Results 61 to 70 of about 5,911 (183)

THE SULFONATION STUDY OF REACTION MECHANISM ON PAPAVERINE ALKALOID BY GC-MS AND FT-IR

Indonesian Journal of Chemistry, 2010
The aim of this research was to prove theoretical mechanism reaction on the sulfonation of papaverine alkaloid and the result could be used as a reference on the transformation of these alkaloid to the other derivatives.
I Made Sudarma
doaj   +1 more source

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

Efficient Membranes Made of a Nanohybrid of Fluorine‐Doped Carbon Dots Coupled With Metal Organic Framework for High‐Performance Vanadium Redox Flow Battery

Advanced Functional Materials, Volume 36, Issue 45, 5 June 2026.
A sulfonated poly(ether ether ketone)‐based hybrid membrane is fabricated with fluorine‐doped carbon dot (FCD) and functionalized metal organic framework (MIL−101−NH2). The novel design reduces unwanted ion crossover while maintaining a sufficient proton transport pathway.
Tan Trung Kien Huynh, Nayanthara P. S., Muhammad Fawad Khan, Tong Yang, Zijian Cai, Saveen Senanayake, Yang Yang, Jiaye Ye, Hongxia Wang   +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  

SYNTHESIS OF POROUS CARBON MATERIAL PROPYLENE MEDICAL MASK AS ADSORBENT HEAVY METAL IRON (Fe) IN WATER EX-TIN MINING BANGKA BELITUNG

Jurnal Kimia Riset
Bangka Belitung Islands Province faces severe environmental challenges, exacerbated by illegal tin mining activities leading to heightened pollution levels, particularly in stagnant water within former tin mining holes, reaching depths of up to 40 meters.
Addela Amelia, Faizah Alivia Putri, Widia, Della Adelia, Alkasiyah, Verry Andre Fabiani   +5 more
doaj   +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

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

Kinetic of Adsorption Process of Sulfonated Carbon-derived from Eichhornia crassipes in the Adsorption of Methylene Blue Dye from Aqueous Solution

Bulletin of Chemical Reaction Engineering & Catalysis, 2019
The evaluation of kinetic adsorption process of sulfonated carbon-derived from Eichhornia crassipes in the adsorption of methylene blue dye from aqueous solution has been carried out. The sulfonated carbon-derived from E. crassipes (EGS-600) was prepared
Mukhamad Nurhadi, Iis Intan Widiyowati, Wirhanuddin Wirhanuddin, Sheela Chandren   +3 more
doaj   +1 more source

UiO-66 with Both Brønsted and Lewis Acid Sites for Catalytic Synthesis of Biodiesel

Molecules
In the present study, an acid catalyst (UiO-66-SO3H) with Brønsted and Lewis acid sites was synthesised for the preparation of highly efficient biodiesel from oleic acid and methanol using chlorosulphonic acid sulfonated metal–organic frameworks (UiO-66)
Yu Wang, Zhimin Yang, Xichang Wu, Wenxuan Quan, Qi Chen, Anping Wang   +5 more
doaj   +1 more source

Characterization of Expulsion, Cell Viability, and Bacterial Attachment of Enhanced Sulfonated Hydrothermally Treated PEEK Surfaces for Implant Applications

Applied Sciences
Porosity and roughened surfaces of implant materials have been shown to lead to improved cellular attachment and enhanced osseointegration. These topography changes in the surface also aid in the mechanical interlocking of the material to the bone ...
Kadie Nobles, Amol V. Janorkar, Michael D. Roach, Mary E. Marquart, Randall Scott Williamson   +4 more
doaj   +1 more source