Hair curl

The keratin of hair is essentially a bundle of long protein strands joined together by disulfide bonds. If these bonds are broken (reduced) by the addition of a thiol and the hair curled, the keratin chains slip past each other into a new configuration. When an oxidizing agent is added, new disulfide bonds are formed, thus stabilizing the new curled state. 

He slowly straightened himself and turned to look at her. The sweetest girl he d ever seen, her age lost between fifteen and twenty-five, fair hair curling buoyantly around her face as she looked down at him in concern. 

Products and Uses Utilized as an aerating agent, gas refrigerant, and spray propellant in cosmetics, after-shave lotions, deodorants, hair colorings, hair curling products, dandruff removers, and detergents. Used as a disinfectant, cleanser, sterilizer, for fungicide and mildew control, and others. 

Products and Uses The active chemical in depilatories (hair removers), permanent wave solutions, and hair-straightening products. Used in hair-curling, removing, and processing products. 

The increased interactions and film-forming properties also contribute towards styling effects. All-round bounce makes the hair appear vital and dynamically aesthetic. The bounce behavior of a hair curl can be determined in an automated test arrangement (Fig. 44) which investigates the torsional properties of hair fibers (bending modulus) and hair curls (stretch forces, attenuation, frequency, and amplitude of oscillation). 

Uses Wetting agent, detergent emulsifier for deodorants, conditioners, hair curling prods. 

Depending on the type of waving product used, there may be several variations to the procedure outlined above. Thus, instead of wrapping with lotion, the hair is wound wet and the lotion appHed to curled hair. Some instmctions also suggest a creep stage for better tightness and durabiUty. This is simply a 30 min wait between rinsing off the lotion and appHcation of the neutralizer. 

From the hair-pencils of butterflies in Danainae and Ithomiinae (Papilion-oidea Nymphalidae), a wider variety of pyrrolizines (la-d, and 6a-d) have been identified than from Arctiidae moths. These compounds are biosynthesized from pyrrolizidine alkaloids, which are included in host plants fed by the larvae and protect them from the attacks of other herbivores [122]. In addition to novel lactones (7, 8a, and 8b) derived from an acid part of the alkaloids, many volatiles of more than 100 compounds (aromatics, terpenoids, hydrocarbons, and others) constitute scent bouquets of the male butterflies [123]. For example, the hair-pencil of Idea leuconoe (Danainae) which is distributed in South-East Asia contained 16 compounds (6b, 8a, 8b, 9, and others), and a mixture of the major volatiles applied to a butterfly dummy elicited an abdomen-curling acceptance posture in the females as a crude extract of the male hair-pencils did [ 124]. A chiral GC analysis revealed the absolute config-... 

A product used in upholstery and as a resilient packaging material. It is made by spraying a loose mat of curled animal hair with latex and applying heat to vulcanise the rubber. The resilience of the product comes from the fibres, the junction points of which are anchored by the rubber. 

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