Vehicle indoor air quality is determined by the complex interaction between interior material emissions (such as VOCs and aldehydes) and road-sourced pollutants. Despite growing public concern, existing frameworks often focus on single pollutants and lack a comprehensive health-impact-based evaluation. This study proposes the Vehicle Indoor Air Quality Index (VIAQI), which integrates acute, chronic, and odor-related exposures from internal sources with the infiltration of ambient air pollutants. The VIAQI adopts a safety-oriented priority (HQacute → SF → OA → HQchronic), reflecting the driver’s cognitive safety. It consists of 10 levels, ranging from Grade 1 (Excellent) to Grade 10 (Hazardous). Under three operating modes (AM, PM-6 hr, and DM), the analysis includes 21 chemical substances, as well as PM2.5 and NO2. Acute risks are assessed using OEHHA’s RELs, chronic risks via US EPA’s RfC, odor effects are quantified using a smell sensitivity index (SF), and outdoor air infiltration is evaluated through a weighted hazard index (OA). After evaluating actual new vehicles, Vehicles A, C, and D are categorized as Grade 3 (Good), while Vehicle B is categorized as Grade 9 (Very Unhealthy) and Vehicle E is categorized as Grade 10 (Hazardous). Notably, Vehicle B is rated Grade 9 due to acute toxicity risks identified through RELs-based assessment, even though it meets all current national regulatory standards. This highlights the existence of health hazards that conventional concentration-based regulations may overlook. As Korea’s first multi-dimensional evaluation system for vehicle air quality, the VIAQI offers a practical tool for manufacturers to implement quality control, set policy, and communicate consumer information, providing a proactive assessment based on real-world driving environments.

Odorous emissions from large industrial complexes exhibit significant spatial and temporal variability, which complicates quantitative evaluation and source identification. Odor perception may occur even at low concentrations, and emission characteristics are strongly influenced by industrial processes, meteorological conditions, and local topography. Therefore, odor management strategies based solely on compliance with emission standards have inherent limitations. The Yeosu National Industrial Complex was designated as an odor management area in 2019, and annual surveys of complex odor dilution ratios and specified odor substances have been conducted since then. Despite the accumulation of monitoring data, odor complaints from nearby residential areas have continued. In this study, multi-year (2020-2024) odor monitoring data were integrated with complaint records, and GIS-based mapping and visualization were applied to examine the spatial distribution characteristics of measured odor levels and complaint locations. Map-based visualization facilitated visual comparison of complaint locations and monitoring sites and enabled a comparative assessment between monitoring sites and complaint locations. The results revealed clear spatial heterogeneity among monitoring sites. In particular, the A3 monitoring site recorded the highest annual average dilution ratio, indicating persistent structural characteristics of odor emissions in that area. Although measured odor intensity was relatively higher in summer, complaint frequency peaked in spring and autumn, suggesting that meteorological conditions and human exposure patterns significantly influence perceived odor nuisance. These findings demonstrate that measured odor intensity alone does not fully explain complaint occurrence and highlight the necessity of integrated odor management approaches that incorporate spatial dispersion characteristics, seasonal variability, and community exposure factors. The results can serve as a foundational basis for improving monitoring site placement and establishing spatially differentiated odor management policies.

This study was conducted to analyze long-term trends in moisture content and regional distribution characteristics of winter forages produced in Korea. A total of 14,204 samples collected from forage production farms and TMR facilities across 128 Si/Gun units nationwide from 2015 to 2024 were analyzed for moisture content, and annual, regional, and species-specific trends were examined accordingly. The overall mean moisture content was 34.82 ± 16.68%, with a declining trend from 46.70% in 2015 to 30.71% in 2024. Among the forage species, Italian ryegrass showed the lowest mean moisture content (29.44 ± 13.31%), decreasing consistently from 41.16% in 2015 to 23.91% in 2024, contributing substantially to the overall declining trend. Regional variation in moisture content was associated with differences in forage storage type composition, with Gangwon province showing higher moisture content corresponding to a greater proportion of silage, while Jeonbuk province showed lower moisture content with a higher proportion of hay. No statistically significant correlations were found between moisture content and environmental factors including precipitation and drainage installation rate (p>0.05), suggesting that final moisture content is likely influenced by multiple factors beyond regional precipitation, highlighting the need for further studies including direct variables like post-harvest management. The proportion of hay increased from 7.8% in 2015 to 32.3% in 2024, while silage decreased from 43.9% to 15.0%, a trend that coincides with the implementation of the national forage quality grading system initiated in 2015, suggesting a possible association. These results provide baseline data for developing region-specific forage production and quality management strategies in Korea.

