determination of some physical, mechanical and hydrodynamic properties of scolymus

نویسندگان

احمد جهان بخشی

دانشجوی کارشناسی ارشد/ دانشگاه ایلام رضا یگانه

معاون آموزشی دانشکده کشاورزی/ دانشگاه ایلام ابوالفضل آخوندزاده یامچی

دانشجوی کارشناسی ارشد/ دانشگاه ایلام

چکیده

background and objectives: scolymus is one of most abundant plants of mountain areas iran, because of role in the digestion of food auxiliary is located the focus of attention consumers. in iran, more than 17 percent of crops in various stages of the supply becomes losses, which requires knowledge of physical properties, mechanical and hydrodynamic agricultural products. the existence of the information about the physical properties, mechanical and hydrodynamic of scolymus can be widely used in the design of machines, transfer, separation, hydraulic grading, washing, quality inspection, maintenance and processing. because reduce crop losses and increase efficiency of operations to be processed scolymus.materials and methods: in this study, some physical properties, mechanical and hydrodynamic properties of scolymus were measured in three replications under standard conditions. the physical properties including length, width, thickness, geometric and arithmetic mean diameter, mass, volume, density, sphericity, surface area, aspect ratio and moisture content on wet basis were measured. the mechanical properties of the samples when shear and bending (break), of scolymus from the middle of its length measured by instron machine zwick/roell under required standards. the hydrodynamic properties for the transfer, sorting and grading of scolymus were carried by water.results: the physical properties of length, width, thickness, mass, volume and geometric mean diameter direct relationship and density (density) an inverse relation with the size of the scolymus. shape, size, volume, surface and density are among the physical properties that are important in many issues related to the design of a specific machine or in analysis of obtained behaviors in transporting material. for mechanical properties in bending tested elastic modulus, maximum force needed to bending scolymus, work done to achieve maximum force needed to bending and deformation in order to apply maximum force respectively 0.00341 gpa, 41.5 n, 444.29 n.mm, 18.91 mm and the shear test shear modulus, the maximum force needed to shear scolymus, shear strength, shear deformation when applying maximum force were calculated respectively 0.002 n/mm2, 82.9 n, 0.0207 n/mm2, 19.15 mm. information obtained from the mechanical properties of scolymus in shear test and bending can be used by scolymus processing factories. hydrodynamic properties of scolymus include the riseing time in the water column, average limit speed and average flotation force exerted on scolymus in the water column was obtained respectively, 4.67 s, 0.02 m/s and 0.93 newton. the density of scolymus was lower than water and as a result it can be graded and transmitted hydraulically and without any harm.conclusion: the data obtained from this study can be used for design, optimization, process equipment, transport, sorting and packing of scolymus.

برای دسترسی به متن کامل این مقاله و 23 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

determination of some physical and mechanical properties red bean

چکیده: در این تحقیق، برخی خواص فیزیکی و مکانیکی لوبیا قرمز به-صورت تابعی از محتوی رطوبت بررسی شد. نتایج نشان داد که رطوبت بر خواص فیزیکی لوبیا قرمز شامل طول، عرض، ضخامت، قطر متوسط هندسی، قطر متوسط حسابی، سطح تصویر شده، حجم، چگالی توده، تخلخل، وزن هزار دانه و زاویه ی استقرار استاتیکی در سطح احتمال 1 درصد اثر معنی داری دارد. به طوری که با افزایش رطوبت از 54/7 به 12 درصد بر پایه خشک طول، عرض، ضخام...

15 صفحه اول

some properties of fuzzy hilbert spaces and norm of operators

in this thesis, at first we investigate the bounded inverse theorem on fuzzy normed linear spaces and study the set of all compact operators on these spaces. then we introduce the notions of fuzzy boundedness and investigate a new norm operators and the relationship between continuity and boundedness. and, we show that the space of all fuzzy bounded operators is complete. finally, we define...

15 صفحه اول

extraction and acetylation of purified trypsin from bovin pancreas and study of some its physico-chemical properties

آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...

