Difference between revisions of "Template: Featured article 03 22" - New World Encyclopedia

Revision as of 00:15, 16 February 2020

Featured Article: Aerogel

A 2.5 kg brick is supported by a piece of aerogel weighing only two grams

An aerogel is a low-density solid-state material derived from a gel in which the liquid component of the gel has been replaced with gas. The result is an extremely low-density, highly porous solid with several remarkable properties, most notably its effectiveness as an insulator. It is nicknamed frozen smoke due to its semi-transparent nature and the way light scatters in the material. It feels like expanded polystyrene (Styrofoam) to the touch.

@@ Line 1: / Line 1: @@
 {{Main page article box|
 type=Featured|
-title=Immune system|
+title=Aerogel|
-image_name=Antibody.png|
+image_name=Aerogelbrick.jpg|
-image_desc=Schematic of antibody binding to an antigen|
+image_desc=A 2.5 kg [[brick]] is supported by a piece of aerogel weighing only two grams|
-text=The '''[[immune system]]''' is the system of specialized [[cell (biology)|cell]]s and [[organ (anatomy)|organs]] that protects an organism from outside [[biology|biological]] influences (though in a broad sense, almost every organ has a protective function&mdash;for example, the tight seal of the [[skin]] or the acidic environment of the [[stomach]]).
+text=An '''aerogel''' is a low-density [[solid|solid-state]] material derived from a [[gel]] in which the liquid component of the gel has been replaced with gas. The result is an extremely low-density, highly porous solid with several remarkable properties, most notably its effectiveness as an insulator. It is nicknamed '''frozen smoke''' due to its semi-transparent nature and the way light scatters in the material. It feels like [[Polystyrene#Solid foam|expanded polystyrene]] ([[Styrofoam]]) to the touch.
+}}
-When the immune system is functioning properly, it protects the body against [[bacteria]] and [[virus|viral]] infections and destroys [[cancer]] cells and foreign substances. If the immune system weakens, its ability to defend the body also weakens, allowing pathogens (infectious agents), including viruses that cause [[common cold]]s and flu, to survive and flourish in the body. Because the immune system also performs surveillance of tumor cells, immune suppression has been reported to increase the risk of certain types of cancer.}}