The study aimed to enhance quality characteristics of prune juice added with Schisandra chinensis and optimize mixing ratios of its components. Prune juice was prepared using varying proportions of prune concentrate and medicinal herbal plant extracts. Results showed that the pH of the medicinal herbal plant complex extract containing Schisandra chinensis decreased significantly, while the content of soluble solids increased with increasing concentration of prune concentrate. Results of analyzing antioxidant activity of individual component revealed that both prune concentrate and Schisandra chinensis extract demonstrated significantly higher antioxidant activities than other extracts, with Cinnamomum cassia extract showing the lowest antioxidant activity. As a result of antioxidant component analysis, total polyphenol contents, total flavonoid contents, and total tannin contents were all the highest in MSS but the lowest in the control. Regarding antioxidant activity, DPPH radial scavenging activity, ABTS DPPH radial scavenging activity, and SOD-like activity were the highest in MSS but the lowest in the control. In conclusion, findings suggest that incorporating higher proportions of both Schisandra chinensis and prune concentrate can synergistically improve the antioxidant activity and overall quality characteristics of prune juice.

Fishways, particularly installed at the estuary, have a purpose to encourage fluent migration for migratory fishes, as well as amphidromous and even freshwater species. Not choosing the laborious traditional method of using traps, we assessed the efficiency of the two fishways installed at the west and east barrage of the Nakdong River estuarine barrage respectively, by analyzing the videos recorded through automatic monitoring system. We randomly selected 30 videos monthly at each fishways and identified what kind of fishes were using the fishways and categorised their behaviour such as size, time and whether they passed the monitoring system or not. As a result, a total 8 families 14 species were recorded by monitoring system, with the most dominance of Erythroculter erythropterus (Relative Abundance: 59.5%), followed by Micropterus salmoides (R.A: 19.9%) and Mugil cephalus (R.A: 9.9%). The monitoring system can capture passing fishes during night but the number of appearances of fish species at each hour of a day indicated significant diurnal activities (p<0.05). When fishes pass the monitoring system, approximately 70% of them passed through the monitoring device, while 17% of them showed fallback movement. Our finding indicates that species-specific characteristics of each fish are well represented through video monitoring method. In order to maximise advantages of using video monitoring, it is necessary to consider the installation point properly so that the monitoring system does not interfere with the movement of fish. Also, the utilisation of AI technology in the future is also necessary.

Infrared radiation accounts for approximately 50% of the solar spectrum. Specifically, the near-infrared (NIR) spectrum, ranging from 760 nm to 2500 nm, is primarily responsible for solar heat gain, increasing indoor temperatures and reducing heating and cooling efficiency. To address this issue, we developed a highly transparent thermo-shielding flexible film that maintains a high transmittance of the visible region (T = 80%) while reducing the transmittance of the NIR region (T ≈ 0%). NIR-absorbing indium tin oxide (ITO) nanocrystals were coated onto polyethylene terephthalate (PET) films, and both films were sandwiched to improve the NIR absorption properties and protect the nanocrystal film layer. The fabricated films were applied to a model house and decreased the indoor temperature by approximately 8°C. Our study demonstrates that energy consumption can be reduced by ITO nanocrystal-coated flexible films, with potential implications for the smart window and mobility markets.

강도다리 대상 수인성 카드뮴 독성 영향을 확인하기 위해 96시간 동안 0, 2.5, 5, 10, 20, 40 mg Cd2+/L 에 노출시켰으며, 96시간 반수치사농도(LC50)는 21.42 mg Cd2+/L로 나타났다. 혈액학적 성상분석에서 Hematocrit와 Hemoglobin은 20 mg Cd2+/L에서 유의하게 증가하였다. 혈장 무기성분에서 calcium은 20 mg Cd2+/L에서 유의적으로 감소한 반면 magnesium은 유의적 변화가 없었다. 혈장 유기성분인 glucose는 카드뮴 노출에 의해 유의적으로 증가하였다. 혈장 효소 성분인 AST, ALT 및 ALP는 수인성 카드뮴 노출에 의해 20 mg Cd2+/L에서 유의적으로 증가하였다. 본 연구를 통해 수인성 카드뮴 급성 노출이 강도다리 혈액학적 성상 및 혈장성분 내 독성을 유발함을 확인하였으며, 이로 인한 사망률 유발 가능성을 예상할 수 있다.

