• 한국토양비료학회지
• /
• 제8권2호
• /
• pp.81-87
• /
• 1975

벼에 대(對)한 가리(加里)의 전량추비분석(全量追肥分施) 효과(効果)를 검토(檢討)할 목적(目的)으로 1972년도(年度)에 1/2,000a 폿트시험(試驗)을 실시(實施)하였다. 가리추비분시(加里追肥分施)는 전량(全量)의40, 30, 20, 10%를 각각 이앙후(移秧後)15일(日), 유수형성기(幼穗形成期), 출수기(出穗前)13일(日) 및 출수후(出穗後)7일(日)에 시용(施用)한 것이다. 시험설계(試驗設計)는 무처리토양(無處理土壤)과 규회석(珪灰石) 및 고토석회(苦土石灰)를 시용(施用)한 처리토양(處理土壤)에 대(對)하여 가리(加理)의 전량기비(全量基肥)와 전량추비분시(全量追肥分施)의 효과(効果)를 비교하도록 되었던바 얻어진 결과(結果)는 아래와 같다. 1. 가리(加里)를 기비(基肥)없이 전량추비분시(全量追肥分施)하는 것이 가리(加里)의 비효(肥効)를 크게 높일수 있는 방법(方法)임을 인정할수 있었다. 2. 가리(加里)의 시용(施用)은 무처리토양(無處理土壤)에서는 등열율(登熱率) 또는 천립중(千粒重) 증대(增大)에 유효(有効)하였고 규회석(珪灰石)과 고토석회(苦土石灰)를 시용(施用)한 처리토양(處理土壤)에서는 입수증대(粒數增大)에 크게 유효(有効)하였으나 이러한 가리(加里)의 역할(役割)은 가리(加里)를 전량추비분시(全量追肥分施)했을때 더욱 현저하여 유의성(有意性) 있는 증수(增收)를 얻었다. 3. 벼짚중(中) 가리함량(加里含量)과 다른성분(成分)과는 부(負)의 상관(相關)이 있으며 유수형성기(幼穗形成期)에 가리함량(加里含量)과 부(負)의 상관(相關)이 인정(認定)되는 성분(成分)은 고토(苦土), 인산(燐酸) 및 질소(窒素)이었고 출수기(出穗期)에는 3성분외(成分外)에 고회(石灰)와 규산(珪酸)이었다. 4. 가리(加里)의 전량추비분시구(全量追肥分施區)와 전량기비구(全量基肥區)를 비교할 때에 가리(加里)의 전량추비분시(全量追肥分施)에 의하여 유수형성기(幼穗形成期)에 있어서는 인산(燐酸)과 고토(苦土)의 흡수억제(吸收抑制)가 감소(減少)되나 질소(窒素)의 흡수억제(吸收抑制)는 더욱 증대(增大)되며 출수기(出穗期)에 있어서는 석회(石灰)와 규산(珪酸)의 흡수억제(吸收抑制)가 감소(減少)되는 반면(反面) 고토(苦土)의 흡수(吸收)는 더욱 억제(抑制)되었다.

• 대한지리학회지
• /
• 제31권2호
• /
• pp.255-267
• /
• 1996

한국의 문화-역사지리학계에서는 다양한 학문적 배경을 가진 학자들이 활동을 해 오고 있다. 이 분야는 문화지리학, 역사지리학, 지리학사, 사회.경제사, 문화사, 인류학, 조 경학 등의 여러 가지 학문분야를 망라하는 학제적 성격을 띠고 있다. 한국에서 이 분야에 관련된 논문이 주요 학술지에 처음으로 출현한 것은 1960년대 초이며, 1970년대에는 이 분 야에 대한 정체성이 확립되기 시작하였다. 1980년대는 한국의 문화-역사지리학이 양적으로 나 질적으로 일대 비약을 가져온 시기이며 이러한 경향은 1990년대로 이어지고 있는 것으로 보인다. 이러한 추세가 앞으로 상당 기간 지속된다면 한국의 문화-역사지리학은 더욱 전문 화되어 완전히 하나의 독립된 학문분야로 자리매김할 수 있을 것으로 전망된다.

• 한국축산식품학회지
• /
• 제38권4호
• /
• pp.711-717
• /
• 2018

Myogenic factor 5 (MYF5) plays an important role in regulating skeletal muscle fiber characteristics, consequently affecting meat production and quality. We identified a novel p.A41P mutation in exon1 of the porcine MYF5 gene by direct sequencing. The mutation was predicted to be destabilizing in protein structure based on the resultant amino acid substitution. We estimated the significant substitution effect of p.A41P on the energy stabilization of Myf5 protein structure. Then, we demonstrated that the mutation in Yorkshire population significantly affected muscle fiber type I composition (p<0.05), loin-eye area of lean meat content (p<0.05) and filter-fluid uptake of meat quality (p<0.01). Furthermore, dominant effects significantly influenced total muscle fiber number (p<0.05). This study suggests that the novel p.A41P mutation in porcine MYF5 may be a valuable genetic marker to affect the muscle fiber characteristics and consequently improve meat production quality and quantity.

