• Journal of Nutrition and Health
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• 제18권3호
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• pp.234-241
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• 1985

사료(飼料) 단백질(蛋白質)의 질(質)을 향상시키기 위해 미생물(微生物)을 배양(培養)하여 제조한 발효사료(醱酵飼料)의 질적(質的)인 개선효과를 알아보고자 밀기울에 Aspergillus oryzae를 배양(培養)한 발효(醱酵)밀기울을 제조하여 그 화학적(化學的) 조성(組成)과 동시에 쥐 사료(飼料)에 첨가한 후 사육하여 성장률(成長率)과 사료효율을 측정하였으며, NPU, PER 및 NPR과 같은 단백질(蛋白質)의 생물학적(生物學的) 이용성(利用成)을 조사하여 다음과 같은 결과(結果)를 얻었다. 1) 발효(醱酵)밀기울의 제조과정 중에 밀기울건물(乾物)의 절대량이 15% 감소되었다. 2) 발효(醱酵)밀기울의 일반성분(一般成分)은 원료인 밀기울에 비해 조(粗)단백질, 조(粗)섬유, 조(粗)회분 및 조(粗)지방은 증가하였고 가용성무실소물(可溶性無室素物)은 감소하였으며 amino-nitrogen과 riboflavin의 함량은 각각 3.6배와 12배씩 현저히 증가되었다. 아미노산 함량은 발효(醱酵)밀기울에서 18.6% 증가 하였다. 3) 쥐의 사료(飼料) 섭취량(攝取量)과 체중(體重) 증가량(增加量)에서는 각 군간에 별다른 차이가 나타나지 않았으며, 사료효율은 모든 FWB군이 50% WB군보다 좋았으나 통계적 유의성(有意性)은 없었다. 4) 대체적으로 모든 FWB군은 50% WB군보다 PER, NPR 및 NPU수치가 높은 경향(傾向)이었는데 그 중(中) 50% FWB군의 NPU 수치는 100% Casein 군과는 거의 유사하고 50% WB군에 비해서는 유의(有意)하게 더 높았다(P< 0.05).

• 한국조경학회지
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• 제42권1호
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• pp.50-63
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• 2014

생태관광은 환경보전과 지역활성화를 동시에 만족시키는 지속가능한 개발의 대표유형으로 각광을 받고 있다. 생태관광의 긍정적인 환경적, 사회문화적 영향에 대한 연구결과는 발표되고 있으나, 실제 경제적 가치에 대해서는 긍정적 의견과 부정적 의견이 엇갈리고 있으며, 경제적 효과를 높이기 위한 요인에 대한 연구는 거의 이루어지지 않았다. 이에 본 연구에서는 한국 생태관광지 중 가장 많은 방문객수를 기록하고 있는 순천만의 실제 방문객 314명을 대상으로 관광행태와 태도, 그리고 만족도가 그들의 소비활동과 어떤 연관성을 가지는지 분석하였다. 그 결과는 다음과 같다. 첫째, 연계관광 유무, 생태관광 경험 유무, 방문 전 순천만 생태관광에 대한 정보유무는 관광소비활동에 영향을 미쳤으며, 특히 관광소비활동 중 숙박비 지출과 관광행태와의 유의성이 가장 높은 것으로 나타났다. 둘째, 개별관광객(FIT)은 단체관광객보다 적극적인 관광태도를 가지고 있으며 숙박비, 체험 프로그램 이용비 지출이 높은 것으로 나타났다. 셋째, 순천만 관광객은 환경적, 사회문화적, 경제적 순으로 긍정적인 태도를 보였으며, 긍정적인 태도를 지닌 관광객의 체험 프로그램 참여가 높았다. 또한 프로그램 참여자의 기부 의사가 높고, 만족도 또한 가장 높았다. 생태관광객의 지역경제 기여도를 높이기 위해 단체관광보다는 개별관광을 유도하고, 생태관광 체험 프로그램 참여를 독려하는 것이 요구되며, 주변 관광자원과의 연계, 다양한 체험 프로그램 개발, 적극적인 정보 전달과 사전교육의 필요성이 고찰되었다.

