Until about 1902, legal food preservatives included chemicals like formaldehyde, borax and copper sulfate.
在1902年以前合法的食品添加剂还包括甲醛,硼砂和硫酸铜。
WIL生活启示录
Before the industrial era, salt was the most common and effective food preservative.
在工业时代之前,盐是最常见、最有效的食品防腐剂。
The Practice Season 5
No, nor are there with most food preservatives.
这倒没有,但大多数食品防腐剂也没有。
TED-Ed(视频版)
The spices found there, which were used as seasonings, food preservatives, and aphrodisiacs, were worth many times their weight in gold.
在那里发现的香料被用作调味品、食品防腐剂和壮阳药,其价值是黄金的许多倍。
《卫报》(文章版)
This pattern was set in 1879 when a chemist called Constantin Fahlberg was working with coal tar derivatives at Johns Hopkins University in the hope of discovering a new food preservative.
Their studies helped determine that while compounds like borax, hydrated sodium borate, are effective at cleaning, adding minerals to the soil, repealing pests and manufacturing glass and porcelain, they`re less savory as a food preservative.