Results 181 to 190 of about 8,749 (218)

Synthesis and Properties of Hypericins Substituted with Acidic and Basic Residues: Hypericin Tetrasulfonic Acid – A Water Soluble Hypericin Derivative

Monatshefte für Chemie / Chemical Monthly, 1998
Sulfonation of hypericin leads to its di-, tri-, and tetrasulfonic acid derivatives. The latter is soluble in water up to millimolar solutions. Homoaggregate formation (J-aggregates) was observed only above 5ċ10−4 mol/l. In water solutions, the tetrasulfonic acid hypericin derivative was found to be present as its bay-phenolate with most of the ...
Heinz Falk, Abd-El-Wareth A. O. Sarhan, Huyen T. N. Tran, Robert Altmann   +3 more
openaire   +1 more source

Effect of Acetazolamide on Hypericin Photocytotoxicity

Planta Medica, 2002
The photodynamic action of hypericin (HYP) in vitro was evaluated using human leukemic HL-60 and lung carcinoma A549 cell lines. After illumination HYP (1 x 10 (-5) M) reduced the proliferation and/or survival of HL-60 and A549 cells vs. controls to almost to 0 % and 29 %, respectively.
Peter, Solár, Ivan, Cavarga, Jirina, Hofmanová, Mária, Cekanová-Figurová, Pavol, Miskovský, Peter, Brezáni, Gabriela, Hrcková, Alois, Kozubík, Peter, Fedorocko   +8 more
openaire   +2 more sources

Hypericin

Neurosurgery, 1994
William T. Couldwell, Rayudu Gopalakrishna, David R. Hinton, Shikun He, Martin H. Weiss, Michael L.J. Apuzzo   +5 more
openaire   +2 more sources

Molecular Response to Hypericin-Induced Photodamage

Current Medicinal Chemistry, 2012
Hypericin (Hyp) is used as a powerful natural photosensitizer in photodynamic therapy (PDT). After selective accumulation in tumor tissue, vessels and matrix, and activated by visible light, it destroys the tumor mainly via generation of reactive oxygen species. After photoactivation, molecular biological mechanisms lead to different cellular endpoints:
B, Krammer, T, Verwanger
openaire   +2 more sources

Hypericin

2008
Constance L. L. Saw, Paul W. S. Heng
openaire   +2 more sources

Hypericin and pseudohypericin

2021
Koula Doukani, Ammar Sidi Mohammed Selles, Hasna Bouhenni   +2 more
openaire   +1 more source

Inhibitory Activity and Mechanism Investigation of Hypericin as a Novel α-Glucosidase Inhibitor

Molecules, 2021
Qi Dong
exaly  

Umwandlung von Penicilliopsin in Proto‐hypericin und Hypericin

Angewandte Chemie, 1955
H. Brockmann, H. Eggers
openaire   +1 more source

hypericin, n.

2023
openaire   +1 more source

Hypericin

2012
openaire   +2 more sources