• Korean Journal of Food Science and Technology
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• v.34 no.4
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• pp.700-709
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• 2002

To develop a natural food preservatives from medicinal herbs (62 species), antimicrobial test was performed with hot water and ethanol extracts against Escherchia coli, Listeria monocytogens and Candida albicans by paper disk method. And its result as a first screening test, 7 kinds of medicinal herbs were selected, and more precise analysis was conducted at last 3 kinds of medicinal herbs was finally selected. Therminalia chebula Retz and Rhus javanica has a broad antimicrobial spectrums and has a low MIC values. In growth inhibition test, they showed a very strong antimicrobial activity aganist Listeria monocytogens. If there has a elaborate approaches in its characteristics and properties, some good result must followed in making a powerful natural antimicrobial preservatives.

• Journal of Korean Medicine Rehabilitation
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• v.31 no.3
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• pp.115-123
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• 2021

This study reports the effects of Korean medicine treatments including Chuna manual therapy (CMT) and exercise treatment for a patient suffering with cervical spinal stenosis. We treated patient diagnosed with cervical spinal stenosis. The patient was treated with CMT once a day for 26 days. Manual muscle testing (MMT), ratio and degree of numbness, numerical rating scale (NRS) were used as tools for evaluating the patient's progress. MMT was increased from 3+ to 5, ratio and degree of numbness were decreased from grade (Gr.) 9 to Gr. 4, NRS was decreased from 5 to 3. This study suggests that CMT and self-exercise can be considered as effective treatment for cervical spinal stenosis.

• Journal of Korean Society on Water Environment
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• v.35 no.3
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• pp.257-270
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• 2019

Followingthe Four Rivers Project, cyanobacterial blooms have been frequently observed in the upstream of the installed weirs. The aim of this study was to characterize the major environmental factors that are associated with the cyanobacteria dominance in Baekje Weir (Geum River) and Juksan Weir (Youngsan River) based on intensive experiments and systematic data mining methods. The factors related to the cyanobacteria dominance include7-days cumulative rainfall (APRCP7), 7-days averaged flow (Q7day), water temperature (Temp), stratification strength (${\Delta}T$), electronic conductivity (EC), DO, pH, $NO_3-N$, $NH_3-N$, TN, TP, $PO_4-P$, Chl-a, Fe, BOD, COD, TOC, and $SiO_2$. The most highly correlatedfactors to the dominant cyanobacteria were found to be EC, Temp, Q7day, $PO_4-P$ in theBaekje Weir. On the other hand, those dominant in the Juksan Weir were ${\Delta}T$, TOC, Temp, EC and TN. The EC showed a strong correlation with cyanobacteria dominance in both weirs because a high EC represents a persisted low flow condition. The cyanobacteria dominance was as high as 56 % when the EC was equal or greater than $418{\mu}S/cm$ in Baekje Weir. It was as high as 63% when the ${\Delta}T{\geq}2.1^{\circ}C$ in the Juksan Weir. However, nutrients showed a minor correlation with cyanobacteria dominance in both weirs. The results suggest that the cyanobacteria dominate in astate where the water flow rate is low, water temperature is high and thermal stratification is strengthened. Therefore, the improvement of flow regimes is the most important to prevent persistent thermal stratification and formation of cyanobacteria bloom in theBaekje and JuksanWeirs.

• Journal of The Korean Society of Grassland and Forage Science
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• v.42 no.3
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• pp.169-175
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• 2022

This study aimed to examine the changes in dry matter yield and growth characteristics of alfalfa (Medicago sativa L.) in response to variations in sowing dates during the autumn season of 2021-22 in a dry paddy field of Chilbo-myeon, Jeongeup-si, Jeollabuk-do. Treatments comprised four sowing dates at 10-day intervals, i.e., October 8, October 18, October 28, and November 8, 2021. The winter survival rate of alfalfa showed a significant difference between different treatments but was at a satisfactory level for all (p<0.05). The winter survival rate for the fourth sowing date, a month later than the first sowing date, was approximately 11.7% lower than that for the first sowing date. The plant height ranged between 82.3-93.1 cm and 60.5-63.7 cm at the first and second harvest, respectively, smaller at the second harvest than at the first harvest. The total dry matter yield of alfalfa was the highest at 13,316 kg/ha for the first sowing date, and the later the sowing date, the lower the dry matter yield. The protein content of alfalfa ranged between 13.6-17.3% in the first harvest, lower than the standard alfalfa protein content of 20% or more. In relative feed value, the first sowing (Oct. 8) was the most significantly higher in the first harvest (p<0.05). These results suggest that the early and mid-October sowing dates are optimum for sowing alfalfa during autumn and result in improved plant growth, dry matter yield, protein content, and winter survival compared to those at later sowing dates. Therefore, dry paddy fields can be safely employed for alfalfa cultivation with sowing dates in early and mid-October during autumn.

