Age spots form when the skin produces an excess amount of pigment called melanin. This pigment is what gives your skin its normal color. Age spots are also called liver spots and sunspots and are usually flat brown or black spots on the areas of the skin that are most often exposed to the sun such as face‚ shoulders and forearms. They can also form when the skin is exposed to artificial tanning such as heat lamps and tanning beds. Age spots may develop on younger people if they spend a lot of time
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Bioenergetics Photosynthesis & Respiration Laboratory Report Exercise 6 PBIO101 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Gina Dedeles Minda Dimaano-Kho Group 5 Felicita‚ Haniel Paulo‚ Gisselle Mildred V. Aniseta‚ Carmelus*Absent but present
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The Integumentary System Introduction I. Skin and Its Tissues A. Introduction 1. The skin is composed of several kinds of tissues. 2. Skin is a protective covering that prevents many harmful substances from entering the body. 3. Skin also retards water loss and helps regulate body temperature. 4. Skin houses sensory receptors and contains immune system cells. 5. Skin synthesises vitamin D and excretes a small amount of waste products. 6. The two distinct layers of skin
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Fragment of a Painted Assyrian Relief. This piece‚ made by the Akkadian culture during the Mesopotamia Era‚ is approximately 10 3/8 x 5. 1 ¾ inch in size. This fine‚ yet very ancient‚ work is crafted out of limestone. Fine‚ durable‚ brown stone and red pigment‚ it is especially found in Northern Iraq. Having a short written record‚ this relief sculpture once formed part of a much larger composition‚ and it depicts the head of an Assyrian sovereign‚ probably Sargon. In fact‚ the stone head of Sargon contains
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external factors such as bacteria‚ chemicals‚ and temperature. The skin contains secretions that can kill bacteria‚ and the pigment melanin provides a chemical defense against ultraviolet light that can damage skin cells. The skin also helps control body temperature. A layer of cells between the epidermis and the dermis called melanocytes produce a brown-black skin pigment called melanin. Melanin determines the color of the skin‚ eyes‚ and hair. Melanin also helps protect against the damaging rays
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They all have the same theme: geometric forms associated with mental imagery such as grids‚ stars‚ dots‚ and meandering lines or fantastic creatures‚ birds‚ and horned anthropomorphs. The inside of the objects are light but are traced by darker pigments around the outside. These rock art paintings of the Chumash do not tell a story and were not used for conveying a message to the public. Since the art is so contrived and jumbled together with no rhyme or reason‚ it is believed that the art was
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 Chauvet Cave Horses The expression of “cave painting” usually refers to drawing‚ stencil art and painting on the walls and ceilings of prehistoric caves of the Stone Age. Evidence indicates it began during the Aurignacian period (around 30‚000 BC) but reached a highpoint during the late Magdalenian period. The most spectacular examples of this rock art have been discovered in France and Spain‚ where archeologists have found some 350 caves containing Paleolithic artworks‚ but
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spinning diamond fraise wheel or a wire brush 3. Laser vaporization-burning out the skin 4. Chemical peels B. Side affects of tattoo removal without a laser 1. Dermabrasion has a high risk of scarring and loss of normal skin pigment- Severely painful 2. Risk of infection 3. All methods are very
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Samples (Potato‚ Banana‚ Apple) Enzymatic Browning: Enzymatic browning (oxidative) is a reaction between oxygen and a phenolic substrate catalyzed by polyphenol oxidase result in orthoquinone‚ which in turn rapidly polymerized to form brown pigments or melanin. This is the common browning that occur in cut fruits and vegetables [pic] Phenolase enzymes that have been isolated from food sources are oligomers and contain one copper prosthetic group per subunits. Thus‚ if damage to plant tissue
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the ground for the mural scheme including in composition lime and inert materials like tow (An analysis and further characteriza-tion of these two plaster layers is dis-cussed). Pigments were executed in oil painting. Oil paintings are directly execut-ed on dry plaster. Drying oils have been used as binding media for pigments in wall paintings in the Krabia School. Oils form solid film layers by reacting with the
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