도로분야와 관련된 기준에서 도로법, 도로의 구조·시설 기준에 관한 규칙, 도로 건설기준(KDS/KCS 44 00 00) 등 관련 법령을 근거로 제정된 기준은 상위기술기준으로 분류되며 그 외 지침, 편람, 매뉴얼, 가이드라인 등은 하위기술기준으로 구분된다. 상위기술기준은 도 로법, 건설기술진흥법 등을 근거로 제정되어 활용되고 있으나, 지침, 편람, 가이드라인 등으로 분류되는 하위기술기준은 소관부서에서 주관하여 필요한 상황에 따라 제정하여 현장에서 활용되고 있다. 법령을 근거로 하는 상위기술기준은 국가건설기준센터, 소관부서 등 에 의해 지속적으로 관리되고 있는 반면에 하위기술기준은 제정 당시 시점의 상위기술기준을 준용하여 제정 후 현행화 등의 후속 관 리가 체계적으로 수행되고 있지 않아 현행 상위기술기준과의 연계성이 떨어지고, 상충되는 문제가 야기되고 있다. 본 연구에서는 현재 까지 발행, 고시 또는 배포된 도로분야의 하위기술기준의 관리를 위한 현황 조사와 함께 전문가 검토를 통한 하위기술기준의 활용성 을 확보하기 위한 방안을 모색하기 위한 기초자료를 마련하고자 하였다. 도로분야 하위기술기준에 대한 현황 조사를 수행한 결과에서 는 현재 150여 개의 하위기술기준이 배포된 것으로 파악되었다. 조사 결과를 바탕으로 도로분야 설계 및 도로 시공 분야 전문가 검토 를 통해 현장에서의 활용 가치가 있는 하위기술기준은 존치하는 방향으로, 현행 상위기술기준과의 연계성, 현장 활용도가 떨어지는 하 위기술기준은 폐지하는 방향으로 분석하여 도로분야 하위기술기준의 현장 활용성 확보를 위한 자료를 마련하였다.

PURPOSES : Construction standards have resolved overlaps and conflicts between different standards and fields through the introduction of a code system. However, the sub-technical standards were established based on the construction standards at the time of their creation and have not been revised. This has resulted in poor integration and conflicts with revised construction standards, reducing their practical applicability in the construction field. Consequently, to enhance the practical applicability of sub-technical standards and ensure their integration with construction standards, this study aimed to devise technical guidelines for sub-technical standards. METHODS : A brainstorming session was conducted with field experts to evaluate the applicability and necessity of the currently distributed sub-technical standards in the field. Each sub-technical standard was reviewed to determine whether it should be retained or abolished. On the basis of the review results, this study developed a set of draft technical guidelines (Korean Design Standard Guideline (KDSG)/Korean Construction Specification Guideline (KCSG)) for the sub-technical standards that required retention. RESULTS : A comprehensive survey of sub-technical standards identified a total of 154 standards. Of these, 109 were deemed necessary to retain, whereas 45 were considered unnecessary to retain. Among the sub-technical standards requiring retention, 20 were selected for the development of technical guidelines based on their relevance and applicability to the construction standards. A draft of these technical guidelines was subsequently prepared. CONCLUSIONS : A plan was devised to assign technical guideline codes to 20 subordinate technical standards that were deemed consistent with the road construction standards (KDS/KCS 44 00 00). This approach can provide a foundation for reorganizing the system of road construction standards and subordinate technical standards, thereby enhancing their practical usability in the construction field.

본 연구의 목적은 백두대간의 지리산과 덕유산을 이어주는 생태통로인 영취산의 식생구조를 파악함으로써, 백두대간보호지역의 효과적인 보전 및 관리를 위한 기초자료를 제공하는 것이다. 백두대간보호지역 내 총 31개의 조사구(400㎡)를 설치하여 식생조사를 수행하였다. 분석결과 영취산일 대 총 4개의 군집으로 나타났는데 신갈나무-조릿대 군집(Com. 1) 신갈나무-가는잎그늘사초 군집(Com. 2), 군집 3은 물푸레나무 군집(Com. 3) 그리고 신갈나무-미역줄나무 군집(Com. 4)로 분석되었다. 각 군집의 지형특성은 해발고도, 북사면정도(Northness), 경사도, 암노출도에서 통계적 유의차가 있는 것으로 나타났다(p<0.05). NMS ordination 결과 종합설명력 0.749로 나타났으며 종풍부도, 종다양도, 해발고도와의 영향이 있는 것으로 나타났다. 본 연구대상지는 숲틈에 의한 전형적인 2차림 형태로 나타났다. 특히, 숲틈 내 미역줄나무가 다수 출현하면서 신갈나무의 분포와 상관관계가 있는 것으로 분석되어(cut off R2=0.3) 향후 만경류 식물 피해에 대한 연속적인 모니터링이 필요하다.

