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Tytuł:
Cytotoxic flavonoids from Diplotaxis harra (Forsk.) Boiss. growing in Sinai
Cytotoksyczność flawonoidów pochodzących z roslin Diplotaxis harra (Forsk.) Boiss. osnącej na Półwyspie Synaj
Autorzy:
Mohammed, M.M.D.
El-Sharkawy, E.R.
Matloub, A.A.
Powiązania:
https://bibliotekanauki.pl/articles/71877.pdf
Data publikacji:
2011
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
cytotoxic flavonoids
flavonoids
cytotoxicity
Diplotaxis harra
Sinai
medicinal plant
Opis:
As a part of our ongoing collaborative effort to discover the anticancer activity of the phenolics isolated from terrestrial plant sources, the EtOH extract of the aerial parts of the Egyptian medicinal plant Diplotaxis harra (Forsk.) Boiss. was in vitro investigated for its cytotoxicity against HCT116, HepG2 and MCF-7 cell lines, and resulted with IC50=4.65, 12.60 and 17.90 μg/ml, respectively. Doxorubicin (+ve control) showed in vitro cytotoxic activity with IC50=3.64, 4.57 and 2.97 μg/ml, respectively. The phenolic-rich fraction of the EtOH extract was subjected to further fractionation, which led to the isolation of five flavonoids identified as quercetin, quercetin 3-O-β-glucoside, isorhamnetin 7-O-β-glucoside, apigenin 3-O-β-rhamnoside and kaempferol 3-O-β-glucoside, according to its’ spectral data and comparison with the literature. Furthermore, the isolated flavonoids showed in vitro cytotoxicity against HCT116 cell line with IC50=20.1, 24.3, 22.8, 23.4 and 41.9 μg/ml as determined by MTT method.
W ramach badań nad poszukiwaniem nowych związków fenolowych o aktywności przeciwnowotworowej pochodzących z roślin lądowych badaniom w kierunku cytotoksyczności w warunkach in vitro w poddano wyciąg alkoholowy z nadziemnych części egipskiej rośliny leczniczej Diplotaxis harra (Forsk.) Boiss. W wyniku przeprowadzonych badań cytotoksyczności z wykorzystaniem linii komórkowych HCT116, HepG2 oraz MCF-7 otrzymano odpowiednio następujące wartości: IC50=4,65, 12,60 oraz 17,90 μg/ml. Doksorubicyna (kontrola pozytywna) w warunkach in vitro wykazała w stosunku do badanych linii komórkowych następującą aktywność cytotoksyczną: odpowiednio IC50=6,64, 4,57 oraz 2,97 μg/ml. Dalsze rozdzielanie frakcji wyciągu etanolowego, bogatej w związki fenolowe, doprowadziło do wyizolowania pięciu flawonoidów: kwercetyny, 3-O-β-glukozydu kwercetyny, 7-O-β-glukozydu izoramnetyny, 3-O-β-ramnozydu apigeniny oraz 3-O-β-glukozydu kemferolu (zidentyfikowanych według danych spektralnych oraz na podstawie porównania z danymi pochodzącymi z literatury przedmiotu). Ponadto wyizolowane flawonoidy wykazywały in vitro cytotoksyczność określoną przy użyciu metody MTT w stosunku do linii HCT116 na poziomie IC50 =20,1, 24,3, 22,8, 23,4 oraz 41,9 μg/ml.
Źródło:
Herba Polonica; 2011, 57, 3
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of selected flavonoids on glycosaminoglycans in human skin fibroblasts
Autorzy:
Wosek, J.
Kuźmicz, I.
Wiśniewska, R.
Nazaruk, J.
Galicka, A.
Powiązania:
https://bibliotekanauki.pl/articles/1918304.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Fibroblasts
glycosaminoglycans
flavonoids
Opis:
Purpose: Glycosaminoglycans (GAGs) and proteoglycans (PG) in addition to collagen are the main components of extracellular matrix (ECM). They play an important role in intercellular communication and interactions between cells and ECM. The biological changes in ECM that occur during aging are induced by decrease in GAG biosynthesis. The purpose of this study was to evaluate the effect of selected flavonoids isolated from Cirsium palustre (L.) Scop. on GAG content in human skin fibroblasts. Materials and methods: Human skin fibroblasts were treated with eriodictyol 7-O-glucoside (C1), 6-hydroxyluteolin 7-O-glucoside (C2), scutellarein 7-O-glucoside (C3) and pedalitin (C4) at 1, 20 and 40 μM for 24 h. Concentration of GAGs in the medium was assayed using method based on their ability to bind the cationic dye 1,9- dimethylmethylene blue (DMMB). Results: C1, C2 and C4 at concentration of 20 and 40 µM significantly increased content of sulphated GAGs in the medium. In contrast, treatment of cells with compound C3 did not have a statistically significant impact on GAG level. Ascorbic acid used as a positive control at 50 µM showed no effect on GAG concentration and increased their content at 100 µM but to a much lower extent than flavonoids. Conclusion: Flavonoids C1, C2 and C4 showed greater than ascorbic acid stimulatory impact on GAGs in healthy human skin fibroblasts, demonstrating their therapeutic potential in the aging.
Źródło:
Progress in Health Sciences; 2016, 6(2); 59-63
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation between mammalian cell cytotoxicity of flavonoids and the redox potential of phenoxyl radical/phenol couple
Autorzy:
Marozienė, Audronė
Nemeikaitė-Čėnienė, Aušra
Vidžiūnaitė, Regina
Čėnas, Narimantas
Powiązania:
https://bibliotekanauki.pl/articles/1039753.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cytotoxicity
antioxidants
flavonoids
oxidative stress
Opis:
Flavonoids exhibit prooxidant cytotoxicity in mammalian cells due to the formation of free radicals and oxidation products possessing quinone or quinomethide structure. However, it is unclear how the cytotoxicity of flavonoids depends on the ease of their single-electron oxidation in aqueous medium, i.e., the redox potential of the phenoxyl radical/phenol couple. We verified the previously calculated redox potentials for several flavonoids according to their rates of reduction of cytochrome c and ferricyanide, and proposed experimentally-based values of redox potentials for myricetin, fisetin, morin, kaempferol, galangin, and naringenin. We found that the cytotoxicity of flavonoids (n=10) in bovine leukemia virus-transformed lamb kidney fibroblasts (line FLK) and murine hepatoma (line MH-22a) increases with a decrease in their redox potential of the phenoxyl radical/phenol couple and an increase in their lipophilicity. Their cytotoxicity was decreased by antioxidants and inhibitors of cytochromes P-450, α-naphthoflavone and isoniazide, and increased by an inhibitor of catechol-O-methyltransferase, 3,5-dinitrocatechol. It shows that although the prooxidant action of flavonoids may be the main factor in their cytotoxicity, the hydroxylation and oxidative demethylation by cytochromes P-450 and O-methylation by catechol-O-methyltransferase can significantly modulate the cytotoxicity of the parent compounds.
Źródło:
Acta Biochimica Polonica; 2012, 59, 2; 299-306
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flavonoids as reductants of ferryl hemoglobin
Autorzy:
Gebicka, Lidia
Banasiak, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1040549.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
methemoglobin
ferryl hemoglobin
oxyhemoglobin
flavonoids
Opis:
The ferryl derivatives of hemoglobin are products of the reactions of oxy- and methemoglobin with hydrogen peroxide. Ferryl hemoglobins, either with or without a radical site on the protein moiety, are oxidizing species. Plant polyphenols, flavonoids, have been shown to act as antioxidants in vivo and in vitro. Reactions of met- and oxyhemoglobin with hydrogen peroxide in the presence of catechin, quercetin and rutin were studied. These flavonoids accelerated reduction of ferryl hemoglobin to methemoglobin. The rate constants of the reactions of ferryl hemoglobin with catechin, quercetin and rutin were in the order of 102 M-1 s-1, i.e. similar to the rate constants of ferryl hemoglobin with intracellular reducing compounds like urate or ascorbate. The beneficial effect of flavonoids against oxidative damage of hemoglobin caused by hydroperoxides, reported in the literature, is probably, at least in part, connected with the ability of flavonoids to scavenge ferryl hemoglobin.
Źródło:
Acta Biochimica Polonica; 2009, 56, 3; 509-513
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antimicrobial and antioxidant activity of Epimedium pinnatum
Przeciwbakteryjne i przeciwutleniające działanie Epimedium pinnatum
Autorzy:
Mahboubi, M.
Kazempour, N.
Hosseini, H.
Powiązania:
https://bibliotekanauki.pl/articles/72643.pdf
Data publikacji:
2013
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
antimicrobial activity
antioxidant activity
Epimedium pinnatum
medicinal plant
plant extract
phenolics
total phenolics
flavonoids
total flavonoids
Opis:
Epimedium pinnatum (Berberidaceae family) is used as an aphrodisiac in traditional Chinese medicine (TCM). The aim of this study was to evaluate the antimicrobial and antioxidant activity of E. pinnatum extracts (ethanol, methanol and aqueous extracts). Total phenolic (TPC) and flavonoid contents (TFC) of each extract were assessed by spectrophotometric methods. It was exhibited that methanol extract had better antimicrobial activity than those of ethanolic extract or aqueous extract. The TPC and TFC of E. pinnatum extracts was higher in methanol extract (149 and 36.6 mg/g) than that of ethanolic extract (137.2 and 19.5 mg/g) and aqueous extract (86.2 and 8.4 mg/g). The methanol extract had lower IC50 value (200 µg/ml) than ethanolic (250 µg/ml) and aqueous extract (400 µg/ml). There was a positive correlation between TPC, TFC in E. pinnatum extract and their antioxidant and antimicrobial activity.
W tradycyjnej medycynie chińskiej Epimedium pinnatum (rodzina Berberidaceae) używa się jako afrodyzjaku. Celem niniejszej pracy była ocena działania przeciwbakteryjnego i przeciwutleniającego wyciągów: etanolowego, metanolowego i wodnego z Epimedium pinnatum. Całkowita zawartość fenoli i całkowita zawartość flawonoidów w każdym z wyciągów została oznaczona metodami spektrofotometrycznymi. Wykazano, że wyciąg metanolowy miał lepsze działanie przeciwbakteryjne niż wyciąg etanolowy i wodny. Całkowita zawartość fenoli i całkowita zawartość flawonoidów była wyższa w wyciągu metanolowym (149 i 36,6 mg/g) niż etanolowym (137,2 i 19,5 mg/g) i wodnym (86,2 i 8,4 mg/g). Wyciąg metanolowy miał niższą wartość IC50 (200 µg/ml) niż wyciąg etanolowy (250 µg/ml) i wodny (400 µg/ml). Zauważono pozytywną korelację między całkowitym stężeniem fenoli i całkowitym stężeniem flawonoidów w wyciągach z E. pinnatum, a ich działaniem przeciwutleniającym i przeciwbakteryjnym.
Źródło:
Herba Polonica; 2013, 59, 2
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation and antioxidant activity of flavonoids from Holarrhena floribunda (G.don) leaves
Autorzy:
Badmus, Jelili
Ekpo, Okobi
Rautenbach, Fanie
Marnewick, Jeanine
Hussein, Ahmed
Hiss, Donavon
Powiązania:
https://bibliotekanauki.pl/articles/1038826.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
polyphenolics
plants
Holarrhena floribunda
antioxidant
flavonoids
Opis:
Bioactive polyphenolics are ubiquitously present in plants and may play an important role in the prevention and management of certain human diseases. Three known flavonoids viz Kaemperol-3-O-rutinoside (1), quercetin-3-O-glucoside (2) and kaemperol-3-O-glucoside (3) and inseparable mixture (1:1) of quercetin-3-O-glucose/galactose (4) were isolated, and identified for the first time from Holarrhena floribunda. The antioxidant capacity using the ORAC, FRAP and TEAC assays and inhibition of lipid peroxidation were measured for isolated flavonoids. The result showed that compounds 2 and 4 showed significantly increased ORAC, TEAC, and FRAP activities with low pro-oxidant potential as well as improved lipid peroxidation inhibition levels when compared to compounds 1 and 3. The most active compounds were found to be flavonoids with a quercetin basic structure. These results imply that the isolated flavonoid glycosides are responsible for the antioxidant activity of the plant leaves and it forms the scientific basis for its traditional usage.
