菱角壳的化学成分和药理活性研究进展

近年来对菱角壳的研究主要分为化学成分和药理活性研究两个方面,其中化学成分方面的研究可以概括为生物碱、酚酸类、萜类和甾体、多糖类、黄酮类5个方面;药理活性方面的研究可以概括为抗癌活性、抗氧化活性、降低α-葡萄糖苷酶活性、保肝护肝活性、抗菌活性5个方面。目前在化学成分方面的研究较弱,从研究结果来看,没食子酸及其衍生物是菱角壳的主要药用成分。最后就菱角壳的开发利用提出了几点建议。     

高技术服务业与资源型产业融合对资源型企业两阶段创新效率的影响

基于新技术与新知识的高技术服务业跨界融合是传统企业实现创新资源优化配置、创新研发和商业转化的重要因素。因此，运用熵指数测度全国各省区高技术服务业与资源型产业融合水平，并利用2014—2017年资源型上市公司面板数据检验两大产业融合对资源型企业两阶段创新效率的影响，同时探讨企业吸收能力的调节作用。结果表明：现阶段高技术服务业和资源型产业融合程度不高，但发展态势良好，处于从失调走向协调的转变期；产业融合对资源型企业创新研发效率短期无显著影响，长期存在抑制作用，资源型企业技术能力刚性导致对新技术的排斥，且较大的产业间认知差距削弱了产业间良性互动带来的技术扩散效应；产业融合对创新转化效率呈先抑制、后促进效应，就长期而言，产业融合具有良好的创新转化推动力；资源型企业吸收能力分别在产业融合与滞后一期创新研发效率及滞后三期创新转化效率的关系中起正向、负向调节作用，表明资源型企业吸收能力构建尚不全面。     

转译社会学视野中的传统习俗与环境治理--以闽南春节“禁炮”行动为例

闽南春节燃放鞭炮的传统习俗由来已久,近年来城市社区面临环境污染问题,为解决突出的环境问题,在环境治理的时代背景下,政府出台了禁止在市区燃放鞭炮的规定。而关于"禁炮"的行动,被政府随之开展,也引发了传承传统文化与保护生态环境的矛盾。转译社会学是科学社会学的重要理论,以该视角考察闽南春节"禁炮"的社区协商与环境治理机制,分析作为"禁炮"行动发起人的政府所采取的四个转译策略,探寻相关行动者为有效解决这一矛盾的路径,最终形成一个异质型行动者网络。     

China Apparel Retail Sales Value +21.79% Y/Y in Jul.

China Jul.-Apparel retail sales value in major department stores picked up sharply in Jul. 2011, rising by about 21.79 percent y/y to CNY 10.61 billion, according to China Nation Commercial Information Center. For volume, retail sales volume of apparel products edged up 5.85% y/y to 33.10 million pieces in Jul.     

Are all investment decisions to subscribe to new stocks mindless?Investor heterogeneity and behavior in the process of subscribing to new stocks

The IPO process is a way for companies to improve their corporate governance and for investors to assess company quality.This paper posits that investor choices...     

The effects of haze pollution on stock performances: evidence from China

Haze pollution has become the most important environmental issue in China in recent years. Using the data of PM_2.5 concentration and stocks of listed companies located in Beijing between 2010 and 2014, this article investigates the effects of haze pollution on stock performances. Empirical results indicate that haze pollution has significant negative effects on stock returns and significant positive effects on stock volatilities, through the channel of investors’ mood. Furthermore, the effects of haze pollution on stock returns emerge gradually and the effects of haze pollution on stock volatilities weaken gradually over time during a trading day.     

企业家社会责任行为方式创新对其形象评价的影响机制研究

运用扎根理论探究了企业家创新性社会责任行为的特征及作用机制。基于扎根理论，就企业家微公益行为对其形象评价的影响机制进行了探索性研究。通过深度访谈与二手数据的扎根分析，提出了企业家微公益行为对其形象评价影响的理论框架：企业家微公益行为具有权威性、互动性与多样性，会通过情感和认知两大层面来获取消费者认同感，并影响消费者对企业家微公益行为动机的感知，进而影响其形象评价。该研究是对企业家社会责任理论的有益拓展，同时为希望通过社交网络进行公益活动的企业家提供了实践参考。     

Opportunity recognition and SME performance: the mediating effect of business model innovation

Opportunity recognition is vital for small and medium-sized enterprises (SMEs), but SMEs face challenges in capturing recognized opportunities. Given that opportunity recognition does not automatically lead to higher SME performance and that SMEs need to take appropriate actions to exploit recognized opportunities to achieve better performance, it is imperative to explore the mediators that enable SMEs to translate opportunity recognition into higher performance. This study proposes that business model innovation may be a key conduit through which opportunity recognition affects SME performance. Based on a dataset of 155 SMEs, we find that the positive relationship between opportunity recognition and SME performance is mediated by business model innovation. These findings not only aid SMEs in accomplishing the performance effect of opportunity recognition, but also provide some insights into the implications of business model innovation.     

唐宋里坊制演变及其对当前的启示——国家与社会关系的视角

唐宋之交商品经济的蓬勃发展及其引发的一系列制度变革导致国家和社会关系从"国家凌驾于社会之上"向"国家与社会互动"变迁。里坊既是国家权力在城市的末梢,也是城市居民的基本生活场域,是联结国家和社会关系的纽带。国家和社会关系的重构也导致里坊制的演变,坊墙逐步被废除,里坊的社会控制功能也大大弱化。里坊制的演变又推动了商品经济发展、城市文化繁荣、社会组织发展、市民的空间流动与身份流动,进而进一步促进国家与社会互动。这与我国从计划经济到市场经济转型过程中单位制的演变具有诸多相似之处,并给我们带来以下三点启示:(1)从单位制到街区制对我国当前国家和社会关系调整具有积极作用;(2)单位制的消解是一个长期的过程,有可能出现阶段性反复;(3)围墙是单位制的重要组成部分,其存废预示着单位制的兴衰。     

REGIONAL ANTI‐CORRUPTION EFFORT,POLITICAL CONNECTIONS AND FIRM INNOVATION EFFORT: EVIDENCE FROM CHINA

This paper examines how firm characteristics and local anti‐corruption effort moderate the influence of political connections on enterprises’ private R&D investment using data from 2,587 Chinese A‐share listed enterprises. Our results show that the local anti‐corruption institutional environment significantly moderates the strong relationship between political connections and enterprises’ private R&D investment. Firm characteristics (i.e., firm size and firm age) also show a moderating effect on the relationship between political connection and enterprises’ private R&D investment; larger and older enterprises are more likely to have innovative resources and business cooperation partners, and thus are able to reduce their degree of reliance on political connections and government funding. The results of our study suggest the importance of having a transparent and fair institutional environment for enterprise innovation activities.