Términos

Estampas japonesas en que numerosos bloques eran empleados para imprimir muchos colores.

Se refiere al estilo y cultura de Nisqually, un pueblo que alguna vez dominó la zona del río Snoqualmie en el centro-oeste de Washington.

A salt or ester of nitric acid.

Polvo venenoso, corrosivo, amargo, blanco y cristalino, soluble en agua, AgNO3, producido por reacción de la plata con el ácido nítrico diluido. Se utilizó fundamentalmente en la manufactura de emulsiones fotográficas y espejos.

A compound in which nitrogen is paired with a more electropositive element, such as silicon, boron, and most metals.

Refers to any salt or ester of nitrous acid.

Substance comprising a mixture of nitric esters of cellulose and a highly flammable compound containing more than approximately 12.5 percent nitrogen. Nitrocellulose is a fluffy white substance that retains some of the fibrous structure of untreated cellulose. It is not stable to heat and will ignite easily. It was first introduced in the 19th century as an explosive. It was used to produce animation cels for 80 years until acetate was introduced as a safer medium in the 1950s. Cellulose nitrate was often used for clear lacquers, fabric dopes, adhesives, high-gloss paints, and mixed with natural resins (dammar, shellac, copal, etc) to create a waterproof varnish. Cellulose nitrate is inherently unstable and slowly decomposes at room temperature.

A toxic and reactive reddish gas, NO2, nitrogen dioxide is an atmospheric pollutant (as in photochemical smog) produced by combustion of fossil fuels. Exposure to nitrogen oxide can cause fading of dyes and organic colorants in paints, textiles, and photographs, as well as deterioration of calcareous stone.

Used in an ecological context to describe a large class of nitrogen oxide gases produced in combustion which occur as atmospheric pollutants. Colorless, poisonous gas formed when nitric acid reacts with copper or when ammonia reacts with platinum. It is produced in combustion engine processes such as automobile emissions, resulting in acid rain and photochemical smog. It is also an important messenger molecule in mammals and other animals, produced through cellular metabolism, and involved in oxygen transmission, blood pressure regulation, and other physiological activities.

Un elemento con número atómico 7 y símbolo: N. Es un elemento inodoro, gaseoso que compone el 78% de la atmósfera de la tierra, es un constituyente de todos los tejidos vivos, y es casi inerte en su forma gaseosa.

Un explosivo en forma de líquido oleoso, utilizado principalmente como un ingrediente en la dinamita, pero también como un vasodilatador en casos cardíacos. También utilizado en algunos propulsores, para cohetes y misiles.

Any of a class of solvents which has an electronegative nitro group attached to a methane, ethane, or propane molecule. They are also known as nitroalkanes. Nitroparaffins are versatile compounds. They are used as solvent additives in coatings; as a solvent in separation processes; as chemical stabilizers and intermediates; as a component in fuels; to displace water from metal surfaces.

Artefactos que consisten en niveles de burbujas colocados dentro de barras de madera o metal y usados para determinar o fijar la horizontalidad o verticalidad de objetos o superficies.

Tres niveles separados montados en una barra recta de madera o metal de aproximadamente cuatro pies de longitud; usados para determinar líneas a nivel o a plomo.

Instrumentos de agrimensura usados para determinar una elevación relativa, generalmente compuestos de un telescopio sujeto firmemente a un eje vertical, pudiendo por lo tanto tener sólo movimiento giratorio horizontal.

Artefactos para determinar los verdaderos ángulos horizontales o verticales mediante el centrado de una burbuja en un tubo de vidrio o caja circular casi llena de alcohol o éter.