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        검색결과 79

        21.
        2017.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study was to investigate the current status of odor and to examine the application method of the odor emission standard in a restaurant environment. The complex odor dilution concentrations (“times”) and odor compounds were measured in 8 restaurants. The highest complex odor dilution times were 966 in outlets and 97 in site boundaries of C restaurants. The average complex odor dilution times were 632 in outlets and 29 in site boundaries, which exceeded the allowable odor discharge standard of residential areas. Eighteen of the 22 specified offensive odor substances were detected. Aldehyde-type substances showed high concentrations, and the highest concentration of ethanol was detected in addition to the designated odorous substances. Dichloromethane, benzene, and phenol, which are harmful air pollutants, were also detected. The odorant concentrations of restaurants were found to exceed the odor standard threshold in A, B, and F restaurants. Upon review of the Japanese-style odor index respective to restaurant odor, it is difficult to apply an equivalent emission allowance standard as the permissible emission standard of the workplace. It is necessary to regulate emission standards by different emission standards. In the future, it will be necessary to determine how to measure the odor index and how to apply the odor emission standard to everyday facilities, such as restaurants, grocery stores, etc.
        5,200원
        23.
        2017.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Juvenile Paralichthys olivaceus (mean length 19.8±2.6 cm, mean weight 97.8±15.8 g) were exposed for 96 hours to different nitrate concentrations of 0, 62.5, 125, 250, 500, 1,000, and 1,500 mg L-1 in biofloc and 0, 62.5, 125, 250, 500, and 1,000 mg L-1 in seawater. Median lethal concentration values (LC50, the concentration at which 50% of mortality occurred after 96 hours of exposure) of nitrate to P. olivaceus in biofloc and seawater were 1,226 and 597 mg NO3 L-1 (P<0.05), respectively, revealing a higher toxicity of nitrate to P. olivaceus in seawater than in biofloc. In hematological parameters, hematocrit level in P. olivaceus exposed to nitrate was significantly increased only at a concentration of 1,000 mg L-1 in biofloc and at concentrations higher than 250 mg L-1 in seawater, but no significant changes in hemoglobin were found in biofloc and seawater. In plasma parameters, aspartate aminotransferase (AST) and alanine aminotransminase (ALT) were significantly increased by nitrate exposure in biofloc and seawater, but no significant changes in alkaline phosphatase (ALP) were found in biofloc and seawater. Results of this study indicate that nitrate exposure to P. olivaceus have a lethal toxic effect and alter hematological and plasma constituents of flatfish P. olivaceus. Given relatively lower toxicity of nitrate in biofloc than in seawater, the use of biofloc in aquaculture may reduce potential toxic effect caused by nitrate in feces and feed residue.
        4,000원
        24.
        2016.04 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Shelter that communication equipment and on-equipment material are mounted on is transported by airplane, vehicle and has a function such as waterproof and shielding EMI. Maintaining proper inside temperature of shelter is important in order to operate equipment. Accordingly proper cooling capacity of cooling equipment which installed on the shelter is important for equipment and operator. To calculate proper cooling capacity, There are some considerations such as environmental factors and equipment in the shelter. In Korea solar irradiation and outdoor temperature is difference in accordance with geological characteristic. Also electric equipment mounted on the shelter is increased by development of technology. But the capacity of air conditioner is not changed thus there is a problem about operating equipment. In this paper, Compare cooling capacity of shelter when using air conditioner that is not enough cooling capacity and calculate proper cooling capacity to consider geological solar irradiation and outdoor temperature.
        4,000원
        25.
