CHITIN

kītˈən, main constituent of the shells of arthropods. Chitin, a polysaccharide (see carbohydrate) analogous in chemical structure to cellulose, consists of units of a glucose derivative (N-acetyl-d-glucosamine) joined to form a long, unbranched chain. Like cellulose, chitin contributes strength and protection to the organism. In arthropods the chitinous shell, or exoskeleton, covers the surface of the body, does not grow, and is periodically cast off (molted). After the old shell is shed, a new, larger shell is secreted by the epidermis, providing room for future growth. 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.

____________________

The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

-10127-

Top...
Search the Library
Books
Journals
Magazines
Newspapers
Encyclopedia
Advanced Search
About Questia
Questia is the world's largest online academic library offering full-text books, journals, and articles on thousands of topics.

Join Now...
Questia Books and Articles on: Chitin
We found: 255 results
By media type:
 

Books:

 

143  

 

Journal articles:

 

50  

 

Magazine articles:

 

33  

 

Newspaper articles:

 

21  

 

Encyclopedia articles:

 

8  
 

books on: Chitin  - 143 results

       More book Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
Histological Technique: A Guide for Use in a Laboratory Course in Histology
Book by B. F. Kingsbury, O. A. Johannsen; J. Wiley & Sons, Inc., 1927
Subjects: Histology--Laboratory Manuals
...Microtomists Vade-mecum , Chapter XXVI . THE CHITIN One of the greatest difficulties encountered...sectioning arthropod tissue is the presence of chitin. It cannot be dissolved without destroying...way as to remove the greater part of the chitin and then re-imbed. This, of course...
2.
Animal and Plant Anatomy - Vol. 2
Book by Barbara Abraham, Amy-Jane Beer, Erica Bower, Sally-Anne Mahoney, Chris Mattison, Kieran Pitts, John Stewart, Phil Whitfield; Marshall Cavendish, 2006
Subjects: Anatomy, Botany--Anatomy
...two main LlYLTs, The irrnrr-most cf these (thc procutick) contains all illlport.ll1t chemical, chitin, The importance of chitin Chitin is a tliit forn?s loy ch:nm of molecuks, lic embedded in 1 mntriv of proteins. The chaim hnk to...
3.
Protoplasm
Book by William Seifriz; McGraw-Hill Book Company, Inc., 1936
Subjects: Protoplasm
...is a long one; it includes starch, gelatin, chitin, rubber, silk, hair, keratin, sinew, muscle...be expected of colloidal matter. The case of chitin is particularly interesting. Chitin a polyacetyglucosamine of both plant and animal...
4.
Subcellular Particles: A Symposium Held during the Meeting of the Society of General Physiologists at the Marine Biological Laboratory, Woods Hole, Massachusetts, June 9-11, 1958
Book by Teru Hayashi; Ronald Press Co., 1959
Subjects: Cytology
...of the acetyl block was obtained when chitin from the egg case of Busycon was tested...molecular and crystallographic properties 18 , chitin provided an exceptionally useful material...natural state, the 2-amino- group of chitin is acetylated and, assuming the H-bond...
5.
Encyclopedia of Life Sciences - Vol. 8
Book by Anne O'Daly; Marshall Cavendish, 2004
Subjects: Biology--Encyclopedias, Life Sciences--Encyclopedias
...cellulose. Other polysaccharides, such as chitin, arc found in the shells of crustaceans...exoskeletons of insects, and in fungi. Chitin is similar to cellulose but with the difference of one small chemical group. Chitin is less flexible than cellulose, and...
More book Results: 1-10 11-20 21-30 31-40 41-50 >>

Top...
 

