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지윤의 ( Ji Yun Ui ),이미정 ( Lee Mi Jeong ),김효정 ( Kim Hyo Jeong ),이규석 ( Lee Gyu Seog ),이선 ( Lee Seon ),송호경 ( Song Ho Gyeong ) 한국환경생물학회 2003 환경생물 : 환경생물학회지 Vol.21 No.3
본 연구는 충남 금산군에 위치한 진악산 산림식생을 대상으로 식물사회학적 방법으로 산림군락을 분류하고 방형구법으로 임분 특성을 분석하였다. 진악산의 26개 조사구를 분석한 결과, 산림군락은 신갈나무군락, 굴참나무군락, 갈참나무군락 및 소나무군락으로 구분되었으며, 피도율은 교목층이 79.4%, 아교목층이 27.6%, 관목층이 37.0%, 초본층이 31.1%의 순으로 나타났다. DBH 2㎝ 이상의 수목을 대상으로 중요치를 분석한 결과는 신갈나무가 45.51, 소나무가 44.17, 굴참나무가 27.56, 졸참나무가 26.78, 갈참나무가 20.81, 벚나무가 15.58 등의 순으로 나타났으며, 흉고직경급을 분석한 결과 신갈나무, 굴참나무, 갈참나무, 소나무는 5㎝ 이하의 어린 개체와 15㎝ 이상의 큰 개체는 적고 5~15㎝의 중간 개체가 많아 이들이 당분간 우점할 것으로 판단된다. This study was carried out to analyze forest vegetation of Jinaksan in Geumsan, Chungnam Province. Employing the releve method of Braun-Blanquet, 26 plots were sampled in forest of Jinaksan. The communities were classified into Quercus mongolica, Quercus uariabilis, Quercus aliena, and Pinus densiflora communities. Coverage rate was 79.4% in tree layer, 27.6% in subtree layer, 37.0% in shrub layer, 31.1% in herb layer, respectively. The importance values were 45.51 in Q. mongolica, 44.17 in P. densiflora, 26.56 in Q. uariabilis, 26.78 in Q. serrata, 20.81 in Q. aliena, and 15.58 infPrunus serrulata var. spontanea, respectively. Most of the DBH in the Q. mongolica, Q. variabilis, Q. aliena, and P. densiflora was between 5 ㎝ and 15 ㎝. Therefore, Q. mon-golica, Q. variabilis, and Q. aliena will be dominant species in the study area for several decades.
무모생쥐 피부에 1320 nm Nd:YAG 레이저와 long-pulsed 1064 nm Nd:YAG 레이저의 조사 효과
김주용 ( Kim Ju Yong ),정현주 ( Jeong Hyeon Ju ),김동석 ( Kim Dong Seog ),이규석 ( Lee Gyu Seog ) 대한피부과학회 2004 대한피부과학회지 Vol.42 No.4
N/A Background: The treatment of facial rhytides has traditionally centered around methods that involve removal of the epidermis and superficial dermis, encouraging the production of a new epidermis with collagenesis and remodelling. But all of the resurfacing techniques lead to postoperative complications such as oozing, bleeding, infections, downtime as the skin begins to reepithelialize, and the occasional incidence of posttreatment, postinflammatory pigmentary changes. 1320㎚ and 1064㎚ wavelengths are nonspecifically absorbed in the human dermis and are unique for its significant horizontal scattering. These wavelengths, when used for localized facial areas, have been shown to produce new collagen formation and improvement in the quality of treated skin. Objective: The purpose of this study was to examine the effect of 1320㎚ Nd:YAG laser and long-pulsed 1064㎚ Nd:YAG laser irradiation on hairless mouse skin and rat skin. Methode: In this study, the effect of 1320㎚ Nd:YAG laser and long-pulsed 1064㎚ Nd:YAG laser irradiation were examined by Hematoxylin and eosin (H&E) stain, Masson`s trichrome stain, immunohistochemical stain for type I collagen and dot-blot hybridization for α1(Ⅰ) procollagen mRNA. Results: IN the H&E stain, Masson`s trichrome stain, and immunohistochemical stain of the hairless mouse skin, the number of collagen fibers with a greater density of fibers increased, compared to the non-irradiated controls on both the 1320㎚ Nd:YAG laser and the long-pulsed 1064㎚ Nd:YAG laser. In the dot-blot hybridization in the hairless mouse, levels of α1(Ⅰ) procollagen mRNA were increased 3.0-fold, 4.8-fold and 5.2-fold at each 1 week 4 weeks and 12 weeks after irradiation in 1320㎚ Nd:YAG laser and 1.8-fold and 2.1-fold at each 4 weeks and 12 weeks after irradiation in long-pulsed 1064㎚ Nd:YAG laser, compared to the non-irradiated controls. But in the 1320㎚ Nd:YAG laser irradiation on the rat, there is no significant change in the number and density of collagen fibers, compared to the non-irradiated controls. Conclusion: These results indicate that the 1320㎚ Nd:YAG laser and the long-pulsed 1064㎚ Nd:YAG laser may be a powerful up-regulator of collagen synthesis through significant dermal damage and the 1320㎚ Nd:YAG laser is better than the long-pulsed 1064㎚ Nd:YAG laser for collagen synthesis. Therefore, the 1320㎚ Nd:YAG laser can be more effective clinically than the long-pulsed 1064㎚ Nd:YAG laser for the treatment of photodamaged skin. (Korean J Dermatol 2004;42(4):385~391)