• 한국지역지리학회지
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• 제1권1호
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• pp.45-60
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• 1995

한국의 온대저기압성 강수에 대하여 10년간(1981년$\sim$1990년) 60개 지점의 저기압성 강수와 관련된 43개 강수자료를 이용하여 지역구분을 시도하였다. 먼저 인자분석(因子分析)을 통하여 요인별 고유치를 분석하여 인자점수(因子點數)의 지역분포를 고찰한 후, 군집분석의 Ward법을 적용하여 강수지역을 구분하고 구분지역별로 강수특성을 고찰하였다. 온대저기압성 강수와 관련된 43개 변수를 이용한 인자분석(因子分析)에서 고유치(固有値)가 1.0이상의 요인은 7개이며, 전변동량(全變動量)의 86%를 설명한다. 제1요인은 중서부지역의 강수특성을 설명해주며 기여율이 40.9%로 가장 높게 나타났다. 군집(群集)분석의 Ward법에 의한 한궁의 온대저기압성 강수지역은 (1) 경기 영서북부지역 (2) 영동 울릉도지역 (3) 호서 영서남부지역 (4) 호남 북서제주지역 (5) 남동제주지역 (6) 영남북부지역 (7) 영남남부지역 등 7개의 대지역과, 22개 중지역으로 구분되었다. 더불어 강수지역의 경계선 설정에는 저기압의 이동경로와 유일기류의 방향, 산맥의 주향(走向) 등이 많은 영향을 주고 있음을 알 수 있었다.

• 한국토양비료학회지
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• 제49권6호
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• pp.751-759
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• 2016

It is known that the poor soil fertility of newly reclaimed saline soils is due to the lack of organic matter and available mineral nutrients for crop production. The effect of green manuring with Sesbania aculeata in combination with five rates of urea-N treatments (N0. N25, N50, N75, N100) on the productivity of a subsequent whole-crop barley and the fertility of the reclaimed saline soil in Saemangeum was evaluated in the field during 2013-2014 growing season. Sesbania was grown during summer season (June to October). The amount of Sesbania incorporated was $16.2Mg\;ha^{-1}$. Sesbania contributed to $393kg\;N\;ha^{-1}$ to the soils when ploughed down and incorporated before whole-crop barley cultivated. The performances of whole-crop barley following sesbania incorporation were significantly affected by a combination of Sesbania manuring and different N rates. The N fertilizer equivalence without N fertilizer following Sesbania was 42.6% ($63.9kg\;N\;ha^{-1}$), compared with N100 ($150kg\;N\;ha^{-1}$) in fallow soils. The whole-crop barley yield responded to N fertilizer rates in both sesbania-amended and fallow soil. The yield response to nitrogen rates in fallow soil was linear (Y=0.0586X+3.3011, $R^2=0.9534$), whereas that in sesbania-amended soils was quadratic (Y= -0.001X2+0.1322X+5.7143, $R^2=0.9576$). The yield of whole-crop barley in sesbania-amended with increasing N rates was increased up to SN75 (115 kgN) $10.3Mg\;ha^{-1}$. Apparent N recovery (ANR) of whole-crop barely showed decreased with sesbania plus increasing rates of N fertilizer. Despite higher yield with sesbania manuring plus increasing N rates, the contributions of N from Sesbania with increasing N rates to whole-crop barley were decreased, whereas those from fertilizer increment due to excessively mineralized Nitrogen. Considering yield, ANR, N contribution from Sesbania and nitrogen fertilizer, the optimum N rate was N50 rate following sesbania incorporation.

• 한국병원경영학회지
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• 제5권1호
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• pp.129-155
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• 2000

This empirical study, activity-based costing, a newly introduced approach that has proved to be an improvement over the conventional costing system in product or service costing, is applied at department of clinical pathology in K university hospital. The study subjects were 233 test procedures done in clinical laboratory of K university hospital. Activity analysis was done by interview, questionnaires, and time study, and the amount of resources consumed by each activity and their costs are then traced and applied to the laboratory tests. The main purpose of this study were to compare the test costs of activity-bases costing with those of conventional costing, and test fees of medical insurance, and to provide accurate cost informations for the decision makers of hospital. The major findings of this study were as belows. 1. The cost drivers for application of activity-based costing at clinical laboratory were cases of sample collection, case of specimen, cases of test, and volume-related allocation bases such as direct labor hours and total revenue of each test. 2. The profits of each clinical laboratory fields analyzed by conventional costing were different from the profits analyzed by activity-based costing, especially in the field of Urinalysis(approximately over estimated 750%). 3. The standard full costs by conventional costing were quite different from the costs computed by using activity-based costing, and the difference is most significant with the tests of long labor time. 4. From the comparison between costs computed by using activity-based costing and medical insurance fees, some test fees were significantly lower than the costs, especially in the non-automated fields. As described in this study, activity-based costing provides more accurate cost information than does conventional costing system. The former approach is especially important in the health care industry including hospitals in which planning and controlling the costs services provided are the key to maintaining a healthy financial status for the organization. Despite the contribution of activity-based costing the economic as well as technical feasibilities of implementing such a cost accounting system in an organization must be evaluated. In the development of activity-based costing systems, an activity analysis has to be conducted to identify activities that consume resources. This involves a detailed study of the organization's logistics and accounting information systems, and it is an expensive project in itself. Besides, it can be quite difficult and time consuming to identify and trace resource consumption to a specific activity. Thus the activity-based costing system should be implemented only when the decrease in cost of error far exceeds the increase in cost of measurement. By combining activity-based costing with standard costing, health care administrators can better plan and control the costs of health services provided while ensuring that the organization's bottom line is healthy.

