Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Helle Weber-Ravn"'
Autor:
Moha Afrokh, Saida Tahrouch, Khadija ELMehrach, Fadma Fahmi, Mohamed Ait Bihi, Helle Weber-Ravn, Abdelhakim Hatimi, Mohamed Tabyaoui
Publikováno v:
Chemical Data Collections. 43:100984
Publikováno v:
Ravn, H W, Mondolot, L, Kelly, MT & Lykke, A M 2015, ' Plantamajoside-A current review. ', Phytochemistry Letters, vol. 12, pp. 42-53 . https://doi.org/10.1016/j.phytol.2015.02.002
Plantamajoside is a bioactive caffeic acid derivative, a dihydroxyphenethyl glucoside in the group of polyphenolic compounds. It is one of the principal caffeic acid glycoside in the Plantago Digitalis, Hemiphragma, Lagotis, Picrorhiza, Rehmannia, Ve
Autor:
Helle Weber Ravn
Publikováno v:
Ravn, H W 2009, ' Two new methods for early detection of the effects of herbicides effects in plants using biomarkers ', Journal of Planar Chromatography-Modern TLC, vol. 22, no. 1, pp. 65-71 . https://doi.org/10.1556/JPC.22.2009.1.12
Summary Two simple and rapid methods for early detection of the effects of herbicides using two different groups of plant biomarkers are presented. The methods are based on High Performance Planar Chromatography (HPPC) and have been developed as fiel
Publikováno v:
Maraldo, K, Ravn, H W, Slotsbo, S & Holmstrup, M 2009, ' Responses to acute and chronic desiccation stress in Enchytraeus (Oligochaeta: Enchytraeidae) ', Journal of Comparative Physiology B: Biochemical, Systems, and Environmental Physiology, vol. 179, no. 2, pp. 113-123 . https://doi.org/10.1007/s00360-008-0305-5
Enchytraeids are small soil living oligochaete worms with high sensitivity to low soil moisture. The effects of acute and chronic desiccation on survival and reproduction were determined in Enchytraeus albidus and Enchytraeus crypticus. Further, effe
Publikováno v:
Aquatic Toxicology. 73:210-220
Microcosm and mesocosm studies evidence that pyrethroid insecticides may have a severe effect on zooplankton populations. The effect may cascade to phytoplankton communities and thus worsen the impact of eutrophication and algal blooms. In natural fr
Publikováno v:
Journal of Chromatography A. 1026:301-304
A new and simplified method for extraction of ergosterol (ergosta-5,7,22-trien-3beta-ol) from fungi in soil and litter was developed using pre-soaking extraction and paraffin oil for recovery. Recoveries of ergosterol were in the range of 94-100% dep
Publikováno v:
Functional Ecology. 15:647-653
Summary 1. Physiological and biochemical responses to desiccation were studied in two species of hygrophilic Collembola, Folsomia fimetaria L. and Protaphorura armata Tullberg. The temporal changes in water content, body fluid osmotic pressure, and a
Publikováno v:
Journal of Applied Phycology. 7:589-594
The optimal conditions were established for extraction of paralytic shellfish toxins from a Danish clone of Alexandrium tamarense using extraction with acetic acid and HCl in the concentration range 0.01–1.0 N. Physical destruction of the cells was
Autor:
Charlotte U. Schmidt, Helle Weber Ravn, Hanne Sten, Per Halfdan Nielsen, Carsten Christophersen, Uffe Anthoni
Publikováno v:
Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology. 111:405-412
Batch cultures of the dinoflagellate Alexandrium ostenfeldii (Paulsen) Balech et Tangen were characterized by an exponential growth phase ending after 10 days. Three different paralytic shellfish poison (PSP) toxin patterns (A, B, and C) occurred at
Publikováno v:
Phytochemistry. 29:3627-3631
The four known phenolic compounds, 3,4-dihydroxyphenethyl alcohol-6- O -caffeoyl-β- d -glucoside, acteoside (verbascoside), plantaginin and plantamajoside, and a new phenylpropanoid glycoside, hellicoside, were isolated from the aerial parts of Plan