| |
Head Office:
Add: 205-207th ,NO.:4299#, Yindu Road, Minhang district ,201108, Shanghai,China
Tel: +86 21 54427746;54831377;54831378
Fax: +86 21 54831376
E-mail: info@sm-nbc.com |
|
| |
|
| |
|
 Products
Geum japoniceum
trade name |
part used |
ingredient |
specification |
tests methd |
avens |
all plant |
gein(eugeniin) |
5% |
HPLC |
Product name :Water Avens extract (Geum rivale extract :Geun urbanum extract) .
Ingredient : triterpenes; flavonoids; tannins; antimicrobial activity .
The antimicrobial activity of extracts of Geum rivale (Rosaceae) and that of some isolated constituents, on bacteria and fungi, was evaluated.
The activity was concentrated in the triterpenes fraction and, for gram+ and gram- bacteria, also in the flavonoids fraction. |
This confirmed subjective visual examination of the population, which suggested that while hybrids remained distinct from G. urbanum, the delimitation of hybrids from G. rivale was difficult and not practical.
Measurements of soil water content and of transmitted photosynthetically active radiation (PAR) indicated that the habitat range of G. urbanum at Malham Tarn was limited to well-drained shady sites, while G. rivale occurred in sites with a very varied degree of shading and soil water content.
Hybrids were most frequent and most variable in the well-drained and heavily shaded 'urbanum-type' habitats.
Hybrids very similar to G. rivale were found in waterlogged sites, but in unshaded sites only G. rivale occurred, with little evidence of hybridization.
The availability of intermediate 'hybrid' habitats was not a major factor in determining the pattern of morphological variation in the hybrid population, and a number of alternative hypotheses are suggested.
Picture:
|
|
| |
|
