후드周邊裝荷 抛物形 空中線의 側葉特性

孫鉉,李大寧 경북대학교 공과대학 1983 工大硏究誌 Vol.12 No.-

Fabricated a Hood which was adhered polyurethan form impregnated carbon powder in and loaded on the parabolic antenna side. Found the Hood absorbed sidelobes of microwave radiation energy from 2 dB to 9 dB for E-plane pattern and from 4 dB to 15 dB for H-plane pattern at d=4/3λ

Brine Shrimp Bioassay를 이용한 해양생물의 세포독성검색

손병화,조용진,이대령,노연숙,이선미,최홍대 동의대학교 기초과학연구소 1994 基礎科學硏究論文集 Vol.4 No.1

As a part of chemical study on the bioactive metabolites from marine organisms, we have investigated cytotoxicity using brine shrimp bioassay for each solvent fractions of the marine algae(12 species), marine sponges(3 species), coelenterates(2 species), echinoderms(4 species), marine molluscs(17 species), and ascidians(2 species), respectively. As the results, chloroform extract of Stichopus japonicus (LC_50 : 274 ㎍/ml), ethyl acetate extract of Anthocidaris crassispina(LC_50 : 121 ㎍/ml), n-butanol extract of Undaria pinnatifida (LC_50 : 178 ㎍/ml), and water extract of Thais clavigera (LC_50 : 61 ㎍/ml), displayed the most significant cytotoxic activity against brine shrimp. Among the marine organisms tested, echinoderms and marine molluscs were thought to be the most active Phylums on screening of new bioactive compounds.

들깨(Perilla) 品種改良 및 育成에 관한 硏究(Ⅰ) : 들깨 在來種의 特性調査 Characteristics of Korea local perilla

孫賢秀,金正基,安始榮,鄭大守 東亞大學校 1978 東亞論叢 Vol.15 No.2

1977年度 本 大學校 農科大學에서 들깨(Perilla) 品種改良 및 育成을 위하여 全國108個 募集在來種의 裁培에 의한 特性을 調査하여 選? 育種의 基礎的 資料를 얻고자 實施된 本 試驗의 結果를 要約하면 다음과 같다. 1. 草長, 葉面積 1ℓ重 및 1000粒重은 高度의 有意性이 있었고 莖値徑, 花房長, 花房數 子房數 및 株當收量에 있어서는 5% 水準에서 有意性이 認定되었다. 2. 株當收量을 Y로하는 收量構成要素의 相關係數에서 稈長, 莖値徑, 分技數, 子房數 및 1000粒重에서 高度의 正의 相關關係가 認定되었고 花房長은 5%水準에서 正의 相關關係가 있었다. 3. 1000粒重이 5g以上인것은 白色種皮가 많았고 油胎含有率은 40%以下였으며 褐色種皮는 50%以上의 油胎含有率을 나타내었다. 4. 本試驗에서 選?育種으로 推정할수 있는 在來系綜은 다음과 같다. ① 多收性인것 412 연기 51.18g/1株 614 성주 52.88g 〃 701 남제주51.30g 〃 809 문경 60.94g 〃 915 진양 50.71g 〃 ② 早生性인것 201 강능生育日數 131 日 307 제천生育日數 131 日 403 논산 〃 921 통영 〃 932 남해-2 〃 ③ 油胎含有率이 높은것 309 진천 50.2% 416 천원 52.9% 611 무안 52.9% 619 영암 50.1% 805 금능 50.5% ④ 葉面積이 넓은것 206 양구-1 154.40cm² per leaf 608 나주 150.90 〃 612 보성 150.70 〃 626 화순 171.10 〃 809 문경 160.20 〃 Fundamental experiments on Perilla breeding were carried out with 108 local perilla species, and the resuts obtioned were as follows. 1) Statistically high significance was revealsed in terms of plant length, leaf area and weight per 1 litre and weight of 1,000 grains, and significance was also recognized in the yield per plant at 5% level. 2) linear regression was positively appeard between the yield of plant and plant length, culm height, valid brances No, number of ovary, weight of 1,000 grains and positive correlation wasalso recognized between yield of plant and length of flower ovary at 5% level. 3) More than 50% of oil was contained in brown colored perilla seed, and less than 40% of oil was in white colored seed and its 1,000 grain weight was more than 5g. 4) Following local species were recommended for selecting the breeding; 1. For increasing the yields. 412 Yeon-Kie : 51.18g per plant 614 Seong-Ju : 52.88g 〃 701 Nam-Je Ju : 51.30g 〃 809 Moon-Keong : 60.94g 〃 915 Jin-Yang : 50.71g 〃 2. For early growing local species. 201 Kang-Neung growing periods : 131 days 307 Je-Cheon 〃 : 131 〃 403 Non-San 〃 : 131 〃 921 Tong-Yeong 〃 : 131 〃 932 Nam-Hae-2 〃 : 131 〃 3. For high conten tration of oil. 309 Jin-Cheon : 50.2% 416 Cheon-Weon : 52.9% 611 Moo-Ann : 52.9% 619 Yeong-Am : 50.1% 805 Geon-Neon : 50.5% 4. For wide leaf area. 206 Yang-Ku-1 : 154.40cm² per leaf 608 Nae-Jue : 150.90 〃 612 Bo-Seong : 150.70 〃 626 Hw-Soon : 171.10 〃 809 Moo-Kyeong : 160.20 〃

