Journal ArticleDOI
Hydrogen bonding and the cryoprotective properties of glycerol/water mixtures.
Reads0
Chats0
TLDR
The ability of Glycerol/water mixtures to inhibit ice crystallization is linked to the concentration of glycerol and the hydrogen bonding patterns formed by these solutions, which mimic the strong hydrogen bonding pattern seen in ice, yet crystallization does not occur.Abstract:
Molecular dynamics simulations and infrared spectroscopy were used to determine the hydrogen bond patterns of glycerol and its mixtures with water. The ability of glycerol/water mixtures to inhibit ice crystallization is linked to the concentration of glycerol and the hydrogen bonding patterns formed by these solutions. At low glycerol concentrations, sufficient amounts of bulk-like water exist, and at low temperature, these solutions demonstrate crystallization. As the glycerol concentration is increased, the bulk-like water pool is eventually depleted. Water in the first hydration shell becomes concentrated around the polar groups of glycerol, and the alkyl groups of glycerol self-associate. Glycerol−glycerol hydrogen bonds become the dominant interaction in the first hydration shell, and the percolation nature of the water network is disturbed. At glycerol concentrations beyond this point, glycerol/water mixtures remain glassy at low temperatures and the glycerol−water hydrogen bond favors a more linea...read more
Citations
More filters
Journal ArticleDOI
Mussel-Inspired Adhesive and Conductive Hydrogel with Long-Lasting Moisture and Extreme Temperature Tolerance
TL;DR: In this paper, an adhesive and conductive hydrogel is developed with long-lasting moisture lock-in capability and extreme temperature tolerance, which is formed in a binary-solvent system composed of water and glycerol.
Journal ArticleDOI
Cryopreservation of Human iPS Cell Aggregates in a DMSO-Free Solution-An Optimization and Comparative Study.
TL;DR: The ability to replace DMSO with non-toxic molecules, improve post-thaw cell survival, and reduce sensitivity to undercooling is demonstrated, as well as superior adaptability of the optimized solution to different freezing modalities and unplanned deviations.
Journal ArticleDOI
Biocompatible, self-wrinkled, antifreezing and stretchable hydrogel-based wearable sensor with PEDOT:sulfonated lignin as conductive materials
Qinhua Wang,Xiaofeng Pan,Changmei Lin,Dezhi Lin,Yonghao Ni,Yonghao Ni,Lihui Chen,Liulian Huang,Shilin Cao,Xiaojuan Ma +9 more
TL;DR: In this article, a novel multifunctional organohydrogel sensor was developed based on a poly (acrylic acid) (PAA) skeleton with poly (3,4-ethylenedioxythiophene): sulfonated lignin (PEDOT:SL) as the conductive material and a water/glycerol binary solvent as the dispersion medium.
Journal ArticleDOI
Stable, Strain-Sensitive Conductive Hydrogel with Antifreezing Capability, Remoldability, and Reusability
TL;DR: It is believed that the PGA conductive gel would be used as a novel multifunctional material at subzero temperatures in various fields, such as flexible electrode, sensors, and wearable devices.
Journal ArticleDOI
Bran-induced changes in water structure and gluten conformation in model gluten dough studied by Fourier transform infrared spectroscopy
TL;DR: The impact of bran addition on the state of water and gluten secondary structure in gluten dough was studied using Fourier transform infrared spectroscopy to understand the underlying physical mechanism by which bran impacts dough properties as discussed by the authors.
References
More filters
Journal ArticleDOI
Comparison of simple potential functions for simulating liquid water
TL;DR: In this article, the authors compared the Bernal Fowler (BF), SPC, ST2, TIPS2, TIP3P, and TIP4P potential functions for liquid water in the NPT ensemble at 25°C and 1 atm.
Journal ArticleDOI
Numerical Integration of the Cartesian Equations of Motion of a System with Constraints: Molecular Dynamics of n-Alkanes
TL;DR: In this paper, a numerical algorithm integrating the 3N Cartesian equations of motion of a system of N points subject to holonomic constraints is formulated, and the relations of constraint remain perfectly fulfilled at each step of the trajectory despite the approximate character of numerical integration.
Journal ArticleDOI
CHARMM: A program for macromolecular energy, minimization, and dynamics calculations
Bernard R. Brooks,Robert E. Bruccoleri,Barry D. Olafson,David J. States,S. Swaminathan,Martin Karplus +5 more
TL;DR: The CHARMM (Chemistry at Harvard Macromolecular Mechanics) as discussed by the authors is a computer program that uses empirical energy functions to model macromolescular systems, and it can read or model build structures, energy minimize them by first- or second-derivative techniques, perform a normal mode or molecular dynamics simulation, and analyze the structural, equilibrium, and dynamic properties determined in these calculations.
Journal ArticleDOI
Thermodynamics of protein denaturation. III. Denaturation of ribonuclease in water and in aqueous urea and aqueous ethanol mixtures
John F. Brandts,Linda. Hunt +1 more
Journal ArticleDOI
Red- versus Blue-Shifting Hydrogen Bonds: Are There Fundamental Distinctions?
Steve Scheiner,Tapas Kar +1 more
TL;DR: The OH covalent bond of conventional hydrogen bonds of the OH···O type undergoes a lengthening as a result of the complex formation, and the OH stretching frequency shifts to the red.