الرئيسية بلوق الصفحة 4091

تقييم بعض صفات الجودة لبعض منتجات شراب الشعير المتوفرة في الأسواق المحلية في مدينة براك، ليبيا

الملخص

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هناك العديد من الأصناف التجارية من مشروبات الشعير غير الكحولية في أسواق مدين براك بليبيا ، والمستوردة من بلدان مختلفة. وكان الهدف من هذا الدراسة ه و التحقق فيما إذا كانت هذه الأصناف تتوافق مع المواصفات القياسية لمشروب ماء الشعير الغازي الخالي من الكحول ، ومدى تطبيق هذه المواصفة والتقيد بها. أجريت هذه الدراسة في مختبرات قسم الصناعات الغذائية، كلية العلوم الهندسية والتقنية، جامعة سبها، وقدتم اختبار 12 عينة بنكهات مختلفة لثلاثة أصناف تجارية رائجة من منتجات شراب الشعير )باربيكان، ومحتواها من السكريات والمواد الصلبة الكلية الذائبة ،)pH( فيروز، موس ي( حيث تم تقدير الأس الهيدروجيني والرماد والصابونين. وقد وجد أن جميع العينات لها أس هيدروجيني يتراوح بين 3.56 و 3.84 . في حين أن فقد تبين من النتائج أن جميع العينات لا ،)pH( المواصفات القياسية الليبية لم تشر إلى الأس الهيدروجيني فيما يتعلق )GSS والمواصفات القياسية الخليجية ) 2007 )ESS تتماش ى مع المواصفات القياسية المصرية ) 2005 لقد تم تسجيل أعلى مستوى للسكريات الكلية في الصنف باربيكان، ولقد تراوحت نسبة المواد الصلبة .pH بال الكلية الذائبة لجميع الأصناف من 11.00 إلي 14.50 ، والتي اتفقت مع ما حددته المواصفات القياسية. و خلاصة القول أن منتجات شراب الشعير في مدينة براك لا تتوافق مع المعايير المصرية و الخليجية من ناحية الحموضة و نسبة المواد الصلبة و السكريات.
الكلمات المفتاحية: الجودة، شراب الشعير، مدينة براك، ليبيا

الباحثون

د. محمد عبد الله أحمد* د. علي مختار الجربي م. آية علي عبد السلام م. إزدهار عبد الكريم  د. جمال إبراهيم الزوي
قسم الصناعات الغذائية، كلية العلوم الهندسية والتقنية، جامعة سبها

DOI: 10.12816/0025268 Full-text PDF

Evaluation of Oxidative Stability of Vegetable Oils during Deep Frying

Abstract

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The oxidative degradation of the used oils were evaluated by monitoring total polar compound (TPC), Iodine value (IV), Peroxide value (Pv), specific extinction E1% at 233nm and 269nm, and changes in the fatty acids profile. Three different types of edible oils, namely, corn oil, soybean, and palm olien, were used in deep fat frying at 180 oC ± 5oC for 5 h/d for three consecutive days. The result of this study indicates that palm olein showed significantly (P<0.05) lower in all measured parameters than the other oils used. For PV, the rate of increase was not constant as frying progressed. The extent of oil deterioration was best reflected in the changes in percent TPC, IV, E1%cm at 233nm.
Keywords: Fraying potato, chicken, frying deterioration, oxidation, Polymerization

Authors

Omar M Almrhag* & Frage L Abookleesh
Department of Food Technology, Sebha University

DOI: 10.12816/0025267 Full-text PDF

(Vicia faba L.) ISSR Markers Associated With Effects of Gamma Irradiation on Growth and Seed Yield of M2 Plants of Faba Bean

Abstract

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Dry seeds of six faba bean varieties (Sakha 1, Nubaria 2, Nubaria 3, Giza 3, Giza 716 and Giza 843) were irradiated with low doses of gamma rays (20, 40, 60, 80, 100 and 200 Gy). Treated seeds and control seeds were grown for two seasons. Results revealed that doses below 100 Gy increased morphological growth parameters as well as some yield parameters. The most effective dose varied in different faba bean varieties. Higher doses above 100 Gy were detrimental to plant growth and yield. The variation in ISSR profiling in response to girradiation treatments in M2 was detected using seven ISSR primers. The seven primers produced 81 bands including 75 polymorphic bands and 6 unique bands. The unique bands were scored in var. Nubaria 3 by the doses (20, 80 and 100 Gy), var. Giza 3 by the doses (20 and 60 Gy) and var. Nubaria 2 by the dose 200 Gy. The two varieties Nubaria 3 and Nubaria 2 showed higher numbers of polymorphic bands (225, 191) respectively compared to other varieties. Polymorphic information content (PIC) was estimated for each primer and ranged from 0.193 for primer 807 to 0.31 for primer 834 with a mean of 0.259.
Keywords: Mutation breeding, Gamma rays, Faba bean, Growth, Yield, ISSR.