journal articles on: Chitin  - 50 results

       More journal Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
The Saccharomyces Cerevisiae Actin Cytoskeletal Component Bsp1p Has an Auxiliary Role in Actomyosin Ring Function and in the Maintenance of Bud-neck Structure
Journal article by Daniel J. Wright, Ewen Munro, Mark Corbett, Adam J. Bentley, Nigel J. Fullwood, Stephen Murray, Clive Price; Genetics, Vol. 178, 2008
Subjects: Actins, Actomyosin, Adaptor Proteins, Vesicular Transport, Amino acids, Binding sites, Bsp1 protein, S cerevisiae, CACHS3 protein, Fungal, Chitin, Chitin Synthase, Fungal Proteins, IQ motif containing GTPase activating protein 1, Kinases, Mutation, Proteins, Saccharomyces cerevisiae Proteins, ras GTPase-Activating Proteins
...primary septum, creating a trilaminate chitin structure, and the subsequent dissolution...Kuranda and Robbins 1991). A second chitin synthase, Chs3p, is thought to be involved...described by Adams and Pringle (1991). Chitin was visualized using Fluorescent Brightener...
2.
A Mutation in the Putative Mlh3 Endonuclease Domain Confers a Defect in Both Mismatch Repair and Meiosis in Saccharomyces Cerevisiae
Journal article by K. T. Nishant, Aaron J. Plys, Eric Alani; Genetics, Vol. 179, 2008
Subjects: Adaptor Proteins, Signal Transducing, Endonucleases, Genetics, MLH1 protein, S cerevisiae, MLH3 protein, S cerevisiae, Mutation, Saccharomyces cerevisiae Proteins, Segregation, Yeast
...Change. These vectors were used for the chitin bead column chromatography presented in...Cells were pelleted, washed with chitin buffer (25 mM Tris, pH 8.0, 500 mM...described above for wild-type MLH3. For chitin bead column chromatography, proteins...
3.
Cellular Morphogenesis under Stress Is Influenced by the Sphingolipid Pathway Gene Isc1 and DNA Integrity Checkpoint Genes in Saccharomyces Cerevisiae
Journal article by Kaushlendra Tripathi, Nabil Matmati, W. Jim Zheng, Yusuf A. Hannun, Bidyut K. Mohanty; Genetics, Vol. 189, 2011
Subjects: Biomedical research, Cell cycle, Grants, Kinases, Phosphorylation, Plasmids, Proteins
...stress induced by HU and MMS. Abnormal chitin deposition in stressed isc1D cells The...alterations in cell-wall dynamics, including chitin distribution, during morphogenesis...daughter cells, we investigated whether chitin deposition was altered in these cells...
4.
Multiple Functional Domains of the Yeast 1,3-[Beta
Journal article by Hiroki Okada, Mitsuhiro Abe, Masayo Asakawa-Minemura, Aiko Hirata, Hiroshi Qadota, Kana Morishita, Shinsuke Ohnuki, Satoru Nogami, Yoshikazu Ohya; Vol. 184, 2010
...2-glucan, 1,6-;2-glucan, chitin, and mannoproteins (Cabib et al. 2001...mannoproteins (Ram et al. 1995), and chitin (Dallies et al. 1998; Garcia- Rodriguez...components, we stained mannoproteins and chitin, using FITC-Con A and calcofluor white...
5.
The Hsp40 Molecular Chaperone Ydj1p, along with the Protein Kinase C Pathway, Affects Cell-wall Integrity in the Yeast Saccharomyces Cerevisiae
Journal article by Christine M. Wright, Sheara W. Fewell, Mara L. Sullivan, James M. Pipas; Genetics, Vol. 175, 2007
Subjects: Apoptosis, Calcium-Binding Proteins, DNA, Fungal, Evacuations & rescues, HSP40 Heat-Shock Proteins, HSP82 protein, S cerevisiae, HSP90 Heat-Shock Proteins, Kinases, MID2 protein, S cerevisiae, Membrane Proteins, PKC1 protein, S cerevisiae, Protein Kinase C, Saccharomyces cerevisiae Proteins, YDJ1 protein, S cerevisiae
...3-glucan chains and small amounts of chitin, which are covalently "glued" together...Synthesis of ;21,3-glucan chains and chitin takes place at the yeast cell wall by...2000), possibly due to an increase in chitin (KETELA et al. 1999). Thus, we hypothesized...
More journal Results: 1-10 11-20 21-30 31-40 41-50 >>

Top...
 

magazine articles on: Chitin  - 33 results

       More magazine Results: 1-10 11-20 21-30 31-33 >>  
 
1.
A Cure for Soggy Sandwiches
Magazine article by Marcelle M. Soviero; Popular Science, Vol. 240, March 1992
Subjects: Chitin, Containers & packaging, Food, R&D, Research & development
...toting schoolchildren: soggy sandwiches. Chitin (pronounced kiten) and its derivative...used as a strengthening agent in paper. Chitin, from which chitosan is derived, is...The conversion is fairly simple: The chitin is treated with sodium hydroxide to form...
2.
A Bestiary of Useful Fibers
Magazine article; Whole Earth, Summer 1997
Subjects: Animal fibers--Usage, Textile industry--Associations and societies
...use of silk in all forms. Crab Lobster Chitin is the fiber of lobsters, crabs, and...insects. The frame of butterfly wings, chitin is a kind of long-chain sugar closely...the softer fabric-like qualities of chitin are more apparent. Currently used for...
3.
Wheat Can Starve Insect Predators
Magazine article; USA Today (Society for the Advancement of Education), Vol. 135, June 2007
Subjects: Diptera--Genetic aspects, Insect resistance (Plants)--Research, Plants--Insect resistance, Plants--Research, Wheat--Genetic aspects
...the carbohydrate structure, known as chitin. When the larvae attack a resistant plant...interaction probably damages the larvaes chitin-rich mid-gut lining so that it cannot...adds. "Were finding compounds like this chitin-binding lectin that dont cost the plant...
4.
The Animal(s) within Us: Life on Earth Took Many Forms before the Emergence of Mammals and Mankind
Magazine article by Christiane Nusslein-Volhard; USA Today (Society for the Advancement of Education), Vol. 139, September 2010
Subjects: Animals--Natural history, Evolution (Biology)--Research, Evolution--Research
...variation in form and, hence, adaptation. Cuticle built from chitin, calcium shells, and interior skeletons composed of cartilage...mussels attaches to the body muscles. The arthropods outer chitin-skeleton, with its many flexible joints, allows for sophisticated...
5.
The Allure of Anteaters: Attracting Increased Attention from Scientists and the General Public Alike, These Endearing Creatures Are "Ambassadors" for Wildlife Conservation and Research
Magazine article by Jeffrey P. Cohn; Americas (English Edition), Vol. 59, November 2007
Subjects: Anteaters--Research, Wildlife conservation--Social aspects
...in their diets. Taurine is an amino acid found naturally in chitin, which forms the exoskeleton or outer shell of insects. It...taurine supplements, and added the heads of shrimp to provide the chitin anteaters would normally get from consuming ants and termites...
More magazine Results: 1-10 11-20 21-30 31-33 >>

