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Chinese Physics B 2022年第4期31卷 574-582页

作者： Wenyang Zhao Li-Chun Xu Yuhong Guo Zhi Yang ruiping liu Xiuyan Li College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan 030024China

Lithium-sulfur batteries have attracted attention because of their high energy ***,the "shuttle effect" caused by the dissolving of polysulfide in the electrolyte has greatly hindered the widespread commercial use of lithiumsulfur *** this paper,a novel two-dimensional TiS2/graphene heterostructure is theoretically designed as the anchoring material for lithium-sulfur batteries to suppress the shuttle *** heterostructure formed by the stacking of graphene and TiS2 monolayer is the van der Waals type,which retains the intrinsic metallic electronic structure of graphene and TiS2 *** improves the electronic conductivity of the sulfur cathode,and the transferred electrons from graphene enhance the polarity of the TiS2 *** of the polysulfide adsorption show that the TiS2/graphene hetero structure can maintain good metallic properties and the appropriate adsorption energies of 0.98-3.72 eV,which can effectively anchor *** transfer analysis suggests that further enhancement of polarity is beneficial to reduce the high proportion of van der Waals(vdW) force in the adsorption energy,thereby further enhancing the anchoring *** Li2 S decomposition barrier and Li-ion migration barrier imply that the heterostructure has the ability to catalyze fast electrochemical kinetic ***,TiS2/graphene heterostructure could be an important candidate for ideal anchoring materials of lithium-sulfur batteries.

关键词： lithium-sulfur batteries TiS_(2)/graphene heterostructure anchoring material shuttle effect

MOF-derived Co_(9)S_(8) nano-flower cluster array modified separator towards superior lithium sulfur battery

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Chinese Chemical Letters 2021年第3期32卷 1157-1160页

作者： Qi Wang Hanqing Zhao Boya Li Chenhui Yang Mingyang Li Yanan Li Peng Han Miaomiao Wu Tengyu Li ruiping liu Department of Materials Science and Engineering China University of Mining&Technology(Beijing)Beijing 100083China

Lithium sulfur batteries with high energy density are thought to be the most potential energy storage technology that can be ***,the shuttle effect of polysulfides deteriorates its electrochemical ***,a novel Co_(9)S_(8)nanostructure derived from metal organic framework material(MOF)was explored by simple liquid phase reaction and heat vulcanization of2-methylimidazole and Co(NO_(3))_(2)·6 H_(2)O on the surface of the original PP *** Co_(9)S_(8)nano-flower cluster array wall was vertically and closely arranged with the thickness of 200 nm,and the polysulfide can be adsorbed by its physical and chemical action to slow down the"shuttle effect".It is found that the cell with the modified separator can achieve an ideal discharge capacity of about 600 mAh/g at 1 *** specific capacity is maintained at 500 mAh/g after 200 cycles,with only 0.11%of capacity decay per *** provides a new way for the utilization of MOF material derivatives to modify the separator in order to improve the electrochemical performance of lithium-sulfur batteries.

关键词： Lithium-sulfur battery Co_(9)S_(8) MOF Separator Electrochemical performance

Preparation of tanshinone Ⅱ_(A) self-soluble microneedles and its inhibition on proliferation of human skin fibroblasts

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Chinese Herbal Medicines 2023年第2期15卷 251-262页

作者： Yanshan Zhan Xiaoqi Xu Xi Luo ruiping liu Yujian Lin Ping Zhao Jun Shi School of Chinese Material Medica Guangdong Pharmaceutical University of ChinaGuangzhou 510006China Department of Chemistry and Chemical Engineering Guangdong Pharmaceutical University of ChinaZhongshan 528458China Engineering&Technology Research of Topical Precise Drug Delivery System Guangzhou Higher Education Mega CenterGuangzhou 510006China

