Composition of ginger (<i>Zingiber officinale</i> roscoe) volatile oils from Nigeria

Ekundayo, Olusegun; Laakso, Into; Hiltunen, R.

doi:10.1002/ffj.2730030207

Cited by 53 publications

(45 citation statements)

References 9 publications

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“…The contents of b-bisabolene, geraniol, eugenol, borneol, b-selinene, torreyol, a-selinene, a-copane, a-thujene, c-terpene and terpinen-4-ol were stable in the two oils, though they were present in small amounts (<1%). The occurrence of geranial and neral in appreciable quantities (>3.7%) in the two oils could be responsible for the lemon aroma (Ekundayo et al 1988).…”

Section: Discussionmentioning

confidence: 96%

Identification and comparison of the volatile constituents of fresh and dried leaves ofSpondias mombinfound in North-central Nigeria:in vitroevaluation of their cytotoxic and antioxidant activities

Oladimeji

Aliyu

Ogundajo

et al. 2016

Pharmaceutical Biology

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Context:Various studies have shown that the leaf extracts of Spondias mombin Linn (Anacardiaceae) possess pharmacological properties such as antioxidant and antiviral effects. However, no biological activity from its essential oil has been reported in literature. Objective: To analyse the chemical constituents, cytotoxic activity and antioxidant capability of the essential oils from fresh and dried leaves of S. mombin. Materials and methods: Hydrodistillation using Clevenger-type apparatus was employed to obtain the essential oil. Oil analysis was performed using an HP 6890 Gas Chromatograph coupled with an HP 5973 Mass Selective Detector. The cytotoxicity bioassay was carried out using the brine shrimp lethality test (10,000-0.01 lg/mL). Additionally, the reactive oxygen species scavenging potential of the two S. mombin oils (1000-200 lg/mL) were investigated using a hydroxyl radical scavenging and ferric iron reducing system. Results: Chemical analysis of essential oils from S. mombin revealed the presence of 41 compounds, with predominance of monoterpenoids, sesquiterpenoids and non-terpenoids derivatives. In both fractions, the principal component was b-caryophellene (27.9-30.9%), followed by c-cadinene (9.7-12.3%). There was an increase in the oxygenated monoterpenoid contents and a concomitant decrease in the amounts of sesquiterpenoids hydrocarbons observed on drying the leaves. The oil obtained from the fresh leaves was more active than that obtained from dried leaves, with LC 50 values (from the brine shrimp lethality assay) of 0.01 and 4.78 lg/mL, respectively. The two oils (from fresh and dried leaves) at 1.0 mg/mL scavenged hydroxyl radical by 83% and 99.8%, respectively. Moreover, they reduced ferric ion significantly and compared favourably with vitamin C. Conclusions: Essential oil derived from the leaves of S. mombin could hold promise for future application in the treatment of cancer-related diseases. ARTICLE HISTORY

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Section: Discussionmentioning

confidence: 96%

Identification and comparison of the volatile constituents of fresh and dried leaves ofSpondias mombinfound in North-central Nigeria:in vitroevaluation of their cytotoxic and antioxidant activities

Oladimeji

Aliyu

Ogundajo

et al. 2016

Pharmaceutical Biology

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“…However it has been observed that the quality of its dried ginger has been declining, due to low level of mechanization of ginger production and processing (Onu and Okafor, 2003), with attendant mould growth and loss of some important ginger qualities, as a result of which Nigerian ginger attracts the cheapest price in the world market (Ekundayo et. al., 1988).…”

Section: Gingermentioning

confidence: 99%

Comparative studies of sun and solar drying of peeled and unpeeled ginger

Eze¹,

Agbo²

2011

AJSIR

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Fresh ginger rhizomes were washed, sorted and cut into desired sizes using a knife. Some were peeled to remove the cork skin while others were left unpeeled with the cork skin. The samples were dried in a solar dryer and the open air for two weeks and designated; solar peeled and unpeeled, and open-air peeled and unpeeled Some physico-chemical and organoleptic analyses were carried out on the samples before, during and after drying. The results obtained showed that open-air dried products retained its colour and aroma more than the solar dried samples. Drying was faster with the solar dryer than with the open air method. While the Total variable count (TVC) on the dried ginger was reduced to 66.7% for peeled and 57.6% for unpeeled ginger in the samples subjected to open-air drying, it was reduced to only 47.6%for peeled and 9.63% for unpeeled with solar drying method. The moisture content of the solar dried unpeeled ginger was reduced to 7.0% which is within the standard of 6-9% acceptable to the international market unlike that of open air drying which could only attain about 17.0% moisture content in the study area. Although there was no defined trend in changes of crude protein content of samples with drying time, solar dried ginger appeared to contain less protein than air-dried ones.

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“…Ginger oils from Nigeria, 20 Fiji 21 and India 17Y19 have also been analysed, showing signi®cant dierences. These results suggest that the composition of ginger oils may be dependent on chemotaxonomic dierences between strains or on climatic and growing conditions.…”

Section: ±11mentioning

confidence: 99%

Chemical Composition and Analyses of Enantiomers of Essential Oils from Madagascar

et al. 1997

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The volatile constituents of twelve essential oils from Madagascar, namely those of Cinnamomum camphora (L.) Presl, Cinnamomum zeylanicum Blume (leaf oil), Hedychium¯avum Roxb., Helichrysum gymnocephalum Humbert, Helichrysum selaginifolium L., Lantana camara L., Pelargonium roseum Willd., Piper nigrum L., Ravensara aromatica Havozo (bark oil and leaf oil), Vetiveria zizanioides (L.) Nash ex Small and Zingiber ocinale Roscoe were identi®ed and quanti®ed by high resolution capillary gas chromatography coupled to mass spectrometry (HRGC±MS) and high resolution capillary gas chromatography (HRGC), respectively. In all the essential oils at least one of the ®ve chiral monoterpenes citronellol, limonene, linalol, terpinen-4-ol and a-terpineol was detected. Analysis of the enantiomers using multidimensional capillary gas chromatography (MDGC) revealed speci®c enantiomeric excesses, except for linalol, which was found in racemic form in P. roseum essential oil.

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Composition of ginger (Zingiber officinale roscoe) volatile oils from Nigeria

Cited by 53 publications

References 9 publications

Identification and comparison of the volatile constituents of fresh and dried leaves ofSpondias mombinfound in North-central Nigeria:in vitroevaluation of their cytotoxic and antioxidant activities

Identification and comparison of the volatile constituents of fresh and dried leaves ofSpondias mombinfound in North-central Nigeria:in vitroevaluation of their cytotoxic and antioxidant activities

Comparative studies of sun and solar drying of peeled and unpeeled ginger

Chemical Composition and Analyses of Enantiomers of Essential Oils from Madagascar

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