Suchergebnisse

Ophiocordyceps sinensis has been utilized in China and adjacent countries for thousands of years as a rare functional food to promote health and treat diverse chronic diseases. In recent years, adulterants are usually identified in the processed products of wild O. sinensis. However, the effective adulteration examination has to be additionally performed except their routine test, and accordingly is time- and money-consuming. Recently, arsenic determination has become a necessary test for confirming whether the concentrations of inorganic arsenic are over the O. sinensis limit. In this work, the contents of total arsenic and As species in cultivated O. sinensis, Cordyceps militaris, and other edible fungi were determined by ICP-MS and HPLC-ICP-MS. The results suggest that the As speciation exhibits a species-specific behavior, and accompanies the effect of the As background. The proportions of unknown organic As and contents of total As may be considered as sensitive markers for discriminating wild O. sinensis. This result provides a novel clue for discriminating wild and artificially cultivated mushrooms/their products, with emphasis on arsenic markers for authenticating wild O. sinensis.

Background: Chinese female adolescents engaged in sex trade and substance use are often criminalized and stigmatized. As a result of these cultural, legal and political constraints, ethical concerns can discourage investigators from engaging these adolescents in research. This paper aims to address the ethical tensions between protection and inclusion in conducting sexual and reproductive health (SRH) research with adolescents engaged in high-risk behaviours. Processes of moral reasoning, and examples and practical mechanisms in managing such ethical challenges were presented in the hope of advancing the research ethics policies and practice with adolescents. Methods: We extracted ethical issues from three previously conducted SRH studies involving 517 Chinese female adolescents. Utilizing the principles of justice, beneficence, and respect for persons as articulated in the Belmont Report as a framework, we thematically summarised the key ethical considerations regarding inclusion and protection, then examine the ethical tensions and solutions within the local context. Results: Findings suggest that the balance between protection and inclusion can be achieved by both considering the evolving decision-making capacity of adolescents as well as the level of risk. A community-based participatory approach shows promise in advancing adolescent engagement and empowerment. Ethically robust approaches contribute to the greater relevance and validity of the findings. Conclusions: Our studies suggest that it is crucial to achieve adolescents' meaningful involvement in all levels of research and interventions, researchers need to shift their perspectives of the target population from subjects to key stakeholders in design and implementation of research.