Objective:Hypertrophic scars(HS)are a variety of skin tissue fibrosis disease that occurs in human skin,the effective therapeutic method of which is still inaccessible up to *** a bioactive constituent of a well-known medical plant,Salvia miltiorrhiza(Danshen in Chinese),tanshinone Ⅱ_(A)(TSA)is reported to inhibit cell proliferation in ***,the aim of this study was to prepare TSA self-soluble microneedles to strengthen its dermal retention and break through the difficulty of significantly thickening epidermal connective tissue and stratum corneum at the HS *** possible mechanism of action in suppressing HS was studied using human skin fibroblasts(HSF).Methods:Tanshinone Ⅱ_(A) self-dissolving microneedles(TSA-MN)was prepared using a negative mold casting *** prescription process of microneedle was optimized by Box-Behnken effect surface *** media were selected to investigate the ability of transdermal absorption and in vitro ***,according to Cell Counting Kit-8(CCK8)method as well as the Western blot method,the effect of TSA-MN on the biological characteristics of HSF was ***:With remarkable slow release effect and dermal retention,the release and transdermal properties of TSA-MN in vitro were better than both TSA and ordinary dosage *** effect of HSF confirmed the essential decrease in cell motility during cell proliferation and cell migration in vitro,which plays a significant role in down-regulating the secretion of transforming growth factor-β1(TGF-β1)in HSF and increasing the expression level of ***:The prepared TSA self-soluble microneedles is helpful in solving the problem of hypertrophic scars,with a stable dermal retention effect after process optimization.

关键词： human skin fibroblasts hypertrophic scar tanshinoneⅡ_(A) tanshinoneⅡ_(A)self-dissolving microneedles TGF-β1

Advanced noble-metal-free bifunctional electrocatalysts for metal-air batteries

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Journal of Materiomics 2022年第2期8卷 454-474页

作者： Wenhao Tang Boya Li Kewei Teng Xiaodong Wang ruiping liu Mengwei Wu Lei Zhang Pengfei Ren Junqing Zhang Ming Feng Department of Materials Science and Engineering China University of Mining&Technology(Beijing)Beijing100083China Department of Mechanical Engineering University of Alaska FairbanksPO Box 755905FairbanksAK99775-5905United States Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun130103China

The sluggish reaction kinetics at the oxygen cathode is one of the important issues hindering the commercialization of the metal-air *** the noble metal can be used as the high-efficiency electrocatalyst to solve the problems to some extent,the high cost and scarcity of these noble-metal catalysts have limited their application in *** this review,we discussed the mecha-nisms of the ORR and OER,and proposed the principles for the bifunctional electrocatalysts firstly,and then the state-of-the-art bifunctional catalysts,including carbon-based materials and transition-metal-based *** the basis of that,the self-supporting 3D noble-metal-free bifunctional ORR/OER catalysts were also ***,the perspectives for the bifunctional electrocatalysts were discussed.

关键词： Bifunctional electrocatalyst Noble-metal free Carbon Transition metal Metal-air battery

华南地区国人成人腹腔干分型变异的临床应用研究

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中国临床解剖学杂志 2024年第3期42卷 259-264页

作者：赖文华毛隆昆王诗雨李奕宣刘瑞平徐达政李明哲周丽华中山大学医学院广东深圳518107 中山大学中山医学院广州510275 中山大学附属第七医院消化医学中心广东深圳518406

目的研究成人腹腔干的分型及其解剖变异特点,为临床手术提供参考依据。方法对44具经防腐处理的尸体进行了腹腔干解剖。观察腹腔干各分支的走形,根据Panagouli分型法以及其起源椎体水平对其进行进一步量化和描述。结果成人腹腔干标本存在... 详细信息

目的研究成人腹腔干的分型及其解剖变异特点,为临床手术提供参考依据。方法对44具经防腐处理的尸体进行了腹腔干解剖。观察腹腔干各分支的走形,根据Panagouli分型法以及其起源椎体水平对其进行进一步量化和描述。结果成人腹腔干标本存在5种分型:83%(36例)拥有典型的腹腔干解剖结构(分型Ⅰ),18%(8例)有解剖变异,其中11%(5例)为分型Ⅲ,2%(1例)为分型Ⅳ,2%(1例)为分型Ⅴ,2%(1例)为分型Ⅸ。结论成人腹腔干变异较多,术前需结合影像学做好充分评估,避免损伤。

关键词：腹腔干腹腔血管解剖研究

基于LA-ICP-MS表面原位分析技术测定热电离质谱仪灯丝支架上铀的沉积分布

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世界核地质科学 2024年第2期41卷 376-385页

