Effect of pore size of ceramic support on the self-rejection characteristics of the dynamic membrane formed with water soluble proteins in waste water.

A new biomimetic strategy to im prove the self-healing properties of Portland cement is presented that is based on the application of the biogenic inorganic polymer polyphosphate (polyP), which is used as a cement admixture. The data show that synthetic linear polyp, with an average chain length of 40, as well as natural long-chain polyP isolated from soil bacteria, has the ability to support self-healing of this construction material. Furthermore, polyP, used as a water-soluble Na-salt, is subject to Na+/Ca2+ exchange by the Ca2+ from the cement, resulting in the formation of a water-rich coacervate when added to the cement surface, especially to the surface of bacteria-containing cement/concrete samples. The addition of polyP in low concentrations (<1% on weight basis for the solids) not only accelerated the hardening of cement/concrete but also the healing of microcracks present in the material. The results suggest that long-chain polyP is a promising additive that increases the self-healing capacity of cement by mimicking a bacteria-mediated natural mechanism.

Download Full-text

Large Pore Size Nanoporous Materials from the Self-Assembly of Asymmetric Bottlebrush Block Copolymers

Nano Letters ◽

10.1021/nl103747m ◽

2011 ◽

Vol 11 (3) ◽

pp. 998-1001 ◽

Cited By ~ 138

Author(s):

Justin Bolton ◽

Travis S. Bailey ◽

Javid Rzayev

Keyword(s):

Block Copolymers ◽

Pore Size ◽

Self Assembly ◽

Nanoporous Materials ◽

The Self ◽

Large Pore ◽

Large Pore Size

Download Full-text

Colorless and Transparent Polyimide Microporous Film with Excellent Physicochemical Property

Polymers ◽

10.3390/polym13081298 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1298

Author(s):

Jong Won Kim ◽

Seon Ju Lee ◽

Moon Young Choi ◽

Jin-Hae Chang

Keyword(s):

Pore Size ◽

Porous Membrane ◽

Amic Acid ◽

Water Soluble ◽

Poly Vinyl Alcohol ◽

Thermal Stabilities ◽

Blend Films ◽

Hydrogen Bonding Interactions ◽

Heat Treated ◽

Microporous Film

4,4′-(4,4′-isopropylidenediphenoxy)bis(phthalic anhydride) (BPADA) as a dianhydride and bis(3-aminophenyl) sulfone (APS) and bis(3-amino-4-hydroxyphenyl) sulfone (APS-OH) as diamines were used to synthesize two types of poly(amic acid) (PAA). Varying amounts (0–5.0 wt%) of water-soluble poly(vinyl alcohol) (PVA) were mixed with PAA, and the resulting blend was heat-treated at different stages to obtain the colorless and transparent polyimide (CPI) blend films. The synthesized blended film completely removed water-soluble PVA in water. The possibility as a porous membrane according to the pore size varied according to the amount of PVA was investigated. The dispersibility and compatibility of CPI containing APS-OH monomer were higher than those of the APS monomer. This could be attributed to the hydrogen-bonding interactions between the CPI main chains and PVA. Scanning electron microscopy was conducted to characterize the material. The results revealed that the pore size of the CPI blend film increased as the PVA concentration increased. It was confirmed that uniform pores of μm-size were observed in CPI. The thermal stabilities, morphologies, optical properties, and solubilities of two CPIs obtained using APS and APS-OH monomers were investigated and their properties were compared with each other.

Download Full-text

The cellular basis of corneal transparency: evidence for ‘corneal crystallins’

Journal of Cell Science ◽

10.1242/jcs.112.5.613 ◽

1999 ◽

Vol 112 (5) ◽

pp. 613-622 ◽

Cited By ~ 2

Author(s):

J.V. Jester ◽

T. Moller-Pedersen ◽

J. Huang ◽

C.M. Sax ◽

W.T. Kays ◽

...

Keyword(s):

Cellular Level ◽

Soluble Proteins ◽

Water Soluble ◽

Corneal Tissue ◽

Corneal Epithelial Cells ◽

Corneal Epithelial ◽

Corneal Transparency ◽

Scattering Measurements ◽

Class 1

In vivo corneal light scattering measurements using a novel confocal microscope demonstrated greatly increased backscatter from corneal stromal fibrocytes (keratocytes) in opaque compared to transparent corneal tissue in both humans and rabbits. Additionally, two water-soluble proteins, transketolase (TKT) and aldehyde dehydrogenase class 1 (ALDH1), isolated from rabbit keratocytes showed unexpectedly abundant expression (approximately 30% of the soluble protein) in transparent corneas and markedly reduced levels in opaque scleral fibroblasts or keratocytes from hazy, freeze injured regions of the cornea. Together these data suggest that the relatively high expressions of TKT and ALDH1 contribute to corneal transparency in the rabbit at the cellular level, reminiscent of enzyme-crystallins in the lens. We also note that ALDH1 accumulates in the rabbit corneal epithelial cells, rather than ALDH3 as seen in other mammals, consistent with the taxon-specificity observed among lens enzyme-crystallins. Our results suggest that corneal cells, like lens cells, may preferentially express water-soluble proteins, often enzymes, for controlling their optical properties.

