scholarly journals Method for The Primary Processing of Silkworm Cocoons (Bombyx Mori)

2019 ◽  
Vol 9 (1) ◽  
pp. 4562-4565 ◽  
Keyword(s):  
Bombyx Mori ◽  
Elastic Waves ◽  
Raw Materials ◽  
Low Frequency ◽  
Ir Radiation ◽  
Primary Processing ◽  
Low Frequency Oscillations ◽  
Infrared Rays ◽  
Electromechanical Drive ◽  
Scale Test

The article discusses the results of an experimental study of the process of primary processing of silkworm cocoons (Bombyx mori). During the study, the possibilities of the primary processing of silkworm cocoons using elastic waves with infrared radiation were examined. The Tashkent State Technical University has developed a mechanism for generating low-frequency oscillations due to an electromechanical drive to pallets. In the laboratory of the department, a full-scale test was carried out for the primary processing of silkworm cocoons (Bombyx mori). Studies were carried out to determine the parameters as temperature and time of primary processing of silkworm cocoons in 5 times repetition. The results of the experiments are the primary processing of live cocoons (Bombyx mori) in the amount of one hundred pieces with infrared rays, the effects of vibration and elastic waves (the distance between the tube distributing infrared rays and raw materials is 10 cm, the duration of the process is 5 minutes). The study revealed that, as silkworm cocoons processed in the temperature range at 65-70 0С using vibration waves were moderate for 3-5 minutes and for 10 days at a temperature of 38-42 0С the cocoons continued to dry to 10-12% of the cane humidity. The use of elastic waves in the processing of cocoons proceeded 5-10% lower relative to the processing using vibratory waves. The obtained results, the experiments confirm that when applying vibration and IR radiation accelerates the process of primary processing of silkworm cocoons. The study found the optimum temperature and time for the primary processing of silkworm cocoons. Due to briefly temporary processing, the final product is improved.

scholarly journals METHOD FOR PRIMARY PROCESSING OF HERE SILKWORM COCOONS BY USING INFRARED RADIATION AND ELASTIC WAVES

2019 ◽  
Vol 2018 (3) ◽  
pp. 30-36
Author(s):  
J Safarov ◽  
◽  
Sh Sultanova ◽  
D Samandarov
Keyword(s):  
Experimental Study ◽  
Experimental Work ◽  
Elastic Waves ◽  
Initial Moisture Content ◽  
Summer Season ◽  
Processing Method ◽  
Full Scale Test ◽  
State Technical ◽  
Primary Processing ◽  
Scale Test

The article discusses the results of an experimental study of the primary processing of silkworm cocoons. In the laboratory of the department of Tashkent State Technical University a full-scale test was carried out for the primary processing of silkworm cocoons. Experimental work was carried out to pacify and dry the living cocoons of the silkworm of the duragay cultivar “MusaffoTola” grown during the summer season. Studies were carried out to determine parameters such as temperature and time of the primary processing of the silkworm in 5- fold repetition.The initial moisture content of live silkworm cocoons was 36–40%. According to the results of laboratory - experimental work, the appearance of mold was observed in 25-30% of processed cocoons of the silkworm, at 55-60 °C in 10 days a butterfly formed in 15-20% of the cocoons. The processed cocoons of the silkworm at a temperature of 75-85 °C deteriorated due to the release of liquid.It was revealed during observations that silkworm cocoons processed in the temperature range 65-70 °С using vibration waves were euthanized within 30 minutes and the cocoons were dried to 10-12% humidity within 10 days at a temperature of 38-42 °С. The use of elastic waves in the processing of cocoons proceeded 5-10% lower compared to the processing method using vibrational waves.

scholarly journals The intensification of dehydration process of pectin-containing raw materials

10.5219/1711 ◽  
2022 ◽  
Vol 16 ◽  
pp. 15-26
Author(s):  
Igor Palamarchuk ◽  
Oksana Zozulyak ◽  
Mikhailo Mushtruk ◽  
Ievgenii Petrychenko ◽  
Nataliia Slobodyanyuk ◽  
...  
Keyword(s):  
Raw Materials ◽  
Fixed Bed ◽  
Low Frequency ◽  
Moisture Diffusion ◽  
Convective Drying ◽  
Simultaneous Application ◽  
Low Frequency Oscillations ◽  
Mechanical Factors ◽  
Oscillating Motion ◽  
Kinetics Of

The process of intensifying dehydration of pectin-containing raw materials by using centrifugation with simultaneous application of low-frequency oscillations to the working container creates an electroosmotic effect in unilateral diffusion to improve the filtration process. It is established that to reduce the technological resistance in the presented methods; it is necessary to create a fluidized bed of products due to the oscillating motion of the working capacity. An experimental vibration unit has been developed to determine the rational parameters of the vibrocentric moisture removal process using the electroosmotic effect. It is proved that the complex of the designed equipment provides consecutive carrying out of three-stage vibration filtration-convective drying of high-moisture production by an alternation of action of a stream of the heat carrier, an electromagnetic field, low-frequency fluctuations. According to the research results, the dependences of the kinetics of the moisture diffusion process on the electric field strength are obtained; frequency of electric current and duty cycle of pulses, which allowed to optimize the process parameters according to the criteria of minimizing energy consumption. It was found that the processing time to achieve the desired humidity with the application of vibration, filtration, and electroosmotic effect was twice less than for filtration drying in a fixed bed. In combination with the noted physical and mechanical factors, the proposed technology improves the technical and economic parameters of the studied process.

scholarly journals Low-frequency oscillations in cortical level to help diagnose task-specific dystonia

2021 ◽  
pp. 105444
Author(s):  
Chun-Chuan Chen ◽  
Antonella Macerollo ◽  
Hoon-Ming Heng ◽  
Ming-Kuei Lu ◽  
Chon-Haw Tsai ◽  
...  
Keyword(s):  
Low Frequency ◽  
Cortical Level ◽  
Low Frequency Oscillations

scholarly journals Numerical Modelling and Optimization of Two-Dimensional Phononic Band Gaps in Elastic Metamaterials with Square Inclusions

2021 ◽  
Vol 11 (7) ◽  
pp. 3124
Author(s):  
Alya Alhammadi ◽  
Jin-You Lu ◽  
Mahra Almheiri ◽  
Fatima Alzaabi ◽  
Zineb Matouk ◽  
...  
Keyword(s):  
Elastic Wave ◽  
Tungsten Carbide ◽  
Composite Structure ◽  
Elastic Waves ◽  
Wave Attenuation ◽  
Low Frequency ◽  
Filling Fraction ◽  
Carbide Composite ◽  
Elastic Metamaterials ◽  
Tungsten Carbide Composite

A numerical simulation study on elastic wave propagation of a phononic composite structure consisting of epoxy and tungsten carbide is presented for low-frequency elastic wave attenuation applications. The calculated dispersion curves of the epoxy/tungsten carbide composite show that the propagation of elastic waves is prohibited inside the periodic structure over a frequency range. To achieve a wide bandgap, the elastic composite structure can be optimized by changing its dimensions and arrangement, including size, number, and rotation angle of square inclusions. The simulation results show that increasing the number of inclusions and the filling fraction of the unit cell significantly broaden the phononic bandgap compared to other geometric tunings. Additionally, a nonmonotonic relationship between the bandwidth and filling fraction of the composite was found, and this relationship results from spacing among inclusions and inclusion sizes causing different effects on Bragg scatterings and localized resonances of elastic waves. Moreover, the calculated transmission spectra of the epoxy/tungsten carbide composite structure verify its low-frequency bandgap behavior.

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