• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.81-81
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• 2018

하도식생은 하도변화에 중요한 역할을 하다. 하도 식생의 밀도가 증가하면, 하안의 안정성이 증가하고 하안침식이 감소하며, 사주의 형상과 거동에 영향을 준다. 사주의 발달과 이동은 하안침식에 영향을 주며, 하안침식은 하도식생에 의하여 영향을 받게 된다. 따라서 본 연구에서는 하안의 안정성이 교호사주의 발달과정을 실내실험을 통하여 분석하였다. 하안의 안정성은 홍수터의 하도식생의 밀도에 영향을 받게 된다. 하안의 안정성을 변화시키기 위하여 실제 식생인 알팔파읠 밀도를 조절하여 성장시켰다. 초기에 하안침식이 발생하고, 하폭이 증가하였다. 시간이 증가하면서 상류에서 교호사주 발생하고, 하류로 이동하면서 선택적으로 하안이 침식하였다. 시간이 증가함에 따라, 하폭은 증가하고 사주의 이동속도는 감소하며 사주의 파장도 증가하였다. 홍수터에서 식생의 밀도가 증가함에 따라, 하폭의 증가율은 감소하고, 하도의 안정성은 증가하였다. 식생밀도가 증가함에 따라, 사주의 이동속도는 증가하고 사주의 파장은 감소하였다.

• Annual Conference of KIPS
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• 2012.04a
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• pp.1043-1045
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• 2012

최근 스마트폰 및 태블릿PC 등의 단말기 보급과 이동통신 전송기술이 발달하면서 시간과 장소에 구애받지 않는 모바일 쇼핑 시장이 확대되고 있으며, 모바일 커머스가 함께 발달하여 모바일 쇼핑 시장의 성장을 더욱 촉진시키며 블루오션으로 떠오르고 있다. 반면, 많은 상품을 동시에 비교한 후 구입하는 인터넷 구입패턴을 고려하면 많은 이미지를 빠르게 로딩할 수 있는 방안과 결재상식의 간소화 등의 제한요소와 일부 대형쇼핑몰에 치우친 모바일 쇼핑시장 현황은 앞으로 개선해야 할 것이다.

• Journal of Korean Society of Forest Science
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• v.40 no.1
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• pp.70-74
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• 1978

The aims of this study was to elucidate the correlation between cotyledon numbers and seedling growth and some other traits of Pinus koraiensis. The results are summurized as follows; 1. A highly significant correlations between numbers of coty ledons and juvenile needles was found but no significances between cotyledon numbers and juvenile needle length, width and stomata row numbers. 2. The accessory resin canals did not begin to appear before June but began to appear only small numbers of seedling after July. It was observed that the number of accessory resin canals of juvenile leaves at various growing stages were not related with the number of cotyledons. 3. In the case of adult leaves, there was a significant difference in the number of leaves and the number of cotyledons, but no significant difference between the number of cotyledons and needle length, needle width and stomata row. 4. There were significant differences in the number of cotyledons and top height growth, and root caliper growth among individuals and due to ages. 5. Seedlings with more than 12 cotyledons showed better growth than those with 9 to 11 cotyledons.

• Journal of Life Science
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• v.34 no.4
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• pp.279-285
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• 2024

The zonula occludens (ZO) protein serves as a scaffolding protein, providing structural support at the junctions between cells and the cytoplasmic surface. It acts as a bridge between integral membrane proteins and the cytoskeleton. Besides its structural role, it also participates in regulating cell growth and proliferation. Recent studies have highlighted the involvement of ZO protein in various diseases, including cancer. Specifically, research has indicated that ZO protein influences the cancer microenvironment surrounding cancer cells, thereby facilitating their growth and development. ZO proteins exert diverse functions in the cancer microenvironment, impacting processes such as angiogenesis, inflammatory responses, the epithelial-mesenchymal transition, and interactions with mesenchymal stem cells. The specific mechanisms vary depending on the type of cancer and environmental conditions. Recent research unveiled several signaling pathways involving ZO protein, which could potentially impede cancer progression in the tumor microenvironment. Consequently, these insights open avenues for novel treatment strategies. While the numerous physiological, structural, and morphological roles of ZO protein have been observed at the cellular and in vivo levels, understanding the signaling mechanisms it operates in vivo and how these mechanisms influence the cancer microenvironment remains a challenge. In this review, we delineate the characteristics and regulatory mechanisms of ZO protein in the context of the cancer microenvironment. Additionally, we propose leveraging the properties of ZO protein to devise defense mechanisms within the cancer cell environment and provide an overview of its in vivo role.

• Journal of Bio-Environment Control
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• v.33 no.3
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• pp.172-177
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• 2024

Many studies have reported that mealworms can ingest plastic during their larval stage. The purpose of this study was to investigate the effects of expanded polystyrene consumption on the growth and development of mealworms during their larval stage. We found that the growth rate is significantly different between mealworms consumed wheat bran and mealworms consumed expanded polystyrene (p < 0.001). The transformation into pupa occurred faster among the mealworms consumed expanded polystyrene than those consumed wheat bran (p < 0.001). However, the survival rate was not significantly different between the two groups of mealworms (p = 0.786). Based on the data, we conclude that mealworms consuming expanded polystyrene have a slower weight gain and a shorter development period than mealworms consuming wheat bran, but the expanded polystyrene does not affect the survival rate before the transformation into pupa. Practically, we anticipate that mealworms can be a resource for the sustainable and eco-friendly removal of expanded polystyrene waste.