Źródło:
Acta Biochimica Polonica; 2016, 63, 2; 353-358
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ANALYTICAL PROCEDURE ELABORATION OF TOTAL FLAVONOID CONTENT DETERMINATION AND ANTIMICROBIAL ACTIVITY OF BEE BREAD EXTRACTS
Autorzy:
Hudz, Nataliia
Yezerska, Oksana
Grygorieva, Olga
Brindza, Ján
Felsöciová, Soňa
Kačániová, Miroslava
Wieczorek, Piotr P.
Powiązania:
https://bibliotekanauki.pl/articles/895653.pdf
Data publikacji:
2019-06-28
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
antimicrobial activity
flavonoids
extracts
bee bread
Opis:
SSixteen ethanolic extracts were obtained from seven different bee bread samples. The total flavonoid content in the extracts was determined by aluminium-chloride method and was in the range of 8.3 mg/L±6.24% to 195.3 mg/L±1.35% and 28.8 mg/L±19.33% to 603.3 mg/L±4.64% with reference to quercetin and rutin, respectively. The relative standard deviations (RSD) for parallel measurements for the calibration curves of quercetin dehydrate and rutin trihydrate were in the range of 0.51% to 9.39% and 5.02% to 19.91%, respectively. The RSD for parallel measurements for the extracts with reference to quercetin dihydrate and rutin trihydrate were in the range of 0.23% to 11.64% and 4.64% 19.33%, respectively. The total flavonoid content mainly depended on a ratio of bee bread to 50% ethanol and technology of obtaining bee bread. The significant differences between results were statistically confirmed. The best antibacterial activity of bee bread extracts was found against Bacillus cereus CCM 2010, Clostridium perfringens CCM 4435, and Staphylococcus aureus subsp. aureus CCM 4223. The activity of the bee bread extracts against Gram negative bacteria, Aspergillus and Penicillium genera was lower with moderate anticandidal activity. The obtained results indicated that it was very important to employ extracts with a high content of bee bread in 50% ethanol (1:5, 1:10). According to the results of this study, bee bread is a product which is rich in flavonoids and with good antibacterial activity against Gram positive bacteria and can be considered as a raw material for development of diet supplements and antimicrobial medicinal products
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 3; 439-452
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PHYTOCHEMICAL ANALYSIS AND BIOLOGICAL EVALUATION OF FORSSKAOLEA VIRIDIS AERIAL PARTS
Autorzy:
El-Bassossy, Taha A.
Ahmed, Fatma A.
El-Mesallamy, Amani M.
Powiązania:
https://bibliotekanauki.pl/articles/895657.pdf
Data publikacji:
2019-10-30
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
antimicrobial
flavonoids
phenolics
antitumor
Forsskaolea viridis
Opis:
The chemical investigation of the chloroform and ethyl acetate extracts of the aerial parts of Forsskaolea viridis Ehrenb. ex Webb (Family: Urticaceae) led to isolation eight compounds for the first time from this plant, while two phenolic compounds, identified as p-coumaric and caffeic acids as well as six flavonoid compounds identified as 5-hydroxy-6,7,3',4'-tetramethoxy flavone, chrysoeriol, acacetin, chrysoeriol-7-O-β-D-glucoside, kaempferol-3-O-(2"-O-E--p-coumaroyl)-β-D-glucoside and isovetixin. The chemical structure of the isolated compounds was established by spectroscopic methods including UV, MS, 1H-NMR, and 13C-NMR. Antimicrobial, antioxidant and cytotoxic activities of the ethyl acetate and chloroform extracts were evaluated. The ethyl acetate extract exhibited strong antimicrobial activity (12-30 mm) against the tested strains. The ethyl acetate and chloroform extracts showed fair antioxidant and cytotoxicity.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 5; 815-823
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Facile Electrochemical Analysis to Determine Antioxidant Activity of Bee Pollen
Autorzy:
Rebiai, A.
Lanez, T.
Powiązania:
https://bibliotekanauki.pl/articles/412330.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Bee pollen
Antioxidant
Polyphenol
Flavonoids
voltammetry
Opis:
The aim of this study was to determine the phenolic and flavonoid content, and antioxidant properties of tow samples of bee pollen harvested from Algeria. The content of total polyphenolic compounds, flavonoids, and antioxidant activity by the cyclic voltammetry method were determined. The contents of polyphenolic compounds was 22.68 mg/g for the pollen from Blida and 21,9 mg/g for Tipaza pollen. High antioxidant activities were found for the cyclic voltammetry method, with values that ranged from 22,3 to 27,63 mg of AAE•g–1 pollen. The bee pollen of Blida showed high antioxidant activity probably due to the high content of polyphenolic compounds present in pollen.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 31-38
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polyphenols and flavonoids in the prevention and treatment of diabetes type 2
Autorzy:
Wałkuski, M.
Szwed, O.
Lendzioszek, M.
Terlikowska, K.M.
Powiązania:
https://bibliotekanauki.pl/articles/1918750.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Diabetes
diet
food
polyphenols
flavonoids
genes
alleles
Opis:
The genetic basis of diabetes is associated with genes that predispose to obesity development. There are also variants of genes that change the metabolism and distribution of glucose in the body tissues. Others regulate the lipid profile or affect insulin resistance, directly or indirectly affecting the risk of developing diabetes. Polyphenols are a group of compounds that have a protective effect on pancreatic cells. Thanks to their antioxidant activity, they protect cells against apoptosis, improve glucose metabolism and reduce hyperglycemia. The aim of the review was to discuss the mechanisms of bioactive food compounds influence on the human genome and to demonstrate their relationship between diabetes prevention and treatment.
Źródło:
Progress in Health Sciences; 2018, 8(2); 174-180
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CHEMICAL COMPOSITION OF THE ESSENTIAL OIL AND FLAVONOIDS OF THYMUS SERPYLLUM L., GROWING ON TERRITORY OF THE EAST KAZAKHSTAN
Autorzy:
Tazabayeva, Kulyash A.
Sylibaeva, Batiyash
Powiązania:
https://bibliotekanauki.pl/articles/895645.pdf
Data publikacji:
2018-12-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
essential oils
flavonoids
anticancer activity
Thymus serpyllum
Opis:
Thymus serpyllum L. (T.serpyllum) has a great interest as a potential plant component, which is used in the production of fermented milk products with anticancer effect. The plant material was collected at the flowering stage. Chemical composition of essential oil and flavonoids from the aerial parts of the T. serpyllum, grown in the Southern Altai of the East Kazakhstan region, has been investigated for the first time. Output of the essential oil received from the aerial part of the plant in the flowering stage was on average 0,2%. Forty-one compounds were identified in T. serpyllum essential oil, which accounts for 96, 1% of the total oil. The main components of the oil were thymol (41,8%), γ-terpinene (15,3%), o-cymene (10,9%). Apart from the composition of essential oils, there were shown some flavonoids, such asapigenin 7 glucoside (0.24 % of dried plant material), luteolin (0,039 %), quercetin (0,006 %), which demonstrated a cytotoxic effect on cancer cells. In our experiments, luteolin had greater cytotoxic effect on cancer cells HCT-15 than quercetin. IC50 value of quercetin (100 μM) was higher than that of luteolin (50 μM).
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 6; 1329-1337
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the phenolic contents and antibacterial activity of different concentrations of Onosma chlorotricum Boiss
Autorzy:
Dousti, B.
Nabipor, F.
Powiązania:
https://bibliotekanauki.pl/articles/2096818.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phenolic compounds
flavonoids
antibacterial activity
Onosma chlorotricum
Opis:
Because of side effects and increasing resistance to antibiotics, considerable attention hasbeen given to extract sand biologically active compounds isolated from medicinal plants. In the present study, phytochemical screening and antibacterial activities of different concentrations of various extracts of Onosma chlorotricum were evaluated and compared with those of vancomycin and amikacin. Total phenolic and flavonoid contents and the antibacterial activity of methanol, n-hexane, and aqueous extracts (5 mg/ml to 0.156 mg/ml final concentration) of O. chlorotricum against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli were evaluated using disc diffusion and microdilution methods. Total phenolic and flavonoid contents were determined according to the Folin-Ciocalteu and aluminum chloride colorimetric assays, respectively. The results showed that the total phenolic and flavonoid contents of these extracts ranged from 56.10 ± 0.13 to 74.12 ± 0.05 mg GAE/g dry extract and from 19.3 ± 0.6 to 23.20 ± 0.41 mg QE/g dry extract, respectively. The methanol extract with the highest phenolic and flavonoid content showed the highest antibacterial activity against all the tested bacterial strains, with the highest inhibition zone of 21 ± 0.7 mm and the lowest MIC and MBC values of 78.12 μg/ml for S. aureus. The antibacterial effects and the total phenolic content of O. chlorotricum were remarkable. The results suggest that the effects of methanol extract on wound healing could be tested in an animal model.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2021, 102, 4; 377-386
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combined effect of flavonoid compounds and cytostatics in cancer treatment
Autorzy:
Stompor, Monika
Podgórski, Rafał
Kubrak, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/454869.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
flavonoids
anticancer drugs
co-delivery system
cytostatics
Opis:
Aim. The aim of the study was to review the literature on the combination of cytostatics with flavonoids as a promising way to improve the cancer therapy. Material and methods. A review of Polish and foreign literature was performed. The following databases were searched: PubMed, Scopus, Science Direct, and Polish Medical Bibliography. Literature analysis. Effective strategies to inhibit the progression of cancer are needed. Compounds of natural origin, including plant polyphenols, are a part of our diet. Due to their availability, and antioxidant properties, they may serve as efficacious adjuvants in cancer therapy, enhancing the effectiveness of chemotherapeutics. Epidemiological studies have shown an inverse relationship between diets rich in fruits, vegetables, and supplements, and the risk of all causes of death from cancer. Based on their diverse biological activity, flavonoids may be potential adjuvant therapeutic agents that act synergistically with cytostatics for treatment of many types of cancer. This review of the results is a summary the research on anticancer activity of flavonoids and may also raise consciousness of consumers, who will be able to compose their diet armed with the knowledge of preventive and therapeutic anticancer properties of food ingredients. There is need for further research on polyphenols of plant origin, including interactions among food components that coexist. Another important aspect is to understand how the activity of phytocompounds depends on concentration and the presence of additional factors (e.g. microflore, metal ions), which could possibly make a compound harmful, instead of having positive theraputics effect. Elucidation of the mechanisms involved in biological activity of the described phytocompounds is essential for a better understanding of their influence on an organism.
Źródło:
European Journal of Clinical and Experimental Medicine; 2017, 2; 157-164
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plant secondary metabolites as defenses: A review
Autorzy:
Jusuf, Herlina
Elveny, Marischa
Azizova, Feruza
Shichiyakh, Rustem A.
Kulikov, Dmitriy
Al-Taee, Muataz M.
Atiyah, Karrar K.
Jalil, Abduladheem T.
