• 한국수자원학회논문집
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• 제37권5호
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• pp.397-406
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• 2004

어떤 특정 지역의 지하수 개발량을 적적히 파악하기 위해서는 지하수함양량의 산정이 필요하다. 경상북도에 위치한 위천 유역내의 소유역에 대하여 지하수 함양량을 산정하였다. 기저유출분리법과 SCS-CN방법을 이용하여 갈수년과 풍수년이 존재하는 1992년∼1997년간의 년 평균 지하수 함양량을 추정하였다. 기저유출분리법을 이용하여 추정한 결과, 연평균 지하수 함양률이 11.9%∼18.7%로 변화하였으며 계산기간 중의 년 평균 강수에 의한 지하수 함양량은 141.6mm로 지하수함양률은 14.5%이었다. SCS-CN방법을 이용하여 추정한 결과, 연평균 지하수 함양균이 7.9%∼20.9%로 변화하였으며 계산기간 중의 년 평균 강수에 의한 피하수 함양량은 147.4mm 로 지하수 함양률은 15.1%이었다. 두 방법으로 산정한 갈수년과 풍수년이 존재하는 장기간 동안의 년 평균 강수에 의한 지하수 함양량은 지하수 개발에 유용하게 사용할 수 있음을 나타낸다.

• 한국잠사곤충학회지
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• 제27권1호
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• pp.18-23
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• 1985

인공사료육 누에에 있어서 사료조성 차이와 사육환경이 누에의 성장발육에 미치는 영향은 다음과 같다. 1. 사료의 대두분말 함량이 많을수록 경과가 짧았으나 대두분말 함량이 50%를 넘으면 오히려 경과가 길어졌다. 2. 감잠비율은 대두분말 함량비가 50%까지는 영향을 미치지 못하지만 그 이상에서는 높았다. 3. 사료조성 차이가 견질에 미치는 영향은 단견중에 있어서는 단백질 함량이 많을수록 무겁고 견층중은 차이가 없었으며 견층비율은 대조구에 비해 각 처리구 모두 낮았다. 4. 사육환경 중 온도는 고온이 광선은 암조건이 경과를 단축시켰다. 5. 감잠비율은 치잠기 고온에서 낮았고 광선은 암조건에서 낮았다. 6. 사육환경이 견질에 미치는 영향은 단견중, 견층중, 견층비율 모두 온도는 고온이, 광선은 암조건이 양호하였다.

• 한국수정란이식학회지
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• 제28권2호
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• pp.149-155
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• 2013

Mullerian inhibiting substance (MIS) is a member of the TGF-${\beta}$ (transforming growth factor-${\beta}$) family whose members play key roles in development, suppression of tumour growth, and feedback control of the pituitary-gonadal hormone axis. MIS is expressed in a highly tissue-specific manner in which it is restricted to male Sertoli cells and female granulose cells. The serum levels of MIS in prenatal and postnatal ICR mice were measured using the enzyme-linked immuno-solvent assay (ELISA) using the MIS/AMH antibody. Mice were grouped by age: the significant periods were at the onset of development. During sex organ differentiation, no remarkable difference between female and male foetus MIS serum levels (both<0.1 ng/ml) was observed. However, MIS serum levels in pregnant mice markedly changed (4.5~12.2 ng/ml). After birth, postnatal female and male mice serum MIS levels changed considerably (male: <0.1~138.5 ng/ml, female: 5.3~103.4 ng/ml), and the changing phase were diametrically opposed (male: decreasing, female: fluctuating). These findings suggest that MIS may have strong associations with not only develop-ment but also puberty. For further studies, establishing the standard MIS serum levels is of importance. Our study provides the basic information for the study of MIS interactions with reproductive organ disability, cancer, and the effect of other hormone or menopause. We hypothesise that if MIS is regularly injected into middle-age women, meno-pause will be delayed. We detected that serum MIS concentration curves change with age. The changing phase is different between males and females, and this difference is significant after birth. Moreover, MIS mRNA is expressed during the developmental period (prenatal) and also in the postnatal period. This finding indicates that MIS may play a significant role in the developmental stage and in growth after birth.

• 한국의류학회지
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• 제13권4호
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• pp.319-329
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• 1989

