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    Wyświetlanie 1-7 z 7
    Tytuł:
    Evaluation of antiepileptic activity of methanolic leaves extract of Tragia involucrata Linn. in mice
    Autorzy:
    Varma, G.G.
    Mathai, B.K.
    Das, K.
    Gowda, G.
    Rammohan, S.
    Einstein, J.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/11927.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    antiepileptic drug
    antiepileptic activity
    methanolic extract
    leaf
    plant extract
    Tragia involucrata
    Indian stinging nettle
    mice
    mouse
    anticonvulsant action
    pentylenetetrazol
    picrotoxin
    Opis:
    The present investigation was aimed to study an antiepileptic activity of methanolic extract of Tragia involucrata Linn in mice. In vivo screening models like maximal electroshock-induced convulsion (MES), pentylenetetrazole (PTZ) and picrotoxin (PTX) induced models are used to evaluate the antiepileptic effects of the extracts. The biochemical estimation was done by measuring the lipid peroxidation and reduced glutathione (GSH). In the MES induced convulsion, methanolic extract of Tragia involucrata (METI) at high dose (800 mg/kg body weight), showed high significant inhibition on tonic hind limb extension (THLE, 6.83 ±0.30***) and decrease in duration of stupor period (108.7 ±6.53***). In PTZ and PTX induced model METI (400 mg/kg and 800 mg/kg) showed significant delay on the onset of convulsions, decreased duration of convulsion and reduced mortality significantly. It also showed significant decrease in brain MDA level in lipid peroxidation profile, and increase in the brain glutathione levels in mice against PTZ induced convulsion. The results confirmed that Tragia involucrata Linn possesses dose dependent antiepileptic activity.
    Źródło:
    International Letters of Natural Sciences; 2014, 12, 2
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical constituents of ethanol extract of leaves and molluscicidal activity of crude extracts from Vitex trifolia Linn.
    Składniki chemiczne etanolowego wyciągu z liści i działanie przeciwślimakowe nieoczyszczonego wyciągu z Vitex trifolia Linn.
    Autorzy:
    Jangwan, J.S.
    Aquino, R.P.
    Mencherini, T.
    Picerno, P.
    Singh, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/71567.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    chemical constituent
    ethanol extract
    leaf
    molluscicidal activity
    crude extract
    Vitex trifolia
    Verbenaceae
    beta-sitosterol
    ursolic acid acetate
    Opis:
    β-sitosterol and two triterpenoids: ursolic acid acetate and platanic acid have been isolated from ethanolic extract of Vitex trifola leaves. β-sitosterol was previously isolated from the leaves, stem and seeds of Vitex trifolia. Ursolic acid acetate has been isolated for the first time in this plant species. Platanic acid has been reported for the first time in Vitex trifolia and even in the family of this plant: Verbenaceae. These compounds were characterized using spectroscopic methods including 1D-1HNMR, 13CNMR, ESIMS and 2D-NMR (HSQC, HMBC, COSY) experiments and confirmed by comparison of their NMR data with those from the literature. A preliminary molluscicidal test for ethanol, chloroform and n-hexane extracts of leaves of Vitex trifolia against Biomphalaria alexandrina adult snails showed that ethanol extract of leaves with LC50 value 26.42 mg/l (27.92 mg/l – 24.99 mg/l) was more effective than n-hexane extract with LC50 value 35.48 mg/l (43.81 mg/l – 28.72mg/l) and chloroform extract with LC50 value 46.77 mg/l (53.59 mg/l – 43.81 mg/l) after 24 h exposure.
    Z etanolowego wyciągu z liści Vitex trifola wyizolowano β-sitosterol i dwa triterpenoidy: octan kwasu ursolowego i kwas platanowy. Poprzednio z liści, łodyg i nasion Vitex trifola był wyizolowant β-sitosterol. Octan kwasu ursolowego został wyizolowany po raz pierwszy z rośliny tego gatunku. Występowanie kwasu platanowego w Vitex trifolia oraz w rodzinie Verbenaceae zostało opisane po raz pierwszy. Składniki te scharakteryzowano, używając metod spektroskopowych, stosując badania 1D-1HNMR, 13CNMR, ESIMS and 2D-NMR (HSQC, HMBC, COSY) oraz potwierdzono porównaniem ich danych NMR z danymi literaturowymi. Wstępny test działania przeciwślimakowego wyciągów etanolowego, chloroformowego i n-heksanowego z liści Vitex trifolia przeciw dorosłym ślimakom Biomphalaria
    Źródło:
    Herba Polonica; 2013, 59, 4
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of phenolic acids isolated from blackcurrant and sour cherry leaves on grain aphid [Sitobion avenae F.]
