• Korean Journal of Animal Reproduction
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• v.11 no.3
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• pp.196-205
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• 1987

This study was conducted in order to obtain the informatin of the histochemical changes in each of 6 segments of the epididymal ducts in 32 Korean native male goats. The male goats were examined, dividing into 7 groups, at 4 잔 intervlas from 8 to 32 wks of age. The reuslts obtained were as follows: 1. PAS reaction showed positive on the basal and upper part beyond the nucleus of the peithelium of effernt ductules throughout all the classes of age. It was also positive on the free border and basal and upper part beyond the nucleus of the caput, on the free border andbasal parts of the corpus, and on the basal part of the cauda of the epididymal epithelium. 2. Acid phosphatase reaction was negative on the every part of epididymal epithelium at the age of 8 weeks, however, with the aging it became strangly positive on the areas between the free border and the nucleus, and moderately positive on the basal part of epithelium of the caput and corpus. In the free border adn basal part of the cauda, it was slightly positive. alkaline phosphatase reactin was negative on the every part of epididymal epithelium until 12 weeks of age. From 16 weeks, free border of epididymal epithelium becaqme slightly positive, and from 20 weeks, the reaction became stronger on the basal part but weekend on the free border with the aging. 3. In the sudan black B staining, many blue black granules between the free border and the nucleus, some granules on the basal part, and a few granules on the cytoplasm around the nucleus of the epididymal epithelium were observed from 8 weeks of age as early, and the granules were increased in number with the aging. 4. In Azan staining, reddish violet granules below the nucleus and blue granules on the upper part beyond the nucleus in some cells of epithelia of efferent ductules were noted at 12th and 16th week, and after 24th week, the granules were decreased with the aging. Golgi apparatus were clearly observable on the upper part beyond the nucleus of all parts of epididymal epithelium from 8th week, and also number of intracytoplasmic vacuoles(smaller ones on the upper part and larger ones on the basal part beyond the nucleus) and fine granules were increased with the aging. 5. In the toluidin blue staining, reddish purple granules on the basal part of the epithelium in all the parts of epididymal ducts, particularly brilliant in the cauda, were observed from 8th week as early. 6. In the Cowdry staining, numerous mitochondria, according to aging, were observed between the free border of epithelium and the upper part beyond the nucleus particularly in the catus and corpus of the epididymal ducts.

• Journal of the East Asian Society of Dietary Life
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• v.24 no.4
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• pp.514-528
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• 2014

This study examined the actual state and future improvement of food allergies in adolescents and adults in order to prevent damage. In this survey, proportions of females, people in their 40s, college graduates, and office workers and housewives with allergies were higher than other groups. Exactly 41.1% of participants responded that they had experienced food allergies while 58.9% responded that they had not. According to their responses, the most common food allergy symptom involved the skin while whole-body allergic reactions were rare. Most respondents answered that frequency of their food allergies was two or three times. There was a variety of allergenic foods, including fast food, eggs, mackerel and milk, and instant food was ranked as the most allergenic food. Therefore, in order to protect consumers from damage caused by food allergens, the food allergen labeling system must be improved. A better food allergen labeling system should be implemented to avoid potential risks of allergic reactions and ensure national food safety.

• The Journal of the Korea Contents Association
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• v.20 no.6
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• pp.326-341
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• 2020

Based on theoretical background of Situational Theory of Problem Solving(STOPS), we have examined the role of STOPS variables on a group of online public in their issue recognition and communicative behavior on Korea's nationwide civil boycott movement of Japanese goods. Results from 524 survey cases from a Korea's major online community show that two independent variables(Problem Recognition, Referent Criterion) revealed positive in their effect on mediating variable(Situational Motivation in Problem Solving). Situational Motivation also revealed positive in its effect on six dependent variables(Information Forefending, Information Permitting, Information Forwarding, Information Sharing, Information Seeking, Information Attending) of Communicative Behavior. Involvement Recognition and Constraint Recognition revealed positive without proper statistical significance. As a result, study on the case of online public in Korea supports STOPS theory as high-level of Problem Recognition and Referent Criterion effects on Communicative Behavior in positive way via Situational Motivation. Implications from the findings have discussed and proposed suggestions for government public relations and further studies.

• Journal of Navigation and Port Research
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• v.40 no.6
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• pp.459-468
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• 2016

The decreasing number of import and export containers is causing a problem with container circulation. In particular, this problem has reached a serious level in the Gyeongin area. Empty containers are accumulating in the Gyeongin container yard, where most of the returned containers are stored. In order to improve the empty container return problem at Gyeonhin, this study analyzes the actual situation and the empty container return process. A preference survey was conducted to suggest solutions from the perspective of users rather than shippers. A logistics company's data was analyzed to identify the inefficient cost structure in the Gyeongin area. The results show that the empty container return problem in Gyeongin is becoming more and more serious. To solve this problem, this paper proposes reestablishing functions at the Incheon Port, and securing a third new storage terminal in the Gyeongin area. Finally, an efficient empty container circulation system is presented. It will also be necessary to prepare laws and institutions to ensure these solutions.

