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金性洙,崔敏浩,鄭址雄,權一男 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.1
The objectives of the study were to: 1) analyze the structure and styles of the printed media for agricultural information, 2) review the utilization of the magazine by farmers and extension workers, 3) survey the needs of subscribers for the printed media, 4) find ways for improvement in putting out the magazine, and 5) recommend effective methods for publication and utilization of the printed media. Data were collected by mail and group interview from 179 of the randomly sampled farmers and from 148 of the extension agents in selected areas in Korea. The data were analyzed by HP 3000 computer in the College of Agriculture, Seoul National University. Major statistical techniques used for the study were frequency distrbution, percentile. The results of the study were as follows: 1. Communication exposure of the farmers to the printed media was lower than that of the extension agents, however the level of exposure was considerably high considering limited number of copy for farmers. 2. Farmers' major channel for acquisition of new farming technology was personal communication with extension agents, and extension agents' major channel for advanced technology was printed media. 3. It was revealed that the farmers did not have any difficulty in understanding contents of the printed media. 4. The printed media had been providing long range information for the farmers and extension agents. The farmers and extension agents responded that the consistency in the table of contents and the articles was good, and they liked the idea of emphasis by adopting the box style editing. 5. The farmers responded that the topics of the magazine should reflect the current change in agriculture. 8. The farmers responded that they would like to see articles on horticulture and successful case stories in farming. 9. The farmer-subscriber fully utilized information on farming and rural life in the printed media. Extended distrubution of the printed media would be necessary to enlarge the benefit from the advanced farming technology and improved rural home life.
Reninoma: a rare cause of curable hypertension
Ji-Hye Kim,Ji Hyun Kim,Myung Hyun Cho,Eujin Park,Hye Sun Hyun,Yo Han Ahn,Hee Gyung Kang,Kyung Chul Moon,Il-Soo Ha,Hae Il Cheong 대한소아청소년과학회 2019 Clinical and Experimental Pediatrics (CEP) Vol.62 No.4
The most common type of refractory hypertension found in children is secondary hypertension, which is a potentially curable disease. Reninoma, a renin-secreting juxtaglomerular cell tumor, is a rare cause of severe hypertension that is usually diagnosed in adolescents and young adults. Surgical resection of the tumor completely cures the hypertension of patients with reninoma. The typical clinical presentation of reninoma includes hypokalemia, metabolic alkalosis, and features secondary to the increased activation of the renin-angiotensin system without renal artery stenosis. We report a case of reninoma in a female adolescent with a typical clinical presentation, in which surgical removal of the tumor completely cured hypertension. We discuss here the clinical features, imaging studies, and immunohistochemical examination of the tumor used to establish the diagnosis of reninoma and for the management of the condition.
The Processing Optimization of Caviar Analogs Encapsulated by Calcium-Alginate Gel Membranes
Cheong-Il Ji,Sueng-Mock Cho,Yeun-Suk Gu,Seon-Bong Kim 한국식품과학회 2007 Food Science and Biotechnology Vol.16 No.4
We prepared caviar analogs encapsulated by calcium-alginate gel membranes as a means to replace higher priced natural caviars. Processing the caviar analogs (beluga type) was optimized by response surface methodology with central composite design. Concentrations of sodium alginate (X<sub>1</sub>) and CaCl<sub>2</sub> (X<sub>2</sub>) were chosen as the independent variables. In order to compare characteristics of the caviar analogs with the natural caviar, sphericity (Y<sub>1</sub>), diameter (Y<sub>2</sub>), membrane thickness (Y<sub>3</sub>), rupture strength (Y<sub>4</sub>), rupturing deformation (Y<sub>5</sub>), and sensory score (Y<sub>6</sub>) were used as the dependent variables. The sphericity of the caviar analogs showed a similar value to that of natural caviar (over 94%) in the range of independent variables. Generally, the CaCl<sub>2</sub> concentration (X<sub>2</sub>) affected all dependent variables to a greater extent than the sodium alginate concentration (X<sub>1</sub>). For the multiple response optimization of the 5 dependent variables (Y<sub>1</sub>, Y<sub>2</sub>, Y<sub>4</sub>, Y<sub>5</sub>, and Y<sub>6</sub>), the desirability function was defined as the following conditions: target values (Y<sub>1</sub> = 100%, Y<sub>2</sub> = 3.0 mm, Y<sub>4</sub> = 1,470 g, Y<sub>5</sub> = 1.1 mm, and Y<sub>6</sub> = 10 points). Membrane thickness (Y<sub>3</sub>) was eliminated from the dependent variables for multiple response optimization because it could not be measured with an image analyzer. The values of the independent variables as evaluated by multiple response optimization were X<sub>1</sub> = -0.093 (0.78%) and X<sub>2</sub> = -0.322 (1.07%), respectively.