This study evaluated the growth characteristics and forage productivity of quackgrass (Agropyron repens) and meadow foxtail (Alopecurus pratensis) as novel forage resources under abnormal climatic conditions in Cheonan, Chungcheongnam-do, South Korea, during the 2024–2025 growing seasons. Both species, sown on 26 September 2024, exhibited good establishment, vigorous pre-winter growth, and strong cold tolerance. Following harvest, quackgrass and meadow foxtail showed superior regrowth compared with orchardgrass and tall fescue. Dry matter yields of quackgrass (QG2), a mixed sward of meadow foxtail (50%) and quackgrass (50%), tall fescue and quackgrass (QG1) were 21.4, 20.4, 19.2 and 19.0 t ha⁻¹, respectively, with no significant differences among treatments. In contrast, the dry matter yield of meadow foxtail alone (18.4 t ha⁻¹) was significantly lower than that of quackgrass (QG2) (p<0.001). Crude protein contents of quackgrass and meadow foxtail (12.3% and 13.4%, respectively) were higher than that of tall fescue (11.9%), whereas total digestible nutrient contents ranged from 61.4% to 61.7%, slightly lower than those of tall fescue. These results suggest that quackgrass and meadow foxtail are promising forage species for mixed pasture systems to enhance adaptability to abnormal climatic conditions.

Odorous compounds from the operation of wastewater treatment plants (WWTPs) have increasingly become public health concerns and civil complaints. This study identifies priority management stages in WWTPs by quantitatively analyzing the distribution of complex odor and designated odor substances across key processes using a dimensionless tool (the Odor Activity Value, OAV), while providing a statistical basis and operational strategies for efficient odor mitigation in public facilities. Although there was a very poor correlation between designated odorous concentrations and complex odor level (dilution ratio), the application of the OAV yielded much more accurate results with a strong correlation (R2 = 0.7) specifically at high-temperature condition. Odor potential in the wastewater treatment processes fluctuates substantially depending on the specific unit. Statistical analysis using Kruskal–Wallis tests demonstrated that influent and sludge treatment process (return flow and centrate) produce much higher odor intensities compared to the biological reactor and secondary clarifier. Based on PERMANOVA analysis, differences in the profiles of complex odor and the OAVs of designated odorants across 6 treatment stages explained 64.1% of the total variance. Principal Coordinates Analysis (PCoA) showed that sludge treatment processes form a distinct, unique cluster, whereas sewage treatment streams present a more gradual transition of odor profiles. Statistical assessment using the Mann-Whitney U test demonstrated that mean odorants levels did not have considerable shift under high-temperature and low-temperature conditions. However, the sensory perception in higher temperatures enhanced relative to the OAVs. In conclusion, the OAV is an effective dimensionless tool, as it establishes priorities in odor management and control, offering a practical supplementary indicator for addressing civil complaints. These findings provide a robust foundation for optimizing deodorization systems designs and operational efficiency of odor mitigation systems within WWTPs.

This study examined the community structure of macrobenthic animals in the southern East Sea through seasonal surveys at 12 stations from November 2022 to August 2023. A total of 226 species were identified, dominated by polychaetes (102 species, 45.13%), arthropods (59 species, 26.11%), and molluscs (38 species, 16.81%). The total abundance was 1,189 ind. m-2, with polychaetes and arthropods accounting for 740 ind. m-2 (62.26%) and 266 ind. m-2 (22.36%), respectively. Biomass reached 109.93 gWWt m-2, dominated by echinoderms (38.76 gWWt m-2, 35.26%) and molluscs (33.78 gWWt m-2, 30.73%). According to the LeBris index, the top 10 dominant species accounted for 62.92% of the total individuals, including Ampelisca bocki (amphipod), Scoletoma longifolia, Sternaspis scutata, and Magelona japonica (polychaetes). Cluster analysis revealed two distinct groups in the study area: Group I, which comprised shallow stations with higher sand content and species diversity, was dominated by S. scutata, M. japonica, and Moerella hilaris. Group II included deeper stations characterized by higher mud content and lower diversity, primarily dominated by A. bocki and S. longifolia. These findings suggest that the macrobenthic community structure in the study area is largely influenced by water depth and sediment composition. Previous studies have indicated that in the southern East Sea, mud predominates, while sand content and species diversity increase towards the coast. In contrast, the central East Sea is dominated by sand, with both mud content and diversity increasing offshore. These sediment differences between the southern and central East Sea play a crucial role in shaping macrobenthic community structure.

