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Journal of Innovative Optical Health Sciences 2024年第2期17卷 59-66页

作者： dongmin zhang Guang Yang Yao Tan Chong Chen Jie zhang Hui Li School of Biomedical Engineering(Suzhou)Division of Life Sciences and Medicine University of Science and Technology of China Hefei 230041 P.R.China Suzhou Institute of Biomedical Engineering and Technology Chinese A cademy of Sciences Suzhou Jiangsu 215163P.R.China

Light-sheet fluorescence microscopy(LSFM)has been widely used to image the three-dimensional(3D)structures and functions of various millimeter-size bio-specimen such as zebrafish.However,the sample adsorption and scattering cause shading of the light-sheet illumination,preventing the even 3D image of thick samples.Herein,we report a continuous-rotational light-sheet microscope(CR-LSM)that enables simultaneous 3D bright-field and fluorescence imaging.With a high-accuracy rotational stage,CR-LSM records the outline projections and the fluorescent images of the sample at multiple rotation angles.Then,3D morphology and fluorescent structure were reconstructed with a developed algorithm.Using CR-LSM,zebrafish’s whole-fish contour and blood vessel structures were obtained simultaneously.

关键词： Light-sheet microscope zebrafish blood vessels morphology

Design and fabrication of Nd-Fe-B magnet with excellent thermal stability

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Journal of Rare Earths 2024年第5期42卷 980-986,I0006页

作者： Rui Han Shengzhi Dong Dong Li dongmin zhang Hongsheng Chen Jiyuan Xu George CHadjipanayis Zhuolin Li Ying zhang Wei Li Division of Functional Materials Research Central Iron and Steel Research InstituteBeijing100081China Department of Physics and Astronomy Sharp Lab University of DelawareNewarkDE19716USA Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing100190China

A novel Nd-Fe-B type permanent magnet with excellent thermal stability was designed by Co replacing Fe in the main phase and the grain boundary phase.The remanence and coercivity temperature coefficient reach 0.058%/℃and 0.465%/℃in the te mperature range from 25 to 100℃,which are much lower than those of commercial Nd-Fe-B magnet.An enhanced Curie temperature is obtained for the novel magnet due to the Co substitution,which significantly improves the operating temperature.The microstructure result reveals that an amorphous phase exists in the intergranular grains which is probably responsible for the deterioration of intrinsic coercivity.This work can provide a reference for the design and optimization of components of sintered Nd-Fe-B magnets with excellent thermal stability.

关键词： Thermal stability Remanence temperature coefficient Operating temperature Atomic substitution Rare earths

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论榜样精神的生成逻辑、丰富意蕴及时代价值

大理大学学报 2024年第3期9卷 109-115页

作者：王再新张栋敏桂林电子科技大学马克思主义学院广西桂林541004 晋中学院马克思主义学院山西晋中030619

在中国革命、建设和改革的各个历史时期涌现出了无数的榜样,这些榜样的事迹和精神,影响教育着一代又一代中国人不懈奋进、勇往直前。榜样精神有着明晰的生成逻辑:厚重文化是榜样精神生成的基础,时代召唤是榜样精神孕育的契机,扎根实践... 详细信息

在中国革命、建设和改革的各个历史时期涌现出了无数的榜样,这些榜样的事迹和精神,影响教育着一代又一代中国人不懈奋进、勇往直前。榜样精神有着明晰的生成逻辑:厚重文化是榜样精神生成的基础,时代召唤是榜样精神孕育的契机,扎根实践是榜样精神生成的沃土。这一生成逻辑赋予榜样精神丰富的意蕴:坚定信念、崇德向善、求真务实、艰苦奋斗、甘于奉献、率先垂范、守正创新。榜样精神为新时代培育和践行社会主义核心价值观提供了丰富的精神滋养,巩固着全党全国人民共同团结奋斗的思想根基,凝聚着新时代奋进的磅礴伟力,因而具有深厚的时代价值。