• 한국건축시공학회지
• /
• 제9권5호
• /
• pp.103-110
• /
• 2009

건설사업계약은 매우 다양한 계약으로 구성되어 있다. 그리고 이는 일의 완성을 필요로 하는 도급계약의 일종이다. 따라서 당사자들은 계약의 이행과정중에 항상 많은 분쟁에 봉착하게 된다. 실제로 발주자의 지시에 의한 설계변경으로 인해 많은 분쟁이 발생하고 있다. 이러한 분쟁을 해결하기 위해서는 계약의 해석이 수반되어야 하지만, 우리나라에서는 종국적으로 분쟁을 해결하게 하는 분쟁해결절차가 중재와 소송에 국한되어 있으므로 계약당사자들이 비효율성으로 인해 이를 꺼리게 되는 실정이다. 따라서 우리나라에서는 계약의 해석을 찾아보기는 쉽지 않은 반면, 미국의 경우 발주자별로 분쟁해결절차를 둠으로써 다양한 계약의 해석유형을 찾아볼 수 있다. 따라서 본 연구에서는 과업의 범위를 초과하는 변경, 수량의 변경, 이행기간의 변경, 이행방법과 태도의 변경, 정부제공물품이나 인도장소의 변경, 시공자의 변경절차 수용, 감액조정에 대한 사항에 대한 해석동향을 분석하여 제시하였다.

• 한국해양공학회지
• /
• 제32권2호
• /
• pp.95-105
• /
• 2018

An FLNG (floating liquefied natural gas) or LNG FPSO (floating production, storage and offloading) unit is a notable offshore unit with the increasing demand for LNG. The liquefaction process on an FLNG unit is the most important process because it determines the economic feasibility, but would be a hazard source because of the large quantity of hydrocarbons. While a high efficiency process such as C3MR has been preferred for onshore liquefaction processes, a relatively simple process such as the SMR (single mixed refrigerant) or DMR (dual mixed refrigerant) liquefaction process has been selected for offshore units because they require a more compact size, lighter weight, and higher safety due to their space limitation for facilities and long distance from shore. It is known that an SMR has the advantages of a simple configuration, small footprint, and lower risk. However, with an increased production rate, the inherent safety of SMR needs to be evaluated because of its small train capacity. In this study, the potential explosion risks of the SMR and DMR liquefaction processes were evaluated at the conceptual design stage. The results showed that an SMR has a lower overpressure than a DMR at the same frequency, only with a small production capacity of 0.9 MTPA. With increased capacity, the overpressure of the SMR was higher than that of the DMR. The increased number of trains increased the frequency in spite of the small amount of equipment per train. This showed that the inherent risk of an SMR is not always lower than that of a DMR, and an additional risk management strategy is recommended when an SMR is selected as the concept for an FLNG liquefaction process compared to the DMR liquefaction process.

• BMB Reports
• /
• 제34권3호
• /
• pp.194-200
• /
• 2001

Secreted arginase from Evernia prunastri thallus has been purified 616-fold from the incubation medium. Purified arginase was resolved as only one peak in a capillary electrophoresis with a pI value of 5.35. The protein contained high amounts of acidic amino acids, such as Asx and Glx, and a relatively high quantity of Ser and Gly. The molecular mass of native, purified arginase was estimated as about 26 kDa by SE-HPLC. Substrate saturated kinetic showed a typical Michaelis-Menten relationship with a K_m value of 3.3 mM L-arginine. Atranorin behaved as a mixed activator of the enzyme (apparent $K_m$ = 0.96 mM); whereas evernic and usnic acid were revealed as non competitive inhibitors (apparent $K_m$ values were 3.16 mM and 3.05 mM, respectively). Kinetics of atranorin binding indicated that saturation was reached from 0.18 ${\mu}mol$ of the total atranorin and the occurrence of multiple sites for the ligand. This agrees with a possible aggregation of several enzyme subunits during the interaction process. A value of binding sites of about 12 was obtained. The binding of evernic acid was saturated from 23 nmol of total phenol. The number of binding sites was about 5. The loss of the binding ability of evernic acid could be interpreted as a single negative cooperatively. Usnic acid behaves in a similar way to evernic acid, although the binding saturation occurs at $0.14\;{\mu}moles$ of the ligand. This binding appears to be unspecific, and has 28 usnic acid binding sites to the protein.

