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Sprouting, a bioprocess supporting food industry?

La germination, un bioprocédé au service de l’industrie agro-alimentaire ?

Bibliographic Review

S. JRIBI1

M. CHABBOUH1

K. SASSI2

D. SFAYHI3

S. MARZOUGUI4

H. AMARA2

H. DEBBABI1

 

1 National Institute of Agronomy of Tunisia (INAT) UR17AGR01 “Valorization of the Tunisian natural and agro-food heritage through innovation”, University of Carthage, 43 Avenue Charles Nicolle, 1082 Tunis, Tunisia

2 National Institute of Agronomy of Tunisia (INAT), Genetic and Plant Breeding Laboratory, University of Carthage, 43 Avenue Charles Nicolle, 1082 Tunis, Tunisie

3 National Institute of Agronomic research of Tunisia (INRAT) de la Recherche Agronomique de Tunisie, Rue Hédi Karray, 2049 Ariana, Tunisia

4 National Institute of Cereal Crops (INGC), 8170 Bou Salem, Tunisie



Abstract – Recent scientific researches proved a strong link between the diet adapted and the prevalence of some diseases (cardiovascular diseases, diabetes, obesity…). The use of functional products may contribute in solving this problem. Wheat is a cereal quite present in Mediterranean diet as it has an energetic and nutritional interest (proteins, carbohydrate, fibers, vitamins…). Consumers in occidental countries become more and more interested by mini-processed, without chemicals, natural, safe food products. Sprouts are in agreement with this trend. Sprouting is a physiological event where a complex nutrients transfer occurs. The aim of this review was to describe sprouting process and its impact on nutritional properties of wheat seeds. During germination, storage molecules (proteins, starch) are degraded under enzymatic action. Added to, some bioactive compounds such as polyphenols, vitamins… are newly synthesized. Altogether, contribute in improving wheat nutritional quality. Sprouting affects also functional and sensory properties of wheat. All modifications occurring during sprouting make sprouted wheat seeds a functional ingredient, naturally enhanced by bioactive molecules. Its use in food industry would provide an added value.

Keywords: Wheat, Sprouting, Functional ingredient, Bioactive compounds, Wheat Technology

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Effect of refrigerated conditions on lipid peroxidation and fatty acid composition of clams (Venerupis decussata) tissues

L’effet de la réfrigération sur la peroxydation lipidique et la composition en acide gras de la chaire de la palourde (Venerupis decussata)



S. BEJAOUI1

F. GHRIBI1

I. CHETOUI1

FATMA AOUINI1

NEJLA SOUDANI1

M. EL CAFSI1

 

1 Unit of Physiology and Aquatic Environment, Faculty of Science of Tunis, University of Tunis El Manar, 2092 Tunis, Tunisia


Abstract – The effect of five refrigerating conditions (including fresh and stored lots at 15, 30, 90 and 180 days) on lipid peroxidation and fatty acid composition of clams (Venerupis decussata) tissues were investigated. All storage conditions reduced the moisture and lipid contents (p<0.05). Compared with fresh samples, the proportions of saturated (SFA) and monounsaturated (MUFA) storage increased (p<0.05), while polyunsaturated (PUFA) fatty acid content significantly decreased (p<0.05). This reduction was confirmed by a significant decrease in omega 3 content under all refrigerating conditions (p<0.01). Withal, Omega 6 increased after 90 and 180 days (p<0.05) but remained stable after 15 and 30 days of storage. Lipid peroxidation was observed for all stored samples when compared to the fresh ones. Results indicated that the effect of refrigeration on the fresh clams’ has reduced their nutritional quality as revealed by decease in the EPA+DHA, atherogenicity, thrombogenicity indices and omega (3)/omega (6) ratio after storage process (p<0.05). Overall, it is recommended that clams should not be stored more than 15 days in the refrigerator (+4°C). 

