University of Vermont

About: University of Vermont is a education organization based out in Burlington, Vermont, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 17592 authors who have published 38251 publications receiving 1609874 citations. The organization is also known as: UVM & University of Vermont and State Agricultural College.

Asbestos-related diseases.

Abstract: Mise a jour: identification et differents types d'amiante; maladies liees a l'exposition a l'amiante: mesotheliome, cancers du poumon, du larynx, du tube digestif, asbestose, lesions pleurales benignes. Caracteres de l'amiante importants pour la determination de maladies. Risques d'exposition non professionnelle. Considerations de prevention

Laboratory methods and quality assurance in the Cardiovascular Health Study.

Abstract: The Cardiovascular Health Study is an observational cohort study of risk factors for cardiovascular disease in 5201 participants, ages > or = 65 years. We report the methods and quality-assurance results for blood procurement, processing, shipping, storage, and sample analysis used during the first examination period (May 1989-June 1990). The most frequent difficulty in phlebotomy and processing was the requirement of more than one venipuncture (in 2.6% of the participants). The CVs for control materials ranged from 0.93% for glucose to 10.7% for insulin; most were < 4%. In addition to standard quality-assurance methods, we applied two other methods: technical error calculation for replicates, and weighted linear regression to assess time trend in results of control materials. After outliers were excluded, technical error values ranged from 1.7 for uric acid to 18.8 for insulin. Factor VII and factor VIII had slight trends over the 12-month analysis period. Results of quality-assurance analyses used to resolve problems were successful, thereby improving the second laboratory examination.

Use of Weakly Coordinating Anions to Develop an Integrated Approach to the Tuning of ΔE1/2 Values by Medium Effects

Abstract: An integrated approach to the control of ΔE1/2 values, and therefore comproportionation equilibria, through medium effects was delineated for multi-step redox reactions involving cationic products. ΔE1/2 values (defined as E1/22+/1+ − E1/21+/0) of the two one-electron oxidations of bis(fulvalene)dinickel, 1, were measured under 45 different conditions of solvent and supporting electrolyte. The smallest value, 212 mV, was found in anisole/0.1 M [NBu4]Cl and the largest, 850 mV, in CH2Cl2/0.02 M Na[B(C6H3(CF3)2)4]. By systematically changing the solvent properties, the degree of ion-pairing strengths of the supporting electrolyte ions, and the concentration of the electrolytes, a set of ideal properties was found for maximizing ΔE1/2 values involving positively charged electrode products. Most importantly (i) the solvent must be of lower polarity and low donor strength and (ii) the supporting electrolyte must have a weakly coordinating anion (WCA). The contrast in ion-pairing tendencies of 12+ with WCAs (on...

Measuring and Estimating Species Richness, Species Diversity, and Biotic Similarity from Sampling Data

Abstract: This article reviews modern statistical approaches to estimating species diversity and biotic similarity from empirical samples of species abundance or incidence Key methods include rarefaction, extrapolation, and non-parametric estimation of the asymptote of species richness Hill numbers are presented as unifying indices of species diversity that take into account the relative abundance of different species Species richness estimators, Hill numbers, and measures of biotic similarity can be extended to account for phylogenetic, taxonomic, and functional diversity of biological assemblages These statistical methods control for sampling effects in biodiversity data and can be applied to many important questions in ecology