Search results for "force"

Water Fluxes in Polymeric Membranes for Desalination via Membrane Distillation

2010

Membrane distillation is an emerging technique for seawater desalination. Hydrophobic polymeric membranes are used to separate the solute‐free water vapour from the hot solution. Vapour fluxes of commercial polymeric membranes were measured in various conditions, i.e. natural and forced convection and vacuum. Vapour fluxes were also predicted with models and compared with experimentals. Higher fluxes were recorded in vacuum conditions.

ChemInform Abstract: Gold(I)-Catalyzed Intermolecular Oxyarylation of Alkynes: Unexpected Regiochemistry in the Alkylation of Arenes.

2010

The reaction between acetylenes and sulfoxides, studied as a test case for gold-catalyzed intermolecular addition, provides the oxyarylation compounds 3 in good yields. Unpredictably, in all cases a single regioisomer arising from the electrophilic aromatic alkylation at the position adjacent to the sulfur atom is obtained instead of the expected Friedel−Crafts regioisomer. A new concerted mechanism based on DFT calculations is proposed to account for the products in this intermolecular gold(I)-catalyzed reaction.

Pressure- and temperature-induced valence tautomeric interconversion in a o-dioxolene adduct of a cobalt-tetraazamacrocycle complex

2001

An electronic switch at the molecular level has been realized by using a class of ionic compounds of the formula [Co(L)(diox)]Y (L = tetraazamacrocyclic ligand, Y = mononegative anion). Such compounds undergo temperature- and pressure-induced intramolecular one-electron transfer equilibria. The transition temperature of interconversion varies with the nature of the counterions Y (Y = PF6, BPh4, I). Surprisingly the effect of the anion on the transition temperature is not only governed by its volume but also by its coulombic interaction.

Mercury beats Minerva? : essays on the accelerating impact of market logic permeating higher education

2015

Cognitive-Behavioural Treatment Package for Teaching Grooming Skills to a Man with an Intellectual Disability

2000

A combination of health education, use of picture cues based on task analyses, a system of least prompts and social reinforcement was applied to teach various grooming skills to a man with a moderate intellectual disability. A multiple baseline design across behaviours was employed to show the effects. The results indicated rapid learning of lacking skills such as tooth brushing, shaving, showering and washing of arms and face.

Self-assembly mechanism based on charge density topological interaction energies

2017

The packing interactions have been evaluated in the context of the self-assembly mechanism of crystal growth and also for its impacts on the aromaticity of the trimesate anion. The structure of ethylammonium trimesate hydrate (1) measured at 100 K and a charge density model, derived in part from theoretical structures, is reported. Theoretical structure factors were obtained from the geometry-optimized periodic wave function. The trimesic acid portion of 1 is fully deprotonated and participates in a variety hydrogen bonding motifs. Topological analysis of the charge density model reveals the most significant packing interactions and is then compared to a complementary analysis performed by …

Quo vadis, internal auditing? A vision for internal auditing in 2030

2023

We aim to respond to calls in international auditing (IA) literature and to the current changes in the IA field by describing the driving forces and vision of the future for IA in the year 2030. The goal was to prompt in-depth discussion informed by the divergent views of experts. As a contribution, we identify three key driving forces: prolific data and its application, globalization and new value chains between organizations. Further, the study reports a vision for the future of IA. By surveying a wide range of stakeholders, including the board, management, internal auditors, teachers and a legislator, we expand on the views in earlier literature regarding IA, IA developments and the appl…

Can the absence of solvation of neutral reagents by ionic liquids be responsible for the high reactivity in base-assisted intramolecular nucleophilic…

2005

[reaction: see text] The kinetics of the rearrangement of the Z-phenylhydrazone of 3-benzoyl-5-phenyl-1,2,4-oxadiazole (1a) into the relevant 4-benzoylamino-2,5-diphenyl-1,2,3-triazole (2a) induced by amines have been studied in two room-temperature ionic liquids (IL-1, [BMIM][BF4] and IL-2, [BMIM][PF6]). The data collected show that the reaction occurs faster in ionic liquids than in other conventional solvents previously studied (both polar or apolar, protic or aprotic). Presumably, this could depend on their peculiar ability to minimize the strong substrate-solvent, amine-solvent and amine-amine interactions occurring in conventional solvents.

Effects of combined and classic training on different isometric rate of force development parameters of leg extensors in female volleyball players: D…

2012

Background: The aim of this study is to verify the effects of the combined and classic training of different isometric rates of force development (RFD) parameters of legs. Materials and Methods: Three groups of female athletes was tested: Experimental group (N = 12), classically trained group (N = 11), and control group (N = 20) of athletes. The isometric "standing leg extension" and "Rise on Toes" tests were conducted to evaluate the maximal force, time necessary time to reach it and the RFD analyzed at 100 ms, 180 ms, 250 ms from the onset, and 50-100% of its maximal result. Results: The maximal RFD of legs and calves are dominant explosive parameters. Special training enhanced the RFD of…

EXPANSION OF GLOBAL RULE BY LAW ENFORCEMENT: COLOMBIA’S EXTRADITION EXPERIENCE, 1999–2017

2018

We argue that transnational criminal law has enacted a global rule by law enforcement agencies, at odds with the rule of law. Mutual legal assistance agreements (MLAA) allow exporting law enforcement practices without proper judicial oversight. Consequently defendants required in extradition are exposed to abuses, as illustrated here with extradition cases from Colombia to the United States of America (USA) in the past decades. Based on the critical review of documental and statistic information coming from official and independent sources in the U.S. and Colombia, this article pinpoints specific shortcomings that affect due process and fair trials in the case of extradited defendants. Conc…