Results 31 to 40 of about 167,505 (302)

Production of Active Poly- and Oligosaccharidic Fractions from Ulva sp. by Combining Enzyme-Assisted Extraction (EAE) and Depolymerization

open access: yesMetabolites, 2019
Data on fractionation and depolymerization of the matrix ulvan polysaccharides, and studies on the biological activities on skin cells, are very scarce.
Mathilde Fournière   +5 more
doaj   +1 more source

Bright Side of Lignin Depolymerization: Toward New Platform Chemicals

open access: yesChemical Reviews, 2018
Lignin, a major component of lignocellulose, is the largest source of aromatic building blocks on the planet and harbors great potential to serve as starting material for the production of biobased products. Despite the initial challenges associated with
Zhuohua Sun   +4 more
semanticscholar   +1 more source

A Comparison of Phenolic Monomers Produced from Different Types of Lignin by Phosphotungstic Acid Catalysts

open access: yesChemistryOpen, 2019
Herein we studied the chemical structure of different types of lignin samples and the potential to prepare phenolic monomers was illustrated by phosphotungstic acid catalysts. Different types of H/G/S lignin components had different structures.
Dr. Boyu Du   +3 more
doaj   +1 more source

Physical properties of the cytoplasm modulate the rates of microtubule polymerization and depolymerization

open access: yesDevelopmental Cell, 2022
The cytoplasm is a crowded, visco-elastic environment whose physical properties change according to physiological or developmental states. How the physical properties of the cytoplasm impact cellular functions in vivo remain poorly understood.
Arthur T. Molines   +12 more
semanticscholar   +1 more source

Nano ZnO Catalyst for Chemical Recycling of Polyethylene terephthalate (PET) [PDF]

open access: yesEngineering and Technology Journal, 2017
This paper is focused firstly on production of monomers bis (2-hydroxyethyl) terephthalate (BHET) and oligomers by using Nano zinc oxide with different particle size (55&94) nm with different weight ratio (0.05, 0.15 and 0.5) by using chemical recycling ...
M.A.H Alzuhairi, B.I. Khalil, R.S. Hadi
doaj   +1 more source

The thermodynamics and kinetics of depolymerization: what makes vinyl monomer regeneration feasible?

open access: yesChemical Science, 2023
Depolymerization is potentially a highly advantageous method of recycling plastic waste which could move the world closer towards a truly circular polymer economy. However, depolymerization remains challenging for many polymers with all-carbon backbones.
Victoria Lohmann   +3 more
semanticscholar   +1 more source

Membrane Separation of the Base-Catalyzed Depolymerization of Black Liquor Retentate for Low-Molecular-Mass Compound Production

open access: yesMembranes, 2019
One way of valorizing the lignin waste stream from the pulp and paper industries is depolymerizing it into low-molecular-mass compounds (LMMC). However, a common problem in the depolymerization of Kraft lignin is the low yields of small aromatic ...
Kena Li   +5 more
doaj   +1 more source

Synergistic depolymerization of polymeric proanthocyanidins from Vitis amurensis seeds by catechin and sulfurous acid and their antioxidant activity

open access: yesShipin yu jixie
ObjectiveTo address the problem of low bioavailability of polymeric proanthocyanidins (PPCs).MethodsPPCs extracted, isolated, and purified from Vitis amurensis seeds were used as the raw materials.
LAN Jing   +4 more
doaj   +1 more source

Recent Advances in Mechanochemical Pretreatment of Lignocellulosic Biomass

open access: yesEnergies, 2022
Biorefineries are industrial facilities where biomass is converted into chemicals, fuels and energy. The use of lignocellulose as raw material implies the development of pretreatments to reduce its recalcitrant character prior to the processes that lead ...
Antonio Manuel Pérez-Merchán   +6 more
doaj   +1 more source

Research and progress of chemical depolymerization of waste PET and high-value application of its depolymerization products

open access: yesRSC Advances, 2022
PET (polyethylene terephthalate) has good transparency, corrosion resistance, gas barrier properties and mechanical properties, and is widely used in beverage bottles, fabrics, food packaging, tires, films, engineering plastics and other fields. With the
Fan Cao   +5 more
semanticscholar   +1 more source

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