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Recent News and Articles on the Keywords: medical applications + medical application + chitin  Related to the article below (Last Update: 5/5/2008)

Global Chitin Market to Exceed 51.4 Thousand Metric Tons by 2012 ...
Emediawire (press release), WA - Apr 15, 2008
Eco-friendliness is a key factor positively affecting the use of more non-medical grade biopolymers. The renewable, degradable and recyclable properties of ...GLBL
Source: Google News

Biodegradable polyesters for medical and ecological applications -
Y Ikada, H Tsuji - Macromol. Rapid Commun, 2000 - doi.wiley.com
... Biodegradable polyesters for medical and ecological applications ... Similar to
biodegradation of cellulose and chitin by cellu- lase and chitinase, aliphatic ...

Implantable applications of chitin and chitosan -
E Khor, LY Lim - Biomaterials, 2003 - Elsevier
... It is likely that future sources of chitin and chitosan will come from biotechnology
innovations, especially when medical applications are the focus. ...

Application of chitin-and chitosan-based materials for enzyme immobilizations: a review -
B Krajewska - Enzyme and Microbial Technology, 2004 - Elsevier
... Understandably, for food, pharmaceutical, medical and agricultural applications,
nontoxicity and ... or inorganic, natural or synthetic, chitin and chitosan ...

APPLICATIONS AND ENVIRONMENTAL ASPECTS OF CHITIN AND CHITOSAN -
MG PETER - Degradable Polymers, Recycling, and Plastics Waste …, 1995 - books.google.com
... 46 PETER Numerous medical applications have been suggested. Since chitin and chitosan
can be degraded by lysozyme, they are useful as drug carriers and slow ...

A review of chitin and chitosan applications -
MNV Ravi Kumar - Reactive and Functional Polymers, 2000 - Elsevier
... A wide variety of medical applications for chitin and chitin derivatives have
been reported over the last three decades [71, 72 and 73]. ...

… mycelia as the source of chitin and polysaccharides and their applications as skin substitutes -
CH Su, CS Sun, SW Juan, CH Hu, WT Ke, MT Sheu - Biomaterials, 1997 - Elsevier
... awareness of the importance of biomater- ials in medical applications, the development ...
Chitin, chitosan and collagen have become the most important ingredients ...

Photocrosslinkable chitosan as a dressing for wound occlusion and accelerator in healing process -
M Ishihara, K Nakanishi, K Ono, M Sato, M Kikuchi, … - Biomaterials, 2002 - Elsevier
... the moist healing environment and accelerating effect of the chitin and chitosan ...
molecule that may be used as a biological adhesive in medical applications. ...

[BOOK] Chitin and Chitosan: Sources, Chemistry, Biochemistry, Physical Properties, and Applications
G Skj?k-Braek, T Anthonsen - 1989 - Kluwer Academic Pub

Biomedical Applications of Chitin, Chitosan, and Their Derivatives
DK Singh, AR Ray - Polymer Reviews, 2000 - informaworld.com
... Various forms of chitin-based products are available for medical applications, like
finally divided powder, nonwoven fabrics, porous beads, lyophilized soft ...

… interactions in covalently and ionically crosslinked chitosan hydrogels for biomedical applications -
J Berger, M Reist, JM Mayer, O Felt, NA Peppas, R … - European Journal of Pharmaceutics and Biopharmaceutics, 2004 - Elsevier
... is generally obtained by alkaline deacetylation from chitin, which is the ... receiving
a great deal of interest for medical and pharmaceutical applications. ...

Source: Google Scholar

Medical Applications Discovered For Chitin From Lobster Shells
Chitin is a polymer very common in nature as part of animals' and plants' physical structures. Only cellulose is more abundant than chitin, which makes this compound a highly important renewable resource that can easily be found in arthropods, insects, arachnids, molluscs, fungus and algae.

The fishing industry in Cuba generates great amounts of lobster waste, "a pollutant rich in proteins and chitin", states Professor Carlos Andres Peniche Covas, head of the Biopolymers Research Group, from the Biomaterials Centre of the University of Havana. This group is doing research into chitin and chitosan extraction from such waste, in collaboration with the Spanish Centre for Scientific Research (CSIC), the Complutense University in Madrid (Spain) and the Mexican Research Centre for Food and Development.
Prof. Peniche points out that "this work allows for the first accurate and comprehensive results of a university study on chitin and chitosan. The study starts at the extraction of these compounds from polluting waste of the Cuban fishing industry and it goes on to cover these products' characterisation through traditional techniques and some more innovative ones, the study of their properties, the development of new by-products and the testing of their practical applications in areas useful for this Caribbean country, such as agriculture and biomedicine."

Use in medicine

These researchers' work has led to the development of a procedure to obtain surgical materials with great healing and antiseptic properties. "This procedure involves using chitosan to cover surgical threads and lint, into which antibiotics are injected. By doing this, we obtain medical materials with both antimicrobial and healing properties and, as they are covered in a natural polymer, with a higher degree of biocompatibility." Research shows that such properties remained unmodified after sterilisation.

Two new types of surgical thread were produced in collaboration with the Cuban Superior Institute of Military Medicine "Dr. Luis Diaz Soto": Agasut-Q, covered with chitosan (healing properties) and Agasut-QE, covered with chitosan and streptomycin (healing and antimicrobial properties). After preclinical and clinical trials were approved, both surgical thread types were introduced and successfully used in several Cuban hospitals.

Use in agriculture

The study, however, was not restricted to biomedicine. In cooperation with the Cuban National Centre for Agricultural and Livestock Health (CENSA), this group worked in 'seed coating to boost farming yields as well as in encapsulation of somatic embryos to design artificial seeds".
In trials, tomato seeds of variety 1-17[140] were coated with chitosan. Under laboratory conditions, treated seeds showed significantly higher growth speed and percentage of successful germination when compared to non-treated seeds.

In Prof. Peniche's words, the research group concluded that "chitosan works as a bio-stimulant in tomato seed treatment by producing better seed germination and greater plant height, stem thickness and dry mass about a week earlier than usual". Chitosan proved to be a natural polymer with great film-generating capacity, apart from other highly interesting properties: chitosan does not produce polluting substances, it is non-toxic and biocompatible.

Reference:

Prof. Carlos Andres Peniche Covas. Biomaterials Centre, University of Havana (Cuba).
Web: http://www.uh.cu/centros/biomat/index.htm.

Source: Professor Carlos Andres Peniche Covas
Universidad de Granada
 
 
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