식품 첨가물의 목적은 크게 다르지만, 주로 주요 재료 의 품질을 향상시키거나 안정성을 유지하기 위해 사용하 고 있다. Boric acid는 유럽 연합(EU)에서 식품 첨가물로 허가된 상황이다. 그러나 한국에서는 사용이 허가되어 있지 않은 실정이다. 또한 국내에서는 식품 중 boric acid의 분석 방법이 보고된 적이 없다. 따라서 본 연구에서는 caviar에서 boric acid을 검출하기 위한 분석 방법을 개발 하고 이를 검증하였다. 본 연구에서는 inductively coupled plasma-atomic emission spectroscopy (ICP-AES)를 사용하 여 caviar에 존재하는 boric acid를 측정하였고, 또한 ICPMS를 이용하여 추가적인 정성분석이 가능한 분석법을 확 립하였다. 본 연구에서는 ICP-AES를 사용하여 caviar에서 boric acid의 정량 분석 방법을 확립하였다. 확립된 분석방 법의 유효성 검증을 위해 직선성, 일내 및 일간 정밀도, 정 확도, 검출한계(limit of detection, LOD), 정량 한계(limit of quantification, LOQ) 및 회수율을 포함한 방법 검증을 수행 하였다. 그 결과 검량선은 0.2 μg/mL에서 10 μg/mL 범위에 서 결정계수가 0.99이상인 것을 확인하였다. 검량곡선의 각각의 표준용액에 대한 정밀도는 0.9% 이하로 확인되었 고, 정밀도는 1.3% 이하, 정확도는 98.9-100.6%로 확인하 였다. 검량선 내 서로 다른 농도 3가지 0.5, 2, 10 μg/mL 의 농도에 대한 일내, 일간 정밀도와 정확도를 측정 결과 일내 정밀도는 0.4-0.6%, 정확도는 99.1-100.6%로 확인되 었다. 일간 정밀도는 0.5-2.1%, 정확도는 96.8-100.2%로 확 인되었다. 검출 한계(LOD)와 정량 한계(LOQ)는 각각 0.03 μg/mL와 0.16 μg/mL로 확인되었다. Boric acid의 회 수율 확인결과 0.5, 2 및 10 μg/mL 농도에서 98.0-102.0%, 상대 표준 편차(RSD)는 0.1%-0.4% 사이로 확인되었다. 측 정불확도의 경우 95% 신뢰구간(k=2)에서 불확도(U)는 203.1±10.8 mg/kg으로 산출되었다. 확립된 분석법을 적용 하여 국내외 유통되는 caviar 및 다양한 가공 식품 중에 존재하는 boric acid 와 sodium tetraborate에 잔류량을 측 정한 결과 총 104개의 시료 중 33개 제품에서 46.0-3942.2 mg/kg의 boric acid가 검출되었다. 따라서 본 연구 결과는 국내에 미설정 되어있는 식품첨가물 중 보존료의 기준 규 격 설정 및 관리 나아가 독성 실험을 위한 참고 자료가 될 수 있다고 판단된다.

본 연구에서는 존 어리의 새로운 모빌리티 패러다임의 시선으로 박태 원의 소설가 구보씨의 일일(小說家 仇甫氏의 一日)을 연구하였다. 1930년대 경성이라는 도시 내에서 구보씨(仇甫氏)의 산책로를 따라 한 장소에서 또 다른 장소로 이동하면서 각각의 파편적인 장소에 녹아있는 소설가 구보씨의 개인적 기억과 감정뿐만 아니라 한 시대의 애환과 정서 를 다양한 방향으로의 서술을 가지고 살펴보았다. 특히 이러한 새로운 모빌리티 패러다임 중에서 ‘장소’, ‘이동’, ‘만남’을 중심으로 한 장소 안 에서 그리고 장소 간의 이동 중에서 생긴 만남과 감정을 분석하였다. 대 상과 주체가 이동을 통해 끊임없는 순환과 사회적 위치(계급)의 존재, 다 양한 장소에서 다양한 사물, 정치와 경제, 문화와 교통이 서로 복합적인 관계를 형성하고 있다는 것을 문학작품 분석을 통해 알 수 있었다. 지금 까지 사회학의 관점의 하나인 존 어리의 모빌리티의 패러다임으로 문학 작품을 분석•연구하려는 시도는 거의 없었다. 사회학에서 주로 논의되어 온 모빌리티 개념과 특징을 하나의 문학작품과 연계하여 분석한 결과를 바탕으로 향후 더 많은 문학작품을 살펴보기 위해 인문학과 사회학의 융 합적인 새로운 시도는 필요하다.

