Optimization of Water Cooking of Sweet Potato (Ipomea batatas) Leaves and Characterization of Three Nutritional Interest Molecules (Folic Acid, Iron and Phytate)

Main Article Content

Désirée A. Gouekou
Serge S. Guédé
Edith A. Agbo
Albarin G. Gbogouri

Abstract

Sweet potato (Ipomea batatas) leaves are among the leafy vegetables most consumed by Ivorian population. In order to preserve iron and folic acid, and to eliminate phytates, a study of optimization of water cooking of these leaves was conducted. Response surface methodology was employed to describe the effects of cooking time and leaf quantity on iron, folic acid and phytate contents of sweet potato leaves using a central composite design. Response surfaces and isoresponse curves were plotted to visualize areas of interest (optimal points). Results showed that the experimental data were adequately fitted into the second-order polynomial model. Cooking time had significant effects (P < .05) on folic acid and phytate contents. The effect of leaf quantity was significant (P < .01) on the three response variables. In addition, the optimal points were located in areas of the experimental domain where iron and folic acid contents were high. Therefore, three optimal conditions for water cooking (cooking time, leaf quantity) were identified: (10 min, 400 g), (7.93 min, 300 g) and (22.07 min, 441.4 g). Under these conditions, iron and folic acid contents (mg/100 g) were: (49.17, 12.58), (37.00, 16.27) and (48.77, 11.26), respectively. These results could be exploited to formulate iron and folic acid supplementation products from sweet potato leaves.

Keywords:
Sweet potato leaves, water cooking, optimization, folic acid

Article Details

How to Cite
Gouekou, D. A., S. Guédé, S., A. Agbo, E., & G. Gbogouri, A. (2019). Optimization of Water Cooking of Sweet Potato (Ipomea batatas) Leaves and Characterization of Three Nutritional Interest Molecules (Folic Acid, Iron and Phytate). European Journal of Nutrition & Food Safety, 10(4), 242-252. https://doi.org/10.9734/ejnfs/2019/v10i430118
Section
Original Research Article

References

Agbo E, Kouame C, Mahyao A, N’zi JC, Fondio L, Gnakri D. Consumption of indigenous leafy vegetables in urban and periurban areas: case of Abidjan in Côte d'Ivoire. Poster, indigeno veg policy dialogue workshop, university, South Africa. 2008;1.

Mbaeyi-Nwaoha IE, Emejulu VN. Evaluation of phytochemical composition and antimicrobial activity of sweet potato (Ipomoea batatas) Leaf. Pakistan Journal of Nutrition. 2013;12(6):575-586.

Zoro AF, Zoué LT, Bédikou ME, Kra SA, Niamké SL. Effect of cooking on nutritive and antioxidant characteristics of leafy vegetables consumed in Western Côte d’Ivoire. Archives of Applied Science Research. 2014;6(4):114-123.

Martinez E. Etude des mécanismes contribuant aux effets des variations de l’apport en précurseurs de méthyles sur le protéome cardiaque. Thèse de Doctorat, Médecine humaine et pathologie. Université d’Auvergne - Clermont-Ferrand I, France. 2012;291.
[Submitted on June 25, 2015]
Available: ttps://tel.archives-ouvertes.fr/tel-01168283/document

ANSES - Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail. Le fer : Fonctions, sources alimentaires, et besoins nutritionnels. ANSES. 2014;2.
[Updated on March 07, 2019]
Available:https://www.anses.fr/fr/content/le-fer

Rubaihayo EB. Indigenous vegetables of Uganda. African Crop Science Conference Proceedings. 1994;1:120-124.

Rocca-Poliméni R. Contribution à la compréhension de la cuisson domestique sous pression de vapeur. Étude expérimentale et modélisation des transferts, de l’évolution de la texture des légumes et du fonctionnement d’un autocuiseur. Thèse de Doctorat, Sciences de l’ingénieur [physics]. AgroParisTech, France. 2007;291.
[Submitted on 15 January 2009]
Available:https://pastel.archives-ouvertes.fr/pastel-00004560/file/2007AGPT0045.pdf

Vodouhe S, Dovoedo A, Anihouvi VB, Tossou RC, Soumanou MM. Influence du mode de cuisson sur la valeur nutritionnelle de Solanum macrocarpum, Amaranthus hybridus et Ocimum gratissimum, trois légumes feuilles traditionnels acclimatés au Bénin. Internationnal Journal of Biological and Chimical Sciences. French. 2012;6(5): 1926-1937.
Available:http://dx.doi.org/10.4314/ijbcs.v6i5.3

Box J, Wilson W. Central composites design. Journal of the Royal Statistics Society. 1951;13(1):1-35.

Nechar M, Molina MF, Cuadros Rodriguez L, Bosque-Sendra JM. The application of Doehlert designs in the optimization of experimental variables in solid phase spectrophotometry. Analytica Chimica Acta. 1995;316(2):185-193.
Avialble:https://doi.org/10.1016/0003-2670(95)00351-Y

Massart DL, Vandeginste BGM, Buydens LMC, de Jong S, Lewi PJ, Smeyers-Verbeke J, Mann CK. Handbook of chemometrics and qualimetrics: Part A. Applied Spectroscopy. 1998;52(8): 302A.

Montgomery DC. The 2k factorial design. In: Montgomery DC, editors. Design and analysis of experiments. 4th ed. New York, USA: John Wiley and Sons, Inc. 1997;290-353.

Neto BB, Scarminio IS, Bruns RE. Como Fazer Experimentos: Pesquisa e Desenvolvimento na Ciência e na Indústria. Editora da Unicamp, Sao Paulo, Brasil. Portuguese. 2001;83.