The present paper mainly cocerns, in social aspect of the cultural change, with how cholik was introduced and accepted in $Kory\v{o}$ dynasty. It was through cultural transmission in political relations with Won dynasty that $ch\v{o}$ lik was first listed on our own costume system in later $Kory\v{o}$ dynasty. The acceptance by $Kory\v{o}$ society can be interpreted as the twofold effects; positively, it enriched our costume system and, negatively, it brought about various conflicts, which in turn caused some unwelcome reactions. Once it had permeated into $Kory\v{o}$ culture. it could not avoid being changed by social conditions. The changing process can be defined as the dual cycles of fashion. The first one startd at mid peroid of $Kory\v{o}$ when King $Chung-ry\v{o}$l provided a law to wear the $W\v{o}n$ costume and. ended at larter $Kory\v{o}$ of King Kong-min's reign. The second cycle rose in the period between King Sejong's reign and late $Chos\v{o}n$. Each of the two cycles appeared to have its own characteristics; 1. The first cycle. 1) In spite of the long period of a century, the cycle was very abrupt both in development and decline. 2) The abrupt pattern of the cycle can be attributed to the nation-wide law provided by the ruler. 2. The second cycle. 1) Compared with the first cycle, the curve was rather slow. 2) The fashion originated from the hyperimitation of the government officials, since the costume was the royal gift by Chinese Emperor. 3) The main cause of the development of the fastion was the wars, rather than the public preference. 4) The main cause of the decline of the fashion was that it could no more differentiate the social status, that the wearer was laughed at by the Chinese, and that the long period of wearing the same dress stimulated the fashion psychology. 5) The increasing size of the costume rather decreased the very function of the costume.

• 대한한방소아과학회지
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• 제13권2호
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• pp.1-39
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• 1999

A infancy is the period in that growth and development of man are the most fast and neutrial requirement is the most big on his life. The insufficient neutrition of this period can have bad effect uppon man's whole life health not only physically but also pscychogenically and emotionally. Therefore a proper feeding at a proper time is very important to form the good food behavior and emotional development. The rate of using the commercial weaning food in Korea has gradually increased since 1970 and expected to be more increasing in future. In this paper, I investigate the general weaning status, stneutrial component and material content of infant weaning foods marketing in Korea at present. The material for this study have been collected in the exposition of products and data from manufacturing companies and etc. The conclusion is following. 1. The proper weaning period is from $4{\sim}6$ momth to 12 momth, but recently it is inclined to prolong. 2. In weaning methods, using a spoon is superior to using a bottle in food behavior and neutrial status. 3. The commercial weaning foods have two type, the powder type and formula type, but except gober's, all products marketing in Korea are the powder type and a sort of product is very simple. Therefore it is necessary to develp the more various kind of weaning foods, especially the formula type. 4. In the neutrial component, Son-Sik (flour of grain) cannot be up to international standards and the greater parts of weaning foods have too much suger over the standards.

• Biomolecules & Therapeutics
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• 제4권4호
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• pp.297-300
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• 1996

LBD-001, a recombinant human interferon $\gamma$ produced by genetically engineered yeast as a host system, was administered intraperitoneally to Sprague-Dawley male rats from premating to mating period at least for 60 days and to female rats from at least for 2 weeks before mating to early gestation period (from day 0 to 7 of gestation) at dose levels of $0.35\times10^6, 0.39\times10^6, and 1.38\times10^6$ I.U./kg/day. In the positive control group, ethynylestradiol ($EE_2$; 40 $\mu\textrm{g}$/kg/day) was subcutaneously administered only to female rats during the early gestation period. Effects of the test agents on reproductive performances of the male or female rats and embryonic development were as followings; (1) No significant changes by the treatment of LBD-001 were observed in general behaviors, body weight, food and water consumption, and necropsy of parent animals. However, significant decreases of body weight, food consumption, and water consumption were observed in ($EE_2$ -treated female rats. (2) Mating performances and fertility of parent animals were not significantly affected by the treatment of LBD-001. In ($EE_2$ -treated females, however, the fertility was completely inhibited. (3) No changes in resorption rate and external abnormality of F1 fetuses were observed by the treatment of LBD-001. The results show that LBD-001 at the dose of $1.38\times10^6$ I.U./kg/day or less does not affect general toxicity and reproductive function of parent animals and embryonic development of F1 fetuses.

• Journal of Biosystems Engineering
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• 제41권4호
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• pp.373-388
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• 2016

Background: Recent inquiries into high-quality foods have discussed the importance of the functional aspects of foods, in addition to traditional quality indicators such as color, firmness, weight, trimming loss, respiration rate, texture, and soluble solid content. Recently, functional Chinese cabbage, which makes up a large portion of the vegetables consumed in Korea, has been identified as an anticancer treatment. However, the investigation of practical issues, such as the effects of storage conditions on quality indicators (including functional compounds), is still limited. Purpose: We reviewed various studies on variations in the quality indicators and functional compounds of Chinese cabbage in response to different storage environments, focusing on storage temperature and storage period. In particular, we emphasized the effect of storage temperature and storage period on glucosinolate (GSL) levels, in order to provide guidelines for optimizing storage environments to maximize GSLs. Additionally, we used response surface methodology to propose experimental designs for future studies exploring the optimal storage conditions for enhancing GSL contents. Review: Large variations in quality indicators were observed depending on the cultivar, the type of storage, the storage conditions, and the harvest time. In particular, GSL content varied with storage conditions, indicating that either low temperatures or adequate air composition by controlled atmospheric storage may preserve GSL levels, as well as prolonging shelf life. Even though genetic and biochemical approaches are preferred for developing functional Chinese cabbage, it is important to establish a practical method for preserving quality for marketability; a prospective study into optimal storage conditions for preserving functional compounds (which can be applied in farms), is required. This may be achievable with the comprehensive meta-analysis of currently published data introduced in this review, or by conducting newly designed experiments investigating the relationship between storage conditions and the levels of functional compounds.

