تناول هذا البحث إمكانية الاستفادة من مصل الجبن في إنتاج مشروبات مرطبة مدعمة بعصائر طبيعية (دراق, برتقال, تفاح, رمان). و قد تم الحصول على المصل مخبرياﹰ بنوعيه (الحلو و الحامضي), و تحديد أهم الخواص الحسية و الكيميائية للمصل الناتج, حيث كانت نسبة المواد الصلبة الكلية و اللاكتوز في المصل الحلو 6.2 ± 0.2, 4.5 ± 0.2 على التوالي, أما في المصل الحامضي فكانت نسبة المواد الصلبة و اللاكتوز
5.4 ± 0.2, 3.8 ± 0.2 على التوالي.
أثبت التقييم الحسي للمصل الحلو الطازج قابلية متوسطة للاستهلاك, بينما كان المصل الحامضي غير مقبول لدى فريق المحكمين عند مستوى معنوية 5%. و بين التقييم الحسي أن أفضل نسب الخلط كانت 50 – 50 حجماً للمصل و العصير, حيث كانت درجة القبول جيدة جداﹰ. و قد تفوق المشروب المصنع من عصير البرتقال على الأنواع الأخرى عند مستوى معنوية 5%, و جاء بعده المشروب المصنع من عصائر الرمان, التفاح, الدراق على التوالي. و بالنتيجة يمكن استخدام المصل الحلو بعد خلطه بأحد العصائر المدروسة بنسبة تزيد عن 40 %, و المثلى 50 %, لإنتاج مشروب مرطب جيد يجب استهلاكه خلال 24 ساعة على الأكثر بسبب انخفاض قابليته للتخزين, نظراﹰ لخلوه من المواد الحافظة و عدم تعريضه لأي معاملة حرارية, و يحتاج تحسين هذه القابلية إلى إجراء المزيد من الدراسات.
This research investigates the ability of using cheese whey in producing soft drinks supported with natural juices (peach, orange, apple, and pomegranate). Two kinds of whey (sweet and sour) were prepared in the laboratory, and their most important organoleptic and chemical properties were determined. The percentages of total solids and lactose in sweet whey were 6.2 ±0.2% and 4.5 ±0.2% respectively, while for sour whey were 5.4 ±0.2% and 3.8 ±0.2%.
Organoleptic evaluation showed that the fresh sweet whey had medium ability for consumption, while sour whey was rejected by the team of tasters with a significance level of 5%. Organoleptic evaluation also showed that the best percentage for the mixture of sweet whey and juice is 50:50 (v/v) with a very good degree of acceptance. Statistical analysis indicated that the produced drink from orange juice was the best drink at 5% significance level. It was followed by the juices of pomegranate, apple and peach respectively. As a result the sweet whey may be used after mixing it with the other studied juices at a percentage exceeding 40%, (best value is 50%) for the production of good soft drink. This produced drink must be consumed within a maximum period of 24 hours because of its low storability due to the absence of preservatives and heat treatment. Improving this storability requires further studies.
References used
BURRINGTON, KJ. More than just milk., Milk Dairy J., 41, 2002, 227-237
DE WIT, J.N. Lecturer`s. Handbook on Whey and Whey products. European WPA, Belgium, 2001,404
DICK, ZIGGERS. Whey - more than a cheese by-product. Milk Dairy J., 45, 2009, 145- 156
FOISSY, H.. Technologie der Milch. Universität für Bodenkultur Wien; IMB Verlag, Wien, 2005, 315
GOFF, D. Dairy Science and Technology Education, University of GuelPH, Canada, 32, 2005, 432-439
This study aimed to estimate the concentration of conjugated linoleic acid
(CLA) in some Syrian cheeses available in local market and the daily
consumption of CLA due to its health importance and nutrition properties.
Five types of cheeses were us
A new analytical method has proposed for determination of
five synthetic colorants used in the wine industry (i.e., Tartrazine,
Brilliant Black, Sunset yellow, Brilliant Blue and Erythrosine) by
reversed-phase high-performance liquid chromatograph
Spices are becoming increasingly important world-wide due to their effectiveness as natural antibiotics, the thing that makes the world nowadays tend to use spices instead of chemical drugs. However, this doesn’t mean they are free of some dangerous
In this research, two types of studies were conducted: the first type is a quantum study of some uranium compounds, and the second type is an experimental study to separate some radioactive isotopes.
Enterobacter sakazakii is considered an opportunistic pathogen that has
been associated with severe lethal infections especially in neonates, elderly, and
Immunocompromised adults. E. sakazakii is a Gram negative, facultative
anaerobes rod-shaped