Aravindhan, Surendar
Powiązania:
https://bibliotekanauki.pl/articles/2174280.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
alkaloids
flavonoids
phenolics
plant pathogens
secondary metabolites
Opis:
Plant secondary metabolites have a variety of functions, including mediating relationships between organisms, responding to environmental challenges, and protecting plants against infections, pests, and herbivores. In a similar way, through controlling plant metabolism, plant microbiomes take part in many of the aforementioned processes indirectly or directly. Researchers have discovered that plants may affect their microbiome by secreting a variety of metabolites, and that the microbiome could likewise affect the metabolome of the host plant. Pesticides are agrochemicals that are employed to safeguard humans and plants from numerous illnesses in urban green zones, public health initiatives, and agricultural fields. The careless use of chemical pesticides is destroying our ecology. As a result, it is necessary to investigate environmentally benign alternatives to pathogen management, such as plant-based metabolites. According to literature, plant metabolites have been shown to have the ability to battle plant pathogens. Phenolics, flavonoids, and alkaloids are a few of the secondary metabolites of plants that have been covered in this study.
Źródło:
Journal of Water and Land Development; 2022, 55; 206--211
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long wave UV-B radiation and Asahi SL modify flavonoid content and radical scavenging activity of Zea mays var. saccharata leaves
Autorzy:
Skorska, E.
Grzeszczuk, M.
Baranska, M.
Wojcik-Stopczynska, B.
Powiązania:
https://bibliotekanauki.pl/articles/2117893.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
biostimulator
DPPH
flavonoids
maize
photosynthesis
ultraviolet B
Opis:
The experiment on Zea mays L. cv. Landmark (F1) plants was performed in a greenhouse with UV-B (305–315 nm). The pots with plants were divided into four groups: the first and the second groups were grown, respectively, at low (1.0 kJ m -2 d -1 ) and high (3.0 kJ m -2 d -1 ) biological effective dose of UV-B radiation. Half of the pots of each group were sprayed with 0.1% solution of Asahi SL (the third and fourth groups). The intensity of photosynthe- sis and transpiration, chlorophyll fluorescence, the content of UV-absorbing compounds and radical scavenging activity were measured using DPPH after four and six weeks of UV-B radiation. After six weeks of irradiation with a higher UV-B dose both flavonoid content and antioxidant activity increased by 112% and by 44%, respectively, compared to the plants grown at the lower dose. The plants treated with Asahi SL and exposed to the high dose of UV-B had the content of flavonoids 80% higher than the control ones. Asahi SL decreased scavenging activity in both groups of plants by 17% and 32%, respectively, in comparison with the untreated plants. The intensity of net photosynthesis, the transpiration rate and chlorophyll fluorescence parameters (Fv/Fo, ETR, Rfd) did not differ in most of variants.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 1; 87-92
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ANALYSIS OF POLYPHENOLIC COMPOSITION AND STABILITY OF MAGISTRAL PREPARATION BASED ON SALVIAE OFFICINALIS FOLIUM
Autorzy:
Kowalczyk, Adam
Tuberoso, Carlo I.
Włodarczyk, Maciej
Fecka, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/895374.pdf
Data publikacji:
2020-02-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
flavonoids
phenolic acids
complexes
Salvia officinalis
magistral preparation
Opis:
A magistral preparation based on the sage leaf decoction or infusion is one of the most popular herbal prescription prepared in pharmacies in Lower Silesia (Poland) for gargling in the pharyngitis or mouth infections. Other components of this preparation are boric acid, aluminum(III) acetotartrate or Burow's solution, and glycerol. The study aimed to investigate the polyphenolic composition and relations between herbal and chemical ingredients that are present in this mixture in comparison with the traditional aqueous galenic forms – infusion and decoction. The analysis was performed using HPLC-DAD and ESI-MS methods. The main polyphenolic ingredients of sage leaf were rosmarinic acid and luteolin 7-O-β-glucuronide. The content of analyzed polyphenols was higher in the decoction than in the infusion. The pharmacological activity of the examined mixture results from the presence of boric acid, aluminum(III) salts and polyphenolic components of sage leaf. The study showed that in the presence of excess salts of aluminum(III) and boric acid, sage polyphenols are partially soluble in an aqueous medium (mainly phenolic acids) and complexed as precipitated sediment (especially flavonoids). The aqueous solutions of this preparation are cloudy, which suggests limited solubility of the formed complexes. Therefore, the therapeutic activity of the sage leaf magistral preparation should be associated with the presence of water soluble caffeic acid esters like rosmarinic acid. The influence of luteolin glycosides coordination complexes is not evident. The obtained results also confirm the stability of the examined formula in the conditions of cold storage (4-6 °C) within 7 days from its production.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 1; 131-143
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of kaempferide Mannich base derivatives and their antiproliferative activity on three human cancer cell lines
Autorzy:
Nguyen, Van-Son
Shi, Ling
Luan, Fang-Qian
Wang, Qiu-An
Powiązania:
https://bibliotekanauki.pl/articles/1039003.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
kaempferide
flavonoids
Mannich base derivatives
synthesis
antiproliferative activity
Opis:
Kaempferide (3,5,7-trihydroxy-4'-methoxyflavone, 1), a naturally occurring flavonoid with potent anticancer activity in a number of human tumour cell lines, was first semisynthesized from naringin. Based on Mannich reaction of kaempferide with various secondary amines and formaldehyde, nine novel kaempferide Mannich base derivatives 2-10 were synthesized. The aminomethylation occurred preferentially in the position at C-6 and C-8 of the A-ring of kaempferide. All the synthetic compounds were tested for antiproliferative activity against three human cancer cell lines (Hela, HCC1954, SK-OV-3) by the standard MTT method. The results showed that compounds 1, 2 and 5-10 were more potent against Hela cells with IC50 values of 12.47-28.24 μM than the positive control cis-platin (IC50 41.25 μM), compounds 5, 6, 8 and 10 were more potent against HCC1954 cells with IC50 values of 8.82-14.97 μM than the positive control cis-platin (IC50 29.68 μM), and compounds 2, 3, 5, 6 and 10 were more potent against SK-OV-3 cells with IC50 values of 7.67-18.50 μM than the positive control cis-platin (IC50 21.27 μM).
Źródło:
Acta Biochimica Polonica; 2015, 62, 3; 547-552
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of a Longwave UV-B Radiation on Soybean Plants Grown at Increased Nickel Concentration in Soil
Autorzy:
Skórska, Elżbieta
Matuszak-Slamani, Renata
Romanowski, Hubert
Szwarc, Wiktor
Powiązania:
https://bibliotekanauki.pl/articles/123597.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
chlorophyll fluorescence
flavonoids
Glycine max
photosynthesis
ultraviolet B
Opis:
Plants of soybean (Glycine max L.) cv. Augusta grew in the soil with addition of Ni in the concentration of 80 (C-80) or 120 mg∙kg-1 dry mass (C-120) or without Ni (C-0), and they were subjected to UV-B (300 nm – 315 nm) dose of 1.8 kJ m-2 d-1 for 28 days. The addition of nickel into soil in the concentration of 120 mg kg-1 (C-120) caused a decrease of the plant height by 35% compared to the control (C-0), and in the presence of UV-B (U-120) – by 43%. The shoot fresh and dry mass in the C-80 and C-120 plants were lower by 33% and 52% than in the C-0. In the presence of Ni, the intensity of net photosynthesis decreased by 55%. UV-B caused an increase of flavonoid content by 25% compared to the control (C-0), and Ni induced a reduction in the content of these compounds from 20% to 40%.
Źródło:
Journal of Ecological Engineering; 2019, 20, 5; 135-141
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polifenole - źródło naturalnych przeciwutleniaczy
Polyphenols - a source of natural antioxidants
Autorzy:
Sadowska, A.
Świderski, F.
Kromołowska, R.
Powiązania:
https://bibliotekanauki.pl/articles/227512.pdf
Data publikacji:
2011
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
polifenole
flawonoidy
aktywność przeciwutleniająca
polyphenols
flavonoids
antioxidant activity
Opis:
W artykule omówiono charakterystykę związków fenolowych, ich podział, budowę a także występowanie w surowcach żywnościowych. Przedstawiono również znaczenie polifenoli w kształtowaniu jakości żywności oraz ich funkcję jako przeciwutleniaczy.
This article discusses the characteristics of phenolic compounds, their distribution, structure and occurrence in food products. Also the importance of polyphenols in shaping the quality of food and their role as antioxidants is here shown.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2011, 1; 108-111
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ABA alleviated soybean seedling stress exposed to UV-C radiation
Autorzy:
Yang, L.
Gao, N.
Yang, Y.
Zhang, Y.
Gao, J.
Sun, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2082655.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
ultraviolet-C
ABA
active oxygen metabolism
flavonoids
soybean
Opis:
In order to understand the roles of abscisis acid in soybean exposed to UV-C radiation, soybean seedlings were exposed to UV-C radiation and ABA was applied. The chlorophyll content, active oxygen metabolism and flavonoids content of soybean seedlings were investigated. The present study revealed that UV-C radiation significantly attenuated the chlorophyll content and suppressed PSII activity. It was observed that the contents of H2O2, malondialdehyde and O2 - were markedly increased, and the activities of antioxidant enzymes such as superoxide dismutase, peroxidase and catalase were enhanced, so were the flavonoids content, whereas the seedling height and biomass were significantly reduced. ABA application improved the activities of superoxide dismutase, peroxidase, catalase and the contents of flavonoids, decreased the contents of H2O2, MDA and O2 -, and also increased the chlorophyll content and enhanced PSII performance, thus enhancing biomass accumulation. The results suggested that ABA alleviated UV-C damage to soybean seedlings by reducing ROS generation and enhancing antioxidase activity. The isoflavones daidzin and genistein were significantly responsive to UV-C.
Źródło:
International Agrophysics; 2020, 34, 1; 115-121
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and biological evaluation of 4-O-acetyl-isoxanthohumol and its analogues as antioxidant and antiproliferative agents
Autorzy:
Stompor, Monika
Świtalska, Marta
Podgórski, Rafał
Uram, Łukasz
Aebisher, David
Wietrzyk, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1038626.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
O-acylated flavanones
antiproliferative effect
isoxanthohumol
hop flavonoids
Opis:
Isoxanthohumol (2) and its 4'-O-monoacylated (3) and 7,4'-O-diacetylated (4) derivatives were synthesized and evaluated in vitro for their cytotoxic activity against several cancer cell lines of various origins: MCF-7 (breast), A549 (lung), MESSA (uterine sarcoma), LoVo (colon), drug-resistant human cancer cells (MESSA/DX and LoVo/DX), glioblastoma (U-118 MG), and also towards the non-cancerous cell line MCF-10A (normal breast cells). An antiproliferative assay indicates that 7,4'-di-O-acylisoxanthohumol (4) has similar cytotoxicity to its precursor, isoxanthohumol (2), against selected cell lines (A549, MES-SA, MES-SA/5DX, and U-118 MG). Compound 4 was only slightly more cytotoxic to lung, colon, breast (cancerous and normal) and uterine sarcoma (drug sensitive and drug resistant) cell lines compared to its monoacylated derivative (3). Both acylated isoxanthohumols showed preferential activity against tumor cells (MCF-7) and low cytotoxicity to normal cells (MCF-10A), which suggests selectivity of the acylated isoxanthohumols towards cancer cells. Additionally, the activity of the acylated isoxanthohumols was higher than for 2. To the best of our knowledge this is the first report on bioactivity of monoacylated isoxanthohumol (3) and its ester derivatives as antiproliferative compounds in drug resistant cell cultures. Acylation of 2 decreased the antioxidant activity determined by the DPPH method in the order isoxanthohumol (2) >4'-O-acetylisoxanthohumol (3) >7,4'-di-O-acetylisoxanthohumol (4).
