Effect of open-air and hot-air oven drying on interparticle bonding of iron ore agglomerates

2021 ◽  
pp. 1-10
Author(s):  
Rishi Sharma ◽  
D. S. Nimaje
Keyword(s):  
Iron Ore ◽  
Oven Drying ◽  
Hot Air ◽  
Interparticle Bonding

Effect of drying methods on the nutritional content and In- vitro Antioxidant capacity of Chenopodium album L. and Spinacia oleracea L.

2021 ◽  
pp. 4361-4366
Author(s):  
Sonia Singh ◽  
Neetu Agrawal
Keyword(s):  
Spinacia Oleracea ◽  
Chenopodium Album ◽  
Microwave Drying ◽  
Total Phenolic ◽  
Drying Methods ◽  
Drying Method ◽  
Nutrient Quality ◽  
Oven Drying ◽  
Sun Drying ◽  
Hot Air

The herbs, Chenopodium album Linn. and Spinacia oleracea Linn. belongs to Chenopodiaceae family, are the two nutritious and edible green leafy food crops, abundantly found especially in the northern-west region of India. These plants have gained renown popularity, because of their high nutritional content including protein, amino acids, carbohydrate, and even the presence of phenolic components, which ultimately may get affected with drying and storage techniques. Impact of different drying methods (microwave drying at 4 minutes, hot air oven drying at 5 hours and sun drying at 8-10 hours) on nutrient quality and antioxidant property of Chenopodium album Linn. and Spinacia oleracea Linn. leaves were evaluated by using UV spectrophotometritc assay, total phenolic content and DPPH free radical scavenger method. Drying treatments were significantly decreased the moisture, carbohydrate and protein content present in C.album and S. oleracea. Hot air oven drying method produced dried samples of C.album and S. oleracea had significantly similar antioxidant activity when compared with the samples obtained from sun drying method. The dried samples obtained from hot air oven drying technique showed significant presence of total phenolic content in C. album and S. oleracea (6.44±0.12 mg/g, 6.69±0.40 mg/g) whilst the traditional sun drying method produced 8.00±0.02 mg/g and 7.89±0.37 mg/g). It is concluded that microwave drying and hot air oven drying were the methods to preserve appreciable percentage of nutrient components compared to the fresh samples. On other hand, the traditional method produced substantial reduction of nutrient quality. From statistical analysis, hot air oven drying technique was considered as optimum method which showed satisfactory % retention of protein (65.86%) and carbohydrate (85.95%) at 5 hours (shorter time than sun drying time period) along with significant antioxidant activity (34.89 μg/mL and 35.60 μg/mL) similar as obtained from the traditional technique (32.00 μg/mL).

The Effect of Cooking and Drying on the Water-Soluble Vitamins Content of Bulgur

2007 ◽  
Vol 13 (5) ◽  
pp. 349-354 ◽  
Author(s):  
Ç. Kadakal ◽  
R. Ekinci ◽  
A. Yapar
Keyword(s):  
Water Soluble ◽  
Vitamin B ◽  
Oven Drying ◽  
Sun Drying ◽  
Whole Wheat ◽  
Hot Air ◽  
Cooking Temperature ◽  
Wheat Product

Bulgur is a whole-wheat product cooked, dried, cracked, and sifted for sizing. This paper, evaluated the effect of cooking in beaker (90 and 100°C) and in autoclave at 121°C for 17min and drying in a hot-air oven (60, 70, and 80°C) or sun-drying in open air, on the content of several water-soluble vitamins [thiamin (vitamin B 1), niacin, panthothenic acid (vitamin B5), pyridoxine (vitamin B6), and riboflavin (vitamin B2)]. The content of water-soluble vitamins was analyzed by HPLC. Both cooking and drying had a significant effect ( p<0.05) on the content of water-soluble vitamins of bulgur. The cooking in autoclave resulted in a more significant decrease on the thiamin, niacin, panthothenic acid, pyridoxine, and riboflavin content of the samples, when compared with cooking at 90 and 100°C. As the cooking temperature increases, the concentrations of water-soluble vitamins in the samples decreased. The decrease in water-soluble vitamins was higher with open-air sun drying than with hot-air oven drying at 60, 70, and 80°C.

