An inoculation loop (sometimes called a smear loop, inoculation wand or microstreaker) is a simple tool used mainly by microbiologists to retrieve an inoculum from a culture of microorganisms. Its tip is a wire made of platinum or nichrome, the latter being inferior but less expensive. The wire forms a small loop with a diameter of about 5 mm. This loop is handy for taking an inoculum from a liquid by using the phenomenon of surface tension.

The inoculation loop is always sterilized in a flame until it becomes red hot before and after each use. By doing this, the same tool can be reused in different experiments without fear of cross-contamination.The loop is used to cultivate microbes in Agar jelly and to use the streak manouvre to transfer microbes.
http://en.wikipedia.org/wiki/Inoculation_loop

http://www.slic2.wsu.edu:82/hurlbert/micro101/pages/101lab3....



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Note added at 9 mins (2008-07-14 13:39:21 GMT)
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FYI - Die Öse ist ein in der Mikrobilologie eingestetztes Instrument, das zum Transfer von Baktiern-Kulturen verwendet wird. Es besteht aus einem Stiel mit einer Schlaufe vorne drauf
Hier kannst Du eine Abbildung sehen
http://www.chemikalienlexikon.de/preise/labor/001a-lab.htm