the effects of different mixing times and different temperatures of the mixing unit on some quality and quantity features of extracted olive oil, roghany varieties

نویسندگان

عباس اکبرنیا

حسین مبلی

اسداله اکرم

منوچهر حامدی

شاهین رفیعی

چکیده

to assess the effect of time and temperature (in the pumice mixing phase of olive oil extraction) on the quantity and quality features of the extracted oil, a series of experiments comprised of three levels of mixing time (10, 20, and 30 min), and three levels of mixing temperature (30, 45, and 60°c) were carried out. the recorded data were analyzed in the framework of a randomized complete block design (rcbd). a comparison of means as based upon duncan's multiple range test revealed an increase in oil acidity and peroxide level (decrease in oil quality) with increase in mixing time and temperature. an increase in pumice moisture content, accompanied by a resulting decrease in oil content, was also observed with the increase in mixing time and temperature, ending up with a final decrease in the quantity of oil extracted. the most appropriate time and temperature of pumice mixing during the extraction operation of olive oil for obtaining a reasonable quantity of the most quality oil were finally recorded and suggested as 20min and 30°, respectively.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

the effects of roller crusher speed and mixing temperature on quality and quantity of extracted olive oil, roghany variety

to study the mechanical and thermal parameters effective on quality and quantity of olive oil towards an extraction of highly pure oil, the velocity in rps of crushing rollers, at two levels of 6 and 12 (rps) along with the temperature of the mixing unit at three levels of 30, 45 and 60°c were taken into account. data, obtaind through a factorial experiment of randomized complete block design (...

متن کامل

the effects of speech rate,prosodic features, and blurred speech on iranian efl learners listening comprehension

کلید واژه ها به زبان انگلیسی: effect of speech rate on listening comprehension, blurred speech,segmental and suprasegmental features,authentic speech,intelligibility, discrimination, omission, assimilation چکیده: سرعت مطالب شنیداری در کلام پیوسته بطور کلی همواره کابوسی بوده برای یادگیرنده های زبان دوم و بالاخص برای شنوندگان ایرانی. علی رغم عقل سلیم که کلام با سرعت کندتری فعالیتهای درک مطلب شن...

15 صفحه اول

on the relationship between using discourse markers and the quality of expository and argumentative academic writing of iranian english majors

the aim of the present study was to investigate the frequency and the type of discourse markers used in the argumentative and expository writings of iranian efl learners and the differences between these text features in the two essay genres. the study also aimed at examining the influence of the use of discourse markers on the participants’ writing quality. to this end the discourse markers us...

15 صفحه اول

the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance

this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...

15 صفحه اول

the effects of time planning and task complexity on accuracy of narrative task performance

هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
مهندسی بیوسیستم ایران

جلد ۴۰، شماره ۱، صفحات ۰-۰

کلمات کلیدی
[ ' t o a s s e s s t h e e f f e c t o f t i m e a n d t e m p e r a t u r e ( i n t h e p u m i c e m i x i n g p h a s e o f o l i v e o i l e x t r a c t i o n ) o n t h e q u a n t i t y a n d q u a l i t y f e a t u r e s o f t h e e x t r a c t e d o i l ' , ' a s e r i e s o f e x p e r i m e n t s c o m p r i s e d o f t h r e e l e v e l s o f m i x i n g t i m e ( 1 0 ' , 2 0 , ' a n d 3 0 m i n ) ' , ' a n d t h r e e l e v e l s o f m i x i n g t e m p e r a t u r e ( 3 0 ' , 4 5 , ' a n d 6 0 ° c ) w e r e c a r r i e d o u t . t h e r e c o r d e d d a t a w e r e a n a l y z e d i n t h e f r a m e w o r k o f a r a n d o m i z e d c o m p l e t e b l o c k d e s i g n ( r c b d ) . a c o m p a r i s o n o f m e a n s a s b a s e d u p o n d u n c a n & a p o s ; s m u l t i p l e r a n g e t e s t r e v e a l e d a n i n c r e a s e i n o i l a c i d i t y a n d p e r o x i d e l e v e l ( d e c r e a s e i n o i l q u a l i t y ) w i t h i n c r e a s e i n m i x i n g t i m e a n d t e m p e r a t u r e . a n i n c r e a s e i n p u m i c e m o i s t u r e c o n t e n t ' , ' a c c o m p a n i e d b y a r e s u l t i n g d e c r e a s e i n o i l c o n t e n t ' , ' w a s a l s o o b s e r v e d w i t h t h e i n c r e a s e i n m i x i n g t i m e a n d t e m p e r a t u r e ' , ' e n d i n g u p w i t h a f i n a l d e c r e a s e i n t h e q u a n t i t y o f o i l e x t r a c t e d . t h e m o s t a p p r o p r i a t e t i m e a n d t e m p e r a t u r e o f p u m i c e m i x i n g d u r i n g t h e e x t r a c t i o n o p e r a t i o n o f o l i v e o i l f o r o b t a i n i n g a r e a s o n a b l e q u a n t i t y o f t h e m o s t q u a l i t y o i l w e r e f i n a l l y r e c o r d e d a n d s u g g e s t e d a s 2 0 m i n a n d 3 0 ° ' , ' r e s p e c t i v e l y . ' ]

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023