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Publications (18)
Abstract: Ackee seeds are a major waste of the ackee canning industry. The seeds bio-accumulate the toxin hypoglycin but are also a potential source of protein. The objective of this study was to produce a protein isolate from the ackee seed and determine the chemical and functional properties of the isolate. Proteins were extracted from the defatt...
Melicoccus bijugatus Jacq (Mb) has been reported to have cardiovascular modulatory effects. In this study, we evaluated the antihypertensive effects and mechanism of action of Mb on N G -Nitro- l -arginine Methyl Ester ( l -NAME) and Deoxycorticosterone Acetate (DOCA) rat models. Aqueous extract of Mb fruit (100 mg/kg) was administered for 6 weeks...
Seeds of the ackee fruit are high in starch content and are a major waste product of the ackee aril canning industry. The objective of this study was to investigate the physicochemical and functional properties of isolated ackee seed starch. De-hulled seeds were dried and milled into 'flour' which was defatted by Soxhlet extraction using petroleum...
Ackee canners often harvest mature fruits that are placed on sun racks to complete ripening (indicated by pod-opening). It is unknown whether the nutrient composition of rack-ripened fruits differs from those completely ripened on trees. This study compares proximate, mineral and fatty acid composition of raw, mature arils of tree-ripened and rack-...
Papaya, a nutritious tropical fruit, is consumed both in its fresh form and as a processed product worldwide. Major quality indices which include firmness, acidity, pH, colour and size, are cultivar dependent. Transgenic papayas engineered for resistance to Papaya ringspot virus were evaluated over the ripening period to address physicochemical qua...
Objective:
To re-investigate the composition of ackee oil and unequivocally determine its principal fatty acid components.
Methods:
Oil was extracted from the edible portion of ackees harvested in three different studies (I-III) by several analysts; studies I and II utilized composite samples from several trees while study III consisted of ackee...
Consumption of large amounts of hypoglycin A can lead to the sometimes fatal Jamaican Vomiting Sickness necessitating regulation of the residual hypoglycin levels in commercial ackee products. Factors contributing to elevated levels of hypoglycin A in the edible arilli of the tree ripened fruit are under investigation. The current study examined th...
Consumption of improperly ripened ackee ( Blighia sapida K.D. Koenig) often results in fatalities. The causal toxin, hypoglycin A, decreases in the edible arilli upon maturity; regulation of hypoglycin A in the arilli is thus critical. Hypoglycin B, also toxic, is confined to the seeds. Hypoglycins A and B were tracked in ackees grown in Jamaica ov...
http://www.globalsciencebooks.info/Online/GSBOnline/OnlineTPJ_4_SI1.html
The dipeptide hypoglycin B, one of two toxins of the ackee fruit (Blighia sapida Koenig), was characterized for the first time by NMR spectral data, which led to the discovery that it exists naturally as a pair of diastereomers. No distinction was observed in the (1)H NMR signals of the diastereomers; however, complete and distinct (13)C NMR assign...
BACKGROUND: Papaya ( Carica papaya L.) production is limited by over 20 viruses, the most damaging of which is papaya ringspot virus (PRSV). Owing to a lack of suitable PRSV‐resistant sources in Carica germplasm, transgenic resistance using the coat protein ( cp ) gene of a local PRSV strain is being developed to manage the disease in Jamaica. For...
Leaf oil from fruiting female and non-fruiting male Pimenta dioica (L.) Merr. trees, were analyzed by GC. Oil yields from male pimento trees (2.13%) were typically lower than that for female trees (2.67%). Non-fruiting and fruiting trees contained the same volatile components with different relative abundances. The composition of eugenol (p< 0.01),...
The biological activity against Boophilus microplus of extracts of the berries, bark, leaves and twigs of Pimenta dioica was examined and compared with that of eugenol, methyl eugenol and four commercial acaricides, namely dimethoate, farnesyl methyl ether, carbaryl and diazinon. The berry essential oil was more effective at inhibiting oviposition...
Fresh-cut products, also known as lightly or minimally processed products, are highly perishable because a large proportion of their surface area is without epidermis, the outer protective layer of tissue. Temperature, atmosphere, relative humidity and sanitation must be regulated to maintain quality of fresh-cuts. In the 0–10 °C range, Q10 of resp...
The biosynthesis of the capreomycidine moiety of the capreomycin antitubercular antibiotics has been studied in Streptomyces capreolus A250. Initial experiments with [1-C-14]arginine confirmed that this is the primary precursor. Subsequent incorporation of [2,3,3,5,5-H-2(5)]arginine afforded samples of capreomycins IA (1a) and IB (2a) that were ana...
Two new sesquiterpenoid metabolites have been characterized from a Jamaican variety of the marine alga Laurencia obtusa. These are 2-chloro-3-hydroxy-α-chamigren-9-one, with an unusual cis-relationship of the heteroatoms at the 2,3-positions, and its intramolecular conjugate addition derivative possessing a cineole moiety fused to a cyclohexane rin...
