Wyniki wyszukiwania - Biblioteka Nauki

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Antioxidant and chemical properties of Inula helenium root extracts

100%

Spiridon I. , Nechita C. , Niculaua M. , Silion M. , Armatu A. , Teacă C.-A. , Bodîrlău R.

Open Chemistry

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2013

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tom 11

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nr 10

1699-1709

EN

The objective of the paper was to investigate the chemical composition of Inula helenium roots extracts and to evaluate the antioxidant potential conferred by the chemical constituents. GC/MS and HPLC/MS techniques were used to characterize two extracts separated from Inula helenium roots by extraction with chloroform and ethyl acetate, respectively. Volatile compounds have been identified by GC from their mass spectra and retention time values, while HPLC identification of phenolic compounds was realized by comparing their retention times, UV and MS spectra with those of standards or literature data. Measurements of antioxidant activity of Inula helenium root extracts showed a variation between them, which can be correlated with the flavonoid and total phenolic contents. Both Inula helenium root extracts contain phenolic acids (caffeic, chlorogenic, dicaffeoyl quinic, hydroxibenzoic), terpenes (alantolactone) and different flavonoids (epicatechin, catechin gallate, ferulic acid-4-O-glucoside, dihydroquercetin pentosyl rutinoside, kaempherol-7-O-dipentoside, quercetin-3-O-β-glucopyranoside). In addition, the study provides preliminary data on the anti-inflammatory activity of Inula helenium root extracts, this being evaluated using the fresh egg albumin as phlogistic agent, and aspirin as reference compound. Root extracts of I. helenium did not exert any significant anti-inflammatory effect on egg albumin-induced rat paw edema. [...]

2

Zwalczanie chwastow jedno-i dwulisciennych w uprawach omanu wielkiego [Inula helenium L.]

81%

Kucharski W. A. , Kordana S. , Mordalski R. , Gnusowski B.

Progress in Plant Protection

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2001

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tom 41

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nr 2

891-893

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Fenolokwasy z ziela i korzeni Inula helenium L.

72%

Sokolowska-Wozniak A. , Bogucka-Kocka A. , Zgorka G.

Herba Polonica

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1995

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tom 41

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nr 2

64-69

EN

Hie occurrence of phenolic acids in the herb and roots from inula helenium L. was determined by the method of two-dimensional thin layer chromatography TLC. Hie quantitative contents of principal phenolic acids in this material was determined by the HPLC methods.

PL

Metodą dwukierunkowej chromatografii cienkowarstwowej TLC określono występowanie fenolokwasów w zielu i korzeniach Inula helenium L. oraz metodą wysokosprawnej chromatografii cieczowej HPLC oznaczono zawartość głównych kwasów w badanym surowcu.

4

Anatomy and ultrastructure of floral nectary of Inula helenium L. [Asteraceae]

72%

Sulborska A. , Weryszko-Chmielewska E.

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nr 3

EN

Floral nectaries of Inula helenium L. only occurred in disc florets and were situated above the inferior ovary. The shape of the investigated glands (five-armed star with rounded tips and deep incisions - observed from above) clearly differed from the shape of the nectaries of other Asteraceae, also the height of nectary was much lower (129 µm). The glandular tissue of the nectaries of elecampane was composed of a single-layered epidermis and 5--9 layers of secretory cells. Nectar was released through modified stomata, mainly arranged in the top part of the gland. The secretory cells were characterised by granular cytoplasm and the presence of a large, often lobate, cell nucleus. In the cytosol, numerous amoeboid plastids, mitochondria, Golgi bodies and ribosomes were present. In small vacuoles, myelin-like structures, fibrous material and vesicles with the content of substances which can be secretion, were observed. The plastid stroma showed different electron density and the presence of internal tubules and plastoglobules. Vesicular extensions forming bright zones were visible between the membranes of the nuclear envelope. Adjacent to the plasmalemma, as well as between the plasmalemma and the cell wall, secretory vesicles occurred, indicating the granulocrine mechanism of nectar secretion.

