scholarly journals Replacing a single atom accelerates the folding of a protein and increases its thermostability

2016 ◽  
Vol 14 (28) ◽  
pp. 6780-6785 ◽  
Author(s):  
Ulrich Arnold ◽  
Ronald T. Raines
Keyword(s):  
Substantial Effect ◽  
Single Atom ◽  
Native Structure ◽  
The Stability ◽  
Polypeptide Chains

The conformational attributes of proline can have a substantial effect on the folding of polypeptide chains into a native structure and on the stability of that structure.

Modulating the stability, electronic and reactivity properties of single-atom catalyst anchored graphene by coordination environments

2022 ◽  
Vol 135 ◽  
pp. 114975
Author(s):  
Weiguang Chen ◽  
Yanan Tang ◽  
Hongwei Zhang ◽  
Jinlei Shi ◽  
Zhiwen Wang ◽  
...  
Keyword(s):  
Single Atom ◽  
The Stability

Extendable Machine Learning Model for the Stability of Single Atom Alloys

2020 ◽  
Vol 63 (7-8) ◽  
pp. 728-741 ◽  
Author(s):  
Karun K. Rao ◽  
Quan K. Do ◽  
Khoa Pham ◽  
Debtanu Maiti ◽  
Lars C. Grabow
Keyword(s):  
Machine Learning ◽  
Learning Model ◽  
Single Atom ◽  
Machine Learning Model ◽  
The Stability ◽  
Single Atom Alloys

Magnetomechanical Instabilities in Elastic-Plastic Cylinders, Part I: Elastic Response

1996 ◽  
Vol 63 (3) ◽  
pp. 734-741 ◽  
Author(s):  
D. L. Littlefield
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Fields ◽  
Threshold Value ◽  
Substantial Effect ◽  
Elastic Response ◽  
Linear Perturbation ◽  
Azimuthal Magnetic Field ◽  
Physical Mechanisms ◽  
Linear Perturbation Theory ◽  
The Stability

The effects of electromagnetic fields on instabilities in metal cylinders are considered in this analysis. The cylinder is assumed to be infinitely long and perfectly conducting. An axial electric current is introduced in the cylinder, giving rise to an azimuthal magnetic field in the surrounding vacuum, causing mechanical distortion in the cylinder. The current is assumed to be small so that the deformation remains elastic; in an accompanying paper (Littlefield, 1996) larger currents are considered where plastic flow becomes important. After solutions to the idealized motion of the cylinder under uniaxial strain conditions are developed, small perturbations to the motion are considered. The equations governing the motion of these disturbances are derived using linear perturbation theory. Solutions to the equations indicate that electromagnetic fields can have a substantial effect on the stability spectrum in the cylinder. In general, the frequency of oscillating perturbations is suppressed by the azimuthal magnetic field, and distending instabilities are possible if the magnetic field is above a threshold value. The underlying physical mechanisms contributing to these deviations are proposed.

scholarly journals Effect of disulphide bonds and sulphhydryl concentrations on properties of wheat flour

2020 ◽  
Vol 38 (No. 5) ◽  
pp. 265-272
Author(s):  
Li Cuicui ◽  
Lu Qiyu
Keyword(s):  
Development Time ◽  
Loss Modulus ◽  
Substantial Effect ◽  
Sodium Sulphite ◽  
Disulphide Bonds ◽  
Scanning Frequency ◽  
The Stability ◽  
Starch Gelatinisation ◽  
Stability Time ◽  
Dough Development Time

Disulphide bonds and sulphhydryl concentrations were evaluated to determine the effects on rheological, thermodynamic, pasting, and dynamic rheological characteristics of mixed flours. Gluten samples, first treated with sodium sulphite of different concentrations, were added into flour at a 4% level, which had a significant impact on free sulphhydryl, disulphide bonds, and the ratio of the two indices. There was no relevance between the ratio and other parameters except for free sulphhydryl. The mixed flour doughs had reduced water absorption, dough development time, dough stability time as well as degree of weakening (P < 0.05). Disulphide bonds were associated negatively with the rate of starch gelatinisation (C3–C2), peak, and setback and these characteristics were correlated strongly with dough development time, dough stability time, and progressive protein weakening (C2–C1). The stability of starch gelatinisation and cooking stability of mixed flours did not remain significantly different. The larger the concentration of sodium sulphite, the higher the peak, breakdown, final viscosity, and setback values, but there were no significant differences between samples. For all samples, storage modulus and loss modulus increased with increasing scanning frequency. For mixed doughs, the trend lines of moduli decreased with increasing levels of reduction in added gluten. There was no substantial effect on thermal properties of flours.

