Capillary (disambiguation)

A capillary is a very fine, elongated cavity. The word derives from the Latin word capillus ( the hair ) from.

Technology

Generally, all capillary tubes with a very small inner diameters. Due to the strong coming into the foreground compared to larger pipes surface effects occurs in capillaries of the capillary, a physical effect. Liquids with high surface tension to rise to in capillaries; they condense on the walls of capillaries also above its boiling point and can cause chemical reactions that would not run outside of capillaries so. The capillarity caused, for example ice lenses.

Biology / Medicine

Capillaries are the smallest blood vessels. They are about 0.5 mm long and have a diameter of 5 to 10 microns. They form a fine network in the organs and tissues of the body and allow the exchange of substances between blood and tissue. The diameter of the pulmonary capillaries is just large enough so that red blood cells pass through them one after the other.

Biology / Plants

Tracheae and tracheids in softwood tracheids only, make the water control system of trees and other plants. They run the ground water with the dissolved nutrient salts by means of capillarity and the osmotic pressure to the leaf organs of plants.

Farmland / agriculture

In a soil is the size and distribution of voids ( pores). For water and air balance is crucial for the fertility of a site The small and smallest pores called capillaries - in them the rainwater remains thanks to the adsorption forces as adhesive water obtained at the longest - in them increases moisture from the groundwater ( capillary rise height ).

Chemistry

In chemical laboratories, the boiling capillaries are meant by the term capillary mostly. They are used in both vacuum and distillation under normal pressure in order to avoid bumping. These are very thin, flexible capillaries. Delve into the liquid to be distilled, and should touch the bottom of the flask. Due to the capillary occur constantly a very small bubbles of inert gas or air in the fluid that maintain a consistent boiling and so prevent boiling.

Analysis

In the analysis, such as thin layer chromatography, glass capillaries, and capillary smallest volumes are in certain methods, called, for sample size and contracting for used. The absorption of the sample is carried out using a Pipettierhelfers or mostly independently by capillary action. Capillary pipettes are usually calibrated "In " ( Eingussvolumen ).

Inkjet Printer

In ink jet printers capillaries are used to transport the ink to the printhead. The benefits are enormous: The devices can compact (less high) can be built because the ink tanks can not be moved with the head, as both are connected by capillaries. The print heads can be positioned finer and faster because there is less due to the lower moving mass inertia - which leads to significant quality improvements, especially in the fast pressure ( design pressure). Amazingly, capillaries were first used by refill providers ( for Epson printers especially ) to offer larger ink tanks than those offered by printer manufacturers to be able to. This ink tanks must be installed outside of the unit and are connected through the capillaries with the print head.

Textile industry

In the textile industry is the name for the finest capillaries ( individual ) fibers, which are then spun into a yarn.

The capillary thread is exiting the nozzle spinning out of the hole of the spinneret Einzelfilamentfaden.

Other applications

• Wick
• Blotting paper
• The inner lining of heat pipes
• Fiber structure of plants for liquid transport
• Gas chromatography
• Paper chromatography
• Solder