Purpose: This study aimed to explore the experiences of instructors who participated in and operated a parent education program utilizing the Juingong-gwan practice at the H Science Institute, and to understand the meaning and essence of this program. Methods: This study employed a qualitative content analysis. In-depth individual interviews were conducted with six instructors who participated in the parental education program at H Science Institute. Data were collected over three months from July to September 2023. Results: Seven main themes were identified from the instructors’ experiences in the parent education program at the H Science Institute. The main themes include “Participation with various motivations,” “The essense of parent education: team discussions,” “Feeling compassion and responsibility,” “Challenges in creating lectures,” “Realizing the possibility of mutual change,” “Growth and Transformation through instructor and helper roles,” and “Hope to spread awareness.” Conclusion: This study confirmed that the parent education program utilizing the Juingong-gwan practice at H Science Institute promotes positive changes for both parents and instructors. It also suggests the need for program development, including the use of online platforms, the introduction of step-by-step advanced courses, the provision of follow-up programs, and the expansion of programs that support both teachers and parents.

이 연구는 한·중·일이 각각 선포한 배타적 경제수역이 중첩되는 수역의 법적 성격과 연안국 및 기국의 권리와 의무를 분석한다. Ⅱ장에서는 한·중·일의 배타 적 경제수역의 선포와 연안국 간 잠정어업협정 체결로 형성된 법적 사실관계를 정리하고, 해당 수역을 배타적 경제수역(EEZ), 잠정적 공동관리 구역 (provisional joint regulation zones), 유보 수역(reserved waters)으로 분류하여, 분쟁수역이 배타적 경제수역과 공해의 이중적 성격을 갖는다는 결론의 전 제를 도출한다. Ⅲ장에서는 분쟁수역이 배타적 경제수역 또는 공해로서의 이중적 법적 성격 을 갖는 근거를 제시하고, 분쟁수역에 대한 배타적 경제수역과 공해의 법리 적 용 논거를 통해 연안국 및 기국의 권리와 의무를 쟁점 사안별로 검토한다. 특 히, 공해의 법리가 적용되는 논거에서는 UN해양법협약상 배타적 경제수역의 공해적 특성과 분쟁수역의 특성에 따른 공해의 법적 성격을 구분하여 살펴본 다. 해당 수역의 잠재적 법적 성격을 분석함으로써 동북아시아 내의 분쟁수역 에 대한 구체적 이해에 기여한다.

Broccoli and cabbage are known to have antioxidant, cholesterol-lowering, and anticancer effects due to their high bioactive component levels. This study applied 70% ethanol and hydrothermal extraction to separate bioactive components from broccoli and cabbage. 30oBrix extracts were freeze-dried and then diluted in various concentrations with distilled water for analysis. Total polyphenol contents, DPPH radical scavenging activity, ABTS radical scavenging activity, ferric ion reducing antioxidant power, and hydrogen peroxide scavenging activity were analyzed. The diverse antioxidant assays, except DPPH radical scavenging activity, showed that hydrothermal extracts had significantly higher activity than the 70% ethanol extracts (p<0.05). In this study, it suggested that hydrothermal extraction is relatively effective in producing broccoli and cabbage extracts. Moreover, hydrothermal extraction conditions could be low-cost and environmentally friendly.

