Front-Country Campers' Constraints,Negotiation, and Pro-Environment Behavioral Intention: An Extension to the Theory of Planned Behavior

The theory of planned behavior (TPB) has been successfully tested in leisure and outdoor recreation studies over the last few decades. However, the inclusion of new predictors to improve the theory's predictive power has been encouraged. Utilizing leisure constraints approach, we extended the TPB by adding constraints to the theory. The literature also suggested that individuals employ cognitive and behavioural negotiation strategies to overcome their constraints. Therefore, the influence of negotiation through the constraints was also explored in this study. A sample of 1,009 front-country campers was analyzed to test the proposed extension to the TPB. Results of structural equation modeling confirmed a strong, negative indirect association between constraints and intention. Negotiation was positively and indirectly associated with intention. The proposed extension to the TPB was capable of capturing 84% of variation in intention. Theoretical and practical implications of these findings are discussed.     

瓜蒌配方颗粒指纹图谱研究

为了全面反映瓜蒌配方颗粒所含多种组分,明确瓜蒌配方颗粒HPLC指纹图谱的测定方法,对10批瓜蒌配方颗粒进行了HPLC指纹图谱测定及相似度评价。采用HPLC方法,色谱柱为GL Sciences公司InertSustain AQ-C_(18)柱(4.6 nm×250 nm,5μm),以甲醇-0.1%甲酸水溶液为流动相,梯度洗脱,检测波长为260 nm,流速为0.8 mL/min,柱温为25℃,对瓜蒌配方颗粒指纹图谱测定结果进行了相似度评价。结果表明,10批瓜蒌配方颗粒指纹图谱中呈现16个共有峰,相似度均大于0.960,表明瓜蒌配方颗粒具有良好的一致性;此外,在16个共有峰中指认出腺嘌呤、尿苷2个化学成分。瓜蒌配方颗粒指纹图谱反映了瓜蒌配方颗粒的多组分面貌,可为瓜蒌配方颗粒的多组分质量控制提供参考依据。     

HPLC法同时测定麻黄-桂枝药对水煎液中5种成分的含量

为了进一步完善麻黄-桂枝药对的质量评价方法,利用HPLC法,分别在2种波长条件下,同时测定麻黄-桂枝水煎液中盐酸麻黄碱、盐酸伪麻黄碱、香豆素、肉桂酸、桂皮醛5种成分的含量.采用Diamonsil C18(4.6 mm×250 mm,5μm)色谱柱,以乙腈-0.1％磷酸溶液为流动相,梯度洗脱,流速为1.0 mL/min,...     

Competition in government and industry procurement contracting

This study explores government and industry procurement official's perception of inhibiting factor importance to competition in Federal contracting. Within the government sector as well as the industrial sector there are no significant differences in perceived factor importance. However, between the industry and government sectors significant differences in perceived factor importance do exist. The study also reveals some commonality of factors identified by both sectors as important inhibitors to competition.     

Indivisible commodities and an equivalence theorem on the strong core

We consider a pure exchange economy with finitely many indivisible commodities that are available only in integer quantities. We prove that in such an economy with a sufficiently large number of agents, but finitely many agents, the strong core coincides with the set of expenditure-minimizing Walrasian allocations. Because of the indivisibility, the preference maximization does not imply the expenditure minimization. An expenditure-minimizing Walrasian equilibrium is a state where, under some price vector, all agents satisfy both the preference maximization and the expenditure minimization.     

ST公司的治理“病因”与“康复”之策

股权结构严重失衡、最终控制人产权不清、管理层薪酬与绩效脱节等问题是ST公司治理水平落后、经营绩效低下的主要原因。完善股权制衡机制、规范薪酬奖励、强化产权对经营者的正向约束、优化委托代理关系是ST公司完善公司治理、摆脱经营困境的必由之路。     

资源型城市金融锁定与反锁定研究——以铜陵市为例

文章以资源型城市铜陵市为例,运用实证分析方法,对铜陵市十余个行业资金配置效率进行排序,并通过与EVA（经济增加值）回报率排序进行比较分析,来探讨资源型城市的金融锁定与反锁定安排。认为在资源型城市中,金融服务较为集中于以资源为主导的行业,产业结构制约了金融资源配置的优化,欠佳的信贷结构又反过来加深了产业结构的锁定。其次银行业金融机构要想在资源型经济中获得可持续发展,就不能固守单一追求效率原则。一方面通过信贷结构的调整,推动产业的转型和优化升级,延伸产业链,提升产品附加值;另一方面通过实施金融资源重置,谋划新兴工业化经济发展战略,打破传统的过度依赖于少数几个产业的瓶颈。     

CH-2000的液相色谱分析

文章采用液相色谱外标法对三唑类除草剂CH-2000原药进行了定量测定,该方法的标准偏差为0.21,变异系数为0.23%,回收率在99.1%～100.5%之间。     

西门子S7-400HPLC在热电厂双冗余烟气脱硫系统中的应用

文章介绍了通过INTOUCH10软件和西门子S7-400H型PLC冗余设计的自动化控制系统的硬件、网络组成及软件设计,实现了火电厂烟气脱硫系统的远程及上位机监控,满足了生产工艺要求,运行稳定减排郊果明显。     

阳离子交换高效液相色谱法测定纸巾纸和卫生纸中的丙烯酰胺单体残留量

建立了阳离子交换高效液相色谱法测定纸巾纸和卫生纸中的丙烯酰胺单体残留量的检测方法,方法的检出限为1mg/kg,回收率为90.4%-104.2%,相对标准偏差为2.3%,线性相关系数为0.9998,该方法简单、易操作、灵敏度高,是测定纸巾纸和卫生纸中丙烯酰胺的有效测定方法。