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1100-알루미늄 薄析의 機械的 性質과 耳形成에 미치는 調質處理의 影響
芮吉村,崔舜惇 嶺南大學校 工業技術硏究所 1976 연구보고 Vol.4 No.1
The effects of the partial annealing on the mechanical properties and the earing phenomena were investigated for 1100-AL foil. Tensile test and manual deep drawing test were carried out. The results obtained are as follows. 1. As the reduction ratio of final cold rolling is increased, the elongation of the foil is improved. 2. The ratio of Y.S./T.S. of the partial annealed foils is increased to 5-15% in comparison with that of the cold rolled state, but is held constant in the range of partial annealing temperature, 150-220℃. 3. The recrystallization texture is appeared to form 90°ear by partial annealing (temp; 180-220℃).
장일성,최길돈,하기정 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.2
A clinical study of hyperthyroidism was performed for 20 patient who received operation at the department of surgery of C. N. U. H. from March, 1973 to July, 1987. The results were as follows: 1) In clinical classification, 14 cases (80%) were diffuse toxic goiter and 6 cases (20%) were nodular toxic goiter. 2) Male to female ratio was 1 : 19 and the highest incidence in the 3rd decade. 3) Main symptoms and signs were, in the order of decreasing frequency, neck mass (95%), palpitation (85%), fatigability (80%), heat intolerance (75%), weight loss (65%), tremor (60%) headache (50%). 4) Pulse rate changed from 130 per minute preoperatively to 60 postoperatively. 5) Thyroid function test revealed high level above the normal in 16 (80%) and the mean value of T_3RI_4 4.06mg/ml, T_3RI_4 10.48mg/ml, free T_4 4.65/ug/dl, postoperatively all cases showed teuthyroid function. 6) Electro-cardiographic findings were sinus tachycardia 9 cases (45%), normal 6 cases (30%). sinus bradycardia 5 cases (25%). 7) In preoperative preparation, Lugol solution was more frequently used 8 cases (40%) and others prophylthiouracil plus lugol solution 4 cases (20%), Inderal plus lugol solution 4 cases (20%) Methimazole plus lugol solution 2 cases (10%), prophylthiouracil plus Inderal plus comthyroid plus lugol solution 2 cases (10%). Average mean duration of preoperative preparation was 12.8 days. 8) The types of operation were in the order of decreasing frequency near total thyroidectomy 9 cases (45%), subtotal thyroidectomy 6 cases (30%), Lobectomy 4 cases (20%) and total thyroide ctomy 1 case (5%), 9) Early postoperative complication were transient tremor 3 cases (15%) transient hoarseness 1 case (5%), hypothyroidism 1 case (5%), recurrent hyperthyrodism 1 case (53%), hypoparathyroidism l. case (53%) but there was no case of operative motality.
최돈혁(Don Hyeok Choi),최광순(Kwang Soon Choi),황길순(Gil Son Hwang),김동섭(Dong Sup Kim),김세원(Sea Won Kim),강호(Ho Kang) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.10
시화호 인공습지의 유기물생산에 대한 갈대부착조류의 기여도를 평가하기 위하여 유입수의 수질특성이 다른 두습지(반월천습지와 동화천습지)에서 4월부터 10월까지 매월 부착조류의 1차생산력을 측정하였다. 부착조류의 현존량은 반월천습지와 동화천습지에서 각각 37~3,581 mgChl.a/m2surface stem(평균 655 mgChl.a/m2surface stem), 87~2,093 mgChl.a/m2surface stem(평균 527 mgChl.a/m2surface stem)의 범위로 동화천습지에 비해 반월천습지에서 큰 값을 보였다. 반면 부착조류의 광합성효율을 나타내는 동화계수(assimilation number; AN)는 반월천습지에 비해 TN/TP 비가 작은 동화천습지에서 높았다. 두 습지로 유입되는 유입수의 TN/TP비와 AN사이에서의 음의 상관(r=0.46)으로부터 부착조류의 높은 광합성효율은 낮은 TN/TP와 관련이 있는 것으로 사료된다. 부착조류의 단위면적당 일일 1차생산력은 반월천습지에서 307~2,473 mgC/m2/day, 동화천습지에서 756~2,096 mgC/m2/day로 두 습지 모두 여름에 높은 값을 보였다. 두 습지의 평균 1차생산력은 반월천습지가 부착조류의 현존량이 큼에도 불구하고 1,166 mgC/m2/day으로 동화천습지(1,467 mgC/m2/day)에 비해 낮았다. 이는 AN 값에서 알 수 있듯이 반월천습지의 광합성효율이 동화천습지에 비해 낮았기 때문으로 판단된다. 