본 연구에서는 인천광역시에서 유통 중인 한약재의 안 전성을 확인하기 위해 24품목의 50건을 대상으로 345종 의 잔류농약을 분석하였다. 잔류농약은 미량으로도 인체 의 건강에 해를 가할 수 있는 유해 물질로 주의가 필요하 다. 기준 규격외 다양한 잔류농약 확인을 위해, QuEChERS 법으로 전처리후 분석한 결과, 7품목 24건(48%)의 한약재 에서 총 22종의 잔류농약이 검출되었으며, 농약이 검출된 한약재는 천궁, 택사, 당귀, 백지 순으로 많았다. 검출 농 약 중 2건을 제외하고는 모두 기준이 설정되어 있지 않은 농약이었으나, 위해 평가 결과 안전한 수준으로 확인되었 다. 또한, 동일 품목에서 다빈도로 검출되는 농약을 확인 하여, 해당 품목의 지속적인 잔류농약 모니터링의 필요성 을 시사하였으며, 대한약전의 전처리법에 따른 비교분석 에서도 동일한 농약이 검출되어, QuEChERS법을 이용한 생약의 잔류농약 분석 가능성을 제시하였다. 결과적으로, 소비자 안전을 위해서 기준규격 잔류농약 항목 외에도, 생 약에 대한 지속적인 잔류농약 모니터링과 신뢰성 높은 고 효율 분석법 개발 연구가 계속 필요할 것이다.

Yeosu National Industrial Complex is one of Korea’s representative petrochemical industrial complexes where crude oil refining and petrochemical companies are concentrated. According to the results of the 2021 chemical emissions survey, during the process of manufacturing, storage, and transportation at the Yeosu National Industrial Complex, various hazardous chemicals, including hazardous air pollutants, volatile organic compounds and odorous substances are being emitted into the air, affecting the surrounding environment and the health of residents. The Ministry of Environment is applying strengthened standards by designating the Yeosu National Industrial Complex as an air conservation special measure area and establishing odor management areas to manage the air environment. Nevertheless, odor complaints continue to be registered and related complaints increase when turnaround work is carried out. Since air emissions are not counted during periods of turnaround as normal operations are temporarily suspended, it was difficult to establish policies to reduce odor complaints because the source of emissions and emission quantities cannot be ascertained with certainty. In this study, the extensive Yeosu National Industrial Complex was subdivided into 4 areas using a mobile vehicle equipped with PTR-ToF-MS capable of real-time analysis without sample pretreatment being carried out. Measurements were repeated during the day, night, and dawn while moving around the internal boundary of the plant and the boundary of each region where turnaround activities were being carried out. As a result, the recorded measurement for acrylonitrile was the highest at 6340.0 ppb and propyne and propene were measured the most frequently at 128 times each. Based on these results, it will be possible to help reduce emissions through process improvement by efficiently operating air measurement networks and odor surveys that conduct regular measurements throughout the year and providing actual measurement data to the plant. Also, it will help reduce odor complaints and establish systematic air management policies.

Purpose: This study aims to explore the in-depth experiences of participating in a parent education program at the H Science Institute and understand the meaning and essence of their experiences. Methods: This study employed qualitative content analysis. Data were collected from June 20 to 30, 2023. Participants were a total of 28 people who could provide detailed experiences of participation in the parent education program at the H Science Institute. Focus-group interviews were conducted with 28 participants. Results: The qualitative content analysis revealed six themes: “Exploring the genuine path to become a parent”, “Precious experiences acquired through education that is not easily accessible”, “Discovering the transformed self through education”, “I believe that there had been a change in family relationships”, “Improvements are required in a few contents”, and “I look forward to the program with more extended outreach”. Conclusion: Efforts are required to understand the current status of parent education, verify its empirical effectiveness, and provide parents with awareness of the necessity to observe and control their minds.

Captive breeding and reintroduction are crucial strategies for conserving endangered species populations. However, fish raised in predator-free environments, show a lack of recognition of predationrelated stimuli such as chemical and visual signals. It is critical to recognize chemical signals from injured conspecifics, also known as alarm signals, and the order or shape of predators to indicate the spread of predation risk in the habitat. We conducted a laboratory experiment to determine and adjust the optimal exposure period to induce appropriate anti-predator behavior response to different types of stimuli (Chemical, Visual and Chemical+Visual) for the endangered species Microphysogobio rapidus. Our results demonstrate that predator avoidance behavior varies depending on the types of stimuli and the duration of predation risk exposure. First, the results showed captive-breed M. rapidus show lack of response against conspecific alarm signal (Chemical cue) before the predation risk exposure period and tend to increase response over predation risk exposure time. Second, response to predator (visual cue) tend to peak at 48 hours cumulative exposure, but show dramatic decrease after 72 hours cumulative exposure. Finally, response to the mixed cue (Chemical+visual) tend to peak prior to the predation risk exposure period and show reduced response during subsequent exposure periods. This experiment confirms the lack of responsiveness to conspecific alarm signals in captive-bred M. rapidus and the need for an optimal nature behavior enhancement program prior to release of endangered species. Furthermore, responsiveness to predator visual signal peak at 48 hours cumulative exposure, suggest an optimal predation risk exposure period of up to 48 hours. Key words: predator cognition, captive breeding, chemical signal, visual signal, endangered

