Effects of magnetic field on freezing characters of carrot, potato and broccoli

In order to study the effects of magnetic field on the freezing characteristics of fruits and vegetables, carrot, potato and broccoli were frozen without and with a magnetic field of intensities 4.6 Gs, 9.2 Gs, 18 Gs and 36 Gs, while recording the temperature changes. The microstructure and temperature change of carrot during freezing were analyzed in detail. The results show that the magnetic field has effects on the freezing process of carrot strips, characterized by a reduction of the phase transition time and a characteristic diversity of the ice crystal formation zone. Crystallization characteristics are similar in the samples without and with a magnetic field of low intensities (4.6 Gs and 9.2 Gs), which show as a non-homogeneous phase transition process in the carrot sample, and the tissue changed showing a sunken, cell morphology variation and increased intercellular space. The freezing is almost homogeneous under a magnetic field of intensities 18 Gs and 36 Gs, then results in a slightly change of cell morphology. In addition, the effects of magnetic field on fruits and vegetables are varying with their species.

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Effects of Magnetic Field on the Phase Change Cells and the Formation of Ice Crystals in Biomaterials: Carrot Case

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4035936 ◽

2017 ◽

Vol 9 (3) ◽

Cited By ~ 2

Author(s):

Bin Liu ◽

Jianfei Song ◽

Zhaodn Yao ◽

Rachid Bennacer

Keyword(s):

Magnetic Field ◽

Phase Transformation ◽

Phase Change ◽

Fruits And Vegetables ◽

Membrane Damage ◽

Optical Microscope ◽

Ice Crystals ◽

Control Panel ◽

Crystal Formation ◽

Ice Crystal

In order to explore the effect of direct current (DC) and alternating current (AC) magnetic field (MF) on the biological (fruits and vegetables) phase transformation and ice crystal formation, we used carrot strips (0.5 × 0.5 × 1 cm3) and put them at low temperature control panel. The samples were frozen under AC and DC MF of 50 Hz with different intensities, i.e., 0, 0.46, 0.9, 1.8, 3.6, and 7.2 mT. The ice crystals formation during the process of cell freezing was observed and recorded using the optical microscope, and the beginning and ending time of the phase transformation with the corresponding temperatures were determined. The results show that the DC and AC MF situations compared to non-MF can decrease ice crystal volume and be more flocculent. The changes will reduce the cell membrane damage rate. The increase of magnetic field intensity delays the phase change time and leads to a shorter phase transition duration, a reduction in the cells’s lowest noncrystallization temperature is also observed. Such changes in thermal dynamic process and size elementary freezing (rapid formation of small ice crystals) reduce the damage to the quality of fruits and vegetables.

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Water Mediates the Metastable Crystal-to-Stable Crystal Phase Transition Process in Phospholipid Aqueous Dispersion

The Journal of Physical Chemistry B ◽

10.1021/jp810820d ◽

2009 ◽

Vol 113 (4) ◽

pp. 869-872 ◽

Cited By ~ 10

Author(s):

Fu-Gen Wu ◽

Lin Chen ◽

Zhi-Wu Yu

Keyword(s):

Phase Transition ◽

Aqueous Dispersion ◽

Transition Process ◽

Crystal Phase ◽

Phase Transition Process ◽

Crystal Phase Transition

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The effect of Argon pressure dependent V thin film on the phase transition process of (020) VO2 thin film

Applied Surface Science ◽

10.1016/j.apsusc.2017.08.242 ◽

2018 ◽

Vol 427 ◽

pp. 304-311 ◽

Cited By ~ 9

Author(s):

Yifan Meng ◽

Kang Huang ◽

Zhou Tang ◽

Xiaofeng Xu ◽

Zhiyong Tan ◽

...