시화호 인공습지에서 갈대부착조류에 의한 연간 총 유기물생산은 300 tonC/year(습지 전체 유기물생산의 33%)로 습지내 유기물생산에 부착조류의 기여가 큰 것으로 나타났다. 습지내 과도한 유기물생산은 습지의 수처리효율을 저하시킬 수 있으므로 수처리용 인공습지의 관리에 있어서 갈대부착조류의 역할이 고려되어야 한다. To estimate the contribution of epiphytic algae attached on reed to organic matter production in constructed wetland, primary productivity by epiphytic algae was investigated in two sub-wetlands (Banweol and Donhwa wetlands) of the Sihwa Constructed Wetland (CW) with different chemistry of inflows. Chlorophyll a concentration of epiphytic algae was higher in the Banweol wetland (range:37~3,581 mgChl.a/m2surface stem, average:655 mgChl.a/m2surface stem) than the Donhwa wetland (range:87~2,093 mgChl.a/m2surface stem, average:527 mgChl.a/m2surface stem). In contrast, assimilation number (AN) representing photosynthetic activity was higher in the Donhwa wetland with low TN/TP ratio than the Banweol wetland. A negative correlation (r=0.46) was observed between TN/TP ratios of inflows and AN in two wetlands, implying that high photosynthetic activity of epiphytic algae may be related with low TN/TP ratio. The areal primary productivity ranged from 307 to 2,473 mgC/m2/day in the Banweol wetland and from 756 to 2,096 mgC/m2/day in the Donghwa wetland, showing high productivity in summer. Average primary production was lower in the Banweol wetland (1,166 mgC/m2/day) than the Donghwa wetland (1,467 mgC/m2/day), although the standing crop (as chlorophyll a concentration) was high in the Banweol wetland. This result may be due to the low photosynthetic activity of epiphytic algae in the Banweol wetland with high TN/TP ratio. The annual primary production (300 tonC/year) of epiphytic algae contributed 33% of the total production in the Sihwa CW. An excessive organic matter production in constructed wetland can negatively affect the efficiency of water treatment. Therefore, the role of epiphytic algae should be considered in management of constructed wetland for water treatment.
Choi, Seong-Soo,Hahm, Kyung-Don,Min, Hong-Gi,Leem, Jeong-Gil The Korean Neurosurgical Society 2011 Journal of Korean neurosurgical society Vol.50 No.5
Objective : Excitatory amino acids play important roles in the development of secondary pathology following spinal cord injury (SCI). This study was designed to evaluate morphological changes in the dorsal horn of the spinal cord and assess profiles of pain behaviors following intraspinal injection of N-methyl-D-aspartate (NMDA) or quisqualate (QUIS) in rats. Methods : Forty male Sprague-Dawley rats were randomized into three groups : a sham, and two experimental groups receiving injections of 125 mM NMDA or QUIS into their spinal dorsal horn. Following injection, hypersensitivity to cold and mechanical stimuli, and excessive grooming behaviors were assessed serially for four weeks. At the end of survival periods, morphological changes in the spinal cord were evaluated. Results : Cold allodynia was developed in both the NMDA and QUIS groups, which was significantly higher in the QUIS group than in the NMDA group. The mechanical threshold for the ipsilateral hind paw in both QUIS and NMDA groups was significantly lower than that in the control group. The number of groomers was significantly higher in the NMDA group than in the QUIS group. The size of the neck region of the spinal dorsal horn, but not the superficial layer, was significantly smaller in the NMDA and QUIS groups than in the control group. Conclusion : Intraspinal injection of NMDA or QUIS can be used as an excitotoxic model of SCI for further research on spinal neuropathic pain.