• The Korean Journal of Pesticide Science
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• v.5 no.4
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• pp.45-49
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• 2001

As a series of studies to develop pest management system for sweet persimmon production matched with the quarantine criterion of sweet persimmon-imported county, a survey was conducted by questionnaire on pest management practice and scheme of increasing income in sweet persimmon farms in Korea. Above 80% of sweet persimmon farmers was over fifties in age. The greatest limiting factor for sweet persimmon production was thought to be disease by the farmers. Percentage of farmers who answered that the most important pest is anthracnose cause by Gloeosporium kaki, and stink bugs was 64.6% and 73.5%, respectively. In particular, the farmers did not consider Dichocrocis punctiferalis, a main targer insect for quarantine in USA, as serious problem. Obtaining information on pest management practice or decision-making on both selection of pesticide and time of pesticide application depended highly on their own experience with the highest proportion. Eight to nine times of pesticide applications a year was highest among farms with 56.6%. More than 80% of farmers recorded the diary of pesticide application. farmers considered increasing cost for pest management as the greatest problem with 35.4% in proportion, and 34.5% of farmers pointed out that increase in export is essential for increasing farm income with highest proportion.

• 전기의세계
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• v.41 no.12
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• pp.21-30
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• 1992

내연기관의 가솔린자동차보다 역사가 오래된 전기자동차는 상대적으로 주생성능과 가격 경쟁력의 열세로 그 자취를 감추었고 최근까지 주로 특수목적의 단거리 저속차량으로 사용되고 있다. 그러나 1890년대 후반부터 전세계가 자동차배기가스에 의한 대기오염과 지구온난화 현상등의 문제를 심각하게 공감하게 되었고 마침내 미국 캘리포니아주에서는 전가자동차의 강제판매를 규정화하게 이르렀다. 이 규정에 의하면 1998년도부터 차량 판매대수의 2%를 전기자동차 판매로 강제요구하고 있다. 이 비율은 2000녀도에 5% 2003년에는 10%로 늘어날 계획이다. 따라서 미국에 많은 자동차를 수출하고 있는 일본, 독일 및 여러 유럽국가에서는 이 사업에 막대한 자금을 투자하며 개발에 몰두하고 있다. 미국의 Big3도 에너지성의 도움으로 최근 USABC를 결성하여 전기자동차 개발에 박차를 가하고 있다. 지금까지 기존의 가솔린자동차 기술에 있어서 일본과 독일에 상대적 열세에 있었던 미국도 이번 캘리포니아주의 전기자동차 강제판매 규정에 따른 전기자동차 사업으로 미국자동차 시장의 새로운 판도를 조성하겠다는 의도인듯하다. 국내에서도 정부가 이 사업의 중요성을 심각히 인식하고 G7사업과제의 하나로 선정하여 산, 학, 연 각층의 전문가가 참여하여 성공적으로 개발을 마칠 수 있도록 적극 지원하고 있다. 지금까지의 평균주행성능을 보면 최고속도 100-120km/h, 일층전 최대주행거리 150-200km 정도이며, 아직 양산체제에 돌입하지 않았기 때문에 가격면에서 경쟁력이 없는 실정이다. 그러나 1990년도에 들면서 각종 요소부품들의 기술수준이 급성장을 이루어서 앞으로 10년정도 후면 성능과 가격면에서 가솔린자동차와 대등한 수준의 전기자동차 개발이 실현될 수 있으리라 예측된다.는 영향받지 않았다. Clonidine의 심박수 감소작용은 .뇌실내및 정맥내 diltiazem이나 nifedipine 처리후에 감약되었다. 5). 뇌실내 clonidine$(30{\mu}g)$ 처 리후 뇌실내 diltiazem$(400{\mu}g)$과 nifedipine$(350{\mu}g)$의 혈압하강및 심박수 감소효과는 영향 받지 않고 그대로 나타났다. 이상의 결과로 diltiazem과 nifedipine은 가토뇌내에서 methoxamine에 의한 혈압상승의 작용점인 alrfia-1 adrenoceptor의 흥분에는 영향을 미치지 못하나 clonidine의 작용점인 alpha-2 adrenoceptor의 흥분에 의한 혈압하강및 심박수 감소효과는 억제한다고 추론하였다.thin 함량은 110.6 mg/L로서 산업적인 생산성이 있는 것으로 나타났다. 이번 연구를 통하여 개발된 변이주 B76 및 이의 대량 발효를 위한 최종조건의 정립은 향후 astaxanthin의 산업적 생산공정에 필요한 기초자료로 이용될 것으로 기대된다.색총말내에 소형의 도형, 소형의 장형 연접소포 및 DENSE CORE VESICLE의 3가지 연접소포를 가지고 있었고 출현빈도수는 촉각엽에서 가장 큰 33%이었다. 제5형 신경연접은 축색종말내에 중등도크기의 원형, 대형의 원형연접소포 및 DENSE CORE VESICLE을 포함하였고 13%의 출현빈도수로 관찰되었다. 배추횐나비의 촉각에 있는 지각신경세포가 뇌의 촉각엽으로 뻗어 들어가 위의 5가지 신경연접중 어느 형을 형성하는지를 관찰하기 위하여 좌측 촉각의 기부를 제거하여 지각신경세포를 절단하였는데 그 결과, 좌측 촉각엽에서 제4형의 신경연접이 퇴행성 변화를 나타내었다.

