influence of agitation speed and water temperature on dried squash (cucurbita pepo) properties during its rehydration process
نویسندگان
چکیده
throughout the present research, squash (cucurbita pepo) slices (0.4 cm thickness and 4 cm diameter) were blanched in a steam chamber for 4 min. following cooling to room temperature, the squash slices were dehydrated by use of a hotair dryer, under air temperature of 60°c up to moisture content of 0.1065 kg h2o per kg d.m. squash slices of specified weights were rehydrated by immersion in distilled water at different temperatures (25, 50, and 75°c). they were agitated at different speeds (0,100, and 200 rpm). for any of the experiments, the dry matter to water ratio was kept at 1:25. the squash samples were removed from water at specified time intervals of up to 300 min. then their weight, dry matter content and water absorption content (in percent) were determined. the squash slice color was examined over a 180 min period. the results showed thatrehydration time, water temperatureand agitation speed had significant effects (p˂0.01) on dry matter content, water absorption (percent) and color indices (l*, a*, b*, and δe) in the dried squash slices. water absorption percent and total color difference (δe) of squash slices increased, whereas dry matter content and color indices (a*, b*, and l*) decreased with rehydration time. maximum water absorption and δe, minimum dry matter content as well as color indices (a*, b*, and l*), were observed in squash slices rehydrated into 75°c water and agitated at 200 rpm.
منابع مشابه
determination of rehydration amounts and texture properties of dried squash (cucurbita pepo) at different temperatures and agitator speeds
0
متن کاملl-Ornithine:2-Oxoacid Aminotransferase from Squash (Cucurbita pepo, L.) Cotyledons: Purification and Properties.
ORNITHINE: 2-oxoacid aminotransferase (EC 2.6.1.13) has been purified over 400-fold with a total recovery of 14% from acetone powders of cotyledons of germinating squash (Cucurbita pepo, L.) seedlings. The pH optimum of the transamination between l-ornithine and alpha-ketoglutarate is 8 and the Michaelis constants are 4.7 mm and 6.3 mm, respectively. The enzyme has a molecular weight of 48,000 ...
متن کاملEffect of Time and Temperature on Moisture Content, Shrinkage, and Rehydration of Dried Onion
In this paper, the experimental data of the onion drying process by a batch cabinet dryer is investigated. Obtained experimental...
متن کاملMovement of Soil-Applied Imidacloprid and Thiamethoxam into Nectar and Pollen of Squash (Cucurbita pepo)
There has been recent interest in the threat to bees posed by the use of systemic insecticides. One concern is that systemic insecticides may translocate from the soil into pollen and nectar of plants, where they would be ingested by pollinators. This paper reports on the movement of two such systemic neonicotinoid insecticides, imidacloprid and thiamethoxam, into the pollen and nectar of flowe...
متن کاملActivity of b-Galactosidase and Polygalacturonase in Zucchini Squash (Cucurbita pepo L.) Stored at Low Temperatures
René Renato Balandrán-Quintana1, Ana María Mendoza-Wilson2, Irasema Vargas-Arispuro2 and Miguel Angel Martínez-Téllez2* Universidad Autónoma de Chihuahua, Facultad de Ciencias Químicas, Ciudad Universitaria s/n, A.P. 1542-C Chihuahua, Chihuahua, México Centro de Investigación en Alimentación y Desarrollo, A.C., Coordinación de Tecnología de Alimentos de Origen Vegetal, Km 0.6, Carretera a La Vi...
متن کاملReview of Cucurbita pepo (Pumpkin) its Phytochemistry and Pharmacology
Abstract Cucurbita pepo, is widely used like food and in folk medicine around of the world. This aims a comprehensive of the pharmacological, chemical constituents, and clinical uses. Also have been identified the medicinally important phyto-constituents belonging mainly to cucurbitosides, multiflorane-type triterpenoids, carotenoids, ent-kauranetype diterpene, and cucurbitaglycosides. Extracts...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
مهندسی بیوسیستم ایرانجلد ۴۵، شماره ۲، صفحات ۸۹-۹۶
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023