Utilization of olive tree branch cellulose in synthesis of hydroxypropyl carboxymethyl cellulose

Abdel-Halim, E.S.; Alanazi, Humaid H.; Al‐Deyab, Salem S.

doi:10.1016/j.carbpol.2015.03.037

Cited by 28 publications

(11 citation statements)

References 64 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cellulosic materials like agricultural wastes and crop by-products (corn stover, wheat straw, bagasse, etc) are the most abundant polysaccharides in nature and represent the most valuable source of renewable energy1. Thus efficient utilization of cellulose biomass has been attracting attentions worldwide for the sustainable development and eco-efficiency234. Cost-effective process of enzymatic hydrolysis requires low production cost and highly active enzymes with great inhibitor tolerance and synergistic actions.…”

mentioning

confidence: 99%

Functional diversity of family 3 β-glucosidases from thermophilic cellulolytic fungus Humicola insolens Y1

Xia

Bai

Cui

et al. 2016

Sci Rep

View full text Add to dashboard Cite

The fungus Humicola insolens is one of the most powerful decomposers of crystalline cellulose. However, studies on the β-glucosidases from this fungus remain insufficient, especially on glycosyl hydrolase family 3 enzymes. In the present study, we analyzed the functional diversity of three distant family 3 β-glucosidases from Humicola insolens strain Y1, which belonged to different evolutionary clades, by heterogeneous expression in Pichia pastoris strain GS115. The recombinant enzymes shared similar enzymatic properties including thermophilic and neutral optima (50–60 °C and pH 5.5–6.0) and high glucose tolerance, but differed in substrate specificities and kinetics. HiBgl3B was solely active towards aryl β-glucosides while HiBgl3A and HiBgl3C showed broad substrate specificities including both disaccharides and aryl β-glucosides. Of the three enzymes, HiBgl3C exhibited the highest specific activity (158.8 U/mg on pNPG and 56.4 U/mg on cellobiose) and catalytic efficiency and had the capacity to promote cellulose degradation. Substitutions of three key residues Ile48, Ile278 and Thr484 of HiBgl3B to the corresponding residues of HiBgl3A conferred the enzyme activity towards sophorose, and vice versa. This study reveals the functional diversity of GH3 β-glucosidases as well as the key residues in recognizing +1 subsite of different substrates.

show abstract

mentioning

confidence: 99%

Functional diversity of family 3 β-glucosidases from thermophilic cellulolytic fungus Humicola insolens Y1

Xia

Bai

Cui

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The bands in the region 2880-2974 cm -1 and that centered at 1464 cm -1 are attributed to C-H stretching, respectively to C-H in-plane bending vibrations. Other spectral bands, such as, 1335 cm -1 (CH2 rocking vibration at C6), 1381 cm -1 (CH in-plane bending), 1418 cm -1 (HCH in plane bending vibration, CH2 scissoring motion, CH2 symmetric bending at C6) are also attributed to alkyl units of the cellulose chain (Sharma et al, 2009;Abdel-Halim et al, 2015;Joshi et al, 2019).…”

Section: Ftir Analysismentioning

confidence: 99%

Cellulose derivative/barium titanate composites with high refractive index, conductivity and energy density

Barzic¹,

Soroceanu²,

Rotaru³

et al. 2022

Cellulose

View full text Add to dashboard Cite

High refractive index and transparent materials are useful in various technical domains, ranging from energy sector to microelectronics. This work deals with polymer composites prepared by embedding small amounts of barium titanate in hydroxypropyl cellulose matrix. Optical transparency of the composite films varies in agreement with polymer doping level. Light dispersion in the prepared composites allowed evaluation of specific parameters, which are related to the sample structural order and possible optical transitions. Conductivity of the composites is increased due to ceramic particle addition in the polymer. Dielectric studies reveal that the prepared materials are suitable for electric energy storage applications.

show abstract

“…Modified dextran was shown to successfully increase the uptake of DOX, and this material could become a promising carrier for DOX . Modified cellulose, hydroxypropyl and hydroxyethyl celluloses were also used to create similar kinds of nanoparticles . Nonviral gene delivery was performed using comb‐shaped poly[(2‐dimethylamino)ethyl methacrylate], which is cationic, and dextran backbone through atom transfer radical polymerization .…”

Section: Self‐assembling Polysaccharide Drug‐loaded Nanoparticlesmentioning

confidence: 99%

“…[126] Modified cellulose, hydroxypropyl and hydroxyethyl celluloses were also used to create similark inds of nanoparticles. [127] Nonviral gene delivery was performed using comb-shaped poly[(2dimethylamino)ethyl methacrylate],w hich is cationic, and dextran backbonet hrough atom transfer radical polymerization. [65a] Ad extrin nanogel loaded with DOX was formed by chemicalc rosslinking using glyoxal and ultrasonication.…”

Section: Entrapment Of Drugs In Hydrogels and Aerogel Matricesmentioning

confidence: 99%

Biodegradable Polysaccharides for Controlled Drug Delivery

et al. 2016

View full text Add to dashboard Cite

Polysaccharides are ideal candidates for drug delivery and biomedical applications as they are easily obtained from natural sources. Furthermore, they can be subjected to a wide range of chemical and enzymatic reactions, they have biocompatible and biodegradable properties and have inherently low immunogenicity. Polysaccharides are potentially the materials of choice for the development of “smart” delivery systems, which are capable of releasing, at the appropriate time and site of action, an encapsulated drug. This Review examines various aspects of the crosslinking of polysaccharides, either for a single polysaccharide or mixtures, and also natural–synthetic hybrids. The Review focuses on the strategies for using these biodegradable polymers for controlled drug delivery, and examines in particular polysaccharide–drug conjugates, the encapsulation of drugs in hydrogels and aerogels, and the self‐assembly of polysaccharide drug‐loaded nanoparticles.

show abstract

Utilization of olive tree branch cellulose in synthesis of hydroxypropyl carboxymethyl cellulose

Cited by 28 publications

References 64 publications

Functional diversity of family 3 β-glucosidases from thermophilic cellulolytic fungus Humicola insolens Y1

Functional diversity of family 3 β-glucosidases from thermophilic cellulolytic fungus Humicola insolens Y1

Cellulose derivative/barium titanate composites with high refractive index, conductivity and energy density

Biodegradable Polysaccharides for Controlled Drug Delivery

Contact Info

Product

Resources

About