Top...
 

newspaper articles on: Chitin  - 21 results

       More newspaper Results: 1-10 11-20 21-21 >>  
 
1.
Healing Power of Crays; Theebine Farmer Expects to Make Product to Heal Spinal Columns
Newspaper article; The Gympie Times (Gympie, Australia), October 13, 2011
Subjects: Chitin, Farmers
...Expects to Make Product to Heal Spinal Columns. What is chitin? Chitin/Chitosan forms a base for the hard shell of crustaceans...approval stage to become a medical grade glucosamine and chitin supplier. The product has been perfected in the alaba...
2.
Mushrooms: Not Just Good, but Good for You as Well
Newspaper article; Daily Herald (Arlington Heights, IL), December 29, 2008
Subjects: Mushrooms
...mushrooms are made up of a substance called chitin and that is where the active polysaccharides are located. Chitin is a very hard, indigestible substance...polysaccharides; it simply makes smaller pieces of chitin and some feel that the grinding process...
3.
MEDICAL BATTLEFIELD; War Drives Miracle Advances, but Research Is Foundation
Newspaper article; The Washington Times, November 20, 2003
...material. Known as the chitosan bandage, it was derived from chitin, the main component in shrimp shells. Like many other emergency...inch-square bandage, which works primarily because the chitin, when treated, attracts red blood cells like a magnet and...
4.
Skeletons on the outside; Hard Outer Casing Protects the Soft Tissue of Arthropods
Newspaper article; The Washington Times, February 10, 2005
...densities that protect and support their soft tissue. These rigid shells are made chiefly of chitin, a polysaccharide similar to cellulose. Fibrous chitin strands are laid out in different directions, which helps the casings distribute stress more...
5.
Asthma Danger in Emptying Bins Just Once a Fortnight
Newspaper article; The Daily Mail (London, England), April 23, 2007
Subjects: Asthma
...blame for soaring rates of asthma, scientists believe. Called chitin, it is a type of sugar that toughens insect and crustacean...University of California, San Francisco have shown that exposure to chitin triggers an allergic inflammatory response in the lungs. UCSF...
More newspaper Results: 1-10 11-20 21-21 >>

Top...
 

encyclopedia articles on: Chitin  - 8 results

       More encyclopedia Results: 1-8 >>  
 
1.
Chitin
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
CHITIN kit n, main constituent of the shells of arthropods. Chitin, a polysaccharide (see carbohydrate ) analogous in...to form a long, unbranched chain. Like cellulose, chitin contributes strength and protection to the organism...
2.
Mucopolysaccharide
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...polysaccharides such as glycogen and starch . Chitin is a particularly plentiful mucopolysaccharide...invertebrate organisms contain mostly chitin complexed with inorganic salts. The copepods...considered to synthesize about 10 9 tons of chitin per year. Chitin is probably the second...
3.
Annelida
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...called setae, or chaetae, composed of chitin. Setae are used to grip the soil, to...with bundles of setae, usually made of chitin. Most errant polychaetes have well...composed of calcium carbonate rather than chitin and are hollow. These brittle setae are...
4.
Mite
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...in crevices and come out at night to suck blood. Hard ticks (family Ixodidae), which have thickened outer plates made of chitin , remain attached to the host for long periods. Ticks transmit Rocky Mountain spotted fever , tularemia , Lyme disease , equine...
5.
Fungi
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...multiple filaments, called hyphae, grouped together into a discrete organism called a mycelium. The cell walls of fungi are of chitin or other noncellulose compounds. In many ways fungi are more closely related to animals than to plants, and they have been...
More encyclopedia Results: 1-8 >>

Top...
 About Questia   ::   Privacy   ::   Contact