• Journal of Korean Society of Forest Science
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• v.88 no.2
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• pp.157-168
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• 1999

This paper analyzed vegetation and land use classification, slope and permanent preservation and legal reserves on the farm Jangada and Jamaica-Mato Grosso do Sul, Brazil, using satellite image for assisting the planning of planting Eucalyptus spp. This part of the State of Mato Grosso do Sul represents an important geopolitcal area, since it is located on the borders of Bolivia and Paraguay. Also exportation of goods can be achieved through hydrovias extending to Buenos Aires, Argentina-through the Paraguay River. Also there are road and railroad connection which link the soutreastern part of Brazil to the Andean countries. The vegetation map from sheet SF 21-Campo Grande of the RADAMBRASIL Project was used as the basis for the preliminary interpretation of coverage, and complemented by a visit of the field. After the initial interpretation of the image, definition of classes of use and land occupation were made, and files of spectral signatures were created. On the farms Jamaica and Jangada Open Arboreal Savanna and Grass Savanna are the predominant physiognomies occupying 68% of total area. In spite of the results being satisfactory at the present moment, the development of this project should be revised and adjusted based on the evaluations already made, including a greater detailing of environmental components, principally with respect to soil and topography.

• Applied Microscopy
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• v.41 no.1
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• pp.37-45
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• 2011

Known as a female hormone, estrogen, has an effect on the male reproductive organs. The estrogen has to combine with the estrogen receptor to communicate a signal. Propyl pyrazole triol (PPT) is an estrogen receptor alpha selective agonist with a 410-, or 1,000-fold relative binding affinity for estrogen receptor alpha versus estrogen receptor beta. In this study, adult male mice were treated weekly with subcutaneously injections of PPT (0.01 mg, 0.1 mg, 1mg and 4 mg) suspended in castor oil (as control) for 8 weeks and observed histologically changes in testis, efferent ductule and epididymis. In the high concentrations of PPT 4 mg treatment group, a remarkable reduction was observed in the weight of the body, testis and epididymis. Microscopic examination revealed a reduction in seminiferous tubular diameter of the testis, and epithelial cell height of the epididymis in treated group during the experiment. In addition, as the diameter of the efferent ductule increased gradually, the height of epithelial cells was decreased. PPT 4 mg treatment group caused inhibition of spermatogenesis due to atrophied germinal epithelium in the testis, and decrease of adipocyte size attached to the epididymis. Sperm was not observed in the caudal epididymis of PPT 4 mg treated group. In conclusion, the injection of high concentrations of PPT into adult male mice induced physiological changes, such as an inhibition of spermatogenesis, and also histological changes within the reproductive organs.

• Food Science of Animal Resources
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• v.22 no.1
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• pp.30-36
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• 2002

As meat consumption increases, consumers have demanded meat products containing functional ingredients which beneficial health effect rather than a normal food. The objective of this study was to investigate the physico-chemical and sensory properties of pork Bulgogi product(PB) containing different concentrations of ground ginseng such as 0%, 0.5%, 1.0% and 2.0%. The cooked PB containing ground ginseng had low TBA values when stored at 5$\^{C}$ for 7 days and showed high L and b values (CIE) in meat color when compared to those of control. The PB containing ground ginseng had lower scores in hardness than control, but there were no significant differences in cohesiveness, springness, and chewiness. In fatty acid compositions, the percentages of PUFA/SFA were highest in the PB containing 2% of ground ginseng. The sensory panels preferred PB containing ground ginseng in flavor, tenderness, juiciness and overall acceptability to those of control. In conclusion, the addition of ginseng enhanced flavor and palatability of PB without any adverse effect on meat quality.

• Journal of the Korean Geographical Society
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• v.29 no.4
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• pp.377-401
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• 1994

This study examines the impact of national economic restructuring on regional development patterns. Korea's development over the last decade has been characterized by a rapid economic restructuring towards the information economy. This economic restructuring has had significant impacts on regional development patterns. The most remarkable feature is a clear coreperiphery disparity in terms of levels of informatization. Seoul showed an extraordinarily high level of informatization. The process of regional development in the information era is marked by an intensified spatial division of labor, which articulates with the pre-existing pattern of regional disparity. Information infrastructrue improvements for regional development do not necessarily result in reductions in regional unevenness. There is an urgent need to develop the integrated regional informatization strategy.