Search results for "Tact"
showing 10 items of 1313 documents
Measuring the Contact Angle of Individual Colloidal Particles.
1998
The aim of this study was to measure the contact angles of individual colloidal spheres ( solidus in circle 4.4 µm) and compare it to contact angles obtained on similarly prepared planar surfaces. For this purpose the particles were attached to atomic force microscope cantilevers. Then the force between the particle in aqueous medium and an air bubble was measured versus the distance. From the resulting force curves we obtained contact angles and detachment forces of single particles. Contact angles of gold coated silica particles were adjusted between 20 degrees and 100 degrees by self-assembling monolayers from different mixtures of undecanethiols and omega-hydroxy undecanethiols from sol…
Does Childhood Psychological Abuse Contribute to Intimate Partner Violence Victimization? An Investigation Using the Childhood Experience of Care and…
2018
International audience; Although psychological abuse is recognized as a particularly insidious form of child abuse, research on the impact of this type of abuse related to intimate partner violence (IPV) is scant. This study examined the contribution of childhood psychological abuse to IPV in female victims and non-victims. Furthermore, it investigated the role of cumulative abuse in predicting IPV. The study included 38 women victims of IPV and 40 non-IPV women. All participants were investigated using the Childhood Experience of Care and Abuse Interview (CECA); the Revised Conflict Tactics Scale (CTS2) and the IPV History Interview were used to assess IPV in the last year and lifetime, re…
Sino-Italian Encounters in the Late Qing Press (1872–1911)
2020
Through the analysis of the portrait of Italy in late Imperial Chinese press, this paper intends to adopts “a more reflective use of the contact zone as a thinking device”, as malleable conceptual space that allows to analyze the interaction between the two countries in a precarious historical moment, and to explore the scale of power undergoing such dynamics. In order to do so, three aspects of the Sino-Italian encounter and national representation will be explored: Balance of power. At the beginning of the 90’s Marie Louise Pratt’s studies on the asymmetrical encounter among different sociocultural entities resulted in the spatial idea of “contact zone”. Although, Since historians agreed …
Calcium signatures and signaling in cytosol and organelles of tobacco cells induced by plant defense elicitors
2011
Calcium signatures induced by two elicitors of plant defense reactions, namely cryptogein and oligogalacturonides, were monitored at the subcellular level, using apoaequorin-transformed Nicotiana tabacum var Xanthi cells, in which the apoaequorin calcium sensor was targeted either to cytosol, mitochondria or chloroplasts. Our study showed that both elicitors induced specific Ca2+ signatures in each compartment, with the most striking difference relying on duration. Common properties also emerged from the analysis of Ca2+ signatures: both elicitors induced a biphasic cytosolic [Ca2+] elevation together with a single mitochondrial [Ca2+] elevation concomitant with the first cytosolic [Ca2+] p…
53 Human bio-monitoring of epoxy resins and hardeners in the production of rotor: blades
2018
Introduction In a small company producing rotor blades for aviation from carbon composites, epoxy resins based on Novolac and isophorone diamine as hardener are used. Both compounds can be absorbed via skin contact and were shown to be strong skin sensitizers. As a part of risk assessment, the industrial physician prompted a biological monitoring to determine the internal exposure of the workers. Methods 6 workers were identified with potential contact to the hardener and resin. We have collected pre- and post-shift urine samples at the beginning and mid of the work week and analysed them for the concentration of isophoronediamine and bisphenol-f-diglycidylethermetabolites as biomarker for …
Use of protein profiles established by CZE to predict the cultivar of olive leaves and pulps
2014
Intact protein profiles established by CZE have been used to predict the cultivar of olive leaves and pulps. For this purpose, proteins were extracted using a mild enzyme-assisted extraction method, which provided higher protein recoveries and a lower environmental impact than other previously described methods. These extracts were subjected to CZE determination under basic conditions using a BGE composed of 50 mM phosphate, 50 mM tetraborate and 0.1% PVA at pH 9. Nine and 14 common peaks, for leaf and pulp samples, respectively, were identified in the nine cultivars studied in this work. In addition, and using linear discriminant analysis of the CZE data, olive leaf and pulp samples belong…
Target analysis of primary aromatic amines combined with a comprehensive screening of migrating substances in kitchen utensils by liquid chromatograp…
2015
An analytical strategy including both the quantitative target analysis of 8 regulated primary aromatic amines (PAAs), as well as a comprehensive post-run target screening of 77 migrating substances, was developed for nylon utensils, using liquid chromatography-orbitrap-high resolution mass spectrometry (LC-HRMS) operating in full scan mode. The accurate mass data were acquired with a resolving power of 50,000 FWHM (scan speed, 2 Hz), and by alternating two acquisition events, ESI+ with and without fragmentation. The target method was validated after statistical optimization of the main ionization and fragmentation parameters. The quantitative method presented appropriate performance to be u…
Study of conformational effects of recombinant interferon gamma adsorbed on a non-porous reversed-phase silica support.
1995
Abstract Reversed-phase chromatography is a powerful method for separating recombinant interferon γ and one of its analogues differing only by a single amino acid residue. Structural differences of the proteins explain this separation ability as demonstrated from adsorption studies on a non-porous reversed-phase support. To reveal the structural differences occurring in the adsorbed state, two different and independent methods were employed. The variation of the retention with the slope of the linear gradient gave information about the molecular contact area of the protein with the support. For different experimental conditions, these data were correlated with the adsorbent capacities measu…
Evaluation of molecular mass and tacticity of polyvinyl alcohol by non-equilibrium capillary electrophoresis of equilibrium mixtures of a polymer and…
2011
Non-equilibrium capillary electrophoresis of equilibrium mixtures (NECEEM) has been used to characterize polyvinyl alcohol (PVA). Commercial PVA samples with different molecular masses, from M(w)=15 up to 205 kDa, were used. According to the (13)C NMR spectra, the samples also differed in tacticity (stereoregularity). Mixtures of PVA and the anionic azo-dye Congo Red (CR) were injected in the presence of a borate buffer. The electropherograms gave a band and a peak due to the residual PVA-CR complex and the excess dye, respectively, plus a superimposed exponential decay due to the partial dissociation of the complex during migration. The stoichiometry of the PVA-CR complex, q=[monomer]/[dye…