Authors

Nora El-Gazzar 1, Laila Mekki 2, Samia Heneidak 1, Abdelfattah Badr 3
1 Botany Department, Faculty of Science, Suez University, Suez, Egypt
2 Botany Department, Faculty of Science, Suez Canal University, Ismailia, Egypt
3 Botany and Microbiology Department, Faculty of Science, Helwan University, Cairo, Egypt

DOI: 10.12816/0025266 Full-text PDF

EFFECT OF BIO-AND MINERAL NITROGEN FERTILIZERS ON GROWTH AND YIELD OF SNAP BEAN GROWN IN SUBSTRATE CULTURE

Abstract

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This study was conducted under unheated plastic house condition at Arid Land services and Research Center (ALARC), Faculty of agriculture – Ain Shams University, Egypt, during two successive autumn seasons 2007/2008 and 2008/2009 ability of use to investigate the Rhizobium inoculation as bio-fertilizer to reduce the use of mineral nitrogen fertilizers in the substrate culture and its effect on the growth and yield of Snap bean (phaseolus vulgaris L.) cv. Goya Four different mineral nitrogen rates (25%, 50%, 75% and 100% of 200 ppm) with Rhizobium inoculation compared to 100% mineral N without inoculation also two different types of substrate systems (containers and pots) were in this investigation. The experimental design was split plot with three replicates. Vegetative growth, plant height, chlorophyll reading (spad), total leaves area, early and total yield, chemical analysis of pods, total soluble solids (T.S.S.%), total protein, total nitrogen content, number of nodules and nitrogenase activity were measured. Data showed that container system had a significant effect on vegetative growth parameters (plant height, chlorophyll reading (spad), and total leave area), and fruit weight (early and total fruit weight). Chemical properties of pods, number of nodules and nitrogenase activity compared to pots system. Control treatment (100% N without inoculation) and (100% N with inoculation) recorded the highest vegetative growth, early and total yield, T.S.S.(%), pod protein and total nitrogen content followed by 50 % N with Rhizobium inoculations. Moreover, data showed that 50% N gave the highest number of nodules and nitrogenase activity. Data showed that there were no significant among controls, 100%, 75% and 50% N combined with container and 100% N combined with pots followed by control combined with pots. Increase nitrogen rates led to increase the values of plant height, chlorophyll reading (spad), early yield and total yield.
Keywords: Snap bean (phaseolus vulgaris L.), substrate system, Rhizobium inoculation, mineral nitrogen, container system, pots system and Nitrogen fixing activity.

Authors

M. S. A. Emam1, Z. El-S Lacheene2, M. A. Medany3, U. A. El-Behairy4 and A. F. Abou Hadid5
1. Central Laboratory for Agricultural Climate, Agriculture Research Center, Giza, Egypt.
2, 4, 5. Horticulture Dept., Faculty of Agric., Ain Shams University. Shoubra El-Kheima ,Cairo,Egypt.
3. Agriculture Research Center, Ministry of Agriculture and land Reclamation, Giza, Egypt.

DOI: 10.12816/0025265 Full-text PDF

Determination of Total Polyphenols, Flavonoids Contents and Antioxidant Activity of Crude Methanolic and Aqueous Extracts for Some Medicinal Plants Flowers

Abstract

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The total polyphenols and flavonoids contents of C. cardunculus, A. millefolium, C. officinalis, and M. chamomilla flowers, C. officinalis flowers have the highest of total polyphenols and flavonoids contents, which were 86.11 mg GAE/g and 11.59 mg GAE/g, respectively. Methanolic and aqueous extracts of plant flowers was antioxidant activity by used (FRAP, ABTS and DPPH) The methanolic and aqueous extracts of C. officinalis flowers have the highest reducing power which was ranged from 0.5054 to 1.8019 and 0.4215 to 1.3153 at the concentrations of 10 and 80 mg/ml, respectively. Also, by used (ABTS) it could be percentage were 90.17and 79.31%, While, by used (DPPH) it could be percentage of inhibition (IC50) which were 0.004 and 0.006 for methanolic and aqueous extracts respectively.
Keywords: polyphenols, flavonoids, plant extracts, antioxidant activity (FRAP-ABTS-DPPH).

Authors

Erian, N. S.; H. B. Hamed, A. Y. El-Khateeb & M. Farid
Department of Agriculture Chemistry, Faculty of Agriculture, Mansoura University, Egypt.

DOI: 10.12816/0025264