인간과 반려동물은 동일한 생활 환경을 공유함에도 불 구하고, 대부분의 감염병은 병원체–숙주 공동 진화, 종 특 이적 수용체, 면역 체계 차이에 의해 종 간 전파가 제한 되어 왔다. 그러나 SARS-CoV-2(COVID-19) 팬데믹 이후 인간에서 반려동물로 병원체가 전파되는 역인수공통감염 (reverse zoonosis) 사례가 다수 보고되며 기존 종 장벽 개념의 한계가 드러났다. 본 리뷰는 병원체의 숙주 적응 기전, 수용체 결합 특이성, 선천 및 적응 면역 반응 차이 를 중심으로 종 장벽의 생물학적 기전을 체계적으로 고찰 하고, 개·고양이 등 주요 반려동물에서 확인된 역인수공 통감염 사례를 감염 단계별 위험 평가 틀로 재분류하였 다. 또한 인간–반려동물 간 감염을 단절된 사건이 아닌 생물학적 연속선상에서 이해함으로써, One Health 관점 의 통합적 감시·대응 전략의 필요성을 제시하였다. 이러한 접근은 불필요한 사회적 불안을 완화하는 동시에 신종 변이 출현 가능성을 조기에 차단하고, 공중보건과 동물보 건을 아우르는 감염병 관리 체계 구축에 기여할 것으로 기대된다.

열대거세미나방의 저온 내성에 관여하는 분자적 기작을 규명하기 위하여, 4°C 저온 처리 후 뇌 조직을 대상으로 전사체 분석을 수행하였 다. 그 결과 총 266,051개의 유니진(unigene)이 확보되었으며, 저온 처리군에서 6,917개의 유전자가 차등발현을 보였다. 저온 반응에서는 상향 조절 유전자보다 하향 조절 유전자가 전반적으로 더 많이 나타났다. 차등발현 유전자 중에서는 저온 스트레스 반응과 관련있는 단백질 안정화, 세포막 안정성, 및 에너지 대사 관련 유전자들이 다수 확인되었다. 특히 Hsp와 PGPEP1은 50배 이상 상향 조절되었고, RN7SK는 저온 처리군에 서 175배 수준으로 현저히 하향 조절되었다. 주요 차등발현 유전자에 대한 정량적 RT-PCR 분석 결과, RNA-Seq 분석과 일치하는 발현 경향이 확인되었다. 본 연구는 열대거세미나방의 저온 적응에 대한 분자생리학적 이해를 확장하며, 저온 저항성 및 환경 적응 연구를 위한 후보 분자마커 를 제시한다.

Betulin, a pentacyclic triterpenoid, abundantly accumulated in Inonotus obliquus (chaga mushroom), exhibits strong anti-inflammatory, antioxidant, anticancer, and wound-healing properties. However, its extraction remains challenging due to its poor solubility and thermal sensitivity. In this study, we optimized ultrasound-assisted extraction (UAE) using response surface methodology (RSM) to maximize simultaneous betulin and antioxidant compound recovery from I. obliquus. We evaluated three extraction variables (i.e., time, temperature, and ethanol concentration) using a three-factor, five-level design. All quadratic models were significant (p < 0.05), with R² values ranging from 0.83 to 0.93 and prediction errors remaining below 5 %, thereby confirming strong model reliability. Multi-response optimization using a superimposed response plot identified 92.08 % ethanol, 42.56 min, and 62.19 °C as a narrow optimal region, in which all responses simultaneously met the desired criteria. Under these conditions, extraction was predicted to yield high phenolic content (2.58 mg GAE/g DM), increased flavonoid levels (0.57 mg QE/ g DM), strong DPPH radical-scavenging activity (87.49 % DSA), and a betulin content of 2.00 mg/g DM. In contrast, low ethanol concentrations, excessive heating, or prolonged extraction times resulted in reduced yields due to the oxidative or thermal degradation of the bioactive constituents. Overall, the optimized extraction conditions emphasize the importance of controlling solvent polarity and balancing the temperature and time parameters to prevent thermolabile compound decomposition. These results provide a reproducible and eco-efficient framework for large-scale antioxidant constituent extraction from I. obliquus.

