The kinetic model and temperature effect of Caulerpa Lentillifera drying process

2018 ◽  
Author(s):  
Amata Anantpinijwatna ◽  
Sitanan Nuntamongkol ◽  
Benjamaporn Tudkesorn ◽  
Orawan Sukchoy ◽  
Pawinee Deetae
Keyword(s):  
Kinetic Model ◽  
Temperature Effect ◽  
Drying Process ◽  
Caulerpa Lentillifera

scholarly journals Relaxation of ceramic tile stresses generated by fast drying: a kinetic model

2018 ◽  
Author(s):  
J. L. Amorós ◽  
V. Cantavella ◽  
E. Blasco
Keyword(s):  
Mechanical Properties ◽  
Stress Relaxation ◽  
Kinetic Model ◽  
Moisture Content ◽  
Mechanical Strength ◽  
Ceramic Tile ◽  
Drying Process ◽  
Ceramic Tiles ◽  
Relaxation Kinetic ◽  
Dry Conditions

Abstract Unfired tile mechanical properties are very important in the ceramic tile manufacturing process. Inadequate mechanical properties lead to rejects (both in unfired and fired tiles). Unfired tile mechanical strength changes significantly after the tiles exit the industrial dryer. This behaviour can be explained by assuming that the fast-drying process generates stresses in the tile, which subsequently relax. A kinetic model has been derived, based on Maxwell’s viscoelastic elements, which explains the development of dried tile mechanical strength. This increases asymptotically when the dried tiles are stored in dry conditions. However, if tiles adsorb humidity (upon exiting the dryer), tile mechanical strength rises and then decreases. This is the result of two opposing phenomena: stress relaxation raises mechanical strength while the concurrent rise in moisture content lowers mechanical strength. The developed model successfully describes this joint mechanical behaviour. Keywords: ceramic tiles, fast drying, stress relaxation, kinetic model

scholarly journals Hybrid fuzzy kinetic model of phosphorite pellets drying process

2020 ◽  
Vol 1553 ◽  
pp. 012014
Author(s):  
V Bobkov ◽  
V Borisov ◽  
Ya Fedulov
Keyword(s):  
Kinetic Model ◽  
Drying Process

scholarly journals Kinetic Model for Drying in Frame of Generalized Fractional Derivatives

2020 ◽  
Vol 4 (2) ◽  
pp. 17
Author(s):  
Ramazan Ozarslan ◽  
Erdal Bas
Keyword(s):  
Kinetic Model ◽  
Physical Meaning ◽  
Fractional Derivatives ◽  
Differential Operators ◽  
Drying Process ◽  
Caputo Fractional Derivatives ◽  
Fractional Models ◽  
Generalized Fractional Derivatives ◽  
Fractional Differential ◽  
Fractional Differential Operators

In this article, the Lewis model was considered for the soybean drying process by new fractional differential operators to analyze the estimated time in 50 ∘ C , 60 ∘ C , 70 ∘ C , and 80 ∘ C . Moreover, we used dimension parameters for the physical meaning of these fractional models within generalized and Caputo fractional derivatives. Results obtained with generalized fractional derivatives were analyzed comparatively with the Caputo fractional, integer order derivatives and Page model for the soybean drying process. All results for fractional derivatives are discussed and compared in detail.

scholarly journals Drying kinetics on mass reduction with natural operation of potatoes as simulation model

2021 ◽  
Vol 912 (1) ◽  
pp. 012067
Author(s):  
B Haryanto ◽  
M B Tarigan ◽  
T R F Sinuhaji ◽  
E A Tarigan ◽  
N A Br Sitepu
Keyword(s):  
Kinetic Model ◽  
Research Effort ◽  
Research Data ◽  
Mass Reduction ◽  
Drying Process ◽  
Percent Reduction ◽  
Natural Operation ◽  
Before And After ◽  
Coronavirus Infection ◽  
At Home

Abstract The increase in cases of coronavirus infection causes research to be carried out at home. This is due to the rapid mutation of the coronavirus. So far, WHO has confirmed 4 variants of the coronavirus. The research carried out this time is to make a kinetic model and the percent reduction in mass in potato samples by drying using sunlight as a form of research effort carried out at home. This drying has been done before and this time it is compared with previous research data. The results obtained are that there is a difference, namely the percent reduction in sample mass before and after drying. In the sample carried out this time, the percent mass reduction on the first day was very large, but when tested on the last day it was superior to the previous research, which means that the surface area of the sample accelerates the drying process.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

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