마이크로 엔드밀을 이용한 Slot 가공에서의 공구변형에 의한 가공오차 보상

손종인,윤대진,윤길상,서태일 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-

In this paper, we describe about machining error for tool deflection in slot-cutting processes using micro end-mill. In order to determine the compensated tool path, two machining error parameters are defined and modeled using the SEM images. Experiments are carried out to validate the approaches proposed in this paper. In result of, we decrease a machining error in slot-cutting processes for compensated tool path.

생물학적 질산화를 이용한 제올라이트 재생을 위한 기초 연구

손대희,최영균 대구대학교 환경기술연구소 2005 미래환경기술 Vol.1 No.2

Zeolite is well known material for its ability to preferentially remove ammonium ions from wastewater. However, its usage has been limited by high cost for chemical regeneration on this purpose. As an alternative, biological regeneration of zeolite has been suggested by some researchers. In this study, the characteristics of biological regeneration of zeolite was studied at various conditions, i.e. changes in microorganism and Na^(+) concentration. In the first test, the percentage of bio-regeneration via nitrification in the columns (MLVSS 2,250 mg/ℓ and 4,500 mg/ℓ) was 2.6 times higher than the column with NaHCO3 (2,980 mg/ℓ) addition only. In the second test, MLVSS were changed (400, 800 and 3,200 mg/ℓ) but, for alkalinity supply, NaHCO3 concentration was fixed at 745 mg/ℓ. The regeneration rates were proportional to the MLVSS concentration, but the same amounts of total regenerated nitrogen were achieved in all columns tested. In the third test, the regeneration tests were performed to evaluate effects of Na^(+) concentration on regeneration were tested. The regeneration efficiency was enhanced about 5% when Na^(+) concentration increased from 342 to 734 mg/ℓ. There was no difference in regeneration rate by nitrification. Therefore the higher regeneration efficiency of zeolite could be obtained by nitrification than by chemical methods. The regeneration rates with the fixed Na^(+) concentration were proportional to nitrification rate, and the regeneration efficiencies with the fixed microorganism concentration were highly dependant on cation concentrations such as Na^(+).

치근단 절제술 시행 2년 후의 치근단 병소 치유 증례

손호현,박정기,최대우 全北大學校 齒醫學硏究所 1985 전북치대논문집 Vol.3 No.1

A 27-year-old Korean woman presented with intermittent dull pain at the periapical area of the maxillary right lateral incisor. At the periapex of the tooth radiolucency was observed. Clinical examination revealed the open pulp chamber, foul, odor, slight mobility and tenderness to percussion. Diagnosis was made as periapical granuloma secondary to pulp necrosis. Conventional root canal therapy was done and the canal were sealed permanently with gutta-percha and zinc oxide-eugenol sealer and finally apicoectomy was performed. Twenty-two months later, standard periapical film of the tooth showed the increasing periapical radiopacity suggesting bon regeneration. Any clinical symptoms were abscent and the maxillary right lateral incisor functioned normally.

