The impurity characteristics of methamphetamine synthesized by Emde and Nagai method

Impurity profiling and classification of seized methamphetamine may play an important role in the interpretation of analytical results, the determination of the synthetic method employed, and the criminal investigations of drug traffic routes. Our study is focused on classifying seized methamphetamine samples according to the groups sorted by the types and quantities of impurities present in illicit methamphetamine samples. The samples (100 mg) were dissolved in 2 mL of potassium phosphate buffer (pH 7.0), extracted with 200 μL of ethyl acetate under basic condition, and then analyzed by gas chromatography-mass spectrometry (GC–MS) with a DB-1 capillary column (30 m × 0.25 mm i.d., 0.25 μm). Five impurities are used as criteria for the classification of seized methamphetamine samples by Emde and Nagai method. A total of fifty-two samples of seized methamphetamine were analyzed by GC–MS and classified by five organic impurities, and then sorted into four groups, which are Nagai type, Emde Type, Undetermined I type, and Undetermined II type.     

Differing patterns of marriage between a city and villages in 18th century Korea: The case of Taegu Area

While the urban area was increasingly filled with middle- and low-status residents, the rural area was dominated by high-status settlers whose number increased because of migration from the city and natural growth. Remarkable differences existed between urban and rural marriage features such as marriage age and rate of remarriage. The more sincere adoption of the high-status marriage culture in the rural area may be attributed to its occupational homogeneity. In the rural agrarian settings, landlords, self-cultivators and tenants shared a similar living pattern and value system based on the agricultural cycle. The urban area, however, exhibited a variety of work patterns of local functionaries, artisans and merchants. Many middle- and low-status people might well have found the high-status culture of the rural area incompatible with their own.     

A welfare simulation of mixed-member electoral systems

This paper considers welfare properties of mixed-member electoral systems. In a mixed system, voters may elect high-quality district representatives without excessive campaign fundraising. Simulation results reveal that the optimally mixed electoral system can be welfare-enhancing, but a poorly targeted electoral reform can do worse than a PR system or plurality rule.     

Atrial natriuretic peptide signal pathway upregulated in stomach of streptozotocin-induced diabetic mice

AIM:To investigate atrial natriuretic peptide(ANP) secretion from gastric mucosa and the relationship between the ANP/natriuretic peptide receptor type A (NPR-A)pathway and diabetic gastroparesis. METHODS:Male imprinting control region(ICR)mice (4 wk old)were divided into two groups:control mice, and streptozotocin-induced diabetic mice.Eight weeks after injection,spontaneous gastric contraction was recorded by using physiography in control and streptozotocin-induced diabetic mice.The ANP-positive cells in ...     

论韩国民法对所有权的限制——以坟墓基地权为视角

作为韩国独有的坟墓基地权是一种与地上权类似的物权,关于其慨念、性质、基本内容以及其与所有权之间的冲突和矛盾一直是韩国理论界和司法实践关注的焦点.结合立法与司法,对困扰学界的坟墓基地权的慨念、性质、内容、产生原因以及效力做出阐释,以求澄清、解决问题.     

The INSPIRE Framework: How Public Administrators Can Increase Compliance with Written Requests Using Behavioral Techniques

Public administrators rely on written communications to send information to citizens and stakeholders, and they are among the heaviest users of the postal service. Behavioral science research has identified several techniques that public administrators can use to increase compliance with written requests and, in turn, increase effectiveness. Currently, however, many written communications from government bodies are not written in a manner that utilizes these techniques. It remains an ongoing challenge for public administrators to identify, understand, and use these techniques in the written communications sent by their organizations. This article presents a framework capturing seven prominent techniques in a simple mnemonic—INSPIRE—that is already being used by several government bodies in Australia. It also provides practical examples of how to use each technique and demonstrates that using these techniques could result in large aggregate improvements in effectiveness and socially desirable outcomes of public administrators' written communications.     

Loyalty or Competence: Political Use of Performance Information and Negativity Bias

This article explores how political principals weigh loyalty and competence in public personnel decisions. Exploiting the abrupt shift in political leadership following the impeachment of President Park Geun‐hye of Korea, the authors examine how the newly elected president made the decision to retain or dismiss 118 agency heads appointed by the previous administration. The evidence shows the importance of loyalty in managerial survival: those who had a political patronage relationship with the ousted president were less likely to survive in the new administration. However, the authors also demonstrate the relevance of competence, as measured by the outcomes of agency performance evaluation. Further, the article shows the existence of negativity bias: the punishment for low performance is greater than the reward for high performance. Finally, the authors provide support for the idea that political principals reward loyalists, but only if they show acceptable levels of competence.     

Direct Democracy and Women's Political Engagement

What are the conditions that promote gender equality in political participation? In this article, I propose that the presence of direct democracy expands gender equality in political participation by signaling the system's openness to women's voice, confirming their political competency, and highlighting their stake in political decisions. To test this argument, I leverage a quasi‐experiment in Sweden in the aftermath of the introduction of universal suffrage, where the type of municipal political institutions was determined by a population threshold. My findings lend strong support to the effect of direct democracy on the political inclusion of women. I find that the gender gap in electoral participation was smaller in municipalities using direct democracy than in similarly sized municipalities that only had representative institutions.     

Self-control,Mental Health Problems,and Family Functioning in Adolescence and Young Adulthood: Between-person Differences and Within-person Effects

Journal of Youth and Adolescence - Adolescents’ self-control develops in the context of mental health and family functioning, but it is unclear how the interplay of self-control, mental...     

Breastfeeding Duration and Reported Child Maltreatment in a Population-based Alaskan Birth Cohort

Journal of Family Violence - Research suggests that breastfeeding may reduce child maltreatment risk. Alaska has high rates of both breastfeeding initiation and maltreatment reports to Child...