Changes of terpene content in milk from cows grazing natural diversified upland pasture were examined in this observational trial. A homogeneous plot divided into 2 subplots was used from May 31 to July 1, 2003 (first growth) and again from October 1 to October 7, 2003 (vegetative regrowth). Each subplot was grazed by 6 dairy cows in 2 ways: strip grazing (SG), with new allocations of pasture strips at 2-d intervals, and paddock grazing (PG).
View Article and Find Full Text PDFThe qualitative and quantitative composition of the main aromatic and polyphenolic constituents of infusion from Chamaemelum nobile flowers was examined. The camomile tea contained a large amount of polyphenolic compounds (340 mg/l), the most important being chamaemeloside (155 mg/l). Only traces of essential oil were recovered in tea (7 mg/l).
View Article and Find Full Text PDFDried flowering tops of 24 harvested batches (Artemisia vulgaris: 13; Artemisia verlotiorum: 11) and 12 batches of mugwort from commercial origin were examined. The levels of principal compounds averaged respectively: total hydroxycinnamic acids 6.09; 10.
View Article and Find Full Text PDFThe two major caffeoylquinic acids, 3,5-di-O-caffeoylquinic acid and 1,5-di-O-caffeoylquinic acid, were new-isolated from the flowering tops of Artemisia vulgaris (yield 2.0% and 0.3% on dry weight, respectively) and characterized by spectroscopic analysis.
View Article and Find Full Text PDFDried flowering aerial parts of 12 harvested batches and 9 batches of commercial origin from Viola arvensis Murray were examined. The levels of principal compounds averaged respectively: total flavonoids 2.86 and 1.
View Article and Find Full Text PDFJ Agric Food Chem
January 2001
The volatile components from nine plants growing on natural grasslands in Auvergne, central France, selected for the broad qualitative and quantitative diversity of their terpenoid fractions, were analyzed by high-resolution gas-phase chromatography and mass spectrometry (HRGC-MS) after static headspace solid-phase microextraction (SHS-SPME). SHS-SPME allowed all the plant material to be analyzed under the same conditions despite its wide-ranging composition. This is not always possible with other extraction methods.
View Article and Find Full Text PDFDried flowering tops of Hypericum perforatum L. (16 batches) and H. maculatum (3 batches) were studied according to the harvest period.
View Article and Find Full Text PDFQuercetin 3-O-alpha-L-arabinopyranoside (1) was isolated from the aerial parts of Alchemilla xanthochlora and characterized by spectroscopic analysis.
View Article and Find Full Text PDFLuteolin 3'-O-beta-D-glucuronide (1) was isolated from the leaves of Melissa officinalis subsp. officinalis and characterized by spectroscopic analysis.
View Article and Find Full Text PDFDried flowers (1 batch) and leaves (6 batches) of sour orange Citrus aurantium L. had a similar flavonoid pattern. But the flavonoid levels of flowers were higher than those of leaves.
View Article and Find Full Text PDFDried leaves of 9 harvested batches and 5 batches of commercial origin from Corylus avellana L. were examined. The levels of principal polyphenolic compounds averaged respectively: total flavonoids 2.
View Article and Find Full Text PDFDried aerial parts of Alchemilla xanthochlora Rothm. (16 batches), A. glabra Neygenf.
View Article and Find Full Text PDFDried flowering aerial parts of 11 harvested batches and 14 batches of commercial origin from Sisymbrium officinale L. were examined. The levels of principal constituents averaged respectively: total glucosinolates 0.
View Article and Find Full Text PDFA new flavonoid di-C-glycoside, violarvensin (1), was isolated from the aerial parts of Viola arvensis, together with the known derivative violanthin (2). The structure of 1 was established as apigenin-6-C-beta-D-glucopyranosyl-8-C-beta-D-6-deoxygulopyrano side by spectral analysis.
View Article and Find Full Text PDFDried leaves of 14 harvested batches and one batch from commercial origine of Vaccinium myrtillus L present a similar polyphenolic pattern. The mean levels of the harvested batches and the levels of the commercial batch were respectively: total polyphenol compounds 12.98 and 10.
View Article and Find Full Text PDFDried leaves of Betula pendula Roth (14 batches) and B. pubescens Ehrh. (3 batches) present a similar flavonoid pattern.
View Article and Find Full Text PDFThe qualitative and quantitative composition of the main aromatic and polyphenolic constituents of Mitcham type peppermint (Mentha x piperita L.) tisane, were examined and compared with those of leaves before and after infusion. The original peppermint leaves contained 2.
View Article and Find Full Text PDFPharm Acta Helv
February 1992
Hydroalcholic extracts from four native medicinal Lamiaceae, Lycopus europaeus L., Melissa officinalis L., Origanum vulgare L.
View Article and Find Full Text PDFA crude hydroalcoholic extract from Hibiscus sabdariffa L. calyces showed in vitro an appreciable enzyme-inhibiting activity towards the Angiotensin I Converting Enzyme (ACE), attributable to flavones, but weak inhibiting activities towards elastase, trypsin and alpha-chymotrypsin. The angioprotective activity in vivo, also important, was due to flavones and anthocyanins.
View Article and Find Full Text PDFA number of medicinal species of the Apiaceae, Borraginaceae and Lamiaceae families present high rosmarinic acid and total hydroxycinnamic derivative contents. Species of genera Sanicula (Apiaceae), Lycopus, Melissa, Mentha, Origanum and Salvia (Lamiaceae) contain rosmarinic acid in large amount, more than 3%, based on dry weight. The antioxidant activity of hydroalcoholic extracts, on DPPH, is partly in relation with the hydroxycinnamic derivative content.
View Article and Find Full Text PDFFrom 42 Rosaceae species, only the Rosoideae species exhibit high tannin content and elastase inhibiting activity such as Filipendula ulmaria, Geum montanum, G. rivale, Alchemilla xanthochlora and Sanguisorba minor. Other studied species from Spiraeoideae, Maloideae and Prunoideae subfamilies are less rich in tannin and also less active.
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