Photoluminescence properties of multilayer oxide films intercalated with rare earth ions by the layer-by-layer technique

2006 ◽  
pp. 3619 ◽  
Author(s):  
Shintaro Ida ◽  
Kazuhiko Araki ◽  
Ugur Unal ◽  
Kazuyoshi Izawa ◽  
Ozge Altuntasoglu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Oxide Films ◽  
Rare Earth Ions ◽  
Layer By Layer ◽  
Photoluminescence Properties ◽  
Layer Technique ◽  
Layer By Layer Technique

Pectin-Chitosan Multilayer Coated Microbeads of Diclofenac Sodium Prepared by Layer-by-Layer Technique

2014 ◽  
Vol 1060 ◽  
pp. 45-49
Author(s):  
Kamonrak Cheewatanakornkool ◽  
Pornsak Sriamornsak
Keyword(s):  
Controlled Release ◽  
Drug Release ◽  
Diclofenac Sodium ◽  
Gastric Fluid ◽  
Layer By Layer ◽  
Release Behavior ◽  
Freeze Dried ◽  
Layer Technique ◽  
Calcium Pectinate ◽  
Layer By Layer Technique

The main objective of this study was to fabricate biopolymer-based microbeads, providing enteric properties and controlled release of diclofenac sodium, using layer-by-layer technique. The calcium pectinate microbeads have been designed and coated with chitosan and pectin multilayers. Drug release was performed in simulate gastric fluid (pH 1.2) for 2 hours, followed by pH 6.8 buffer for 8 hours. The effects of chitosan concentration, number of layer and drying technique on drug release were investigated. The results showed that the calcium pectinate microbeads could be simply prepared by ionotropic gelation and then coated with chitosan and pectin solutions using layer-by-layer procedure. The diameter of the microbeads ranged from 800 to 1000 μm for air-dried samples and from 1 to 2 mm for freeze-dried samples. The freeze-dried microbeads had a rough surface and many pores inside, as observed by SEM. The microbeads coated with 4% chitosan/4% pectin revealed a slower drug release than those coated with 1% chitosan/4% pectin and demonstrated a controlled release pattern. Moreover, different drying techniques and numbers of layer also influenced drug release behavior of the prepared microbeads.

Highly transparent and self-healing films based on the dynamic Schiff base linkage

RSC Advances ◽  
2016 ◽  
Vol 6 (116) ◽  
pp. 115247-115251 ◽  
Author(s):  
Jiaoyu Ren ◽  
Yanxi Zhu ◽  
Hongyun Xuan ◽  
Xuefan Liu ◽  
Zhichao Lou ◽  
...  
Keyword(s):  
Schiff Base ◽  
Layer By Layer ◽  
Self Healing ◽  
Layer Technique ◽  
Layer By Layer Technique

In this study, we report highly transparent self-healing films based on Schiff base linkages between DF-PEG and CS via a layer-by-layer technique.

Effect of metal ions on physical properties of multilayers from hyaluronan and chitosan and adhesion, growth and adipogenic differentiation of multipotent mouse fi-broblasts

Soft Matter ◽  
2021 ◽  
Author(s):  
Husnia Muftah Kindi ◽  
Matthias Menzel ◽  
Andreas Heilmann ◽  
Christian EH Schmelzer ◽  
Martin Herzberg ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Physical Properties ◽  
Metal Ions ◽  
Adipogenic Differentiation ◽  
Polyelectrolyte Multilayers ◽  
Layer By Layer ◽  
Layer Technique ◽  
Layer By Layer Technique

Polyelectrolyte multilayers (PEM) consisting of the polysaccharides hyaluronic acid (HA) as polyanion and chitosan (Chi) as polycation are prepared by the layer-by-layer technique (LbL). The [Chi/HA]5 multilayers are exposed to...

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