家治理体系和治理能力现代化,奋力实现中华民族伟大复兴具有十分重要的理论和现实意义。

关键词：国家治理现代化逻辑人民

Probability Properties of Multi-contact in Protein Molecules

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Chemical Research in Chinese Universities 2003年第3期19卷 370-375页

作者： WANGXiang-hong KEJian-hong HUMin-xiao zhanglin-xi DepartmentofPhysics WenzhouNormalCollegeWenzhou325000P.R.China DepartmentofPhysics ZhejiangUniversityHangzhou310028P.R.China

The compact conformations of polymers are important because the native conformations of all bio-polymers with certain function are highly compact. The properties of mutil-contact bio-polymer chains were studied by Gaussian statistics of the random-flight chain. The theoretical expressions(were given, also), the calculations of probability distributions and correlation functions for different topologic cases were derived and made respectively. Comparison between single, double and triple contacts was also made. By means of setting the parameters, the results of the current calculations of the multiple contacts are just the same as those calculated by single, double or tripe contacts separately. It is a useful method to investigate native conformations of biopolymers. The probabilities of multi contacts and correlation functions between chain 's contacts were calculated for the Gaussian chains. Because the bond probability distributions are Gaussian 's distributions, the probability distributions of the separations of various points along the chains are always consecutive. All the contacts may break up into several groups, and each group consists of many contacts. Here we investigated the probability distribution from one group to three groups of contacts.

关键词： Random-flight model Protein molecule Correlation function

Heat exposure impairs porcine oocyte quality with suppressed actin expression in cumulus cells and disrupted F-actin formation in transzonal projections

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Journal of Animal Science and Biotechnology 2020年第3期11卷 703-714页

作者： Chao Yin Jie Liu zhanglin Chang Bin He Yang Yang Ruqian Zhao MOE Joint International Research Laboratory of Animal Health&Food Safety Nanjing Agricultural UniversityNanjingJiangsuChina Key Laboratory of Animal Physiology and Biochemistry Ministry of AgricultureNanjing Agricultural UniversityNo.1 Weigang RoadNanjing 210095China College of Animal Science and Technology Jiangxi Agricultural UniversityNanchangJiangxiChina

Background:Transzonal projections(TZPs)constitute a structural basis for the communication between the oocyte and its surrounding cumulus cells(CCs),which play critical roles in promoting the oocyte *** we found that heat stress(HS)causes loss of TZPs in porcine cumulus-oocyte complexes(COCs)with decreased density of filamentous actin(F-actin).However,the time-course responses of F-actin and its monomeric actins(β-actin andγ-actin)during the in vitro maturation of oocytes remain ***:In this study,excised porcine ovaries were exposed to HS at 41.5°C for 1 h before COCs were isolated and matured in vitro for 44 *** significantly reduced oocyte quality,characterized by impaired cumulus expansion,delayed meiotic resumption and lower survival rate and polar body extrusion rate,as well as decreased expression of mitochondrial DNA-encoded genes and elevated mitochondrial reactive oxygen species *** ofβ-actin andγ-actin in CCs increased gradually with oocytes maturation,which was significantly reduced in HS group,especially at 24 h and/or 44 h of in vitro *** contrast,the number of TZPs and the fluorescence intensity of F-actin in zona pellucida decreased gradually during oocytes maturation,which were significantly reduced by HS at 24 h of in vitro ***,colocalization analyses revealed bothβ-actin andγ-actin contribute to the F-actin formation in porcine TZPs,and the colocalization of F-actin with GJ protein connexin 45 was significantly reduced in heat-exposed ***:The results indicate that the suppression of actin expressions in CCs,which may lead to the F-actin unstabilization in TZPs,will subsequently contribute to the compromised quality of oocytes under HS.

关键词： Actin Cumulus cell Gilt Heat stress Oocyte

The phytochemical components of walnuts and their application for geographical origin based on chemical markers

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Food Quality and Safety 2022年第4期6卷 562-570页

作者： Runhong Mo Yuewen Zheng zhanglin Ni Danyu Shen Yihua Liu Research Institute of Subtropical Forestry Chinese Academy of ForestryFuyang DistrictHangzhouChina

Place of origin has an important influence on walnut quality and commercial value,which results in the requirement of rapid geographical traceability ***,a method for geographical origin identification of walnuts on the basis of nutritional quality of walnuts from China was *** concentrations of 43 phytochemical components were analyzed in walnut samples from five different walnut-producing regions of *** on 14 chemical markers selected by the Random Forest method from these phytochemical components,a new discriminant model for geographical origin was built,with the corresponding correct classification rate of 99.3%.In addition,the quantitative quality differences of walnuts from five regions were analyzed,with values of 0.17–***,the top three chemical markers for the geographical origin discriminant analysis were Mo,V,and stearic acid,with contribution rates of 26.8%,18.9%,and 10.9%,*** study provides a potentially viable method for application in food authentication.

关键词： Walnut chemical marker geographical origin Random Forest method discriminant model

AN IMPROVED LP MODEL FOR ENERGY OPTIMIZATION OF THE INTEGRATED IRON AND STEEL PLANT WITH A COGENERATION SYSTEM IN CHINA

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Journal of Systems Science and Systems Engineering 2016年第4期25卷 515-536页

作者： zhanglin Peng Chao Fu Keyu Zhu Qiang Zhang Dawei Ni Shanlin Yang School of Management Hefei University of Technology Hefei 230009 Anhui China

In an integrated iron and steel plant with a cogeneration system, recycled energy is continuously transported into the cogeneration system and the electricity is continuously generated, and both of them could not be stored for a long time. Moreover, thegeneration and consumption of electricity is irregular, which may bring about more unexpected imbalances. Therefore, it is a crucial issue to schedule the entire energy system by optimizing the operation of energy utilization, which includes the raw energy in the production system, the generation electricity in the cogeneration system and the recycled energy in these two systems. In this paper, an improved Linear Programming model for energy optimization in the integrated iron and steel plant with a cogeneration system is established. The improved model focuses on controlling the whole energy flow and scheduling the whole energy consumption in the entire energy system between the production system and cogeneration system through optimizing all kinds of energy distribution and utilization in an integrated iron and steel plant with a cogeneration system. Case study shows that the improved model offers the optimal operation conditions at the higher energy utilization, lower energy cost and lower pollution emissions.

关键词： Integrated iron and steel plant energy optimization linear programming recycled energy