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Multifunctional tetranortriterpenoids from Azadirachta indica a separation challenge solved by MLCCC
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Objective:To evaluate the acaricidal activity of the essential oil obtained from roots of Derrisfloribunda (D.floribunda......
有机食品,是指来自有机农业生产体系,根据国际有机农业生产要求和标准进行生产加工的并通过有机食品独立认证机构认证的所有农副产......
我国在耕地利用方面长期只注重数量的保护，而忽视质量的提高，长期施用化肥、农药等现代农用生产资料。导致耕地质量下降；发展有机农业......