• 콘크리트학회논문집
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• 제29권2호
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• pp.141-148
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• 2017

본 연구는 PC부재의 공장생산에 있어서 여러 가지 증기양생 조건의 변수에 따른 고강도 콘크리트의 초기 압축강도 발현성상을 실험적으로 검증하고, 최적 양생조건을 확인하기 위한 것이다. 40 MPa 이상의 고강도 콘크리트 제조에는 보통 포틀랜드 시멘트를 사용하였으며, 콘크리트의 배합조건은 물-시멘트비 3종류(W/C 25%, 35% 및 45%)를 대상으로 하였다. 본 연구의 증기양생 변수로 (1) 전치양생 시간 3종류, (2) 최고 양생온도 3종류, (3) 최고온도 유지시간 3종류, (4) 승온 및 강온양생 온도 1종류 등을 대상으로 재령별 압축강도 시험을 실시하였다. 또한, 증기양생 및 표준양생에 따른 재령별 강도발현을 비교하였다. 실험결과, (1) 전치양생은 콘크리트의 초기 응결시간 이상, (2) 최고 양생온도는 $55^{\circ}C$ 이하, (3) 최고온도 유지시간은 6시간 이하로 하는 것이 증기양생 고강도 콘크리트의 강도발현에 적합한 양생조건으로 나타났다. 또한, 재령 28일에서 증기양생과 표준양생의 압축강도 발현성상의 역전현상이 발생하였다. 따라서 이러한 양생조건으로 PC부재의 생산성 및 현장관리를 위한 기초자료로 제시하고자 한다.

• 한국농림기상학회지
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• 제21권4호
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• pp.269-276
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• 2019

본 연구는 지구온난화로 인한 콩 생육기간 중 한발기간에 따른 생육 특성과 수량 구성요소 변화에 대한 연구 결과로서 대조구에 비하여 VS와 FS는 수량에 직접적인 영향을 주었다. 한발은 잎의 노화를 가속하여 LAI, 잎 질소 농도 및 잎 건물중이 감소하였다. 이러한 결과 품종과 한발 기간이 LAI, 잎 질소 농도 및 잎 건물중이 고도로 유의하였다. 최종 수확에서 전체 협수는 대조구에 비하여 VS와 FS가 각각 33.6%와 40.5%가 감소였고, 100립 중은 대조구에 비하여 VS와 FS가 각각 16.1%와 10.1%가 감소하였다. 이러한 결과 종실 수량은 대조구에 비하여 VS와 FS가 각각 39.8%와 45.1%가 감소하였다. 한발 기간에 따라 대원콩과 해원콩이 수량 감소 폭이 큰 반면에 소연콩은 크지 않았다. 본 연구 결과 한발 기간은 VS에 비하여 FS가 좀 더 민감하게 반응을 하였으며, 품종과 한발기간은 고도의 유의성을 보였다. 본 연구에서 주목할 것은 개화기 10일전부터 착협기까지 수분 공급이 제대로 이루어 진다면 주경에서의 협수와 100립 중이 확보가 되어 수량 감소를 방지할 것으로 기대된다.

• 한국작물학회지
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• 제33권3호
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• pp.262-269
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• 1988

벼의 등숙기간중에 발생하는 수발아 피해를 경감시킬 수 있는 방법을 모색하기 위하여 품종간 수발아성 비교, 출수후 종자발달에 따른 발아율 비교, 등숙기의 생장조절제 처리가 수발아에 미치는 영향 등을 조사 및 실험한 결과를 요약하면 다음과 같다. 1. 보통기 보비 재배한 포장에서의 수발아성은 일반형중 조생종들이 높았고 중만생종과 통일형 품종들은 수발아가 되지 않았다. 2. 일반형 품종인 대성벼는 출수후 30일, 통일형인 태백벼는 35일이 경과되면 발아력이 높아져 종자로서의 발아조건은 충분히 갖추어진 것으로 보여진다. 3. 공시한 두 품종 및 3처리시기에서 모두 수발아 억제에는 NAA 및 CMH는 100ppm 그리고 Reglone은 0.4∼0.6%의 농도에서 효과가 가장컸다. 4. 생장조절제가 처리된 종자의 발아율은 공시된 두 품종 모두 NAA와 CMH는 무처리와 차이없이 양호 하였으나 Reglone 이 처리된 종자의 발아율은 낮았다. 5. 생장조절제가 처리된 두 품종의 등숙율은 NAA와 CMH는 무처리와 차이가 없었으나 Reglone처리 구는 낮았고 종자 색갈은 NAA만이 무처리와 비슷하였으며 CMH와 Reglone 은 농도가 높아짐에 따라 다갈색을 띄는 미립이 많았다. 도정특성을 보면 NAA는 무처리와 차이가 없었고 CMH 및 Reglone을 출수후 20∼30일에 처리한 구는 완전현미비율이 낮았다.