To determine the cause of the population decline in Gobiobotia naktongensis, substrate preference and burying behaviour were investigated in this study. In general, the species was shown to prefer a substrate size of 1 mm or less, depending on the flow. In addition, the burying depth varied according to the size of the fish and increased with a decrease in water temperature. Our findings showed that the main cause of the population reduction was the physical changes in the substrate structure due to the dams or barrages construction. Notably, the accumulation of silt and mud in the substrate upon the formation of an upstream lentic water region for structural construction and bed armouring caused by scouring and reduced downstream inflow of fine sediment were deterministic in the fish habitat changes, causing problems in burying. As sand substrate structure is critical for the survival and inhabitation of psammophilous species, efficient strategies should be developed with proper habitat management to reduce the anthropogenic damage

Dissolved organic matter (DOM) is a key component in the biogeochemical cycling in freshwater ecosystem. However, it has been rarely explored, particularly complex river watershed dominated by natural and anthropogenic sources, such as various effluent facility and livestock. The current research developed a new analytical method for TOC/TN (Total Organic Carbon/Total Nitrogen) stable isotope ratio, and distinguish DOM source using stable isotope value (δ13C-DOC) and spectroscopic indices (fluorescence index [FI] and biological index [BIX]). The TOC/TN-IR/MS analytical system was optimized and precision and accuracy were secured using two international standards (IAEA-600 Caffein, IAEA-CH-6 Sucrose). As a result of controlling the instrumental conditions to enable TOC stable isotope analysis even in low-concentration environmental samples (<1 mgC L-1), the minimum detection limit was improved. The 12 potential DOM source were collected from watershed, which includes top-soils, groundwater, plant group (fallen leaves, riparian plants, suspended algae) and effluent group (pig and cow livestock, agricultural land, urban, industry facility, swine facility and wastewater treatment facilities). As a result of comparing characteristics between 12 sources using spectroscopic indices and δ13C-DOC values, it were divided into four groups according to their characteristics as a respective DOM sources. The current study established the TOC/TN stable isotope analyses system for the first time in Korea, and found that spectroscopic indices and δ13C-DOC are very useful tool to trace the origin of organic matter in the aquatic environments through library database.

To investigate residual pesticide levels in agricultural products contained in Meal-kits, 27 Meal-kit products were collected from marts, Meal-kit shops, and online stores in Incheon City, South Korea. Seventy-six vegetable and thirty-seven mushroom products were analyzed for residual levels of 339 pesticides. Residual pesticides were detected in 23 out of 76 vegetables and were not present in the 37 mushroom products. The residual pesticide detection rate was 20.4% (23/ 113 cases). The pesticides famoxadone 0.034 mg/kg (standard: 0.01 mg/kg or less, PLS) and fenpyroximate 0.302 mg/kg (standard: 0.01 mg/kg or less, PLS) exceeded their maximum residue levels (MRL). This survey revealed that various types of pesticides remain in agricultural products in Meal-kits. Due to the nature of Meal-kit products, there is no separate standard for residual pesticides in agricultural products. Therefore, continuous monitoring of residual pesticides is necessary.

Purpose: This study aims to not only understand the meaning and essence of patients’experiences visiting the Raphael Nanum Homeless Clinic but also explore what kind of healthcare programs they would like to have in the future by appraising patients’experiences in depth. Methods: This study employed a qualitative content analysis method. The data were collected from June 11, 2023, to June 25, 2023. A total of 17 patients who could provide detailed experiences of their visit to the Raphael Nanum homeless clinic participated in this study. We conducted a focus group interview with 6 patients and in-depth one-on-one interviews with the remaining 11 patients. Results: The qualitative content analysis result revealed five themes: “visiting a free clinic for various paths,” “positive experiences at the free clinic,” “negative experiences at the free clinic,” “dissatisfaction with the clinic site,” and “anticipation for the future of the free clinic.” Conclusion: To ensure the right to health and survival of marginalized populations in the future, it is necessary to establish comprehensive healthcare support measures, which include enhancing the facilities of the free clinic and expanding the range of available medical specialties.