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열처리 효과에 따른 PbMoO₄단결정의 전기 전도도와 광 흡수스펙트럼의 변화
이호섭,오인환,이재현,노지현,이동일 國立昌原大學校 基礎科學硏究所 1990 基礎科學硏究所論文集 Vol.2 No.-
PbMoO₄단결정의 전기전도도와 그 열처리 효과를 조사하였다. PbMoO₄단결정의 전기전도도는 저온 영역에서는 산소결함으로 인한 이온 확산이 지배적이었으며, 고온에서는 전자 기여에 의한 효과가 크게 나타났다. 그리고 산소분위기에서 열처리한 시료는 열처리 시간이 증가함에 따라 흡수단 근방의 장파장 영역에서 흡수율이 증가 하였다. The electrical conductivity of PbMoO₄single crystals and it's annealing effect were investigated. From the experiment, we conclude that oxygen vacancies are responsible for electical conductivities in low termperature region. But in high temperature, ac conductivity caused by electronic behavior increases rapidly with temperature increases. The absorption coefficient of PbMoO₄annealed in the oxygen atmosphere increases with time in the long wavelength regions above the absorption edges.
Shin, Yong-Seub,Lee, Mun-Jung,Lee, Eun-Sook,Ahn, Joon-Hyung,Do, Han-Woo,Choi, Don-Woo,Jeong, Jong-Do,Lee, Ji-Eun,Kim, Min-Ki,Park, Jong-Uk,Um, Young-Ghul,Park, So-Deuk,Chae, Jang-Heui 한국유기농업학회 2013 韓國有機農業學會誌 Vol.21 No.4
The objective of this study was carried out to elucidate the effect of LEDs (light emitting diodes) irradiation in relation to early growth and inorganic elements in leaf lettuce (Lactuca sativa L. ‘Chung Chi Ma’). In morphological changes of leaves, shoot elongation and hypocotyl length showed poor growth in red light irradiation, while the red+blue light irradiation induced shorter plant height and much greater leaf numbers resulting in increased fresh weight. In change of the Hunter's color and SPAD values, lettuce seedlings grown under in red+blue and fluorescent light irradiation had a higher a* value, otherwise SPAD values were not changed in these light irradiations. Interestingly, relative chlorophyll contents showed 1.8 times increased redness in the treatment of red+blue light irradiation. Inorganic element (N, Ca, Mg, Mn, and Fe) and ascorbic acid contents were increased in lettuce plants grown under LEDs light irradiation compared to those of lettuce grown under the fluorescent light which showed higher P and Mn contents. In conclusion, it is considered that red+blue light irradiation which stimulates growth and higher nutrient uptake in leaf lettuce could be employed in containers equipped with LEDs.
( Ji Young Seo ),( Ho Yeol Lee ),( Soo Jin Kim ),( Moon Seub Shin ),( Sik Haw ),( Hai Jin Park ),( Seong Hyun Kim ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: The incidence of cutaneous malignant tumors such as basal cell carcinoma (BCC), squamous cell carcinoma (SCC), and malignant melanoma (MM) has continuously increased in worldwide. Objectives: Our purpose of this study was to analyze the recent changes in the incidence and clinical characteristics of cutaneous malignant tumors in North-west Gyeonggido Province and to compare them with the other previously reported data. Methods: We reviewed 197 cases of cutaneous malignant tumors out of a total 148,284 outpatients who had visited the Department of Dermatology at the Ilsan Paik Hospital during 8 years period between January 2005 and December 2012. Results: The average annual incidence of cutaneous malignant tumors among the total number of outpatients was 0.09% (0.07 ~ 0.20%). The most common cutaneous malignant tumor was BCC (42.64%), followed by SCC (21.32%), MM (8.63%), mycosis fungoides (5.08%), keratoacanthoma (4.57%), Kaposi sarcoma (4.57%), metastic carcinoma (4.06%), and lymphoma (4.06%). The mean age of onset of the patients was 66.7 years old. The most common site was face (49.24%). The nose (14.72%) was the most preferential site on the face, followed by the cheek (14.21%). Conclusion: The incidence of skin cancers has not significantly changed. But among the cutaneous malignant cancers, the incidence of SCC has gradually increased.