본 논문은 펫 휴머니제이션 현상으로 펫푸드 시장이 질적으로 고도화되었음에도, 불구하고, 여전히 「사료관 리법」상 축산 생산 수단적 관점에 머물러 있는 현행 관 리 체계의 한계를 조명하고 실증적인 물성 표준화 방안 을 제시하고자 수행되었다. 우선 KS H 4897 및 법정 관 리 체계와의 비교·분석을 통해 펫푸드 물성 규격화의 제 도적 미비점을 규명하였다. 또한, 반려견 보호자 71명을 대상으로 시행한 설문조사 결과, 응답자의 97.0%가 제품 구매 시 물성을 주요하게 고려하나 54.0%는 제조사별 다 른 마케팅 용어로 인해 선택의 어려움을 겪고 있음을 확 인하였다. 특히 단단한 제형으로 인한 치아 및 잇몸 손상 경험(15.0%)과 습식 급여 중 사레 경험(46.0%) 등 실질적 인 급여 안전사고 실태를 통해 정량적 지표 도입의 당위 성을 확보하였다. 이를 바탕으로 반려견의 해부학적 구조 와 체급별 치악력 등 수의학적 근거를 반영하여 유동식 부터 고강직식까지 아우르는 5단계의 ‘반려견 Texture-Code’를 도출하였다. 본 논문은 영양 성분에 치 중되었던 기존 품질 관리 패러다임을 물리적 섭식 안전 분야로 확장하고, 향후 반려동물의 지위 변화를 반영한 선진적 사료 관리 체계 수립을 위한 기초 자료를 제공한 다는 점에서 학술적·제도적 의의를 지닌다.

This study was conducted to investigate the changes in physicochemical characteristics and nutritional components of oak-grown Lentinula edodes extracts following fermentation using various lactic acid bacteria (LAB), with the aim of evaluating its potential as a functional and high-value material for health functional foods. The control group consisted of non-fermented oak-grown L. edodes extract; for fermentation, multiple strains of Lactobacillus plantarum, Leuconostoc lactis, Lactobacillus acidophilus, Lactobacillus sakei LJ011, Lactobacillus sakei LI033, Lactobacillus sakei LGy039, Pediococcus pentosaceus ALJ015, Pediococcus pentosaceus ALJ024, and Pediococcus pentosaceus ALJ026 were used. The fermented samples were analyzed for proximate composition, free sugars, ergosterol, vitamin D2, β-glucan, and nucleotides. In proximate composition analysis, L. acidophilus-fermented L. edodes (LE_LA) exhibited the highest crude protein and crude fat contents, whereas P. pentosaceus ALJ026-fermented L. edodes (LE_PP ALJ026) showed the highest ash and crude fiber levels. Regarding free sugars, L. sakei LJ011-fermented L. edodes (LE_LS LJ011) showed the highest sucrose concentration. Ergosterol and vitamin D2 contents were significantly higher in LE_LA, at 422.63mg% and 0.18mg%, respectively. The β-glucan content also increased in all fermented samples, with the highest value (37.27%) found in LE_LA, indicating an enhancement in immune-related functional components through fermentation. Nucleic acid compounds such as 5’- GMP, 5’-IMP, and 5’-XMP were markedly through fermentation. Nucleic acids, LE_LA and P. pentosaceus ALJ026-fermented L. edodes (LE_PP ALJ026). Overall, LAB fermentation of oakgrown L. edodes notably improved the contents of bioactive compounds such as β-glucan, ergosterol, and amino acids. These findings suggest that LAB fermentation can be effectively used to enhance the nutritional and functional properties of oak-grown L. edodes, providing potential for its development as a high-value functional food ingredient.

