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Kim, Haein,Jeong, Yong Taek,Choi, Min Sung,Choi, Jaekyun,Moon, Seok Jun,Kwon, Jae Young Korean Society for Molecular and Cellular Biology 2017 Molecules and cells Vol.40 No.5
Regulation of feeding is essential for animal survival. The pharyngeal sense organs can act as a second checkpoint of food quality, due to their position between external taste organs such as the labellum which initially assess food quality, and the digestive tract. Growing evidence provides support that the pharyngeal sensory neurons regulate feeding, but much is still unknown. We found that a pair of gustatory receptor neurons in the LSO, a Drosophila adult pharyngeal organ which expresses four gustatory receptors, is involved in feeding inhibition in response to high concentrations of sodium ions. RNAi experiments and mutant analysis showed that the gustatory receptor Gr2a is necessary for this process. This feeding preference determined by whether a food source is perceived as appetizing or not is influenced by nutritional conditions, such that when the animal is hungry, the need for energy dominates over how appealing the food source is. Our results provide experimental evidence that factors involved in feeding function in a context-dependent manner.
Seoyeon Kwon,Sumin Kim,Haein Yim 한국물리학회 2020 Current Applied Physics Vol.20 No.1
In the present study, we investigated the effect of heat treatment on the magnetic properties of the Fe87- xSixB9Nb3Cu1 (x=1, 3, 5, 7, 9, and 13.5) alloy system. Ribbon samples with the width of 2mm and thickness of 20–30 μm were synthesized by melt spinning. Among the samples, only amorphous samples were nanocrystallized by annealing between 360 and 600 °C. The annealed alloys tended to have improved soft magnetic characteristics, including higher saturation magnetic flux density (Bs), while maintaining high relative permeability (μr), and low core loss (Pcv). A high saturation magnetic flux density of 1.51 T was obtained for the Fe78Si9B9Nb3Cu1 core sample after longitudinal magnetic field annealing at 520 °C. The sample had excellent soft magnetic properties as compared to the conventional value of FINEMET core (Bs=1.23 T), which is a significant improvement as compared to the as-spun ribbons (Bs=1.10-1.26 T).