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Microwave irradiation on a-axis oriented Y123/Pr123 two-stacked Josephson junctions device
S. Saini,P. Mele,M. Mukaida,김상재 한국물리학회 2015 Current Applied Physics Vol.15 No.5
Two-stacked submicron Josephson junctions devices were fabricated in a-axis oriented YBaCu3O7 and PrBa2Cu3O7 (Y123/Pr123) multi layered thin films using focused ion beam milling technique. The transition temperature and critical current density (Jc) of the device are about 83 K and 5 ×105 A/cm2 at 20 K, respectively. The device was irradiated with external microwave of 10 GHz and studied at 20 K. The microwave induced voltage steps are observed in I-V characteristics. The supercurrent branch become resistive above a certain microwave power and also the Jc was suppressed as we increased the microwave power. Magnetic field modulation of critical current shows periodicity of about 2000 gauss correspond to the Josephson junctions in the stack.
Influence of Silicon Spray on Storability of Truss Tomato in MA Storage
( M. Z. Islam ),( M. A. Mele ),( M. J. Jeong ),( I. S. Kim ),( S. K. Hong ),( I. L. Choi ),( J. P. Baek ),( H. M. Kang ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2014 강원 농업생명환경연구 Vol.26 No.3
This study was conducted to find out the performance of silicon foliar spray treatment on storability of truss tomatoes (Lycopersicon esculentum Mill. cv. Campari and Temptation) in MA (20,000 cc/m2 · day· atm O2 permeability film) storage. Tomatoes were grown by hydroponics at Gangwon province in Korea during the winter, harvested at light red maturity stage and packaged with MA condition for stored at 8℃ and to investigate the storability. The silicon sprayed as a whole plant that displayed the utmost visual quality had the oxygen 5.94-12.28%, carbon dioxide 6.72-7.94% and ethylene concentration around 0.43-1.67 μL/L of ‘Campari’ and the oxygen 3.82-10.84%, carbon dioxide 7.40-10.20% and ethylene concentration around 0.69-1.75 μL/L of ‘Temptation’. The range of fresh weight loss of ‘Campari’ was less than 0.22% and ‘Temptation’ was less than 0.20% during the storage period at 8℃. The higher visual quality maintained by silicon sprayed as a whole plant than other treatments of both cultivars on the MA storage period at 8℃. The silicon sprayed as a whole plant had a positive effect to reduce the fungal incidence of both cultivars during the MA storage period at 8℃. Moreover, the silicon sprayed as a whole plant showed more prominent firmness than other treatments for storage days of both cultivars. Therefore, the silicon foliar sprays as whole plant has the positive effect to advance storability, reduced fungal incidence, maintained vitamin C, soluble solids and retain firmness.
Ultraviolet Light (UV-C) Irradiation Reduced Postharvest Fungal Incidence of Cherry Tomato
( M. Z. Islam ),( M. A. Mele ),( I. S. Kim ),( S. K. Hong ),( J. P. Baek ),( H. M. Kang ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2015 강원 농업생명환경연구 Vol.27 No.2
This study was conducted to reduce the postharvest fungal incidence of cherry tomato (Lycopersicon esculentum Mill. cv. Unicorn) by ultraviolet light (UV-C) irradiation in MA storage. Hydroponic grown red maturity stage of cherry tomatoes was collected from Gangwon province. Tomato fruits were inoculated with Botrytis cinerea (grey mould). Afterwards, ultraviolet irradiation (254 nm, UV-C) of 7, 14, 21 and 28 kJ/m2 treated to tomato fruits. And treated UV-C tomatoes were packed with MA condition (20,000 cc/m2.day.atm O2 permeability film) to store at 5˚C for 20 days with 85% relative humidity. The 28 kJ treatment which showed the best visual quality maintained around 3.30-6.60% of carbon dioxide concentration and 16.08-17.50% oxygen and 0.26-1.11 μL/L ethylene during the storage. As storage periods progressed, the fresh weight loss was increased but did not exceed the maximum permissible of fresh weight loss. The 28 kJ performed the highest firmness among the treatments. The UV-C treatments demonstrated the less fungal incidence than control. The 28 kJ treatments exhibited the best visual quality, firmness, titratable acidity and less fungal incidence among the treatments. So, ultraviolet (UV-C) irradiation reduced postharvest fungal incidence of cherry tomato.