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Etude de la composition biochimique de la chair et des co-produits de la crevette royale "Penaeus kerathurus" du nord et sud de la Tunisie

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Author
Limam, Z.
Sadok, S.
El Abed, O.
Date
2010

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Alternative Title
دراسة المحتويات البيوكيميائية للحم و فواضل الجمبري Penaeus kerathurus المستخرجة من الشمال والجنوب التونسي
Biochemical composition of muscle and processing by-products of Penaeus kerathurus caught off the north and the south coasts of Tunisia
Abstract
La comparaison de la composition biochimique de la chair et des déchets (têtes, queues et carapaces) de Penaeus kerathurus du nord et sud de la Tunisie a été réalisée (protéines totales, lipides totaux, matière sèche, composition en acides gras, azote basique volatil total (ABVT) et acides aminés totaux libres (AATL)). La matière sèche a varié entre 23,77 et 26,06%. Pour tous les échantillons les taux d’ABVT sont restés inférieurs aux seuils limites (20 mg /100g). Les teneurs en acides aminés totaux libres et des lipides des co-produits chez les deux lots de Penaeus kerathurus sont supérieures à celles de la partie consommable. Les acides gras polyinsaturés (AGPI) constituent la partie majeure des acides gras totaux des tissus et co-produits de Penaeus kerathurus des deux régions, suivie par les acides gras saturés (AGS) et monoinsaturés (AGMI). Les acides gras les plus fréquents sont C16:0, C20:5n-3 (EPA), C22:6n-3 (DHA), C18:1n-9, C18:0, C16:1n-7, C20:4 et C18:1n7
تم القيام بدراسة المحتويات البيوكيميائية للحم وفواضل الجمبري) (Penaeus kerathurus (الرأس، الذيل والقشرة) فيما يخص البروتينات، الدهنيات، السكريات، المادة الجافة، الأحماض الدهنية و الازوت القاعدي المتبخر الكامل. لقد تراوحت نسبة المادة الجافة بين % 26.06 – 23.77. كما ظلت نسبة الازوت القاعدي المتبخر الكامل تحت المعدل المسموح 35مغ/100غ. أما في ما يخص الحامض الاميني الكامل السائب و الدهنيات لفواضل الجمبري لكلتي المجموعتين وجدت ارفع من الجزء الذي يستهلك. تمثل الأحماض الدهنية كثيرة عدم التشبع القسط الأكبر من الأحماض الدهنية الكاملة للحم و فواضل (Penaeus kerathurus) بالجهتين مصحوبة بالأحماض الدهنية المشبعة و الأحادية عدم التشبع.من الأحماض الدهنية الأكثر تواجدا 16:0, C20:5n-3 (EPA), .C22:6n-3 (DHA), C18:1n-9, C18:0, C16:1n-7, C20:4 et C18:1n7
Biochemical composition of muscle and processing by-products (heads, shells and tails) of Penaeus kerathurus caught off the north and the south coasts of Tunisia was investigated (Total protein, total lipid, dry matter, fatty acids composition, total volatile basic nitrogen, free amino acids). Dry matter ranged from 23,77 to 26,06%. Total Volatile basic nitrogen (TVBN) of all samples was less than 20mg/ 100g which are thought to be the acceptable limit of marine products. The free amino acids amounts of the processing by-products from two regions were higher than the edible parts. The percentage of polyunsaturated fatty acid was important in the tissues and by-products of both species from both regions. Thus, polyunsaturated fatty acids constitute the major fraction followed by saturated fatty acids and monounsaturated. The main fatty acids in both shrimp species muscle and by-products were C16:0, C20:5n-3, C22:6n-3, C18:1n-9, C18:0, C16:1, C20:4 and C18:1n-7.
Journal
Bulletin de l'Institut National des Sciences et Technologies de la Mer
Volume
37
URI
http://hdl.handle.net/1834/4702
Collections
Articles - Bulletin
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