Download Full-text

Improvement of Functional Properties of Fish Water Soluble Proteins with Glucose-6-phosphate through the Maillard Reaction

Fisheries Science ◽

10.2331/fishsci.65.618 ◽

1999 ◽

Vol 65 (4) ◽

pp. 618-622 ◽

Cited By ~ 5

Author(s):

Mita Wahyuni ◽

Shoichiro Ishizaki ◽

Munehiko Tanaka

Keyword(s):

Functional Properties ◽

Maillard Reaction ◽

Soluble Proteins ◽

Water Soluble

Download Full-text

Selective Transport of Water-Soluble Proteins from Aqueous to Ionic Liquid Phase via a Temperature-Sensitive Phase Change of These Mixtures

Australian Journal of Chemistry ◽

10.1071/ch12282 ◽

2012 ◽

Vol 65 (11) ◽

pp. 1548 ◽

Cited By ~ 15

Author(s):

Yuki Kohno ◽

Nobuhumi Nakamura ◽

Hiroyuki Ohno

Keyword(s):

Phase Change ◽

Aqueous Phase ◽

Selective Dissolution ◽

Selective Extraction ◽

Soluble Proteins ◽

Water Soluble ◽

Temperature Sensitive ◽

Salting Out ◽

Key Factor ◽

The Difference

Mixtures of some ionic liquids (ILs) and water show reversible phase change between a homogeneous mixture and phase-separated state by a small change in temperature. Some water-soluble proteins have been migrated from the aqueous to the IL phase. When tetrabutylphosphonium 2,4,6-trimethylbenzenesulfonate was used as an IL, cytochrome c (Cyt.c) was found to be extracted from the water phase to the IL phase. Conversely, both horseradish peroxidase (HRP) and azurin remained in the aqueous phase. This selective extraction was comprehended to be due to the difference in solubility of these proteins in both phases. The separated aqueous phase contained a small amount of IL, which induced the salting-out of Cyt.c. On the other hand, condensed IL phase promoted the salting-in of Cyt.c. As a result, Cyt.c was preferably dissolved in the hydrated IL phase rather than aqueous phase. In the case of HRP, there was only a salting-out profile upon increasing the concentration of IL, which induced selective dissolution of HRP in the aqueous phase. These results clearly suggest that the profile of salting-out and salting-in for proteins is the key factor to facilitate the selective extraction of proteins from aqueous to the IL phase.

Download Full-text

Influence of temperature processing on the constitutive and inducible resistance of rye seedlings to chloride salinization

Вестник Пермского университета. Серия «Биология»=Bulletin of Perm University. Biology ◽

10.17072/1994-9952-2021-2-134-140 ◽

2021 ◽

pp. 134-140

Author(s):

L. A. Chudinova ◽

◽

D. R. Yusupov ◽

Keyword(s):

Growth Rate ◽

Sodium Chloride ◽

Protective Effect ◽

Soluble Proteins ◽

Final Concentration ◽

Water Soluble ◽

Thermal Pretreatment ◽

Thermal Hardening ◽

Influence Of Temperature ◽

Inducible Synthesis

We studied the growth rate of rye seedlings, as well as the dynamics of the content of soluble proteins and proline in the shoots during their adaptation to sharp (300 mM NaCl once, exposure time 9 days) and gradual (100 mM NaCl, then 100 mM NaCl after 2 days to the final concentration of 400 mM) salinity with sodium chloride in the presence or absence of thermal hardening (+40°C, 3 h). The established dy-namics of the content of proline and soluble proteins in the shoots suggests that the formation of re-sistance to salinity is determined by the high constitutive level of proline, as well as the stress-inducible synthesis of proline and water-soluble proteins. Thermal pretreatment of the seedlings stimulated their constitutive stability to a greater extent. The detected metabolic changes are obviously related to one of the possible mechanisms of the protective effect of thermal hardening on subsequent salinization.

Download Full-text

Insight into the Self-Assembly of Water-Soluble Perylene Bisimide Derivatives Through a Combined Computational and Experimental Approach

10.26434/chemrxiv.8006564.v1 ◽

2019 ◽

Author(s):

Emily R. Draper ◽

Liam Wilbraham ◽

Dave J. Adams ◽

Matthew Wallace ◽

Martijn Zwijnenburg

Keyword(s):

Density Functional Theory ◽

Self Assembly ◽

Density Functional ◽

Colloidal Stability ◽

Water Soluble ◽

The Self ◽

Functional Theory ◽

Perylene Bisimide ◽

Aggregate Growth ◽

Perylene Bisimides

We use a combination of computational and experimental techniques to study the self-assembly and gelation of water-soluble perylene bisimides derivatised at the imide position with an amino acid. Specifically, we study the likely structure of self-assembled aggregates of the alanine-functionalised perylene bisimide (PBI-A) and the thermodynamics of their formation using density functional theory and predict the UV-vis spectra of such aggregates using time-dependent density functional theory. We compare these predictions to experiments in which we study the evolution of the UV-Vis and NMR spectra and rheology of alkaline PBI-A solutions when gradually decreasing the pH. Based on the combined computational and experimental results, we show that PBI-A self-assembles at all pH values but that aggregates grow in size upon protonation. Gelation is driven not by aggregate growth but reduction of the aggregation surface-charge and a decrease in the colloidal stability of the aggregation with respect to agglomeration.

Download Full-text