scholarly journals Qualitative Traits of Dry Rose Flowers ‘Taj Mahal’ as Influenced by Dehydration Methods

2021 ◽  
pp. 173-182
Author(s):  
M. Narjinary ◽  
Arpita Mandal Khan ◽  
S. Maitra ◽  
I. Sarkar ◽  
P. K. Pal
Keyword(s):  
Silica Gel ◽  
Room Temperature ◽  
Power Level ◽  
Microwave Oven ◽  
Carotenoid Content ◽  
Oven Drying ◽  
Hot Air ◽  
Sensory Score ◽  
Taj Mahal

Aims: To optimize drying technique for the popular Dutch rose cultivar, Taj Mahal, by evaluating different drying methods and appraising the physical, biochemical and sensory quality of the product. Study Design: Completely Randomized Design. Place and Duration of Study: Department of Floriculture, Medicinal and Aromatic Plants, Faculty of Horticulture, Uttar Banga Krishi Viswavidyalaya, during 2019-2020 Methodology: Flowers of rose cultivar ‘Taj Mahal’, at their prime beauty i.e., half-opened bud stage, were subjected to embedded drying in silica gel at six different conditions viz. at room temperature (T1), in hot air oven at 45°C, (T2) and at 60°C, (T3) in micro-wave oven at 100% power level (T4), 80% power level (T5) and at 60% power level (T6). The quality of the ensuing dehydrated flowers was judged with respect to colour, weight, volume shrinkage and anthocyanin and carotenoid contents. Temperature during drying and time to reach optimum dehydrated condition under different drying techniques were recorded. Sensory evaluation for the quality of the products was done after six months of storage. Results: The time taken for optimum drying ranged from 120 hours in case of room temperature drying (25.1°C) to 3 minutes in microwave oven on high power i.e., 100% (130.4°C). Significant variation in final weight of the product was recorded between 18.34% to 28% of the fresh weight. Minimum shrinkage (42.85%) was noted in room drying (T1) and hot air oven drying at 60°C (43.53%). Maximum anthocyanin concentration (3.528 mg/g) was recorded in flowers dried at room temperature, whereas, minimum among the dried flowers, was recorded in microwave oven drying at 100% power level (1.439 mg/g). Maximum Carotenoid content (16.780 µg/g) was recorded in flowers dried in hot air oven at 45°C. Out of six treatments in the present study, maximum sensory score (30.38 out of 36) was gathered by T2, which was at par with T1 and T5. Conclusion: Dehydrating ‘Taj Mahal’ rose flowers by embedding in silica gel and drying under room temperature (25°C) for 120 hours or hot air oven at 45°C for 27.5 hours or microwave oven at 80% power level for 3.5 minutes can be recommended for commercial dry flower production.

scholarly journals DRYING TECHNIQUES OF SOME SELECTED ORNAMENTAL FLOWERS-A REVIEWS

2021 ◽  
pp. 180-186
Author(s):  
Prexa Rathod ◽  
Milan Vala ◽  
Bharat Maitreya
Keyword(s):  
Freeze Drying ◽  
Size Structure ◽  
Microwave Oven ◽  
Air Drying ◽  
Oven Drying ◽  
Handmade Paper ◽  
Hot Air ◽  
Drying Techniques ◽  
Different Types ◽  
African Marigold

Drying of flowers is the method of maintenance of flowers or removing water and moisture. Dehydration is most important for getting dry flowers. There are Many different types of methods use for removing moisture contain from flowers are air drying, embedded (sand, borax, silica gel, and other materials) press drying, freeze drying, microwave oven drying, hot air oven drying, Glycerin drying, freeze drying. Chrysanthemum is one of the most widely cultivated garden flowers and ranks popularity. The Chrysanthemum flower has fully double flowers with flat petals and the central disc is generally absent. Many of the commonly grown marigolds are cultivars of African and French marigolds. Flower petals of African marigold are the best source of carotene for coloring foodstuffs. From the dried flowers varied manufacture are made and use like petal embedded handmade paper, press dried flower products, candle making, pot pourri, floral jewelry etc. This dried plants and flowers materials also used in industry. For chrysanthemum embedded drying is the best in which flower shape, size, structure, colour are maintained and for marigold microwave and air drying techniques are best in size, colour, shape, colour are maintained. KEYWORDS: Drying Techniques, Chrysanthemum, marigold, embedded, microwave

