◆ SpookStack

Seyeceess Sewer t= FReme “NU-PON” actors to provide heat for desalination of sea water and generation of electric power. “Nu-Pon."“ Trademark for epoxy resin primers and enamels for household appliances, meta! products, and corrosion-resistant applications. “Nuroz."” Trademark for a polymerized wood rosin. Uses: Adhesives; gloss oils; paper label coatings; oleoresinous varnishes; solder flux; spirit varnishes, waxed paper and hot melt compounds; synthetic res- ins eet rk fot nickel-plating additive, “Nuso.”’' Trademark for highly aromatic oils used as resin plasticizers. Nusselt number. A value used in heat transfer studies ‘and calculations to compare heat losses by conduc- tion from various shaped objects under various condi- tions. It combined into a single number the actual heat loss (Q), the temperature difference (AT) be- tween the body and its surroundings, the size (d) and shape of the body and the thermal conductivity (k) of the fluid surrounding the object, in the equation Nu = Qd/ATk. “Nuto.”*! Trademark for fubricating oils of good color and high resistance to oxidation; recommended for circulating and hydraulic systems. “Nutralac."“* Trademark for a hydrated compound consisting of sodium carbonate and sodium bdicar- bonate. Uses: Dairy and food industry for neutralizing acidity in cream’ and related foods; di.iwashing prepa tions; leather tanning, and textile processing. nutrient. Any element or compound that is essential to the life and growth of plants or animals, either as by chemical or enzymati include rea In plants, ts 7 U5 eral elerents as well as nitrogen, carbon dioxide and water. 1. animals and man the primary nutrients are the proteins, carbohydrates and fats obtained from plants, either directly or indirectly, supplemented by vitamins and minerals. Water and oxygen are in- cluded in this definition. All told, there are 43 basic nutrients. See also food. nutrient solution. A water solution of minerals and their salts necessary for plant growth which is used instead of soil, the plants being supported by me- chanical means. Such solutions contain combined nitrogen, potassium, phosphorus, calcium, sulfur, Py ron, bo! Zinc, and copper. They are extensively used for com- mercial growing of flowers and vegetables particu- larly on islands, and also to some extent for house plants. . nutrification. Addition of nutrients to 2 food either to replace those lost in processing (restoration), to pro- vide nutrients that are not normally present in the food (fortification), or to bring the food into con- formity with a specific standard for that food. tutrition. The effects of nutrients on living organisms and the biochemical mechanisms involved in bringing them about; also, that subdivision of biochemistry which deals specifically with these effects. In plant nutrition the essential requirements are carbon diox- ide and water, from which the plant forms carbo- hydrates by photosynthesis (q.v.); nitrogen, which is essential for the synthesis of proteins By the plant, with the aid of nitrogen-fixing bacteria; as well as phosphorus, calcium, potassium and a number of trace elements (micronutrients). Besides proteins and carbohydrates, plants also synthesize vitamins and various fats and oils. Thus they provide a basis for human nutrition, both directly (grain and other vege- tables) and indirectly (meats and dairy products), though the conversion to protein values Or human nutrition is only about 10% for meats. Human diet requires proteins (milk, eggs, fish and some vegetables); carbohydrates (plants), fats (oils) from both plants and animals; minerals from milk and meats; salt (chioride); vitamins from green vege- tables and citrus fruits; and water. Micronutrients are furnished by sea food, cereals, vegetables, and fruit. Human digestive processes involve primarily the hydrolysis of complex carbohydrates to simple sugars, of proteins to a mixture of amino acids, and of fats to glycerol and higher fatty acids. Hydrolysis is cat- lyzed by various enzymes (q.v.) in the saliva and igestive tract. The end products of digestion are absorbed across a semipermeable membrane in the intestine and thus enter the blood stream, unusabic products being eliminated. The efficiency of diges- tion plus absorption is about 92% for protein, 95% for fat and 98% for carbohydrates. See also metabo- lism; digestion (1); plant (1); nutrient, RDA. nut shells. In a fine-ground state the shells of coco- nuts and other nuts are a source of decolorizing car- bon; the pits of peaches and similar fruits have been used for gas-adsorbent carbon. nx vomica, See strychnine. “Nu-Z."” Trademark for a fine cream-white powder 2 foliar application to in animal assaying 52% zinc. Used correct zinc deficiencies nutrition, in plants, an "acid. See I-naphthol-4-sulfonie acid. “Nydrazia.”*"? Trademark for isoniazid (q.v.). “NyeBar."“ Trademark for a liquid applied around Oiled areas to retard oil spreading. A solvent evapo- rates leaving a polymer film across which lubricants do not spread or creep. “NyeFret.“? Trademark for a dolphin oil lubricant which reduces fretting corrosion for small springs and other instrument components. Viscosity 6 centi- stokes at 100°F. “NyeSolve."“ Trademark for a nonflammable, low- toxicity solvent for cleaning oils and oil-heid soils from fine instruments. “Nylafil.”*” Trademark for glass fiber-reinforced nylon. + aylidrin hydrochloride HOC.HCH(OH)CH(CH)- NHCH(CH)(CH:2G.HjHCI._ para-Hydroxy-alpha- (-(-tnethyl-3-phenyFpropylamino)}-ethyl] benzyl al- Coho] hydrochloride. Properties: White, odorless, tasteless, crystals or powder; slightly soluble inwater, alcohol; very slightly Soluble ‘in chloroform, ether; pH of 1% solution is between 4.5 and 6.5. Grade: N.F. Use: Medicine (treatment of heart disease). nylon, Generic name for a family of polyamide poly- mets characterized by the presence of the amide group —CONH. By far the most important are nylon