TOOTHBRUSH

The utilities in our modern society are so much a part of our lives that it is hard to imagine how we survived without them. An electric power plant generates electricity to heat and light our homes in addition to providing power for the television, refrigerator, and electric toothbrush. When our homes were heated with wood fires, home-made candles were used... 

Cellulose Propionate H All conventional processes Toys, pens, aitomo-tive parts, radio cases, toothbrushes, handles... 

Bathrooms shower attachments, taps, chains, handles, locks, holders for soap and toothbrushes, mirror surrounds. 

Use a soft toothbrush when cleaning the teeth and an electric razor for shaving. 

D. Use a hard bristle toothbrush to tiio roughly cleanse the mouth and teeth of debris. 

Toothpaste must have thickeners to help it squeeze out of the tube and stay on the toothbrush. It must have detergents to remove fatty films, water softeners to make the detergents work better, and sweeteners (preferably non-nutritive so as not encourage bacteria). 

Obviously, there exists severe interplastics competition, e.g. PP vs. ABS, clarified PP vs. PS, PA, PVC, HDPE and PS (Table 10.7). A wide range of cross-linked and thermoplastic elastomer applications, from footware to automotive parts and toothbrushes, are adopting new metallocene-catalysed polyolefin elastomers (POEs). These low-density copolymers of ethylene and octene were first accepted as impact modifiers for TPOs, but now displace EPDM, (foamed) EVA, flexible PVC, and olefinic thermoplastic vulcanisates (TPVs). Interpolymer competition may also result from... 

I hold on to my bag. I can manage, thank you. Besides, it s only a toothbrush and clean knickers. Not heavy... Is it really necessary to sell the workshop I continue, as we shoulder our way through the crowds on London Road. You should have seen him. I don t want to be melodramatic, but I honestly think it would be the death of him. ... 

David A. Hounshell and John Kenly Smith, Jr. The Nylon Drama. American Heritage of Invention and Technology. 4 (Fall 1988) 40-55. Source for condensation removing water 12,000 molecular weight patent argument and toothbrushes. 

The White-Bright Toothbrush Company hired 30 new employees. This hiring increased the company s total workforce by 5%. How many employees now work at White-Bright ... 

You can get really strange results if your boards are not clean. Always take the effort to use a toothbrush with isopropyl alcohol. But note that sometimes water is also necessary. Clean the board in running water, but dry it properly before using (maybe in a warm oven). That way both organic and inorganic impurities are dissolved. 

Electric toothbrushes are commonly used in tougher environments than many other consumer household items. In the bathroom, they may be dropped several feet, they are exposed to human saliva (acidic) and various tooth pastes (generally alkaline), they have to withstand hot and cold water and are expected to survive for many years. 

Another approach, which has met with wide approval, has been the use of a reed switch/magnet combination. The magnet is moulded into a plastic sliding device that can move up and down, a reed switch that senses the position of the magnet is mounted on a pc board inside the electric toothbrush. In the down po-... 

Using this latter approach, the electric toothbrush is able to achieve many years of operation without failure because it is designed to withstand the rigors of its normal environment. 

These bonded phases are found to be fairly stable between the pH range 2 to 9 and upto temperatures of about 80 °C. The nature of the R group of the silane solely determines the surface polarity of the bonded phase. A fairly common bonded phase is made with a linear C18 hydrocarbon, also known as ODS (octadecyl silane) bonded phases, wherein the groups appear to be protruding out from the silica particle surface just as the bristles on a toothbrush. It takes care of almost 75% of the samples in HPLC. 

PBT is easily made into fiber and monofilament and has been used in some fiber applications. For example, PBT fibers are used commercially as toothbrush bristles. Compared to PET, PBT fiber is more resistant to permanent deformation. Compared to nylon, PBT shows almost no change when exposed to moisture. PBT shows much more resistance to staining than nylon and can be colored by the use of pigments. However, PBT is more difficult to color by solution dying than nylon. PBT is not typically used in textile applications due to its perceived high price. 

Domestic appliance housings, vacuum cleaners, small appliances, food mixers, electric shavers, electric toothbrushes. .. 

Tableware, drinking tumblers, cutlery, jars and beakers, storage containers for foods... Bathroom fittings, electric toothbrushes, toothbrush handles, sanitary ware, soap dispensers, shower cubicle, shelves...

Touch your head you re touching a polymer— your hair Polymers are in plastic milk cartons, bicycle helmets, tires, playground balls, cotton, wood, tennis shoes, and your toothbrush. 

Apraxia is an inability to carry out coordinated physical activity. This occurs despite no paralysis or weakness. It is believed to result from a decline of visual and spatial abilities. Early in the illness, demented patients may have problems drawing three-dimensional figures. As the illness progresses, they may get lost in familiar neighborhoods or forget how to use a common object like a toothbrush or a hammer. With certain types of dementia they may even forget how to walk (gait apraxia). 

Q81 Soft-textured toothbrushes are more efficient in removing plaque than medium-textured brushes. Hard-textured brushes may cause gingival trauma. 

While other organic esters are commercially available, namely cellulose butyrate and cellulose propionate, by far the most widely used is cellulose acetate, which is available as plastics, in films, sheets, fibers, and lacquers. Cellulose acetate is used in the manufacture of display packaging and as extruded film for decorative signs, and to coat a variety of fibers. Injected molded products include toothbrush handles, combs, and brushes. It is also used in lacquers and protective coatings for metal, glass, and paper. Cellulose acetate films are used in reverse osmosis to purify blood, fruit juices, and brackish water. Some eyeglass frames are... 

The most common method of eliminating gingivitis is by the mechanical removal of the microorganisms found in dental plaque via toothbrush and floss. However, effective mechanical removal of plaque is a tedious, time-consuming process that is affected by an individual s gingival architecture, tooth position, dexterity, and motivation. Consequently, incomplete removal... 

One contributor to this risk of fluorosis in children is the lack of control in the swallowing reflex, particularly in children younger than 3 years of age [96], Children are also known to like the taste of toothpaste, and hence to swallow it deliberately. A small toothbrush of the size appropriate for use by a child holds in the region of 0.75-1.0 g of toothpaste, which means that an individual blob of toothpaste provides between 0.75 and 1.0 mg of fluoride. It has been estimated that children below the age of six swallow a mean of 0.3 of toothpaste per brushing and this may be sufficient to lead to ingestion of enough fluoride to cause the mottling associated with fluorosis [97]. 

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