Términos

Designa una estructura alta, generalmente cilíndrica, en la que se almacena el alimento animal, y que se encuentra normalmente sellada a fin de excluir la entrada de aire y promover así la fermentación del forraje verde sin deterioro.

Estructura subterránea reforzada contra los ataques y diseñada para el almacenaje y lanzamiento de misiles.

A class of compounds whose molecular structure consists of chains or networks of alternating oxygen and silicon atoms. Polymerized siloxanes include the class of silicones.

All sediment particles, regardless of mineral origin, that fall within a specified size range between those of sand and clay. An unconsolidated aggregation of particles is also called silt; a consolidated aggregate, silt-stone.

Légamo endurecido con la textura y la composición del esquisto, pero sin su fina laminación o fisibilidad. Es una piedra de légamo masiva en la cual predomina el cieno sobre la arcilla.

Úsese para retratos cortados en papel y montados sobre un fondo contrastante; también, por extensión, imágenes que no muestran detalles interiores colocados sobre un fondo contrastante.

In the geologic time scale, the third period of the Paleozoic Era. It began 443.4 million years ago and ended 419.2 million years ago, following the Ordovician Period and preceding the Devonian Period. It is characterized by a rise in sea levels and a proliferation of fish species. Vascular plants colonized coastal lowlands but continental interiors were mostly devoid of life.

Miembros de una orden de cerca de 2.900 especies agrupadas en cerca de 35 familias de peces óseos, que se caracterizan por ciertos rasgos distintivos de la calavera y la vejiga natatoria. Las especies varían mucho en tamaño y comportamiento, pero la mayoría de las especies tienen barbillas prominentes. A veces se clasifican en el mismo orden que carácidos, la carpa y peces pequeños, su taxonomía está actualmente en proceso de cambio como más investigación en las relaciones moleculares se lleva a cabo.

Wood of Abies alba, an ornamental and timber species tree native to the mountainous regions of central and southern Europe and Asia, much used in carpentry.

Gold applied over a silver object using the fire-gilding method or by electrolysis.

A dark brown or black powder prepared by combining an aqueous solution of silver nitrate and an alkali hydroxide. It is used in silver-oxide batteries, as a laboratory reagent, and as a carbon dioxide scrubber. Salt-free silver oxide showed promise as a bronze disease treatment used at excavation sites but its application has proven a complex and labor consuming method with aesthetically unappealing results.

Paint containing metallic silver as the primary pigment component, for use in art, for covering a surface, or for conductive purposes.

The process of coating an object with a thin adherent layer of silver.

A silver ore, also known as argentite, acanthite, and silver glance, used in niello work and as a colorant in ceramic glazes.

Technique using a silver wire or rod to draw on a prepared surface, usually paper or parchment; when a silver mark is made on the ground, the metal particles tarnish to form a black mark of silver sulfide.

Drawings made by using an implement comprising thin, sharpened rods of silver, usually in a holder, on a support of paper, parchment, or wood treated with a prepared wash or gesso. Ivory may also be used as a support. The silver lines oxidize quickly, making the drawing more distinct, but still delicate and fine.

Personas que supervisan el desarrollo, cuidado y manejo de bosques o parques de bosques.

Cultivo y estudio de árboles madereros, especialmente aquellos criados para madera. Para el cultivo y cuidado de árboles y arbustos en jardines o para propósitos ornamentales, use "arboricultura".

Foresters specializing in silviculture, which is the cultivation and study of forest trees, especially those raised for timber.