This study aimed to provide foundational data for the conservation and improvement of the habitat of an endangered species, Viola websteri, in South Korea, by identifying the environmental characteristics of its habitat and determining main environmental factors influencing its population size. To achieve this, this study conducted literature reviews, field surveys of study sites, and spatial analyses based on previous research results, collecting data for 32 environmental attributes related to V. websteri. These collected data were utilized for factor analysis and path analysis, leading to the identification of environmental factors affecting population size based on scientific analysis processes and results. Additionally, this study examined correlations between population size and environmental factors, focusing on aspects related to amount of light, organic matter, tree height, tree cover, shrub cover, and soil humidity, all of which were found to influence the population size of V. websteri. The population size showed a negative correlation with the amount of light. However, it showed positive correlations with organic matter, tree height, tree cover, shrub cover, and soil humidity. Furthermore, the path analysis model indicated a strong positive correlation between fruiting rate and individual height of V. websteri. Overall, these results suggest that high cover of tree and shrub layers can create an environment that suppresses the herbaceous layer, allowing adequate light penetration, sufficient soil humidity, and organic matter, which can promote both growth and fruiting rates of V. websteri.

To utilize textured vegetable protein (TVP) instead of meat in kimchi stew, TVP of different sizes were added to kimchi stew under different cooking conditions. Canned Kimchi stew was prepared by adding processed TVP. Physicochemical quality characteristics and antioxidant activities of the broth, kimchi, and meat (or TVP) were measured. The pH and salinity did not show a significant difference between treatment groups in the broth or kimchi. However, the TVP treatment group showed higher pH and lower salinity than the control group. There was no significant difference in color between control group and TVP-treated groups. In terms of texture, the control group had the lowest hardness, gumminess, and chewiness, followed by TVP-1 and TVP-2 manufactured after pre-cooking, which showed lower hardness, gumminess, and chewiness. The smaller the size of the TVP, the lower the hardness, gumminess, and chewiness. Results of shear force were consistent with those of hardness. Contents of flavonoid and polyphenol compounds as antioxidant components did not increase or decrease with the addition of TVP. There were no significant differences in antioxidant activities among experimental groups.

본 실험에서는 실험실 규모의 혈액투석 장치를 구성하고 국내 의료기기 제조업체에서 제작한 혈액투석기의 특성을 확인하였다. 혈액투석기 제조에 사용된 혈액투석막은 일반적으로 약 0.01 μm에서 0.2 μm의 기공을 갖는 Polyethersulfone (PES) 소재의 중공사막을 사용하였으며 중공사막의 외경은 약 270 μm, 내경은 약 200 μm이다. 혈액투석기의 하우징은 polycarbonate 소재를 사용하였으며 약 9,600개에서 12,000개의 중공사막을 탑재시켜 제작하였다. 탑재된 혈액투석막의 개수에 따라 각기 다른 막 표면적을 가지는 3종류의 혈액투석기를 사용하여 각 혈액투석기의 구조적강도와 수투과특성, 그리고 주요 요독물질 중 하나인 urea (요소)의 제거 실험을 진행하였다. 제거된 urea의 농도는 총유기탄소(total organic carbon, TOC) 분 석을 이용하여 분석하였으며 가장 높은 1.8 m2의 막 표면적을 가지는 혈액투석막의 urea 제거 성능은 약 1시간 만에 98.3% 를 달성하였다.