Źródło:
Acta Biochimica Polonica; 2017, 64, 3; 577-583
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical characterization by TLC, UV, IR, HPLC-MS/MS and NMR of gossypetin-3’-O-glucoside from Talipariti elatum (Sw.) Malvaceae
Autorzy:
González, José
Cuéllar, Armando
Gaysinski, Marc
Massi, Lionel
Monan, Max
Nossin, Enmanuel
François-Haugrin, Frantz
Powiązania:
https://bibliotekanauki.pl/articles/1076714.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
IR
MS
NMR
TLC
Talipariti elatum
UV
flavonoids
Opis:
Talipariti elatum (Sw.) Malvaceae, also known as Blue Mahoe or Mountain Mahoe, commonly named as Majagua azul or Majagua, with red or crimson flowers, is a medicinal tree traditionally used against cough, asthma, catarrh, and expectorant. Its flowers contain a lot different chemical compounds, mainly flavonoids. From red petals of the flowers a flavonol glucoside was isolated and characterized by TLC, UV, IR, HPLC-MS/MS and NMR spectroscopy. Structure analyses of that chemical component revealed that It have the identical glucoside moiety attached to a flavonol skeleton like gossypitrin (gossypetin-7-O--glucoside) but in different position for which the structure of gossypetin-3’-O-glucoside was deduced from HSQC, HMBC, COSY and NOESY correlations.
Źródło:
World News of Natural Sciences; 2019, 24; 100-116
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania właściwości antyutleniających ekstraktu z zielonej herbaty
Study of antioxidant properties of green tea extract
Autorzy:
Sikora, E.
Ogonowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1286603.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
antyutleniacze
flawonoidy
zielona herbata
antioxidants
flavonoids
green tea
Opis:
W pracy badano właściwości przeciwutleniające ekstraktów z zielonej herbaty. Badano wpływ zastosowanego do ekstrakcji rozpuszczalnika oraz sposób ekstrakcji na efektywność działania antyutleniającego ekstraktów. Otrzymano trzy rodzaje ekstraktów z zielonej herbaty: alkoholowy, glikolowy oraz wodny. Zastosowano dwa typy ekstrakcji: ciągłą (w aparacie Soxhleta) oraz okresową (maceracja). Otrzymane preparaty poddano badaniu UV-Vis w celu oznaczenia zawartości rutyny. Na podstawie pomiaru metodą UV-Vis, intensywności barwy kompleksów rodankowych w roztworach zawierających kwas linolowy, tlenek żelaza II oraz ekstrakty z zielonej herbaty, badano właściwości przeciwutleniające sporządzonych wyciągów. Otrzymane wyniki wykazały, że najlepszymi zdolnościami antyoksydacyjnymi charakteryzował się, otrzymany metodą ciągłą, ekstrakt alkoholowy, a najsłabszymi ekstrakt wodny.
The aim of this work was the study of antioxidant properties of green tea extracts. Effect of kind of the solvent (ethyl alcohol, propylene glycol and water) and types of extraction (extraction in Soxlet apparatus and maceration) on the content of quercetin-3-rutinoside and the antioxidant efficiency of the extracts were investigated using UV-vis spectroscopy. The antioxidant properties were determinate on the basis of measurements of the colour intensity of thiocyanate complex which were formed in the mixture of linolic acid, FeCl2 and the extracts. The obtained results showed that alcoholic extract has the highest rutine concentration and exhibited the highest antioxidant properties.
Źródło:
Chemik; 2011, 65, 10; 968-973
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical Constituents from the Roots of Furcraea bedinghausii Koch
Autorzy:
Teponno, R.B
Ponou, B.K.
Fiorini, D
Barboni, L
Tapondjou, L.A
Powiązania:
https://bibliotekanauki.pl/articles/411609.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Furcraea bedinghausii
Agavaceae
flavonoids
phenolic compounds
Steroidal saponins
Chemotaxonomy
Opis:
Phytochemical investigation of the roots of Furcraea bedinghausii Koch. Led to the isolation of a mixture of two new homoisoflavones, 5,7-dihydroxy-3-(3,4-methylenedioxybenzyl)-chromone (4a) and 5,7-dihydroxy-3-(4-methoxybenzyl)-chromone (4b), together with the known β-sitosterol (1), 7,4'-dihydroxyhomoisoflavane (2), dihydrobonducellin (3), kaempferol (5), 5,7-dihydroxy-3-(4-hydroxybenzyl)-chromone (6), 1-linoleylglycerol (7), 6’-linoleyl-3-O-β-D-glucopyranosyl-β-sitosterol (8), trans-3,3’,5,5’-tetrahydroxy-4’-methoxystilbene (9), yuccaol C (10), yuccaol D (11), 3-O- β -D-glucopyranosyl- β -sitosterol (12), 4-[6-O-(4-hydroxy-3,5-dimethoxybenzoyl)-β-D-glucopyranosyloxy]-3-methoxybenzoic acid (13) and two pairs of steroidal saponins: (25R)-2α-3β–dihydroxy-5α-spirostan-12-one 3-O-β-D-glucopyranosyl-(1→2)-O-[β-D-xylopyranosyl-(1→3)]-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (14a) and (25R)-2α-3β–dihydroxy-5α-spirost-9-en-12-one 3-O-β-D-glucopyranosyl-(1→2)-O-[β-D-xylopyranosyl-(1→3)]-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (14b), (25R)-3β–hydroxy-5α-spirostan-12-one 3-O-β-D-glucopyranosyl-(1→2)-O-[β-D-xylopyranosyl-(1→3)]-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (15a) and (25R)-3β–hydroxy-5α-spirost-9-en-12-one 3-O-β-D-glucopyranosyl-(1→2)-O-[β-D-xylopyranosyl-(1→3)]-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (15b). Their structures were elucidated by interpretation of spectral data and by comparison with literature.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 11; 9-19
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antioxidant activity of rye bread enriched with milled buckwheat groats fractions
Autorzy:
Zmijewski, M.
Sokol-Letowska, A.
Pejcz, E.
Orzel, D.
Powiązania:
https://bibliotekanauki.pl/articles/876671.pdf
Data publikacji:
2015
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
antioxidant activity
rye bread
buckwheat
flavonoids
rutin
quercetin
polyphenol
Opis:
Background. Buckwheat, despite its broad nutritional benefits, is still not widely appreciated grain. It contains a protein with preferred amino acid composition and it is a valuable source of micronutrients and vitamins of the B group and vitamin E. Moreover, buckwheat groats have a high amount of polyphenols, including flavonoids and flavones. Eating rye bread is beneficial due to its high content of dietary fiber, phenolic acids and characteristic taste and aroma. Therefore, the use of rye flour and buckwheat mill products for bread may allow obtaining a product of high nutritional value and flavor. Objective. The aim of the study was to evaluate the influence of buckwheat products addition and baking process on the antioxidant properties of rye-buckwheat blends and breads. Material and methods. Experimental material was rye flour type 580 and buckwheat flour, wholegrain flour and bran obtained by grinding buckwheat groats. Buckwheat products share was 20 and 35%. The control was the rye flour. In the rye-buckwheat blends and bread loaves, the contents of selected flavonoids by HPLC method, total polyphenols content by Folin-Ciocalteu method and the antioxidant activity by the DPPH˙ radical scavenging method were determined. Results. Buckwheat bran was significantly richer in total polyphenols, rutin, quercetin, orientin and isoorientin than other buckwheat products and rye flour. Bread after baking contained similar amount of total polyphenols and quercetin and have a comparable ability to scavenge 1,1diphenyl-2-picrylhydrazyl radicals (DPPH˙) than the corresponding blends. Baking process negatively affected the amount of rutin, orientin and isoorientin. Conclusions. The use of buckwheat bran as a replacement for wheat flour in bread significantly increases its nutritional value. The process of baking unequally affects the content of particular groups of antioxidant compounds.
Wprowadzenie. Gryka mimo swoich wszechstronnych właściwości prozdrowotnych, nie jest jeszcze wystarczająco docenionym zbożem. Zawiera ona między innymi białko o bardzo korzystnym składzie aminokwasowym, jest również cennym źródłem mikroelementów i witamin z grupy B oraz witaminy E. Ponadto orzeszki gryczane wyróżniają się dużą ilością polifenoli, wśród nich flawonoidów i flawonów. Spożywanie pieczywa żytniego jest natomiast korzystne ze względu na wysoką zawartość w nim błonnika pokarmowego i kwasów fenolowych oraz charakterystyczny smak i aromat. Dlatego też wykorzystanie do wypieku pieczywa zarówno z mąki żytniej, jak i produktów przemiału gryki może pozwolić uzyskać produkt o wysokiej wartości smakowej i odżywczej. Cel badań. Celem badań była ocena wpływu dodatków gryczanych i procesu wypieku na wartość prozdrowotną mieszanek i pieczywa żytnio-gryczanego. Materiał i metody. Materiał badawczy stanowiła mąka żytnia typ 580 oraz mąka, śruta i otręby gryczane, które otrzymano w wyniku przemiału kaszy gryczanej nieprażonej. Produkty gryczane dodawano do mąki żytniej w ilości 20 i 35%. Próbę kontrolną stanowiła mąka żytnia typ 580. W mieszankach żytnio-gryczanych i wypieczonym z nich pieczywie oznaczono zawartość wybranych flawonoidów metodą HPLC, polifenoli ogółem metodą Folina-Ciocalteu, oraz oznaczono aktywność przeciwutleniającą z wykorzystaniem rodników 1,1difenyl-2-pikrylohydrazylowych (DPPH). Wyniki. Wykazano, że otręby gryczane były znacznie bogatsze w polifenole ogółem, rutynę, kwercetynę, orientynę i izoorientynę niż inne produkty gryczane i mąka żytnia. Po obróbce cieplnej, jaką jest wypiek, chleb zawierał więcej polifenoli ogółem i kwercetyny oraz miał większą siłę gaszenia rodników DPPH niż mieszanki, z których go wypieczono. Proces wypieku niekorzystnie wpływał na ilość rutyny, orientyny i izoorientyny. Wnioski. Zastosowanie otrąb gryczanych, jako zamiennika mąki żytniej w pieczywie znacznie zwiększa jego walory żywieniowe. Proces wypieku wpływa niejednakowo na zawartość poszczególnych grup związków przeciwutleniających.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2015, 66, 2
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Induction of phytochelatins and flavonoids in cadmium polluted Berberis thunbergii
Autorzy:
Chadzinikolau, Tamara
Kozłowska, Monika
Mleczek, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/957022.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
heavy metals
barberry
phytochelatin synthase
phytochelatins
flavonoids
chloroplast pigments
Opis:
Cadmium tolerance has been widely studied in various plant species. The study was undertaken to assess the response of Berberis thunbergii, commonly growing under urban conditions, to increasing concentrations of cadmium (1, 4 and 16 mg of Cd kg–1 soil). Experiments were conducted from June to August in a greenhouse. Accumulation of cadmium ions in barberry leaves was observed, at a simultaneous occurrence of mechanisms reducing its harmful effects by an increased synthesis of phytochelatins (PCs). Generation of PCs – putative heavy metal chelators was related to the phytochelatin synthase activity (PCS) and the level of metal accumulation. Increased contents of anthocyanins and flavonols in cadmium polluted barberry, considering that it is a coloured-leaf plant seems important in aspect of their multifunctional role in plant-environment interactions. Besides the capacity to chelate heavy metals, flavonoids are antioxidants and efficiently scavenge free radicals. Moreover, the content of chloroplast pigments was determined, but the changes were non-significant.
Źródło:
Dendrobiology; 2017, 77; 139-146
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of health-related properties of selected tree-nuts - a review
Autorzy:
Król, Katarzyna
Ponder, Alicja
Kopczyńska, Klaudia
Misztal, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/1065264.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
fatty acid composition
flavonoids
nuts
phenolic acid
tree nut
Opis:
As interest in the health effects of tree-nuts consumption has increased. Nuts are vary used in food industry, especially in confectionery industry, in milk products, chocolate products and ice cream. This nuts are also added to products dedicated for healthy breakfast like muesli, cereals, breads and salads. The consumption of nuts is frequently associated with reduction in risk factors for diabetes, cancer, cardiovascular diseases. Despite high fat and caloric content, several studies have reported beneficial effects after nut consumption, due to fatty acid profiles, sterols, proteins, fibers, vitamins, minerals, tocopherols, flavonoids and phenolic acid with potential antioxidant and anti-inflammatory properties. Daily intake up to 30-40 g per day of nuts are recommended. This review highlights the composition of eight nut varieties (walnuts, almonds, hazelnuts, cashews, pistachios, Brazilian nuts, pecan nuts, macadamia nuts) on the context of human health.
