Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 266 for “"chitosan"”.
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Neuroprotection by Chitosan and Chitosan Nanoparticles
… explorations of the neuroprotection by chitosan and chitosan nanoparticles (Chi-NPs) in SCI related cell and tissue studies, we further investigated the neuroprotective effects based on two major characteristics of chitosan: (1) molecular weight (MW) and (2) degree of acetylation (DA). …
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Viscoelastic properties of chitosan
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nutrition and Food Science, 1983.
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Aspects of amidization of chitosan
… was to develop an understanding of an amidized chitosan-from-chitosan regeneration process discovered in our laboratory. In this study several characterization methods including DMTA, TMA, TGA, X-ray diffraction, FTIR, solid state CP-MAS ¹³C NMR, and HPLC were used to study the transformation of …
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Herstellung von Chitosan und einige Anwendungen
1. Die Deacetylierung von crabshell – Chitosan führte gleichzeitig zu einem drastischen Abfall der mittleren viscosimetrischen Molmasse ( Mv), insbesondere wenn die Temperatur und die Konzentration an NaOH erhöht werden. Diese Parameter beeinflussten jedoch nicht den Grad der Deacetylierung (DD). …
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Remediation of water using modified chitosan.
Water treatment has been an area of increasing concern over the last decade. This interest is due to exponential increase in demand of already limited water sources. Therefore the treatment of wastewater for re-use is a topic of great interest. The treatment applied depends on the source and …
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Optimization of antimicrobial chitosan coating for silicone
… on developing antimicrobial coatings, based on chitosan, for silicone elastomers, a common material in implants and other medical devices. Chitosan is a natural amino polysaccharide that is both antimicrobial and biocompatible.
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Chitosan fibrous scaffolds for cartilage tissue engineering
The biocompatibility of chitosan and its similarity with glycosaminoglycans make it attractive for cartilage engineering despite its limited cell adhesion properties. Structural and chemical characteristics of chitosan scaffolds may be improved for cartilage engineering application. We planned to …
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The processing and properties of chitosan membranes.
Thesis: M.S., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1978
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BIOENGINEERING CHITOSAN-BASED TUBULAR NEURO-MUSCULAR GASTROINTESTINAL TISSUE
The gastrointestinal (GI) tract is a hollow muscular tubular organ that extends from the mouth down to the rectum. Different high pressure zones exist along the tract and are referred to as sphincters. Sphincters maintain a closure tone and relax upon receiving the appropriate signal to allow …
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CHITOSAN PARTICLES FOR THE CONTROLLED RELEASE OF PROTEINS
Back Ground Chitosan as a natural polymer has been fabulated into a number of formulations such as films, hydrogels and particles based on its excellent properties such as biodegradable, biocompotable, bioadhesive, permeartion-enhancement, antibiotic, antitumor etc. properties. Among them, chitosan …
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The Design of Polyelectrolyte Multilayers Using Galactosylated Chitosan
… (PEs). Anionic (hyaluronic acid) and cationic (chitosan and galactosylated chitosan) PEs were used in the fabrication of detachable, free-standing PEMs. The main focus of this study is the design of PEMs comprised of 50 bilayers of PEs. PEMs that contained galactose functional groups were …
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Chitosan/Ellagic Acid Composite Materials for Local Cancer Therapy
… vivo</em>.</p> <p> In this study, a natural chitosan polymer was employed as a drug vehicle and ellagic acid (EA), a naturally occurring phenolic compound, was incorporated as a therapeutic agent. The chitosan/ellagic acid composite films were developed by combining 1% (w/v) chitosan solution …
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The Use of Chitosan for Treatment of Pressure Ulcers
… biologically critical rationales for employing chitosan to treat pressure ulcers based on ulcer pathology and wound environments and (2) demonstrated the efficacy of chitosan and bFGF in treating pressure ulcers in an aged mouse model. This body of work presents a potentially beneficial method …
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Preparation and characterization of multifunctional chitosan microparticles for lung delivery
… The system designed for achieving this was a chitosan microparticulate system containing iron oxide nanoparticles and gemcitabine as the chemotherapeutic agent. Iron oxide nanoparticles were prepared by chemical co-precipitation. The iron oxide nanoparticles were made water dispersible by …
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Production and Characterisation of Self-Crosslinked Chitosan-Carrageenan Polyelectrolyte Complexes
… has been some work on complex formation between chitosan (CS) and carrageenan (CRG), much of the work undertaken has ignored the effect of pH on the consequent physicochemical properties of self-crosslinked polyelectrolyte complex (PEC) gels, films and scaffolds. Chitosan is a positively-charged …
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Synthesis of 6-Deoxy-6-Amino Chitosan and applications thereof
Chitin and chitosan play an important role in the context of a biorefinery, where waste is converted into useful products. The introduction of an amine onto chitosan at the C-6 position has led to the synthesis of a highly water soluble chitosan derivative, 6-deoxy-6-amino chitosan. However, all …
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Architectural scale biomimetic composites based on chitosan and alginate hydrogels
… led by Laia Mogas-Soldevila and Jorge Duro-Royo. Chitosan and alginate (among other natural polymers) are processed from shellfish waste and algae, respectively, and highly viscous solutions are extruded as a layer-by-layer printing material which dries into a solid, single material product with …
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Micro/Nanoencapsulation of Proteins Within Alginate/Chitosan Matrix by Spray Drying
… nanoparticles had smooth surfaces. Stable glycol-chitosan-ca-alginate particles were produced with single step operation. The resulting particles had mean diameter around 3.5μm and released 35% of the initial protein content to the simulated stomach environment within 2 hours. The protein …
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