La Côte-Saint-André, France
La Côte-Saint-André, France

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Amon A.S.,niversite dAbobo Adjame | Soro R.Y.,Luniversite Of Cocody Abidjan | Koffi P.K.B.,niversite dAbobo Adjame | Due E.A.,niversite dAbobo Adjame | Kouame L.P.,niversite dAbobo Adjame
Advance Journal of Food Science and Technology | Year: 2011

This study aimed at determining the chemical composition and physico-functional properties of flour from Ivorian taro (Colocasia esculenta, cv yatan) corm as affected by boiling time. The change in boiling time led to a significant (p<0.05) reduction in the iodine affinity of starch, total carbohydrate, total phenolic compound, reducing and total sugars contents, whereas the moisture content, water absorption capacity, water solubility index, paste clarity and foam capacity increased significantly (p<0.05). The crude fat, crude fibre, crude protein and total ash contents were not affected by the change in boiling time. The flour of Ivorian taro corm is a good source of carbohydrate, fiber and ash. It contained a fair amount of crude protein and showed a high water absorption capacity and iodine affinity of starch. Within this flour, calcium, iron, sodium, zinc and copper had the lowest values while phosphorus, potassium and magnesium had the highest values. Significant correlations were observed between such constituents and physico-functional properties as moisture and water solubility index; crude fat and iodine affinity starch; total carbohydrate and paste clarity; total phenolic compound and forming capacity. PCA showed that FRTC was located at the left of the score plot, while FBTC20, FBTC35 and FBTC50 had a positive score in the first principal component. © Maxwell Scientific Organization, 2011.


Zoue L.T.,Luniversite Of Cocody Abidjan | Bedikou M.E.,Luniversite Of Cocody Abidjan | Faulet B.M.,niversite dAbobo Adjame | Gonnety J.T.,niversite dAbobo Adjame | Niamke S.L.,Luniversite Of Cocody Abidjan
Food Science and Technology International | Year: 2013

The search for new sources of oil with improved characteristics has focused our attention on the characterisation of Irvingia gabonensis seed kernel oil. Physicochemical analysis have revealed the following assets: refractive index (1.42 ± 0.00), free fatty acids (2.3 ± 0.8%), peroxide value (3.33 ± 0.57 meq O2/kg), iodine value (32.43 ± 1.22 g I2/100 g), saponification value (233.75 ± 2.60 mg KOH/g), unsaponifiable matter (1.5 ± 0.02%), carotenoids (63 ± 0.01 mg β-carotene/100 g) and phospholipids (2.1 ± 0.01%). Absorbance of this oil decreased abruptly in the range of UV-B and UV-A wavelengths. Gas chromatography analysis showed that the major fatty acids were saturated, being mainly composed of lauric (C12:0, 39.35 ± 0.01%) and myristic acids (C14:0, 20.54 ± 0.01%). Nevertheless, an unusually high amount (6.44 ± 0.02%) of linolenic acid was also noted. Mass spectrometer analysis of volatile compounds highlighted the presence of various aromatic and aliphatic organic compounds. I. gabonensis seed kernel oil also showed oxidative stability at 60 C after 12 days of storage with maximum peroxide value of 34.66 meq O2/kg. In view of these interesting characteristics, I. gabonensis seed kernel could be used as an alternative source of oil for lipid industries. © SAGE Publications 2012 [br]Los Angeles, London, New Delhi and Singapore.


Zoue L.T.,Luniversite Of Cocody Abidjan | Bedikou M.E.,Luniversite Of Cocody Abidjan | Gonnety J.T.,niversite dAbobo Adjame | Faulet B.M.,niversite dAbobo Adjame | Niamke S.L.,Luniversite Of Cocody Abidjan
Tropical Journal of Pharmaceutical Research | Year: 2012

Purpose: To investigate the seed oils of Corchorus olitorius and Hibiscus sabdariffa for their antioxidant and antimicrobial potential. Methods: The physicochemical characteristics of oil of the plant seeds were determined using standard methods while their volatile compounds were analyzed by gas chromatography coupled with mass spectrometery (GC-MS). The antioxidant activity of these oils was determined using 2,2-Diphenyl-1- picrylhydrazyl (DPPH) free radical scavenging method, and their antimicrobial effect was determined by agar dilution method. Results: Phospholipids, carotenoids and phenols contents of the studied seed oils were approximately 2.0 %, 100 mg/100g and 6.7 mg/100g, respectively. GC-MS analysis of the volatile compounds showed the presence of various aromatic and aliphatic organic compounds while the antioxidant activity of the oils was in the range of 0 to 5 g/l, which was higher than that of ascorbic acid. The seed oils also showed antimicrobial activity against Staphylococcus aureus, Aspergillus fumigatus and Trichophyton mentagrophytes with minimal inhibitory concentrations (MIC) of 250.0 and 62.5 mg/ml for C. olitorius and H. sabdariffa seed oils, respectively. Conclusion: C. olitorius and H. sabdariffa seed oils showed pronounced antioxidant and antimicrobial activities. These characteristics should be exploited for possible applications in the food supplement, pharmaceutical and cosmetic industries. © Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, 300001 Nigeria.


Kouadio E.J.P.,niversite dAbobo Adjame | Due E.A.,niversite dAbobo Adjame | Dabonne S.,niversite dAbobo Adjame | Etchian O.A.,niversite dAbobo Adjame | Kouame L.P.,niversite dAbobo Adjame
International Journal of Tropical Insect Science | Year: 2010

The activity of a crude enzyme preparation extracted from hepatopancreas in the digestive tract of the giant cricket Brachytrupes membranaceus (Drury) was assayed for amylase and-glucosidase. Amylase-and-glucosidase-specific activities were estimated to be 3.31 and 13.02UI/mg, respectively. The zymogram analysis of the crude enzymatic extract showed the existence of two isoforms of amylase. For-glucosidase, the zymogram analysis showed one form only. Both the amylolytic activities exhibited optimum pH at 6.6 and 7.0, respectively, for amylase and-glucosidase. As for optimum temperature, values were estimated at 55 and 40C for amylase and-glucosidase activities, respectively. Amylase activity was found to be stable at pH 6.6-7.6 and temperatures up to 55C. The corresponding values for-glucosidase were pH 6-7 and up to 40C. Amylolytic enzymes of B. membranaceus were activated by Ca2+ and Ba2+ and inhibited by chemical agents such as ethylenediaminetetraacetic acid, 4-chloromercuribenzoic acid and dithionitrobenzoic acid. The analysis of hydrolytic products after soluble starch hydrolysis by the enzyme preparation from the digestive tract of B. membranaceus by thin layer chromatography revealed that glucose and maltose were the major products. The present study showed that these amylolytic enzymes play a fundamental role in energy production for this insect. Copyright © 2010 ICIPE.

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