外果皮由一层表皮细胞构成。
宁国山核桃的外果皮色素是一类有较好应用前景的食用色素。
Thus the pigment of walnut outer peel has a good prospect as an edible pigment.
聚合果长椭球形，长达13厘米，直径约9厘米，外果皮有苍白色皮孔。
Aggregate long ellipsoid, 13 cm long, 9 cm in diameter; pericarp with glaucous lenticels.
以水为萃取剂，提取不同方法干燥的核桃外果皮中棕褐色色素，并对其稳定性进行了测试。
Use water to distill the Dark Brown Pigment in the differently dried walnut epicarp. We have tested the stability of the dark brown pigment.
以水为萃取剂，提取不同方法干燥的核桃外果皮中棕褐色色素，并对其稳定性进行了测试。
Use water to distill the Dark Brown Pigment in the differently dried walnut epicarp. We have tested the stability of the dark brown pigment.
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