• 한국잠사곤충학회지
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• 제53권2호
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• pp.82-86
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• 2015

오디 생산용 뽕나무 품종별 뽕잎 생산량과 누에 발육특성을 조사하고, 적정 누에 사육량 및 생산량을 분석한 결과는 다음과 같다. 1. 오디 뽕나무 품종별 생육특성은 누에 사육 품종인 청일과 비교하여 과상 2호와 수향에서 가지 및 새순과 잎의 생육이 우수하였고, 대심은 새순 수는 많지만, 가지 수가 적고, 새순길이가 짧았으며, 엽장과 엽폭은 청일과 비슷하였다. 2. 오디 수확 후 품종별 뽕잎 생산량은 청일에 비하여 뽕잎 수는 적었지만, 과상 2호와 수향은 뽕잎이 커서 청일보다 뽕잎무게는 훨씬 많았다. 대심은 뽕잎수도 적고, 뽕잎무게도 가장 적었으며, 식재주수로 환산한 10a당 뽕잎무게는 청일에서 1,095 kg/10a로 가장 많았고, 과상 2호 521 kg/10a, 수향 189 kg/10a, 대심 73 kg/10a이었다. 3. 오디 뽕나무 품종별 뽕잎 무기성분은 누에사육용 품종인 청일보다 오디생산용 품종에서 질소함량과 인, 칼륨, 칼슘의 성분함량이 높았다. 4. 오디 뽕나무 품종별로 누에 섭식량은 과상 2호와 수향에서 청일보다는 약간 많았고, 섭식비율은 수향이 66.2%로 약간 높았으며, 유충발육기간은 21일 정도로 차이가 없었지만, 5령 3일 유충무게는 청일 1.9g/마리에 비해 과상 2호 2.07 g/마리, 수향 2.11g/마리, 대심 2.03g/마리로 오디 생산용 뽕나무에서 무거웠다. 5. 품종별 누에 사육기간 동안 감잠비율은 4품종 모두 3령부터 5령까지 영기가 클수록 유충사망률이 높았고, 품종별로는 과상 2호가 14.6%, 수향 13.3%, 대심 13.9%, 청일 12.6%였다. 감잠비율을 고려한 5령 3일 유충의 생산량은 누에 한 상자당 과상 2호 35.4 kg, 수향 36.6 kg, 대심 35.0 kg, 청일 33.6 kg이였다. 6. 뽕잎 생산량에 따른 누에 사육 가능량은 10a당 과상 2호 3.4상자, 수향 1.3상자, 대심 0.5상자, 청일 8.7상자일 것으로 추정되었다.

• 한국환경농학회지
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• 제36권4호
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• pp.249-255
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• 2017

BACKGROUND: Globally, mulberry (Morus sp.) is exploited for feeding leaf to silkworms in order to obtain silk fiber or for animal feedstock production. Also, mulberry fruit is known to a by-product that was produced from mulberry tree after harvesting leaves for silkworm rearing, as a yield and consumption of mulberry fruit was increased, it has been fixing to a newincome crop. Mulberry leaves and fruits are used for the health benefits of human beings. Mulberry contains various bioactive components, such as alkaloids and flavonoids. Mulberry flavonoids are an important part of the diet because of their effects on human nutrition. The flavonoids in mulberry leaf and fruit of 'Suhyang'(Morus alba L.) were determined. METHODS AND RESULTS: Flavonoids for mulberry leaf and fruit of 'Suhyang' were analysed using ultrahigh performance liquid chromatography coupled with diode array detection and quadrupole time-of-flight mass spectrometry (UPLC-DAD-QTOF/MS)technique. An UPLC-DAD-QTOF/MS system was used, and identification of mulberry leaves constituents was carried out on the basis of the complementary information obtained from LC spectra, MS ions, and MS/MS fragments. The mulberry leaf (16 flavonoids) and fruit (9 flavonoids) were isolated and analyzed from Suhyang using UPLC-DAD-QTOF/MS chromatogram. To the best of our knowledge, Quercetin 3-O-(6"-O-malonyl) glucoside and quercetin 3-O-rutinoside (rutin) was detected on the highest content in leaf and fruit, respectively and further research will be devoted to evaluate their biological activity. CONCLUSION: Obtaining information about the concentration of functional materials in mulberry leaves could contribute to the development and promotion of processed, functional products and offer possible industrial use of 'Suhyang', holding promises to enhance the overall profitability of sericulture.