Źródło:
World Scientific News; 2019, 135; 116-128
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protective effects of quercetin on cadmium fluoride induced oxidative stress at different intervals of time in mouse liver
Autorzy:
Zargar, Seema
Siddiqi, Nikhat
Al Daihan, Sooad
Wani, Tanveer
Powiązania:
https://bibliotekanauki.pl/articles/1039092.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cadmium fluoride
quercetin
oxidative stress
flavonoids
histology
adverse effect
Opis:
Quercetin, a member of the flavonoid family is a major antioxidant acquired in humans by food consumption, while Cadmium fluoride (CdF2) is one of the naturally occurring chemicals having adverse effects. The protective effect of quercetin on time dependent oxidative damage induced in mice liver by CdF2 was studied in the following groups of mice consisting of six mice each: (i) control group; (ii) mice treated with single i.p injection of 2 mg/kg bw CdF2 for 24 h; (iii) mice treated with single i.p injection of 2 mg/kg bw CdF2 for 48 h; (iv) mice treated with single i.p injection of quercetin (100 mg/kg bw); (v) mice treated with i.p injection of 100 mg/kg bw of quercetin followed by i.p injection of CdF2 (2 mg/kg bw) for 24 h; and (vi) mice treated with i.p injection of 100mg/kg bw of quercetin followed by CdF2 (2 mg/kg bw) for 48 h. Administration of quercetin two hours before CdF2 significantly reduced the biochemical alterations in reduced glutathione, ascorbic acid, lipid peroxidation, super oxide dismutase, catalase and total protein (p<0.05). Histopathology also showed the protective effect of quercetin. The livers treated with CdF2 were atrophic, markedly nodular, inflamed and necrotic. However, this effect was reduced to a minimum in the mice pre-treated for two hours with quercetin.
Źródło:
Acta Biochimica Polonica; 2015, 62, 2; 207-213
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review of selected natural phytochemicals in preventing and treating malignant skin neoplasms
Autorzy:
Fruman-Toczek, Dominika
Zagórska-Dziok, Martyna
Dudra-Jastrzębska, Monika
Kruszewski, Marcin
Kapka-Skrzypczak, Lucyna
Powiązania:
https://bibliotekanauki.pl/articles/972368.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Tematy:
nonmelanoma skin cancer
malignant melanoma
phytochemicals
carotenoids
terpenoids
flavonoids
Opis:
Malignant skin neoplasms are one of the most common human malignancies. The incidence of nonmelanoma skin cancers and malignant melanoma is constantly increasing. The current therapies, especially for malignant melanoma, have relatively low success rates. Therefore, there is an urgent need to develop new remedies that are both safe and effective. Natural substances have always been an important source for the discovery of new therapies. In turn, a number of studies have indicated that some phytocheicals could have an anti-tumour effect. In vitro and in vivo testing of malignant skin neoplasm models revealed different anti-tumour actions, including antioxidation, carcinogen inactivation, anti-proliferation, cell cycle arrest, induction of apoptosis, inhibition of angiogenesis, or a combination of them. The aim of this paper is to describe anti-tumour compounds derived from natural sources that might be used in the therapy of malignant skin neoplasm. The phytochemicals discussed below include carotenoids, terpenoids and flavonoids.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2016, 10, 2; 127-130
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The antimicrobial activity of Prunella vulgaris extracts
Działanie antybakteryjne wyciągów z Prunella vulgaris
Autorzy:
Mahboubi, M.
Mahboubi, A.
Kazempour, N.
Powiązania:
https://bibliotekanauki.pl/articles/71327.pdf
Data publikacji:
2015
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
Prunella vulgaris
Labiatae
antimicrobial activity
plant extract
phenolics
flavonoids
Opis:
Prunella vulgaris ( Labiatae family) or self-heal is traditionally used for different ailments such as eye pain and inflammation, headache, dizziness, sore throat and wound healing. Total phenolic and total flavonoid contents of extracts (methanol, ethanol and aqueous) were determined by a spectrophotometer. The antimicrobial activity was evaluated by micro broth dilution assay. The total phenolic content of P. vulgaris extracts were higher in aqueous extract (156.5 mg GAC/g) followed by ethanol extract and methanol extract. The TFC content of P. vulgaris methanol extract (82.8 mg QE/g) was higher than ethanol extract (22.7 mg QE/g) and aqueous extract (16.2 mg QE/g). The antimicrobial activity of methanol or ethanol extracts was higher than aqueous extract from P. vulgaris. The sensitivity of microorganisms to different extracts is related to type of pathogens. There is no positive relation between total phenolic content and its antimicrobial activity. Prunella vulgaris ethanolic extract as a source of phenolic and flavonoid contents can be used as an antimicrobial agent
Prunella vulgaris (Labiatae), jest tradycyjnie używana w leczeniu różnych schorzeń, takich jak ból i zapalenie oka, ból głowy, zawroty głowy, ból gardła i leczenie ran. Całkowitą zawartość fenoli i flawonoidów w wyciągach (metanolowym, etanolowym i wodnym) określono za pomocą spektrofotometru. Działanie antybakteryjne oszacowano metodą micro broth dilution. Całkowita zawartość fenoli była najwyższa w wyciągu wodnym z P. vulgaris (156,5 mg GAC/g), następnie w wyciągu etanolowym i metanolowym. Zawartość TFC w wyciągu metanolowym z P. vulgaris (82,8 mg QE/g) była wyższa niż w wyciągu etanolowym (22,7 mg QE/g) i wodnym (16,2 mg QE/g). Działanie antybakteryjne wyciągu metanolowego lub etanolowego z P. vulgaris było silniejsze niż wyciągu wodnego. Wrażliwość mikroorganizmów na różne wyciągi zależy od typu patogenów. Nie ma pozytywnej zależności między całkowitą zawartością fenoli i działaniem antybakteryjnym. Wyciągi etanolowe z Prunella vulgaris mogą być uważane za źródło fenoli i flawonoidów i stosowane przeciwbakteryjnie.
Źródło:
Herba Polonica; 2015, 61, 1
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Induction of anthocyanins accumulation by methyl jasmonate in shoots of Crassula multicava Lam.
Indukcja akumulacji antocyjanow przez jasmonian metylu w pedach Crassula multicava Lam.
Autorzy:
Saniewski, M
Horbowicz, M.
Puchalski, J.
Powiązania:
https://bibliotekanauki.pl/articles/26831.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
accumulation
shoot
flavonoids
anthocyanin
Crassula multicava
methyl jasmonate
stem
Opis:
In Crassula multicava Lam. anthocyanins are formed naturally mostly in the stem near nodes and only traces in other parts of internodes. Methyl jasmonate (JA-Me) applied in lanolin paste at concentrations of 0.05, 0.1, 0.5 and 1.0% on the middle part of internodes greatly stimulated anthocyanins accumulation in the internodes and in the nodes of Crassula multicava. The stimulatory effect was higher in younger tissues of the Crassula multicava stem than in older ones, and depends on the used concentration of JA-Me. The possible role of jasmonates on anthocyanins formation in Crassula multicava is discussed.
W pędach Crassula multicavaLam. w naturalnych warunkach antocyjany two- rzą się głównie w łodydze w pobliżu węzłów i tylko śladowe ilości w innych czę- ściach międzywężli. Jasmonian metylu (JA-Me) podany w paście lanolinowej w stężeniach 0,05, 0,1, 0,5 i 1,0% w środku poszczególnych międzywężli silnie sty- mulował akumulację antocyjanów w miedzywężlach i węzłach Crassula multicava.Stymulacja ta była większa w młodszych, górnych tkankach pędu niż w starszych i zależna była od stężenia użytego JA-Me. Możliwa rola jasmonianów w akumulacji antocyjanów w pędach Crassula multicava jest dyskutowana.
Źródło:
Acta Agrobotanica; 2006, 59, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elicitation with Sodium Silicate and Iron Chelate Affects the Contents of Phenolic Compounds and Minerals in Buckwheat Sprouts
Autorzy:
Dębski, Henryk
Wiczkowski, Wiesław
Szawara-Nowak, Dorota
Horbowicz, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/1363275.pdf
Data publikacji:
2021
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
Fagopyrum esculentum
common buckwheat
flavonoids
phenolic acids
iron
silicon
Opis:
The study concerned the effect of elicitors on the contents of free flavonoids and phenolic acids, as well as their esters and glycosides, and contents of minerals in 7-day sprouts of common buckwheat. An aqueous solution containing a mixture of sodium silicate and Fe-EDTA (SIL-Fe) was compared with the same concentration of sodium silicate alone (SIL) and water (control). Phenolic compounds were analysed using an HPLC–MS/MS apparatus equipped with an ion-trap mass spectrometer, and analyses were conducted by multiple reaction monitoring of selected negative ions. The contents of macro- and microelements in sprouts were determined by the ICP-AES method, after sample mineralization in a mixture of HNO3 and H2O2. The study showed that SIL-Fe influenced the accumulation of individual phenolics in buckwheat sprouts in different ways. Among the major flavonoids in the buckwheat sprouts treated with SIL-Fe, the content of free forms and esters of (‒)-epicatechin and glycosides of quercetin as well as the total content of flavonoids decreased. Elicitation of buckwheat sprouts with SIL and SIL-Fe reduced the contents of calcium, potassium, copper, and zinc; however, the SIL-Fe treatment caused a 5-fold increase in iron content and a 2-fold increase in silicon content. The ratio of total flavonoids to the iron content of SIL-Fe-treated sprouts was 11.5, which was substantially lower than in the control, where it reached 64. The results of this study indicate that it is possible to produce buckwheat sprouts with a high content of flavonoids and fortified with iron, which may increase the availability of this element.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2021, 71, 1; 21-28
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chromatographic and mass spectrometric analysis of secondary metabolites of Deschampsia antarctica from Galindez Island, Argentine Islands
Autorzy:
Ivannikov, Roman
Anishchenko, Viktor
Kuzema, Pavlo
Stavinskaya, Oksana
Laguta, Iryna
Poronnik, Oksana
Parnikoza, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/16538469.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
West Antarctic
antarctic hairgrass
polyphenolic antioxidants
flavonoids
luteolin derivatives
Opis:
The aim of this work was to study the polyphenolic composition of Deschampsia antarctica È. Desv. plants grown at natural conditions on different locations on the Galindez Island, Argentine Islands, the maritime Antarctic. The plants were collected during the summer season of the 26th Ukrainian Antarctic Expedition (2020–2022). The extracts of 21 plants were obtained and the composition of the extracts was analyzed by means of high-performance liquid chromatography and matrix-assisted laser desorption/ionization mass spectrometry. The antioxidant properties of the extracts were characterized using the DPPH (2,2-diphenyl-1-picrylhydrazyl) test. The extracts were found to contain large amount of polyphenolic compounds, with flavonoids and phenolic acids, as well as their derivatives, being the most common classes of the phenols. Using the HPLC data the content of various phenols in the plants was systematic studied. It has been found that in all plants the most abundant phenols are flavonoids/flavonoid derivatives (on average about 75% of total mass of phenols). Among the flavonoids, luteolin derivatives predominate (86–94% of the total mass of flavonoids), and, among luteolin derivatives, the main compounds are orientin, orientin 2"- O-β-arabinopyranoside and isoswertiajaponin 2"- O-β-arabinopyranoside (67–83% of the total mass of luteolin derivatives). It has been also found that all the extracts possess the high activity in inhibition of DPPH radicals and that the antioxidant activity of the extracts correlates with total content of phenols in the samples. Thus, Deschampsia antarctica É. Desv. plants are a valuable source of natural phenolic antioxidants, and the most common antioxidants in the extracts are orientin, orientin 2"- O-β-arabinopyranoside and isoswertiajaponin 2"- O-β-arabinopyranoside.
