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Journal of Energy Chemistry 2024年第10期97卷 470-477页

作者： xiaoman Ye xuemei xiao Zhijing Wu Xin Wu Lin Gu Sheng Liu School of Chemical Engineering and Technology Sun Yat-sen University The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province Sun Yat-sen University

The notorious growth of zinc dendrite and the water-induced corrosion of zinc metal anodes（ZMAs）restrict the practical development of aqueous zinc ion batteries（AZIBs）.In this work,a zinc metallized,imide-pillared covalent organic framework（ZPC） protective film has been engineered as a stable Zn2+ion-conducting interphase to modulate interfacial kinetics and suppress side reactions for *** to bare Zn,ZPC@Zn exhibits a higher Zn2+ionic conductivity,a larger Zn2+transference number,a lower electronic conductivity,a smaller desolvation activation energy and correspondingly a significant suppression of corrosion,hydrogen evolution and Zn ***,the ZPC@Zn||ZPC@Zn symmetric cell obtains a cycling lifespan over 3000 h under 5 mA cm-2for 1 mA h *** ZPC@Zn||NH4V4O10coin-type full battery delivers a specific capacity of 195.8 mA h g-1with a retention rate of78.5% at 2 A g-1after 1100 cycles,and the ZPC@Zn||NH4V4O10pouch full cell shows a retention of70.1% in reversible capacity at 3 A g-1after 1100 *** present incorporation of imide-linked covalent organic frameworks in the surface modification of ZMAs will offer fresh perspectives in the search for ideal protective films for the practicality of AZIBs.

关键词： Aqueous zinc ion batteries Covalent organic frameworks Imide linkage Surface modification Zinc metal anodes

相对收入与夫妻主观幸福感——基于CFPS2020数据的实证研究

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特区经济 2024年第6期 80-84页

作者：肖雪媚华东政法大学商学院上海201620

随着经济发展和社会进步,女性的劳动市场参与率逐渐提高,妻子收入高于丈夫的现象不断出现。本文基于CFPS2020家庭微观数据,实证分析了妻子相对收入对夫妻双方主观幸福感的影响。研究发现:一是妻子相对收入增加会降低夫妻整体主观幸福感... 详细信息

随着经济发展和社会进步,女性的劳动市场参与率逐渐提高,妻子收入高于丈夫的现象不断出现。本文基于CFPS2020家庭微观数据,实证分析了妻子相对收入对夫妻双方主观幸福感的影响。研究发现:一是妻子相对收入增加会降低夫妻整体主观幸福感,对丈夫主观幸福感有显著的负向影响,但对妻子主观幸福感影响不显著。二是通过异质性分析发现,在高学历、高年龄、低家庭收入样本中相对收入对主观幸福感有显著的负向影响,但在低学历、低年龄、高家庭收入样本中并不显著。据此提出应削弱传统性别身份认同规范,从而弱化妻子相对收入提高对夫妻幸福感的负面作用。

关键词：相对收入主观幸福感性别身份认同

电感耦合等离子体质谱快速测定水泥中二氧化硅

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山西化工 2024年第4期44卷 102-103,110页

作者：朱建发傅晓燕肖雪梅中铁二院成都工程检测有限责任公司四川成都610000

采用氢氧化钠作溶剂对水泥样品进行消解提取水泥中的二氧化硅,使用HMI模式内标校正法,采用电感耦合等离子体质谱(ICP-MS)快速测定水泥中二氧化硅含量。在选定的实验参数下,硅标准曲线范围在0~40 mg/L,相关系数为0.9999,同时测试两种水... 详细信息

采用氢氧化钠作溶剂对水泥样品进行消解提取水泥中的二氧化硅,使用HMI模式内标校正法,采用电感耦合等离子体质谱(ICP-MS)快速测定水泥中二氧化硅含量。在选定的实验参数下,硅标准曲线范围在0~40 mg/L,相关系数为0.9999,同时测试两种水泥国家标准物质并进行加标回收实验,测试结果均在标准认定值范围内,重复性限在0.08%~0.12%,加标回收率在95.84%~99.12%,准确度和精密度良好。该方法分析步骤简便,能够快速准确地测定出水泥中二氧化硅含量,为水泥产品中二氧化硅含量的检测提供了研究基础。