15 صفحه اول

application and construction of carbon paste modified electrodes developed for determination of metal ions in some real samples

ساخت الکترودهاِی اصلاح شده ِیکِی از چالشهاِی همِیشگِی در دانش شیمِی بوِیژه شیمِی تجزیه مِی باشد ،که با در نظر گرفتن سادگِی ساخت، کاربردی بودن و ارزان بودن روش مِی توان به باارزش بودن چنِین سنسورهاِی پِی برد.آنچه که در ادامه آورده شده به ساخت و کاربرد الکترودهاِی اصلاح شده با استفاده از نانو ذرات در اندازه گِیرِی ولتامترِی آهن وکادمِیم اشاره دارد. کار اول اختصاص دارد به ساخت الکترود خمِیر کربن اصلاح شده با لِیگاند داِ...

15 صفحه اول

modification of nanoclay for improving the physico-mechanical properties of dental adhesives

هدف اصلی این مطالعه تهیه یک سامانه نوین چسب عاجی دندانی بر پایه نانورس پیوند شده با پلی متاکریلیک اسید، نانورس پیوند شده با پلی اکریلیک اسید، مخلوط نانوسیلیکا و نانورس پیوند شده با پلی متاکریلیک اسید، مخلوط نانوسیلیکا و نانورس پیوند شده با پلی اکریلیک اسید و نانورس پیوند شده با کیتوسان اصلاح شده با گلایسیدیل متاکریلات است. پیوند پلی متاکریلیک اسید و پلی اکریلیک اسید بر ری سطح نانورس در حضور و ...

ذخیره در منابع من


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

download full

برای دسترسی به متن کامل این مقاله و 23 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
فرآوری و نگهداری مواد غذایی

جلد ۸، شماره ۱، صفحات ۱۲۵-۱۴۱

کلمات کلیدی
background and objectives: scolymus is one of most abundant plants of mountain areas iran because of role in the digestion of food auxiliary is located the focus of attention consumers. in iran more than 17 percent of crops in various stages of the supply becomes losses which requires knowledge of physical properties mechanical and hydrodynamic agricultural products. the existence of the information about the physical properties mechanical and hydrodynamic of scolymus can be widely used in the design of machines transfer separation hydraulic grading washing quality inspection maintenance and processing. because reduce crop losses and increase efficiency of operations to be processed scolymus.materials and methods: in this study some physical properties mechanical and hydrodynamic properties of scolymus were measured in three replications under standard conditions. the physical properties including length width thickness geometric and arithmetic mean diameter mass volume density sphericity surface area aspect ratio and moisture content on wet basis were measured. the mechanical properties of the samples when shear and bending (break) of scolymus from the middle of its length measured by instron machine zwick/roell under required standards. the hydrodynamic properties for the transfer sorting and grading of scolymus were carried by water.results: the physical properties of length width thickness mass volume and geometric mean diameter direct relationship and density (density) an inverse relation with the size of the scolymus. shape size volume surface and density are among the physical properties that are important in many issues related to the design of a specific machine or in analysis of obtained behaviors in transporting material. for mechanical properties in bending tested elastic modulus maximum force needed to bending scolymus work done to achieve maximum force needed to bending and deformation in order to apply maximum force respectively 0.00341 gpa 41.5 n 444.29 n.mm 18.91 mm and the shear test shear modulus the maximum force needed to shear scolymus shear strength shear deformation when applying maximum force were calculated respectively 0.002 n/mm2 82.9 n 0.0207 n/mm2 19.15 mm. information obtained from the mechanical properties of scolymus in shear test and bending can be used by scolymus processing factories. hydrodynamic properties of scolymus include the riseing time in the water column average limit speed and average flotation force exerted on scolymus in the water column was obtained respectively 4.67 s 0.02 m/s and 0.93 newton. the density of scolymus was lower than water and as a result it can be graded and transmitted hydraulically and without any harm.conclusion: the data obtained from this study can be used for design optimization process equipment transport sorting and packing of scolymus.

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2022