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Stimulating Start-up Investment Through Government-Sponsored Venture Capital: Theory and Chinese Evidence

Journal of Systems Science & Complexity 2024年

作者： NI Xuanming ZHENG tiantian GAO Feng zhao Huimin School of Economics and Management Tsinghua University School of Software and Microelectronics Peking University School of Business Sun Yat-sen University

Government-sponsored venture capital(GVC) has been used to support financially constrained start-ups as an important policy tool in China. Typically, to motivate the social capital to invest in start-ups, GVC provides subsidies for them to bridge the funding gap in the early-stage venture capital market. However, the effect and mechanism of GVC affecting social capital investment have not been clearly studied. In this paper, the authors not only develop a game model to analyze this issue in theory, but conduct an empirical study by analyzing the 14741 records matched by propensity score matching(PSM) of Chinese venture capital market data from 2011 to 2021. The proposed findings are as the follows. Firstly, the subsidies offered by GVC will simultaneously increase the returns and risks of investments in start-ups of social capital with more volatile incentive effect of GVC. The incentive effect of GVC is only effective when the returns resulting from the subsidies outweigh the risks they introduce. In the context of the Chinese venture capital market, the incentive effect of GVC is effective. Secondly, the incentive effect of GVC is more pronounced in high-tech industries, which can be attributed to the signaling effect facilitated by GVC. In this context, the subsidy mainly helps social capital to bear the costs associated with screening potential investments. Thirdly, the incentive effect of GVC is more significant in underdeveloped venture capital markets, which can be explained by the “virtuous cycle” effect, in which GVC plays a pioneering role in establishing a more robust early-stage market trading system. By examining these three points, this study contributes to a better understanding of how GVC can effectively guide social capital investment, especially in the Chinese landscape.

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Surface/Interface Engineering of Hierarchical MoO_(2)/MoNi_(4)@Ru/RuO_(2)Heterogeneous Nanosheet Arrays for Alkaline Water Electrolysis with Fast Kinetics

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Chinese Journal of Chemistry 2024年第2期42卷 119-128页

作者： Qiong Zhang Ruixue Zhang Yingxiu zhao tiantian Sun Jianyang Gao Guang-Rui Xu Zexing Wu Yu Yang Lei Wang Key Laboratory of Eco-chemical Engineering Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life ScienceTaishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and TechnologyCollege of Chemistry and Molecular EngineeringSchool of Materials Science and EngineeringQingdao University of Science and TechnologyQingdaoShandong 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdaoShandong 266042China

Realizing the hydrogen economy by water electrolysis is an attractive approach for hydrogen production,while the efficient and stable bifunctional catalysts under high current densities are the bottleneck that limits the half-cell reactions of water splitting.Here,we propose an approach of hydrothermal and thermal annealing methods for robust MoO_(2)/MoNi_(4)@Ru/RuO_(2) heterogeneous cuboid array electrocatalyst with multiplying surface-active sites by depositing a monolayer amount of Ru.Benefiting from abundant MoO_(2)/MoNi_(4)@Ru/RuO_(2)heterointerfaces,MoO_(2)/MoNi_(4)@Ru/RuO_(2) heterogeneous cuboid array electrocatalysts effectively drive the alkaline water splitting with superior hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)performances.The synthesized MoO_(2)/MoNi_(4)@Ru/RuO_(2) has high HER activity,which realizes the working overpotentials of 48 mV at 50 mA·cm^(-2),further achieving overpotentials of 230 mv for industry-level 1000 mA·cm^(-2) in alkaline water electrolysis.Moreover,it also showed an enhanced OER activity than commercial RuO_(2) with a small overpotential of 280 mV at 200 mA·cm^(-2) in alkaline media.When building an electrolyzer with electrodes of(-)MoO_(2)/MoNi_(4)@Ru/RuO_(2)IIMo02/MoNig@Ru/RuO_(2)(+),a cell voltage of 1.63 V and 1.75 V is just required to support the current density of 200 mA·cm^(-2) and 500 mA-cm^(-2) in alkaline water electrolysis,much lower than that of the electrolyzer of(-)Pt/CIIRuO_(2)(+).This work demonstrates that MoO_(2)/MoNig@Ru/RuO_(2) heterogeneous nanosheet arrays are promising candidates for industrial water electrolysis applications,providing a possibility for the exploration of water electrolysis with a large currentdensity.

