线二色光谱（LD）是研究色素分子在光合膜上空间取向和排布的重要手段。

Linear dichroism (LD) spectroscopy is an important technique in the study of the orientation and organization of pigments in the photosynthetic membrane complexes in vivo and in vitro .

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面条不含任何防腐剂与化学合成色素，先进的低温生产线极大程度的保留了小麦粉的多种天然营养成分；

The noodles are made by advanced low-temperature production line without any preservative or pigment but maintain lots of nutrition.

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