Inadequate B12, found only in animal products, or folic acid can yield blood cells unable to carry vital oxygen to the brain.
只存在于动物性食物中的维生素B12缺乏，或叶酸缺乏时，机体合成的红细胞功能异常，无法为脑细胞供应至关重要的氧。
In this article the laser fluorescence spectra and the singlet oxygen relative quantum yield of hematoporphyrin and its derivatives are deter - mined.
本文测定了血卟啉及其衍生物的荧光光谱及单态氧的相对量子产额。
The results indicate that the laser fluorescence intensity and the singlet oxygen quantum yield of hematoporphyrin are better than others and they may be effective photosensitizers.
结果表明，血卟啉的荧光强度和单态氧的量子产额较高，它们均为有效的光敏剂。
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