作者：熊超郭冬发李伯平汤书婷刘桂方刘瑞萍王娅楠乔麓伊核工业北京地质研究院北京100029

热电离质谱法(Thermal ionization mass spectrometry,简称TIMS)是一种测量同位素丰度比的经典分析方法,在地质学和核工业领域得到广泛应用。热电离质谱法测铀同位素丰度比时一般采用三带结构,由于铀的第一电离能较高,需要较高的电离温... 详细信息

热电离质谱法(Thermal ionization mass spectrometry,简称TIMS)是一种测量同位素丰度比的经典分析方法,在地质学和核工业领域得到广泛应用。热电离质谱法测铀同位素丰度比时一般采用三带结构,由于铀的第一电离能较高,需要较高的电离温度,长时间测试蒸发出铀化合物或电离出的铀离子在灯丝支架上沉积,影响灯丝支架上悬浮高压与源电压间的绝缘电阻,降低两者之间的电压差,导致绝大部分离子因动能不足无法进入离子透镜,最终影响离子流的稳定性,引起测试时信号产生波动。针对热电离质谱仪灯丝支架铀沉积导致的灯丝支架绝缘失效问题,采用激光剥蚀电感耦合等离子体质谱法(Laser ablation inductively coupled plasma mass spectrometry,简称LA-ICP-MS)对灯丝支架铀沉积分布进行了分析,取得以下结果:建立了LA-ICP-MS原位表面分析技术,其最佳激光频率为10 Hz,能量密度为6 J·cm-2,束斑直径为60μm。校准曲线相关系数R2=0.9992,表明建立的方法线性关系良好。应用建立的方法,测定了灯丝支架表面铀沉积的分布特征。结果显示:灯丝支架表面铀沉积随着灯丝支架使用时间的增加,对应的绝缘电阻变小;并沿着支架向两端延伸,铀沉积量逐渐降低。铀沉积主要集中在电离带灯丝支架中心上端,且蒸发带上铀沉积量明显低于电离带。同时绝缘挡片可以有效降低陶瓷绝缘体上铀的沉积,因此可以通过增大绝缘挡片来提高灯丝支架的绝缘效果。

关键词：热电离质谱仪灯丝支架铀沉积 LA-ICP-MS

Carbon-based flexible self-supporting cathode for lithium-sulfur batteries:Progress and perspective

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Carbon Energy 2021年第2期3卷 271-302页

作者： Qinghuiqiang Xiao Jinlin Yang Xiaodong Wang Yirui Deng Peng Han Ning Yuan Lei Zhang Ming Feng Chang‐an Wang ruiping liu Department of Materials Science and Engineering China University of Mining and Technology(Beijing)BeijingChina School of Materials Science and Engineering Tsinghua UniversityBeijingChina Department of Mechanical Engineering University of Alaska FairbanksFairbanksAlaskaUSA Department of Applied Physics Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchunChina

The flexible self-supporting electrode can maintain good mechanical and electrical properties while retaining high specific capacity,which meets the requirements of flexible ***-sulfur batteries(LSBs),as a new generation of energy storage system,hold much higher theoretical energy density than traditional batteries,and they have attracted extensive attention from both the academic and industrial *** of a proper substrate material is important for the flexible self-supporting *** materials,with the advantages of light weight,high conductivity,strong structural plasticity,and low cost,provide the electrode with a large loading space for the active material and a conductive *** makes the carbon materials meet the mechanical and electrochemical requirements of flexible *** this paper,the commonly used fabrication methods and recent research progresses of the flexible self-supporting cathode with a carbon material as the substrate are *** sulfur loading methods are summarized,which provides useful information for the structural design of the *** the first review article of the carbon-based flexible self-supporting LSB cathodes,it provides valuable guidance for the researchers working in the field of LSB.

关键词： carbon flexible lithium sulfur batteries self-supporting

Effect of Different Calcium Levels on Growth,Yield and Fruit Quality of Tomatoes in Substrate Culture

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Agricultural Science & Technology 2015年第8期16卷 1704-1708页

作者： Jing FENG ruiping liu Hongyi LUO College of Resources and Environment Shandong Agricultural University