• Korean Journal of Ichthyology
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• v.34 no.4
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• pp.288-293
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• 2022

A single specimen of Neoclinus nudiceps, belongs to the family Chaenopsidae, was first collected from Hongdo Island, Yellow Sea of Korea on June 13, 2012. This species is characterized by a lateral line reaching to below the 3rd~4th spines of the dorsal fin, two pairs of supraorbital cirri arranged in one row, anterior supraorbital cirri with six tips, and posterior supraorbital cirri with one tip. The species is morphologically similar to N. monogrammus, but differs in the length of lateral line (reaching 3rd~4th dorsal spines in N. nudiceps vs. reaching 6th~9th dorsal spines in N. monogrammus, respectively). This study documents the first record of N. nudiceps in Korean waters and suggests the new Korean name "Jjalb-eun-teol-bi-neul-be-do-la-chi" for the species.

• Journal of The Korean Association For Science Education
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• v.39 no.3
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• pp.457-464
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• 2019

This study aims to explore meta-modeling knowledge of gifted students through the modeling. To do this, five gifted students were asked to do modeling related to candle burning, and all the processes of modeling were observed and then individual interviews were conducted. As a result of the study, two students were classified as first level and three students were classified as second level. The students of the first level did not have any model generation or model-based prediction activities, and observation was the most meaningful activity. On the other hand, the students of the second level performed all four modeling processes. However, the generation of the model and the prediction using the model were relatively strong. The data they gained from the experiments was perceived as just confirming the absolute model. No student was found in Level 3 or Level 4. The results of this study show that gifted students remain at the progression level of recognizing the model as an objective reality, and in order to cultivate a true scientist, it is necessary to educate the gifted students to recognize the subjectivity of the model.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.255-261
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• 2019

This trial was conducted to determine the optimal supplementation level of Hermetia illucens (HI) on the growth performance, the apparent total tract retention of nutrients and the economic efficiency in weaning pigs. A total of 192 weaned pigs ($Landrace{\times}Yorkshire{\times}Duroc$; $6.51{\pm}0.15kg$) were randomly allotted to 4 treatments and 6 replicates on the basis of their initial body weight. The dietary treatments included a corn-soybean meal based diet supplemented with 0, 1, 2 or 3% HI. There were no significantly effects between the treatments in phases I, II and overall. But average daily gain was significant and linearly increased when HI was added to the diet in the overall group. Although digestibility of dry matter (DM) was increased by adding HI, digestibility responses were not observed by supplying HI in phase I. Also, all the parameters of economic efficiency were not significantly different according to the level of HI. The results showed that HI had beneficial effects on growth performance and digestibility of dry matter. However, there were no effects on economic efficiency by using HI in weaning pig diets.

• Journal of Chest Surgery
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• v.56 no.4
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• pp.244-251
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• 2023

Background: Extracorporeal membrane oxygenation (ECMO) has been widely used in patients with cardiorespiratory failure. The serum albumin level is an important prognostic marker in critically ill patients. We evaluated the efficacy of using pre-ECMO serum albumin levels to predict 30-day mortality in patients with cardiogenic shock (CS) who underwent venoarterial (VA) ECMO. Methods: We reviewed the medical records of 114 adult patients who underwent VA-ECMO between March 2021 and September 2022. The patients were divided into survivors and non-survivors. Clinical data before and during ECMO were compared. Results: Patients' mean age was 67.8±13.6 years, and 36 (31.6%) were female. The proportion of survival to discharge was 48.6% (n=56). Cox regression analysis showed that the pre-ECMO albumin level independently predicted 30-day mortality (hazard ratio, 0.25; 95% confidence interval [CI], 0.11-0.59; p=0.002). The area under the receiver operating characteristic curve of albumin levels (pre-ECMO) was 0.73 (standard error [SE], 0.05; 95% CI, 0.63-0.81; p<0.001; cut-off value=3.4 g/dL). Kaplan-Meier survival analysis showed that the cumulative 30-day mortality was significantly higher in patients with a pre-ECMO albumin level ≤3.4 g/dL than in those with a level >3.4 g/dL (68.9% vs. 23.8%, p<0.001). As the adjusted amount of albumin infused increased, the possibility of 30-day mortality also increased (coefficient=0.140; SE, 0.037; p<0.001). Conclusion: Hypoalbuminemia during ECMO was associated with higher mortality, even with higher amounts of albumin replacement, in patients with CS who underwent VA-ECMO. Further studies are needed to predict the timing of albumin replacement during ECMO.

