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Topic: Chitin



  
 Chitin - Wikipedia, the free encyclopedia
The strength and flexibility of chitin is the reason it is the material of choice for surgical thread.
Chitin is used to make strong and flexible surgical thread that decomposes over time after the wound heals.
So chitin may be thought of as cellulose, with one hydroxyl group on each monomer replaced by an acetylamino group.
http://en.wikipedia.org/wiki/Chitin   (224 words)

  
 What is chitin?
Chitin itself is the subject of exciting medical experiments.
Using this process, scientists may be able to trigger breakdown and responses in other materials besides chitin.
Chitosan is formed by a process called "N-deacylation." Chitosan can be used within the human body to regulate diet programs, and researchers are looking into ways in which it can sure diseases.
http://wywy.essortment.com/whatischitin_rkkh.htm   (513 words)

  
 Health Benefits of Chitin in Weight Loss, Cholesterol, Irritable Bowel Syndrome, Colon
Chitin has strong anti-bacterial, anti-fungal and anti-viral properties that make it extremely useful in medical applications such as bandages, wound dressings, surgical sutures, periodontal treatments, and cataract surgery.
Chitin is a safe, functional food that helps the body naturally heal itself.
Ongoing research is finding numerous uses for Chitin and its derivatives in areas such as: arthritis, heart, allergies, blood pressure, immune system, tumors, digestion, wound dressings, eye and gum treatments, sutures, and skin grafts.
http://www.youngagain.com/chitnatfatab.html   (7484 words)

  
 Chitin
A study published in a Polish medical journal determined that a biological dressing made from a combination of human placenta and chitosan was comfortable and efficient, and promoted the process of healing.
And check with your doctor if you are taking medication.) Although chitin and chitosan are considered non-allergenic, people with shellfish allergies should not take them, nor should pregnant or breastfeeding women.
Other mechanisms of action in the body are still being investigated.
http://www.youngagain.com/chitin.html   (928 words)

  
 Solvents for and purification of chitin - Patent 4062921
The aim of the appended claims, therefore, is to cover all such changes and modifications as fall within the true spirit and scope of the invention.
While particular examples of the present invention have been shown and described it is apparent that changes and modification may be made therein without departing from the invention in its broader aspects.
They are handled best by heavy duty mixers, pressure filtration and other organisol techniques.
http://www.freepatentsonline.com/4062921.html   (1726 words)

  
 Chitin
With the same techniques, chitosan and chitin can be detected after topical application on skin.
This allows to monitor the fate of applied chitin/chitosan.
Insect Chemical Ecology: Integrated approach to defense strategies in herbivorous hymenoptera (INCHECO)
http://www.uni-ulm.de/biologie1/Forschung/Chitin/chitine.html   (591 words)

  
 Chitin metabolism in insects: structure, function and regulation of chitin synthases and chitinases -- Merzendorfer and ...
Chitin is one of the most important biopolymers in nature.
The peritrophic matrix is created when the chitin
The diagrammatic representation is based on previously published pathways (Kramer and Koga, 1986
http://jeb.biologists.org/cgi/content/full/206/24/4393   (7149 words)

  
 Independent regulation of chitin synthase and chitinase activity in Candida albicans and Saccharomyces cerevisiae -- ...
chitin synthase was suggested by the parallel stimulation of
Our investigations did reveal, however, that both chitin synthase
Chitin is an essential structural polysaccharide in fungi that
http://mic.sgmjournals.org/cgi/content/full/150/4/921   (3769 words)

  
 Horseshoe Crab Chitin Research
These new chitin sutures could be absorbed by the body, eliminating the need for surgical removal.
Chitin is natural, non-toxic, non-allergenic, anti-microbial, and biodegradable.
Chitin can be processed into many derivatives, the most readily available being chitosan, which is formed when chitin is heated with a chemical solution.
http://www.ocean.udel.edu/horseshoecrab/Research/chitin.html   (823 words)