Źródło:
Polish Polar Research; 2022, 43, 4; 341-362
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural products in dentistry
Surowce naturalne w stomatologii
Autorzy:
Pytko-Polonczyk, Jolanta
Muszyńska, Bożena
Powiązania:
https://bibliotekanauki.pl/articles/1033719.pdf
Data publikacji:
2016
Wydawca:
Zakład Opieki Zdrowotnej Ośrodek Umea Shinoda-Kuracejo
Tematy:
"ether oils"
"eugenol"
"flavonoids"
"natural products in dentistry"
"zinc"
Opis:
Modern medicine used many methods of treatment; one of them is phytotherapy. It is documented that plants can not only prevent many diseases, but also cure diseases. Main activities of plant materials used in dentistry are anti-inflammatory, antibacterial, antiviral, decongestant, adtringent, anti-bleeding and regenerating. The natural materials used in dentistry are mainly in the form of lotions, tinctures, infusions, toothpaste, drops and gels. The most important group of active compounds in dental formulations of natural origin include essential oils, monoterpenoides, phenolic compounds, gums, resins, tannins, flavonoids, anthocyanins, carotenoids, chlorophyll, vitamins, elements such as especially zinc and minerals such as AlK(SO4)2. It occurs naturally and is used for control of bleeding, and as an antiseptic. The ideal antimicrobial agent should be effective in removing bacteria responsible for the periodontal disease process; to have the widest possible range of action, does not cause side effects and have a prolonged activity in the oral cavity. Accordingly natural products particularly as essential oils and phenol compounds can, fulfill these tasks.
Źródło:
Medicina Internacia Revuo; 2016, 27, 107; 68-75
0465-5435
Pojawia się w:
Medicina Internacia Revuo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics of extraction of phenolic compounds and flavonoids from Carlina acaulis
Autorzy:
Fedoryshyn, Olha
Kniazieva, Kateryna
Mylyanych, Andriy
Petrinа, Romana
Powiązania:
https://bibliotekanauki.pl/articles/1833883.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
kinetics
mathematical processing
Carlina acaulis
extracts
phenolic compounds
flavonoids
Opis:
The study of the kinetics of extraction of phenolic compounds and flavonoids from crushed roots of Carlina acaulis using 40% and 70% of water-ethanol mixture by infusion method is described in the article. The total value of the mass transfer coefficient and the value of the transfer coefficient through the cell wall, in the intercellular space and the volume of the extractant were determined. Particles of Carlina acaulis roots of different sizes (0.2, 0.3, 0.5 mm) were studied; different concentrations of ethyl alcohol were used - 40% and 70%; the ratio of raw materials: extractant was 1:10. The analytical dependence of the mass transfer coefficient k and the leaching coefficient A on the solid particle size d and the concentration of the extractant was obtained, which allows to predict the extraction process and to design equipment for the technological process in production. Kinetic equations of the process of extraction of phenolic compounds and flavonoids from Carlina acaulis roots by infusion method are derived. The obtained equations allow to determine the concentrations of phenolic compounds and flavonoids in the extracts at a given point in time with a particle size of the solid phase from 1 to 10 mm, as well as to determine the optimal diameter of the solid phase particles for maximum extraction of the target substance.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2020, 9, 2; 3--10
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of flavonoids content on antioxidant activity of commercial cosmetic plant extracts
Wpływ zawartości flawonoidów na aktywność przeciwutleniającą handlowych kosmetycznych ekstraktów roślinnych
Autorzy:
Malinowska, P.
Powiązania:
https://bibliotekanauki.pl/articles/71500.pdf
Data publikacji:
2013
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
flavonoids content
antioxidant activity
commercial product
cosmetic
plant extract
Opis:
The aim of this work was to evaluate the antioxidant capacity and flavonoids content in 10 commercial cosmetic plant extracts used in cosmetics industry. Antioxidant activity of plant extracts were measured using two methods: FRAP (Ferric Reducing Antioxidant Power) and TEAC (Trolox Equivalent Antioxidant Capacity). The relationship between flavonoids content and antioxidant capacity of plant extracts were checked. As a result of this research it was found that FRAP and TEAC values of plant extracts significantly depend on the flavonoids content. The highest antioxidant activity, both in FRAP and TEAC assays, was observed for arnica flowers, hawthorn flowers and lungwort herb extracts. These extracts can be used as source of natural antioxidants for the prolongation of the oxidative stability of cosmetic products. Additionally, they can replace synthetic antioxidants.
Celem badań była ocena aktywności przeciwutleniającej i zawartości flawonoidów w 10 handlowych kosmetycznych ekstraktach roślinnych stosowanych w przemyśle kosmetycznym. Ich aktywność przeciwutleniającą zmierzono przy użyciu dwóch metod: Ferric Reducing Antioxidant Power (FRAP) i Trolox Equivalent Antioxidant Capacity (TEAC). Ponadto sprawdzono zależność między zawartością flawonoidów w ekstraktach roślinnych a ich aktywnością przeciwutleniającą. Stwierdzono, iż wartości wskaźników FRAP i TEAC wyznaczone dla ekstraktów roślinnych w sposób istotny zależą od zawartych w nich flawonoidów. Najwyższą aktywność przeciwutleniającą, zarówno w teście FRAP, jak i TEAC, zaobserwowano dla ekstraktu z arniki górskiej, głogu jednoszyjkowego i miodunki plamistej. Ekstrakty te mogą być użyte jako źródła naturalnych przeciwutleniaczy dla przedłużenia stabilności oksydacyjnej produktów kosmetycznych i ponadto mogą zastępować syntetyczne przeciwutleniacze.
Źródło:
Herba Polonica; 2013, 59, 3
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozmaryn - roślina bogata w związki biologicznie czynne
Rosemary - a plant rich in biologically active compounds
Autorzy:
Nowak, K.
Ogonowski, J.
Jaworska, M.
Powiązania:
https://bibliotekanauki.pl/articles/142533.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
olejek rozmarynowy
kwas rozmarynowy
flawonoidy
rosemary oil
rosmarinic acid
flavonoids
Opis:
W pracy przedstawiono charakterystykę związków biologicznie czynnych zawartych w rozmarynie (m.in. olejek rozmarynowy, flawonoidy, terpeny, kwasy fenolowe) oraz ich zastosowanie w przemyśle farmaceutycznym, kosmetycznym i spożywczym.
The aim of this study is to present the characteristics of biologically active compounds contained in the rosemary (such as rosemary oil, flavonoids, terpenes, phenolic acids) and their use in pharmaceutical, cosmetic and food industries.
Źródło:
Chemik; 2013, 67, 2; 133-135
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flavonoids intake among Polish and Spanish students
Autorzy:
Kozlowska, A.
Przekop, D.
Szostak-Wegierek, D.
Powiązania:
https://bibliotekanauki.pl/articles/874667.pdf
Data publikacji:
2015
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
flavonoids
intake
student
Polish student
Spanish student
consumption
human nutrition
Opis:
Background. Flavonoids are a group of bioactive compounds that are extensively found in foodstuffs of plant origin. Their regular consumption plays an important role in the prevention of degenerative diseases, particularly cardiovascular disease, and cancer. Objective. The purpose of the study was to estimate dietary flavonoid intake among Polish and Spanish students and to establish the main dietary sources of flavonoids. Material and Methods. This study included 91 Polish and 60 Spanish students. Dietary data were collected using a food frequency questionnaire. The dietary USDA Database for the flavonoid content of selected foods was used to calculate daily and weekly flavonoid intakes by the subjects. Results. The average flavonoid consumption in the Polish students was 801 mg/day, and in Spanish students 297 mg/day. Food categories such as beverages, vegetables and fruits were found to be significant sources of flavonoids, of which tea, oranges, orange juice, dried parsley and oregano were the main contributors among Polish students and oranges, tea, chickpeas, orange juice and dried parsley were the main sources of flavonoids among Spanish students. Conclusions. Flavonoid consumption in Polish students was more than two times higher than in Spanish students. Compared to other population studies consumption of flavonoids in both students groups was adequate.
Wprowadzenie. Flawonoidy to grupa antyoksydantów występująca powszechnie w roślinach. Substancje te wykazują wielokierunkowe działanie protekcyjne na organizm człowieka, budząc tym samym zainteresowanie naukowców, którzy w licznych pracach badają pobranie tych związków u ludzi. Cel . Celem badań była ocena spożycia wybranych flawonoidów spożywanych wraz z dietą przez polską i hiszpańską młodzież akademicką oraz wskazanie głównych źródeł tych substancji w diecie badanych. Materiał i Metody. W badaniach wzięło udział łącznie 151 osób: 91 Polaków oraz 60 Hiszpanów. Studenci zostali poproszeni o podanie tygodniowego spożycia produktów spożywczych będących istotnym źródłem flawonoidów. Spożycie tych związków obliczono na podstawie informacji zawartych w bazie danych opracowanej przez Departament Rolnictwa USA (USDA United States Department of Agriculture). Wyniki. Średnie spożycie flawonoidów przez polskich studentów wynosiło około 801 mg/dzień, podczas gdy wśród hiszpańskich studentów wyniosło około 297 mg/dzień. Napoje, warzywa, oraz owoce były głównymi grupami produktów dostarczających flawonoidów wśród badanych z obydwu grup. Najistotniejszym źródłem tych związków wśród polskich ankietowanych była czarna herbata, a wśród hiszpańskich pomarańcze. Wnioski. Analiza udzielonych odpowiedzi wykazała, że polscy studenci spożywali ponad dwukrotnie więcej flawonoidów niż hiszpańscy badani. Konsumpcja flawonoidów w obu grupach była zadowalająca, na tle danych z innych badań populacyjnych.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2015, 66, 4
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of glycosylated flavonoids extracted from sweet-cherry stems, as antibacterial agents against pathogenic Escherichia coli isolates
Autorzy:
Aires, Alfredo
Dias, Carla
Carvalho, Rosa
Saavedra, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1038644.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
flavonoids
agro-food wastes
enhanced extraction
antimicrobial agents
pathogenic bacteria
Opis:
The aim of this study was to evaluate the bioactivity of flavonoids extracted from sweet-cherry stems which are often used by a traditional system of medicine to treat gastro-intestinal and urinary tract infections but lacking any consistent scientific evidence; moreover the information about the class of phenolics, their content and the potential bioactivity of such material is very scarce. Thus, in this context, we have set a research study in which we evaluated the profile and content of phenolics extracted from sweet-cherry stems through a conventional (70ºC and 20 min) and ultrasound assisted extraction (40 kHz, room temperature and 20 min). The extracts were phytochemically characterized by using an HPLC-DAD-UV/VIS system and assayed by an in vitro minimum inhibitory concentration (MIC) bioassay against Escherichia coli isolates. Simultaneously, the total antioxidant activities were measured using the 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonate (ABTS•+) radical cation assay. Our results indicate that sweet-cherry stems have a high content of sakuranetin, ferulic acid, p-coumaric acid, p-coumaroylquinic acid, chlorogenic acid and its isomer neochlorogenic acid. Their average levels were highly affected by the extraction method used (p<0.001). The same trend was observed for total antioxidant activity and MIC values. The extracts produced with ultrasounds presented both, a higher total antioxidant activity and a lower minimum inhibitory concentration. Statistical analyses of our results showed a significant correlation (p<0.01) of total antioxidant activity and minimum inhibitory concentration with phenolics present in the extracts studied. Thus, we can conclude that cherry stems can be further exploited to purify compounds and produce coproducts with enhanced biologically added value for pharmaceutical industry.
