Tropical medicinal plant spices have remained underutilized in commercial food processing because of the inadequate chemical characterization of their terpene compositions. The activity of medicinal plants used in fla...Tropical medicinal plant spices have remained underutilized in commercial food processing because of the inadequate chemical characterization of their terpene compositions. The activity of medicinal plants used in flavoring is due to their terpene contents. Terpene contents of Aframomum danielli seeds, Xylopia aethiopica fruits, Syzygium aromaticum leaves, Piper guineense seeds, and Monodora myristica seeds were determined using headspace solid-phase microextraction combined with gas chromatography-mass spectrometry. P. guineense is rich in terpinene and terpinolene (2.5 g per 100 g), S. aromaticum has caryophyllene (0.68 g per 100 g);A. danielli is rich in ocimene (1.65 g per 100 g);X. aethiopica is rich in ocimene (2.94 g per 100 g);M. mystristica is rich in delta carene (0.49 g per 100 g). Combinations of the five medicinal plant spices are being applied as flavorings in packaged tropical food.展开更多
先将3-蒈烯分子中的碳碳双键氧化开环制得蒈酮酸,再将羰基还原成亚甲基得到蒈酸,酰氯化后与系列酰肼发生 N -酰化反应合成了14个新型蒈酸基双酰肼化合物( 5a^5n ),其结构经UV-Vis、 1 H NMR、 13 C NMR、 FT-IR和MS(ESI)表征,并测试了...先将3-蒈烯分子中的碳碳双键氧化开环制得蒈酮酸,再将羰基还原成亚甲基得到蒈酸,酰氯化后与系列酰肼发生 N -酰化反应合成了14个新型蒈酸基双酰肼化合物( 5a^5n ),其结构经UV-Vis、 1 H NMR、 13 C NMR、 FT-IR和MS(ESI)表征,并测试了目标化合物的抑菌和除草活性。结果显示:在用药量为50 μg·mL -1 时,目标化合物对花生褐斑病菌、小麦赤霉病菌、黄瓜枯萎病菌、苹果轮纹病菌、番茄早疫病菌、玉米小斑病菌、西瓜炭疽病菌以及水稻纹枯病菌等8种植物病原菌具有一定的抑制活性,其中化合物蒈酸基α-噻吩甲酰肼 5f (R=α-thiophene)对苹果轮纹病菌的抑制率达85.0%,优于阳性对照百菌清。在用药量为100 μg·mL -1 时,化合物蒈酸基3′,4′-二甲氧基苯甲酰肼 5j (R=3′,4′-OMe-Ph)、蒈酸基 m -甲氧基苯甲酰肼 5d (R= m -OMe-Ph)、蒈酸基 m -甲基苯甲酰肼 5b (R= m -Me-Ph)和蒈酸基苯甲酰肼 5a (R=Ph)对油菜胚根生长的抑制率分别为88.5%、 86.1%、 85.1%和82.6%(均为A级活性水平),优于阳性对照丙炔氟草胺。展开更多
文摘Tropical medicinal plant spices have remained underutilized in commercial food processing because of the inadequate chemical characterization of their terpene compositions. The activity of medicinal plants used in flavoring is due to their terpene contents. Terpene contents of Aframomum danielli seeds, Xylopia aethiopica fruits, Syzygium aromaticum leaves, Piper guineense seeds, and Monodora myristica seeds were determined using headspace solid-phase microextraction combined with gas chromatography-mass spectrometry. P. guineense is rich in terpinene and terpinolene (2.5 g per 100 g), S. aromaticum has caryophyllene (0.68 g per 100 g);A. danielli is rich in ocimene (1.65 g per 100 g);X. aethiopica is rich in ocimene (2.94 g per 100 g);M. mystristica is rich in delta carene (0.49 g per 100 g). Combinations of the five medicinal plant spices are being applied as flavorings in packaged tropical food.
