http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
乾熱處理가 무우種子의 大小에 對한 發芽率에 미치는 影響
白賢淑,夏相任,羅富淵,楊泰順 曉星女子大學 園藝學會 1971 園藝學科誌 Vol.- No.1
1. 乾熱處理힌 무우種子의 發牙率이 種子의 大小에 따라 差異가 있는지를 알아보기 위하여 美濃早生무우를 大中小로 選別하여 1個月間 Dessicator에 貯藏한後 70℃의 乾燥器에서 2, 4, 6, 10時間式 熱處理하여 無處理한 種子의 發牙率과 調査 比較하였다. 2. 大 中 小種子의 平均發牙率은 中>小>大의 順으로 發牙率이 좋았는데 中小 種子의 發牙率은 비슷하였으나 大種子의 發牙率은 中 小種子의 發牙率보다 못하고 有意性이 있었다. 3. 熱處理別 平均發牙率은 無處理區와 熱處理區들 間에는 有意性이 있었다. 4. 大種子에서는 熱處理區와 無處理區間에는 有意性이 있었으나 中小種子에서는 有意差가 없었다. 5. 無處理에서는 大中小種子間에 모두 有意差가 없었으나 熱處理區에서는 大種子는 中 小 種子에 比하여 有意하게 發牙가 不良하였고 中小種子間에는 差가 認定되지 않았다.
N-(Arylsulfonyl)benzimidoyl Chloride 유도체의 가수분해 메카니즘에 대한 반응속도론적 고찰
백현숙,이광순,허태성 가톨릭대학교 자연과학연구소 1992 자연과학논문집 Vol.13 No.-
N-(arylsulfonyl)benzimidoyl chloride 유도체들이 가수분해 반응을 반응속도론적으로 다루었다. EHMO계산법을 적용하여 N-(arylsulfonyl)benzimidoyl chloride의 배열, 분자의 반응 중심인 α탄소 원자의 양하전, E_(HOMO-LUMO) 및 S_(N) 1과 S_(N) 2반응 중간체의 상대성 안정성을 결정하였다. 이 결과로 부터 N-(arylsulfonyl)benzimidoyl chloride 유도체의 가수분해는 pH9이하에서 S_(N) 2 반응 메카니즘에 의해 진행됨을 알 수 있었다. The hydrolysis of N-(arylsulfonyl)benzimidoyl chloride derivatives were studied kinetically. As the results of EHMO calculation, the conformation of N-(arylsulfonyl) benzimidoyl chloride molecule, positive charge of Cα atom, which is the reaction center of molecule, E_(HOMO-LUMO) and the stability of intermediate of S_(N) 1 or S_(N) 2 reaction were determined. On the basis of these findings, one can conclude that the hydrolysis of N-(arylsulfonyl)benzimidoyl chloride derivatives proceeds by S_(N) 2 mechanism, below pH 9.00.
백현숙,경희문,성재현 慶北大學校 齒科大學 1991 慶北齒大論文集 Vol.8 No.2
The study was desinged to investigate the difference of craniofacial structures between normal occlusion and Angle's Class Ⅲ malocclusion. The lateral cephalograms were obtained from 36 males and 39 females with class Ⅲ malocclusion, and 39 males and 35 females with normal occlusion. The results obtained were as follows: · The maxilla of Class Ⅲ malocclusion sample was more retruded than that of normal occlusion sample. · A wide variation was observed in the measured position of the maxilla relative to SN plane and FH plane. · Thirty percent of Class Ⅲ sample had retruded maxilla(SNA<79.4°) The measurement of the distance from point A to the nasion perp. line exhibited quited different findings with 58% of the Class Ⅲ sample exhibiting a retrusive maxilla(A to Na perp. line < -1.0). · The mandible of Class Ⅲ malocclusion sample was more protruded than that of normal occlusion sample. · Fifty to seventy percent of Class Ⅲ molocclusion sample showed mandibular protrusion. · No Significant difference was observed in maxillary base inclination between Class Ⅲ malocclusion sample and normal occlusion sample, but mandibular base inclination(FMA) was larger in Class Ⅲ molocclusion sample. · Anterior cranial base length of Class Ⅲ malocclusion sample was shorter in male than that of normal occlusion sample, but posterior cranial base was shorter in female. · Mandibular body length of Class Ⅲ molocclusion sample was significantly larger than that of normal occlusion sample. · Maxillary body length of Class Ⅲ malocclusion sample was shorter than that of normal occlusion sample. · No differences were observed in saddle angle between both sample. · Gonial angle was significantly larger in Class Ⅲ malocclusion sample. · Basal reference planes(SN plane, FH plane) were considerably influenced on the evaluation of facial structures. · According to finding above, Charateristics of craniofacial structures in Class Ⅲ malocclusion were retruded maxilla, protruded mandible, short maxillary length, large mandibular length, high mandibular plane angle and large gonial angle
Evaluation of the Extraction Method for the Cytotoxicity Testing of Latex Gloves
백현숙,유자영,나동균,한동욱,이동희,권오헌,박종철 연세대학교의과대학 2005 Yonsei medical journal Vol.46 No.4
In this study, the cytotoxicity of medical latex gloves to cultured L-929 cells was determined using various extraction conditions. According to the extraction time and temperature, three types of extraction conditions were used: 1) 24 h at 37℃; 2) 72 h at 37℃; 3) 72 h at 50℃. Also, four different extraction vehicles were used, namely, distilled water (DW), 9g/l sodium chloride (saline) in DW, and culture media with or without serum. Under the above-mentioned conditions, the samples were extracted and then 2-fold serially diluted in the concentration range 3.13-50%. When extracted with either DW or saline for 24h or 72 h at 37℃, only 50% diluted samples showed distinct cytotoxicity to L-929 cells. Moreover, no cytotoxic potentials were observed when gloves were extracted with DW or saline at 50℃ for 72 h. Cytotoxicity was markedly greater when gloves were extracted with culture medium, irrespective of the presence of serum in the medium. These results suggest that optimal extraction conditions should be established for the cytotoxicity evaluations of biomaterials and medical devices.
이용오,문선혜,서혜경,백현숙 啓明大學校 醫科大學 1990 계명의대학술지 Vol.9 No.1
The patient presenting with a mass lesion of the parotid is frequently found to have mixed tumors of salivary tissue origin. The lesion is more common in females and inpatients of the median age of 50 years old. Recurrence of the mixed tumor is 0 to 50%. So avoidance of fragmentation or rupture of the tumor and removal of wide marginal tissue along with the tumor during surgery should be emphasized. From the surgical point of view. because of operative risk of facial nerve damage, the most important anatomical structure in relation to the parotid gland is seventh cranial nerve. Of the case reported here, benign mixed tumor occurred in the right parotid region of a 40 year old female patient, treated with surgical excision with preservation of 7th cranial nerve. Eight months follow-up evaluation showed good prognosis, and no evidance of complication and/on recurrence.