What is hair?.txt

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What is hair?.txt
2012-09-23 18:48:19

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  1. Hair shaft
    Portion of hair that extends above the epidermis
  2. Cuticle
    Outer most layer of hair, directly related to porosity
  3. Porosity
    The ability to absorb moisture
  4. Cortex
    Middle layer of hair
  5. Medulla
    Inner most layer of the hair
  6. Atom
    Smallest unit of an element
  7. Of 106 the 5 elements related to hair
    Carbon, oxygen, hydrogen, nitrogen, sulfur
  8. Molecule
    Cluster of atoms linked together
  9. Amino acids
    Cluster of molecules linked together
  10. There are ____ known amino acids _____ of which are found in the hair
    26, 19
  11. Peptide and polypeptide chains
    Chains of amino acids that are linked together
  12. Hydrogen bonds
    Weakest of 3, effected by heat and water, when the bond is changed it's temporary
  13. Salt bonds
    Weak bond, effected by changes in pH, change is temporary
  14. Disulfide bonds
    Strongest of 3, effected by chemical reaction, change is permanent
  15. Protein
    Hair is made up of 80% protein, helps with strength and resilience
  16. Moisture
    Hair is made up 10-15% moisture, helps with softness and flexibility
  17. Lipids
    Hair is made up of 3-6% lipids, helps with smoothness and sleekness
  18. Pigment
    Hair is made up of 1% pigment, it absorbs uv rays and adds color
  19. Eumelanin
    Brownish- violet in color, more dominant in brown and black hair tones
  20. Pheomelanin
    Reddish-orangish in color, more dominant in ginger red or auburn hair
  21. Minerals and carbohydrates
    The remaining percentage is made up of minerals and carbs, bonds the moisture and proteins together
  22. 1. Tint___% 2. Decolorizer___% 3. Hi-lift___% 4. Perm___% 5. Chemical relaxer___%
    1. 15% 2. 20% 3. 20% 4. 30% 5. 35-45%
  23. Density
    Amount of hairs per square in. Often referred to as the thickness or thinness of someone's hair, not to confused with texture
  24. Texture
    Diameter of an individual strand of hair often referred to as the coarseness or fineness of someone's hair
  25. Elasticity
    The ability of someone's hair to stretch and return without breaking, overly elastic hair could mean extra protein is required, non elastic could mean extra moisture is required
  26. Porosity
    The ability to absorb moisture, the cuticle is directly related to porosity
  27. pH
    potential hydrogen, unit of measurement, measures acidity or alkalinity of a water based solution, the pH scale is logrhythmic which means each number on the scale represents a 10 fold change in acidity or alkkalinity
  28. Acid
    0-6.9, contracts and hardens the hair
  29. Alkali
    7.1-14, softens and swells the hair
  30. Neutral
    7, distilled water is considered neutral, neither acidic nor alkaline
  31. Anagen
    active growth phase of follicide, stays in the phase for 2-6 years
  32. Catagen
    short transition phase, starts at the end of the anagen phase, end of active growth of hair, 2-3 weeks
  33. Telogen
    resting phase of follicle, 10-15% of hair is in this stage, lasts for 100 days on the scalp and longer on eyebrows and legs, 25-100 telogen hairs are shed daily
  34. Sterilization
    Kills ALL organisms on a surface, used in hospitals
  35. Disinfection
    Kills MOST organisms, used on non-porous surfaces in salons, not to be used on skin
  36. Sanitation
    Removes dirt to prevent growthh of microbes, does not kill germs
  37. Antiseptic
    Prevents growth of microorganisms on the skin, topical agents applied to hands
  38. Barbicide
    used on combs, clips or non porous implements, etc.
  39. Bleach
    For surfaces and floors
  40. Hand sanitizers
    antiseptics, soaps
  41. Alcohol
    use on implements or to wipe surfaces
  42. OSHA
    occupational safety and healt administration, regulates and enforces safety and health in the work place