• 한국잠사곤충학회지
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• 제52권1호
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• pp.64-72
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• 2014

주로 누에사육을 위한 사료 생산용으로 이용되던 뽕나무의 용도가 다양화 되면서, 부산물로 이용되어 온 오디가 새로운 소득작목으로 정착되어 가고 있다. 이에 따라 오디 생산에 적합한 뽕 품종에 대한 수요가 늘어나고 있어, 새로운 조숙계 오디용 뽕품종으로 '수향'을 육성하였으며 이 품종의 육성 경위와 특성은 아래와 같다. 1. '07~'12년까지 수원, 공주, 완주 및 진주 4개 지역에서 '청일'을 대조품종으로 하여 지역적응시험을 거쳤으며, 직무 육성신품종 심의회에서 아래와 같이 오디 생산용으로 우수한 품종임이 인정되어 품종으로 보호 출원하였다. 2. '수향'은 국립농업과학원 잠사양봉소재과 뽕나무 유전자원 포장(수원 소재)에 보존되어 있는 계통 중 오디의 특성이 우수한 '조생홍피상'을 모본으로 하고, '개량뽕'을 부본으로 하여 교배한 계통이다. 3. '수향'은 백상형(Morus alba L.)에 속하는 암나무이며, 발아개엽기는 '청일뽕'과 비슷한 직립성의 중생종이다. 4. '수향'의 잎모양은 타원형으로, 오디 수확시기에 조사한 '수향' 품종의 잎의 기부부분부터 잎의 정단부까지 측정한 잎의 길이는 26.7 cm, 잎의 가장 넓은 부위의 길이를 측정한 옆폭은 19.8 cm로 청일뽕보다 상대적으로 큰 편이다. 5. 오디는 식재 후 3년차부터 결실하기 시작하였으며, 식재 후 3년차('09, 결실 1년차)에는 대조품종인 '청일'과 같은 수준을 나타내었다. 식재 후 4년차('10, 결실 2년차)에는 19%, 5년차('11, 결실 3년차) 14%, 6년차('12, 결실 4년차) 11% 높아, 시험기간 결실 4년간의 평균수량은 '청일' 보다 12% 증수되는 결실성이 우수한 품종이다. 오디 숙기는 '청일' 보다 초숙기 기준 7일정도 빨리 수확되는 조숙계이다. 6. 오디 한 개의 무게인 단과중은 2.5 g으로 '청일' 품종 2.0 g에 비하여 무거운 중과형이며, 육안 관찰에 의한 완숙된 오디의 색상은 검은색으로, 오디의 당도는 '청일'보다 높다.

• 말소리와 음성과학
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• 제4권4호
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• pp.129-138
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• 2012

Reading fluency is an important variable in reading comprehension. However, a limited number of studies on reading fluency are available in Korea. The purpose of this study is to review the articles about reading fluency during last 10 years and to present a direction for future research. Forty research papers from the Journal of Learning Disabilities and Language Speech and Hearing Services in Schools were selected from 2002 to 2012. These papers were analyzed in terms of their subjects and research methods. About 64% of the articles focused on typically developing children and children with dyslexia. About 67% of the research consisted of descriptive studies. Based on these results, suggestions were made for future research on reading fluency.

• 말소리와 음성과학
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• 제9권4호
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• pp.115-122
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• 2017

This study attempts to determine the extent to which late talkers are at the risk of delayed phonological development, in order to identify groups at risk and to find factors affecting delayed phonological development. A group of 1,452 children (51% boys, 49% girls) were recruited from the nationwide Panel Study on Korean Children. The current study collected data from 418 children who were previously identified as late-talkers (LT) at their age of three on average (Time 1: expressive vocabulary test) and three years later (Time 2: phonological test). Their phonological outcomes of the Time 2 were analyzed and then compared to those of a group of 1,056 children with typical language development (NLT: no late-talkers) at the age of three in terms of the number of incorrect consonants, and the speech sound disorders rating scores. LT showed a lower articulation score than NLT, and boys showed a lower score than girls. These findings indicate that the late onset of speech and the gender of young children could be potential risk factors of speech sound disorders.

• Asian Journal of Atmospheric Environment
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• 제8권4호
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• pp.202-211
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• 2014

In this study, long-term rainfall data with irregular spatial distribution in Seoul, Korea, were separated into individual precipitation events by the inter-event time definition of 6 hours. Precipitation washout of $PM_{10}$ and $NO_2$ concentrations in the air considering various complex factors were analyzed quantitatively. Concentrations of $PM_{10}$ and $NO_2$ in the atmosphere were lower under condition of rainfall compared to that of non-precipitation, and a noticeable difference in average $PM_{10}$ concentrations was observed. The reduction of concentrations of $PM_{10}$ and $NO_2$ by rainfall monitored at road-side air monitoring sites was also lower than that of urban air monitoring sites due to continuous pollutant emissions by transportation sources. Meanwhile, a relatively smaller reduction of average $PM_{10}$ concentration in the atmosphere was observed under conditions of light rainfall below 1 mm, presumably because the impact of pollutant emission was higher than that of precipitation scavenging effect, whereas an obvious reduction of pollutants was shown under conditions of rainfall greater than 1 mm. A log-shaped regression equation was most suitable for the expression of pollutant reduction by precipitation amount. In urban areas, a lower correlation between precipitation and reduction of $NO_2$ concentration was also observed due to the mobile emission effect.