        2014.11 구독 인증기관·개인회원 무료
        영지버섯은 두 가지 형태인 녹각형과 편각형이 알려져 있다. 최근 녹각형 영지버섯이 편각형 영지버섯보다 더 많은 양의 β-glucans 및 triterpenoids 가 함유되어있어 편각형 영지버섯보다 더 강한 생리활성이 있다고 제안되었으며, 실제로 녹각형 영지버섯의 추출물을 이용한 항종양활성 연구에서 종양억제의 탁월한 효과가 있다는 것이 보고되었다. 따라서 본 연구에서는 영지버섯(Ganoderma lucidum) 종내 24균주(녹각형 5균주, 편각형 19균주)를 대상으로 미토콘드아 SSU rDNA의 염기서열을 비교 하였고 녹각형과 편각형 영지버섯을 판별할 수 있는 SNP 부위에 대해 분석을 수행하였다. 그 결과, SNP를 포함한 미토콘드리아 SSU rDNA 부위의 단편(499bp)을 증폭하여 HinfI 제한효소를 처리하였을 때 녹각형 영지버섯에서만 369bp와 130bp 크기를 가진 두 개의 제한 단편이 확인되었고 편각형 영지버섯에서는 499bp의 증폭산물이 유지되는 것을 확인하였다. 이에 따라 녹각 형태의 영지버섯의 자실체 발생은 CO2 농도 및 광량뿐만 아니라 유전적인 관련성이 어느 정도 있을 것으로 사료된다.
        26.
        2014.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of the study is to estimate the Green-House-Gas (GHG) emissions from domestic eel farm in the water recirculation system or still-water system by the assessment of energy consumptions and GHG emissions for establishing to reduce standards of GHG from a sustainable perspective. GHG emission components as seeds, feed, fuel, electricity, fixed capital, fish respiration, and others were analysed at the different culture type between water recirculation system and still-water system by 3 stage farm size of small, medium, large scale. The result showed that the mean GHG emission of the eel farm was 18.7kg·CO2 in the stage of production per fish 1kg at different culture type and farm size. Therefore it could be useful for policy, planning, and regulation of aquaculture development with establishing GHG reduction standards.
        4,000원
        27.
        2013.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Mao's awareness about intellectual is very important. Since the founding of the People's Republic of China, Mao’s awareness about Chinese intellectuals has influenced their fate. If so, what did Mao’s awareness about Chinese intellectuals come to get change? To do this, we need to study the issues of Mao’s awareness about Chinese intellectuals from 1920’s. In this paper, studied the issues of Mao’s awareness about Chinese intellectuals until Yanan days. Mao's early recognition of the revolutionary movement was very practical, balanced and had recognized. At that times, Mao’s awareness about Chinese intellectuals is as follows: “Intellectuals of Petit bourgeois are very fluctuating political group. Nevertheless, the revolution can not succeed without intellectuals. So we muse welcome the intellectuals to participate in the revolution.” But in 1942 the works of Yanan, their target of criticism was the wrong choice. Literary criticism is the enemy and must be satire. Intellectuals should be to identify the enemy and friend. Mao’s awareness about the intellectuals have changed from practical aspects to absolute principle.
        6,100원
        28.
        2012.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 농촌진흥청에서 개발한 가축용 동계 사료작물인 청보리 품종별 종실 3종(우호, 영양 및 유연)을 이용하여, 일반성분 및 각종 영양학적 가치분석을 통해 사료가치를 평가하여, 국내 농후사료의 대부분을 차지하고 있는 에너지 사료인 수입옥수수의 대체 가능성을 조사하고자 실시하였고, 이와 함께 비교 할 수 있는 수입대두박(인도산)과 수입옥수수(미국산)를 동일한 조건으로 분석하였다. 일반성분 조사에서 청보리 품종별 종실의 조단백질 함량은 옥수수에 비해 높았고, 조지방 함량은 대두박에 비해 높았다. 대사에너지에서 청보리 품종별 종실이 옥수수 보다는 낮았지만 대두박 보다 높았다. 펩신 소화율(in-vitro)은 대두박이 가장 높았고, 옥수수와 청보리 품종별 종실은 유사하였다. 지방산 조성에서 청보리 종실이 대두박와 옥수수에 비해 포화지방산의 비율은 높고 불포화지방산과 필수지방산은 낮았다. 하지만, 오메가 3 지방산인 리놀렌산(18:3)은 옥수수에 비해 청보리 품종별 종실이 높았다. 구성아미노산에서 청보리 품종별 종실의 Lycine 함량이 대두박에 비해 낮지만, 옥수수에 비해 높았으며, 무기질 함량에서는 청보리 품종별 종실이 대두박에 비해 낮았지만, 옥수수에 비해서는 높았다. 이상의 결과에서 청보리 종실은 수입옥수수를 대체할 가능성이 충분한 것으로 예상되며, 청보리 품종간에서는 큰 차이를 보이지 않았으나, 조단백질 함량과 Lysin 함량이 높고, 대사에너지 함량과 무기질 성분이 풍부한 삼차망(hood spike type)의 유연보리가 가장 좋은 것으로 예상된다.