Źródło:
Acta Biochimica Polonica; 2017, 64, 2; 265-271
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemia i farmacja bliżej natury, czyli jak przedłużyć życie w zdrowiu
Chemistry and pharmacy closer to nature. How to prolong health life with natural compounds?
Autorzy:
Wawer, I.
Powiązania:
https://bibliotekanauki.pl/articles/1221345.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
polifenole
flawonoidy
antyoksydanty
leki potencjalne
polyphenols
flavonoids
antioxidants
drug development
Opis:
Nowoczesna medycyna (personalna, żywieniowa) coraz bardziej zwraca uwagę na profilaktykę, na człowieka w środowisku, jego sposób życia i dietę. Zadaniem nauki jest troska o racjonalne wykorzystanie naturalnych zasobów. W świecie roślin znajdujemy mnóstwo związków cennych dla zdrowia, o właściwościach antyoksydacyjnych, są one nie tylko w roślinach leczniczych, ale też w jadalnych. Przemysł farmaceutyczny interesuje się związkami polifenolowymi, takimi jak flawonoidy czy kwasy hydroksycynamonowe. Mogą one stanowić wyjściowe struktury dla nowych leków przeciwzapalnych przeciwwirusowych, przeciwbakteryjnych czy przeciwnowotworowych. W artykule scharakteryzowano właściwości i potencjalne zastosowania takich związków, jak: resweratrol, kurkumina, oligomer proantocyjanidyny, galusan epigalokatechiny, kwas rozmarynowy i chlorogenowy, betainy i antocyjaniny, zachęcając do opracowania metod syntezy i poszukiwania bioaktywnych pochodnych.
Modern medicine (especially personalised and nutritional approach) focuses more attention on the diet, life style and the environment. Scientists have to examine more closely what we are eating, how diseases can be treated more rationally, and how we can more effectively use our natural resources. The pharmaceutical industry is searching for new medical plants, the functional compounds of which can serve as a starting point for the development of new drugs. Health-beneficial and life-prolonging effects of polyphenols are accompanied by the stimulation of various maintenance mechanisms, including protection against free-radical and oxidation-induced damage. These natural compounds are promising anti-inflammatory, antiviral, antibacterial and anticancer agents. The representatives of polyphenols: resveratrol, epigallocatechin-gallate, curcumin, proanthocyanidin, chlorogenic acid and rosemarinic acid, betalain, anthocyans are characterised as potential candidates for drugs. This review provides some information and serves to encourage work (chemical synthesis) in the field of flavonoids.
Źródło:
Chemik; 2010, 64, 4; 219-227
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of traffic pollution on chemical composition of raw elderberry (sambucus nigra l.)
Wpływ zanieczyszczeń komunikacyjnych na skład chemiczny surowca bzu czarnego (Sambucus nigra L.)
Autorzy:
Kolodziej, B.
Maksymiec, N.
Drozdzal, K.
Antonkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1188052.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
elderberry
Sambucus nigra
traffic pollution
content of flavonoids
macroand micronutrients
Opis:
Celem badań było określenie wpływu zanieczyszczeń komunikacyjnych na skład chemiczny kwiatów i owoców bzu czarnego. Surowce pozyskano z 16. stanowisk naturalnych w południowo-wschodniej części Polski. Stanowiska znajdowały się w różnym oddaleniu od ciągów komunikacyjnych o zróżnicowanym natężeniu ruchu drogowego. Surowiec zbierano od czerwca (kwiat) do sierpnia (owoc) 2009 r. i natychmiast po zbiorze suszono w temp. 30°C. Zawartość flawonoidów (w przeliczeniu na kwercetynę) oznaczono spektrofotometrycznie wg Farmakopei Polskiej VIII (2008), a wybranych składników mineralnych - włącznie z metalami ciężkimi (Cr, Zn, Pb, Cu, Cd, Ni, Fe i Mn) - po mineralizacji materiału roślinnego na sucho metodą IPC. Bliska odległość od ciągów komunikacyjnych oraz większa intensywność ruchu drogowego wpłynęły w istotny sposób na skład chemiczny surowca bzu czarnego, który zawierał mniej flawonoidów w stosunku do surowców pozyskiwanych z terenów bardziej odległych. W doświadczeniu stwierdzono istotną zależność między zawartością Cr, Fe, Cd i Cu w owocu bzu czarnego oraz Fe, Zn, Cu, Cr, Cd, Pb i Mg w kwiecie bzu czarnego a miejscem ich pozyskiwania. Bliskość ciągów komunikacyjnych i większa intensywność ruchu drogowego znacznie przyczyniły się do zwiększenia zawartości tych pierwiastków w analizowanym surowcu. Na skład chemiczny obydwu przebadanych rodzajów surowca bzu czarnego istotny wpływ ma miejsce ich pozyskiwania ze stanu naturalnego.
Źródło:
Journal of Elementology; 2012, 17, 1; 67-78
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical diversity of silverweed (Potentilla anserina L.) growing at the edges of arable fields.
Autorzy:
Angielczyk, Mirosław
Bączek, Katarzyna
Geszprych, Anna
Przybył, Jarosław L.
Węglarz, Zenon
Powiązania:
https://bibliotekanauki.pl/articles/2199570.pdf
Data publikacji:
2010-06-01
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
catechins
flavonoids
phenolic acids
populations
secondary metabolites
silverweed herb
tannins
Opis:
The medicinal usage of silverweed herb (Anserinae herba) is primarily related to the presence of phenolic compounds. Three populations of silverweed (Potentilla anserina L.) occurring at the edges of arable fields in Podlasie area (north-eastern Poland) were compared in respect of the content and composition of phenolics. Herb collected from the investigated populations differed in the content of determined compounds. The tannin content was very low (0.81-0.91%). The total flavonoid content ranged from 0.48 to 0.60%. Phenolic acid content was much higher (1.38-2.26%). Three flavan-3-ols: (+)-catechin, (-)-epicatechin, and (-)-epigallocatechin, four flavonol glycosides: rutoside, quercetin-3-O-glucoside, isorhamnetin-3-O-glucoside, and kaempferol-3-O-glucoside, as well as one phenolic acid (ellagic acid) were identified as a_result of HPLC analysis of methanolic extracts from the investigated raw materials. The most considerable differences between populations concerned the content of (+)-catechin (87.0-199.3 mg × 100 g-1), (-)-epigallocatechin (141.9-290.6 mg × 100 g-1), and rutoside (192.3-386.0 mg × 100 g-1) in herb...
Źródło:
Plant Breeding and Seed Science; 2010, 61; 41-46
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hypolipidemic action of rutin on triton WR-1339-induced hyperlipidemia in rats
Autorzy:
Livingston Raja, N.R.
Nair, A.R.
Senthilpandian, S.
Ravi, V.
Powiązania:
https://bibliotekanauki.pl/articles/2098294.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
rutin
flavonoids
triglyceride
atorvastatin
Triton WR-1339
hyperlipidemia
cholesterol
rat
Opis:
Introduction and objective. Hyperlipidemia is considered as a serious communal problem in developed countries, caused by an excess level of cholesterol in blood circulation. It leads to chronic illness and even death in human beings. As the currently available drugs cause unexpected side-effect, the aim of this study is to concentrate on naturally occurring flavonoids which can potentially provide defensive and therapeutic effects in atherosclerosis diseases, and investigate the hypolipidemic effect of rutin on Triton WR-1339 triggered hyperlipidemia in a rat blood sample. Materials and method. Rats were randomly prearranged into five different groups of five rats each. Group-I was the non-disease control and administered normal saline. Group-II was the atherogenic control, administered Triton WR 1339 (200 mg/kg BW). Group-III was standard and received Atorvastatin. The last two groups (IV, V) were tested (I&II) by administering administered Rutin (40 mg/kg, 80 mg/kg) orally. The test material (I&II) and the standard drug were administered for seven days. After the last dose, blood samples were collected and the lipid levels estimated in the blood samples. Results. Rats treated with rutin flavonoid at a dose of 40 mg/kg & 80mg/kg exhibited a reduction in Total Cholesterol, Triglycerides, Low Density Lipoprotein (LDL) and Very Low Density Lipoprotein (VLDL). Rutin also increases the High Density Lipoprotein (HDL), compared with control rats. Rutin treated rats exhibited dose-dependent hypolipidemic activity. The protection percentage of rutin against hyperlipidemia was observed as 41.89%, 55.57% whereas the atorvastatin treated group protection was observed at 60.63%. Conclusions. The results of the study revealed that rutin showed a significant hypolipidemic effectiveness on Triton WR- 1339 induced hyperlipidemia in rats.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2021, 15, 2; 51-55
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rutyna : budowa, właściwości
Rutin : structure and properities
Autorzy:
Samaszko-Fiertek, J.
Roguszczak, P.
Dmochowska, B.
Ślusarz, R.
Madaj, J.
Powiązania:
https://bibliotekanauki.pl/articles/171497.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
flawonoidy
rutyna
budowa
właściwości antyoksydacyjne
flavonoids
rutin
structure
antioxidant properties
Opis:
Flavonoids commonly can be found in plants. They protect them against various microorganisms or insects [1]. Flavonoids demonstrate not only antioxidant properties, but also prevent the development of cancer [2]. This is attributed to their ability to induce apoptosis of tumor cells. The structure of this type of compound is based mainly on the flavone skeleton with the keto group in position 4 (Fig. 2). The difference in structure of flavonoids consists mainly in the number and nature of the substituents. Flavonoid compounds have a 15-carbon atoms skeleton, consisting of two aromatic rings (A and B) connected to 3 carbon atoms, by oxygen contained within the heterocyclic ring C (Fig. 2) [5]. Structural difference of the pyranose ring C and position of the phenyl ring B are the basis for the division flavonoids into seven groups (Fig. 3) [6]. In recent years a number of work focused on the study of flavonoids complexes with ions of copper(II) or iron(II) were published [20–22]. One of the most important flavonoids is rutoside, which has a number of important biological activities. One of the most important function of this compound is inhibition hyaluronidase activity by reducing the permeation and improveing the flexibility of blood vessels. It is used to treat diseases such as diabetic retinopathy, inflammation of the mucous membranes of the nose, atherosclerotic diseases or disorders of the venous circulation. Rutoside forms a relatively stable complex with ions of iron(II) or calcium(II) as well as nickel(II) and especially with copper(II). This type of complex protect from rapid degradation/oxidation of L-ascorbic acid [14, 15]. In 2011, Sak-Bosnar and colleagues proposed the structure of rutoside complex with ions of copper (II) (Fig. 9) [20]. In the same year was published work suggesting that a key role in this type of mechanism play hydroxyl group at the 3 ‚carbon atom, which becomes a „carrier” of the electron/radical (Fig. 5) [19].
