Aqueous extracts of Hibiscus sabdariffa as antimicrobials in foods

نویسندگان

  • Kristen Liane Higginbotham
  • Svetlana Zivanovic
  • P. Michael Davidson
چکیده

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منابع مشابه

Antimicrobial activity of Hibiscus sabdariffa aqueous extracts against Escherichia coli O157:H7 and Staphylococcus aureus in a microbiological medium and milk of various fat concentrations.

Hibiscus sabdariffa L. calyces are widely used in the preparation of beverages. The calyces contain compounds that exhibit antimicrobial activity, yet little research has been conducted on their possible use in food systems as antimicrobials. Aqueous extracts prepared from the brand "Mi Costenita" were sterilized by membrane filtration (0.22-μm pore size) or autoclaving (121 °C, 30 min) and tes...

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Effects of Hibiscus Sabdariffa Calyx Extracts on 2,4-Dinitrophenylhydrazine-Induced Changes in the Activities of Antioxidant Enzymes in Rabbits

The effects of aqueous extract and anthocyanin-rich extract of the calyces of Hibiscus sabdariffa Linn on the 2,4-dinitrophenylhydrazine (DNPH)-induced changes in the levels of antioxidant enzymes of rabbits were evaluated in this study. The organs examined were the blood, brain and liver. Exposure of rabbits to DNPH (28 mg/kg body weight) caused significant (P<0.05) increase in catalase and su...

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Antioxidant and antihyperlipidemic activity of Hibiscus

Antioxidant and antihyperlipidemic activities of the extracts of leaves and calyces of Hibiscus sabdariffa were investigated by studying their in vitro inhibitory activity on lipid peroxidation and in vivo effects on cholesterol induced hyperlipidemia. Highest antioxidant activity was exhibited by ethanolic extract of calyces followed by ethanolic extract of leaves followed by aqueous extract o...

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Nootropic Activity of Calyces of Hibiscus Sabdariffa Linn

Nootropic acitivity of calyces of Hibiscus sabdariffa Linn. was studied in mice. Elevated plus maze and passive avoidance paradigm were employed to evaluate learning and memory parameters. Scopolamine (0.4 mg/kg, i.p.) was used to induce amnesia in mice. The aqueous extracts of calyces of Hibiscus sabdariffa (HS-100 and 200 mg/kg, p.o.) significantly attenuated amnestic deficits induced by scop...

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Toxic effects of oral administration of extracts of dried calyx of Hibiscus sabdariffa Linn. (Malvaceae).

The effects of a 90-day oral administration of water and alcohol extracts of dried calyx of Hibiscus sabdariffa were evaluated in albino rats. Haematological, biochemical and histopathological changes were monitored every 30 days.The death of the animals was preceded by a severe loss in weight, accompanied with diarrhoea in animals on the 2000 mg/kg dose. There was an increase in food intake (g...

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تاریخ انتشار 2016