Tomato seedlings were grown in substrate culture with pots. The formulation of Holland Greenhouse Horticulture Research Institute was used(as CK) and the effects of different Ca concentrations(LCa, CK and HCa)on growth, yield, and fruit quality(protein, Vitamin C, nitrates, organic acid and soluble sugar) of tomato were studied keeping concentrations of other nutrients unchanged in the nutrient solution. The results showed that parameters related to the growth of tomato(plant height and Stem diameter), changes of tomato yield per plant and quality of tomato fruits were the highest when the plants were grown at 20% Ca treatments. In the second study, increased EC concentrations of nutrient solution resulted in stronger plants with improved yields and quality. Four different concentration gradients of nutrient solution treatment were designed based on the results of the first research stage(EC=1.5, 2.5, 3.5, 4.5 m S/cm, respectively). The single tomato plant had the highest production which is 2 268.994 g/plant, when the nutrient solution strength was at EC=1.5 m S cm, whereas they have the best fruit quality when the solution strength at EC 4.5 m S/cm. This suggests the need for wide popularization of the nutrient solution formula in large areas to improve the tomato production.

关键词： Calcium Substrate culture Nutrient solution Tomato

利用橙汁渣生产甲基硒代半胱氨酸饲料添加剂的研究

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中国饲料 2024年第8期 112-115页

作者：丁武亿刘瑞平郭晓波林小翠胡艳连海郭婧方圆钟全洪黄美峰曾庆祥赣州畜牧水产研究所江西赣州341000 赣州市畜牧业发展和动物疫病防控中心江西赣州341000

文章旨在以橙汁渣为基础底物,添加适量的小麦粉和菌种活化物,探索复合菌发酵对亚硒酸钠转化有机硒(甲基硒代半胱氨酸)的影响,试验共分6组,每组6个重复,对照组为1.0%亚硒酸钠+小麦粉组;5个试验组用57%橙汁渣代替小麦粉,并分别添加0.2%、0... 详细信息

文章旨在以橙汁渣为基础底物,添加适量的小麦粉和菌种活化物,探索复合菌发酵对亚硒酸钠转化有机硒(甲基硒代半胱氨酸)的影响,试验共分6组,每组6个重复,对照组为1.0%亚硒酸钠+小麦粉组;5个试验组用57%橙汁渣代替小麦粉,并分别添加0.2%、0.6%、0.8%、1.0%、1.2%亚硒酸钠。各组添加1%的复合菌与橙汁渣、小麦粉等底物混合后,在37℃恒温发酵96?h,测定其有机硒(甲基硒代半胱氨酸)转化率。结果表明,在本试验条件下,与对照组相比,试验组添加57%橙汁渣为基础底物进行复合菌发酵对亚硒酸钠转化为有机硒(甲基硒代半胱氨酸)的转化率显著提高(P <0.05),有机硒转化率超99%,甲基硒代半胱氨酸转化率超72%,其中处理5组甲基硒代半胱氨酸转化率最高,为93.4%。结论 :本研究为以甲基硒代半胱氨酸为主的有机硒饲料添加剂的开发提供思路,充分实现农副产品资源化利用,为满足动物生理需要和生产富硒保健食品提供优质硒源。

关键词：有机硒橙汁渣甲基硒代半胱氨酸

Enhanced superelasticity of Cu-Al-Ni shape memory alloys with strong orientation prepared by horizontal continuous casting

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Frontiers of Materials Science 2022年第4期16卷 105-112页

作者： Mengwei WU Yu XIAO Zhuofan HU ruiping liu Chunmei MA Department of Materials Science and Engineering China University of Mining&Technology(Beijing)Beijing 100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China

The preparation of large-scale Cu-Al-Ni shape memory alloys with excellent microstructure and texture is a significant challenge in this *** this study,large-scale Cu-Al-Ni shape memory alloy(SMA)slabs with good surface quality and strong orientation were prepared by the horizontal continuous casting(HCC).The microstructure and mechanical properties were compared with the ordinary casting(OC)Cu-Al-Ni *** results showed that the microstructure of OC Cu-Al-Ni alloy was equiaxed grains with randomly orientation,which had no obvious *** alloys producedby Hcchad herringbone grains withstrong orientation near(100)and the cumulative tensile superelasticity of 4.58%.The superelasticity of the alloy produced by HCC has been improved by 4-5 *** work has preliminarily realized the production of large-scale Cu-Al-Ni SMA slab with good superelasticity,which lays a foundation forexpanding the industrial production and application of Cu-based SMAs.

关键词： shape memory alloy Cu-Al-Ni orientation superelasticity