  
 Purification and Characterization of Chitin Deacetylase from Colletotrichum lindemuthianum -- Tsigos and Bouriotis 270 ...
A radiometric assay, using radiolabeled glycol chitin as substrate, proved to be a rapid and sensitive way of screening chromatographic fractions, whereas the estimation of acetate released by an enzymatic method was used for monitoring the deacetylation process of nonradiolabeled substrates(24).
The purification of chitin deacetylase from the culture filtrate of C.
Purification and Characterization of Chitin Deacetylase from Colletotrichum lindemuthianum -- Tsigos and Bouriotis 270 (44): 26286 -- Journal of Biological Chemistry
http://www.jbc.org/cgi/content/full/270/44/26286   (4373 words)

  
 Identification and Characterization of the Three Chitin-Binding Domains within the Multidomain Chitinase Chi92 from ...
unprocessed chitin by the method described by Shimahara and Takiguchi
Since Chi92-N exhibited high homology to ChiN, it seems
of Chi92 on colloidal and unprocessed chitin but not on a soluble
http://aem.asm.org/cgi/content/full/67/11/5100   (4437 words)

  
 Chitin Inhibitors
Chitin Inhibitors also cause the disruption of the termite social behavior.
The worker termite lives about 2 years, so at some point during the termites life if it is affected by a chitin inhibitor, it will die.
Chitin "kite~en" Inhibitors work by not allowing the termite to molt.
http://www.factsfacts.com/MyHomeRepair/chitin_inhibitors.htm   (303 words)

  
 Alibris: chitin
Chitin sourcebook a guide to the research literature
This book aims to describe the factors necessary to standardize chitin processing and characterization.
The "Sourcebook" is the only work of its kind, providing quick access to the wealth of scientific data available from published literature about chitin and its derivatives.
http://www.alibris.com/search/books/subject/chitin   (343 words)

  
 Maryland Marine Notes: March-April 1997 Side Bar - Chitin Breakdown: The Bacterial
Maryland Marine Notes: March-April 1997 Side Bar - Chitin Breakdown: The Bacterial
Chitin oligosaccharides may have potential use in human medicine as well.
Chitin oligosaccharides, for example, are known to play an important role in plant disease resistance by "triggering" a plant's defense mechanisms against invasion by fungi (which have chitin in their cell walls).
http://www.mdsg.umd.edu/MarineNotes/Mar-Apr97/side1.html   (875 words)

  
 Chtin/Chitosan/Űƾ/ŰÅä»ê/
Preparation of Fermentated Chitin Oligomer Kimchi for Health
http://user.chollian.net/~chitin/intro.html   (16 words)

  
 CNN - Lowly shrimp shells could yield jumbo benefits, researchers say - February 4, 1999
Post fen-phen: Search is on for new diet drug
It's antifungal and antibacterial, but so easy on the skin that chitin membranes are being tested as a treatment for serious burn wounds.
Chitin experts are sure the shrimp will someday play an equally important role in medicine and industry.
http://www.cnn.com/TECH/science/9902/04/t_t/shrimp.plastic   (467 words)

  
 chitin on Encyclopedia.com
The chitin is rigid except between some body segments and joints where it is thin and allows movement of adjacent parts.
Chitin is also found in the cell walls of some fungi.
Like cellulose, chitin contributes strength and protection to the organism.
http://www.encyclopedia.com/html/c1/chitin.asp   (267 words)

  
 IngentaConnect Formation of Chitin Nanofibers by Supercritical Antisolvent
According to the Fourier-transform infrared spectroscopy, chitin molecular structure is preserved during the processing.
Chitin is emerging as a biopolymer of choice because of its potential uses in the numerous biomedical and pharmaceutical applications (e.g., wound dressing, tissue engineering, drug delivery, and antiallergic agent).
Unfortunately, because of the highly crystalline nature, chitin is not soluble in conventional solvents, and it is very difficult to convert it into the fine particulate or fibrous forms.
http://www.ingentaconnect.com/content/asp/jbn/2005/00000001/00000001/art00015   (170 words)

