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    Wyświetlanie 1-6 z 6
    Tytuł:
    Biological activities and chemical composition of solvent extracts of Stoechospermum marginatum (C. Agardh)
    Autorzy:
    Esmaeili, Akbar
    Khakpoor, Marjan
    Powiązania:
    https://bibliotekanauki.pl/articles/1039656.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    brown seaweed
    antibacterial activity
    Stoechospermum marginatum
    extract
    antioxidant activity
    Opis:
    The objective of this study was to evaluate the chemical composition CH3OH-CH2Cl2 (1:1) extract and biological activities of various extracts derived from the aerial parts of the brown marine alga Stoechospermum marginatum (C. Agardh). Gas chromatography (GC) and gas chromatography-mass spectroscopy (GC-MS) were used to analyze the composition of the essential oil. Total phenolics assay demonstrated a high value in hexane extract (HE), with a lower value for chloroform extract (CE), and the lowest value for methanol extract (ME). DPPH (2,2-diphenyl-1-picrylhydrazyl) assay showed that extracts of S. marginatum possess radical scavenging activity (RSA). Tests of the antioxidant property of the extracts revealed both electron and hydrogen transfer mechanisms. The antibacterial activity of the ME, CE, and HE as well as an ethanol extract was estimated against seven Gram-positive and Gram-negative bacteria. The ethanol extract showed the highest antibacterial activity, and the HE showed the lowest.
    Źródło:
    Acta Biochimica Polonica; 2012, 59, 4; 581-585
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antibacterial, antifungal, anti-oxidant, anti-inflammatory and anti-hypertensive activities of N-chloropyrazinamide
    Autorzy:
    Vaijayanthi, S. P.
    Mathiyalagan, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/412474.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    antibacterial activity
    antifungal activity
    antioxidant activity
    anti-inflammatory
    anti-hypertensive activity
    N-chloropyrazinamide
    Opis:
    N-chloropyrazinamide was prepared by the chlorination of pyrazinamide using trichloroisocyanuric acid. The experimental results ascertained that the tested N-chloropyrazinamide showed good antimicrobial activities when compared to standard drug. It was found that N-chloropyrazinamide at different concentrations exhibited significant dose dependent anti-oxidant, anti-inflammatory and anti-hypertensive activity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 7; 1-8
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    GC-MS Analysis and Biological activity of Essential Oil of Fruits, Needles and Bark of Pinus pinea grown wildly in Jordan
    Autorzy:
    Halloum, Baha
    Shakya, Ashok K.
    Elagbar, Zaha A.
    Naik, Rajashri R.
    Powiązania:
    https://bibliotekanauki.pl/articles/895316.pdf
    Data publikacji:
    2019-10-30
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    antibacterial activity
    essential oils
    antioxidant activity
    DPPH radical scavenging activity
    β-carotene bleaching assay
    Pinus pinea
    Opis:
    Essential oils from needles, fruits and bark was extracted from Pinus pinea L. (stone pine) grown wildly in Jordan. The chemical composition, antibacterial activity, antioxidant activity of essential oils was evaluated. The chemical compositions were identified using Gas-Chromatography-Mass spectrometry (GC-MS) and retention Indices (Van den Dool & Kratz). The results show that the essential oil obtained from needles composed mainly of Guaiol (12.7%), limonene (11.42%), and β-caryophyllene (7.61%), while fruit contains limonene (32.56%), and α-pinene (6.78%). The essential oils from barks were rich in β-caryophyllene (16.51%), limonene (14.83%), caryophyllene oxide (11.83%), and longifolene (7.51%). In vitro, antibacterial activity of the essential oil samples was evaluated using agar-well diffusion method against three different strains of bacteria (Gram¬-positive bacteria: Staphylococcus aureus and Gram-negative bacteria: Klebsiella pneumoniae and Escherichia coli). The results showed that essential oil showed appreciable antibacterial activity against S. aureus. The essential oil from fruit exhibited weak antibacterial activity against E. coli and K. pneumoniae. Essential oils of P. pinea showed appreciable antioxidant activity in-vitro.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 5; 825-831
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pharmacological and insect antifeedant activities of some 3-(2,4-dichloro-5-fluorophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamides
    Autorzy:
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412405.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Halo aryl 4,5-dihydro-1H-pyrazole-1-carbothioamides
    antibacterial activity
    antifungal activity
    antioxidant activity
    insect antifeedant activity
    Opis:
    A series containing twelve titled compounds were synthesized by solvent-free method and their purities were examined by literature procedure. These compounds were subjected to study the pharmacological effects such as antibacterial, antifungal and antioxidant activities and the insect antifeedant activities using Bauer-Kirby disc diffusion method with their bacterial and fungal strains, DPPH radical scavenging and leaf disc bio-assay method with 4th instar larvae Achoea janata L.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 18; 47-56
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, Characterization, In-Vitro Antimicrobial Evaluation and Antioxidant Studies of Some Isoxazoline Derivatives
    Autorzy:
    Vishnupriya, P.
