| Beide Seiten der vorigen RevisionVorhergehende ÜberarbeitungNächste Überarbeitung | Vorhergehende Überarbeitung |
| hibiscus_sabdariffa_l [2025/11/22 23:55] – andreas | hibiscus_sabdariffa_l [2025/11/24 08:35] (aktuell) – andreas |
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| Erect annual herb, up to 2m tall, probably native to West Africa, cultivated and naturalized throughout tropics; stems robust, purplish; leaves dimorphic; blades on proximal part of stem ovate, those on distal part of stem palmately 3-lobed, lobes lanceolate; flowers solitary, axillary, calyx purplish, cup-shaped, corolla yellow with dark red center, 6-7cm in diameter. "The fleshy calyx and epicalyx are edible, both fresh as a vegetable and dried as a tea." [[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200013718]] | Erect annual herb, up to 2m tall, probably native to West Africa, cultivated and naturalized throughout tropics; stems robust, purplish; leaves dimorphic; blades on proximal part of stem ovate, those on distal part of stem palmately 3-lobed, lobes lanceolate; flowers solitary, axillary, calyx purplish, cup-shaped, corolla yellow with dark red center, 6-7cm in diameter. "The fleshy calyx and epicalyx are edible, both fresh as a vegetable and dried as a tea." [[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200013718]] |
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| | "Calyxes from the Roselle plant (Hibiscus sabdariffa L.) were used to prepare cold (22 °C for 4 h) and hot (98 °C for 16 min) infusions/teas from both fresh and dried forms. Aroma volatiles were extracted using static headspace SPME and analyzed using GC-MS and GC-O with 2 different columns (DB-5 and DB-Wax). Totals of 28, 25, 17, and 16 volatiles were identified using GC-MS in the dried hot extract (DHE), dried cold extract (DCE), fresh hot extract (FHE), and fresh cold extract (FCE) samples, respectively. In terms of total GC-MS peak areas DHE ≫ DCE > FHE ≫ FCE. Nonanal, decanal, octanal, and 1-octen-3-ol were among the major volatiles in all 4 beverage types. Thirteen volatiles were common to all 4 teas. Furfural and 5-methyl furfural were detected only in dried hibiscus beverages whereas linalool and 2-ethyl-1-hexanol were detected only in beverages from fresh hibiscus... The most intense aroma volatiles were 1-octen-3-one and nonanal with a group of 4 aldehydes and 3 ketones common to all samples." \\ |
| | [Ramírez‐Rodrigues, M. M., et al. "Hot and cold water infusion aroma profiles of Hibiscus sabdariffa: fresh compared with dried." Journal of food science 76.2 (2011): C212-C217] |
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| | {{:furfural.png|furfural}} furfural (R=H) and 5-methyl furfural (R=Me) |
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| | Main volatile components of dried calyx and epicalyx of Hibiscus flowers (headspace GC-MS) were furfural (31.6-38.6%) and cinnamal (13.8-14.1%). Olfactorly interesting minor components were e.g. benzaldehyde, benzoic acid, eugenol, 5-methylfurfural, and maltol (0.14-0.18%). \\ |
| | [Farag, Mohamed A., Dalia M. Rasheed, and Islam M. Kamal. "Volatiles and primary metabolites profiling in two Hibiscus sabdariffa (roselle) cultivars via headspace SPME-GC-MS and chemometrics." Food Research International 78 (2015): 327-335] |
| | [[https://scholar.cu.edu.eg/sites/default/files/mfarag73/files/1-farag_et_al._food_research_international_2015.pdf|PDF]] |
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| | "Furans were the most dominant volatiles in Hibiscus sabdariffa teas with the lead of furfural in general. Furfural was identified as the most dominant aroma-active compound (FD=2048-4096) responsible for caramel, bready odors in all samples. Another aroma-active compounds detected in roselle infusions with high intensities were 5-methyl-2-furfural (caramel), acetic acid (vinegary), 3-penten-2-ol (oily, herbal), nonanal (herbal, grassy), benzaldehyde (almond), eugenol (spicy) and 3-methyl-3-buten-2-one (fruity)." |