Ji, Cheong-Il,Cho, Sueng-Mock,Yun, Young-Soo,Kim, Seon-Bong The Korean Society of Fisheries and Aquatic Scienc 2007 Fisheries and Aquatic Sciences Vol.10 No.3
High prices, overfishing, and contamination have limited the availability of natural caviar as a food product. We attempted to apply encapsulation by calcium-alginate gel membranes to caviar analog preparation in an effort to produce a high-quality replacement for natural caviar. Physical conditions of stirring speed $(X_1,\;rpm)$ and gelation time $(X_2,\;min)$ as the independent variables for gelation were optimized by response surface methodology. Sphericity $(Y_1,\;%)$, diameter $(Y_2,\;mm)$, membrane thickness $(Y_3,\;mm)$, rupture strength $(Y_4,\;g)$, and rupturing deformation $(Y_5,\;mm)$ were used as the dependent variables to compare characteristics of the capsules for caviar analogs with natural caviar. The values of the independent variables as evaluated by multiple response optimization were $X_1=-0.1271 (278 rpm) and $X_2=0.4436$ (12.2 min), respectively. Predicted values of the four dependent variables were $Y_1=97.7%,\;Y_2=2.97mm,\;Y_4=1,465g,\;and\;Y_5=1.15mm$. Membrane thickness $(Y_3)$ was eliminated from the dependent variables for multiple response optimization because it could not be measured with an image analyzer. The experimental values prepared under the optimal conditions for verification nearly coincided with the predicted values and satisfied the conditions of natural caviar.
Reninoma: a rare cause of curable hypertension
Kim, Ji Hye,Kim, Ji Hyun,Cho, Myung Hyun,Park, Eujin,Hyun, Hye Sun,Ahn, Yo Han,Kang, Hee Gyung,Moon, Kyung Chul,Ha, Il-Soo,Cheong, Hae Il The Korean Pediatric Society 2019 Clinical and Experimental Pediatrics (CEP) Vol.62 No.4
The most common type of refractory hypertension found in children is secondary hypertension, which is a potentially curable disease. Reninoma, a renin-secreting juxtaglomerular cell tumor, is a rare cause of severe hypertension that is usually diagnosed in adolescents and young adults. Surgical resection of the tumor completely cures the hypertension of patients with reninoma. The typical clinical presentation of reninoma includes hypokalemia, metabolic alkalosis, and features secondary to the increased activation of the renin-angiotensin system without renal artery stenosis. We report a case of reninoma in a female adolescent with a typical clinical presentation, in which surgical removal of the tumor completely cured hypertension. We discuss here the clinical features, imaging studies, and immunohistochemical examination of the tumor used to establish the diagnosis of reninoma and for the management of the condition.
Self-Assembled Fibroblasts-Populated Dermal Equivalent Based on Fibrin Matrix
( Ji Yeon Seo ),( Hyeong In Kim ),( Dong Lim Seol ),( Min Young Choi ),( Young Chul Yoon ),( Soon Ho Cheong ),( Won Hee Jang ),( Young Il Yang ) 한국조직공학·재생의학회 2009 조직공학과 재생의학 Vol.6 No.1
We tried to develop a simple method to fabricate fibrin-based dermal equivalent and determine the effect of culture condition on cell growth and gene expression. Human dermal fibroblasts(DFs) were encapsulated within fibrin and fabricated DFs-populated fibrin lattice(FPFL). In Group I, DFs-populated fibrin lattice(FPFL) was detached from culture plate immediately after polymerization and cultured in free floating(FF) condition for 8 days. In Group II, FPFL was cultured in attached condition for 3 days and then FF condition for 5 days. In Group III, FPFL was cultured in attached condition for 7 days and then cultured in FF condition for 1 day. The cell growth and gene expression were significantly higher in Group III than those of Group I and Group II(p<0.01), but lattice contraction was lowest. We used attached-delayed-released process to fabricate self assembled dermal equivalent. First, FPFL was cultured in attached condition for 7 days and detached in peripheral margin which resulted in contraction and spontaneous release of FPFL. The released FPFL cultured for 1 day for compaction, organization, and self assembly of lattices. We could successfully fabricate a self-assembled dermal equivalent based showing stretchable mechanical property, incorporation of angiogenic factors and newly synthesized extracellular matrices.