        4,000원
        29.
        2011.12 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        1-D ZnO nanowires have been attractive for their peculiar properties and easy growth at relatively low temperature. The length, diameter, and density of ZnO nanowires were determined by the several synthetic parameters, such as PEI concentration, growth time, temperature, and zinc salt concentration. The ZnO nanowires were grown on the<001> oriented seed layer using the hydrothermal process with zinc nitrate and HMTA (hexamethylenetetramine) and their structure and optical properties were characterized. The morphology, length and diameter of the nanowires were strongly affected by the relative and/or absolute concentration of Zn2+ and OH-1 and the hydrothermal temperature. When the concentrations of the zinc nitrate HMTA were the same as 0.015 M, the length and diameter of the nanowires were 1.97μm and 0.07μm, respectively, and the aspect ratio was 28.1 with the preferred orientation along the<001> direction. XRD and TEM results showed a high crystallinity of the ZnO nanowires. Optical measurement revealed that ZnO nanowires emitted intensive stimulated UV at 376 nm without showing visible emission related to oxygen defects.
        4,000원
        30.
        2011.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Recent cross-country competition and Chinese steel industry because of the emerging steel industry in Korea is a very difficult situation. Therefore, the steel industry in order to overcome this difficult market environment, the quality, cost competitiveness, enhance customer service levels and enhance international competitiveness through is needed. In this study, the purpose of strengthening the competitiveness of steel companies in order and hit the recovery of raw materials have been developed to optimize the model, developed before and after the results were analyzed. In addition, when applied to other products in order to minimize risk and optimize cutting trial stage of development details of the model is presented in detail. Therefore, the developed model was applied to order the recovery of raw materials hits and significantly improved production planning time has been shortened dramatically. In the present study the contents of other products when properly applied and the competitiveness of companies to improve customer service levels are expected to be helpful.
        4,200원
        31.
        2011.05 구독 인증기관·개인회원 무료
        밑빠진벌레과(Nitidulidae)는 딱정벌레목(Coleoptera)에 속하는 곤충으로 감귤 수확기에 낙과하여 부패하는 과실에 발생하여 부패 과를 섭식하며 살아간다. 본 연구는 감귤과원에 발생하는 밑빠진벌레과의 종 다양성과 연중 발생 시기와 정도 를 구명하고자 2009년 6월부터 2010년 5월까지 제주도 감귤원에서 밑빠진벌레과 발생 및 연간동태를 조사하였다. 낙과하여 부패하는 과실에서 채집한 밑빠진벌레 과 성충을 분리 및 동정한 결과 8종으로 분류․동정 되었으며 이중 2종은 국내 미기 록 종으로 동정되었다. 밑빠진벌레과 8종의 연간 발생에서 애넓적밑빠진벌레 종 만 겨울에 다량 발생하였으며 나머지 7종은 초여름부터 초겨울까지 발생하였다. 밑빠진벌레과 8종에 대한 시기별 종 다양도 관련 지수의 변동에서 종수는 겨울철 에 낮게 나타났으며, 종풍부도는 4월에 가장 높았고 1월 및 2월에 낮았다. Shannon지수는 12월과 1월 ¡‘0’값을 보였고 봄부터 가을까지 생육기에는 1.0에 근접하였다. Hill 지수는 겨울철 12월부터 2월까지 낮았고 생육기에는 2.5 부근에 서 변동하였다. 종균등도는 겨울철인 12월과 1월에 ¡‘0’값을 나타냈고 생육기에는 0.8 정도 값을 보였다. 8종의 발생시기의 유사성을 기준으로 군락분석을 실시한 결 과 유사도 거리 0.5 수준에서 4개 집단으로 분리되었으며, 전체적으로 보았을 때 애넒적밑빠진벌레는 단일 독립집단으로 구분되었다.
        32.