Źródło:
Wiadomości Chemiczne; 2016, 70, 7-8; 435-453
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenolic Contents and Antioxidant Activity of Extracts of Selected Fresh and Dried Herbal Materials
Autorzy:
Kozłowska, Mariola
Ścibisz, Iwona
Przybył, Jarosław
Ziarno, Małgorzata
Żbikowska, Anna
Majewska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1363258.pdf
Data publikacji:
2021
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
coriander
lovage
tarragon
Indian borage
total phenolics
phenolic acids
flavonoids
Opis:
Total phenolic content (TPC) and phenolic profiles of extracts of the aerial parts of coriander (Coriandrum sativum L.), lovage (Levisticum officinale Koch.), and tarragon (Artemisia dracunculus L.), and leaves of Indian borage (Plectranthus amboinicus) have been investigated. The extracts were prepared using 70% (v/v) ethanol and fresh or air-dried herbal material. Besides phenolic composition, DPPH• and ABTS•+ scavenging activity, and ferric-reducing antioxidant power (FRAP) were determined. The extracts from dried herbal materials exhibited higher TPC and more potent antioxidant activity than those from fresh counterparts. The highest TPC (146.77 g GAE/kg extract) and antioxidant activity (0.491, 0.643, and 0.396 mol TE/kg extract in DPPH, ABTS, and FRAP assays, respectively) were detected for the extract from dried leaves of Indian borage, while the lowest values were determined for the extract from fresh aerial parts of coriander. Five phenolic acids (rosmarinic, chlorogenic, caffeic, ferulic, and neochlorogenic acids) and four flavonoids ((+)-catechin, rutin, hyperoside, and astragalin) were identified in the samples. Only caffeic acid was present in all extracts. Its content in the extracts of dried tarragon and Indian borage was lower than in those of the fresh material. A significant correlation was found between antioxidant activity and the content of phenolic acids. Rutin was found to be the major flavonoid in most extracts. Based on the present study results, the possibility of using the extracts obtained from both fresh and air-dried herbs as potential components for functional food formulation can be considered in the future.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2021, 71, 3; 269-278
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antioxidant properties of Chamisso arnica (Arnica chamissonis Less.) water infusions
Właściwości antyoksydacyjne ekstraktów wodnych arniki łąkowej (Arnica chamissonis Less.)
Autorzy:
Olesińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/13097442.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Chamisso arnica
Arnica chamissonis
plant extract
flavonoids
polyphenol
antioxidant property
Źródło:
Agronomy Science; 2020, 75, 2; 85-94
2544-4476
2544-798X
Pojawia się w:
Agronomy Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Flavonoids Content in Alfalfa
Analiza zawartości flawonoidów w lucernie
Autorzy:
Goławska, S.
Łukasik, I.
Kapusta, T.
Janda, B.
Powiązania:
https://bibliotekanauki.pl/articles/389243.pdf
Data publikacji:
2010
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
Medicago sativa
flawonoid
owady rośliożerne
Acyrthosiphon pisum
flavonoids
herbivore
Acyrthosiphon pisitm
Opis:
Flavonoid glycosides constitute important group of plant secondary metabolites. This class of natural products play significant role in different physiological processes. Liquid chromatography (HPLC) was used to determine the flavonoid profiles and their concentration in aerial parts of three alfalfa (Medicago sativa L.) cultivars. It was shown that flavonoids of alfalfa are glycosides of four flavone aglycones: apigenin, luteolin, tricin and chrysoeriol. Ali flavonoid glycosides possesed glucuronid acid in sugar chain. Some of them were acylated with ferulic, coumaric or sinapic acids. It was shown that dominant flavonoids of alfalfa were the flavones: tricin and apigenin glycosides (65-72 % of total). The concentration of luteolin and chrysoeriol glycosides did not exceed 30 % of the total. The dominant flavonoid in Radius and Sapko cultivars was glucoside of tricin, in Sitel cultivar glycoside of apigenin. Thus, tricin and apigenin glycosides were the major flavones found in alfalfa aerial parts.
Wobec doniesień literaturowych ukazujących różne aspekty interakcji roślina-owad celowe wydaje się poszukiwanie roślinnych substancji chemicznych biorących udział w obronie roślin przed negatywnym wpływem biotycznych czynników środowiskowych. Przykładowo, flawonoidy oddziałują jako deterenty pokarmowe, inhibitory trawienia, a także bezpośrednie toksykanty w stosunku do owadów. Lucerna z uwagi na bogactwo struktur flawonów jest dobrym modelem do prowadzenia prac związanych z tym zagadnieniem. Wiedza na temat występowania flawonoidów w lucernie siewnej, będącej jedną z głównych roślin pastewnych, nie jest pełna, dlatego celem przeprowadzonych badań było zidentyfikowanie i porównanie zawartości flawonoidów w powszechnie użytkowanych odmianach lucerny siewnej (Medicago saliva L.). Badaniom poddano trzy odmiany lucerny: Radius, Sapko i Sitel. Ekstarkcję flawonoidów przeprowadzono z 6-miesięcznych roślin za pomocą metanolu. Rozdział i identyfikację flawonoidów wykonano metodą wysokosprawnej chromatografii cieczowej (HPLC) sprzężonej ze spektrometrią mas. Stwierdzono, że flawonoidy badanych odmian lucerny to glikozydy czterech aglikonów flawonów: apigeniny, luteoliny, trycyny i chryzoeriolu. W łańcuchu cukrowym wszystkich glikozydów występował kwas glukuronowy, a niektóre z nich były acylowane kwasem ferulowym, kumarowym bądź synapinowym. Wykazano, że dominującymi związkami były pochodne trycyny i apigeniny. Łączna zawartość glikozydów apigeniny i trycyny wahała się w granicach 65 do 72 % sumy flawonów badanych lucern. Zawartość glikozydów luteoliny i chryzoeriolu nie przekraczała 30 % sumy flawonów. Dla odmian Radius i Sapko związkiem dominującym był glikozyd trycyny, którego maksymalne stężenie (2.49 mg/ g s.m.) odnotowano w tkankach odmiany Radius. W przypadku odmiany Sitel w największych ilościach występował glikozyd apigeniny (1.31 mg/ g s.m.).
Źródło:
Ecological Chemistry and Engineering. A; 2010, 17, 2-3; 261-267
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nasiona lnu - naturalne źródło zdrowia i urody
Linseed - a natural source of health and beauty
Autorzy:
Bartkowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/1216667.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
nasiona lnu
len
omega-3
flawonoidy
fitoestogeny
linseed
flax
flavonoids
fitoestogens
Opis:
Od zawsze polski len znany był w świecie. Lniane prześcieradła, pięknie, ręcznie haftowane obrusy i serwety miały duży popyt. Na takie rękodzieła zawsze byli amatorzy. Po II wojnie światowej istniały duże zakłady obróbki lnu. W ostatnim 20-leciu zakłady lniarskie sprzedano. Tymczasem len nadal powinien być naszym narodowym bogactwem. Pozyskiwanie drogocennych składników z lnu zwyczajnego sięga czasów Orientu. Coraz częściej i chętniej spożywamy i dodajemy do wielu produktów spożywczych różne formy nasion lnu, który nadal imponuje swoim korzystnym wpływem na organizm. Nasiona lnu, zwyczajowo zwane siemieniem lnianym, mają także wysoką wartość odżywczą. W swoim składzie zwierają duże ilości cennych składników.
Polish flax has always been known in the world. Linen bed sheets, tablecloths beautifully embroidered by hand enjoyed big demand. There have always been connoisseurs of such craftwork. After the Second World War there were large linen processing plants. In the last twenty years the flax plants were sold, although fax should still be our national wealth. Extraction of precious ingredients from common flax dates back to the Oriental times. More and more often and gladly we consume and add to many food products various forms of linseed, as the fax still impresses us with its beneficial impact on human body. The seeds of linum, commonly known as linseed, have also high nutritional value. They have in their composition big amounts of precious ingredients.
Źródło:
Chemik; 2013, 67, 3; 186-191
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Four-Week Intake of Blackthorn Flower Extract on Mice Tissue Antioxidant Status and Phenolic Content
Autorzy:
Balta, Vedran
Đikić, Domagoj
Crnić, Irena
Odeh, Dyna
Orsolic, Nada
Kmetič, Ivana
Murati, Teuta
Dragović Uzelac, Verica
Landeka Jurčević, Irena
Powiązania:
https://bibliotekanauki.pl/articles/1363304.pdf
Data publikacji:
2021
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
pharmacokinetic
flavan-3-ol
flavonoids
bioavailability
phenolic compounds
Prunus spinosa L
Opis:
The study examined the antioxidative physiological effects of phenolics from an ethanol-water extract of blackthorn flowers orally administrated to C57/BL6 mice for 28 days in daily doses of 25 mg of total phenolics/kg body weight. Contents of phenolics in the intestine, liver, and kidneys collected after 1, 7, 14, 21, and 28 days of extract administration were analyzed by UPLC-MS/MS method. In the same tissues, the antioxidative properties were determined as ferric reducing antioxidant power (FRAP), ABTS•+ scavenging activity, content of reduced glutathione (GSH), and activity of superoxide dismutase (SOD) and catalase (CAT). The lipid peroxidation in tissues was also evaluated by thiobarbituric acid reactive substances (TBARS) assay. The exposed mice (compared to the control ones) had a lower content of TBARS in all tissues mostly on the third/fourth week of daily consumption. SOD activity and GSH content increased on the 28th day in tissues. CAT activity was higher only in the liver after one week of consumption but remained unchanged in other organs throughout the experiment. Phenolic profiles were different in individual tissues. The most prominent increases compared to the control were determined for contents of 3-O-feruloylquinic acid, 4-O-p-coumaroylqiunic acid, kaempferol pentoside, and quercetin rhamnoside in the intestine; for ferulic acid and quercetin 3-O-rutinoside in the liver; and for quercetin 3-O-rutinoside, ferulic acid, and 4-O-p-coumaroylquinic acid in the kidneys. The screened phenolics with different distribution in tissues could be responsible for slight differences in the recorded antioxidative effects.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2020, 70, 4; 361-375
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical composition and antioxidant activity of extracts from Moroccan fresh fava beans pods (Vicia Faba L.).
Autorzy:
Kalili, A.
Ouafi, R.E.
Aboukhalaf, A.
Naciri, K.
Tbatou, M.
Essaih, S.
Belahyan, A.
Belahsen, R.
Powiązania:
https://bibliotekanauki.pl/articles/2082861.pdf
Data publikacji:
2021
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
Vicia faba
chemical composition
antioxidant activity
total phenolics
flavonoids
mineral analysis
Opis:
Background. In Morocco, fava beans are widely used as a main meal or as an ingredient in various traditional recipes, in the form of fresh ripe seeds or dry seeds. In the past, the tender skin of bean pods was also used in certain specific dishes, thus diversifying the diet. However, the peels of the tender bean pods are currently less or not used and considered waste. In Moroccan, fava bean pods peels, traditionally used in food in the past, are today considered as waste. The valorization of fresh fava bean pods could revitalize the use of the specific dishes and diversify the diet. For this reason, the research aimed to assess the nutritional values and biological compounds of the whole fresh fava bean pods (Vicia faba L.). Objective. Evaluate the content of nutrients, total phenolic, flavonoids and tannin contents and antioxidant activity in different extracts of the tender pods of the fava bean (Vicia faba L.). Material and methods. The proximate composition and minerals were determined using AOAC methods. The total phenolic compounds by the Folin-Ciocalteu reagent, the total flavonoids were analyzed using aluminum chloride colorimetric method, the tannins by method of vanillin in an acidic medium and the antioxidant activity was evaluated by DPPH method. Results. The results show that the fresh fava bean pods have a moisture content of 87.31 ± 0.25%, ash 4.67 ± 1.03, and protein 29.11 ± 3.20 g/100 g. The legume samples also contain potassium (1946.8±4.61), phosphorus (483.8 ± 3.14), and calcium (399.6 ±2.25) mg/100 g of dry matter representing at last 40-50% of the RDI. The content of the different extracts of (Vicia faba L) varied from 49.5 to 594.4 mg GAE/ g for the total phenols, from 0.7 mg to 3.4 mg QE/g for flavonoids, and from 4.9 mg to 73.91 mg TAE/g dry weight for tannins. The evaluation of the antioxidant activity in the various extracts revealed a better activity in the methanolic extract (IC50=491.2 μg/mL) compared to others extracts: the MeOH/water extract (IC50=606.61 μg/mL), DCM/ MeOH extract (IC50 = 642.67 μg/mL) and DCM extract below of 50%. Conclusions. This study shows that fava bean pods, traditionally used in food, are rich in macro and micronutrients and bioactive substances, which demonstrates their potential contribution to human food and nutritional security.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2022, 73, 1; 79-86
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł

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