Results 21 to 30 of about 165,219 (191)
A systematic review of physical techniques for chitosan degradation
Carbohydrate Polymer Technologies and Applications, 2021 Chitosan is a biomaterial that has widespread applications in different fields such as food industry, agriculture, pharmacy, medicine, cosmetology, textile and paper industries etc.
Ashish Pandit +4 more
doaj +1 more source
"CHITOSAN OLIGOMERS – SYNTHESIS, CHARACTERIZATION AND PROPERTIES "
Cellulose Chemistry and Technology, 2022 The paper presents the synthesis of chitosan oligomers with different polymerization degrees (PD) by chitosan depolymerization in the presence of nitrous acid, aiming to study the correlation between their polymerization degree and their properties. Seven oligomers were synthesized and purified.
DANIELA AILINCAI +3 more
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Formation of Silver Nanoparticles Using Fluorescence Properties of Chitosan Oligomers. [PDF]
Mar Drugs, 2018 In this study, silver chloride nanoparticles (AgCl NPs) were prepared using chitosan oligomer (CHI) and chitosan oligomer derivatives (CHI-FITC). The CHI and CHI-FITC were used as markers to confirm the formation of AgCl NPs using their fluorescence properties as well as stabilizers.
Cheon JY, Lee HM, Park WH.
europepmc +4 more sources
Bark Extract of Uncaria tomentosa L. for the Control of Strawberry Phytopathogens
Horticulturae, 2022 Gray mold (Botrytis cinerea Pers.), crown and fruit rot (Phytophthora cactorum (Lebert and Cohn) J.Schröt), and verticillium wilt (Verticillium dahliae Kleb.) are among the main diseases that affect the strawberry crop. In the study presented herein, the
Eva Sánchez-Hernández +6 more
doaj +1 more source
Investigating the effect of chitosan on gene expression, p5cs enzyme activity and proline content in rapeseed (Brassica napus L.) under salt stress [PDF]
مجله بیوتکنولوژی کشاورزی, 2022 Objective Salinity is one of the most important stresses that reduce the yield of most plants. Plants use different mechanisms in response to environmental stresses.
Zohreh Khosravian +2 more
doaj +1 more source
Unraveling the impact of acetylation patterns in chitosan oligomers on Cu2+ ion binding : insights from DFT calculations [PDF]
, 2023 Chitosans are partially acetylated polymers of glucosamine, structurally characterized by their degree of polymerization as well as their fraction and pattern of acetylation.
Moerschbacher, Bruno M. +2 more
core +1 more source
Indonesian Journal of Chemical Research, 2017 Chitosan oligomers or chitooligomer is a mixture of oligomers of D-glucosamine which are formed through a process of depolymerization of chitosan with cuting its β-glycosidic bonding.
Sarni Sarni
doaj +1 more source
Functionalization of Chitosan Oligomers: From Aliphatic Epoxide to Cardanol-Grafted Oligomers for Oil-in-Water Emulsions [PDF]
Biomacromolecules, 2021 Hydrophobically modified chitooligosaccharides (COSs) were tested for suitability as an emulsifier in cationic bituminous emulsions. COSs with polymerization degrees (DPs) of 5, 10, 15, and 20 were obtained by nitrous acid deamination. A complete study on depolymerization and precise product and side product characterization was undergone.
Camille Chapelle +5 more
openaire +4 more sources
Frontiers in Chemistry, 2020 Chitin, a polymer of β-(1→4)-linked N-acetyl-d-glucosamine, is one of the main polysaccharide components of the fungal cell wall. Its N-deacetylated form, chitosan, is enzymatically produced in the cell wall by chitin deacetylases.
Yury E. Tsvetkov +4 more
doaj +1 more source
Chitosan Oligomer as a Raw Material for Obtaining Polyurethane Foams
Polymers, 2023 Decreasing oil extraction stimulates attempts to use biologically available sources to produce polyols, which are the basic components for obtaining polyurethane foams. Plants are inexhaustible source of oils, sugars, starches, and cellulose. Similar substrates to obtain polyols are chitosans.
Strzałka, Anna +2 more
openaire +2 more sources