• 한국산림과학회지
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• 제107권1호
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• pp.59-70
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• 2018

본 연구는 도시생활권의 특성을 고려한 재해예방용 사방댐을 개발하고, 현장에서의 활용성을 검토하기 위하여 안정성 및 기능성을 평가하는 것을 목적으로 하고 있다. 필러와 바닥스크린을 활용한 토석류 방재댐과 수제를 활용한 토석류 제어댐 등 복합형 사방댐 2종을 개발하였고, 각 구조물의 정적(활동, 전도, 지지) 및 동적(부재력) 안정성을 검토하였다. 그 결과, 각 검토항목별로 충격력에 대한 안정성에 미달하는 경우도 일부 나타났으나, 대부분 항목에서 기준 안전율을 만족하는 것으로 나타났다. 또한, 개발된 사방댐을 토대로 축소모형을 제작하여 수로실험을 실시한 결과, 사방댐을 설치하지 않은 대조구에 비교하여 유하물의 퇴적범위와 퇴적속도를 감소시켰고, 포착율은 평균적으로 3.5배 증가하는 것으로 나타났다. 추후 수행될 다양한 조건에서의 수로실험 결과를 바탕으로 개발된 도시생활권형 사방댐의 기능을 보다 정량적으로 구체화 할 수 있다면, 이를 도시생활권에 활용하여 산지토사재해 피해를 효과적으로 저감할 수 있을 것으로 기대되었다.

• 생태와환경
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• 제34권3호통권95호
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• pp.166-174
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• 2001

소양호로 유입되는 유기탄소량을 측정하였으며, 유기탄소 부하량에 대한 유기물 기원의 기여도를 계산하기위해서 내부생성유기탄소와 외부기원유기탄소를 측정하였다. 내부생성유기탄소는 EOC를 고려한 식물플랑크톤의 1차생산력으로부터 계산하였으며, 외부기원유기탄소는 유입수의 유기탄소 농도와 양어장의 유기탄소 배출량으로부터 구하였다. 1차생산력은 가두리 양식장이 설치된 1987견부터 증가하여 1995견가지 높은 분포를 보였으며 가두리가 철거된 1998년 이후 급격히 감소하였다. 내부생성유기탄소와 외부기원유기탄소의 부하는 여름철에 집중되었으며, 7${\sim}$9월에 연간 부하량의 43.2%와 71.7%가 각각 유입되었다. 1차생산력은 여름철에 $1,000\;mgC\;m^{-2}\;d^{-1}$ 이상으로 증가하였으며 겨울철에 비교적낮았다. 식물플랑크톤의 EOC배출율도 1차생산이 증가하여 수체의 DOC농도가 높은 여름철에 높았다. 전체조사기간동안 내부생성과 외부기원유기물의 평균적인 기여도는 각각 총부하량의 53.6%와 46.4%를 차지하였다. EOC 배출율은 1차생산력의 4.4${\sim}$21.2%를 차지하였으며, 1차생산력 산정에서 식물플랑크톤의 EOC 배출율이 고려되어야 할 것으로 보인다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.351-351
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• 2017

Arbuscular mycorrhizal fungi (AMF) are particular soil fungi that benefit many crops and require a symbiosis with plant roots to survive. In our previous study, there was a positive correlation between AMF root colonization and soybean grain yield in a four-year consecutive winter cover crop-soybean rotational system without phosphorus fertilizer. It is suggested that higher AMF root colonization can be a better solution for improving soybean growth and grain yield in P-limited soil. Our purpose in this study was to test the hypothesis that a P application is the main factor improving soybean growth, P nutrition and grain yield, and the benefit from AMF to soybean P uptake and growth in a P-limited soil. Impact of a P application on AMF root colonization and communities in soybean roots and their potential contribution to soybean growth and P nutrition under a five-year P-unfertilized crop rotational system were investigated over two-years. In this study, four cover crop treatments included 1) wheat (Triticum aestivum); 2) red clover (Trifolium pratense); 3) rapeseed (Brassica napus); and 4) fallow in the crop rotation. The amount of triple superphosphate as a P fertilizer applied rate after cultivation of cover crops was 120 and $360k\;ha^{-1}$ in 2014 and 2015, respectively. Soybean roots were sampled at full-flowering and analyzed for AMF communities using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) and quantitative real-time PCR (qPCR) techniques. The AMF root colonization in the soybean roots at full bloom stage was significantly influenced by cover crop and P application throughout the two-year rotation. The two-year rotation of different cover crops or fallow impacted the molecular diversity of AMF communities colonizing roots of soybean. Redundancy analysis (RDA) indicated that AMF communities colonizing roots of soybean were significantly different among cover crop rotations. The AMF communities colonizing roots of soybean were clearly influenced by a P application in the two-year trial. Moreover, a P application may have positively impacts on the AMF communities under P-deficit soil due to the continuous cover crop-soybean rotational system without a P fertilizer.