| | [Zannou, Oscar. "Characterization of aroma and aroma-active compounds of roselle (Hibiscus sabdariffa L.) teas obtained by three different infusions." (2017).] |
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| | Most important key odorants in cold and hot Beninese Roselle infusions (GC-MS-olfactometric analysis) were furfural (FD:4096, caramel, bready), 5-methyl-2-furfural (FD:1024, caramel), 3-penten-2-ol (FD:128, oily, herbal), and 3-methyl-3-buten-2-one (FD:128, fruity). \\ |
| | [Zannou, Oscar, Hasim Kelebek, and Serkan Selli. "Elucidation of key odorants in Beninese Roselle (Hibiscus sabdariffa L.) infusions prepared by hot and cold brewing." Food research international 133 (2020): 109133] \\ |
| | [Selli, S., et al. Chapter 10 "Aroma, Aroma-Active, and Phenolic Compounds of Roselle." in: Roselle. Academic Press, 2021. 143-164] |
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| "The major pigment, which was formerly isolated from the calyx and bract of roselle (Hibiscus sabdariffa L.) by Yamamoto et al. (1933), was reported to have the structure of delphinidin pentosido-glucoside. It was newly examined and found that it consists of each 1mol of delphinidin (1mol), glucose and xylose. By a series of analytical procedure its structure must be delphinidin 3-xylosido-glucoside. So it was compared with daphniphyllin (delphinidin 3-xylosido-glucoside), which was isolated from the berries of Daphniphyllum macropodum Miq. and it revealed their identity. Hence, the name “hiviscin”. once given to this substance, must be eliminated from the literature. | "The major pigment, which was formerly isolated from the calyx and bract of roselle (Hibiscus sabdariffa L.) by Yamamoto et al. (1933), was reported to have the structure of delphinidin pentosido-glucoside. It was newly examined and found that it consists of each 1mol of delphinidin (1mol), glucose and xylose. By a series of analytical procedure its structure must be delphinidin 3-xylosido-glucoside. So it was compared with daphniphyllin (delphinidin 3-xylosido-glucoside), which was isolated from the berries of Daphniphyllum macropodum Miq. and it revealed their identity. Hence, the name “hiviscin”. once given to this substance, must be eliminated from the literature. |
| "The anthocyanins delphinidin-3-O-sambubioside (1) and cyanidin-3-O-sambubioside (2) were isolated by bioassay-guided purification. These compounds showed IC50 values (84.5 and 68.4 μg/mL, respectively), which are similar to those obtained by related flavonoid glycosides. Kinetic determinations suggested that these compounds inhibit the enzyme activity by competing with the substrate for the active site... The competitive ACE inhibitor activity... is in good agreement with the folk medicinal use of Hibiscus sabdariffa calyces as antihypertensive." \\ | "The anthocyanins delphinidin-3-O-sambubioside (1) and cyanidin-3-O-sambubioside (2) were isolated by bioassay-guided purification. These compounds showed IC50 values (84.5 and 68.4 μg/mL, respectively), which are similar to those obtained by related flavonoid glycosides. Kinetic determinations suggested that these compounds inhibit the enzyme activity by competing with the substrate for the active site... The competitive ACE inhibitor activity... is in good agreement with the folk medicinal use of Hibiscus sabdariffa calyces as antihypertensive." \\ |
| [Inhibition of angiotensin convertin enzyme (ACE) activity by the anthocyanins delphinidin-and cyanidin-3-O-sambubiosides from Hibiscus sabdariffa., Ojeda, D., Jiménez-Ferrer, E., Zamilpa, A., Herrera-Arellano, A., Tortoriello, J., Alvarez, L., Journal of ethnopharmacology, Vol.127(1), 2010, 7-10] | [Inhibition of angiotensin convertin enzyme (ACE) activity by the anthocyanins delphinidin-and cyanidin-3-O-sambubiosides from Hibiscus sabdariffa., Ojeda, D., Jiménez-Ferrer, E., Zamilpa, A., Herrera-Arellano, A., Tortoriello, J., Alvarez, L., Journal of ethnopharmacology, Vol.127(1), 2010, 7-10] |
