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超声波辅助提取沙棘有机酸及其成分分析

食品工业 2024年第5期45卷 105-111页

作者：麻玉雯马贺王树林青海大学农牧学院西宁810016 不详

通过超声波辅助提取沙棘有机酸,探究超声时间、料液比、超声功率及乙醇体积分数对提取沙棘有机酸得率影响,用响应面优化得到最佳提取条件;采用高效液相色谱法测定超声波辅助提取液中有机酸种类及含量的差异。结果表明:超声波辅助提取的... 详细信息

通过超声波辅助提取沙棘有机酸,探究超声时间、料液比、超声功率及乙醇体积分数对提取沙棘有机酸得率影响,用响应面优化得到最佳提取条件;采用高效液相色谱法测定超声波辅助提取液中有机酸种类及含量的差异。结果表明:超声波辅助提取的最佳条件为超声时间30 min、料液比1∶15 (g/mL)、超声功率640 W、乙醇体积分数75%,此条件下沙棘总有机酸得率为37.66 mg/g;采用高效液相色谱(high-performance liquid chromatography,HPLC)测定提取液中主要有机酸含量,共检测出6种有机酸,分别是草酸、酒石酸、苹果酸、抗坏血酸、乳酸、柠檬酸,其中酒石酸含量最高(14.45 mg/g),其次为苹果酸(13.11 mg/g)。该研究为沙棘资源高效利用及相关产品开发提供了理论基础。

关键词：沙棘超声提取有机酸响应面高效液相色谱(HPLC)

Synthesis, Structure and Photophysical Properties of Silole-Oxadiazole Copolymers

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Chinese Journal of Chemistry 2013年第6期31卷 779-786页

作者： Tingting Zhang Chaoqiang Zhu yuwen ma Chengyun Wang Yongjia Shen Key Laboratory for Advanced materials and Institute of Fine Chemicals East China University of Science and Technology 130 Meilong Road Shanghai 200237 China

A new conjugated copolymer （PTST-DyOXD） derived from 1,1-dimethyl-3,4-diphenyl-2,5-bis（5-bromo-2- thienyl）-silole （TST） and 2,5-bis（4-ethynylphenyl）-l,3,4-oxadiazole （DyOXD） was synthesized by Pd（0）-catalyzed Sonogashira coupling reaction. For comparison, another copolymer without acetenyl group （PTST-OXD） was also synthesized by Pd（0）-catalyzed Suzuki coupling reaction. Chemical structures and optoelectronic properties of the copolymers were characterized by IH NMR, 13C NMR, IR, UV-vis absorption, photoluminescence and cyclic voltammetry. The number-average molecular weight （Mn） is 4010 Da for PTST-DyOXD and 3890 Da for PTST-OXD, respectively. The thermogravimetric analysis （TGA） measurements show that they have good thermal stability with decomposition temperature at 312 and 318 ~C, respectively. The optical band gap is 2.21 eV for PTST-DyOXD and 2.10 eV for PTST-OXD based on the absorption onset. CV analysis revealed the LUMO level of PTST-DyOXD is -3.04 eV, lower than that of PTST-OXD （about -2.89 eV）, which is attributed to the introduction of acetylene group in PTST-DyOXD, increasing the system of the conjugate chain length.

关键词： 2,5-bis(5-bromo-2-thienyl)silole 2,5-bis(4-ethynylphenyl)-1,3,4-oxadiazole Sonogashira reaction Suzuki reaction conjugated polymer

Ethynylene-Linked Oligomers Based on Benzodithiophene:Synthesis and Photoelectric Properties

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Chinese Journal of Chemistry 2014年第4期32卷 298-306页

作者： Songyang Jiang yuwen ma Yingyi Wang Chengyun Wang Yongjia Shen Key Laboratory for Advanced materials and Institute of Fine Chemicals East China University of Science and TechnologyShanghai 200237China