scholarly journals Modulation of Mo-Fe-C sites over mesoscale diffusion-enhanced hollow sub-micro reactors toward boosted electrochemical water oxidation

2021 ◽  
Author(s):  
Feilong Gong ◽  
Mengmeng Liu ◽  
Lihua Gong ◽  
Sheng Ye ◽  
Qike Jiang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Theoretical Calculations ◽  
Single Atom ◽  
Element Simulation ◽  
The Stability ◽  
Micro Reactors ◽  
Kinetics Of ◽  
Micro Reactor ◽  
Better Than ◽  
Diffusion Properties

Abstract Simultaneously engineering the mesoscale mass transfer and surface reactions on the electrode can promote the kinetics of oxygen evolution reaction (OER). Herein, we report the simultaneously modulation of the mesoscale diffusion and Mo-Fe-C sites formation over monodispersed hollow Fe@MoS2-C sub-micro reactors for boosted OER performance. According to finite element simulation and analysis, the hollow nanostructured MoS2-C host possessed much better mesoscale diffusion properties than its solid and yolk–shell counterparts. Notably, the sulfur vacancies and intercalated carbon in the sub-micro reactor offered a unique microenvironment for Fe anchoring on Mo-Fe-C sites. The stability and activity of the sites were revealed by theoretical calculations. The resultant Fe@MoS2-C presented an OER overpotential of 194 mV, which is much better than those of the Fe-based single-atom catalysts reported to data. Our monodispersed sub-micro reactor combined the advantage of mesoscale diffusion and single-atom sites, and it may have broad prospects for complex electrocatalytic reactions.

scholarly journals Theoretical Approach To Predict the Stability of Supported Single-Atom Catalysts

ACS Catalysis ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 3289-3297 ◽  
Author(s):  
Ya-Qiong Su ◽  
Yifan Wang ◽  
Jin-Xun Liu ◽  
Ivo A.W. Filot ◽  
Konstantinos Alexopoulos ◽  
...  
Keyword(s):  
Theoretical Approach ◽  
Single Atom ◽  
The Stability

The Stability of Sulfur Stabilized Pt Single Atom Electroatalyst

2020 ◽  
Vol MA2020-01 (46) ◽  
pp. 2660-2660
Author(s):  
Michael T. Y. Paul ◽  
Florian Dominik Speck ◽  
Francisco Ruiz Zepeda ◽  
Matija Gatalo ◽  
Nejc Hodnik ◽  
...  
Keyword(s):  
Single Atom ◽  
The Stability

scholarly journals The Stability of High Metal-Loading Pt1/Fe2O3 Single-Atom Catalyst Under Different Gas Environment

2017 ◽  
Vol 23 (S1) ◽  
pp. 1898-1899 ◽  
Author(s):  
Jingyue Liu ◽  
Sibin Duan ◽  
Rongming Wang
Keyword(s):  
Single Atom ◽  
Metal Loading ◽  
High Metal ◽  
Gas Environment ◽  
The Stability

scholarly journals Convective stability of carbon sequestration in anisotropic porous media

2014 ◽  
Vol 470 (2170) ◽  
pp. 20140373 ◽  
Author(s):  
A. A. Hill ◽  
M. R. Morad
Keyword(s):  
Porous Media ◽  
Reaction Rate ◽  
Diffusion Rate ◽  
Solute Concentration ◽  
Substantial Effect ◽  
Anisotropic Porous Media ◽  
Order Chemical Reaction ◽  
Anisotropic Porous Medium ◽  
First Order Chemical Reaction ◽  
The Stability

The stability of convection in an anisotropic porous medium, where the solute concentration is assumed to decay via a first-order chemical reaction, is studied. This is a simplified model for the interactions between carbon dioxide and brine in underground aquifers; the instability of which is essential in reducing reservoir mixing times. The key purpose of this paper is to explore the role porous media anisotropy plays in convective instabilities. It is shown that varying the ratio of horizontal to vertical solutal diffusivites does not significantly affect the behaviour of the instability. This is also the case for changes of permeability when the diffusion rate dominates the solute reaction rate. However, interestingly, when the solute reaction rate dominates the diffusion rate a change in the permeability of the porous material does have a substantial effect on the instability of the system. The region of potential subcritical instabilities is shown to be negligible, which further supports the novel instability behaviour.

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