The scientists built their machine , injected it into yeast cells and then exposed the cells to different concentrations of theophylline , which treats certain respiratory diseases , and tetracycline , an antibiotic .
" Fat-burning " supplements often contain diuretics , which can lead to dehydration ; caffeine and alcohol also increase water loss . Some antibiotics or antidepressants , including tetracycline and the herb saint john 's wort , can make your skin more sensitive to sunlight even if you 're wearing sunscreen .
Because tetracycline 's secreted by a soil bacterium , streptomyces .
因为四环素是由土壤中的一种细菌链霉菌分泌而成。
It contains a solid dose of fluoride and works better than the antibiotic tetracycline .
它包含了一定的氟化物而且效果优于抗生素四环素。
Those frustrating days of tetracycline and gritty soaps left my face not clean and glowing but red and raw .
在那些恼人的日子里,四环素和磨砂肥皂不仅没有让我的面部光洁,反而使它又红又粗糙。
Numerous bacterial infections such as stomach ulcers caused by helicobacter pylori are treated with a class of drug known as tetracycline antibiotics .