Search results for "TRIM"
showing 10 items of 1942 documents
Calculation of the pH and the titratable acidity in clinically used infusion solutions.
2006
Clinically used infusion solutions are complex aqueous mixtures composed of a variety of different salts, acids, and non-electrolytes, and are characterized by composition, initial pH, and titratable acidity (TA). By rigorous treatment as a multi-composed acid-base system, pH and TA were calculated from proton dissociation equilibria, mass balance equations and electroneutrality condition. Nine were arbitrarily chosen as model solutions in which pH and TA were experimentally determined. From composition, and based on a set of apparent acidity constants (pK values) at 37 degrees C and total ionic strength 0.155 mol/l, pH was calculated by iteration. In the model solutions, measured pH was in…
Electrochemical molecular recognition of silver cation by electropolymerised thieno[3′,4′:5,6][1,4]dithiino[2,3-b]quinoxaline: a joint experimental a…
2000
The novel annelated monomer thieno[3′,4′:5,6][1,4]dithiino[2,3-b]quinoxaline 1 has been electropolymerised on a variety of electrodes, resulting in films which are electroactive in non-aqueous and aqueous solution. The polymer films exhibit a transformation in voltammetric response corresponding to a positive shift in redox potential in the presence of silver cation, the maximum shift being ca. 150 mV in acetonitrile and ca. 400 mV in aqueous LiClO4 solution. Mercury dication demonstrates a similar, but smaller (ca. 130 mV) shift in aqueous solution. Theoretical calculations clearly show the potential of poly(1) as a metal complexation agent. The Ag+ ion coordinates with 1 in two ways: (i) …
Thermodynamics of transfer of some nitroalkanes from aqueous to dodecyltrimethylammonium bromide micellar phases
1988
Abstract The enthalpies of mixing of some aqueous n-nitroalkane solutions with dodecyltrimethylammonium bromide micellar solutions were determined. The experimental data were treated by using a previously reported approach giving the enthalpies of transfer of solute from the aqueous to the micellar phases and the distribution constant of solute between the two phases at the same time. From these, the standard thermodynamic quantities of transfer (ΔtrfG°, ΔtrfH° and ΔtrfS°) are derived. In order to study the effect of the nature of both the solvent and the head group of solute, these properties are compared with those from water to octane and with those of alcohols and nitriles from aqueous …
Ab Initio Liquid Water Dynamics in Aqueous TMAO Solution
2015
Ab initio molecular dynamics (AIMD) simulations in trimethylamine N-oxide (TMAO)-D2O solution are employed to elucidate the effects of TMAO on the reorientational dynamics of D2O molecules. By decomposing the O-D groups of the D2O molecules into specific subensembles, we reveal that water reorientational dynamics are retarded considerably in the vicinity of the hydrophilic TMAO oxygen (O(TMAO)) atom, due to the O-D···O(TMAO) hydrogen-bond. We find that this reorientational motion is governed by two distinct mechanisms: The O-D group rotates (1) after breaking the O-D···O(TMAO) hydrogen-bond, or (2) together with the TMAO molecule while keeping this hydrogen-bond intact. While the orientatio…
Synthesis of 3-substituted isoindolin-1-ones via a tandem desilylation, cross-coupling, hydroamidation sequence under aqueous phase-transfer conditio…
2015
A simple and expedient method for the synthesis of 3-methylene-isoindolin-1-ones 4 under aqueous phase-transfer conditions has been developed. Starting from 2-iodobenzamides 1 and (silyl) alkynes, the products are obtained in high yields and short reaction times (30 min) with the use of inexpensive CuCl/PPh3 catalyst system in the presence of n-Bu4NBr (TBAB) as a phase-transfer agent. Terminal alkynes are conveniently "unmasked" upon in situ desilylation under the reaction conditions. Alkynes possessing heterocyclic moieties were also found as amenable substrates. Furthermore, a one-pot process starting from 2-iodobenzamides 1, aryl halides (bromides or iodides) and trimethylsilylacetylene …
Une application du principe de loyauté procédurale
2022
(Civ. 1re, 9 févr. 2022, no 21-11.253, FS-B, Sté Tagli'Apo et a. c/ Amrest Holdings SE, D. 2022. 358 ; Rev. arb. 2022. 309, note Ch. Jarrosson)
A partire dalla manutenzione: strategie per i siti archeologici
2010
A dieci anni dal Regolamento attuativo della Legge Merloni, il contributo punta ad aggiornare lo stato dell’arte sulla manutenzione dei siti archeologici. Nonostante i numerosi passi avanti, il quadro mostra ancora alcune ambiguità, mentre molti siti continuano a versare in condizioni precarie. La limitatezza delle risorse disponibili, tanto più grave pensando alla vastità del patrimonio culturale, per molto tempo ha costituito un alibi per trascurare la manutenzione. Invece essa costituisce un incentivo per una più efficiente gestione. Si tratta: dell’ambiguità del rapporto manutenzione/conservazione, dei paradossi normativi e dei limiti della programmazione, della specificità della manute…
L’incompletezza del patrimonio architettonico: testimonianze in terra cruda a Solunto
2015
L'incompletezza riassume la maggior parte delle caratteristiche fisiche e immateriali del patrimonio architettonico e produce due conseguenze principali: la sua elevata vulnerabilità e le difficoltà di comprensione. Questo tema offre anche una parola chiave per capire alcune situazioni critiche nei processi di conoscenza, conservazione e valorizzazione sul patrimonio architettonico. Le testimonianze di terra cruda superstiti a Solunto non sono tanto rilevanti per quantità e dimensione, ma forniscono un esempio lampante di questo tema. L’obiettivo di conservare questi pochi lacerti soluntini di architettura in crudo può assumere un maggior senso, se esso si collega, da un lato, alle potenzia…
La fornace di pietra a Marsa Siklah
2013
La fornace Penna, uno dei più interessanti esempi di Archeologia Industriale in Sicilia, è oggi ridotta a un rudere che si avvia ad una inesorabile fine. Le imponenti strutture di calcare perdono di giorno in giorno la loro stabilità statica e si sgretolano precipitando al suolo. Inutili gli appelli, le petizioni, gli allarmi e le richieste di intervento sollevate da più parti. Errori, ritardi burocratici, polemiche e interessi contrastanti hanno reso vani tutti i tentativi di salvare la ‘vecchia signora’. Questo libro è un omaggio all’opera del progettista, un geniale professionista siciliano del secolo scorso, ma anche a tutti coloro che nel corso di questi anni hanno testimoniato nei mod…
El Castellet (Turís, Valencia). Intervención arqueológica dentro del Proyecto de Consolidación y Puesta en Valor del castillo
2012
Resultados de la intervención arqueológica.