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471.
Variability of certain chemotypes in three accessions of German chamomile (Matricaria chamomilla L.)
Bettina Faehnrich Pietro Nemaz Chlodwig Franz 《Genetic Resources and Crop Evolution》2014,61(7):1237-1244
In 203 analyzed chamomile plants, several compounds appreciated for their medicinal value, were evaluated qualitatively and quantitatively. α-Bisabolol and its oxides A and B were measured by gas chromatography; matricine as a precursor of chamazulene, was assessed semi-quantitatively by matching visually thin layer chromatography bands with a concentration range of the pure substance and the flavonoids apigenin and apigenin-7-glycoside were quantified by high performance liquid chromatography. Mean values of all compounds were compared in the three chamomile accessions ‘Manzana’, ‘Lutea’ and ‘Hungarian 2’. Correlations between different substances over all data were calculated. Moreover, certain groups combining particular properties according to their desired purpose or specificity, were formed. Their incidence in the particular chamomile varieties was determined. ‘Manzana’, a tetraploid cultivar, exhibited the highest share of the valuable bisabolol–matricine-type and the lowest ratio of bisabolol-oxides to bisabolol. To develop ‘high-quality-populations’, defined individuals of this cultivar shall be selected for further breeding. 相似文献
472.
Franz Conen Kristiina Karhu Jens Leifeld Barbara Seth Pekka Vanhala Jari Liski Christine Alewell 《Soil biology & biochemistry》2008,40(10):2703-2705
Predictions of future climate change critically depend on the temperature sensitivity of soil organic carbon decomposition. One question of debate is whether temperature sensitivity differs between young or labile and old or more stable carbon pools. We re-analysed soil that has previously led to the conclusion that old soil carbon is more temperature sensitive. The re-analysis gave different results compared to the earlier study, most likely due to small differences in an otherwise very similar experimental approach. This study illustrates how conclusions may depend upon details of the experimental setting. 相似文献
473.
Martinek B Bago Z Flöck M Hochsteiner W Schilcher F Kofler J 《Veterinary journal (London, England : 1997)》2006,172(1):181-184
Clinical, ultrasonographic, radiographic and pathological findings of a chondrosarcoma diagnosed in an 8-year-old Simmental cow are reported. The primary site was located in the cartilage of the right scapula at the angulus cranialis. The tumour had already spread to the lungs at the time of diagnosis. This is the first report of a bovine scapula chondrosarcoma. 相似文献