Effect of drying temperature and drying method on drying rate and bioactive compounds in cassumunar ginger (Zingiber montanum)

2020 ◽  
Vol 18 ◽  
pp. 100262
Author(s):  
Busarakorn Mahayothee ◽  
Thipharat Thamsala ◽  
Pramote Khuwijitjaru ◽  
Serm Janjai
Keyword(s):  
Bioactive Compounds ◽  
Drying Rate ◽  
Drying Method ◽  
Drying Temperature

Sun Drying and Far-Infrared Drying Characteristics of Lily

2021 ◽  
Author(s):  
Pei Yang ◽  
Dan Huang ◽  
Sisi Lv ◽  
Ruiqi Wang ◽  
S. A. Sherif ◽  
...  
Keyword(s):  
Far Infrared ◽  
Drying Rate ◽  
Drying Method ◽  
Drying Time ◽  
Drying Characteristics ◽  
Drying Temperature ◽  
Nutrient Contents ◽  
Infrared Drying ◽  
Sun Drying ◽  
Pretreatment Time

Abstract The sun drying and far-infrared drying characteristics of lily were experimentally investigated. Fresh lily was blanched and treated with boiling water at 100 °C before drying. The effects of blanching time, drying method and drying temperature on drying rate, nutrient contents (total phenol, total flavonoid and starch contents), hardness and color were analyzed. The results showed that fresh lily without blanching pretreatment had deep browning color, wrinkled skin and long drying time under any drying temperature and drying method. However, the drying rate of samples with blanching pretreatment was significantly increased and the drying time was shortened. The drying rate of solar drying was much lower than that of infrared drying, however the drying quality is better. With the increase of blanching time, the browning degree and the nutrient contents under both drying methods were reduced, while the foaming rate was increased. The hardness after solar drying was moderate, while the hardness of far-infrared drying gradually increased with the increase of drying temperature. The blanching time of 4–6 min was the ideal pretreatment time. Under this pretreatment time, a sample with fair color and moderate hardness and nutrient contents can be obtained under the far-infrared drying temperature of 60–90 °C. The far-infrared drying was more suitable than the sun drying and the most suitable drying process was as follows: fresh lilies were blanched at 100 °C for 5 minutes, and then dried at 70°C for 7.5 hours.

The Potential Migrated Mechanism of Water-Soluble Components in Pellets Prepared by Wet Extrusion/Spheronization: Effect of Drying Rate

2020 ◽  
Vol 17 ◽  
Author(s):  
Bingwei Wang ◽  
Jianping Liu ◽  
Zhenghua Li ◽  
Yulong Xia ◽  
Shuangshuang Zhang ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Water Soluble ◽  
In Vitro Dissolution ◽  
Drying Rate ◽  
Scanning Calorimetry ◽  
Drying Temperature ◽  
Wet Extrusion ◽  
Extrusion Spheronization ◽  
Soluble Components

Background: At present, there were numerous researches on the migration of components in tablets and granules, the investigation in the pharmaceutical literatrue concerning the effect of drying rate on the migration of water-soluble components of pellets was limited. Temperature and relative humidity (RH) were crucial parameters during the drying process which was an essential step in the preparation of pellets via wet extrusion/spheronization. To quantify these variables, the water loss percentage of pellets per minute was defined as drying rate. Objective: The study aimed to investigate the influence of drying rate on the migration of water-soluble components in wet pellets and the potential migrated mechanism. Methods: The pellets containing tartrazine as a water-soluble model drug and microcrystalline cellulose as a matrix former were prepared by extrusion/spheronization and dried at four different drying temperature and relative humidity. Afterward, the extent of migrated tartrazine was assessed regarding appearance, in-vitro dissolution test, Differential Scanning Calorimetry, X-Ray Powder Diffraction, Attenuated total reflectance Fourier transform infrared spectroscopy and Confocal Raman Mapping. Results: Results demonstrated that red spots of tartrazine appeared on the surface of pellets and more than 40% tartrazine were burst released within 5 minutes when pellets dried at 60℃/RH 10%. While pellets dried at 40℃/RH 80%, none of these aforementioned phenomena was observed. Conclusion: In conclusion, the faster drying rate was, the more tartrazine migrated to the exterior of pellets. Adjusting drying temperature and relative humidity appropriately could inhibit the migration of water-soluble components within wet extrusion/spheronization pellets.

