Page 1 of 8 - About 73 Essays
  • Case Study: Horseshoe Crab

    Nano-crystalline) Dental pulp at the centre of the tooth- highly vascularized with nerves and cells, containing type 1 collagen Hippo Tooth The hippo tooth has a strong compressive modulus. The dentine within the tooth is demonstrated to have an effective crack arrest. Warthog Tusk Warthog tusks have dentil tubules that extend from enamel and dentil. They have excellent tensile strength in the longitudinal direction. Toucan and Horned Billed Beaks Toucan and Horned Billed beaks have an ingenious sandwich structure. They are light weight, containing an internal foam core made from bone. It is an extension of the bird skull, and is also hollow within the middle. The toucan bill is made of multiple layers of keratin tiles. The mechanical properties of the keratin are based on the high moisture content. It has very high tensile strength, but tends to decrease in strength as humidity increases. This therefore reduces its mechanical properties at high temperatures. The toucan hornbill contains a cell foam, that contributes to the stiffness of the structure. Sponges and Spicules Sponges and Spicules are known for their outside flexibility and toughness, as well as their multi function as a light weight material. They are found at the base of the silica basket. They are often subject to mechanical stresses at the sea floor, therefore they are mechanically strong. The onion like layered shape of the sponge, helps arrests the cracks as well as increases its flexural strength.…

    Words: 1302 - Pages: 6
  • Illnesses In Fingernails

    Fingernails are capable of showing sicknesses or diseases that are happening inside the human body. The plate of the nail is made of a protein named “keratin” which is transparent and flexible but durable enough to retain a shape and protect the nail bed. Underneath the nail plate is the nail bed which is composed of two parts, the dermis and the epidermis. The purpose of the nail bed is to house the nail matrix, which grows the nail and stabilize the nail’s foundation. The nail plate and nail…

    Words: 993 - Pages: 4
  • Acne Vulgaris Essay

    1.1 Background Our skin comprised of two main parts – epidermis and dermis. Epidermis is the superficial and thinner portion which serves to protect the skin and underlying tissues from abrasions, heat, microbes and chemicals. The deeper and thicker connective tissue portion called as dermis hosts several accessory structures of the skin like hair follicles, oil (sebaceous) glands and sweat (sudoriferous) glands. Sebaceous glands secrete greasy substances called sebum that will moistens the…

    Words: 1213 - Pages: 5
  • Analysis Of Keratin From Chicken Feather

    2. Materials and Methods: The keratin was extracted from Chicken feather which were collected from the local market of Raipur (21.14°N 81.38°E) Chhattisgarh, India. The 91% food grade alginate (sodium salt form) was purchased from Loba Chemie. The β-mercatpoethanol (mol. wt. 78.13) from LOBA Chemie, sodium dodecyl sulfate (SDS) (mol. wt. 288.38) and urea (mol. wt. 60.06) was purchased from Merck, and ethanol was purchased from Sigma-Aldrich. Antimicrobial strain of gram negative bacteria…

    Words: 823 - Pages: 4
  • Barrier Of Skin Essay

    layers called stratum basale, stratum spinosum, stratum granulosum and stratum corneum.According to article of skin function and structure from washington, occurance of skin dryness, its actually begin from stratum corneum layer which known as final outcome of keratinocyte maturation. To be detailed, stratum corneum is made up of corneocytes and this corneocytes is surround by protein envelope and filled with water retaining keratin adding the strength of protein.Protein helps keep skin hydrated…

    Words: 923 - Pages: 4
  • Bee's Hair Case Study

    cannot be determined nor measured at this time because those are factors falling under the quantitative data range. Q2. Hair is made up of Keratin. Sulfurous amino acids, biotin, and vitamin A are all examples of protein which keratin supports. Carbohydrates have monomers, which are organic compounds within keratin. Nucleic acids represent identical polypeptides, as a form of cytoskeletal keratin expression. Lipids are fats within keratin. How much of it, numerically, is inconclusive at this…

    Words: 1298 - Pages: 6
  • White Sponge Nevus Case Study

    Radiol Endod 2007;103:43-7 3. Martin S. Greenberg, Michael Glick, Jonathan A. Ship. Burkit’s Oral Medicine Eleventh Edition: 77-106 4. Frithiof L, Banoczy J. White sponge nevus (leukoedema exfoliativum mucosae oris): ultrastructural observations. Oral Surg 1976; 41: 607–622. 5. Van Muijen GN, Ruiter DJ, Franke WW et al (1986). Cell type heterogeneity of cytokeratin expression in complex epithelia and carcinomas as demonstrated by monoclonal antibodies specific for cytokeratins nos. 4 and 13.…

    Words: 1577 - Pages: 7
  • Essay On The Integumentary System

    epithelium and serves to protect the skin from abrasion and prevent the loss of water through the skin (Vanputte, Regan, & Russo 142). The most abundant cell of the epidermis is the keratinocyte. Keratinocytes function to produce the protein keratin which gives the epidermis its durability (Vanputte, Regan, & Russo 142). Other cells of the epidermis include: melanocytes that produce melanin, the pigment responsible for skin color; Langerhans cells that assist the immune system; and Merkel…

    Words: 1121 - Pages: 5
  • Integumentary System Research Paper

    Apocrine Glands- The apocrine glands work the armpit and genital body parts. Compared to the eccrine glands, the apocrine glands are superior. The job of the apocrine glands is to release inside the hair follicles. • Key physiological functions – The purpose of the integumentary system is to protect deeper tissues in the human body from: 1. Mechanical damage - Mechanical damage, which causes bumps has keratin to signal the nervous system in case of damages. 2. Chemical damage- Chemical…

    Words: 1181 - Pages: 5
  • Chicken Feathers Lab Report

    Abstract: Every year, more than 11 billion pounds of unused feathers result from the poultry industry worldwide, which in effect impose a difficult disposal process to the environment. Chicken feathers are an abundant, inconvenient and troublesome waste product from the poultry industry that can be utilised as a source of keratin. In addition to keratin, feathers contain other fatty and waxy substances. An original chicken feather contains many biological organisms…

    Words: 381 - Pages: 2
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