A New Antifungal Flavonol Glycoside from Hypericum perforatum Studies on the choice of conditions for the extraction of hypericin from Hypericum perforatum Quantitative determination of hyperforin in Hypericum perforatum by HPLC Antibacterial Effect of the Total Extract of Hypericum perforatum on Staphylococcus aureus Studies on Tissue Culture and Plantlet Regeneration of Common St. John‘swort (Hypericum perforatum) Variation of Bioactive Compounds in Hypericum perforatum Growing in Turkey During Its Phenological Cycle Pseudohypericin and Hyperforin in Hypericum perforatum from Northern Turkey: Variation among Populations, Plant Parts and Phenological Stages Purification of total flavonoid glycosides from Hypericum perforatum by macroporous adsorption resin with on-line detection system Determination of flavonoids in Hypericum perforatum processed by different methods of drying by HPLC Effects of light, gibberellin and ethephon on germination of seed of Hypericum perforatum Evaluation of preparing process of extract of Hypericum perforatum using HPLC fingerprint analysis Study on correlation between nodule density of different organs and hypericin content in Hypericum perforatum Inhibition of Hypericum perf oratum extract on influenza A virus Experimental study of the total flavonoid in Hypericum perforatum on depression Advances in studies on act ive constituents of Hypericum perforatum Studies on chemical constituents of Hypericum perforatum Ultrastructure of the Multicellular Nodules in Hyperic um perforatum Leaves Preliminary study on cultivation of adventitious roots of Hypericum perforatum in bioreactors Synthesis and Accumulation of Hypericin in Hypericum perforatum L. Floral biology and breeding system of Hypericum perforatum Studies on the development of secretory structures and their secretory products accumulation of Hypericum perforatum Chemical Constituents of Volatile Essential Oil in Hypericum perforatum Antibacterial Effect of the Total Extract of Hypericum perforatum L. on Corynebacterium glutamicum and Alcaligenes faecalis Induction of Callus of Hypericum perforatum L. and Qualitative Identification of Active Constituents of its Callus Determining the Quantity of Hypericin in Medicinal Materials and Asepsis Seedings of Hypericum perforatum by HPLC Effect of Factors on Callus Biomass and Synthetic Mass of Hypericin in Hypericum perforatum Changes in physiological and biochemical characteristics, contents of bioactive compounds, and antioxidant capacity of Hypericum perforatum during introduction and acclimatization