• Microbiology and Biotechnology Letters
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• v.42 no.4
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• pp.402-406
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• 2014

Six kinds of newly recorded yeasts such as Rhodosporidium diobovatum SY4-2, Cryptococcus bestiolae SY7-1, Kazachstania unispora SY14-1, Kazachstania servazzii SY14-3, Pichia holstii SY20-2 and Cryptococcus tephrensis SY26-1 were screened from sixty one yeasts derived from wild flowers found in Seonyudo, Gogunsanyeoldo, Jeollabuk-do, Korea. All of them grew in 50% glucose-containing yeast extract-peptone-dextrose (YPD) broth and Pichia holstii SY20-2 was also halophile, growing in 20% NaCl-containing YPD broth. All of them, except Cryptococcus tephrensis SY26-1, were assimilated to glucose. Cell-free extract from Kazachstania servazzii SY14-3 showed the highest 98.6% of ${\alpha}$-glucosidase inhibitory activity and maximal production of the ${\alpha}$-glucosidase inhibitor was obtained with 24h incubation at $30^{\circ}C$. The antihypertensive angiotensin I-converting enzyme inhibitory activity of the unrecorded yeasts were showed 58.6-80.4% in their supernatants.

• The Bulletin of The Korean Astronomical Society
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• v.40 no.2
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• pp.54.3-55
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• 2015

국제전기통신연합 (ITU)에서 주관하여 2015년 11월 2일-27일 스위스 제네바에서 개최되는 WRC-15(세계전파 통신회의, World Radiocommunication Conference)회의에서는 28개 의제에 대해서는 의제별 주파수대역별로 국제전파규칙(Radio Regulations)을 개정하게 된다. WRC-15 본회의에는 200여개 ITU회원국의 국가대표 3,000여명이 모여서 회의를 진행하게 되며, 원활한 회의진행과 의견 결정을 위하여 각 국가별 제안서 제출은 지양하고, 해당 지역별 국가들의 공동제안서를 중심으로 논의하게 된다. ITU에는 현재 6개의 지역(유럽, 러시아, 아랍, 북남미, 아프리카 및 아태지역) 공동체가 등록되어 있으며, 아태지역은 아태지역 전파통신협의체(Asia-Pacipic Telecommunity)를 구성하여 WRC 의제에 대응하고 있다. 지난 2015년 7월 27일-8월 1일에는 WRC의제에 대한 아태지역의 공동제안서(PACP)를 작성하기 위한 최종 회의(APG-15 5차회의)가 서울 힐튼호텔에서 개최되었다. 과학업무 의제의 경우, 5개 의제에 대한 공동제안서가 작성되었으며, 그 결과는 다음과 같다. 1) 7145-7250 MHz 대역의 지구탐사위성(지구대우주)업무의 1순위 분배 지지, 2) 9,200~9,300MHz 및 9,900~10,400MHz대역의 지구탐사위성업무의 신규 SAR용 1순위 분배 지지, 3) 우주선 근거리통신용 410-420MHz 대역 관련 거리제한 규정 삭제 지지, 4) 윤초 삭제 지지, 5) 나노 위성 및 피코 위성의 규정개정 연구를 위한 차기 WRC회의 의제 수행 지지를 들 수 있다. 따라서 본 발표에서는 7월에 개최된 APG-15 5차회의의 주요 결과를 소개하고, WRC-15회의에 대비하여 국내 전파천문업무 보호를 위한 주요 이슈에 대해 소개를 하고자 한다.