Nitrogen is required by plants for the synthesis of proteins, which are needed as enzymes and as structural components of cells.

氮是植物合成蛋白质所需要的，蛋白质又是酶和细胞结构的组成成分。

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Fluorescent staining method is a sensitive cytochemical staining method, it can reflect minimal changes of biochemical components of cells.

荧光染色法是一种敏感的细胞化学染色法，它可以反映出细胞生物化学成分的微小变化。

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His own work involves such things as understanding the makeup and behavior of less-understood critical components of cells, like lipids and glycols, and how a cancer cell might bind with a nanoparticle.

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Bacterial proteins, too, can be identified and analysed in infected tissue by combining new techniques for the production of antibodies with the expanding science of immunocytochemistry (which looks at the reactions to those antibodies of individual components of cells).

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However, closer examination revealed differences between men and women in two key components of the immune system - T-cells, which protect the body from infection, and B-cells, which secrete antibodies.

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