关键词：榜样精神生成逻辑价值意蕴

Research on Influence Factors of Pig Farmers' Ecological Farming Behavior: Based on the TPB and SEM

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Asian Agricultural Research 2016年第2期8卷 19-27页

作者： Chengying HAN Zhenhong QI dongmin zhang Xinrui LI College of Economics & Management Huazhong Agricultural University College of Life Sciences & Technology Huazhong Agricultural University

China's extensive development model of pig industry gives rise to serious resource and environment bottleneck restriction,it is urgent to transform the existing development model into ecological farming model. In this process,farmers' behavior will play a key role. On the basis of summarizing development connotation and characteristics of ecological agriculture,using survey data of 323 pig farmers in 6 provinces,based on the Theory of Planned Behavior( TPB) it introduced individual characteristics and external environment constraint variables,and made an empirical analysis on factors influencing intention and behavior of pig farmers' ecological farming using the Structural Equation Model( SEM). Results indicate:( i) ecological farming intention of pig farmers has the largest direct effect on their ecological farming behavior;( ii)ecological farming cognition of pig farmers has significant positive effect on their ecological farming behavior;( iii) external environment has the largest indirect effect on their ecological farming behavior,followed by the overall effect,and external environment has significant positive effect on ecological farming attitude and cognition of pig farmers;( iv) individual characteristics( educational level and income level) of pig farmers influence ecological farming behavior of pig farmers through their ecological farming attitude and intention,but the degree of influence is limited.

关键词： Ecological farming behavior Influence factors Pig farmers Theory of Planned Behavior(TPB) Structural Equation Model(SEM)

紫苏叶提取物对糖尿病肾脏病大鼠肾纤维化及Notch/Snail1信号通路的影响

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国际内分泌代谢杂志 2024年第3期44卷 150-154,211页

作者：张清叶晓萍胥勋梅张栋珉钱娴静绵阳市第三人民医院(四川省精神卫生中心)内分泌科绵阳621000 绵阳市中医医院门诊部绵阳621000

目的分析紫苏叶提取物对糖尿病肾脏病大鼠肾纤维化及Notch/锌指蛋白转录因子1(Snail1)信号通路的影响。方法选取40只大鼠,10只作为空白组,其余30只建立糖尿病肾脏病大鼠模型,共有29只大鼠建模成功,将其分为模型组9只、二甲双胍组10只、... 详细信息

目的分析紫苏叶提取物对糖尿病肾脏病大鼠肾纤维化及Notch/锌指蛋白转录因子1(Snail1)信号通路的影响。方法选取40只大鼠,10只作为空白组,其余30只建立糖尿病肾脏病大鼠模型,共有29只大鼠建模成功,将其分为模型组9只、二甲双胍组10只、紫苏叶提取物组10只。二甲双胍组给予二甲双胍,紫苏叶提取物组给予紫苏叶提取物,空白组、模型组不做处理,干预14 d后观察大鼠变化。结果与空白组相比,模型组、二甲双胍组、紫苏叶提取物组血糖、尿素氮(BUN)、肌酐(Scr)、丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、Ⅳ型胶原(Ⅳ-C)、Ⅲ型前胶原(PCⅢ)、透明质酸(HA)、层黏连蛋白(LN)水平、Notch、Snail1 mRNA表达量及相对表达量上升(P均0.05)。结论糖尿病肾脏病大鼠经紫苏叶提取物干预后肾纤维化减轻,Notch/Snail1信号通路受抑。

关键词：紫苏叶提取物链脲佐菌素糖尿病肾脏病肾纤维化 Notch/锌指蛋白转录因子1

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GDF11生物学功能的研究进展

中国医药科学 2024年第8期14卷 49-52页

作者：敬媛媛胥勋梅张栋珉田博文四川省绵阳市第三人民医院、四川省精神卫生中心四川绵阳621000

生长分化因子11(GDF11)是转化生长因子-β超家族的成员之一,近年因其在调节各种组织器官的发育和分化中的多种功能而备受关注。GDF11具有广泛的生物学效应,包括在临床应用中逆转衰老、逆转与年龄相关的病理变化和调节损伤后器官再生的... 详细信息