Keyword(s):

Thin Film ◽

Phase Transition ◽

Transition Process ◽

Argon Pressure ◽

Phase Transition Process

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Exploration of Doubly Thermal Phase Transition Process of PDEGA-b-PDMA-b-PVCL in Water

Langmuir ◽

10.1021/acs.langmuir.6b01785 ◽

2016 ◽

Vol 32 (26) ◽

pp. 6691-6700 ◽

Cited By ~ 13

Author(s):

Zhangxin Ye ◽

Youcheng Li ◽

Zesheng An ◽

Peiyi Wu

Keyword(s):

Phase Transition ◽

Transition Process ◽

Thermal Phase Transition ◽

Phase Transition Process ◽

Thermal Phase

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A New Lattice Boltzmann Model for Phase Transition Process

Volume 13: New Developments in Simulation Methods and Software for Engineering Applications; Safety Engineering, Risk Analysis and Reliability Methods; Transportation Systems ◽

10.1115/imece2009-10961 ◽

2009 ◽

Author(s):

Longjian Li ◽

Jianbang Zeng ◽

Quan Liao ◽

Wenzhi Cui

Keyword(s):

Phase Transition ◽

Lattice Boltzmann ◽

Equations Of State ◽

Density Ratio ◽

Transition Process ◽

Lattice Boltzmann Model ◽

New Model ◽

Phase Transition Process ◽

Simulation Results ◽

Boltzmann Model

A new lattice Boltzmann model, which is based on Shan-Chen (SC) model, is proposed to describe liquid-vapor phase transitions. The new model is validated through simulation of the one-component phase transition process. Compared with the simulation results of van der Waals fluid and the Maxwell equal-area construction, the results of new model are closer to the analytical solutions than those of SC model and Zhang model. Since the range of temperature and the maximum density ratio are increased, and the value of maximum spurious current is between those of SC and Zhang models, it is believed that this new model has better stability than SC and Zhang models. Therefore, the application scope of this new model is expanded. According to the principle of corresponding states in Engineering Thermodynamics, the simulations of water and ammonia phase transition process are implemented by using this new model with different equations of state. Compared to the experimental data of water and ammonia, the results show that the Peng-Robinson equation of state is more suitable to describe the water, ammonia and other substances phase transition process. Therefore, these simulation results have great significance for the real engineering applications.

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Influence of the surface layer on the phase transition process in an inhomogeneous medium with account of heat flux relaxation

Journal of Applied Mechanics and Technical Physics ◽

10.1007/bf02369781 ◽

1995 ◽

Vol 36 (3) ◽

pp. 422-427

Author(s):

N. V. Solov'ev ◽

A. V. Talonov

Keyword(s):

Phase Transition ◽

Heat Flux ◽

Surface Layer ◽

Inhomogeneous Medium ◽

Transition Process ◽

Phase Transition Process ◽

Flux Relaxation ◽

Heat Flux Relaxation

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CROSSOVER FROM RABI TO JOSEPHSON DYNAMICS IN TWO-COUPLED BOSE–EINSTEIN CONDENSATES AS A PHASE TRANSITION PROCESS

Modern Physics Letters B ◽

10.1142/s0217984902004640 ◽

2002 ◽

Vol 16 (27) ◽

pp. 1021-1026 ◽

Cited By ~ 3

Author(s):

ARANYABHUTI BHATTACHERJEE ◽

MAN MOHAN

Keyword(s):

Phase Transition ◽

Mean Field ◽

Perturbation Expansion ◽

Transition Process ◽

Field Energy ◽

Linear Perturbation ◽

Small Oscillations ◽

Phase Transition Process ◽

Tunneling Matrix Element ◽

Bose Einstein

Crossover from individual Rabi dynamics to collective Josephson dynamics in two-coupled Bose–Einstein condensates is studied as a phase transition process. We obtain the critical value of the parameter Λ (ratio of the mean field energy to the tunneling matrix element) for the π-phase oscillations from the non-linear perturbation expansion of small oscillations around the saddle point of the first-order Euclidean (imaginary time) differential equations for polar and azimuthal angles θ and ϕ without approximation.

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