        2011.05 구독 인증기관·개인회원 무료
        화살깍지벌레(Unapsis yanonensis Kuwana) 여름성충의 온도별 산란 및 발생 약충의 발육 특성을 구명하기 위하여 서귀포농업기술센터 시험포장에서 2010년 8 월 감귤 잎에 발생한 성충을 채집하였다. 야외 채집한 성충은 5개 항온기에서 각 온도(13℃, 17℃, 25℃, 29℃, 33℃, 16L8D, RH 30~60%) 처리하여 관찰하였다. 화살깍지벌레는 깍지 내에서 산란 및 부화하여 약충으로 발생하는 특성을 갖고 있 어 잎에 발생한 약충수를 산란수로 조사하였다. 여름성충의 산란기간은 29℃에서 53.1일로 가장 길었으며, 17℃에서는 31.9일, 13℃에서는 33.9일로 조사되었고, 고온조건인 33℃에서 29.0일로 가장 짧았다. 산란 수는 13℃에서 46.5개로 가장 적었으며 저온에서 고온으로 갈수록 증가하여 29℃에서 254.5개로 조사되었으나 33℃에서는 128.1개로 오히려 감소하였다. 한 성충의 산란수는 주기에 따라 증가 및 감소하여 그 경향이 저온인 13℃에서 2회, 그 외 온도에서는 3회 관찰되었다. 1회로부터 마지막 주기까지 각 구간 산란수는 점차 감소하여 29℃의 경우 1회째에 123.2개, 2회째에 84.9개, 3회 이상에서 46.4 개 산란하였다. 발생한 약충의 성비는 1:0.48(13℃), 1:4.85(17℃), 1:2.34(25℃), 1:1.85(29℃), 1:0.56(33℃)로 조사되었다. 온도별 발육실험 결과 약충은 13℃에서 1회 탈피 후 발육하지 못하였고 33℃에 서 2회 탈피하였으나 성충으로 완전히 신장하지 못하였다. 성충까지의 발육기간 은 17℃에서 108.1일, 29℃에서 46.4일, 25℃에서 44.4일이었다.
        33.
        2010.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Today, many companies have introduced an ERP system - an enterprise resources planning - in order to improve corporate credibility through transparent management and for quick responses to market situations through quick decision making. After the construction of an ERP system, many companies are having difficulty in calculating the appropriate number of personnel required for running the system because of a lack of standard for doing so, as well as a lack of pertinent procedures. As a result, the companies are having to resort to a trial-and-error approach. Therefore this paper studied a model for calculating the appropriate number of personnel required for efficiently running an ERP system after its construction, as well as for constantly meeting its performance targets. The developed model was applied empirically to calculate an appropriate number of personnel required, and an organization was set up according to this. Therefore, the purpose of this study was to present an optimized model for calculating the number of personnel required for operating an ERP system, that which addresses problems of existing models, in order to help companies organize the operation personnel and its size, as well as to provide more objectivity to the calculated number of personnel required and to improve credibility.
        4,000원
        34.
        2010.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The company protects the information of legacy system to satisfy all member in company. Integrating between applications is increasing recently because of e-Business activation. The e-Business activation also make between extra companies and intra companies integrated. This paper suggest on implementing the ERP using Phased Approach Method and the EAI(Enterprise Application Integration) with legacy system. This paper also suggest the standard method which would be used in implementing the EAI in another company and reduce the mistake during the EAI project. Therefore, it would be the one system between complicated systems through application integration, it would be also make shop floors visualized. This research would help users and service suppliers getting more advantages of e-Business system.
        4,000원
        35.
        2010.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Guillain-Barré syndrome (GBS) is the most common cause of acute flaccid paralysis and autoimmune polyradiculoneuropathy. Campylobacter jejuni is the most commonly identified infectious trigger for GBS. A sialic-acid containing lipopolysaccharide (LPS) of Campylobacter is thought to be involved in the triggering of GBS. The galE (UDPgalactoset- epimerase) gene of Campylobacter spp. is involved in the synthesis of LPS. In this study, we detected the galE gene in Campylobacter spp. responsible for triggering the onset of GBS. The PCR assay detected the presence of the gene in 14 of the 25 (56%) Campylobacter isolates from domestic chicken, 20 of the 28 (71.4%) Campylobacter isolates from imported chicken and 50 of the 51 (98%) Campylobacter isolates from human clinical samples. Also, the specific 497-bp region of galE sequence in Campylobacters responsible for triggering the onset of GBS was amplified from GBS patient. These results could provide evidence of the first GBS-related C. jejuni infection in Korea.
