EXPOSURE TO NANOPARTICLES AND HORMESIS

Nanoparticles are particles with lengths that range from 1 to 100 nm. They are increasingly being manufactured and used for commercial purpose because of their novel and unique physicochemical properties. Although nanotechnology-based products are gener- ally thought to be at a pre-competitive stage, an increasing number of products and mate- rials are becoming commercially available. Human exposure to nanoparticles is therefore inevitable as they become more widely used and, as a result, nanotoxicology research is now gaining attention. However, there are many uncertainties as to whether the unique properties of nanoparticles also pose occupational health risks. These uncertainties arise because of gaps in knowledge about the factors that are essential for predicting health risks such as routes of exposure, distribution, accumulation, excretion and dose-response relationship of the nanoparticles. In particular, uncertainty remains with regard to the nature of the dose-response curve at low level exposures below the toxic threshold. In fact, in the literature, some studies that investigated the biological effects of nanoparticles, observed a hormetic dose-response. However, currently available data regarding this topic are extremely limited and fragmentary. It therefore seems clear that future studies need to focus on this issue by studying the potential adverse health effects caused by low-level exposures to nanoparticles

Carbohydrate‐Based Electron Donor for Biological Nitrate and Perchlorate Removal From Drinking Water

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142444/1/awwa0143.pd

Threshold for detection of diabetic peripheral sensory neuropathy using a range of research grade monofilaments in persons with Type 2 diabetes mellitus

<p>Abstract</p> <p>Aims</p> <p>To identify the threshold of reduced sensory perception in Type 2 diabetes mellitus (Type 2 DM) using a range of research grade monofilaments.</p> <p>Methods</p> <p>Three groups of participants were recruited into a between subject, cross-sectional study. Group 1(NEW), persons with Type 2 DM diagnosed for less than 2 years (<it>n </it>= 80); Group 2 (EST) persons with Type 2 DM diagnosed for more than 2 years (<it>n </it>= 91), and Group 3, a Comparison group without Type 2 DM (<it>n </it>= 73), resulted in a total study population, <it>n </it>= 244. Research grade monofilaments (2, 4, 6, 8 and 10-gram) were employed using standardised protocol, at 6 sites on the plantar aspect of both feet. The demographic and anthropometric measures of gender, age, height, weight, body mass index (BMI), blood pressure and duration of Type 2 DM since diagnosis (if applicable) of the participants were analysed.</p> <p>Results</p> <p>Perception of the research grade monofilaments differed significantly between the 3 groups (p < 0.05). The 6-gram monofilament was found to be the threshold of normal perception, based on 90% of the Comparison group perceiving the 6-gram monofilament at all sites in contrast to 64% of NEW and 48% of EST groups.</p> <p>Conclusion</p> <p>The 6-gram monofilament was identified as the threshold of normal sensory perception. Inability to perceive the 6-gram monofilament indicates, when using the method described in this study, that diminution of sensory perception is evident. Employing a range of monofilaments, 6, 8 and 10-grams in Type 2 DM foot screening would allow the clinical detection of deteriorating sensory perception and enable implementation of foot protection strategies at an earlier stage than is currently practised.</p

Scientific and Legal Perspectives on Science Generated for Regulatory Activities

This article originated from a conference that asked “Should scientific work conducted for purposes of advocacy before regulatory agencies or courts be judged by the same standards as science conducted for other purposes?” In the article, which focuses on the regulatory advocacy context, we argue that it can be and should be. First, we describe a set of standards and practices currently being used to judge the quality of scientific research and testing and explain how these standards and practices assist in judging the quality of research and testing regardless of why the work was conducted. These standards and practices include the federal Information Quality Act, federal Good Laboratory Practice standards, peer review, disclosure of funding sources, and transparency in research policies. The more that scientific information meets these standards and practices, the more likely it is to be of high quality, reliable, reproducible, and credible. We then explore legal issues that may be implicated in any effort to create special rules for science conducted specifically for a regulatory proceeding. Federal administrative law does not provide a basis for treating information in a given proceeding differently depending on its source or the reason for which it was generated. To the contrary, this law positively assures that interested persons have the right to offer their technical expertise toward the solution of regulatory problems. Any proposal to subject scientific information generated for the purpose of a regulatory proceeding to more demanding standards than other scientific information considered in that proceeding would clash with this law and would face significant administrative complexities. In a closely related example, the U.S. Environmental Protection Agency considered but abandoned a program to implement standards aimed at “external” information

Nursing and midwifery students' perceptions of spirituality, spiritual care, and spiritual care competency: A prospective, longitudinal, correlational European study

Background Nurses and midwives care for people at some of the most vulnerable moments of their lives, so it is essential that they have the skills to give care which is compassionate, dignified, holistic and person-centred. Holistic care includes spiritual care which is concerned with helping people whose beliefs, values and sense of meaning, purpose and connection is challenged by birth, illness or death. Spiritual care is expected of nurses/midwives but they feel least prepared for this part of their role. How nursing and midwifery students can be prepared for spiritual care is the focus of this study. Objectives 1. To describe undergraduate nursing and midwifery student's perceptions of spirituality/spiritual care, their perceived competence in giving spiritual care and how these perceptions change over time. 2. To explore factors contributing to development of spiritual care competency. Methods Prospective, longitudinal, multinational, correlational survey design. A convenience sample of 2193 undergraduate nursing and midwifery students (69% response rate, dropping to 33%) enrolled at 21 universities in eight countries completed questionnaires capturing demographic data (purpose designed questionnaire) and measuring perception of spirituality/spiritual care (SSCRS), spiritual care competency (SCCS), spiritual wellbeing (JAREL) and spiritual attitude and involvement (SAIL) on 4 occasions (start of course n = 2193, year 2 n = 1182, year 3 n = 736, end of course n = 595) between 2011 and 2015. Data were analysed using descriptive, bivariate and multivariate analyses as appropriate. Results Perceived competency increased significantly over the course of students' study which they attributed to caring for patients, events in their own lives and teaching/discussion in university. Two factors were significantly correlated with perceived spiritual care competency: perception of spirituality/spiritual care, where a broad view was preferable, and personal spirituality, where high spiritual wellbeing (JAREL) and spiritual attitude and involvement (SAIL) scores were preferable. Conclusions We have provided the first international evidence that perceived spiritual care competence is developed in undergraduate nursing and midwifery students and that students' perceptions of spirituality and personal spirituality contribute to that development. Implications for teaching and learning and student selection are discussed. The study is limited by attrition which is common in longitudinal research