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压裂液多为植物胶体系,容易腐化变质。在压裂液中加入一定比例的杀菌剂能防止压裂液腐化变质,粘度下降,从而保证压裂液的性能。通常采用甲醛作为杀菌剂,但甲醛对人体具有较强的刺激和伤害,所以开发了新型环保杀菌剂FS-2。本产品具有易溶于水,无色、无味、无毒。通过实验验证了FS-2杀菌剂与其他试剂配伍性良好,杀菌抑菌能力强,加入杀菌剂后压裂液体系的耐温耐剪切性能良好。通过对比甲醛和FS-2杀菌剂的各项性能,FS-2杀菌剂不但可以代替甲醛,而且较甲醛更为环保。 相似文献
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本文从电子市场的需求和供给两个方面提出一个中小企业商家对商家(B2B)电子市场采用影响因素的模型,并进行验证,结果表明,电子市场的网站因素、创新扩散因素、企业内部因素对企业电子市场采用有显著的正向影响,其中企业内部因素的影响最为显著;而电子市场的功能模式因素、企业外部因素对企业采用电子市场的影响并不显著. 相似文献
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Diversity in Demographic Characteristics,Abilities and Personality Traits: Do Faultlines Affect Team Functioning? 总被引:3,自引:0,他引:3
This study examines the impact of faultlines within teams on cohesion and conflicts. Faultlines concern the attributes of several team members simultaneously and mirror the structure of diversity within a team. The strength of a faultline indicates the level of similarity within potential subgroups and its width the extent of dissimilarity between them. The faultlines addressed in this study are based upon the demographic characteristics, abilities and personality traits of team members. We also address the interaction of team autonomy on the effects of faultlines. Data for this study were collected by means of questionnaires administered to 99 teams of undergraduate students. The results indicate that demographic faultlines directly impair the functioning of a team. Team autonomy conditioned both the relationship between the strength of the ability faultline and team cohesion and the relationship between the depth of the personality faultline and intra-team conflict. In other words, these faultlines are more detrimental to team functioning when team autonomy is high. Ability faultlines seem to emphasize similarities within subgroups, while personality faultlines accentuate dissimilarities between subgroups. 相似文献
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Guo Yan 《中国对外贸易(英文版)》2008,(10):22-23
Since the normalization of the diplomatic ties between China and ) Japan, the bilateral economic relations have deepened continually. According to the statistic of Japan, China passed U.S. to become Japan's top trade partner as well as is the second largest export market for Japan and is the largest import resource for Japan. Japan companies such as Mitsui, Sumitomo, Sony and Panasonic, have set the subsidiaries in China and explored their scales. This year 2008 marks the 30th anniversary of the signing of the ChinaJapan Treaty of Peace and Friendship. 相似文献
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Ya'arit Bokek-Cohen 《Consumption Markets & Culture》2016,19(6):534-554
The article critically examines the marketing strategy employed by Israeli sperm banks as sites for biopolitical governmentality of sperm consumers. The dataset comprise multiple sources which converge to provide evidence for the transfusion of militaristic Zionist ideology into sperm. The biopolitics of sperm marketing involves the naturalization of militaristic Zionism as a dogmatic basis for a “dividing practice” for the inclusion and exclusion of particular types of personified gametes in the symbolically constructed collective gene pool. The image of the military man is the idealized type of hegemonic masculinity in the Israeli nation-in-arms. The warrior-donor is both the supplier of the product and the core product itself, and his semen constitutes the materialistic carrier of his spiritual essence. Using Foucault's notion of biopolitical governmentality suggests why militaristic Zionism discourse has such potency in sperm marketing, and raises questions about contemporary “technologies of the self” as consumerist practices. 相似文献
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This article examines the effect of unionization on welfare and trade policy using a model of duopolists competing in a third market. The traditional result that the presence of a union necessitates a stronger strategic trade policy to reach the optimal level of welfare hinges on the mode of competition. With Bertrand duopolists, a union can be welfare-improving; it can also lead to a weaker trade policy, or even reverse the direction of the optimal policy. Our results highlight the importance for trade policy of understanding the nature of firm behavior and the institutional features of the labor market. 相似文献
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Erja Toiviainen‐Laine Risto Kuisma Hanna‐Riitta Kymäläinen Anna‐Maija Sjöberg 《International Journal of Consumer Studies》2009,33(4):396-406