Effect of embedding media, temperature and durations on hot air oven drying of Rose (Rosa hybrida L.) cv. ‘First Red’

2011 ◽  
Vol 4 (1) ◽  
pp. 233-239
Author(s):  
B.S. Dilta B.S. Dilta ◽  
◽  
Tushar Bala Behera ◽  
Y. C. Gupta Y. C. Gupta ◽  
R. Bhalla R. Bhalla ◽  
...  
Keyword(s):  
Rosa Hybrida ◽  
Oven Drying ◽  
Hot Air

Studies on hot air oven drying of chincherinchee(Ornithogalum thyrsoidesJacq.)

2016 ◽  
Vol 7 (1) ◽  
pp. 52
Author(s):  
Gitam Sharma ◽  
Bharati Kashyap ◽  
BP Sharma ◽  
YC Gupta ◽  
Rakesh Gupta
Keyword(s):  
Oven Drying ◽  
Hot Air

scholarly journals Microwave Drying of Granules Containing a Moisture-Sensitive Drug: A Promising Alternative to Fluid Bed and Hot Air Oven Drying

2005 ◽  
Vol 53 (7) ◽  
pp. 770-775 ◽  
Author(s):  
Sze Nam Chee ◽  
Anne Lene Johansen ◽  
Li Gu ◽  
Jan Karlsen ◽  
Paul Wan Sia Heng
Keyword(s):  
Microwave Drying ◽  
Promising Alternative ◽  
Oven Drying ◽  
Hot Air ◽  
Fluid Bed ◽  
Moisture Sensitive

scholarly journals PERANCANGAN HOT AIR BLOWER PADA CONVEYOR 403-V UNTUK MENCEGAH PENGGUMPALAN IRON ORE PELLET (IOP) PADA DAYBIN 404-F

Bina Teknika ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 39
Author(s):  
Nur Cholis ◽  
Yosua Sebastian ◽  
Fariz Hilman Fauzan ◽  
M. Fathuraman Pringgatama
Keyword(s):  
Iron Ore ◽  
Hot Air ◽  
Iron Ore Pellet ◽  
Air Blower

scholarly journals DEVELOPMENT OF DRYING PROTOCOL FOR WITHANIA SOMNIFERA ROOTS

2018 ◽  
Vol 11 (10) ◽  
pp. 86
Author(s):  
Soni S ◽  
Himmat Singh Chawra ◽  
Sharma Rk ◽  
Garg R
Keyword(s):  
Medicinal Plants ◽  
Moisture Content ◽  
Withania Somnifera ◽  
Alkaloid Content ◽  
Research Organization ◽  
Drying Method ◽  
Oven Drying ◽  
Sun Drying ◽  
Hot Air ◽  
Withanolide A

Objective: This experiment was conducted to develop a drying protocol for Withania somnifera roots (during the year 2009–2010 under the National Medicinal Plants Board project, B.R. Nahata College of Pharmacy-Scientific Institute of Research Organization, Mandsaur [M.P.]).Methods: The roots of Withania were harvested and cut into different sizes (2–4 inches) and subjected into sun drying, shade drying, and hot air oven drying in temperature ranging from 40°C to 60°C. The temperature for sun drying ranging from 32°C to 42°C during daytime, and in night hours, the samples were kept in plastic covers to prevent reabsorption of moisture. In shade drying, the pieces of roots were kept in shade (proper air flowing place) at normal climatic temperature. Moreover, in hot air oven drying method/mechanical drying method, the pieces of roots were kept at 50°C, 55°C, and 60°C, respectively. The samples were weighed, and the moisture content of the samples was taken at regular intervals until the standard moisture content of the dried roots was obtained that is mentioned in literature (10–5%).Result: The result revealed that hot air oven drying of roots took the lowest time (12 h), while sun drying method took 24 h for drying. The alkaloid content, namely, Withanolide A was significantly influenced by different methods of drying. The highest alkaloid content (0.010%) was observed in sun drying and hot air oven drying with 0.021.abc% as compared to shade drying with 0.009% Withanolide A.Conclusion: It may be concluded that sun drying and hot air oven drying are suitable methods for drying W. somnifera roots.

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