关键词： Hierarchical heterostructure Surface engineering Bifunctional catalysts Hydrogen evolution reaction Oxygen evolution reaction Watersplitting Catalytic activity Electrocatalysis Heterogeneous catalysis

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Glutathione-depleted cyclodextrin pseudo-polyrotaxane nanoparticles for anti-inflammatory oxaliplatin(Ⅳ) prodrug delivery and enhanced colorectal cancer therapy

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Chinese Chemical Letters 2024年第4期35卷 280-286页

作者： Wenjia Wang Xingyue He Xiaojie Wang tiantian zhao Osamu Muraoka Genzoh Tanabe Weijia Xie Tianjiao Zhou Lei Xing Qingri Jin Hulin Jiang State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 210009China Faculty of Pharmacy Kinki University HigashiosakaOsaka 577-8502Japan State Key Laboratory of Natural Medicines(SKLNM)and Department of Medicinal Chemistry School of PharmacyChina Pharmaceutical UniversityNanjing 210009China School of Pharmacy Hangzhou Medical CollegeHangzhou 311399China College of Pharmacy Yanbian UniversityYanji 133002China

Oxaliplatin(Oxa) is the first-line chemotherapeutic drug for the treatment of colorectal cancer(CRC). However, long-term Oxa chemotherapy can induce inflammation and increase the levels of cyclooxygenase-2(COX-2) and prostaglandin E2(PGE2), which can promote tumor metastasis. Moreover,high glutathione(GSH) levels in CRC cells significantly reduce Oxa sensitivity and seriously restrict the clinical application of Oxa. Herein, an Oxa(Ⅳ) prodrug with anti-inflammatory properties(desmethyl naproxe, DN) and GSH-depleting cyclodextrin pseudo-polyrotaxane carriers were prepared and further self-assembled into micellar nanoparticles(designated DNPt@PPRI). The relesae of DN from DNPt@PPRI can reduce the level of PGE2 to inhibit inflammation and tumor metastasis by decreasing COX-2 protein,and also synergize with Oxa to inhibit tumor. More importantly, GSH depletion can reduce the detoxification of Oxa and further enhance chemotherapy-induced apoptosis. DNPt@PPRI have a good GSH depletion ability to enhance the sensitivity of Oxa, indicating a potential in the synergistic chemotherapy and chemo-sensitization of colorectal cancer.

关键词： Oxaliplatin Glutathione depletion Tetravalent platinum prodrug Synergistic therapy Colorectal cancer

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High performance wide bandgap perovskite solar cell with low V_(OC) deficit less than 0.4 V

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Journal of Energy Chemistry 2024年第4期91卷 313-322页

作者： Haikuo Guo Fuhua Hou Xuli Ning Xiaoqi Ren Haoran Yang Rui Liu tiantian Li Chengjun Zhu Ying zhao Wei Li Xiaodan Zhang School of Physical Science and Technology Key Laboratory of Semiconductor Photovoltaic Technology and Energy Materials at Universities of Inner Mongolia Autonomous RegionInner Mongolia UniversityHohhot 010021Inner MongoliaChina Institute of Photoelectronic Thin Film Devices and Technology of Nankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of TianjinSolar Energy Research Center of Nankai UniversityTianjin 300350China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430000HubeiChina

Wide bandgap perovskite solar cells(PSCs)have attracted significant attention because they can be applied to the top cells of tandem solar cells.However,high open-circuit voltage(V_(OC))deficit(>0.4 V)result from poor crystallization and high non-radiative recombination losses become a serious limitation in the pursuit of high performance.Here,the relevance between different Pbl_(2)proportions and performance parameters are revealed through analysis of surface morphology,residual stress,and photostability.The increase of Pbl_(2)proportion promotes crystal growth and reduces the work function of the perovskite film surface and promotes the energy level alignment with the carrier transport layer,which decreased the V_(OC)deficit.However,residual PbI_(2)exacerbated the stress level of perovskite film,and the resulting lattice disorder deteriorated the photostability of the device.Ultimately,after the synergistic passivation of residual PbI_(2)and PEAI,the V_(OC)achieves 1.266 V and V_(OC)deficit is less than 0.4 V,the record value in wide bandgap PSCs.