    Autorzy:
    Chrzanowski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/55421.pdf
    Data publikacji:
    2008
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    sour cherry
    plant extract
    Sitobion avenae
    isolate
    Prunus cerasus
    leaf
    Ribes nigrum
    biopesticide
    grain aphid
    black currant
    phenolic acid
    Opis:
    Effect of plant phenolics isolated from leaves of blackcurrant (Ribes nigrum L.) and sour cherry (Prunus cerasus L.) as potential biopesticides against the grain aphid was examined. The extracts from the sour cherry contained a twice higher level of salicylic acid than extract from leaves of the blackcurrant. Moreover, concentration of chlorogenic acid was higher in sour cherry and the content of tannic acid within both plant tissues was at the same level. Both examined extracts had a negative effect on development of the grain aphid when the aphid fed on wheat plants sprayed with 1.0%, 2.5% and 5.0% solutions. The length of prereproductive period (time from birth to maturity) of the aphids was extended from 5.9 days on control plants (not sprayed) to 8.1 days, when the aphids were fed on the treated plants. Apterous females of Sitobion avenae fed on sprayed plants showed lower fecundity and lower values of intrinsic rate of natural increase.
    Źródło:
    Pestycydy; 2008, 1-2; 127-133
    0208-8703
    Pojawia się w:
    Pestycydy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The optimization of extraction process of white mulberry leaves and the characteristic bioactive properties its powder extract
    Autorzy:
    Przygonski, K.
    Wojtowicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/71471.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    extraction
    optimization
    white mulberry
    Morus alba
    leaf
    bioactive property
    powder extract
    antioxidant activity
    flavonoids
    1-deoxynojirimycin
    1-DNJ zob.1-deoxynojirimycin
    Opis:
    ntroduction: Powder extracts from white mulberry leaves (Morus alba L.) are desirable due to their simplicity of use. Powders intended for use in food and dietary supplements can be obtained by various methods, including water extraction and spray drying. Objective: The aim of the work was to optimize the aqueous process of extraction of white mulberry leaves and characterization of bioactive properties of the obtained extract powder. Methods: The DNJ and flavonoids (quercetin, kaempferol) contents and were analysed by high performance liquid chromatography (HPLC). Total phenolic contents were determined using the Folin-Ciocalteu phenol reagent and antioxidant activity by ABTS and DPPH assays. Results: The mulberry leaf extraction process has been optimized. The obtained powdered mulberry leaf extract proved to be a good source of bioactive compounds. Characteristic phenolic compounds detected in mulberry leaves and their powder extract were quercetin and kaempferol. The sum of polyphenols was 10.9 mg GAE/g dry matter in the raw material, whereas in the powder extract 42.6 mg GAE/g dry matter. In addition, it was found that the obtained powdered extract is characterized by a five-fold higher, in comparison to the raw material, the content of antioxidant activity measured by ABTS and DPPH tests. The content of 1-deoxynojirimycin (DNJ) in the powder extract was nearly four times higher than in dry mulberry leaves. Conclusion: The optimized process of water extraction of white mulberry leaves allows to keep valuable bioactive components and to obtain their high concentration.
    Źródło:
    Herba Polonica; 2019, 65, 1
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antiradical properties of extracts from roots, leaves and fruits of six Rumex L. species
    Autorzy:
    Wegiera, M.
    Grabarczyk, P.
    Baraniak, B.
    Smolarz, H.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/19601.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    antiradical property
    plant extract
    root
    leaf
    fruit
    Rumex
    tannin
    antioxidant activity
    Opis:
    We used the DPPH method to assess in vitro the antiradical activity of extracts from the roots, leaves and fruits of six Rumex L. (dock) species. Data from preliminary screening indicated that all the tested extracts showed antioxidant properties. The degree of antiradical activity depended upon the plant part. Fruit extracts from R. hydrolapathum Huds., R. obtusifolius L. and R. confertus Willd. showed stronger antiradical properties than the other tested material. We also determined tannin content levels in the extracts and their correlation with antioxidant activity.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2011, 53, 1
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurements of essential oil extract and antioxidants in Syrian Myrtus communis L. leaves using photochemiluminescence assay
    Określenie zawartości olejku eterycznego i przeciwutleniaczy w mircie zwyczajnym (Myrtus communis L.) rosnącym w Syrii za pomocą metody fotochemoluminescencyjnej
    Autorzy:
    Zayzafoon, G.
