The design and synthesis of a novel acid-degradable polyethylene glycol-based N-hydroxysuccinimide (NHS) ester-activated crosslinker is reported. reactive towards nucleophiles features central ketal functional group that stable at pH > 7.5 rapidly hydrolyses 6.0. used to (i) fabricate polysaccharide hydrogels exhibit controlled degradation upon exposure an acidic environment or via endogenous e...

BACKGROUND The bioconversion of cellulose into simple sugars or chemicals has attracted extensive attention in recent decades. The crystal allomorphs of cellulose are key factor affecting cellulose saccharification. However, due to the influence of lignin, hemicelluloses, and different characterization methods in the literature, the effect of cellulose allomorphs on cellulose saccharification i...

cellulolytic complex are enzymes capable of hydrolyzing cellulose. due to rapid growth in population and industrialization, most countries are required to produce more fuel. production of bioethanol from lignocellulosic biomass is very challenging due to environmental pollution by fossil fuels. cellulases play a significant role in biotechnological processes. the cost of production of cellulase...

-l, Carbon-14 labeled cellulose was fed to rock ptarmigan to provide evidence of cellulose digestion and metabolism. Digestibility of cellulose and energy metabolized by ptarmigan fed a diet of 6 and 30';0 cellulose were determined by a feeding trial. 2. Recovery of t'~CO2 in expired gases from ptarmigan fed t*C labeled cellulose demonstrates the digestion and metabolism of cellulose by gut mic...

An earlier safety assessment of several cellulose polymers has been expanded to include cellulose itself and other cellulose polymers used in cosmetics. In general, these ingredients are modified cellulose polymers formed by reaction with the free hydroxyl groups in cellulose. The number of hydroxyl groups reacting, as well as the nature of the substitute group, largely determine the physical p...

In the present study, the synthesis of diethylene triamine supported on cellulose biopolymer as a biodegradable solid basic heterogeneous catalyst was suggested. Then, the applicability of the synthesized catalyst cellulose bonded N-propyl diethylene triamine (CBPDETA) was tested for the synthesis of oxindole derivatives, an important class of potentially bioactive compounds. A various series o...

X-ray and neutron fiber diffraction has been used to study cellulose as it is converted from its naturally occurring crystal phase, cellulose I, to an activated crystal phase, cellulose IIII, by ammonia treatment. The detailed crystal structures determined for cellulose Iβ, an intermediate ammonia-cellulose I complex, and cellulose IIII, reveal a structural transition pathway: hydrogen bonded s...