Just two or three carbon atoms, a hydroxyl group, and some hydrogens.

只有两个或三个碳原子、一个羟基以及一些氢原子。

After serotonin is pumped into the synapse, it is either taken up into the pre-synaptic neuron for later use or it is metabolized by an enzyme into 5-hydroxyindole acetic acid (5-HIAA).

5-羟色胺被“泵”入神经突触后，要么被带到前突触神经元备用，要么被某谢成 5-羟基吲哚乙酸（5-HIAA）。

Their most pronounced feature, however, is not their flavour but their effect on the mouth: they contain a chemical called hydroxy-alpha-sanshool, which induces a tingling numbness in the lips and tongue, a bit like being subjected to a long but mild electric shock.

然而，它们最显著的特征不是味道，而是对口腔的作用：花椒含有一名为羟基-α-山椒素的化学物质，会让嘴唇和舌头感到刺痛麻木，有点像受到持续但温和的电击。

All of this from body parts that are about 70% mineral, made of an inorganic material called hydroxyapatite that is stiff when compressed, combined with flexible protein called collagen to keep you from shattering.

所有这些身体部位大约 70% 是矿物质，由一叫做羟基磷灰石的无机材料制成，这材料在压缩时是坚硬的，与一叫做胶原蛋白的柔蛋白质结合在一起，可以防止你粉碎。

The parathyroid hormone gets the bones to release calcium, and gets the kidneys to reabsorb more calcium so it's not lost in the urine as well as synthesize calcitriol also known as 1,25-dihydroxycholecalciferol also known as active vitamin D.

甲状旁腺激素作用于骨骼使其释放钙离子，也作用于肾脏而增加钙的重吸收，这样钙就不会随尿液排出；以及用于合成骨化三醇，也称为1，25-二羟基胆钙化固醇，又叫活生素D。

After that happens, the liver turns the fatty acids into ketone bodies, like acetoacetic acid and beta hydroxybutyric acid; acetoacetic acid is a ketoacid because it has a ketone group and a carboxylic acid group.

此后，肝把脂肪酸转化成酮体，比如乙酰乙酸、β-羟基丁酸；乙酰乙酸是一酮酸，因为它有酮基团和羧酸基团。

Vitamin D is absorbed into our bloodstream and converted to the active form (a secosteroidal hormone) and a storage form (25-hydroxyvitamin D) – it functions more like a hormone than a vitamin.

生素 D 被血液吸收，并转化为活形式（一开环甾体激素）和储存形式（25-羟基生素 D）——其功能更像是一激素而不是生素。

The researchers said, " Just like we see different colors from different materials, the infrared spectrometer can see many (infrared) colors to better determine the composition, including the water and hydroxyl."

研究人员说，就像我们看到不同材料有不同的颜色一样，红外光谱仪可以看到许多(红外)颜色，可以更好地确定其成分，包括水和羟基。

Carboxylic acids are a type of organic compound characterized by a carbon (C) atom doubly bonded to an oxygen (O) atom and singly bonded to a hydroxyl group (-OH) .

羧酸是一有机化合物，其特征是一个碳（C）原子与一个氧（O）原子双键结合，并与一个羟基（-OH）单键结合。

Monosaccharides link together through glycosidic bonding, which is when an " OH" from the carbon on one monosaccharide bonds with an " H" from the carbon of another monosaccharide.

单糖之间通过糖苷键连接，即一个单糖分子碳原子上的羟基与另一个单糖分子碳原子上的氢原子缩合。

Their experiments show that methanol, commonly known as wood alcohol, and hydroxyl react rapidly at –210 degrees Celsius to form methoxy, which has also been spotted in space.

他们的实验显示，甲醇（俗名木精）和羟基形成甲氧基的反应速度在零下 210 摄氏度时很快，而研究人员也在宇宙中发现了这一过程。

Scientists would need to treat rock and soil with heat to extract water molecules and hydroxyl from them and turn it into liquid water, he said.

他说，科学家需要用热处理岩石和土壤，从中提取水分子和羟基，并将其转化为液态水。

They found that it binds to chromatin, the compact structure that allows long molecules of DNA to ball up and fit into a tiny cell.

研究人员认为，Dsup作为一染色质绝缘体，可以保护DNA免受羟基自由基的攻击。

When the risk of blood clots is high, therapy usually involves lowering the platelet count by using medications like hydroxyurea, interferon-alpha, and anagrelide.

当血栓形成风险较高时，治疗通常包括用羟基脲、α干扰素和阿那格雷等药物来降低血小板计数。

Meanwhile, the British medical journal The Lancet retracted a sharply negative study on using hydroxychloroquine to fight the coronavirus.

与此同时，英国医学杂志《柳叶刀》收回了一项使用羟基氯喹对抗冠状病毒的严重负面研究。

There have been some preliminary studies that show that there could be possible linkage between parabens and cancer.

有一些初步研究表明对羟基苯甲酸酯和癌症之间可能存在联系。

After testing positive, he called antimalarial hydroxychloroquine a cure and, just this week, disparaged vaccines with lies.

在检测呈阳后，他称抗疟药羟基氯喹是一治愈方法，就在本周，他还用谎言贬低疫苗。

They claim that this bottle is paraben free.

他们说这瓶不含对羟基苯甲酸酯。

Within bones, calcius is found primarily as hydroxy appetite, and is bound the collagen within bones.

在骨骼中，钙质主要作为羟基的食欲，并与骨骼中的胶原蛋白结合。

The incorporation of Ascorbic acid with the enzyme, adds hydroxyl group on proline residue in collagen.

抗坏血酸与的结合，使胶原中的脯氨酸残基上增加了羟基。