一碳单位

在人体内叶酸携带一碳单位形成5-甲基四氢叶酸（5-MethyltetrahydrofolicAcid）、亚甲基四氢叶酸等活性形式发挥作用，其中5-甲基四氢叶酸是人体内活性叶酸的主要存在形式。

In man , folic acid carries one carbon unit to form 5-methyltetrahydrofolic acids methylene tetrahydrofolic acid and other active forms , then they become useful . 5-Methyltetrahydrofolic acid is the major folate in man .

EE的化学结构与甘氨酸类似，可选择性地竞争一碳单位合成，干扰了代谢旺盛的细胞组织系统，如性腺、血液、骨髓和神经等。

Physiological materials ( such as glycine etc ) might be selectively competed with EAA and interrupted the synthesis of one carbon unit , because their chemical structure is similar . These responses mainly occurred in the cells , tissues and systems of active metabolism , e.

因为在一碳单位的代谢中发挥着关键的作用，所以叶酸对于DNA合成和甲基化修饰都是至关重要的。

Folate through its role in the one carbon metabolism is crucial for both DNA synthesis as well as methylation .

并且，青春发育前期对一碳单位氨基酸中的Met和His的利用程度较高。

Moreover , the utilization ratio of Met and His ( one unit carbon AA ) were higher during ante - puberty .

其生理作用主要是参与体内一碳单位的代谢。

Physiological functions of homocysteine are participating in the metabolism of one carbon unit .

叶酸主要参与一碳单位的转移，是细胞生长和组织修复必需的物质，对胚胎发育和生长至关重要。

Folic acid mainly functions in various one-carbon transfer reactions , which are crucial for cell growth and tissue repair and essential for fetal growth and development .

不过，紫外线系统必须安装适当的预过滤，一碳单位单独解决的味道和气味问题，将只在有可用的电源。

However , ultraviolet system must install proper beforehand , a carbon filter unit alone to the taste and smell of the problem , will only in usable power supply .

低碳经济作为一种经济形态，主要特征有两个方面：一是碳生产率即单位碳排放所创造的GDP或者附加值比较高；二是社会人文发展水平、生活质量提高。

Low-carbon economy as an economic form , the main feature has two aspects : One is that carbon emissions of carbon productivity unit of GDP or added value created is higher ; Second , Social and human development level and the quality of life improved .

一个绿色项目节省的每一吨碳都可以计为一个碳排放单位（CER）。

Each tonne of carbon saved in a green project counts as a unit of carbon emission reduction ( CER ) .