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A swan neck flask, also known as a gooseneck flask, is a flask with a particular shape of tube leading into it. A test tube or other vessel may also have a "swan neck". The swan neck significantly slows down the motion of air through the tube, and particles in the air, such as bacteria, become trapped on moisture on its inner surfaces. As a result, sterile liquid in the vessel itself remains sterile as long as the liquid does not contact the contaminated liquid in the tube. Louis Pasteur developed and used this apparatus in 1859 to prove that particles in the air (germ theory), rather than the air itself (spontaneous generation), led to fermentation.

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  • Matràs de coll de cigne (ca)
  • Swan neck flask (en)
  • 鹅颈瓶 (zh)
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  • El matràs de coll de cigne és un aparell inventat per Louis Pasteur al segle xix. Pasteur que volia demostrar amb aquell invent que els brous, sopes, purés… es podrien per culpa dels microorganismes que hi queien, així que va idear el matràs de coll de cigne perquè el seu mecanisme impedia que els microorganismes poguessin entrar dins i generessin la putrefacció. Pasteur va posar damunt d'una taula dos matrassos, tots dos amb el mateix brou, però un dels matrassos es va trencar, fet que va facilitar l'aparició de microorganismes. Al cap d'unes hores va veure que el contingut del matràs trencat estava podrit i el del matràs no trencat encara no; el matràs no trencat es podriria igual, però tardaria molt més a fer-ho. (ca)
  • A swan neck flask, also known as a gooseneck flask, is a flask with a particular shape of tube leading into it. A test tube or other vessel may also have a "swan neck". The swan neck significantly slows down the motion of air through the tube, and particles in the air, such as bacteria, become trapped on moisture on its inner surfaces. As a result, sterile liquid in the vessel itself remains sterile as long as the liquid does not contact the contaminated liquid in the tube. Louis Pasteur developed and used this apparatus in 1859 to prove that particles in the air (germ theory), rather than the air itself (spontaneous generation), led to fermentation. (en)
  • 鹅颈瓶是一种由特殊形状的管道引向烧瓶的实验设备。“鹅颈”会降低空气在管中流动的速度,空气中的粒子,比如细菌,会困在其潮湿的内表面上。将瓶中液体煮沸,杀死瓶中微生物后,只要不接触管道中的污染液体,容器中的灭菌液体就会保持无菌。如果将曲颈管打断,管外空气直接进入瓶中,肉汤不久便会出现微生物。路易·巴斯德在1860年代早期,创造并且使用了这种容器来证明是空气中的粒子(细菌论),而非空气本身(自然发生说),导致发酵。 (zh)
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  • El matràs de coll de cigne és un aparell inventat per Louis Pasteur al segle xix. Pasteur que volia demostrar amb aquell invent que els brous, sopes, purés… es podrien per culpa dels microorganismes que hi queien, així que va idear el matràs de coll de cigne perquè el seu mecanisme impedia que els microorganismes poguessin entrar dins i generessin la putrefacció. Pasteur va posar damunt d'una taula dos matrassos, tots dos amb el mateix brou, però un dels matrassos es va trencar, fet que va facilitar l'aparició de microorganismes. Al cap d'unes hores va veure que el contingut del matràs trencat estava podrit i el del matràs no trencat encara no; el matràs no trencat es podriria igual, però tardaria molt més a fer-ho. (ca)
  • A swan neck flask, also known as a gooseneck flask, is a flask with a particular shape of tube leading into it. A test tube or other vessel may also have a "swan neck". The swan neck significantly slows down the motion of air through the tube, and particles in the air, such as bacteria, become trapped on moisture on its inner surfaces. As a result, sterile liquid in the vessel itself remains sterile as long as the liquid does not contact the contaminated liquid in the tube. Louis Pasteur developed and used this apparatus in 1859 to prove that particles in the air (germ theory), rather than the air itself (spontaneous generation), led to fermentation. (en)
  • 鹅颈瓶是一种由特殊形状的管道引向烧瓶的实验设备。“鹅颈”会降低空气在管中流动的速度,空气中的粒子,比如细菌,会困在其潮湿的内表面上。将瓶中液体煮沸,杀死瓶中微生物后,只要不接触管道中的污染液体,容器中的灭菌液体就会保持无菌。如果将曲颈管打断,管外空气直接进入瓶中,肉汤不久便会出现微生物。路易·巴斯德在1860年代早期,创造并且使用了这种容器来证明是空气中的粒子(细菌论),而非空气本身(自然发生说),导致发酵。 (zh)
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