This study investigated indoor air quality (IAQ) in 302 facilities (consisting of 638 monitoring points) across five types of multi-use facilities for the health of vulnerable populations in Seoul. The facility types consisted of the following: ICPs (indoor children’s playgrounds), PCCs (postnatal care centers), ECFs (elderly care facilities), HCFs (health care facilities), and CCCs (child care centers). The investigation was carried out over a 1-year period, from January to December 2024. The objective of this research was to provide a scientific basis for IAQ management by identifying characteristics specific to facility types and potential risk levels for vulnerable populations in Seoul. Five indoor air pollutants (PM10, PM2.5, CO2, HCHO, and TAB) were continuously measured, and their concentration distributions, temporal variability, and multi-pollutant patterns were analyzed using data visualization and statistical methods. Boxplots and ridgeline plots characterized distributions and seasonality by facility type, while star plots and K-means clustering were used to examine multi-pollutant combinations and inter-facility pattern differences. Most measurements were within national IAQ standards. However, HCFs and PCCs exhibited relatively higher mean levels and variability of HCHO and TAB, indicating a greater need to control chemical and microbiological sources. CO2 concentrations approached or temporarily exceeded the national standard, particularly in HCFs, reflecting differences in occupant density, occupancy time, and ventilation management. Kruskal-Wallis and pairwise Wilcoxon rank-sum tests revealed statistically significant differences among facility types, particularly for CO2 and HCHO, consistent with the visualized multi-pollutant profiles. K-means clustering identified three IAQ patterns-multi-pollutant-elevated, activity/ventilation-influenced, and low-pollutionindicating that management needs may vary across facilities despite uniform national standards. These findings provide a methodological basis for IAQ big data analysis, policy making, and supporting future research integrating multi-year, outdoor, building, activity, and health data.

This experiment aimed to evaluate the growth characteristics and forage productivity of novel forage resources in order to cope with abnormal climatic conditions in Pungse-myeon, Cheonan City, Chungcheongnam-do, South Korea from 2024 to 2025. Italian ryegrass (IRG), Perennial ryegrass (PRG)+IRG mixtures and Meadow foxtail (MF)+IRG mixtures sown on 26 September 2024 grew vigorously before and after winter, and exhibited strong cold resistance, achieving a 100% overwintering rate. At harvest, plant length of IRG, PRG+IRG mixtures and MF+IRG mixtures reached approximately 118 cm. The heading dates of IRG and MF+IRG (2 May) were 8 days earlier than that of tall fescue. The dry matter yield (11.5 ton/ha) of IRG single pasture did not differ significantly from that of MF+IRG and PRG+IRG mixture, but was 29~30% higher than that of MF and PRG single pasture (p<0.001). The crude protein content of IRG and MF+IRG mixture was 7.0%, which was lower than that of MF (9.6%) and tall fescue (9.0%). The total digestible nutrient content of MF+IRG mixture was 63.2%, slightly lower than that of IRG but higher than that of tall fescue. In conclusion, these findings demonstrate that PRG+IRG and MF+IRG mixtures have strong potential as novel forage resources to mitigate cold damage of IRG under abnormal climatic conditions.

최근 폭염·폭우 등 극한기후의 증가와 공항 포장의 고하중·고타이어압 하중 조건으로 인해 조기 열화 및 파손 위험이 커지는 상황에 서 본 연구는 국내 포장 입도의 공항 에어사이드 표층 적용 가능성을 평가하고 국내 실정에 맞는 품질관리 및 적용 기준 마련을 목적 으로 수행되었다. 이를 위해 국내 바인더 3종(PG 64-22, 76-22, 82-22)에 대해 DSR, BBR, MSCR 시험을 실시하여 고온 소성변형 저 항성과 개질 바인더 적용 적합성을 검토하고, FAA Gradation 1, 2와 국내 입도(WC-2, WC-4, WC-5, SMA-13 mm)를 사용한 혼합 물을 제작하여 동탄성계수(E*), 함부르크 휠트래킹(HWTT), 수분저항성(TSR), 피로균열 저항성 등 주요 역학적 성능을 평가하였다. 그 결과, 국내 WC 및 SMA 혼합물은 FAA 입도 혼합물과 비교해 동등하거나 일부 항목에서 상회하는 성능을 나타내어 공항 포장용 재료로서의 적용 가능성을 확인하였다. 향후 철저한 플랜트 관리, 적정 배합설계, 공인시험 기반 품질관리 체계가 확보된다면, 국내 재 료 수급 및 생산 여건을 반영한 합리적인 공항 아스팔트 포장 품질관리 기준 수립의 기초자료로 활용될 수 있을 것으로 판단된다.