scholarly journals Preparation of LiFePO4 Powders by Ultrasonic Spray Drying Method and Their Memory Effect

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3193
Author(s):  
Tu Lan ◽  
Xiaolong Guo ◽  
De Li ◽  
Yong Chen
Keyword(s):  
Spray Drying ◽  
Memory Effect ◽  
Electrode Materials ◽  
Average Particle Size ◽  
Lithium Ion ◽  
Average Particle ◽  
Preparation Process ◽  
Drying Method ◽  
Drying Temperature ◽  
Ultrasonic Spray

The memory effect of lithium-ion batteries (LIBs) was first discovered in LiFePO4, but its origin and dependence are still not clear, which is essential for regulating the memory effect. In this paper, a home-made spray drying device was used to successfully synthesize LiFePO4 with an average particle size of about 1 μm, and we studied the influence of spray drying temperature on the memory effect of LiFePO4 in LIBs. The results showed that the increasing of spray drying temperature made the memory effect of LiFePO4 strengthen from 1.3 mV to 2.9 mV, while the capacity decreased by approximately 6%. The XRD refinement and FTIR spectra indicate that the enhancement of memory effect can be attributed to the increment of Li–Fe dislocations. This work reveals the dependence of memory effect of LiFePO4 on spray drying temperature, which will guide us to optimize the preparation process of electrode materials and improve the management system of LIBs.

Synthesis of Silica Aerogel Using Silica Sol by Ambient Drying Method

2017 ◽  
Vol 726 ◽  
pp. 199-203 ◽  
Author(s):  
Da Sun ◽  
Xue Ye Sui ◽  
Chang Ling Zhou ◽  
Nai Hong Han ◽  
Fu Tian Liu
Keyword(s):  
Pore Volume ◽  
Silica Aerogel ◽  
Normal Pressure ◽  
Silica Sol ◽  
Raw Material ◽  
Drying Method ◽  
Gel Time ◽  
Drying Temperature ◽  
Average Size ◽  
20 Nm

In this experiment, silica sol was used as raw material, the mixture of ammonium chloride and ammonia was used as coagulant. After replacing the solvent with n-hexane, silica aerogel was obtained under the condition of normal pressure. The influence of sol pH and coagulating temperature on the gel time was studied. According to the SEM photographs, the influence of drying temperature from 30 °C to 60 °C on the microstructure of silica aerogel was analyzed. This study showed that when sol pH was 6.5, coagulating temperature was 80 °C and the concentration of ammonia was 0.4 mol/L, the gel time was the shortest. The average size of silica aerogel particles was 10-20 nm, the average size of apertures was 20-50 nm. When the drying temperature was 40 °C, the specific surface area was 402.41 m2/g, the pore volume was 2.33 cm3/g, the density was 0.18 g/cm3.

scholarly journals Effect of Hot Air Thin Layer Drying Temperature on Physicochemical and Textural Properties of Dried Horseradish

2019 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Pranabendu Mitra ◽  
Md. Abdul Alim ◽  
Venkatesh Meda
Keyword(s):  
Textural Properties ◽  
Drying Method ◽  
Rehydration Ratio ◽  
Hot Air Drying ◽  
Air Drying ◽  
Medicinal Uses ◽  
Drying Temperature ◽  
Hot Air ◽  
Thin Layer Drying

The horseradish (Armoracia rusticana) is an important crop as ingredients for many commercial food products and medicinal uses. However, the horseradish is perishable and preservation of this crop for supplying year-round is necessary. Drying can be used to preserve the horseradish but establishing a suitable drying method and conditions are important for product quality of dried horseradish. The objective of this study was to investigate the effects of hot air-drying temperatures on the physicochemical and textural properties of dried horseradish samples to determine the appropriate hot air-drying conditions. The sliced horseradish samples were dried at 55, 65, 75, 85 and 95 ℃ using a conventional hot air drier. The physicochemical and textural properties of the dried horseradish samples were determined, and the results were compared for different drying temperatures. The ANOVA analysis indicated that the drying temperature affected the physicochemical and textural properties of dried horseradish samples significantly (p<0.05). The experimental results indicated that the moisture content (9.18-6.15%,wb), aw (0.06-0.03), porosity (31.47-12.13%) and rehydration ratio (82.74 -44.47%) decreased and piece density (0.63-0.84 g/mL), hardness (193.63 -298.31N), cohesiveness (1.04-1.32), gumminess (202.13-390.12) and chewiness (635.08-1223.55) of dried horseradish samples increased with the drying temperature. Power law model indicated that the porosity was linearly corelated to the rehydration ratio of dried horseradish samples. The overall results revealed that relatively lower (55-65 ℃) drying temperature range was suitable to keep the quality of the dried horseradish samples. The findings of this study are expected to be helpful for the commercial drying of horseradish samples using hot air-drying method.

