lactic

まもなく, 関東地方も梅雨明けを迎えます。そんな暑さの本番を控え, 「汗」との上手なつきあい方が紹介されています。

Enhance sweat gland function to reduce odors

In summer, sweat odors become more noticeable. What can be done to avoid that unpleasant sour smell?

Prof. Hiroo Yokozeki at Tokyo Medical and Dental University, an expert in dermatology, said, “Sweat itself has almost no odor.”

Although sweat does contain minute amounts of lactic acid and urea, it mostly comprises water. It smells because old sebum and keratin dissolved by sweat on the skin are broken down by bacteria.

Rieko Yamagishi from Lion Comfortable Lifestyle Laboratories in Tokyo said, “Decomposition odors contain such things as lower fatty acids and ammonia.” These are the cause of that sour smell.

Perspiration is a mechanism to prevent the body’s temperature from getting too high. Sweat is excreted from eccrine sweat glands located all over the body. These glands are particularly concentrated in the palms, chest, feet and forehead. Plasma from blood is pumped into eccrine glands via capillaries and creates sweat.

During the process of sweat exuding onto the outer layer of the skin, nutrients such as salt that are needed by the body are reabsorbed through capillaries. According to Yokozeki, these functions are gradually enhanced as temperatures rise in the lead-up to summer.

以下省略

http://the-japan-news.com/news/article/0003075633

本日気になった表現は “lactic acid” です。

『リーダーズ英和中辞典』(研究社)で調べると, 「[生化]乳酸」とありました。 接頭辞 “lact-” が「乳」や「乳糖」の意を表すと記されています。Merriam-Webster.comに “lactic acid” は “a chemical produced by the body in your muscles during exercise” と定義されていました。

人が乳製品を摂取することで, 腹痛などを引き起こす原因となる “lactose” 「ラクトース」も上記の内容と関連していたことがわかりました。(Cayu)

以前, “lactic” の記事が取り上げられていました。
lactic - 田邉祐司ゼミ 常時英心：言葉の森から