    Odeh, A.
    Mahzia, Y.
    Allaf, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/72322.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    measurement
    essential oil extract
    antioxidant
    Myrtus communis
    leaf
    photochemiluminescence
    ascorbic acid
    Syria
    medicinal plant
    Opis:
    The essential oil extracts and antioxidant measurements of Syrian Myrtus communis L. leaves as hydrophilic and hydrophobic existence species have been carried out. The plant leaves as a source of antioxidants was tested by the influence of its aqueous and essential oil extracts on the yield of PCL solution applying very sensitive and reliable method. By means of a PCL assay, it was possible to assess the total antioxidants capacity of hydrophilic and hydrophobic species existence in Syrian Myrtus communis L. leaves. It has been found that the integral antioxidant capacity value of Syrian Myrtus communis L. leaves was found in Kurdaha site which has a value of 465.67±1.18 TE/g DM. The following three main substances were found in the essential oil extracts: a-pinene, cineole and limonene.
    W mircie zwyczajnym (Myrtus communis L.), roślinie zawierającej związki hydrofilne i hydrofobowe występującej w Syrii, przeprowadzono badanie olejku eterycznego pod kątem obecności przeciwutleniaczy. Zawartość przeciwutleniaczy w liściach rośliny badano dla wyciągu wodnego i olejku eterycznego stosując czułą i godną zaufania metodę fotochemoluminescencji (PCL). Za pomocą PCL można było określić całkowitą zdolność przeciwutleniającą związków hydrofobowych i hydrofilnych liści mirtu zwyczajnego rosnącego w Syrii. Stwierdzono, że zmierzona aktywność przeciwutleniająca w liściach zebranych na stanowisku Kurdaha miała wartość 465.67±1.18 TE/g DM. W olejku eterycznym znaleziono trzy główne związki: a-pinen, cineol i limonen.
    Źródło:
    Herba Polonica; 2011, 57, 3
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and ultrastructural study of Capsicum annuum leaves after treatment with Uncaria tomentosa bark extracts
    Autorzy:
    Tykarska, T
    Gulewicz, K.
    Zobel, A.
    Augustynowicz, J.
    Zurowska, K.
    Kuras, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/56812.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    uncaria tomentosa
    structure
    extract
    Capsicum annuum
    treatment
    greenhouse condition
    leaf
    ultrastructure
    plant
    Opis:
    The influence of an Uncaria tomentosa extract on the development of Capsicum plants grown in green-house conditions was examined. The effect of the treatment was investigated with microscopic techniques (light and electron microscope) in leaves from three levels of control plants and plants after treatment with the extract added to the soil in doses of 0.4 and 16 mg/ml (200 ml per pot/plant). In control leaves, changes typical of the subsequent phases of normal development were observed: nuclear chromatin became slightly condensed, plastoglobuli of chloroplasts increased in number and size, intragranal thylakoids were somewhat dilatated. In addition to such commonly occurring changes, some symptoms typical of pepper were observed in the ontogenesis of the examined plant: an increased number of spherical electron-dense deposits in vacuoles, an increased number of peroxisomes, the occurrence of numerous paracrystalline structures in chloroplasts of mature leaves, and, starting in mature leaves, expulsion of plastoglobuli from chloroplasts. After the treatment, most of those changes, leading to ageing, occurred much earlier and were more distinct. Chloroplasts, already in the youngest examined leaves, showed dilatation of intergranal thylakoids, which intensified with aging of the leaves and degradation of grana in the oldest leaves. Starch grains decreased in size and number and plastoglobuli became large. Vesiculation of ground cytoplasm in all leaves was stronger than in the control. No paracrystalline structures in chloroplasts or expulsion of plastoglobuli were observed. Another unusual phenomenon was the disappearance of spherical electron-dense deposits in the central vacuoles of cells. Those observations suggested that U. tomentosa extract enhanced the natural ontogenesis of Capsicum annuum leaves, by accelerating and enhancing the typical characteristics of ageing, and, additionally, it changed the structure and physiology of cells.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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