高效液相色谱法测定苯海拉明薄荷霜中盐酸苯海拉明的含量

目的：建立测定苯海拉明薄荷霜中盐酸苯海拉明的含量方法。方法采用高效液相色谱法（HPLC）,色谱柱为Phenomenex Luna-CN柱（200.0 mm×4.6 mm,5μm）,流动相为乙腈-水-三乙胺（50：50：1）（用冰醋酸调节pH值至6.5）,流速为1.0 ml/min,检测波长为258 nm。结果盐酸苯海拉明在0.0411～0.6170 mg/ml浓度范围内,线性关系良好（r=0.9998）,测得平均回收率为99.28%,RSD为0.81%。结论本方法准确、灵敏、可靠,可用于苯海拉明薄荷霜的含量测定。     

Who has benefited from the health services system for the elderly in Japan?

This paper examines the demand and supply of medical services for the elderly in the health services system characterized by per-month fixed copayment and selective capitation fee scheme for outpatients with chronic diseases. The results indicate that the beneficiary, in particular the household dependent, visits a physician more frequently because the actual copayment decreases for the household dependent, but is nearly the same for the head of the household. Physicians, however, provide more services to the beneficiary partly because of the lowered copayment and partly because of the capitation fee scheme, which they will select instead of the fee-for-service scheme only when capitation is more profitable than Fee-for-Service. As a result, physicians as well as the insured benefit from the health services system.     

Acquisitions and firm growth: Creating Unilever's ice cream and tea business

The role of acquisitions has been widely discussed in management literature. There is considerable evidence that many acquisitions fail, often because of post-acquisition problems. More recently business historians have examined their role in the restructuring of the British, American and other economies after World War Two. Yet the historical and management literatures have been poorly integrated. This article seeks to address some of the issues raised in the management literature by contributing a longitudinal case study of the use of acquisitions by Unilever to build the world's largest ice cream and tea businesses. The study supports recent resource-based theory which argues that complementary rather than related acquisitions add value. It identifies the importance of local knowledge as a key complementary asset. It also identifies reasons why Unilever was able to integrate acquisitions quite successfully, including clear strategic intent and the fact that employee resistance was reduced because most acquisitions were agreed. Finally Unilever could take a long-term view because of its size, and relative unconcern for shareholder interests before the 1980s.     

Pre‐commitment to an Exclusive Contract under Partial Regulation

This article examines the welfare implications of an incumbent’s pre‐commitment to an exclusive contract in a partially regulated environment. It shows that the contract offered to customers in a competitive market makes the first‐best allocation infeasible in the partially regulated environment. However, the contract can have a welfare‐enhancing property through the exclusion of inefficient entry or cream skimming in the competitive market, especially when the regulated price ceiling is low and the incumbent’s technology is characterized by a large proportion of common cost in total cost.     

气相色谱法测定脑立清胶囊中龙脑、薄荷脑含量的不确定度

目的：探讨气相色谱法（GC）测定脑立清胶囊中龙脑、薄荷脑含量测量的不确定度。方法建立数学模型,对测试方法流程逐一分析,确定不确定度来源。结果结合GC方法验证数据,经计算,龙脑和薄荷脑的合成不确定度分别为0.259 mg/粒和0.515 mg/粒,扩展不确定度分别为0.518 mg/粒和1.030 mg/粒。结论本方法建立的不确定度计算方法,可用于GC法测定该药物中两组分含量的不确定度分析,有利于进一步提高含量测定的准确性。