    Rubala mary, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1112444.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chalcone
    antibacterial
    antifungal
    antioxidant activity
    isoxazole
    synthesis
    Opis:
    The tremendous rise in development of resistance to antimicrobials has created an alarming situation for researchers and clinicians. In this regard, an attempt has been made to develop a series of azole-based derivatives. The presented study consists of the design and synthesis of some newer derivatives by incorporating the isoxazole nucleus in the pharmacophore. These are also characterized physicochemically and by spectral means (IR and microanalysis). Moreover, the antioxidant activity of these derivatives was assessed using DPPH radical scavenging methods Finally, all of the newly isolated compounds were tested for their antimicrobial activities. Herein, antimicrobial screening using the agar disc diffusion method revealed that the majority of the derivatives are most active.
    Źródło:
    World News of Natural Sciences; 2018, 18, 2; 72-78
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phytochemical characterisation and bioactive properties of Solanum sodomaeum L. fruits at two stages of maturation
    Autorzy:
    Ouerghemmi, I.
    Farhat, M.B.
    Harbeoui, H.
    Hammami, M.
    Hamdaoui, G.
    Marzouk, B.
    Tounsi, M.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/71442.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    phytochemistry
    bioactive property
    antibacterial property
    antioxidant activity
    essential oil
    fatty acid
    Solanum sodomaeum
    fruit
    maturation
    Opis:
    Introduction: Solanum sodomaeum L. has been observed to have several medicinal properties, in particular, in the treatment of several types of human skin cancer. Objective: The influence of the maturation stage of S. sodomaeum fruits on the total lipid contents, fatty acid profiles, essential oil yields and compositions, as well as the antibacterial and antioxidant activities of the essential oils, was investigated. Methods: The fatty acid and essential oil constituents were identified using gas chromatography (GC) and GC–mass spectrometry (GC–MS). The antioxidant properties of essential oil and vegetal oil were assessed using 1,1-diphenyl-2-picryl-hydrazyl (DPPH) scavenging and reducing power assays. The antibacterial ac-tivity of essential oil was tested using the disc diffusion assay for resistance in human pathogenic bacteria. Results: Mature fruits showed higher total lipid content (17%) and were characterised by polyunsaturated fatty acids (53.87%), represented mainly by linoleic acid (53.11%). Similar yields of essential oils were detected for immature (0.43%) and mature (0.45%) fruits. Tetrahydronaphthalene (41.79%) was detected as the major essential oil component at the immature stage versus dihydrocoumarin pentane (18.27%), hexadecanoic acid (17.43%) and 2-undecanone (13.20%) in mature fruits. The DPPH test showed that essential oils had better antioxidant properties; however, the vegetal oils showed better performance in the reducing power assay. Moreover, the essential oil of S. sodomaeum mature fruits was active against bacterial strains. Conclusions: S. sodomaeum fruits could be a valuable source of natural antioxidants and antibacterial agents.
    Źródło:
    Herba Polonica; 2018, 64, 3
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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