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| "Calyxes from the Roselle plant (Hibiscus sabdariffa L.) were used to prepare cold (22 °C for 4 h) and hot (98 °C for 16 min) infusions/teas from both fresh and dried forms. Aroma volatiles were extracted using static headspace SPME and analyzed using GC-MS and GC-O with 2 different columns (DB-5 and DB-Wax). Totals of 28, 25, 17, and 16 volatiles were identified using GC-MS in the dried hot extract (DHE), dried cold extract (DCE), fresh hot extract (FHE), and fresh cold extract (FCE) samples, respectively. In terms of total GC-MS peak areas DHE ≫ DCE > FHE ≫ FCE. Nonanal, decanal, octanal, and 1-octen-3-ol were among the major volatiles in all 4 beverage types. Thirteen volatiles were common to all 4 teas. Furfural and 5-methyl furfural were detected only in dried hibiscus beverages whereas linalool and 2-ethyl-1-hexanol were detected only in beverages from fresh hibiscus. In terms of aroma active volatiles, 17, 16, 13, and 10 aroma active volatiles were detected for DHE, DCE, FHE, and FCE samples, respectively. The most intense aroma volatiles were 1-octen-3-one and nonanal with a group of 4 aldehydes and 3 ketones common to all samples. Dried samples contained dramatically higher levels of lipid oxidation products such as hexanal, nonanal, and decanal. In fresh hibiscus extracts, linalool (floral, citrus) and octanal (lemon, citrus) were among the highest intensity aroma compounds but linalool was not detected in any of the dried hibiscus extracts." \\ | |
| [Hot and cold water infusion aroma profiles of Hibiscus sabdariffa: fresh compared with dried., Ramírez‐Rodrigues, M.M., Balaban, M.O., Marshall, M.R., Rouseff, R.L., Journal of food science, Vol.76(2), 2011, C212-C217] | |
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| "Hibiscus sabdariffa anthocyanin extract can act as a prophylactic by intervening as a free radical scavenger both in vitro and in vivo as well as inducing the phase II drug detoxification enzymes." \\ | "Hibiscus sabdariffa anthocyanin extract can act as a prophylactic by intervening as a free radical scavenger both in vitro and in vivo as well as inducing the phase II drug detoxification enzymes." \\ |
| [Da-Costa-Rocha, I., Bonnlaender, B., Sievers, H., Pischel, I., & Heinrich, M. (2014). Hibiscus sabdariffa L. - A phytochemical and pharmacological review. Food chemistry, Vol.165, 2014, 424-443] | [Da-Costa-Rocha, I., Bonnlaender, B., Sievers, H., Pischel, I., & Heinrich, M. (2014). Hibiscus sabdariffa L. - A phytochemical and pharmacological review. Food chemistry, Vol.165, 2014, 424-443] |
| [[http://www.sciencedirect.com/science/article/pii/S030881461400692X|PDF]] | [[http://www.sciencedirect.com/science/article/pii/S030881461400692X|PDF]] |
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| Main volatile components of H.sabdariffa (headspace GC-MS) were furfural (31.6-38.6%) and cinnamal (13.8-14.1%). Olfactorly interesting minor components were e.g. benzaldehyde, benzoic acid, eugenol, 5-methylfurfural, and maltol (0.14-0.18%). \\ | |
| [Farag, Mohamed A., Dalia M. Rasheed, and Islam M. Kamal. "Volatiles and primary metabolites profiling in two Hibiscus sabdariffa (roselle) cultivars via headspace SPME-GC-MS and chemometrics." Food Research International 78 (2015): 327-335] | |
| [[https://scholar.cu.edu.eg/sites/default/files/mfarag73/files/1-farag_et_al._food_research_international_2015.pdf|PDF]] | |
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| {{:hibiscus_sabdariffa.jpg?700}} \\ | {{:hibiscus_sabdariffa.jpg?700}} \\ |
