نتایج جستجو برای: exchangeable ions

تعداد نتایج: 140372  

Journal: :Journal of the American Chemical Society 2008
Radhika P Nagarkar Rohan A Hule Darrin J Pochan Joel P Schneider

De novo designed peptides, capable of undergoing a thermally triggered beta-strand-swapped self-assembly event leading to hydrogel formation were prepared. Strand-swapping peptide 1 (SSP1) incorporates an exchangeable beta-strand domain composed of eight residues appended to a nonexchangeable beta-hairpin domain. CD shows that, at pH 9 and temperatures less than 35 degrees C, this peptide adopt...

Journal: :Sustainability 2022

In Malaysia, the main constraints of rice yield and productivity are infertile soils poor management practices because these characterized by low pH, nutrient availability, organic matter, high exchangeable Al Fe ions, due to rainfall hot temperatures. Thus, an incubation study was conducted determine optimum amount calcium silicate (HmbG brand) improve soil electrical conductivity (EC), Al, av...

2006
W. P. KELLEY

As a means of distinguishing between the broad groups of flay minerals, chemical analysis may be a valuable supijlement to other methods, but rarely will it remove the necessity for other methods, X-ray analysis in particular. The twoand three-layer clay minerals may be distinguished by the SiOj • AlzOs ratio or SiOz • sesquioxide ratio, but these ratios do not provide criteria for dividing eit...

Journal: :Magnetic resonance 2021

Abstract. Cross-relaxation terms in paramagnetic systems that reorient rigidly with slow tumbling times can increase the effective longitudinal relaxation rates of protons more than 1 order magnitude. This is evaluated by simulating time evolution nuclear magnetization using a complete rate-matrix approach. The calculations show Solomon dependence on metal–proton distance (as r−6) be incorrect ...

2009
Dmitry Panchenko

We present a detailed proof of the Dovbysh-Sudakov representation for symmetric positive definite weakly exchangeable infinite random arrays, called Gram-de Finetti matrices, which is based on the representation result of Aldous and Hoover for arbitrary (not necessarily positive definite) symmetric weakly exchangeable arrays.

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
benyamin yadali jamaloei riyaz kharrat

this study examines the effects of change in the concentrations of monovalent and divalent ions in the polymer-contained surfactant solution on the macroscopic behavior of viscous-modified surfactant waterflooding in heavy oil reservoirs. salts that are used in this set of floods were sodium chloride, magnesium chloride, and calcium chloride. the results indicate that four different ranges of s...

ژورنال: علوم آب و خاک 2013
حسین پور, علیرضا, رئیسی, فایز, متقیان, حمیدرضا, محمدی, جهانگرد,

Studying the distribution of Zn in the soils allows investigating their mobility and bioavailability. In this research, 10 calcareous soil samples were selected, and sewage sludge-amended (1% w/w) and -unamended (control) soils were incubated for 1 month. Before planting, fractions of Zn were determined, three seeds of wheat were planted in each pot and after 8 weeks, they were harvested. Resul...

Journal: :CoRR 2016
Qiang Zhang

We investigate mechanism design without payments when agents have different types of preferences. Contrary to most settings in the literature where agents have the same preference, e.g. in the facility location games all agents would like to stay close to (or away from) the facility, we demonstrate the limitation of mechanism design without payments when agents have different preferences by int...

2005
J. BROWN FArrH K. BROWN

Eight normotensive and eight essential hypertensive humans were studied when on high and low sodium intake. Total 24-hr exchangeable body sodium, blood volume, serum sodium concentration, hematocrit, body weight, and mean arterial pressures, when the subjects were supine and upright, were measured. Plasma and nonplasma sodium fractions, nonplasma weight, and plasma, cell, and whole blood volume...

2012
N. P. Santhanam M. M. Madiman A. D. Sarwate

Exchangeable random partition processes are the basis for Bayesian approaches to statistical inference in large alphabet settings. On the other hand, the notion of the pattern of a sequence provides a framework for data compression in large alphabet scenarios. Because data compression and parameter estimation are intimately related, we study the redundancy of Bayes estimators coming from Poisso...

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