• 대한지역사회영양학회지
• /
• 제16권5호
• /
• pp.559-568
• /
• 2011

The purpose of this study was to investigate the intakes and perceptions of convenient breakfast related to age and family type. The survey included 545 men and women living in Seoul from June to July. Questionnaire items covered their age, gender, family types, breakfast intakes and preference for convenient breakfast menu. As a result, there were significant differences in the number of breakfast intakes per week according to family types; large families recorded the highest frequency in "I have breakfast everyday" and the couple-only families and nuclear families scored relatively high numbers. In terms of the type of breakfast, the first choice was "rice and side dishes" across all the age groups (69.3%). There were differences in the preference of convenient breakfast in "bread", "cereal", "rice cake", "sunsik", and "rice gruel" by different age. The teens exhibited the highest preference of bread (5.63), and cereal (5.53) for breakfast; those who were in their fifties for rice cake (5.42). Both forties and fifties showed the higher preference of sunsik (4.58, 4.76) and rice gruel (5.89, 5.77) than other age groups. As for the preference for convenient breakfast according to family types, single person families displayed the highest preference of bread (5.42) and cereal (5.75). Couple families showed higher preference of rice gruel (5.82) than other family groups. The preference level for "rice cake" was similar among all the family types. As a result, it is suggested that the development of various breakfast menus considering age groups and family types is needed so that modern people can enjoy breakfast in terms of quality and quantity in their busy daily life.

• 대한조선학회 특별논문집
• /
• 대한조선학회 2013년도 특별논문집
• /
• pp.1-7
• /
• 2013

In past decades, a maximum standard vessel size for chemical tankers is not normally larger than 55,000 TDW due to the characteristic of chemical product shipment which is so variable but small quantity unlike single product carries such as crude oil tankers. These days, as demand of very large chemical tanker is rising due to the change of market trend of chemical product shipment, 75,000 TDW class chemical tanker has been developed. The newly developed vessel's structure has been designed based on CSR (Common Structural Rule) for double hull oil tankers (hereafter CSR) published by IACS (International Association of Classification Societies). However, due to the large difference from typical oil tankers, many items should be specially considered such as on deck transverse and corrugated bulkheads. In addition, two longitudinal bulkheads without upper stool have been constructed in order to maximise the number of cargo tanks and the volume of each cargo tanks. In this study, key word of the vessel has been briefly reviewed and the structural reliability of the proposed vessel has been investigated.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2017년도 9th Asian Crop Science Association conference
• /
• pp.112-112
• /
• 2017

Rice blast caused by Magnaporthe oryzae is one of the most serious diseases that affect the quantity and quality of rice production. The use of resistant rice varieties would be the most effective way to control the rice blast. However R gene incorporation into the rice variety takes time and pathogen could overcome the R gene effects after for a while. For monitoring the rice blast resistance gene distribution in Korean varieties, the four major blast resistance genes against M. oryzae were screened in a number of Korean rice varieties using molecular markers. Of the 120 rice varieties tested, 40 were found to contain the Pi-5 gene, 25 for the Pi-9 gene, 79 for Pi-b and 40 for the Pi-ta gene. None of these rice varieties includes tested 4 R genes. 3 R genes combination, Pi-5/Pi-9/Pi-b, Pi-5, Pi-9.Pi-ta, or Pi-9/Pi-b/Pi-ta were found in 12 varieties, the rice blast disease severity were showed as resistant in the rice verities containing Pi-9/Pi-b/Pi-ta R genes combination, respectively. Also pathogenic diversity of M. oryzae isolates collected in the rice field from 2004 to 2015 in rice field in Korea were analyzed using rice blast monogenic lines, each harboring a single blast resistance gene. Compatibility of blast isolates against rice blast monogenic lines carrying the resistance genes Pi5, Pi9, Pib, and Piz showed dynamic changes by year. It indicates that pathogen has high evolutionary potential adapted host resistances to increase fitness and would lead to rice blast resistance bred into the cultivar becoming ineffective eventually.

• 한국컴퓨터정보학회논문지
• /
• 제28권5호
• /
• pp.49-56
• /
• 2023

현재, 전자상거래는 디지털 트윈에서 메타버스 세상으로 변화되고 있다. 메타버스 세상은 가상 및 현실세계의 중간 형태로 코인 기반의 메타커머스(Meta-commerce)로 운영된다. 이러한, 메타커머스 세상은 아이템(콘텐츠)을 거래할 경우 블록체인 기반의 NFT 코인을 사용한다. 본 연구에서는 기존 단일형태의 NFT 발행이 아닌 대량 NFT 코인(인증)을 발행하는 방법에 관해 연구했다. 연구방법은 대량 NFT 색인 및 자동생성 방법으로 콘텐츠를 레이어(layer) 기반으로 제작하고 원하는 수량만큼 자동생성하도록 설계했다. 본 연구에서는 대량 민팅(minting)을 위해 NodeJS 기반의 프로그램으로 레이어 중첩 방법(배경, 본체, 기타)을 사용했다. 이렇게 만들어진 NFT 콘텐츠는 그룹 증명의 가치로 모임 및 그룹의 증명할 수 있는 블록체인 기반의 증명서로 활용할 수 있다. 또한, 제작된 콘텐츠 NFT 색인하고 NFT 마켓플레이스(Martplace) 사이트에 폴리곤 코인으로 NFT를 발행했다.