Two conjugated ethynyl-linked oligomers,oligo(benzodithiophene-ethynylene-benzothiadiazole)(O1)and oligo(benzodithiophene-ethynylene-carbazole)(O2),were synthesized by Sonogashira coupling *** de-grees of polymerization were 7 and 10,*** photophysical and electrochemical properties were in-vestigated.O1 exhibitd two strong absorption bands at 404 nm and 483 nm,and O2 at 401 nm and 429 *** re-sults of UV-Vis,cyclic voltammetry(CV)and theoretical calculations showed that O1 has a narrower band gap than *** conductivities of O1 and O2 were 1.05×10^(−15) and 6.98×10^(−16) S/cm,respectively,and would increase to 1.23×10^(−10) and 1.05×10^(−10) S/cm after doping with iodine.

关键词： benzodithiophene conjugated polymer Sonogashira reaction photoelectric property conductivity

蓖麻油体蛋白基因家族鉴定和盐碱胁迫响应分析

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种子 2024年第8期43卷 103-111页

作者：何汉琼姜洪进张文婧马钰雯孟子轩李月明邓晓霞蔺吉祥山西农业大学资源环境学院太原030031 东北林业大学园林学院哈尔滨150040

本研究以蓖麻为对象,利用生物信息学手段对蓖麻Oleosin基因家族进行全面鉴定分析,得到5个Oleosin基因家族成员,序列长度在138~232 aa之间;分子量在14.48493~25.42461 kDa之间;等电点介于9.07~10.96之间;均为疏水性蛋白且具有高度保守的... 详细信息

本研究以蓖麻为对象,利用生物信息学手段对蓖麻Oleosin基因家族进行全面鉴定分析,得到5个Oleosin基因家族成员,序列长度在138~232 aa之间;分子量在14.48493~25.42461 kDa之间;等电点介于9.07~10.96之间;均为疏水性蛋白且具有高度保守的“脯氨酸结”;α-螺旋和无规则卷曲是蓖麻Oleosin蛋白的主要组成结构;基序分析显示,Motif1~Motif4存在所有蓖麻Oleosin蛋白中。编码这些蛋白的5个Oleosin基因分布于4条染色体上,在进化关系上被划分到U-Oleosin、SL-Oleosin和SH-Oleosin三个亚族;基因结构分析显示,除RcOleosin2有一个内含子外,其余RcOleosin基因均无内含子;5个基因启动子区域均存在多种与逆境响应相关的顺式作用元件;共线性分析显示,基因组多倍化不是蓖麻Oleosin基因家族扩张的主要原因;盐碱胁迫下的蓖麻种子转录组数据表明,5个Oleosin基因均在盐碱胁迫过程中有一定的调节功能。

关键词：蓖麻油体蛋白基因家族生物信息学

Designing metal sulfide-based cathodes and separators for suppressing polysulfide shuttling in lithium-sulfur batteries

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Nano Research 2024年第4期17卷 2574-2591页

作者： Guoyin Zhu Qingzhu Wu Xianghua Zhang yuwen Bao Xuan Zhang Zhuoyao Shi Yizhou Zhang Lianbo ma Institute of Advanced materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044China School of materials Science and Engineering Anhui University of TechnologyMaanshan 243002China School of Mechanical Engineering Jiangsu University of TechnologyChangzhou 213001China

Lithium-sulfur(Li-S)batteries,known for their high energy density,are attracting extensive research interest as a promising next-generation energy storage ***,their widespread use has been hampered by certain issues,including the dissolution and migration of polysulfides,along with sluggish redox *** sulfides present a promising solution to these obstacles regarding their high electrical conductivity,strong chemical adsorption with polysulfides,and remarkable electrocatalytic capabilities for polysulfide *** this review,the recent progress on the utilization of metal sulfide for suppressing polysulfide shuttling in Li-S batteries is systematically summarized,with a special focus on sulfur hosts and functional *** critical roles of metal sulfides in realizing high-performing Li-S batteries have been comprehensively discussed by correlating the materials’structure and electrochemical ***,the remaining issues/challenges and future perspectives are *** offering a detailed understanding of the crucial roles of metal sulfides,this review dedicates to contributing valuable knowledge for the pursuit of high-efficiency Li-S batteries based on metal sulfides.

