Results 51 to 60 of about 394,350 (343)

Chitosan/Poly(2-ethyl-2-oxazoline) films with ciprofloxacin for application in vaginal drug delivery [PDF]

, 2020
Chitosan (CHI) and chitosan/poly(2-ethyl-2-oxazoline) (CHI/POZ)-based films were prepared by casting from aqueous solutions of polymer blends with different compositions. Ciprofloxacin was used as a model drug in these formulations. The weight, thickness,
Abilova, Guzel K., Irmukhametova, Galiya S., Iskakbayeva, Zhanar A., Kaldybekov, Daulet B., Kazybayeva, Diara S., Khutoryanskiy, Vitaliy V., Kudaibergenov, Sarkyt E.   +6 more
core   +1 more source

Fragmentation of Chitosan by Acids [PDF]

The Scientific World Journal, 2013
Fragmentation of chitosan in aqueous solution by hydrochloric acid was investigated. The kinetics of fragmentation, the number of chain scissions, and polydispersity of the fragments were followed by viscometry and size exclusion chromatography. The chemical structure and the degree of N‐acetylation (DA) of the original chitosan and its fragments were ...
Mohammad Reza Kasaai, Joseph Arul, Gérard Charlet   +2 more
openaire   +4 more sources

Photothermal Hydrogel with Mn3O4 Nanoparticles Alleviates Intervertebral Disc Degeneration by Scavenging ROS and Regulating Extracellular Matrix Metabolism

Advanced Functional Materials, EarlyView.
The MPTT‐nanozyme‐hydrogel system (Mn3O4@ChS‐HA) provides a multifunctional therapeutic strategy for intervertebral disc degeneration (IVDD), effectively targeting oxidative stress and enhancing AF repair by restoring extracellular matrix (ECM) and redox homeostasis.
Yangyang Chen, Chan Xue, Feifei Ni, Binwu Hu, Miaoheng Yan, He Zhang, Yuxiang Hu, Xiaoyao Peng, Guangfang Li, Yu Han, Hongjian Liu, Zengwu Shao, Qin Wang, Yulong Wei   +13 more
wiley   +1 more source

Autoclaving Achieves pH-Neutralization, Hydrogelation, and Sterilization of Chitosan Hydrogels in One Step

Macromol
Conventionally, chitosan hydrogels are acidic and contain toxic chemicals because chitosan is soluble only in acidic solvents and requires toxic additives such as chemical crosslinkers and polymerization agents to fabricate chitosan hydrogels.
Yusuke Yamashita, Yoshihiro Ohzuno, Masahiro Yoshida, Takayuki Takei   +3 more
doaj   +1 more source

Nghiên cứu chiết rút và khảo sát tính kháng khuẩn của chitosan tan trong nước từ vỏ tôm thẻ chân trắng (Litopenaeus vannamei)

Tạp chí Khoa học Đại học Cần Thơ, 2020
Nghiên cứu nhằm mục tiêu tạo ra chitosan có khả năng tan trong nước và kháng khuẩn từ vỏ tôm thẻ chân trắng (Litopenaeus vannamei) thông qua quá trình deacetyl hóa chitin trong dung dịch NaOH để thu chitosan thô.
Phạm Văn Dũ, Nguyễn Thị Kim Thương, Lê Thị Minh Thủy, Nguyễn Văn Thơm   +3 more
doaj   +1 more source

Nitrogen sorption as a tool for the characterisation of polysaccharide aerogels [PDF]

, 2011
Supercritically dried aerogels of several polysaccharides (chitin, chitosan, alginate, alginic acid, k- carrageenan, and agar) have been characterised by physisorption ofN2. Surface areas as high as 570m2 g−1 have been measured.
Boissière, M., Devoisselle, Jean-Marie, Di Renzo, Francesco, Horga, Ron, Quignard, Françoise, Robitzer, Mike, Tourrette, Audrey, Valentin, Romain   +7 more
core   +2 more sources

Designing of Self‐Dispersing Soft Dendritic Microcleaners for Microplastics Capture and Recovery

Advanced Functional Materials, EarlyView.
The capture and recovery of microplastics from open aquatic systems is a complex problem, which necessitates nontrivial solutions. The principles of a comprehensive multistage process based on sustainably sourced microcleaners with hierarchical morphology are demonstrated.
Haeleen Hong, Rachel S. Bang, Lucille Verster, Orlin D. Velev   +3 more
wiley   +1 more source

Isolation and characterization of chitosan from Ugandan edible mushrooms, Nile perch scales and banana weevils for biomedical applications

Scientific Reports, 2021
Of recent, immense attention has been given to chitosan in the biomedical field due to its valuable biochemical and physiological properties. Traditionally, the chief source of chitosan is chitin from crab and shrimp shells.
Kenneth Ssekatawa, Denis K. Byarugaba, Eddie M. Wampande, Tlou N. Moja, Edward Nxumalo, Malik Maaza, Juliet Sackey, Francis Ejobi, John Baptist Kirabira   +8 more
doaj   +1 more source

Adsorption of nitrate and phosphate in an aqueous solution on composites of PVA and chitosan prepared from a Somanniathelphusa sinensis shell

Water Supply, 2021
In this study, chitosan was prepared from the shell of Somanniathelphusa sinensis, which is a crab ubiquitous in Vietnam. The 3-level, 3-factor Box–Behnken design was applied to the preparation of chitosan to investigate effects of factors such as the ...
Hieu Trung Nguyen, Ha Manh Bui
doaj   +1 more source

Effects of nano-chitosan and chitosan coating on the postharvest quality, polyphenol oxidase activity and malondialdehyde content of strawberry (Fragaria x ananassa Duch.) [PDF]

Journal of Horticulture and Postharvest Research, 2020
Purpose: The aim of this study was to investigate the effects of nano-chitosan and chitosan coating on physico-chemical properties of strawberries during storage. Research methods: Fresh strawberries were coated with different concentrations of chitosan (
Ha Nguyen, Duyen Nguyen
doaj   +1 more source