• 한국환경농학회지
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• 제28권3호
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• pp.233-237
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• 2009

It has widely been observed that the effect of elevating atmospheric $CO_2$ concentrations on rice productivity depends largely on soil N availabilities. However, the responses of ammonia volatilization from flooded paddy soil that is an important pathway of N loss and thus affecting fertilizer N availability to concomitant increases in atmospheric $CO_2$ and temperature has rarely been studied. In this paper, we first report the interactive effect of elevated $CO_2$ and temperature on ammonia volatilization from rice paddy soils applied with urea. Urea labeled with $^{15}N$ was used to quantitatively estimate the contribution of applied urea-N to total ammonia volatilization. This study was conducted using Temperature Gradient Chambers (TGCs) with two $CO_2$ levels [ambient $CO_2$ (AC), 383 ppmv and elevated $CO_2$ (EC), 645 ppmv] as whole-plot treatment (main treatment) and two temperature levels [ambient temperature (AT), $25.7^{\circ}C$ and elevated temperature (ET), $27.8^{\circ}C$] as split-plot treatments (sub-treatment) with triplicates. Elevated temperature increased ammonia volatilization probably due to a shift of chemical equilibrium toward $NH_3$ production via enhanced hydrolysis of urea to $NH_3$ of which rate is dependent on temperature. Meanwhile, elevated $CO_2$ decreased ammonia volatilization and that could be attributed to increased rhizosphere biomass that assimilates $NH_4^+$ otherwise being lost via volatilization. Such opposite effects of elevated temperature and $CO_2$ resulted in the accumulated amount of ammonia volatilization in the order of ACET>ACAT>ECET>ECAT. The pattern of ammonia volatilization from applied urea-$^{15}N$ as affected by treatments was very similar to that of total ammonia volatilization. Our results suggest that elevated $CO_2$ has the potential to decrease ammonia volatilization from paddy soils applied with urea, but the effect could partially be offset when air temperature rises concomitantly.

• 한국대기환경학회지
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• 제13권5호
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• pp.371-381
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• 1997

Precipitation sampls were collected in Chonju-city during October 1994 to September 1995 and were analysed for major ions (N $a^{+}$, $K^{+}$, $Ca^{2+}$, $Mg^{2+}$, C $l^{[-10]}$ , NO/$_3$, S $O_4$$^{2-}$) and trace metals (Al, Cd, Ni, Pb, Sr, Zn) in addition to pH, in order to understand the chemical characteristics of acid rain and to estimate the origin of the determined ions. Most rain showed a neutral or alkaline character, and only 35% had a pH lower than 5.6. S $O_4$$^{2-}$ and N $O_3$$^{[-10]}$ are identified as the primary contributors to precipitation acidity in this region. Neutralization of precipitation acidity occurs as a result of the dissolution of alkaline compounds containing $Ca^{2+}$, $Mg^{2+}$ and $K^{+}$. S $O_4$$^{2-}$ and N $O_3$$^{[-10]}$ precipitation concentrations exhibit a seasonal pattern in which higher concentrations are observed during spring months and lower concentrations during summer months. However, the seasonal behavior of $H^{+}$ concentrations differs from this pattern, in that the highest concentrations occur during autumn months, owing to the different influence of neutralization processes. In all rain, S $O_4$$^{2-}$ concentration exceeded NO/$_3$$^{[-10]}$ concentration. The contribution of maritime sources to the total S $O_4$$^{2-}$ concentration was very low or negligible. For rain strongly affacted by yellow sand, $Ca^{2+}$, $Mg^{2+}$ and $K^{+}$ ions show a sharp increase in concentration, reflecting the increased amount of dust and soil suspended in atmosphere. At the same time, S $O_4$$^{2-}$ and N $O_3$$^{[-10]}$ concentrations are at their highest levels while $H^{+}$ values are not comparably elevated, presumably beacause much of the acidity has been neutralized by alkaline substances. The seasonal variance of trace metal concentrations in rainwater is similar to that of major cations. The annual wet flux of acidic pollutants and trace metals wat calculated to be as follows: N $O_3$$^{[-10]}$ ; 2.32 g/$m^2$, S $O_4$$^{2-}$, 5.34 g/$m^2$, Al; 6.30 mg/$m^2$, Cd; 0.62 mg/$m^2$, Ni; 4.08 mg/$m^2$, Pb: 9.76 mg/$m^2$, Sr; 5.94 mg/$m^2$, Zn; 111 mg/$m^2$./$m^2$.