关键词： lithium-sulfur batteries metal sulfides polysulfide shuttling sulfur hosts separator coating layers

寄生虫感染相关嗜酸粒细胞增多相关性肺疾病的临床特征分析

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国际呼吸杂志 2024年第2期44卷 184-191页

作者：袁丁马宇雯戴妹薛玲娜欧昌星廖永康张清玲呼吸疾病全国重点实验室/国家呼吸系统疾病临床医学研究中心/国家呼吸医学中心呼吸与危重症医学科广州呼吸健康研究院/广州医科大学附属第一医院/广州医科大学广州510120

目的分析寄生虫感染相关嗜酸粒细胞增多相关性肺疾病(EPD)的临床特征。方法横断面研究,采用目的抽样法收集2021年5月至2022年12月在广州医科大学附属第一医院诊断为寄生虫感染EPD患者25例的资料,根据国家寄生虫病卫生行业标准将其分为... 详细信息

目的分析寄生虫感染相关嗜酸粒细胞增多相关性肺疾病(EPD)的临床特征。方法横断面研究,采用目的抽样法收集2021年5月至2022年12月在广州医科大学附属第一医院诊断为寄生虫感染EPD患者25例的资料,根据国家寄生虫病卫生行业标准将其分为临床诊断组17例和确诊组8例,比较2组患者的流行病学史、人口学特征、临床表现及相关检查指标,随访患者驱虫治疗的效果。结果临床诊断组外周血嗜酸性粒细胞(EOS)显著高于确诊组,EOS重度升高的患者比例也更高(P=0.026)。2组患者肺影像学主要改变为磨玻璃样、结节样、间质增厚。2组患者接受驱虫治疗后症状均好转,17例患者驱虫治疗后复查血EOS较治疗前下降(Z=3.20,P=0.006),其中的8例患者在治疗后第1个月即可看到血EOS的显著下降(Z=2.52,P=0.012)。结论寄生虫感染相关EPD可以表现为外周血EOS重度升高,其病原学检出率不高,流行病学史的采集对于疾病诊断十分重要。对于有寄生虫病流行病学史、寄生虫抗体阳性、无肺外器官受累的EPD患者,诊断性驱虫治疗可以提高预后。

关键词：肺疾病,寄生虫性嗜酸性粒细胞增多诊断性治疗流行病学

Liquid Metal Grid Patterned Thin Film Devices Toward Absorption‑Dominant and Strain‑Tunable Electromagnetic Interference Shielding

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Nano-Micro Letters 2024年第11期16卷 541-553页

作者： yuwen Wei Priyanuj Bhuyan Suk Jin Kwon Sihyun Kim Yejin Bae Mukesh Singh Duy Thanh Tran Minjeong Ha Kwang‑Un Jeong Xing ma Byeongjin Park Sungjune Park Department of Polymer‑Nano Science and Technology Department of Nano Convergence EngineeringJeonbuk National UniversityJeonju 54896Republic of Korea School of Chemical Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Composites Research Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea School of materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea School of materials Science and Engineering and Sauvage Laboratory for Smart MaterialsHarbin Institute of Technology(Shenzhen)ShenzhenGuangdong 518055People’s Republic of China

The demand of high-performance thin-film-shaped deformable electromagnetic interference(EMI)shielding devices is increasing for the next generation of wearable and miniaturized soft *** highly reflective conductive materials can effectively shield EMI,they prevent deformation of the devices owing to rigidity and generate secondary electromagnetic pollution ***,soft and stretchable EMI shielding thin film devices with absorption-dominant EMI shielding behavior is *** devices consist of liquid metal(LM)layer and LM grid-patterned layer separated by a thin elastomeric film,fabricated by leveraging superior adhesion of aerosol-deposited LM on *** devices demonstrate high electromagnetic shielding effectiveness(SE)(SE_(T) of up to 75 dB)with low reflectance(SER of 1.5 dB at the resonant frequency)owing to EMI absorption induced by multiple internal reflection generated in the LM grid ***,the excellent stretchability of the LM-based devices facilitates tunable EMI shielding abilities through grid space adjustment upon strain(resonant frequency shift from 81.3 to 71.3 GHz@33%strain)and is also capable of retaining shielding effectiveness even after multiple strain *** newly explored device presents an advanced paradigm for powerful EMI shielding performance for next-generation smart electronics.

