65 research outputs found

    A systematic study of the isothermal crystallization of the mono-alcohol n-butanol monitored by dielectric spectroscopy

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    Isothermal crystallization of the mono-hydroxyl alcohol n-butanol was studied with dielectric spectroscopy in real time. The crystallization was carried out using two different sample cells at 15 temperatures between 120 K and 134 K. For all temperatures, a shift in relaxation times to shorter times was observed during the crystallization process, which is characterized by a drop in relaxation strength. The two different sample environments induced quite different crystallization behaviors, consistent and reproducible over all studied temperatures. An explanation for the difference was proposed on the background of an Avrami and a Maxwell-Wagner analysis. Both types analysis suggest that the morphology of the crystal growth changes at a point during the crystallization. The differences between the cells can be explained by this transition taking place at different times for the two cells

    Failure : Perspectives and prospects in marketing and consumption theory

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    Author's accepted version (postprint).This is an Accepted Manuscript of an article published by Sage in Marketing Theory on 11/02/2021.Available online: https://journals.sagepub.com/doi/pdf/10.1177/1470593121992539Failure is ubiquitous in popular and consumer culture. In this commentary, we interrogate discourses around failure and outline potential avenues of inquiry for the marketing and consumption theory disciplines. We begin by synthesizing how failure has hitherto been conceptualized in marketing theory. Then, we discuss how recent rethinking of failure in other disciplines can be meaningful for marketing thought, and propose a new agenda for marketing scholars for studying failure, that moves beyond studying failure as a primarily destructive phenomenon that arises predominantly in service encounters.acceptedVersio

    RNA expression patterns in serum microvesicles from patients with glioblastoma multiforme and controls

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    <p>Abstract</p> <p>Background</p> <p>RNA from exosomes and other microvesicles contain transcripts of tumour origin. In this study we sought to identify biomarkers of glioblastoma multiforme in microvesicle RNA from serum of affected patients.</p> <p>Methods</p> <p>Microvesicle RNA from serum from patients with de-novo primary glioblastoma multiforme (N = 9) and normal controls (N = 7) were analyzed by microarray analysis. Samples were collected according to protocols approved by the Institutional Review Board. Differential expressions were validated by qRT-PCR in a separate set of samples (N = 10 in both groups).</p> <p>Results</p> <p>Expression profiles of microvesicle RNA correctly separated individuals in two groups by unsupervised clustering. The most significant differences pertained to down-regulated genes (121 genes > 2-fold down) in the glioblastoma multiforme patient microvesicle RNA, validated by qRT-PCR on several genes. Overall, yields of microvesicle RNA from patients was higher than from normal controls, but the additional RNA was primarily of size < 500 nt. Gene ontology of the down-regulated genes indicated these are coding for ribosomal proteins and genes related to ribosome production.</p> <p>Conclusions</p> <p>Serum microvesicle RNA from patients with glioblastoma multiforme has significantly down-regulated levels of RNAs coding for ribosome production, compared to normal healthy controls, but a large overabundance of RNA of unknown origin with size < 500 nt.</p

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