نتایج جستجو برای: three levels of ionic strength

تعداد نتایج: 21256218  

Journal: :Physical review letters 2001
Y Zhu S Granick

The effective shear viscosity and frequency-dependent dynamic oscillatory shear spectra of water containing monovalent or divalent ions (ionic strength 25 mM), confined between mica crystals at 1-2 water molecules thickness, oscillated with twist angle with the period expected for the pseudohexagonal surface lattice. The effective viscosity varied by orders of magnitude as the twist angle was c...

2013
Alessia Tempestini Valeria Cassina Doriano Brogioli Roberto Ziano Simona Erba Roberto Giovannoni Maria G. Cerrito Domenico Salerno Francesco Mantegazza

The opening of DNA double strands is extremely relevant to several biological functions, such as replication and transcription or binding of specific proteins. Such opening phenomenon is particularly sensitive to the aqueous solvent conditions in which the DNA molecule is dispersed, as it can be observed by considering the classical dependence of DNA melting temperature on pH and salt concentra...

ژورنال: :international journal of new chemistry 0

the complexation of zinc (ii) with dopamine has been investigated by spectrophotometric measurements in mixed solvent system at an ionic strength of 0.2 mol*dm-3 sodium chloride, employed (25± 0.1° c) at ph ranges of ~6 to ~7 with a high ratio of ligand to metal.

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2015
V Iarko E Werner L K Nyberg V Müller J Fritzsche T Ambjörnsson J P Beech J O Tegenfeldt K Mehlig F Westerlund B Mehlig

The extension of DNA confined to nanochannels has been studied intensively and in detail. However, quantitative comparisons between experiments and model calculations are difficult because most theoretical predictions involve undetermined prefactors, and because the model parameters (contour length, Kuhn length, effective width) are difficult to compute reliably, leading to substantial uncertai...

Journal: :Physical review letters 2009
Jason W Merrill Sunil K Sainis Eric R Dufresne

Electrostatic forces between small groups of colloidal particles are measured using blinking optical tweezers. When the electrostatic screening length is longer than the interparticle separation, forces are found to be non-pairwise-additive. Both pair and multiparticle forces are well described by the linearized Poisson-Boltzmann equation with constant potential boundary conditions. These findi...

Journal: :Chemical communications 2006
Jianhua Zhou Geng Wang Jianqiang Hu Xianbo Lu Jinghong Li

A reversible electrochemical switching has been displayed at smart polymer brush interfaces, which was responsive to temperature, ionic strength and pH stimuli, independently or simultaneously.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده ریاضی و کامپیوتر 1389

the concepts of similarity and dissimilarity have been the interest of many researchers. basically, in the studies the similarity between two objects or phenomena, has been discussed. in this thesis, we consider the case when the resemblance or similarity among three objects or phenomena of a set, 3-similarity in our terminology, is desired. later we will extend our definitions and propos...

Farahnaz Soleimani Farrokh Gharib Hossein Aghaie

The hydrolysis of cadmium nitrate was studied spectrophotometrically at different ionic strengthsof sodium perchlorate in a wide pH range, 1-12, and at 25 C. Least squares calculations areconsistent with the formation of M(OH)+, M(OH)2, M(OH)3- and M(OH)42- species, which M isCd2+. The dependency on ionic strength in the background electrolyte solutions was taken intoaccount by using a Debye-Hu...

Journal: :Nucleic acids research 1979
W O Weischet

Histone H 1-depleted chromatin made from acid extracted, intact nuclei was exposed to various ionic strengths. NaCl concentrations above 0.3 M sufficed to generate novel oligonucleosomes formerly characterized as "compact oligomers" and "spacerless dinucleosomes". Such particles could not be identified within H 1-depleted nuclei or chromatin at low ionic strengths. Their formation, proceeding w...

Journal: :Chemical Society reviews 2014
G Chatel D R MacFarlane

Ionic liquids, as reaction media, and sonochemistry are two recently developing fields of chemistry that present some similarities. Firstly, they constitute separately unconventional approaches to reaction chemistry that, in many cases, generate improvements in yield, rate and selectivity compared to classical chemistry, or even change the mechanisms or products expected. In addition, both are ...

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