Observation on the epidermis of leaves by scanning electron microscope and the determination of contents of aloin in three species of Aloe Effects of different nitrogen levels on seedling growth,nitrate and its secondary metabolites content in Aloe vera seeding Anatomy, Histochemistry and Phytochemistry of Leaves inAloe vera var. chinensis Determination of aloin in BIANBISHU CAPSULES* by HPLC Preliminarily Study on Aloina Kindb.and Pterygoneurum Jur.(Pottiaceae,Bryophyta) in Hebei Province,China Determination of Aloin in Aloes by HPLC Relationship Between Antibacterial Activity of Aloe and Its Anthaquinone Compounds Anatomy, Histochemistry and Phytochemistry of Aloe arborescens Leaves According to Leaf-age Development of Vascular Bundles in Aloe arborescens Leaves Effects of Shading on Cellular Ultrastructure and Aloin Content of Aloe vera L. A comparative study on the content of barbaloin and structure of leaves in 9 species of Aloe L. Structural analysis and aloin determination in leaves of Aloe arborescens at different