Keywords: Clams, Fatty acids, Nutritional quality indices, Thiobarbituric acid, Peroxide value

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Evaluation of integrated control based on the Cera Trap® and Moskisan® mass trapping system against Ceratitis capitata (Diptera: Tephritidae) on citrus fruits in Tunisian oases

Evaluation de la lutte intégrée basée sur le système de piégeage de masse Cera Trap® et Moskisan® contre Ceratitis capitata (Diptera : Tephritidae) sur agrumes dans les oasis Tunisiennes



S. BEN CHAABAN1

K. MAHJOUBI1

S. BEN MAACHIA1

N. NASR2

 

1 Regional Research Centre of Oasis Agriculture, Degache, Tunisia

2 FAO - Bureau sous-régional pour l'Afrique du Nord



Abstract – In this work, we evaluate the mass trapping technique based on the use of Moskisan® and Cera Trap® traps for the control of Mediterranean fruit fly on two citrus varieties Clementine and Thomson in two oasis: "oasis Gafsa" and "oasis" Midès ''.The two mass trapping techniques Cera Trap® et Moskisan® showed good performance to combat Mediterranean fruit fly in Gafsa oasis and Midès oasis. Concerning adult males Medfly captures, reductions of 43.9% and 23.5% respectively at the Gafsa oasis and the Midès oasis. Results indicated significant differences in fruit damage percentages between the two tested methods and the control. At the oasis Midès, at harvest the percentage of fruit damage of Clementine is 8% in the treated plot while it reached 30% in the control plot. While for the Thomson variety the damage at the treated plot and the control plot were respectively 1.5 and 23%. In Gafsa, the damage to the harvest was of the order of 6% of fruit stung for the Clementine against 25% in the control plot. Regarding the Thomson variety, Moskisan® traps reduced attacks by 18 to 3.5%. Thus, results obtained from this study showed that the mass trapping technique based on the use of Moskisan® and Cera Trap® traps could be involved as an appropriate strategy for the control of the Medfly in Tunisian oases.

Keywords: Ceratitis capitata, Cera Trap®, Moskisan®, Citrus, oasis, Tunisia

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Development of agro-environmental indicators in a Mediterranean arid zone

Mise au point d’indicateurs agro-environnementaux dans la zone aride de la Tunisie (Délégation Nafta)



F. KHEBOUR ALLOUCHE1,2

K. AISSA1

D. OUERCHEFANI3

E. DELAITRE4

 

1 University of Sousse, Tunisia/ High Institute of Agronomic Sciences-Chott Meriem, Tunisia

2 Université de Carthage/ INAT/ Lr GREE TEAM 11 (LR17AGR01), Tunis, Tunisia

3 Institut des Régions Arides (IRA), Unité de télédétection et SIG, Mednine, Tunisia

4 Institut de Recherche pour le Développement (IRD), Unité Espace-DEV, Montpellier, France

 

 

Abstract – The study is conducted to insinuate on impact of global climate changes. The study area is chosen in the region, as one of sustainable oasis located in southern Tunisia. An approach, based on spatial GIS analyses, was developed in order to define global indicators related to temporal changes in a peri-urban landscape. Also, a number of three very High resolution multi-temporal space images (2008, 2013 and 2016) extracted from GoogleEarth ©. The images were scanned, digitally processed and used in producing three multi-temporal land use maps of the study area. The results showed the detection of three indicators, namely urban sprawl, agricultural recovery and agricultural decline. It was found that during the two periods 2008-2013 and 2013-2016, there was a steady increase in urban sprawl change indicator. However, the landscape of change indicator scored over the region during the first period (2008-2013). The spatial distribution of the agricultural decline indicator is increasing between the two periods. These monitoring indicators may support decision-makers for agricultural or landscaping management.

Keywords: Google Earth ©, GIS, landscape, indicator, change detection, Urban sprawl

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Effects of supplementing diets with thymol on performance growth and caecal microflora of growing rabbit

R. BEN RHOUMA1*

M.S. ABBASSI MOHAMED2

A. BOUBAKER1

 

1 Department of Animal Sciences, National Institute of Agronomy of Tunisia, 43 avenue Charles Nicolle, 1082 Mahrajène, Tunisia.

2 Institute of Veterinary Research of Tunis, avenue Djebel El Akhdhar Errabta, 1006 Bab Souika, Tunisia.



Abstract – This study aimes to evaluate the effect of different levels of thymol on zootechnical performances, caecal microflora and the quality of rabbit carcass during the summer season. For this experiment, 90 rabbits (35 days old) were divided into three homogeneous groups: T: control with no thymol and the other two groups with thymol (T1 and T2) which received 200 and 300 g/T of the thymol, respectively. Each of the 3 diets was fed to replicates of 6 rabbits each from day 35 to 77. The incorporation of thymol in the diet did not affect significantly (P > 0.05) the average daily gain, feed conversion rate, survival and carcass yields during the summer period. However, thymol supplementation did influence E. coli and Lactobacillus.

Keywords: thymol, growth performance, caecal microflora, weaned rabbits.

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Copyright

This article is published under license to Journal of New Sciences. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

CC BY 4.0