Effect of Drying on Degradation kinetics of carotenoids and color of tomato pulp

2012 ◽  
Vol 8 (3) ◽  
Author(s):  
Indu Parmar ◽  
Gurpreet Kaur Chandi ◽  
Kalika Gupta ◽  
Balmeet Singh Gill
Keyword(s):  
Rate Constant ◽  
Color Change ◽  
Degradation Kinetics ◽  
Drying Rate ◽  
Drying Temperature ◽  
Hot Air ◽  
Visual Color ◽  
Tomato Pulp ◽  
Drying Conditions ◽  
Kinetics Of

Abstract Tomato pulp was dried under various drying conditions using hot air oven (65-950C), and cabinet drier (65-950C). The drying rate constant increased with increase in drying temperature. Among different combinations of Hunter L, a and b parameters, L*a could be used to describe the visual color change in tomato pulp during dehudration process.

Drying Characteristics of Graininess Agar under Infrared Ray and its Kinetics Model

2013 ◽  
Vol 663 ◽  
pp. 291-296
Author(s):  
Lei Yang ◽  
Qian Qian Ouyang ◽  
Si Dong Li
Keyword(s):  
High Efficiency ◽  
Linear Regression Analysis ◽  
Drying Rate ◽  
Analysis Program ◽  
Drying Method ◽  
Drying Characteristics ◽  
Low Energy Consumption ◽  
Different Temperatures ◽  
Drying Models ◽  
Drying Rates

In order to look for a low-energy–consumption and high-efficiency drying method, the drying characteristics of agar under infrared ray were studied. The results show that temperature has more obvious influence than granularity on the drying rate of agar. With the increase of temperature, the drying rate increases. The agar granularity does not have a significant influence on the drying rate. Comparisons of different drying models at different temperatures were made through linear regression analysis program. The results show that the drying procedure of agar under infrared ray can accurately be described by the Page model, and the drying rates and moisture contents at different drying stages can also be easily estimated with it.

Study of Fluidized Bed Drying Method Used For Safe Storage of Rice And Its Analyais

2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Rakesh Verma ◽  
Bharat Raj Singh
Keyword(s):  
Fluidized Bed ◽  
Air Temperature ◽  
Flow Rate ◽  
Material Flow ◽  
Rice Production ◽  
Rice Starch ◽  
Drying Rate ◽  
Drying Method ◽  
Safe Storage ◽  
Fluidized Bed Drying

Rice is used as a staple food by more than 60 percent of world population. The method used for Cooking of rice for eating purpose is most common and popular. Rice starch is used in making ice cream, custard powder, puddings, gel, distillation of potable alcohol, etc. It is used in confectionery products like bread, snacks, cookies and biscuits. The defatted bran is also used as cattle feed, organic fertilizer (compost), and medicinal purpose and in wax making. Rice is used as animal feed, fuel, mushroom bed, for mulching in horticultural crops and in preparation of paper and compost. Rice yields have been increasing since the 1960s, but since the 1990s, growth in rice production has been slower than population growth. Indeed, it is anticipated that rice production will need to increase by 30% by 2025 in order to sustain those who need it for sustenance. In the present work fluidized bed drying method used for safe storage of rice and analysis of rice conditions and we find that inlet air temperature has the most important effect on the drying rate of material, increasing the inlet air temperature increases the drying rate of the material. Inlet material flow rate has the most important effect on thermal efficiency. Increasing the inlet material flow rate increases the efficiency but decreases the drying rate. At lower flow rate of material, efficiency is low.

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