  
 Chitin
The chitin can then be converted into chitosan and glucosamine, products that are in high demand by the food supplement industry, the medical profession, manufacturing and agriculture.
The food supplement, or nutraceutical industry, sells glucosamine as a treatment for chronic arthritis and chitosan as a natural fiber for reducing cholesterol and absorbing fat.
The process is a closed-loop system that extracts the remainder of food-grade meat from the shells, then reduces the shells to their primary materials -- chitin and calcium -- with no discharge into the environment.
http://clemsonews.clemson.edu/WWW_releases/1998/November1998/Crab_Shells.html   (585 words)

  
 Genetic master switch sends bacteria toward 'seafood dinner'
The biologists made their discovery by studying mutated versions of Vibrios, the ocean's most common bacteria, which can cause illnesses such as cholera.
Researchers were puzzled about the disappearance of chitin because little of the material turned up in sediment on the ocean floors.
The scientists separated and tested the mutant strains according to their ability to detect and break down chitin, then they analyzed the bacteria's genetic structure to pinpoint the master switch.
http://www.eurekalert.org/pub_releases/2003-12/jhu-gms122903.php   (642 words)

  
 Pfam 18.0 : Chitin_bind_4
The cuticular proteins seem to be specific to the type ofcuticle (flexible or stiff) that occur at stages of the insect development.
Chitin binding has been shown experimentally for this region [1].
An extended form of this motif has been shown MEDLINE:11520687 to bind chitin.
http://pfam.wustl.edu/cgi-bin/getdesc?name=Chitin_bind_4   (301 words)

  
 Chitin-protein complex in theOrdovician organic fossil Byronia (Scyphozoa).
Ultrastructural studies have not shown any traces of chitin-protein complexes in all studied microfossils, although chitin is the most abundant organic skeletal component of invertebrates.
Nonetheless, we suppose that the presence of a chitin-protein complex in the studied microfossil is convincing, The application of a highly specific, accurate and quantative enzymatic method of Jeuniaux (1963) might resolve this problem finally.
Organic skeletons of Palaeozoic marine invertebrates have been studied for several years with the methods of electron microscopy.
http://www.graptolite.net/Chitin.html   (467 words)

  
 Chitin Magnetic Beads, Magnetic Matrices, New England Biolabs
Chitin beads have been prepared having a magnetite core.
An affinity matrix for the small-scale isolation of target proteins fused to a chitin binding domain (CBD) (1).
This permits the magnetic isolation of CBD-fusion proteins from cell culture supernatants; after which, the matrix can be regenerated without loss of binding capacity.
http://www.neb.com/nebecomm/products/productE8036.asp   (237 words)

  
 Chitosan - Chitin Chitosan
Chitosan naturally carries a positive charge that is able to attract and absorb negatively charged compounds, and is thus able to significantly bind with fat molecules and convert them into a form which the human body does not absorb.
Chitosan is a soluble fiber derived from chitin, a complex carbohydrate that comes from the hard shells of crustaceans like crab and lobster.
Soluble fiber can be dissolved in water and can be broken down by bacterial enzymes in the intestinal tract; insoluble fiber cannot be broken down and passes through the digestive tract largely intact.
http://www.chitinchitosan.net   (898 words)

  
 Pfam 18.0 : Chitin_synth_2
The chsD and chsE genes of Aspergillus nidulans and their roles in chitin synthesis.
Chitin synthase (EC:2.4.1.16), also known as chitin-UDP acetyl-glucosaminyl transferase, is a plasma membrane-bound protein which catalyses the conversion of UDP-N-acettyl-D-glucosamine and {(1,4)-(N-acetyl-
Members of this family are fungal chitin synthase EC:2.4.1.16 enzymes.
http://pfam.wustl.edu/cgi-bin/getdesc?acc=PF03142   (105 words)

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