• 대한지역사회영양학회지
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• 제20권4호
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• pp.259-272
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• 2015

Objectives: A higher consumption of vegetables is emphasized as the core component of most dietary guidelines. Thus, this research investigated the dietary habits and influencing factors of vegetable preferences of adolescents. Methods: This study was conducted by using a self-administered questionnaire. 400 students from two high schools in Gyeongnam (193 boys, 207 girls) participated in the survey. The questionnaire consisted of the following variables: dietary habit, dietary action guide and factors based on Social Cognitive Theory (SCT). Results: The dietary habits of subjects showed significant differences depending on whether they prefer vegetables or not. The subjects in the group who liked vegetables had better dietary habits than the other group. Also, the study determined that the most important reason for liking or disliking vegetables is due to the taste. In the practice of dietary guidelines, the group of subjects who liked vegetables followed dietary guidelines more closely than the other group (p < 0.001). When the factors based on SCT were analyzed, personal factors showed significant differences between the groups: outcome expectation (p < 0.001), self-efficacy (p < 0.001) and affective attitude (p < 0.001). Personal factors and rated vegetable preferences showed a significant correlation in multiple regression analysis (F=42.015, p < 0.001). Conclusions: These results showed that vegetable preference is associated with a key point of desirable dietary habits among subjects. In order to increase vegetable preference or consumption, it is important to focus on strengthening not only self-efficacy of students, but also affective attitude of vegetable.

• Asian Journal of Atmospheric Environment
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• 제7권1호
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• pp.38-47
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• 2013

$PM_{10}$ concentrations were measured at four monitoring sites at the Daechaung station of the Seoul subway. The four locations included two tunnels, a platform, and a waiting room. The outside site of the subway was also monitored for comparison purposes. In addition, the effect of the platform screen doors (PSDs) recently installed to isolate the $PM_{10}$ in a platform from a tunnel were evaluated, and a comparison between $PM_{10}$ levels during rush and non-rush hours was performed. It was observed that $PM_{10}$ levels in the tunnels were generally higher than those in the other locations. This might be associated with the generation of $PM_{10}$ within the tunnel due to the train braking and wear of the subway lines with the motion of the trains, which promotes the mixing and suspension of particulate matter. During this tunnel study, it was observed that the particle size of $PM_{10}$ ranged from 1.8 to 5.6 ${\mu}m$. It was revealed that the $PM_{10}$ levels in the tunnels were significantly increased by the PSDs, while those in the platform and waiting room decreased. As a result, in order to estimate the effect of ventilation system on $PM_{10}$ levels in the tunnels, fans with inverters were operated. It was found that the concentration of $PM_{10}$ was below 150 ${\mu}g/m^3$ when the air flow rate into a tunnel was approximately 210,000-216,000 CMH.

• 환경영향평가
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• 제31권5호
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• pp.271-285
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• 2022

본 연구에서는 AERMOD 기상 전처리 프로그램인 AERMET에 대표적 지표기상 형식인 CD-144와 ISHD를 적용하여 처리 결과를 비교하고, 환경부 토지피복도를 고려하여 대기확산 정도를 분석하였다. 연구결과, knot 단위를 사용하는 CD-144 형식의 경우 단위 변환 오차로 인해 실제 풍속을 고려하지 못하였으나 ISHD 형식은 그대로 반영하는 것으로 나타났다. 점오염원 1시간 최대 농도값은 ISHD가 CD-144에 비해 높았으며, 그 외에는 동일하거나 낮아지는 것으로 나타났다. 환경부 토지피복도를 반영한 농도값은 토지피복도를 고려하지 않은 경우보다 최대 387% 증가하였으며, 등농도곡선 형태(곡선의 방향 및 길이)에도 차이가 있는 것으로 나타났다. 환경영향평가 및 통합환경허가에서의 모델 사용은 동일한 조건에서의 통일된 판단을 요구하므로 AERMET 사용시 ISHD 형식의 사용과 함께 모델링 지역의 토지피복을 고려할 필요가 있다.

• 한국콘텐츠학회논문지
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• 제22권3호
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• pp.134-140
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• 2022

본 연구의 목적은 초등학교 국어교과서의 지시문과 지시문에 포함된 의문사를 조사하는 것이다. 초등학교 2, 4, 6학년 1학기 국어교과서를 분석하였다. 분석을 위해 Microsoft Office Excel에 모든 지시문을 입력한 후 의문사가 포함된 지시문을 구분하였다. 지시문 분석에는 (주)낱말의 분석프로그램을 사용하였고, 의문사와 질문 유형 분석을 위해서는 선행 연구의 기준을 참고하였다. 연구 결과 2, 4, 6학년 국어교과서의 지시문에는 명사, 동사가 많이 포함되었고, 평균 6.9 어절의 문장으로 구성되었다. 지시문에 포함된 의문사 유형으로는 11가지 유형의 의문사가 분석되었다. 모든 학년에서 '무엇, 어떤, 어떻게' 의문사가 가장 많이 나타났다. 질문 유형은 모든 학년에서 사실적 질문보다 추론적 질문이 많았다. 본 연구는 문어가 중심이 되는 학령기 아동의 언어 중재 특히 의문사 중재 목표와 관련한 기초자료를 제공하였다는 점에서 의의가 있다.