◆ SpookStack

sour taste. Srtuble in water, insoluble in alcohol, ether, and organic solvents; stable in acidic solutions: decomposes in alkaline solution. Derivation: Isolation from muscle tissue; yeast phos- horylation of adenosine. ise: Biochemical research. Commercially available as the disodium, dipotassium, ‘and dibarium salts. adenosine adenylic acid (adenosine monophosphate; A. AMP) phosphate: adenosinephosphoric ‘acid, CioHy.N:OrP. The monophosphoric ester of adeno- sine; i..., the nucleotide containing adenine, D-ribose and phosphoric acid. Adenylic acid is a constituent of ' many important coenzymes. Cyclic adenosine-3',5’ monophosphate is designated by biochemists as CAME (qv). Properties (muscle adenylic acid): Crystalline solid; m.p. 196-200°C. Readily soluble in boiling water. Gives only traces of furfural when boiled with 20% hydrochloric acid. (yeast adenylic acid monohydrate): Long crystalline i rods. Decomposes 195°C. Anhydrous form decom- poses at 208°C. Almost insoluble in cold water; slightly soluble in boiling. water. Gives quantitative yield of furfural when distilled with 20% HCL Derivation: Yeast adenylic acid by precipitation from yeast nucleic acid. Muscle aderylic acid by precipita- tion from tissues; by hydrolysis of ATP with barium hydroxide; by | enzymatic phosphorylation of adenosine Uses: Medicine and biochemical research. adhesion. The state in which two surfaces are held to- gether by 1 forces, which may consist of valence forces ot interlocking action, or both. (ASTM) adhesive. Any substance, inorganic or organic, natural ‘of synthetic, that is capable of bonding other sub- siances together by surface atiachment. A brief classification by type is as follows: 1. Inorganic 1. Soluble silicates (water glass) 2. Phosphate cements 3. Portland cement (calcium oxide-silica) 4. Other hydraulic cements (mortar. gypsum) 5. Ceramic {silica-boric acid) &. Thermosetting powdered glasses (“Pyroceram") Organic 1, Natural (a) Animal Hide and bone glue; fish glue Blood and casein glues (b) Vegetable Soybean, starch, cellulosics, rubber tatex and rubber-solvent (pressure-sensitive). Gums, terpene resins (rosin), mucilages (c) Mineral Asphalt, pitches, hydrocarbon resins 2. Synthetic {a) Elastomer-solvent cements (b) Polysulfide sealants (c) Thermoplastic resins (for hot-meits) Polyethylene, isobutylene, polyamides, polyvinyl acetate (4) Thermosetting resins Epoxy, phenolformaldehyde, butyral, cyanoacrylates. (©) Silicone polymers and cements Sce also following entries, For further information refer polyvinyl “ADIPOL™ to Adhesives Manufacturers Association, 441 Lexing- ton Ave. New York. ‘adhesive, high-temperature. (1) Organic polymers, e.g.. . polybentimidazoles, that retain bonding strength upto F for a relatively Jong time (500-1000 hours); above 500°F, strength drops rapidly, 80% being lost after 10 minutes at 1000° F. (2) Inorganic (ceramic), €-g., silica-boric acid mix- tures or cermets produce bonds having high strength above 2000°F; adhesive lap-bond strengths can be over 2000 psi at 1000°F. These adhesives are used largely for aerospace service, and metal/metal and glass/ metal seals, adhesive, hot-melt. A solid, thermoplastic material which quickly melts upon heating, and then sets to a firm bond on cooling. Most other types of adhesives set by evaporation of solvent, Hot-melt types offer the pos- sibility of almost instantaneous bonding, making them well-suited to automated operation. in general, they are low-cost, Jow-strength products, but are entirely adequate for bonding cellulosic materials. Ingredients of hot-melts are pofyethylene, polyviny! acetate, polyamides, hydrocarbon resins, as well as natural asphalts, bitumens, resinous materials, and waxes. Uses: Rapid and efficient bonding of low-strength materials, ¢.g., bookbinding, food cartons, side- Scaming of cans, miscellaneous packaging applica- tions. Sec also sealant. [resesie, rubber-based (cement, rubber). (1) A solution of natural or synthetic rubber in a suitable organic solvent, without sulfur or ozher curing agent; (2) mix- ture of rubber (often reclaimed), filler, and tackifier (pine tar, liquid asphalt) applied to fabric backing (pressure-sensitive friction tape), G) a room: temperature curing rubber-solveat-curative mixture, often made up in two parts, which are blended just before use; (4) rubber latex, especially for on-the-job repairing, such as conveyor belts; (5) silicone rubber cement (see “RTV™ and silicone (uses). Hazard: Those containing organic solvents, (1) and (3) above, are flammable. Shipping Regulations: Cement, liquid, n.0.s., (Rail) Red [__Bel. (Air) Flammable Liquid label. ‘diabatic. A process, condition, or operation during which there is no gain or loss of heat from the en- vironment. adipic acid (hexanediow acid; 1,4-butanedicarboxylic acid) COOH(CH;),COOH. Properties: Whit, crystalline solid. Mp, 1S2°C; bp. {100 mm) 265°C; sp. gr. (20/4°C) 1.360; flash point (closed cup) 385°F. Slightly soluble in water, soluble inalcohol and acetone, Relatively stable. Combustible; low toxicity. Derivation: Oxidation of cyclohexane, cyclohexanol, or eyclohexanone with air of nitric acid. Grades: Technical; F.C.C. Containers: Glass bottles, tins; $0-Ib multiwall paper bags, drums. Uses:' Manufacture of nylon and of polyurethane foams; preparation of esters for use as plasticizers and lubricants; food additive (neutralizer and favoring agent); adhesives. “Adipol.”> Trademark for plasticizers. a series of adipate Superior numbers refer to Manufacturers of Trade Mark Products. For page number see Contents.