Beta acid a component of lupulin.

贝塔酸，蛇麻素的成份之一。

youdao

Peudolaric acid a (PAA); S180 cells; Apoptosis of tumor cells.

土槿甲酸；肉瘤180细胞；瘤细胞凋亡。

youdao

Objective:To analyse aristolochic acid A in Asarum petelotii O.

目的：对红金耳环中马兜铃酸A进行定量分析。

youdao

Soil should also be tested for its pH level, a measure of the acid and alkaline balance.

VOA: special.2009.06.09

There are more than 20 amino acids that make up the biological polymers called proteins, so there are 20 choices of each amino acid at a position on a protein.

而那些称为蛋白质的生物活性多聚体,是由二十种不同氨基酸所构成,因此每个蛋白质的,任意位点都有多达二十种氨基酸可供选择

耶鲁公开课 - 生物医学工程探索课程节选

And then linked to the glycerol instead of a third fatty acid chain is a water soluble molecule, like a salt.

但连到甘油上的第三个基团不是脂肪酸链,而是一种水溶性的分子,像盐一样

耶鲁公开课 - 生物医学工程探索课程节选

He searched for years and eventually lighted on a mixture of oleic acid (a fatty acid found in various vegetable oils) and nitrogen-containing compounds called amines.

ECONOMIST: To make engines cleaner, add H2O

But stomach acid is a defense against bacteria, and a big new study found that acid suppression may have a surprising downside: more infections.

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They began by finding a molecule that would carry a novel amino acid to a mammal cell's protein factories.

ECONOMIST: Synthetic biology: Expanded vocabulary | The