enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Chitin - Wikipedia

    en.wikipedia.org/wiki/Chitin

    Chitin (C 8 H 13 O 5 N) n (/ ˈ k aɪ t ɪ n / KY-tin) is a long-chain polymer of N-acetylglucosamine, an amide derivative of glucose. Chitin is the second most abundant polysaccharide in nature (behind only cellulose); an estimated 1 billion tons of chitin are produced each year in the biosphere. [1]

  3. Arthropod exoskeleton - Wikipedia

    en.wikipedia.org/wiki/Arthropod_exoskeleton

    Arthropod cuticle is a biological composite material, consisting of two main portions: fibrous chains of alpha-chitin within a matrix of silk-like and globular proteins, of which the best-known is the rubbery protein called resilin. The relative abundance of these two main components varies from approximately 50/50 to 80/20 chitin protein, with ...

  4. Chiton - Wikipedia

    en.wikipedia.org/wiki/Chiton

    The sea snail Nerita textilis (like all gastropods) deposits a mucus trail as it moves, which a chemoreceptive organ is able to detect and guide the snail back to its home site. [31] It is unclear if chiton homing functions in the same way, but they may leave chemical cues along the rock surface and at the home scar which their olfactory senses ...

  5. Insect morphology - Wikipedia

    en.wikipedia.org/wiki/Insect_morphology

    In the anatomy of some taxa, such as many Cicadomorpha, the front of the head is fairly clearly distinguished and tends to be broad and sub-vertical; that median area commonly is taken to be the frons. [9] The clypeus is a sclerite between the face and labrum, which is dorsally separated from the frons by the frontoclypeal suture in primitive ...

  6. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...

  7. File:Chitin glucose and cellulose.svg - Wikipedia

    en.wikipedia.org/wiki/File:Chitin_glucose_and...

    English: 1.The transition between glucose and N-Acetylglucosamine 2. The polymerization of N-Acetylglucosamine to chitin 3.The polymerization of glucose to cellulose. Glucose changes depending on what form it takes, glucose is the basis of both chitin and cellulose and the only difference between the two types is what form glucose takes in each pol

  8. File:Chitin.svg - Wikipedia

    en.wikipedia.org/wiki/File:Chitin.svg

    The following other wikis use this file: Usage on ar.wikipedia.org كايتين; استخدام أسيتات الكايتين لالتقاط غاز ثاني أكسيد الكربون والحد من التلوث

  9. Mollusc shell - Wikipedia

    en.wikipedia.org/wiki/Mollusc_shell

    However, a growing body of molecular and biological data indicate that at least certain shell features have evolved many times, independently. [40] The nacreous layer of shells is a complex structure, but rather than being difficult to evolve, it has in fact arisen many times convergently. [ 40 ]