关键词：电感耦合等离子体质谱水泥二氧化硅

Dry-regulated hydrogels with anisotropic mechanical performance and ionic conductivity

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Chinese Chemical Letters 2022年第2期33卷 871-876页

作者： Ping Li Yi Liu Ziang Wang xuemei xiao Guozhe Meng xiaolin Wang Hong-Lei Guo Hui Guo School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Pharmacy and State Key Laboratory of Quality Research in Chinese Medicine Macao University of Science and TechnologyMacaoChina

Nature consists of various soft tissues with well-ordered hierarchical anisotropic structures, which play essential roles in biological systems to exhibit particular functions. Mimicking bio-tissues, synthetic hydrogels with anisotropic structures have received considerable attention in recent years. However, existing approaches to fabricate anisotropic hydrogels often require complicated procedures, which are timeconsuming and labor-demanding. Inspired by the dry-induced crystallization phenomenon, we report a simple yet effective prestretching-drying-swelling method to afford anisotropic crystalline polyvinyl alcohol hydrogels. Owing to the distinct anisotropic microstructure, the hydrogels demonstrate excellent mechanical properties with noticeable directional distinction. It is revealed that both the enhancing of pre-orientation strain and the extending of heating time make the hydrogels with better mechanical properties and more remarkable anisotropicity. Owing to the anisotropically aligned structure, the hydrogels exhibit remarkably differential ionic conductivity: the difference between the parallel and vertical conductivity of the same sample can reach as high as 6.6 times, making the materials possible candidates as nano-conductive materials. We anticipate that this simple yet effective approach may become highly useful for fabricating oriented hydrogels and endow the materials with more promising application prospects in the future.

关键词： Crystalline hydrogels Anisotropicity Dry process Mechanical performance Differential conductivity

Probiotic-derived exopolysaccharide protects against Staphylococcus aureus bloodstream infection in mice

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Food Science and Human Wellness 2024年

作者： Shouxin Sheng Pu Wang Ying Xu Yanchen Liang Chunhe Li xuemei Bao Haochi Zhang xiao Wang State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock， School of Life Science， Inner Mongolia University

Staphylococcus aureus (S. aureus) infection is a global public health problem， searching and developing green alternatives for antibiotics are urgently required. In this study， the exopolysaccharides (EPS) produced by Lactobacillus helveticus WXD191 were extracted and purified. Structure analysis suggested that the EPS contained Ara， Man， Gal， GalN， Glc， GlcN， and GlcA， and possessed a molecular of 84.2 kDa. Methylation combined with NMR spectroscopy analysis revealed that the backbone of EPS was →3)-β-D-Galp-(1→3)-β-D-GlcpNAc-(1→4)-β-D-GlcpA-(1→3- Man-1→2-Man-1→2，6-Man-1→2，6-Man-1→. Congo red analysis and CD spectrum indicated the existence of α-helices. Crystalline characteristics， scanning electron microscopy， and thermogravimetric analysis revealed that EPS formed thermally stable amorphous with a small amount of microcrystalline structure and a rough and porous surface. Meanwhile， The S. aureus bloodstream infection model was used to evaluate the protection efficiency for systemic infection induced by S. aureus and found that the EPS could enhance survival as well as reduce bacterial burden and proinflammatory chemokines. Collectively， these results suggest that EPS isolated from Lactobacillus helveticus was a competitive candidate for defense against S. aureus infection.

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

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Science China Life Sciences 2024年

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 Biology Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of Science and Technology Austria (ISTA) National Key Laboratory of Wheat Improvement College of Life Sciences Shandong Agricultural University Centre of Excellence for Plant and Microbial Science (CEPAMS) JIC-CAS

Winter plants rely on vernalization, a crucial process for adapting to cold conditions and ensuring successful reproduction. However,understanding the role of histone modifications in guiding the vernalization process in winter wheat remains limited. In this study, we investigated the transcriptome and chromatin dynamics in the shoot apex throughout the life cycle of winter wheat in the field. Two core histone modifications, H3K27me3 and H3K36me3, exhibited opposite patterns on the key vernalization gene VERNALIZATION1(VRN1),correlating with its induction during cold exposure. Moreover, the H3K36me3 level remained high at VRN1 after cold exposure, which may maintain its active state. Mutations 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 time. Intriguingly, VRN1 lost its high expression after the cold exposure memory in the absence of H3K36me3. During 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 wheat. The 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 wheat. Integrating gene expression with H3K27me3 and H3K36me3 patterns identified potential regulators of flowering. This study unveils distinct roles of H3K27me3 and H3K36me3 in controlling vernalization response, maintenance, and resetting in winter wheat.