5

Distribution and structure of internal secretory reservoirs on the vegetative organs of Inula helenium L. [Asteraceae]

58%

Sulborska A.

Acta Agrobotanica

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2007

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tom 60

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nr 1

EN

The aim of the study was to investigate the structure and topography of endogenous secretory tissues of Inula helenium L. By using light and electron microscopy, morphological and anatomical observations of stems, leaves and rhizomes were made. It was shown that in the stems secretory cavities were situated in the vicinity of phloem and xylem bundles. The number of the reservoirs reached its maximum value (34) at shoot flowerig termination, whereas the cavities with the largest diameter were observed at full flowering stage (44.6 µm). In the leaf petioles and midribs, the reservoirs also accompanied the vascular bundles, and their number and size increased along with the growth of the assimilation organs. Observations of the cross sections of the rhizomes revealed the presence of several rings of secretory reservoirs. The measurements of the cavities showed that as a rule the reservoirs with a larger dimension were located in the phelloderm, whereas the smallest ones in the xylem area. The secretory cavities located in the stems and leaves developed by schizogenesis, whereas the rhizome reservoirs were probably formed schizolisygenously. The cells lining the reservoirs formed a one - four-layered epithelium. Observed in TEM, the secretory cells of the mature cavities located in the rhizomes were characterised by the presence of a large central vacuole, whereas the protoplast was largely degraded. Fibrous elements of osmophilic secretion and numerous different coloured vesicles could be distinguished in it. The cell walls formed, from the side of the reservoir lumen, ingrowths into the interior of the epithelial cells. Between the cell wall and the plasmalemma of the glandular cells, a brighter periplasmatic zone with secretory vesicles was observed.

PL

Celem pracy było zbadanie struktury i topografii endogennych tkanek wydzielniczych Inula helenium L. Wykorzystując mikroskopię świetlną i elektronową przeprowadzano obserwacje morfologiczno-anatomiczne łodyg, liści i kłączy. Wykazano, że w łodygach zbiorniki wydzielnicze usytuowane były w sąsiedztwie wiązek łyko-drzewnych. Liczebność rezerwuarów osiągała maksimum (34) w fazie przekwitania pędów, zaś zbiorniki o największej średnicy obserwowano podczas pełni kwitnienia (44,6 µm). W ogonkach i nerwach głównych liści rezerwuary towarzyszyły również wiązkom przewodzącym a ich liczba i średnica wzrastała wraz z rozwojem organów asymilacyjnych. Obserwacje przekrojów poprzecznych kłączy ujawniły obecność kilku pierścieni rezerwuarów wydzielniczych. Pomiary zbiorników pokazały, że z reguły rezerwuary o największej średnicy zlokalizowane były w felodermie, najmniejsze zaś na obszarze ksylemu. Zbiorniki wydzielnicze usytuowane w łodygach i liściach powstawały na drodze schizogenezy, rezerwuary kłączowe zaś prawdopodobnie formowały się schizolizygenicznie. Komórki wyścielające rezerwuary tworzyły 1-4-warstwowy epitel. Oglądane w TEM komórki wydzielnicze dojrzałych zbiorników zlokalizowanych w kłączach, cechowały się obecnością dużej centralnej wakuoli, protoplast zaś był w znacznym stopniu zdegradowany. Można było wyróżnić w nim fibrylarne elementy osmofilnej wydzieliny oraz liczne, różnobarwne pęcherzyki. Ściany komórkowe tworzyły od strony luki ekskretów wpuklenia do wnętrza komórek epitelialnych. Pomiędzy ścianą komórkową a plazmolemą komórek gruczołowych obserwowano jaśniejszą strefę peryplazmatyczną z pęcherzykami wydzielniczymi.

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Mniej znane miododajnie i pyłkodajne byliny, cz. 4

44%

Sulborska A.

Pasieka

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2015

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nr 1

7

Oman wielki [Inula helenium L.]

36%

Bonenberg K.

Aura

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2001

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nr 01 Ziola a Zdrowie nr 40

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