تاثیر پوشش خوراکی ایزوله پروتئین سویا و تیتانیوم دی اکسید بر کیفیت و عمر انباری ارقام انگور حسینی و قزل اوزوم

نویسندگان
1 دانش آموخته کارشناسی ارشد، گروه علوم و صنایع غذایی، موسسه آموزش عالی صبا، ارومیه، ایران
2 دکتری تخصصی بیوتکنولوژی مواد غذایی، گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران
3 استاد، گروه علوم و صنایع غذایی، دانشکده کشاورزی و منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران
4 دانشجوی دکتری تخصصی بیوتکنولوژی و اصلاح درختان میوه، گروه علوم باغبانی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران
5 دانشجوی دکتری تخصصی، گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه صنعتی اصفهان، اصفهان، ایران
چکیده
از مهم­ترین عوامل محدود کننده عمر حبه­های انگور می­توان به از دست رفتن آب و پوسیدگی­های قارچی پس از برداشت اشاره نمود. در این پژوهش، خوشه­های یکنواخت و عاری از هرگونه بیماری و آسیب فیزیکی دو رقم انگور (قزل­اوزوم و حسینی) با استفاده از پوشش خوراکی حاوی نانوذرات تیتانیوم­ دی­اکسید (TiO2) و ایزوله پروتئین سویا (جهت کنترل پوسیدگی پس از برداشت و افزایش عمر انبارمانی) و بدون پوشش خوراکی (کنترل) بسته­بندی شدند. سپس خوشه­ها به مدت 31 روز در سردخانه­ای با دمای 1±0 درجه سانتی­گراد و رطوبت نسبی 5±90 درصد نگهداری شدند و ویژگی­هایی نظیر درصد ریزش حبه­ها، مواد جامد محلول کل (TSS)، اسیدیته قابل تیتراسیون (TA)، pH، محتوای فنول کل، رنگ و شفافیت حبه­های انگور، فعالیت آنتی­اکسیدانی و میزان قند کل حبه­های انگور در فواصل زمانی 6 روزه اندازه­گیری شدند. آنالیز آماری نتایج به دست آمده نشان داد که تیمار با نانوذرات TiO2 تاثیر معنی­داری را در کاهش ریزش حبه­های انگور نسبت به نمونه­های کنترل داشت. این تیمار موجب بهبود طعم و مزه، بازارپسندی و کیفیت ظاهری بهتری در مقایسه با نمونه­های بدون تیمار نانوذرات TiO2 گردید. همچنین نمونه­های تیمار شده با نانوذرات TiO2 و ایزوله پروتئین سویا میزان TSS، TA، فعالیت آنتی­اکسیدانی و قند کل، میزان فنول کل بالاتری را از خود نشان دادند. مشاهده گردید هر دو رقم میوه انگور تیمار شده با نانو ذرات TiO2 و ایزوله پروتئین سویا نسبت به نمونه­های شاهد کیفیت بالاتری در پایان دوره انبارداری از خود نشان دادند.

کلیدواژه‌ها

موضوعات


عنوان مقاله English

Effect of soy protein isolate and TiO2 edible coating on quality and shelf-life of grapes varieties Hosseini and Ghezel Ozom

نویسندگان English

Fereshteh Hoseiniyan 1
Saber Amiri 2
Mahmoud Rezazadeh Bari 3
Laya Rezazad Bari 4
Sona Dodangeh 5
1 M.Sc. graduated, Department of Food Science and Technology, Saba College of Higher Education, Urmia, Iran
2 PhD. of Food Biotechnology, Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
3 Professor, Department of Food science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran
4 PhD student of Biotechnology and Breeding of Fruit Trees, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran
5 PhD student of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
چکیده English

The most important post harvesting factors that limiting grape berries after post harvesting are water losing and fungal decay. In this study, effect of titanium dioxide (TiO2) and soy protein isolate edible coating against postharvest decay and increasing the storage life of table grape cultivar was investigated. Uniform clusters with no disease and physical damage were packed with coated and uncoated (control) TiO2 nanoparticles. Then clusters were maintained for 31 days in cold storage at 0 ± 1 °C and RH 90 ± 5%. Grape berries abscission rate, total soluble solids (TSS), titratable acidity (TA), total phenolic content, color and clarity of grape berries, pH, antioxidant activity and total sugar characteristics were measured at intervals 6 days. The statistical analysis of results showed that the TiO2 nanoparticles treatment had significant effects in cluster and grape berries weight losing, fungal infection, TA, total phenol content and coefficient of ripening. This treatment had best flavor, quality, appearance and marketability compared with the samples without TiO2 nanoparticles treatment. In addition, the samples that treated with TiO2 nanoparticles showed higher TSS, TA, antioxidant activity, total sugar and total phenolic content. In the present study, two varieties of grapes treated with TiO2 nanoparticles in the comparison of control samples had higher quality at the end of the storage period.

کلیدواژه‌ها English

Edible coating
Soy protein isolate
TiO2
Grapes
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