Frozen semen

Japanese: 凍結精液 - とうけつせいえき(英語表記)frozen semen
Frozen semen
Semen diluted with a preservation solution and frozen in liquid nitrogen (-196°C). Used for artificial insemination of livestock. When livestock sperm is diluted with a preservation solution mainly made of egg yolk, sodium citrate, and glucose and stored at around 5°C, it can only retain its fertilizing ability for 4 to 5 days. However, in 1952, C. Polge and his colleagues in the UK succeeded in freezing semen on dry ice (-79°C) using a preservation solution containing glycerin as a cryoprotectant (7% of the total volume of diluted semen), and this was followed by a shift to cryopreservation.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
保存液で希釈した精液を,液体窒素(-196℃)で凍結したもの。家畜の人工授精に用いる。家畜精子を,卵黄,クエン酸ナトリウム,ブドウ糖を主体にした保存液で希釈して5℃前後で保存した場合は,4~5日しか受精能力を保持できなかった。しかし,1952年にイギリスのポルジC.Polgeらが抗凍結剤としてグリセリンを添加(希釈精液総量の7%)した保存液を用いてドライアイス(-79℃)での凍結に成功してからは,凍結保存に切り替わった。

出典 株式会社平凡社世界大百科事典 第2版について 情報

<<:  Freeze grinding

>>:  Freezing method

Recommend

Pontos Euxeinos (English spelling)

...Most of the coastal areas are blessed with a m...

The Australopithecus Problem

… [Systematic relationship] Discussions about the...

Household equality system (English: hù děng zhì)

A system in China that ranks households according ...

Parliamentary government

A political system in which a parliament based on ...

"Applet Report" - Applet Report

...However, there are criticisms that such state-...

Aleksey Alekseevich Brusilov

A general in Imperial Russia and an advisor to th...

Long live Senshu

〘Noun〙 A New Year's celebration art form roote...

Izakuso - Izakunosho

A manor from the Kamakura and Nanboku-cho periods...

Suaeda

...An annual plant of the Chenopodiaceae family t...

Wakayanagi [town] - Wakayanagi

An old town in Kurihara County in northern Miyagi ...

Gamou [town] - Kamou

A former town in Aira County, central Kagoshima Pr...

Contour cultivation - Contour cultivation

A method of growing crops on sloping land. It is ...

Setoff; Aufrechnung

When a debtor has a claim against his/her creditor...

Kanazawa Shigetake

...This tradition has been passed down from gener...