Results 61 to 70 of about 13,676 (263)

Parametric Study on Synthesis of Carboxyl Methyl Cellulose from Ozone Pre-Treated Empty Fruit Bunch Using Fractional Factorial Design Study

open access: yesChemical Engineering Transactions, 2023
Carboxyl methyl cellulose (CMC) is a cellulose derivative that is being used in many industries such as food packaging. This study evaluates the parameter region i.e., NaOH concentration, sodium monochloroacetate (SMCA) ratio, etherification temperature,
Makam Mba Michele Raissa   +4 more
doaj   +1 more source

Recent Developments in the Field of Air‐Stable Nickel(0) Precatalysts for Cross‐Coupling Reactions

open access: yesEuropean Journal of Inorganic Chemistry, EarlyView.
The development of bench‐stable Ni(0) sources aims to replace air‐sensitive [Ni(COD)2] (cod = cycloocta‐1,5‐diene) with easy‐to‐handle alternatives. Through a targeted ligand design, using electron‐deficient dienes, carbenes, and fluorophosphines, researchers have achieved air‐ and moisture‐tolerant complexes that show high catalytic activity in cross ...
Franziska Flecken, Schirin Hanf
wiley   +1 more source

Aldehyde-containing urea-absorbing polysaccharides [PDF]

open access: yes, 1977
A novel aldehyde containing polymer (ACP) is prepared by reaction of a polysaccharide with periodate to introduce aldehyde groups onto the C2 - C3 carbon atoms.
Hsu, G. C.   +2 more
core   +1 more source

Effect of Molar Substitution on the Properties of γ-Hydroxypropyl Starch

open access: yesMolecules, 2022
A new type of hydroxyalkyl starch, γ-hydroxypropyl starch (γ-HPS), was prepared by etherification of alkali-activated starch with 3-chloropropanol. The reaction efficiency, morphological change, thermodynamic and apparent viscosity properties, and other ...
Xue-Li Liu   +5 more
doaj   +1 more source

Ring Formation in Sesquiterpene Synthesis: Biomimetic vs. Non‐Biomimetic Strategies

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
A short review of cyclase enzyme‐mediated ring formation in sesquiterpene biosynthesis is presented as a prelude to six case studies examining the merits and demerits of biomimetic vs. non‐biomimetic strategies for carbocyclisation in the total synthesis of this iconic natural product class.
Bohan Lin, Chen Dai, Alan C. Spivey
wiley   +1 more source

Cellulose Ethers from Banana (Musa balbisiana Colla) Blossom Cellulose: Synthesis and Multivariate Optimization

open access: yesIndonesian Journal of Chemistry
Cellulose ethers are biocompatible polymers which have attracted considerable attention for various applications due to their physical and mechanical properties.
Safira Zidna Salama   +2 more
doaj   +1 more source

Enhanced Hydrogenation of Cyclohexanone: A Multi‐Scale Investigation Into Noncatalytic and Catalytic Pathways Towards Sustainable Conversion

open access: yesEnergy Science &Engineering, EarlyView.
ABSTRACT The selective hydrogenation of oxygenated compounds is crucial for the conversion of biocrude into platform chemicals. However, the presence of stable oxygenated species, cyclohexanone, in biocrude limits possess a challenge for easy conversion process.
Ishaq Kariim   +4 more
wiley   +1 more source

Sulfonic Acid Functionalization of Different Zeolites and Their Use as Catalysts in the Microwave-Assisted Etherification of Glycerol with tert-Butyl Alcohol

open access: yesMolecules, 2017
The etherification of glycerol with tert-butyl alcohol in the liquid phase, over different sulfonic acid functionalized zeolites, has been studied. The reaction was carried out using microwaves as a way of heating, measured at autogenous pressure and ...
Rafael Estevez   +3 more
doaj   +1 more source

Water‐Holding Capacity Regulation of Dietary Fibers in Soybean Residue: From Modification Strategies, to Function Improvement and Food Texture Optimization

open access: yesFood Frontiers, EarlyView.
Soybean residue exhibits poor water holding capacity (WHC) due to high insoluble dietary fiber (>95%). Modification strategies (physical, biological, and chemical) enhance WHC by altering fiber structure/function, enabling optimized food texture and functional food development in meat, bakery, dairy, and other food systems.
Zhengyang Cheng   +7 more
wiley   +1 more source

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