Synthesis and properties of graphene and graphene/carbon nanotube-reinforced soft magnetic FeCo alloy composites by spark plasma sintering

The effect of the addition of graphene nanoplatelets (GNP) and graphene nanoplatelet/carbon nanotube (GNT) mixtures on the mechanical and magnetic properties of spark plasma sintered soft magnetic FeCo alloys was studied. Three different volume fractions (0.5, 1 and 2 vol%) of GNPs and GNTs were investigated. Ball milling was used to disperse the GNPs in monolithic FeCo powder, while magnetic stirring and ultrasonic agitation were used to prepare hybrid GNT prior to ball milling. The highest saturation induction (B sat) of 2.39 T was observed in the 1 vol% GNP composite. An increase in the volume fraction of the ordered nanocrystalline structure was found to reduce the coercivity (H c) of the composites. The addition of CNTs to the GNP composite prevented grain growth, leading to grain refinement. An 18 % increase in hardness was observed in the 1 vol% GNP composite as compared to the as-received FeCo alloy. A reduction in tensile strength was observed in all of the composite materials, except for the 0.5 vol% GNT composite, for which a value of 643 MPa was observed. Raman spectroscopy indicated a reduction in the defect density of the GNPs after adding CNTs

Influence of grape flesh on the retention and composition of Polyphenols from skins and seeds

This study examined the impact of grape flesh polysaccharide, protein, and amino acid contents on polyphenol retention from skins and seeds in Pinot noir (Vitis vinifera) and cold-hardy interspecific cultivars Marquette and Frontenac (Vitis spp.). After isolating grape tissues (skin, seed, and flesh), they were soaked either individually or combined with other tissues in a wine-like solution for up to 7 days. Findings revealed that flesh significantly reduces the concentration of condensed tannin, and mono- and diglucoside forms of anthocyanins in the supernatants, due to its rich content in polysaccharides and proteins. Frontenac skin and flesh tissues were the main sources of soluble proteins, amino acids, and soluble polysaccharides. Surprisingly, Marquette exhibited a higher retention of skin tannin than Pinot noir, likely due to its smaller tannin molecular mass, and a potential competitive effect with anthocyanins for the binding sites of flesh

Ethical judgments: what do we know, where do we go?

Investigations into ethical judgments generally seem fuzzy as to the relevant research domain. We first attempted to clarify the construct and determine domain parameters. This attempt required addressing difficulties associated with pinpointing relevant literature, most notably the varied nomenclature used to refer to ethical judgments (individual evaluations of actions' ethicality). Given this variation in construct nomenclature and the difficulties it presented in identifying pertinent focal studies, we elected to focus on research that cited papers featuring prominent and often-used measures of ethical judgments (primarily, but not exclusively, the Multidimensional Ethics Scale). Our review of these studies indicated a preponderance of inferences and conclusions unwarranted by empirical evidence (likely attributable at least partly to inconsistent nomenclature). Moreover, ethical judgments related consistently to few respondent characteristics or any other variables, emergent relationships may not always be especially meaningful, and much research seems inclined to repetition of already verified findings. Although we concluded that knowledge about ethical judgments seems not to have advanced appreciably after decades of investigation, we suggested a possible path forward that focuses on the content of what is actually being judged as reflected in the myriad of vignettes used in the literature to elicit judgments