콘크리트 포장은 아스팔트 포장에 비해 우수한 내구성에 의한 장기공용성 확보로 잦은 유지보수가 필요없는 포장 형식이 다. 도심지의 교차로는 많은 교통량과 다양한 하중 조건이 집중되는 구간으로 아스팔트 포장에서는 파손이 빈번하게 발생하 고 있어 내구성 확보가 요구된다. 이에 본 연구에서는 도심지 교차로 구간에 적용된 콘크리트 포장의 특성 및 공용성을 분 석하기 위해 일본 나고야시를 방문하여 현장 조사를 수행하였다. 현장 조사 결과, 대부분의 교차로에서 진출입부 구간뿐만 아니라 중앙부까지 콘크리트 포장을 적용하고 있었다. 교차로에 시공된 콘크리트 포장 형식으로는 줄눈 콘크리트 포장과 줄 눈 철근콘크리트 포장이 확인되었으며 공용상태의 경우 경미한 수준의 스폴링 및 대각선 균열 등이 관찰되었다. 일부 교차 로에서는 콘크리트 포장 적용 시 교통차단을 장기간 유지할 수 없어 조강 포틀랜드 시멘트를 사용하는 1DAYPAVE와 슬래 브를 공장에서 사전 제작하여 시공하는 프리캐스트 콘크리트 포장 등 신속하게 교통 개방이 가능한 공법도 적용된 것으로 확인되었다.

싱가포르에서는 1970년대 후반부터 버스 정차와 가감속이 빈번하게 발생하는 버스정류장 및 버스차로 구간을 중심으로 콘크리트 포장을 광범위하게 적용해 왔다. 본 연구에서는 싱가포르 도심지 버스정류장에 적용된 콘크리트 포장의 현장 조사 를 수행하였으며 버스정류장에 적용된 콘크리트 포장의 공법, 연장, 손상 유형 등의 조사를 통해 적용 현황과 공용상태를 분석하였다. 조사 결과, 싱가포르 도심지 버스정류장 구간에는 대부분 줄눈 철근콘크리트 포장이 적용된 것으로 조사되었으 며 약 18~32m의 연장을 지닌 것으로 확인되었다. 줄눈 간격의 경우 주로 8~9m로 형성되어 있으며 손상 유형으로는 줄눈부 스폴링 및 줄눈재 파손, 망상 균열, 대각선 균열 등이 확인되었다.

본 연구는 물-시멘트비, 실리카퓸 및 감수제 혼입에 따른 시멘트 페이스트의 항복응력 및 소성점도 변화를 정량적으로 분석하였다. 또한 혼합 직후부터 60분까지 시간 의존 레올로지 특성을 측정하여 구조적 빌드업 거동을 평가하였다. 실험 결과, 물-시멘트비 증가는 레올로지 저항을 감소시키는 반면 실리카퓸은 일정 함량 이상에서 급격한 점도 증가를 유발하였으며, 감수제는 이러한 증가 경향을 완화하는 역할을 하였다. 특히 변 수 간 교호작용 효과가 유의하게 나타나 단일 변수 최적화만으로는 목표 유동 범위를 확보하기 어려운 것으 로 확인되었다. 또한 실리카퓸 함량이 높은 조건에서는 시간 경과에 따른 항복응력 증가율이 크게 나타나 작 업 가능 시간 단축 가능성이 확인되었다. 본 연구는 다공성 콘크리트용 바인더의 항복응력 및 점도에 대한 정량적 설계 범위를 제시함으로써 다공성 콘크리트 제작을 위한 배합 설계의 기초 자료를 제공한다.