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금속분말 Ni을 용해 한 Chloride Bath로 도금된 니켈후막의 입자크기에 대한 전류밀도 영향
박근용(Keun Yung Park),엄영랑(Young Rang Uhm),최선주(Sun Ju Choi),박덕용(Deok-Yong Park) 한국자기학회 2013 韓國磁氣學會誌 Vol.23 No.1
Nanocrystalline nickel (Ni) tick films were synthesized by direct current electrodeposition at current density from 1 to 30 mA/cm² and pH = 4. The basic composition of the bath, which was prepared by dissolving Ni metal particles in HCl, was 0.2M Ni ions. The effects of the current density on the average grain size of Ni deposits were investigated by XRD and SEM techniques. The results showed that the surface roughness was decreased as the saccharin addition was increased up to 2 g/l. The experimental results showed that the increase in the current density had a considerable effect on the average grain size of the Ni deposits. The perpendicular magnetization was raised as the thickness of coating layer was increased.
박기락(Ki Lack Park),박근용(Keun Yung Park),강영우(Young Woo Kang) 대한내과학회 1996 대한내과학회지 Vol.51 No.5
Objectives: Some proportion of Korean patients with irritable bowel syndrome may have lactose intolerance as the prevalence of lactose intolerance in Korea is very high. This study was undertaken to determine the prevalence of lactose intolerance in Korean adults with the irritable bowel syndrome and the relationship between lactose intolerance and history of milk intolerance. Methods: 50 patients with the irritable bowel syndrome were tested for lactose intolerance by measurement of breath hydrogen excretion after ingestion of 50g of lactose. Results: 33 of the 50 patients (66%) had lactose intolerance. Twenty of 33 subjects with a history of milk intolerance had positive lactose hydrogen breath test, and thirteen of 17 subjects without it had also positive result. Therefore, there was no significant relationship between lactose intolerance and history of milk intolerance (p>0.05). Conclusion: Korean adults with irritable bowel syndrome need to be screened by lactose hydrogen breath test.