Recycling of Mechanically Ground Wind Turbine Blades as Filler in Geopolymer Composite.

This paper concerns the recycling of waste material from wind turbine blades. The aim of the research was to determine the possibility of using ground waste material derived from the exploited structures of wind turbines as a filler in geopolymer composites. In order to determine the potential of such a solution, tests were carried out on three different fractions originating from the ground blades of wind turbines, including an analysis of the morphology and chemical composition of particles using SEM and an EDS detector, the analysis of organic and inorganic matter content and tests for multivariate geopolymer composites with the addition of waste material.

Chemical interactions and mixtures in public health risk assessment: An analysis of ATSDR's interaction profile database.

The Agency for Toxic Substances and Disease Registry (ATSDR) develops interaction profiles using binary weight of evidence (BINWOE) methodology to determine interaction directions of common environmental mixtures. We collected direction of interactions, BINWOE score determination, and BINWOE score confidence rating from 13 interaction profiles along with toxicodynamic and toxicokinetic influences on interaction direction. By doing so, we quantified the 1) direction of interaction and indeterminate evaluations; 2) characterized confidence in the BINWOE determinations; and 3) quantified toxicokinetic/toxicodynamic, and other influences on projected BINWOE interaction directions.

DNAzymes for amine and peptide lysine acylation.

DNAzymes were previously identified by in vitro selection for a variety of chemical reactions, including several biologically relevant peptide modifications. However, finding DNAzymes for peptide lysine acylation is a substantial challenge. By using suitably reactive aryl ester acyl donors as the electrophiles, here we used in vitro selection to identify DNAzymes that acylate amines, including lysine side chains of DNA-anchored peptides.

Evaluation of ATSDR's MRL and EPA's RfCs/RfDs: Similarities, Differences, and Rationales.

Objectives: The Agency for Toxic Substances and Disease Registry (ATSDR) and the Environmental Protection Agency (EPA) derive minimal risk levels (MRLs) and reference concentrations and doses (RfCs and RfDs), respectively, for environmental contaminants to help identify potential health risks to exposed populations. MRLs, RfDs, and RfCs involve similar derivation methods, but the values sometimes differ for the same chemical. The objectives of this manuscript are to quantitatively assess similarities and differences between MRLs, RfCs, and RfDs, qualitatively describe how a number of factors can influence the development of the health guidance values (HGVs) and identify ongoing collaborations and opportunities for increased coordination of efforts.

Age and sex differences in hearing loss association with depressive symptoms: analyses of NHANES 2011-2012.

Background: Depression is a common and significant health problem. Hearing loss is the third most common chronic physical condition in the USA and might be a factor in depression. To determine whether hearing loss is associated with depressive symptoms in US adults ages 20-69 years.