Results 61 to 70 of about 5,961 (198)

Enhancing Enzyme-Mediated Cellulose Hydrolysis by Incorporating Acid Groups Onto the Lignin During Biomass Pretreatment

Frontiers in Bioengineering and Biotechnology, 2020
Lignin is known to limit the enzyme-mediated hydrolysis of biomass by both restricting substrate swelling and binding to the enzymes. Pretreated mechanical pulp (MP) made from Aspen wood chips was incubated with either 16% sodium sulfite or 32% sodium ...
Jie Wu, Richard P. Chandra, Masatsugu Takada, Masatsugu Takada, Li-Yang Liu, Scott Renneckar, Kwang Ho Kim, Chang Soo Kim, Jack N. Saddler   +8 more
doaj   +1 more source

Liver cirrhosis is associated with altered glucocorticoid metabolism related to disease severity

Journal of Internal Medicine, EarlyView.
Abstract Background Liver cirrhosis (LC) is frequently complicated by adrenal dysfunction; however, whether cirrhosis drives the coordinated, pathway‐specific reprogramming of cortisol metabolism remains unclear. Objectives We aimed to characterize axis‐specific alterations in cortisol metabolism in patients with LC, those with adrenal insufficiency ...
Soyeon Park, Min Jeong Park, Hye Won Yang, Jeayeon Park, Su Jong Yu, Seung Shin Park, Man‐Ho Choi, Eun Ju Cho, Jung Hee Kim   +8 more
wiley   +1 more source

Sulfonation and characterization of styrene-indene copolymers for the development of proton conducting polymer membranes

Polímeros, 2012
The aim of this work is to obtain polymer precursors based on styrene copolymers with distinct degrees of sulfonation, as an alternative material for fuel cell membranes.
Cristiane M. Becker, Amanda B. Biagini, Maria M. C. Forte, Sandro C. Amico, José V. C. Vargas, Denise S. Azambuja   +5 more
doaj  

A New Paradigm for Understanding the Rheology and Processability of Poly(p‐Phenylene Terephthalamide) Liquid‐Crystalline Solutions

Journal of Applied Polymer Science, Volume 143, Issue 34, September 10, 2026.
Kevlar is traditionally modeled as a rigid‐rod polymer, yet rheological behavior deviates from this assumption. The review introduces a novel “twist‐tie” entanglement theory for aramid polymer chains in the nematic liquid crystal state, providing a molecular explanation for deviations from rigid‐rod models. Understanding twist‐tie entanglement dynamics
Emma Egli, Jacob L. Pretko, Christopher W. Seay, Steven R. Lustig   +3 more
wiley   +1 more source

Towards Photothermal Acid Catalysts Using Eco-Sustainable Sulfonated Carbon Nanoparticles—Part II: Thermal and Photothermal Catalysis of Biodiesel Synthesis

C
The main goal of this work is to evaluate the ability of sulfonated carbon nanoparticles (SCNs) to induce photothermal catalysis of the biodiesel synthesis reaction (transesterification of natural triglycerides (TGs) with alcohols). Carbon nanoparticles (
María Paula Militello, Luciano Tamborini, Diego F. Acevedo, Cesar A. Barbero   +3 more
doaj   +1 more source

Quantification of Sulfonated Polyacrylamides by SEC‐UV in Produced Water: Validation and Oilfield Case Study

Journal of Applied Polymer Science, Volume 143, Issue 33, September 5, 2026.
Size exclusion chromatography with UV–vis detection, combined with ultrasonication pretreatment, enables sensitive detection and quantification of back‐produced polymer at very low concentrations in produced water. This approach supports reliable polymer monitoring and offers a practical route to improve surveillance of polymer flooding performance ...
Eduardo José Creatto, Luis Maqueira, Daniel da Silva Vicente, Thierry Leblanc, Nathaniel Terra, Lara Arinelli, Aurora Pérez‐Gramatges   +6 more
wiley   +1 more source

Dual‐Functional Sulfonated Nanocellulose for Proton Exchange Membranes With High Proton Conductivity at Low Humidity

ENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 5, September 2026.
A scalable dual‐functional strategy yields simultaneously sulfonated and nanosized cellulose for proton exchange membranes with continuous hydrogen‐bond networks. These sustainable membranes exhibit low‐humidity proton conductivity twofold higher than Nafion 212, providing a robust solution for next‐generation fuel cells.
Nan Li, Sufeng Zhang, Yali Liu, Jinrui Li, Ning Wei, Chaoyang Li, Tanyanyu Wang   +6 more
wiley   +1 more source

Preparation of 5-Bromo-2-naphthol: The Use of a Sulfonic Acid as a Protecting and Activating Group

Molbank, 2009
The preparation of 5-bromo-2-naphthol (4) in three steps from 5-amino-2-naphthol (1) is described. A sulfonic acid group is introduced at the 1-position as an activating and protecting group for the Sandmeyer reaction.
Christopher Abelt, Jillian Hamilton, Renata Everett   +2 more
doaj   +1 more source

Acid Sulfite Pulping of Hemp: Effects of Processing Conditions on Lyocell Pulp Quality

Journal of Polymer Science, Volume 64, Issue 16, Page 3364-3381, 15 August 2026.
Industrial hemp is emerging as a promising renewable source for next‐generation textile fibers. This study evaluates whether acid sulfite pulping can produce hemp‐based dissolving pulp suitable for lyocell manufacturing. While the process is historically linked to increased cellulose accessibility, it did not achieve the low lignin content and ...
Lelia Lawson, Bernardo A. Souto, Wade Chute, Patricia I. Dolez   +3 more
wiley   +1 more source

Dipole‐Engineered Conductive Additives for Ultrastable Interphase Evolution in High‐Areal‐Capacity Silicon Anodes

Advanced Functional Materials, Volume 36, Issue 62, 3 August 2026.
In the work reported herein, dipole‐engineered sulfonated carbon nanofibers enable conductive additives to actively regulate interphase formation in silicon anodes. Polar sulfonyl groups guide electrolyte decomposition to form a compact LiF‐rich interphase while promoting robust integration with silicon.
Song Kyu Kang, Hyeonju Kim, Jeongbin Cho, Minseon Park, Taehun Kim, Seonghun Sin, Won Bae Kim   +6 more
wiley   +1 more source