生长分化因子11(GDF11)是转化生长因子-β超家族的成员之一,近年因其在调节各种组织器官的发育和分化中的多种功能而备受关注。GDF11具有广泛的生物学效应,包括在临床应用中逆转衰老、逆转与年龄相关的病理变化和调节损伤后器官再生的能力等,如逆转年龄相关的心肌肥厚、改善衰老骨骼肌代谢、促进神经血管再生、减少肝脏脂肪变性。但是也有研究报道GDF11对心脏、骨骼肌、肝脏等并不存在有益作用。目前的研究显示GDF11在各个器官系统中的生物学功能存在争议。本文回顾近年来GDF11在各个系统及疾病中的作用,旨在对当前相关研究进行总结归纳,为以GDF11为靶点相关疾病的防治及预后提供理论依据。

关键词： GDF11 生物学功能心脏骨骼肌大脑肝脏

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An Isolable Phosphinogermylyne as a Synthon of One-Coordinate GeⅠRadical

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Chinese Journal of Chemistry 2024年第7期42卷 736-742页

作者： dongmin Wang Haonan Chen Yuhao He Xiaodan Chen Li zhang Gengwen Tan Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education Guangdong Basic Research Center of Excellence for Functional Molecular EngineeringSchool of ChemistryIGCMESun Yat-Sen UniversityGuangzhouGuangdong 510275China School of Electronic Engineering Guangxi Universityof Science and TechnologyLiuzhouGuangxi 545000China College of Chemistry and Material Jinan UniversityGuangzhouGuangdong 510632China Innovation Center for Chemical Science College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123China Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Hangzhou Normal UniversityHangzhouZhejiang 311121China

Reduction of chlorogermylene MsFluindtBu-GeCl 1 with potassium graphite(KC8)afforded putative germylyne radical MsFluindtBu-Ge 2 as confirmed by electron paramagnetic resonance(EPR)spectroscopy.However,it slowly decayed via C—H bond activation at the fluorenyl moiety to yield a bis(germylene)3 at room temperature.By using a Lewis base to stabilize the unoccupied p orbital at the GeⅠradical center,acyclic two-coordinate GeⅠradicals MsFluindtBu-Ge(IMe4)4(IMe4=1,3,4,5-tetramethyl-imidazolin-2-ylidene),MsFluindtBu-Ge(IiPr)5(IiPr=1,3-diisopropyl-4,5-dimethyl-imidazolin-2-ylidene),MsFluindtBu-Ge(PMe3)6 were isolated in crystalline forms.The unpaired electron in 4-6 mainly resides at the Ge 4p orbital as revealed by EPR spectroscopic studies and theoretical calculations.Interestingly,facile ligand exchange of PMe3 in 6 with IMe4 and IiPr was observed to afford 4 and 5,respectively.Moreover,phosphinogermylyne 6 reacted with PhEEPh(E=S,Se),4-tetrabutylphenylacetylene(Ar'CCH),[CpMo(CO)3]2 and nBu3SnH to furnish germylenes MsFluindtBu-GeEPh(E=S 7,Se 8),MsFluindtBu-GeCH=CHAr'9,a germylyne complex MsFluindtBu-Ge≡Mo(CO)2Cp 10 and a Ge(Ⅳ)compound MsFluindtBu-GeH2SnnBu311,respectively.The reactivity studies demonstrate that 6 can act as a synthon of one-coordinate germylyne radical attributing to labile coordination of trimethylphosphine.