关键词： Pb management Perovskite solar cell Strain Wide bandgap Stability

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Sea cucumber derived sulfated sterols alter glucose metabolism by promoting gluconeogenesis and reducing glycogenesis in healthy mice

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Food Science and Human Wellness 2024年

作者： Shanyun Yu Teng Wang Yingcai zhao Xiaoyue Li Changhu Xue Yuming Wang tiantian Zhang SKL of Marine Food Processing & Safety Control College of Food Science and Engineering Ocean University of China Sanya Institute of Oceanography Ocean University of China

Sea cucumber derived sulfated sterols (SS) significantly ameliorated insulin resistance and decreased lipid accumulation compared to plant sterols. Interestingly， our recent study found that intervention with sea cucumber sulfated sterols could significantly increase blood glucose levels of healthy mice in the presence of glucose， while cholesterol sulfate， as one of sulfated sterols， did not have the same effect. However， the exact mechanism of SS on glucose metabolism is still unknown. In the present study， we investigated the potential mechanism by which SS influenced blood glucose homeostasis in healthy mice. Results showed that intervention with sea cucumber sulfated sterols did not affect the levels of hormones related to glucose metabolism， while led to a significant decrease in the synthesis of liver glycogen and muscle glycogen. Besides， the expression of proteins associated with the promotion of gluconeogenesis dramatically increased in the mice intervened with sea cucumber sulfated sterols. These findings suggested that sea cucumber sulfated sterols might change blood glucose metabolism in healthy mice by reducing glycogenesis and promoting gluconeogenesis.

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J-family genes redundantly regulate flowering time and increase yield in soybean

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The Crop Journal 2024年第3期12卷 944-949页

作者： Haiyang Li Zheng Chen Fan Wang Hongli Xiang Shuangrong Liu Chuanjie Gou Chao Fang Liyu Chen tiantian Bu Fanjiang Kong Xiaohui zhao Baohui Liu Xiaoya Lin Guangdong Key Laboratory of Plant Adaptation and Molecular Design/Guangzhou Key Laboratory of Crop Gene Editing/Innovative Center of Molecular Genetics and Evolution School of Life SciencesGuangzhou UniversityGuangzhou 510006GuangdongChina

Soybean(Glycine max)is a short-day crop whose flowering time is regulated by photoperiod.The longjuvenile trait extends its vegetative phase and increases yield under short-day conditions.Natural variation in J,the major locus controlling this trait,modulates flowering time.We report that the three J-family genes influence soybean flowering time,with the triple mutant Guangzhou Mammoth-2 flowering late under short days by inhibiting transcription of E1-family genes.J-family genes offer promising allelic combinations for breeding.

关键词： Soybean Flowering time Yield J-family genes

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荆州市学龄前儿童体质量指数与家庭状况及喂养条件的相关性研究

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中国儿童保健杂志 2024年第4期32卷 451-455页

作者：王甜甜赵冰荆州市妇幼保健院儿童保健科湖北荆州434000 荆州市疾病预防控制中心免疫预防科

目的分析荆州市学龄前儿童体质量指数(BMI)分布情况及与家庭状况、喂养条件的相关性,为儿童超重和肥胖的健康管理提供科学依据。方法2022年8月采取分层整群随机抽样法,在荆州市展开横断面研究,通过收集3~6岁幼儿园在读儿童身高、体重、... 详细信息

目的分析荆州市学龄前儿童体质量指数(BMI)分布情况及与家庭状况、喂养条件的相关性,为儿童超重和肥胖的健康管理提供科学依据。方法2022年8月采取分层整群随机抽样法,在荆州市展开横断面研究,通过收集3~6岁幼儿园在读儿童身高、体重、家庭状况及喂养条件等相关数据,计算BMI,并采用多元线性回归分析方法进行数据分析。结果本次研究共调查了14237名学龄前儿童,BMI的总体均数为(16.40±3.40)kg/m^(2),其中有0.05%的儿童BMI处于下级,1.95%处于中下级,86.49%处于中级,4.83%处于中上级,6.67%处于上级。多元线性回归分析显示,出生方式(剖宫产)(β=0.17)、父亲吸烟(β=0.13)、母亲吸烟(β=0.39)、性别(女)(β=-0.22)、家庭税前总收入(万元)(β=-0.13)、儿童目前所在学校的性质(民办/私立)(β=0.22),以炸鸡、汉堡、薯条、碳酸饮品、果汁为主的膳食模式(β=0.46)与儿童BMI呈线性相关(P<0.05)。结论荆州市学龄前儿童超重和肥胖的问题普遍存在,其中超重和肥胖的比例较高,家长和社会应该共同努力,采取相应措施保证儿童健康成长。

