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    Wyświetlanie 1-3 z 3
    Tytuł:
    Production stages, microbiological risk and benefits on health of herbal teas
    Autorzy:
    Akduman, G.
    Korkmaz, I.O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049211.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    herbal tea
    production stage
    health
    contamination
    antioxidant activity
    microbiological risk
    benefit
    herbata ziołowa
    zdrowie
    zanieczyszczenie
    działanie antyoksydacyjne
    Opis:
    Plants have been used to prepare herbal infusions for centuries. Production of herbal tea consists of several steps, beginning with harvesting, cleaning form residues, drying, storage of herb in a suitable material, grinding, and blending. Te plants grow in different regions and climatic conditions, varying by their physical properties. They are consumed for different purposes and due to their chemical constituents. Many of them have therapeutic effects. Besides their various benefits and even antimicrobial effects, they also carry some microorganisms. Thus, the botanical characteristics and effects on the health of frequently consumed herbal teas and recommendations on their consumption with considered microbial risks are reviewed in this article.
    Źródło:
    Herba Polonica; 2020, 66, 4; 68-78
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of different drying processes on an antioxidant potential of three species of the Lamiaceae family
    Autorzy:
    Kwaśniewska-Karolak, I.
    Mostowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049315.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    drying process
    herb
    thyme
    Thymus vulgaris
    sage
    Salvia officinalis
    rosemary
    Rosmarinus officinalis
    antioxidant potential
    Lamiaceae
    spice plant
    ascorbic acid
    suszenie
    zioła
    działanie antyoksydacyjne
    kwas askorbinowy
    chlorofil
    Opis:
    Introduction: Spice plants are a rich source of biologically active compounds. Processes of drying, limits the development of microorganisms and biochemical reactions in raw herbs, at the same time modifies their chemical composition. Objective: The aim of this work was to evaluate the effect of drying process of selected plants on their antioxidant potential and the content of biologically active compounds. Methods: The herbal materials thyme herb (Thymus vulgaris L.), sage leaves (Salvia officinalis L.) and rosemary leaves (Rosmarinus officinalis) were dried using two methods: convective (at 30° C), and freeze-drying. In both, fresh and subjected to drying processes herbs, changes in total polyphenol and antioxidant potential (with the DPPH radical), vitamin C (in the form of ascorbic acid) and chlorophyll pigments contents, were studied. Results: The highest content of polyphenols and vitamin C was recorded in rosemary, while sage was characterized by the highest content of chlorophylls. It was found that the drying processes caused large losses of vitamin C (ascorbic acid) and dyes in comparison to the fresh material. The highest losses of vitamin C occurred in convection dried sage (95%), while most was preserved in lyophilised thyme (losses 74%). Drying had also influenced the reduction of the content of chlorophylls with the largest loss of these compounds, at 94% observed in the freeze-dried rosemary. However, the content of polyphenols increased, underscoring a large impact on the antioxidant activity of herbs. Conclusions: Drying processes resulted in the release of phenolic compounds, so their content increased three to four times in the case of rosemary and sage. The largest increase was observed in the case of lyophilised thyme. Simultaneously, the antioxidant potential was significantly increased. Herbal droughts proved to be a rich source of antioxidant compounds with promising applications as a food additive.
    Źródło:
    Herba Polonica; 2021, 67, 1; 8-17
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composition, antioxidant and antimicrobial activities of cold-pressed and distilled essential oils of Origanum onites L. and Lavandula officinalis L. relationships evaluated by SEM microscopy
    Autorzy:
    Erturk, O.
    Aydin, G.
    Ayvaz, M.C.
    Baskan, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049191.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    Origanum onites
    Lavandula angustifolia
    essential oil
    antioxidant activity
    antimicrobial activity
    morphological change
    scanning electron microscopy
    chemical component
    gas chromatography-mass spectrometry
    oregano
    lawenda
    olejek eteryczny
    działanie antyoksydacyjne
    analiza GC-MS
    działanie przeciwdrobnoustrojowe
    Opis:
    Introduction: In order to prevent increased bacterial resistance, it is important to use herbal medicines with less side effects. Objective: In this study, the chemical composition, antimicrobial, antioxidant activities and SEM images of Lavandula officinalis and Origanum onites oils obtained in two different ways were determined. Methods: The antimicrobial activity of the oils was determined against reference and multiple strains of foodborne and pathogenic bacteria. The each essential oil sample were analyzed by GC–MS. Antioxidant activities of the samples were examined through DPPH• and ABTS•+ radical scavenging and FRAP assays. Results: The results indicate that the oils of obtained from Origanum onites and Lavandula officinalis exhibited relatively strong antibacterial and antifungal activity. In addition, the antioxidant activities detected were remarkable. Morphological changes in bacterial cells treated with essential oil samples were demonstrated with SEM images. In addition, the chemical components of the oil samples obtained by both water steam and cold press were revealed by GC-MS analysis and compared. Conclusion: When all the obtained results are evaluated together; these plants could be suitable for using as antimicrobial and antioxidative agents in several industries such as food, cosmetic, etc.
    Źródło:
    Herba Polonica; 2020, 66, 4; 43-54
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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