关键词： Phosphinogermylyne Germanium Radicals Donor-acceptor systems Radical reactions

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牙髓再生组织工程中的细胞共培养体系

中国组织工程研究 2023年第15期27卷 2379-2384页

作者：张楚晗张东敏徐稳安南方医科大学深圳口腔医院(坪山) 广东省深圳市510811 南方医科大学口腔医学院广东省广州市510515

背景:常规根管治疗去除所有牙髓组织会导致牙的生理功能和组织再生能力丧失,体外培养牙髓干细胞并使之形成牙髓样组织,再移植入髓腔内成为了理想的牙髓再生治疗方法。目的:汇总阐述通过共培养体系诱导牙髓干细胞形成牙髓样组织的研究进... 详细信息

背景:常规根管治疗去除所有牙髓组织会导致牙的生理功能和组织再生能力丧失,体外培养牙髓干细胞并使之形成牙髓样组织,再移植入髓腔内成为了理想的牙髓再生治疗方法。目的:汇总阐述通过共培养体系诱导牙髓干细胞形成牙髓样组织的研究进展,为牙髓组织再生的干细胞治疗方法提供思路。方法:第一作者于PubMed、中国知网和万方数据库检索时限为2022年5月以前发表的相关文献。英文检索词为“dental pulp regeneration,dental pulp stem cell,co-culture,tissue engineering,signaling pathway”,中文检索词为“牙髓再生、牙髓干细胞、共培养、组织工程、支架、信号通路”,纳入67篇符合标准的文献进行总结阐述。结果与结论:①共培养体系由细胞主体和组合细胞通过不同的组合方式构成。②现阶段共培养体系组合方式可分为直接共培养与间接共培养2种,生物支架材料的介入、培养条件的改变等作用又可将共培养结局分为二维和三维再生组织。③直接共培养通过细胞间接触构建生理性的细胞外基质以及利于干细胞增殖分化的微环境。④间接共培养解决了组合细胞来源不足、不同个体间免疫排异反应等问题,组合细胞产生的生物因子更易制成临床使用的药物和生物支架材料。⑤目前共培养体系在成血管有优越表现,但其他结构相关报道较少,且共培养结局形成的再生组织仍具有不确定性。同时,由于牙体解剖结构、排异反应等限制因素,将共培养体系生成的再生组织运用于临床仍然困难。

关键词：牙髓再生组织再生牙髓干细胞细胞共培养共培养体系条件培养基生物支架组织工程

The effect of nanohybrid materials on the pour-point and viscosity depressing of waxy crude oil

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Chinese Science Bulletin 2011年第1期56卷 14-17页

作者： WANG Feng zhang dongmin DING YanFen zhang LiXin YANG MingShu JIANG BaoLiang zhang ShiMin AI MuYang LIU GuangWen ZHI ShuJie HUO LianFeng OUYANG Xin LI Li Key Laboratory of Engineering Plastics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China PetroChina Pipeline R & D Center Langfang 065000 China

The pipeline transportation of waxy crude oil is a problem both at home and abroad.In this paper,a novel nanohybrid pour-point depressant (PPD) was used to decrease the pour point and viscosity of waxy crude oil.The pour point and apparent viscosity of waxy crude oil was decreased significantly upon addition of the nanohybrid PPD,and the long-term stability of the nanohybrid PPD was superior to that of a conventional ethylene-vinyl acetate copolymer PPD.Polarized optical microscopy and X-ray diffraction were used to study the effect of the nanohybrid PPD on the crystallization of crude oil.Addition of the nanohybrid PPD reduced the amount of wax crystals,prevented their aggregation,and reduced the temperature at which the crude oil started to crystallize.The significant effect of this nanohybrid PPD on the pour point and viscosity depressing of crude oil is of great importance for facilitating the safe,efficient and energy-minimized transportation of waxy crude oil.