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城市轨道交通路网连通可靠度评估模型

中国铁道科学 2016年第1期37卷 132-137页

作者：肖雪梅贾利民厦门理工学院机械与汽车工程学院福建厦门361024 北京交通大学轨道交通控制与安全国家重点实验室北京100044

将城市轨道交通路网抽象为由若干车站、上下行区间及其运输能力、OD对路径及其客流量和权重等构成的动态有向加权路网模型,用以表达路网中乘客出行行为、列车运行图和客流的关系;在此基础上,通过分析OD对有效路径、区间和路径的剩余运... 详细信息

将城市轨道交通路网抽象为由若干车站、上下行区间及其运输能力、OD对路径及其客流量和权重等构成的动态有向加权路网模型,用以表达路网中乘客出行行为、列车运行图和客流的关系;在此基础上,通过分析OD对有效路径、区间和路径的剩余运输能力,以满足乘客出行为目标,建立城市轨道交通路网连通可靠度评估模型。以北京城市轨道交通为例,运用该模型进行城市轨道交通路网连通可靠度评估的实证分析。结果表明:在城市轨道交通路网中,虽然部分车站在物理上有线路连通,但由于受乘客出行行为、列车运行图和客流等的影响,在有些时间段这些车站在运输功能上不是连通的,从而使得路网的整体连通可靠度降低。

关键词：城市轨道交通路网连通可靠度列车运行图乘客行为客流

植物提取物抑制反刍动物瘤胃甲烷排放研究进展

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动物营养学报 2024年第5期36卷 2752-2760页

作者：肖莉刘子豪南雪梅熊本海黑龙江八一农垦大学动物科技学院大庆163319 中国农业科学院北京畜牧兽医研究所动物营养学国家重点实验室北京100193

植物及其次生代谢产物含有多种生物活性物质,具有多能效性,可作为天然饲草资源或饲料添加剂,用于反刍动物营养补充及疾病防治。自2019年“禁抗”目标提出以来,植物提取物成为替代抗生素的首要研究对象,发挥着不可或缺的重要作用。此外,... 详细信息

植物及其次生代谢产物含有多种生物活性物质,具有多能效性,可作为天然饲草资源或饲料添加剂,用于反刍动物营养补充及疾病防治。自2019年“禁抗”目标提出以来,植物提取物成为替代抗生素的首要研究对象,发挥着不可或缺的重要作用。此外,由于近年来温室效应愈演愈烈,给人类社会带来了巨大的危害,而多种植物提取物凭借其调节瘤胃菌群、有效抑制产甲烷菌群丰度的特性引起重视。植物提取物具有来源广、无污染、低毒性等特点,使其成为一类极具潜力的绿色、天然甲烷抑制剂。本文就植物提取物抑制甲烷排放的研究进展进行了综述总结,为实现甲烷减排提供理论参考和实践指导。

关键词：植物提取物反刍动物甲烷产甲烷菌活性物质瘤胃发酵

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不同类型叶面肥对日光温室越冬番茄风味品质的影响

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农业工程学报 2023年第10期39卷 218-226页

作者：肖雪梅高程斐武玥唐中祺钟源张丹魏晋梅郁继华甘肃农业大学园艺学院兰州730070 省部共建干旱生境作物学国家重点实验室兰州730070

为解决日光温室冬季低温弱光导致的番茄品质下降问题,该研究以“184”番茄为试材,采用高效液相色谱法、顶空固相微萃取法与气相色谱-质谱联用(gas chromatography-mass spectrometry,GC-MS)等技术,研究5种不同类型叶面肥对番茄果实糖酸... 详细信息