• Korean Journal of Poultry Science
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• v.48 no.1
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• pp.31-39
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• 2021

We aimed to investigate the age-dependent development of digestive organs, intestinal enzymes, and hepatic antioxidant defense system in White Leghorn chicks aged 0, 3, 7, 14, and 21 days. Body weight (BW) did not significantly change between days 0 and 7 but significantly increased (P<0.05) after day 7. The relative liver weight (g/100 g of BW) was significantly lower at day 0 than at the other ages but markedly increased at days 3 and 7 (P<0.05). The relative pancreatic weight changed similar to the change in liver weight, with the maximum development at 7 days (P<0.05). The relative intestinal and mucosal tissue weights increased rapidly after hatching (P<0.05), with the maximum growth at 7 days. Furthermore, maltase and sucrase activities were significantly higher at day 3 than at day 0 (P<0.05). Leucine aminopeptidase activity was high at day 0 and remained constant as age increased. Superoxide dismutase and glutathione S-transferase activities in the liver were the lowest at day 0 but significantly increased after 7 days (P<0.05). Glutathione peroxidase activity increased significantly after day 14 compared with that at days 0 and 7 (P<0.05). Lipid peroxidation was not affected by age. In conclusion, the digestive organ weights and hydrolase activity of chicks increased rapidly during the first 3 or 7 days post-hatching. Hepatic antioxidant enzyme activity increased simultaneously with the increase in digestive organ weights, after 7 days.

• Child Health Nursing Research
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• v.19 no.3
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• pp.159-167
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• 2013

Purpose: The purpose of this study is to find out preschool children's health status and their mothers' health management in the vulnerable classes. Methods: The assessment tool was developed, taken into consideration existing studies, materials produced by the customized visiting health care system, and review of visiting nurses of health centers and related experts. Data were collected January to February 2010 from 259 mothers by visiting nurses, and analyzed using SAS program for descriptive statistics. Results: Body weight less than 3 percentile was found for 5.0% children and over 97 percentile for 7.7%. Atopy was found in 17.8% children, no hand-washing after toileting and before meal in 30.9% and 36.7% respectively, no breakfast in 15.8%, and irregular meal in 32.0%. Sex education was made by 45.7% mothers, regular dental check by 56.6%, and hearing and eyesight test by 61.1% and 66.8% respectively. Home environment for upbringing is 34.3 in the scale of 41, and accident prevention 17.5 in the scale of 22. Conclusion: It is necessary to make an intervention on children's weight, personal sanitation and meal time in the vulnerable classes. Mothers need to be educated for appropriate health care, and home environments to improve upbringing and accident prevention.

• Journal of The Korean Society of Inherited Metabolic disease
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• v.15 no.1
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• pp.35-39
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• 2015

Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency is the most common mitochondrial fatty acid oxidation disorder which is inherited as an autosomal recessive pattern. MCAD deficiency is caused by mutations in the ACADM gene; medium-chain acyl-CoA dehydrogenase gene (ACADM; OMIM 607008) on chromosome 1p31 which encodes MCAD, the mitochondrial enzyme which catalyzes the first reaction in beta-oxidation of fatty acids with medium-chain length. Here, we describe one Korean pediatric case of MCAD deficiency, which was diagnosed during newborn screening by tandem mass spectrometry and confirmed by molecular analysis. The level of hexanoyl (C6), octanoyl (C8), decenoyl (C10:1) carnitine, and C8/C2 ratio was elevated. Homogenous c.1189T>A (p.Tyr397Asn) mutation of ACADM gene was identified by direct sequencing. He has been asymptomatic and has shown normal growth and development by 25 months of age without any intervention. There was no episode of metabolic acidosis during follow-up period.

• KSBB Journal
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• v.16 no.6
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• pp.568-572
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• 2001

Light is one of the most important environmental factors controlling plant physiology. The human granulocyte-macrophage colony-stimulating factor (hGM-CSF) was produced from cell suspension cultures of transgenic tobacco under different light conditions (24 hr light, 18 hr light/dark cycle, dark). Under 24 hr light condition, cell growth was best and dry cell weight reached 14.4 g/L. Light did not influenced the secretion of total proteins. However, in the dark condition, the ratio of secreted total protein/dry cell weight was 1.5 fold higher than those of ethel conditions. Production of hGM-CSF was highest with 18 hr light condition and reached 496.5 ug/L. In addition, the content of hGM-CSf in secreted total proteins was 1.8 fold higher than that of 24 hr light condition, which is beneficial for the purificationof the protein.

• Korean Journal of Child Studies
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• v.36 no.3
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• pp.77-92
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• 2015

The purpose of this study was to employ the Latent Growth Curve Model to investigate the developmental trajectories of maternal depressive symptoms and to identify predictors that might have an effect on change and the level of developmental trajectories. The results of this study indicated that the maternal depressive levels of a high risk group had increased significantly over the past 5 years. The predictors for these developmental trajectories of maternal depressive symptoms were as follows; birth order, maternal prenatal depressive levels, self-esteem, marital satisfaction, parenting stress and the level of family crisis experienced by the high risk group.