Rejuvenating

The smoothing or emoUient properties of creams and lotions are critical for making these emulsions the preferred vehicles for facial skin moisturizers, skin protectants, and rejuvenating products. On the body, emoUients provide smoothness and tend to reduce the sensation of tightness commonly associated with dryness and loss of Hpids from the skin. Although a wide variety of plant and animal extracts have been claimed to impart skin benefits, vaUd scientific evidence for efficacy has been provided only rarely. 

At low (>450° C) temperatures, the presence of these materials, particularly the oxides, leads to simple masking or fouling. In some cases, a catalyst that shows reduced activity beheved to be from poisoning may simply be masked, and activity can be rejuvenated by cleaning with aqueous leaching solutions (21). 

Rejuvenation of Used Turbine Biades Nature of Service Damage in Turbine Biades... 

Figure 21-13) clearly show that the HIP-processed material is superior to both commercial and laboratory conventional reheat-treated material. Cost estimates indicate that used blades can be rejuvenated at a fraction of the cost of a new set of blades. 

VanDrunen, G., and Liburdi, J., Rejuvenation of Used Turbine Blades by Host Isostatic Processing, Proceedings of the 6th Turbomachinery Symposium, Texas A M University, pp. 55-60, 1977. 

Regenerant The solution used to restore the activity of an ion exchanger. Acids are employed to restore a cation exchanger to its hydrogen form brine solutions may be used to convert the cation exchanger to the sodium form. The anion exchanger may be rejuvenated by treatment with an alkaline solution. 

Exciting developments have occurred in the coordination chemistry of the alkali metals during the last few years that have completely rejuvenated what appeared to be a largely predictable and worked-out area of chemistry. Conventional beliefs had reinforced the predominant impression of very weak coordinating ability, and had rationalized this in terms of the relatively large size and low charge of the cations M+. On this view, stability of coordination complexes should diminish in the sequence Li>Na>K>Rb> Cs, and this is frequently observed, though the reverse sequence is also known for the formation constants of, for example, the weak complexes with sulfate, peroxosulfate, thiosulfate and the hexacyanoferrates in aqueous solutions. 

Verjauchung, /. putrfaction. verlUngen, v.t. reduce, diminish, contract, constrict, narrow taper rejuvenate, renew. Verjungimg, /. diminution, reduction, taper, (of a tube) constriction rejuvenation, regeneration. 

Medium acid baths, pH 4-5 At this acidity a dichromate solution plus sulphate ion as activator is sufficient to deposit chromate films in 30 min or so at room temperature or in a few minutes at boiling point. Unfortunately, a solution of alkali dichromate and alkali sulphate is quite unbuffered, and other substances must be added to give the bath a useful life over the working pH range. Acetates have been used successfully, but salts of aluminium, chromium, manganese and zinc have been more commonly employed. The pH of the solution rises slowly during use until basic chromates or sulphates begin to precipitate. The solution can then be rejuvenated by the addition of chromic or sulphuric acid or acid salts. 

Chan CS, Guzman JN, Ihij ic E, Mercer JN, Rick C, Tkatch T, Meredith GE, Sunneier DJ (2007) Rejuvenation protects neurons in mouse models of Parkinson s disease. Nature 447 1081-1086... 

Unsafe in Fitzpatrick skin type more than V Cannot be used in summer Resorcinol may be a sensitizing agent Additional histological studies are necessary to understand the mechanism of action in facial rejuvenation... 

Fitzpatrick RE, Rostan EF (2002) Double blind, half-face study comparing topical vitamin C and vehicle for rejuvenation of photodamage. Dermatol Surg 28 231-236... 

In-situ ultrasonic catalyst rejuvenation in three-phase hydrogenation of xylose. Chem. Eng. Sci., 54, 1583-1588. 

Rejuvenative. Elderberry wine and jam have long been given to the elderly to help them feel younger. Parts used flowers, berries. 

Restorative. Rejuvenating to both body and mind, elderberries are a restorative tonic for building the blood back up after childbirth. Elder flowers taken as a tea or snuffed up the nose may also help to restore the sense of smell. Elder flower tea has also been used to restore a person who has fainted. Parts used flowers, berries. 

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