AOAC. Official methods of analysis 15th edition. Association of official analytical chemists, Washington, DC. 1990; 2044.

El-Gizawy SM, Ahmed AN, El-Rabbat NA. High-performance liquid chromatographie determination of multivitamin preparations using a chemically bonded cyclodextrin stationary phase. Analytical Letters. 1991; 24(7):1173-1181.
Available:https://doi.org/10.1080/00032719108052962

Latta M, Eskin M. A simple and rapid colorimetric method for phytate determination. Journal of Agricultural and Food Chemistry. 1980;28(6):1313-1315.
Available:https://doi.org/10.1021/jf60232a049

Ferreira SLC, dos Santos WNL, Quintella CM, Neto BB, Bosque-Sendra JM. Doehlert matrix: a chemometric tool for analytical chemistry—review. Talanta. 2004;63:1061–1067. Available: https://www.researchgate.net/profile/Juan_Bosque-Sendra/publication/ 23437174_Doehlert_matrix_A_chemometric_tool_for_analytical_chemistry_-_Review/links/5b9d4bf345851574f7ce36d3/Doehlert-matrix-A-chemometric-tool-for-analytical-chemistry-Review.pdf
Avaiable:https://doi.org/10.1016/j.talanta.2004.01.015

Statsoft. Statistica for Windows [7.1]. Computer Program. Tulsa, OK, (USA): StatSoft, Inc; 2005.

Diouf S, Folquet M, Mbofung K, Ndiaye O, Brou K, Dupont C, N’dri D, Vuillerod M, Azaïs-Braesco V, Tetanye E. Prévalence et déterminants de l’anémie chez le jeune enfant en Afrique francophone– Implication de la carence en fer. Archives de Pédiatrie. French. 2015;22(11):1188-1197.
Available:https://doi.org/10.1016/j.arcped.2015.08.015

WHO – Word Health Organization. Role of iron in human metabolic processes. 2004; 246-278.

Allen L, de Benoist B, Dary O, Hurrel R, editors. Directives sur l’enrichissement des aliments en micronutriments. OMS/FAO. 2011;412. Available: https://apps.who.int/iris/bitstream/handle/10665/44585/9789242594010_fre.pdf;jsessionid=7A1570DCF4A4A44D8ED31C8F2C14086D?sequence=1

Conseil Supérieur de la Santé. Recommandations nutritionnelles pour la Belgique. Bruxelles: CSS; 2009. Avis n°8309.

Thompson LU. Potential health benefits and problems associated with antinutrients in foods. Food Research International. 1993;26(2):131-149.
Available:https://doi.org/10.1016/0963-9969(93)90069-U

Umar KJ, Hassan LG, Dangoggo SM, Ladan MJ. Nutritional composition of water spinach (Ipomea aquatita fork.) leave. Journal of Applied Sciences. 2007;7(6): 803-809.
Available:https://doi.org/10.3923/jas.2007.803.809

Umar KJ, Hassan LG, Dangoggo SM, Inuwa M, Almustapha MN. Nutritional content of melochia corchorifolia (linn.) leaves. International Journal of Biological and Chemical. 2007;1(4):250-255.
Available:https://doi.org/10.3923/ijbc.2007.250.255

Ndong M, Wade S, Dossou N, Guiro AT, Gning RD. Valeur nutritionnelle du moringa oleifera, étude de la biodisponibilité du fer, effet de l'enrichissement de divers plats traditionnels sénégalais avec la poudre des feuilles. African Journal of Food Agriculture Nutrition and Development. 2007;7(3).

In: Oniang’o R, Grum M, Obel-Lawson E, editors. Developing Afrcan leafy vegetables for improved nutrition. Regional workshop, 6-9December 2005. Rural Outreach Program, Nairobi, Kenya. 2008; 9-15. Available: https://www.bioversityinternational.org/uploads/tx_news/Developing_African_leafy_vegetables_for_improved_nutrition_1513.pdf#page=17

Guan X, Yao H. Optimization of viscozyme L-assisted extraction of oat bran protein using response surface methodology. Food Chemistry. 2008;106(1):345-351. Available:https://doi.org/10.1016/j.foodchem.2007.05.041

Adjala L. The effect of boiling on the nutrients and anti-nutrients in two non conventional vegetables. Pakistan Journal of Nutrition. 2009;8(9):1430-1433.
Availale:http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.558.8960&rep=rep1&type=pdf

Nafir-Zenati S, Gallon G, Favier J-C. Effet de la cuisson sur la teneur en minéraux des épinards. Montpellier: Orstom. Multigr. Journées Internationales du GERM, 5, Balaruc, France.1992;7.
Available: http://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b _ fdi_33-34/36915.pdf

Delchier N. Devenir des folates au cours de la transformation des végétaux verts : identification des points clés et des mécanismes. Thèse de Doctorat, Alimentation et Nutrition. Université d’Avignon, France. 2012;302.
[Submitted on 5 September 2013]
Available: ttps://tel.archives-ouvertes.fr/tel-00858359/document

Holasová M, Fiedlerová V, Vavreinová S. Determination of folates in vegetables and their retention during boiling. Czech Journal of Food Science. 2008;26(1):31-37.
Available:https://81.0.228.28/publicFiles/00811.pdf

Medoua GN, Oldewage-Theron WH. Effect of drying and cooking on nutritional value and antioxidant capacity of morogo (Amaranthus hybridus) a traditional leafy vegetable grown in South Africa. Journal of Food and Sciences Technologies. 2014;51(4):736–742. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3982004/pdf/13197
_2011_Article_560.pdfDOI:https://doi.org/10.1007/s13197-011-0560-4