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2. Meso-mechanics simulation analysis of microwave-assisted mineral liberation

Author

Qin Like, Dai Jun, and Yuan Liqun

Subjects
Microwave heating, Assisted liberation, Meso-mechanics simulation, Irradiation time, Energy consumption, Mechanical engineering and machinery, TJ1-1570, Structural engineering (General), TA630-695
Abstract

Microwave-assisted crushing and grinding can improve efficiency and reduce energy consumption. This paper takes rock grains with galena and calcite as the research object to establish a two-dimensional computational model through the finite difference software FLAC2D. It analyzes the process and law of mineral boundary failure under microwave irradiation, and assesses the effects of four factors, namely, microwave irradiation time, power density, mineral crystal size, and mineral content, on mineral boundary failure. Results indicate an optimal microwave irradiation period for the rapid failure of mineral boundary. Moreover, irradiation time and energy consumption can be reduced by increasing the microwave power density. However, irradiation time and energy consumption are basically unchanged when the microwave power density is above a certain threshold. Mineral content slightly affects the microwave irradiation time, whereas mineral crystal size significantly affects the microwave irradiation time. In addition, a larger-sized mineral crystal requires less irradiation time and energy consumption to reach the same failure rate. However, irradiation time and energy consumption slightly change when the crystal size is larger than a certain value

Published
2015
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6. Meso-mechanics simulation analysis of microwave-assisted mineral liberation

Author

Dai Jun, Qin Like, and Yuan Liqun

Subjects
Materials science, lcsh:Mechanical engineering and machinery, lcsh:TA630-695, Mineralogy, engineering.material, Microwave assisted, Physics::Geophysics, Crystal, chemistry.chemical_compound, Galena, lcsh:TJ1-1570, Composite material, Power density, Calcite, Mineral, Assisted liberation, Mechanical Engineering, Meso-mechanics simulation, Energy consumption, lcsh:Structural engineering (General), Irradiation time, Grinding, chemistry, Mechanics of Materials, Microwave heating, engineering
Abstract

Microwave-assisted crushing and grinding can improve efficiency and reduce energy consumption. This paper takes rock grains with galena and calcite as the research object to establish a two-dimensional computational model through the finite difference software FLAC2D. It analyzes the process and law of mineral boundary failure under microwave irradiation, and assesses the effects of four factors, namely, microwave irradiation time, power density, mineral crystal size, and mineral content, on mineral boundary failure. Results indicate an optimal microwave irradiation period for the rapid failure of mineral boundary. Moreover, irradiation time and energy consumption can be reduced by increasing the microwave power density. However, irradiation time and energy consumption are basically unchanged when the microwave power density is above a certain threshold. Mineral content slightly affects the microwave irradiation time, whereas mineral crystal size significantly affects the microwave irradiation time. In addition, a larger-sized mineral crystal requires less irradiation time and energy consumption to reach the same failure rate. However, irradiation time and energy consumption slightly change when the crystal size is larger than a certain value.

Published
2015

8. The Drosophila neurogenin Tap functionally interacts with the Wnt-PCP pathway to regulate neuronal extension and guidance.

Author

Yuan, Liqun, Hu, Shu, Okray, Zeynep, Ren, Xi, De Geest, Natalie, Claeys, Annelies, Yan, Jiekun, Bellefroid, Eric, Hassan, Bassem A, Quan, Xiao-Jiang, Yuan, Liqun, Hu, Shu, Okray, Zeynep, Ren, Xi, De Geest, Natalie, Claeys, Annelies, Yan, Jiekun, Bellefroid, Eric, Hassan, Bassem A, and Quan, Xiao-Jiang

Abstract

The neurogenin (Ngn) transcription factors control early neurogenesis and neurite outgrowth in mammalian cortex. In contrast to their proneural activity, their function in neurite growth is poorly understood. Drosophila has a single predicted Ngn homolog, Tap, of unknown function. Here we show that Tap is not a proneural protein in Drosophila but is required for proper axonal growth and guidance of neurons of the mushroom body, a neuropile required for associative learning and memory. Genetic and expression analyses suggest that Tap inhibits excessive axonal growth by fine regulation of the levels of the Wnt signaling adaptor protein Dishevelled., info:eu-repo/semantics/published

Published
2016

11. Neural control of respiration

Author

Yuan, Liqun, Physiology and Pharmacology, Faculty of Medicine, UNSW and Yuan, Liqun, Physiology and Pharmacology, Faculty of Medicine, UNSW

Published
1993

12. The Drosophila neurogenin Tap functionally interacts with the Wnt-PCP pathway to regulate neuronal extension and guidance.

Author

Yuan L, Hu S, Okray Z, Ren X, De Geest N, Claeys A, Yan J, Bellefroid E, Hassan BA, and Quan XJ

Subjects
Adaptor Proteins, Signal Transducing genetics, Adaptor Proteins, Signal Transducing metabolism, Animals, Axon Guidance genetics, Axon Guidance physiology, Axons metabolism, Cell Polarity genetics, Drosophila, Drosophila Proteins genetics, Mushroom Bodies metabolism, Neuropeptides genetics, Protein Binding, Transcription Factors genetics, Wnt Signaling Pathway genetics, Cell Polarity physiology, Drosophila Proteins metabolism, Neuropeptides metabolism, Transcription Factors metabolism, Wnt Signaling Pathway physiology
Abstract

The neurogenin (Ngn) transcription factors control early neurogenesis and neurite outgrowth in mammalian cortex. In contrast to their proneural activity, their function in neurite growth is poorly understood. Drosophila has a single predicted Ngn homolog, Tap, of unknown function. Here we show that Tap is not a proneural protein in Drosophila but is required for proper axonal growth and guidance of neurons of the mushroom body, a neuropile required for associative learning and memory. Genetic and expression analyses suggest that Tap inhibits excessive axonal growth by fine regulation of the levels of the Wnt signaling adaptor protein Dishevelled., Competing Interests: The authors declare no competing or financial interests., (© 2016. Published by The Company of Biologists Ltd.)

Published
2016
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