关键词：纳米杂化含蜡原油原油粘度低凝点原油降凝剂乙烯醋酸乙烯酯材料管道运输

葛根芩连汤调控SIRT1/PGC1α/Nrf1信号通路改善追赶生长大鼠糖脂代谢紊乱

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中国实验方剂学杂志 2024年第1期30卷 77-86页

作者：丁纪茹张欢刘东敏张效科成都中医药大学附属医院成都610075 陕西中医药大学陕西咸阳712046

目的:探讨葛根芩连汤对高脂饮食诱导追赶生长(CUG)大鼠糖脂代谢的影响及机制。方法:60只SD大鼠随机分为正常组(18只)和追赶生长模型组(42只),采用限制饮食后开放高脂饮食的方式建立追赶生长大鼠模型,观察大鼠一般状况、体质量的变化,分... 详细信息

目的:探讨葛根芩连汤对高脂饮食诱导追赶生长(CUG)大鼠糖脂代谢的影响及机制。方法:60只SD大鼠随机分为正常组(18只)和追赶生长模型组(42只),采用限制饮食后开放高脂饮食的方式建立追赶生长大鼠模型,观察大鼠一般状况、体质量的变化,分别于第4周、第8周末各组抽取6只大鼠检测空腹血糖(FBG)、空腹血清胰岛素(FINS)、甘油三脂(TG)、总胆固醇(TC)水平,并计算胰岛素抵抗指数(HOMA-IR),评估CUG大鼠胰岛素敏感性及体成分的改变。造模成功后,分别给予葛根芩连汤和吡格列酮干预6周,实验分为6组:正常组、模型组、葛根芩连汤低、中、高剂量组(2.5、5、10 g·kg^(-1))、吡格列酮组(3.125 mg·kg^(-1)),正常组和模型组给予等量生理盐水灌胃。实验过程中,记录大鼠体质量的变化,于实验结束时检测FBG、FINS、TG、TC水平,计算HOMA-IR指数;苏木素-伊红(HE)染色观察大鼠骨骼肌组织病理学改变;严格按照试剂盒所示方法检测骨骼肌活性氧(ROS)、丙二醛(MDA)水平;实时荧光定量聚合酶链式反应(Real-time PCR)检测骨骼肌沉默信息调节因子1(SIRT1)、过氧化物酶体增殖物激活受体γ共激活剂1α(PGC1α)、核因子E_2相关因子1(Nrf1)m RNA的表达;免疫组化法及蛋白免疫印迹法(Western blot)检测骨骼肌SIRT1、PGC1α、Nrf1蛋白的表达。结果:与正常组比较,模型组大鼠FBG有所升高,FINS、HOMA-IR显著升高(P<0.01);血清TG、TC水平明显升高(P<0.05,P<0.01);大鼠骨骼肌组织肌纤维直径显著增加,肌细胞间的脂肪细胞明显增加;骨骼肌ROS、MDA水平显著升高(P<0.01);SIRT1、PGC1α、Nrf1 m RNA及蛋白表达明显下降(P<0.05,P<0.01)。与模型组比较,葛根芩连汤各剂量组及吡格列酮组大鼠的体质量、FINS、HOMA-IR、TG水平显著降低(P<0.05,P<0.01),以葛根芩连汤中、高剂量组和吡格列酮组变化最明显;骨骼肌肌间脂肪等间质成分明显减少,肌纤维直径变窄;骨骼肌ROS、MDA水平明显降低(P<0.05,P<0.01);SIRT1、PGC1α、Nrf1 m RNA及蛋白表达均有不同程度升高(P<0.05,P<0.01)。结论:葛根芩连汤可以改善CUG大鼠糖脂代谢紊乱,改善IR,其机制可能与调控SIRT1/PGC1α/Nrf1信号通路有关。

关键词：葛根芩连汤追赶生长胰岛素抵抗糖脂代谢沉默信息调节因子1(SIRT1)/过氧化物酶体增殖物激活受体γ共激活剂-1α(PGC1α)/核因子E_(2)相关因子1(Nrf1)信号通路