In many countries, changes in the pattern of working lives and ageing of the population increases the need for professional cleaning in private domestic homes. The objective of this study was to obtain basic knowledge concerning professional home cleaning. The study consisted of two parts. First, cleanability of surfaces contaminated with microbiological and organic soils was examined in the laboratory using cleaning cloths, detergents and rapid detection methods with potential for use in conjunction with professional cleaning in private homes. Second, hygienic conditions in three households were screened using the same rapid detection methods as in the laboratory experiments. According to the laboratory study, the cleaning efficiency of the non‐woven cloth was clearly poorer than that of the cleaning cloths containing microfibers. There were differences between the efficacy of the cleaning agents in removal of protein and microbiological soils. Despite the differences between surface topography observed with scanning electron microscopy, differences between the cleanability of the three examined surface materials (steel and two plastic surfaces) were small. In hygiene monitoring, the highest levels of total aerobic bacterial counts were detected in the plughole of the sink, on the eating table in kitchens and along the edge of the toilet washbowl and the cover of toilet seats. Low amounts of Enterobacteriaceae indicating faecal contamination were detected in the toilet and bathroom after cleaning. Moulds were not detected in any of the three households, and the amounts of yeasts were low. Detection methods, microbiological dipslides and the protein test, were well suited to the laboratory study. Furthermore, they complemented each other in the hygiene monitoring. The information obtained will be used for development of better practices in professional home cleaning. Good quality management in professional home cleaning and the cleanliness of surfaces in homes are important factors affecting comfort and safety. 相似文献
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Nikos Bozionelos Giorgos Bozionelos Panagiotis Polychroniou Kostantinos Kostopoulos 《Journal of Business Research》2014
The research investigates the relationship of the Big-Five of personality with mentoring receipt with the use of two independent studies. The findings of the studies show substantial consistency. Equations of quadratic form describe half of the tested relationships better than linear equations. The association of openness to experience and agreeableness with mentoring receipt is of inverted U-shape. The benefits of being open and agreeable for mentoring receipt cease to exist at high values of these traits. On the other hand, emotional stability and conscientiousness demonstrate exclusively positive linear relationships with mentoring receipt. The form of the relationship of extraversion differs between the two studies, but the overall trend is positive. The substantial quadratic component in the association of personality with receipt of mentoring means that research hitherto may be grossly underestimating the effects of personality on developmental relationships because earlier studies assume strictly linear associations. Parts of the results also imply that the associations of certain personality traits with mentoring receipt may depend upon the occupational context. 相似文献
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《Business History》2012,54(7):1152-1177
Economic theories of commercial nonprofits and mutuals usually emphasise the advantages of such organisational forms in reducing agency and monitoring costs in markets that suffer from information asymmetries in exchanges between firms and their customers. This article examines the ability of such transaction cost theories to account for historical variations in the ownership and governance of firms in the US personal finance industry between the early nineteenth century and the Great Depression. It focuses, in particular, on mutual savings banks and their role in the development of the intermediated market for savings accounts. While I find some evidence in support of transaction cost theories of organisational form, I also find that entrepreneurial and socio-political factors played crucial roles in the choice of ownership and governance structures; mutual savings banks predominated in the early years of the industry because the form offered entrepreneurial advantages over investor-owned corporations and because in some states they benefitted from regulatory and political advantages that joint-stock companies lacked. Their relative decline by the early twentieth century was the result of increasing competition in the market for savings deposits, the loosening of regulatory barriers to entry, and changes in public policy that reduced the transaction, innovation and regulatory advantages that the mutual savings bank form had once held. The article draws out the theoretical implications for our understanding of the historical role of nonprofit and mutual firms. 相似文献
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《Journal of East-West Business》2013,19(3-4):27-52
Abstract The paper focuses on the internationalization activities of Japanese MNCs in Central and Eastern Europe (CEE) analyzing data on national level considering Japan's modes of market entry in the CEE region and some of the countries in it. Major trends and the development of Japanese internationalization in CEE are presented. Individual mini case studies contribute to the analysis using the experience of several major Japanese MNCs that have invested in the region. The goal of the paper is to uncover the specifics of the internationalization process of Japanese corporations in the CEE region. Main characteristics of the penetration of Japanese MNCs in CEE are unveiled and discussed in the concluding part of the paper. The management implications and conclusions from the study are discussed further in the final part of the paper. 相似文献