关键词：学龄前儿童体质量指数家庭状况喂养条件

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可及性与包容性:无障碍博物馆的理论溯源、国际经验与国内实践

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中国博物馆 2024年第2期 121-130页

作者：赵甜甜安徽博物院合肥230071

无障碍博物馆发端于20世纪六七十年代兴起于欧美社会的社会包容运动,并在联合国“包容性教育”倡议影响下,逐渐由强调建筑环境与设施的无障碍设计转向对包容性和可及性的重点关注。以英美博物馆为主导的无障碍博物馆建设,在政府或行业... 详细信息

无障碍博物馆发端于20世纪六七十年代兴起于欧美社会的社会包容运动,并在联合国“包容性教育”倡议影响下,逐渐由强调建筑环境与设施的无障碍设计转向对包容性和可及性的重点关注。以英美博物馆为主导的无障碍博物馆建设,在政府或行业指导下以“可及”为前提,强调博物馆作为“平等、多元、包容”社区中心的未来愿景,由此衍生出国际多样化实践,以其先锋性和创新性为全球博物馆无障碍实践提供有益参考。

关键词：博物馆无障碍博物馆可及性包容性国际经验国内实践

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外泌体参与脓毒症发生发展及临床诊治方面的研究进展

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中华危重病急救医学 2024年第2期36卷 221-224页

作者：赵奕琳刘田恬王春霞上海市儿童医院、上海交通大学医学院附属儿童医院重症医学科上海200062 上海交通大学医学院儿童感染免疫与重症医学研究院危重症转化医学研究室上海200062

脓毒症是宿主对感染的免疫反应失调而导致的危及生命的器官功能障碍。脓毒症发生发展中伴随多种细胞分泌外泌体,囊括非编码核糖核酸(RNA)、代谢小分子和蛋白质等,在免疫炎症反应、氧化应激、凝血功能障碍等方面扮演重要角色。新型检测... 详细信息

脓毒症是宿主对感染的免疫反应失调而导致的危及生命的器官功能障碍。脓毒症发生发展中伴随多种细胞分泌外泌体,囊括非编码核糖核酸(RNA)、代谢小分子和蛋白质等,在免疫炎症反应、氧化应激、凝血功能障碍等方面扮演重要角色。新型检测技术的飞速发展促进了外泌体在脓毒症早期预警、危重度分层及治疗效果和预后评估中的应用。本文从外泌体新型检测技术、参与脓毒症病理进展及其在脓毒症早期诊断、病情评估及治疗方面最新进展进行综述,以期为脓毒症诊疗提供新思路。

关键词：脓毒症外泌体新型检测技术病理机制临床应用

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基于COMSOL的纸浆模塑干燥模拟及验证

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包装工程 2024年第1期45卷 223-228页

作者：赵甜甜王军江南大学机械工程学院江苏无锡214122 江南大学江苏省食品先进制造装备技术重点试验室江苏无锡214122

目的研究采用COMSOL Multiphysics模拟纸浆模塑干燥效率及厚度变化的可行性。方法基于多孔介质理论,应用有限元仿真软件COMSOL Multiphysics建立纸浆模塑干基含水率随时间变化的热湿、水分流动、非等温流动多物理场耦合模型,考虑干燥中... 详细信息

目的研究采用COMSOL Multiphysics模拟纸浆模塑干燥效率及厚度变化的可行性。方法基于多孔介质理论,应用有限元仿真软件COMSOL Multiphysics建立纸浆模塑干基含水率随时间变化的热湿、水分流动、非等温流动多物理场耦合模型,考虑干燥中含湿多孔介质的湿空气热对流及多孔基体的热传导,模拟在热板加热条件下纸浆模塑的干燥效率和厚度的变化,并与实验结果进行比较。结果模型内域探针所得模拟结果与实验结果具有良好的一致性,在干燥后期厚度预测误差范围为0.4%~7.7%,干燥效率预测差异值最低为4.3%。结论采用COMSOL Multiphysics模拟纸浆模塑干燥过程可行。

关键词：纸浆模塑多孔介质干燥数值模拟多物理场耦合

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