급성 골수성 백혈병 환자의 말초혈액 단핵구로부터 수지상세포로의 분화 유도

손상희,이대희,박재선,어완규 고신대학교 의학부 2002 高神大學校 醫學部 論文集 Vol.17 No.1

Background Dendritic Cells (DCs) are the most potent naturally occuring antigen presenting cells and play an important role in T-cell activation. DCs may be suited for in vivo immunotherapy for its capability to stimulate naive T cell. Effective presentation of tumor antigens is fundamental to strategies aimed at enrolling the immune system in eradiation of residual disease after conventional treatments. Myeloid malignancies provide a unique opportunity to derive dendritic cells (DCs), functioning antigen presenting cells, from the malignant cells themselves. These may then co-express leukemic antigens together with appropriate secondary signals and be used to generate a specific, antileukemic immune response. Methods In this study, peripheral blood mononuclear cells (PBMCs) from 5 patients with acute myeloid leukemia (AML) were cultured with combinations of Flt-3 Ligand (FL), granulocyte-macrophage colony-stimulating factor (GM-CSF), interleukin-4(IL-4), and tumor necrosis factor-α(TNF-α), and development to DCs was assessed. Peripheral blood mononuclear cells (PBMCs) were obtained from 40-60㎖ of peripheral blood of patients with acute myeloid leukemia (AML) by Ficolling. Cells were resuspended in X VIVO-20 medium supplemented with FL (100ng/㎖), GM-CSF(100ng/㎖), IL-4(50ng/㎖), and TNF-α(20ng-㎖) and seeded into T75 culture flasks at 3×107/50㎖. Results After 12 days in culture, cells from 5 samples exhibited morphological and immunophenotypic features of DCs, including expression of CDla, CD83, and CD86. Conclusion This study indicates that cells with enhanced antigen-presenting ability can be generated from PBMCs of patients with acute myeloid leukemia, that these cells can effectively prime autologous cytotoxic T cells in vitro, and that they may be used as potential vaccines in the immunotherapy of AML.

초등학교 과학 교과서 변천에 관한 연구 : 3차~7차 교육과정 물질 영역을 중심으로 centered on the area of matter from 3rd curriculum to 7th curriculum

손양옥,이대형 춘천교육대학교 과학교육연구소 2004 과학교육연구 Vol.27 No.-

다단토양층을 이용한 하수처리에 관한 연구

손대희,정윤철,신정훈,정진영,안대희 한국물환경학회 2004 한국물환경학회지 Vol.20 No.3

The sewages produced from small villages, rural community, drinking water reservation area and park which doesn't have sewage piping system can be caused a serious water pollution at the restricted areas. The objective of this research was to suggest an economical and effective sewage treatment method by investigating the removal of the organics, nitrogen, and phosphorus in the multi-soil-layering reactor. Soil, natural zeolite, and iron slag were used as a supporting media of multi-soil-layering in this research. The purpose of natural zeolite addition was to maintain the consistent ammonium exchange capacity by providing a sequential environment, and that of iron slag addition was to remove phosphorus by adsorption. Continuous experiment of lab-scale single-soil-layering (S-1), multi-soil-layering (S-2), and mixed-soil-layering (S-3) methods were studied to compare and optimize three different types of the reactors. The organic removal efficiencies showed more than 90% in all three reactors. While S-1 and S-3 reactors showed about T-N removal of 31%, 45%, respectively, the average T-N removal efficiency of the S-2 reactor represented an 87%. In conclusion, that results suggest that the multi-soil-layering reactor could be effectively utilized as a plant for treatment of small village sewage.

乙淑島의 鹽害地改良과 適作物 選定試驗에 관한 硏究

孫賢秀,金正基,安始榮,鄭大守 東亞大學校 1974 東亞論叢 Vol.11 No.2

乙淑島의 鹽海地 改良과 適作物選定 試驗에 관한 圃場現地試驗을 加里의 增施, 堆肥施用, 石灰施用等 要因實驗으로 實施한 結果 얻어진 結果를 要約하면 다음과 같다. 1. 堆肥施用은 채소의 發芽生育 및 收量增大에 效果가 컸다. 2. 石灰施用효과도 認定되었다. 3. 施用堆肥는 鹽分을 含有蓄積하였다. 4. 堆肥施用區의 毛管水中 鹽分濃度는 他區에 比해 적었다. 5. 共試作物中 鹽度에 對한 저항이 가장 큰것은 배추였다. 6. 鹽害地砂質土壤에서도 菜蔬栽培가 可能하였다. In order to improve nearly unarable Saline sand soil, a factorial experiment have been conducted to find out the effect of compost, lime and increased potassium application on the yield, germination and growth of some vegetables; the result obtained and discussed may be summarized as follows: (1) The effect of compost application was great to germination, growth and yield of some vegetables. (2) The effect of lime application was convinced. (3) NaCl-salts is much more concentrated in compost applied. (4) The salt concentration involved in capillary water at the plot of compost applied was less than that of the other plots. (5) Chinese Cabbage is most resistant to salt concentration among the vegetables tested. (6) It was able to grow vegetable cultivation on Woolsuck Island of Saline and Sand soil.