        4,000원
        36.
        2010.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Phenolic acid concentrates of rice bran(RB-ex) and hydroxycinnamic acids were investigated for their anti-hyperglycemic activities through glucose uptake and glucokinase activity using HepG2 cells and stimulatory effects on insulin secretion using HIT-TI5 cells. RB-ex was prepared as an ethylacetate extract after alkaline hydrolysis and hydroxycinnamic acids, found as major compositions of RB-ex, such as ferulic acid(FA), sinapic acid(SA) and p-coumaric acid(p-CA) were investigated to compare with the properties of RB-ex. The properties of glucose uptake in HepG2 cells were examined in the absence of insulin and two different glucose concentrations(5.5 mM and 25 mM). RB-ex and FA showed anti-hyperglycemic activities through the increase of glucose uptake and the stimulation of glucokinase activity in HepG2 cells. RB-ex exhibited higher glucose uptakes with higher glucose concentrations, whereas FA exhibited the same increasing effects on both concentrations of glucose. RB-ex and FA exhibited doubled glucokinase activities relative to control. In the presence of insulin in the 25 mM glucose-containing medium, the levels of glucose uptake were increased in all treatments compared with control. As stimulatory effects of samples on insulin secretion were estimated, RB-ex and FA stimulated insulin secretion at a concentration of 25㎕/㎖ and in particular, FA showed the highest amount of insulin-release in HIT-TI5 cells. Antioxidative effects on BIT-TI5 cells, RB-ex and hydroxycinnamic acids, excluding p-CA, showed inhibitory activities of 78% to 80% at a concentration of 100㎕㎖. On the basis of these results, we conclude that RB-ex and FA could help decrease blood glucose levels and prevent the cell damages via antioxidant activity.
        4,000원
        38.
        2009.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 산지황폐계류에 시공한 사방공작물이 계곡생태계에 미치는 영향을 분석하고자 시공 전후를 기준으로 조사지점별로 저서성 대형무척추동물의 출현종의 변화분석 및 생물학적 수질평가를 실시하였으며, 그 결과는 다음과 같다. 시공 전 출현한 저서성 대형무척추동물의 총 수는 4문 6강 11목 22과 25종 3,086개체였으나 시공 후 조사에서는 4문 6강 10목 17과 19종 1,208개체로 감소하였다. 특히, 직접적인 사방공작물의 시공이 이루어진 조사지점에서는 시공 후 생물종이 전혀 출현하지 않거나, 극소량만이 채집되어 서식종의 현존량을 기초로 하는 다양도 지수, 풍부도 지수, 균등도 지수가 감소 또는 산출되지 않았다. 저서생물의 군집분석 결과 및 저서성 대형무척추동물의 생태점수(ESB)는 모든 조사지점에서 시공전보다 시공 후에 오수생물계열, 환경상태, 수질등급과 같은 계곡환경질이 저하된 것으로 나타났다. 즉, 시공전 상류는 양호 및 다소 양호, 중류는 다소 불량, 하류는 불량 및 매우 불량으로 분석되었으나, 시공 후 상류 일부 지역을 제외한 나머지 수역은 매우 불량으로 분석되었다. 또한 대상 계류의 수질등급의 경우 시공 전에는 I~III등급 사이로 분류되었으나, 시공 후 대조군을 제외하고는 모두 IV~V등급으로 악화되었다 이와 같이 사방공작물의 시공후 모든 조사지점에서 발생한 저서성 대형무척추동물의 서식 환경 파괴는 개체수의 감소와 수질악화로 이어졌다. 이 결과는 사방공작물의 시공 직후에 조사 분석한 것이므로, 향후 장기간의 모니터링을 통하여 시공한 사방공작물의 재해방지 효과와 함께 계류 생태계의 회복과정에 대한 지속적인 연구가 이루어져야 할 것이다.
        4,300원
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