Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Rainer B Volk"'
Publikováno v:
Natural product communications. 11(8)
Officinal European Leonurus cardiaca, East Asian L. japonicus, and South African Leonotis leonurus are traditionally used for cardiovascular, gynecological, and neurological disorders. Nevertheless, a phytochemical assessment as a basis for their qua
Autor:
Rainer-B. Volk
Publikováno v:
Zeitschrift für Phytotherapie. 32:202-208
Autor:
Rainer-B. Volk
Publikováno v:
Microbiological Research. 163(3):307-313
Summary A screening of microalgae strains is described, with the objective to discover more species besides the known cyanobacterium Nodularia harveyana which excrete the manifold biologically active and co-mutagenic indole alkaloid norharmane (9H-py
Autor:
Rainer-B. Volk
Publikováno v:
Microbiological Research. 163(2):161-167
Summary This paper reports about a newly developed assay which enables the user to quantify and compare the antimicrobial (anticyanobacterial) activity of both hydrophilic and lipophilic test compounds without any restriction. The assay is characteri
Publikováno v:
Journal of Natural Medicines. 61:397-401
A high molecular weight arabinogalactan protein (AGP) from the pressed juice of Echinacea purpurea, known to exhibit immunomodulatory properties in vitro, was characterized. Alkaline hydrolysis was carried out, leading to degradation of the protein c
Autor:
Rainer-B. Volk
Publikováno v:
Journal of Applied Phycology. 19:491-495
Changes in the content of exometabolites excreted by the cyanobacterium Nostoc insulare during batch cultivation were determined. During linear growth, only the non-toxic compound N,N′-(4,5-dimethyl-1,2-phenylene)-bis-acetamide was detectable in ap
Publikováno v:
Planta Medica. 72:1424-1427
During batch cultivation, the cyanobacterial strain Synechocystis aquatilis Sauvageau B90.79 was found to release a fucose-rich sulfated polysaccharide, which was mainly composed of arabinose (45%) and fucose (47%) and had a degree of sulfation of 0.
Autor:
Rainer-B. Volk, Sabine Mundt
Publikováno v:
Journal of Applied Phycology. 19:55-62
The isolation, identification and quantification of exometabolites from culture media of the cyanobacterium Nostoc insulare are described. Besides the known exometabolite 4,4′-dihydroxybiphenyl (I), two more compounds, the β-carboline 9H-pyrido(3,
Autor:
Rainer-B. Volk
Publikováno v:
Journal of Applied Phycology. 18:145-151
The isolation of norharmalane (3,4-dihydro-9H-pyrido(3,4-b)indole) from culture media of the cyanobacterium Nodularia harveyana is described. The minimum toxic quantities against selected cyanobacteria of this compound, of the two known cyanobacteria
Autor:
Rainer-B. Volk
Publikováno v:
Journal of Applied Phycology. 17:339-347
Culture medium extracts obtained from 115 culture media of 35 different microalgae species were screened for the presence of algicidal compounds, in particular for compounds which are cytotoxic to Arthrospira (Spirulina) laxissima. In agar plate diff