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Register a new userEvaluation the Physiochemical and Functional Properties of Mucilage Extracted from The Fruits of Jujube "Zizyphus sp"
تقييم الخصائص الفيزيوكيميائية و الوظيفية للصمغ المستخرج من ثمار العناب "Zizyphus sp"
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Added by
Tishreen University ورقة بحثية
Publication date
2016
fields
Food Sciences
and research's language is
العربية
Created by
Shamra Editor
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هدفت هذه الدراسة إلى استخلاص الصمغ من ثمار العناب للنوعين العناب العادي Z .jujube و العناب البري LotusZ. و دراسة الخصائص الفيزوكيميائية و الوظيفية له و أجريت عملية الاستخلاص تحت ظروف موحدة من درجات الحرارة و نسبة خلط الثمار مع الماء و نسبة المذيب المستخدم في الترسيب . بلغ مردود الصمغ المستخلص من ثمار العناب العادي 5.8غ/100 غ من الوزن الجاف للثمار بينما كان أعلى من ذلك بكثير بالنسبة للصمغ الناتج من ثمار العناب البري حيث وصل المردود إلى 25.23غ /100 غ من الوزن الجاف للثمار. كانت قيم الرقم الهيدروجيني و معامل الانكسار و معامل هاوسنر و معامل الانضغاط و معامل الانتفاخ في الماء لصمغ العناب العادي (6.32 , 1.3348 ,1.048 ,4.68 ,4.28) على التوالي ,بينما كانت في صمغ العناب البري (6.32 ,1.3360 ,1.162 ,13.41 , 5.42) على التوالي و كانت قيمة الكثافة النوعية لمحلول الصمغ المحضر بتركيز 1% في صمغ العناب العادي 1.0021غ/سم3 و بلغت في صمغ العناب البري 1.0025غ/سم3, أما قيمة كثافة الكتلة و الكثافة المنقورة فقد بلغت في مسحوق الصمغ الناتج من ثمار العناب العادي (0.41 و 0.43)غ/سم3 على التوالي في حين كانت في الصمغ الناتج من ثمار العناب البري (0.43 و (0.50غ/سم3 على التوالي . أما في ما يتعلق بالخصائص الوظيفية للصمغ المدروس كانت قيم كل من قابلية ربط الماء و اللزوجة و قابلية ربط الزيت و القدرة الاستحلابية للصمغ الناتج من ثمار العناب العادي على التوالي 14.6غ ماء/غ صمغ جاف –1.19 سنتي بويز-2.52غ زيت عباد شمس/غ صمغ جاف –%50 , فيما كانت أعلى من ذلك في الصمغ الناتج من ثمار العناب البري حيث وصلت إلى 34غ ماء/غ صمغ جاف –1.23 سنتي بويز- 3.22غ زيت عباد شمس/غ صمغ جاف –%51.6 . تشير النتائج إلى إمكانية استخدام الصمغ المستخرج من ثمار العناب للنوعين العادي و البري كمادة مثبتة في بعض الصناعات الغذائية.
The purpose of this present research isto evaluate two types of mucilage from two types of jujubefruits: Z.jujube and z. Lotus, and to analyze the physicochemical and functional properties of this mucilage. The extraction process for both types were performed under the same conditions of temperature, mixing ratio and proportion of the solvent used in the deposition process. The yield of mucilage were extracted from Z .jujube is being 5.8 g mucilage/100g dry weight, while the yield of Z. lotus is being to 25.23 g mucilage/100g dry weight The values of pH, Refractive index, Hausnerindex, Compressibility index and Swelling index for Z. jujube mucilage were: (6.32, 1.3348, 1.048, 4.68, 4.28) respectively .While those values for Z. lotus mucilage were: (6.32, 1.3360, 1.162, 13.41, 5.42) respectively. The specific gravity value for 1%solutionof Z. jujube mucilage were 1.0021 g/cm3while for Z. lotus mucilage: 1.0025g/cm3. The values of theBulk density and Tap density for mucilage powder for Z. jujube ( 0.41- 0.43)g/cm3respectively, and for Z. lotus( 0.43- 0.50)g/cm3respectively. As for the functional characteristics of thestudied mucilage, the values of water holding capacity, viscosityand oil holding capacity were: 14.6g water/g dry mucilage, 1.19 centipoise, 2.52g oil/g dry mucilage and emulsification capacity 50% for Z. jujube. While it was higher in the Z .lotus mucilage 34g water/g dry mucilage,1.23 centipoise,3.22 g oil/g dry mucilage and emulsification capacity 51.6% . These results indicate that the mucilage extracted from both mentioned types of jujube can be used as stabilizer in the field of food industry.
References used
ADEBOWALE, K. O., T. A. AFOLABI, AND B. I. Olu-Owolabi. Functional physicochemical and retrogradation properties of sword be-an (canavalia gladiata) acetylated and oxidized starch. carbohydrate Polym.,2006, 65: 93- 102
Chen, R.H. ,Chen, W.Y. Rheology properties of the water-soluble mucilage of a green laver,Monostroma nitidium. Journal of Applied Phycology,2001,(13),pp: 481-488
Cui, W. and G. Mazza. Physicochemical characteristics of flaxseed gum. Food Res. Inter,1996, 29(3-4): 397-402
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