为解决日光温室冬季低温弱光导致的番茄品质下降问题,该研究以“184”番茄为试材,采用高效液相色谱法、顶空固相微萃取法与气相色谱-质谱联用(gas chromatography-mass spectrometry,GC-MS)等技术,研究5种不同类型叶面肥对番茄果实糖酸组分及挥发性物质种类和含量的影响。结果表明:喷施硒元素液体肥显著提高了白熟期、成熟期和完熟期番茄果实蔗糖和葡萄糖的含量(P<0.05),硅元素液体肥显著增加了白熟期、转色期和成熟期番茄果实蔗糖的含量,氨基酸液体肥显著提高了这三个时期番茄葡萄糖含量(P<0.05)。喷施硒元素液体肥和鱼蛋白水溶肥显著降低了成熟期番茄α-酮戊二酸、柠檬酸和苹果酸含量(P<0.05)。硒元素液体肥显著提高了白熟期和转色期番茄糖酸比,分别较CK增加了15.32%和12.15%(P<0.05)。GC-MS结果显示,各处理成熟期番茄果实共检测到71种挥发性物质,包括20种醛类、9种酮类、17种醇类、5种酯类、10种烃类和10种其他类物质。各处理中醛类含量最多,酯类含量最少。5种叶面肥均可提高醛类含量,其中硅元素液体肥处理较对照显著增加21.89%(P<0.05)。所有被检测出的挥发性物质包含了9种特征香气成分,主要分为花香、果香和青香3种类型,硒元素液体肥、硅元素液体肥和海藻精水溶肥处理分别较对照显著提高番茄的特征香气成分总含量7.93%、17.68%和8.33%(P<0.05)。综上,叶面喷施硒元素和硅元素液体肥可提高番茄果实糖组分,增加挥发性醛类物质和特征香气成分,对番茄风味品质提升效果显著,可在日光温室越冬番茄生产中推广应用。研究结果为设施番茄高品质栽培提供了数据支撑和实践参考。

关键词：日光温室番茄叶面肥可溶性糖组分有机酸组分挥发性物质

缺铁胁迫下葡萄试管苗对外源褪黑素的生长和生理响应

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果树学报 2023年第2期40卷 300-308页

作者：陈玉鹏陈文绪孙泽东肖雪梅吴玉霞甘肃农业大学园艺学院兰州730070

【目的】探究在轻度缺铁胁迫下,外源褪黑素(MT)对葡萄试管苗的生长和生理影响及对缺铁症状的缓解作用。【方法】以克瑞森无核葡萄试管苗为试验材料,试验设置4个不同的处理组,分别为:CK,CK+MT(MT浓度为140μmol·L^(-1)),-Fe(Fe浓度为30... 详细信息

【目的】探究在轻度缺铁胁迫下,外源褪黑素(MT)对葡萄试管苗的生长和生理影响及对缺铁症状的缓解作用。【方法】以克瑞森无核葡萄试管苗为试验材料,试验设置4个不同的处理组,分别为:CK,CK+MT(MT浓度为140μmol·L^(-1)),-Fe(Fe浓度为30μmol·L^(-1))和-Fe+MT,分别研究MT对CK和-Fe葡萄试管苗的生长生理响应。【结果】在缺铁胁迫下,葡萄试管苗的株高、茎粗、干鲜质量、光合色素含量、根系活力、过氧化物酶(POD)活性和硝酸还原酶(NR)活性不同程度下降;而膜脂过氧化产物丙二醛(MDA)含量、渗透调节物质脯氨酸(Pro)含量、可溶性糖(SS)含量、可溶性蛋白(SP)含量和超氧化物歧化酶(SOD)活性提高;加入MT后,植株生长形态指标、光合色素含量、根系活力、POD活性和NR活性有所上升,渗透调节物质(Pro、SS、SP)含量,膜脂过氧化产物MDA含量和SOD活性快速下降,葡萄试管苗上的缺铁症状有所缓解。【结论】在轻度缺铁胁迫下,140μmol·L^(-1)外源褪黑素处理可以有效缓解葡萄试管苗的缺铁症状,保护植株在生理方面免受伤害,保证植株的正常生长发育。

关键词：葡萄试管苗缺铁胁迫褪黑素生理响应