关键词： Absorption-dominant electromagnetic interference shielding Liquid metals Soft and stretchable electronics Thin film devices Tunable electromagnetic interference shielding

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循环经济的二次资源金属回收

矿冶工程 2014年第2期34卷 68-72页

作者：马荣骏马玉雯长沙矿冶研究院有限责任公司湖南长沙410012 美国路易斯维尔大学美国肯塔基州40202

简述了循环经济的内涵。阐明了二次资源回收金属在循环经济中的重要意义及作用,并介绍了二次资源回收金属的原则工艺,提出了二次资源回收金属的发展方向。

关键词：循环经济二次资源城市矿山金属回收

Bioorthogonal microglia-inspired mesenchymal stem cell bioengineering system creates livable niches for enhancing ischemic stroke recovery via the hormesis

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1412-1427页

作者： Jianpei Xu Yinzhe Sun Yang You yuwen Zhang Dan Huang Songlei Zhou Yipu Liu Shiqiang Tong Fenfen ma Qingxiang Song Chengxiang Dai Suke Li Jigang Lei Zhihua Wang Xiaoling Gao Jun Chen Shanghai Pudong Hospital&Department of Pharmaceutics School of PharmacyFudan UniversityShanghai 201203China Key Laboratory of Smart Drug Delivery Ministry of EducationSchool of PharmacyFudan UniversityShanghai 201203China Department of Pharmacology and Chemical Biology State Key Laboratory of Oncogenes and Related GenesShanghai Universities Collaborative Innovation Center for Translational MedicineShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Emergency Shanghai Pudong HospitalFudan University Pudong Medical CenterShanghai 201399China Institute of Science and Technology for Brain-Inspired Intelligence&Department of Neurology Fudan UniversityShanghai 201203China Department of Rehabilitation Medicine Huashan HospitalFudan UniversityShanghai 201203China Daxing Research Institute University of Science and Technology BeijingBiomedical Industry BaseZhongguancun Science and Technology ParkBeijing 102600China Cellular Biomedicine Group Inc. Shanghai 201210China

Mesenchymal stem cells(MSCs)experience substantial viability issues in the stroke infarct region,limiting their therapeutic efficacy and clinical *** levels of deadly reactive oxygen radicals(ROS)and proinflammatory cytokines(PC)in the infarct milieu kill transplanted MSCs,whereas low levels of beneficial ROS and PC stimulate and improve engrafted MSCs’*** on the intrinsic hormesis effects in cellular biology,we built a microglia-inspired MSC bioengineering system to transform detrimental high-level ROS and PC into vitality enhancers for strengthening MSC *** system is achieved by bioorthogonally arming metabolic glycoengineered MSCs with microglial membrane-coated nanoparticles and an antioxidative extracellular protective *** this system,extracellular ROSscavenging and PC-absorbing layers effectively buffer the deleterious effects and establish a microlivable niche at the level of a single MSC for ***,the infarct’s inanimate milieu is transformed at the tissue level into a new living niche to facilitate *** engineered MSCs achieved viability five times higher than natural MSCs at seven days after transplantation and exhibited a superior therapeutic effect for stroke recovery up to 28 *** vitality-augmented system demonstrates the potential to accelerate the clinical translation of MSC treatment and boost stroke recovery.

关键词： Ischemic stroke Mesenchymal stem cell Cell engineering Hormesis effect Bioorthogonal chemistry Microglia Reactive oxygen spices Proinflammatory cytokines