This study assessed dried vegetables derived from sweet potato petioles to promote the use of typically discarded aerial parts. The length (18.25 to 35.00 cm) and thickness (4.59 to 6.66 mm) of the petioles varied by variety, with ‘Hophungmi’ and ‘Tongchaeru’ showing promise for dried vegetable processing due to their longer and thicker petioles. In terms of color, ‘Hophungmi’ and ‘Shinmi’ exhibited high lightness, ‘Tongchaeru’ and ‘Hayangmi’ displayed strong redness, and ‘Pungwonmi’ had high yellowness. Rehydration rates and hardness increased over the harvest period, with ‘Pungwonmi’ and ‘Tongchaeru’ demonstrating excellent rehydration capacity. Additionally, ‘Hayangmi,’ ‘Shinmi,’ ‘Tongchaeru,’ and ‘Hophungmi’ maintained lower hardness levels, appealing to consumers who prefer a softer texture. Notably, the substantial polyphenol content (10.70 to 16.20 mg GAE/g) and flavonoid content (4.79 to 8.11 mg CE/g), along with antioxidant activity (DPPH: 1.11 to 2.14 mg, ABTS: 5.51 to 7.78 mg TE/g), indicate their potential as antioxidant-rich functional foods. This research supports the development of dried vegetable products tailored to consumer preferences.

To determine the differences in food quality between fish fed a low fish meal diet containing black soldier fly (Hermetia illucens) instead of fish meal and those fed a general fish meal diet, we analyzed the approximate components, mineral content, amino acid composition, fatty acid composition, color, and texture of Flounder (Paralichthys olivaceus). The analysis of approximate components showed no difference between the two samples, except for moisture content. Mineral contents were measured in the order of K, P, Na, and Mg in both samples, with no difference except for phosphorus (P). A total of 16 amino acids were detected in both samples, with no significant differences in their composition. Additionally, 17 types of free amino acids were identified, with no significant differences between the two samples. The fatty acid composition consisted of 13 fatty acids, with palmitic acid, DHA, and oleic acid being the most prominent, although slight differences in content were observed. The color and texture also showed no differences between the two samples. Overall, there were no significant differences in chemical components or physical characteristics, so it was judged to be insignificant in terms of food science.

본 연구에서는 중속 충돌하중을 받는 RC 벽체의 배면파쇄 영역을 모사할 수 있는 모델링 기법을 범용 유한요소해석 프로그램인 LS-DYNA을 통해 제안하였다. 충돌해석에 주로 사용되는 요소 삭제 기능이 발사체의 하중 전달에 영향을 미치고 이로 인해 배면파 쇄 영역이 과소평가 된다고 판단하였다. 따라서 충돌 위치 주변에는 요소 삭제 기능을 사용하지 않는 모델링 기법을 제안하였다. 제안 된 기법을 적용한 해석이 실험 결과를 근접하게 모사함에 따라, 제안한 기법이 연속적인 충돌에너지의 전달에 효과적임을 확인하였 다. 추가적으로 다른 충돌 조건에 대해 해당 기법의 적용성 검토를 진행한 결과, 대칭 조건을 사용하지 않고, 철근의 결속을 함께 모사 할 경우 RC 벽체의 파괴 거동을 더욱 근접하게 모사할 수 있음을 확인하였다.

This study analyzed the epilithic diatom community and ecological health of freshwater streams using environmental DNA (eDNA)-based metabarcoding technology. eDNA metabarcoding is a method that analyzes biological communities by performing PCR amplification followed by next-generation sequencing (NGS), offering higher sensitivity and faster results compared to traditional microscopic analyses. The study compared the eDNA metabarcoding results of ribulose bisphosphate carboxylase large chain gene (rbcL) targeting epilithic diatoms according to Taq polymerases (SuperFi II, GainBlue, EzPCR, and AccuPower). SuperFi II and GainBlue yielded the highest number of reads and zOTUs, with GainBlue showing particularly uniform read distribution, allowing for more accurate analysis for community diversity of epilithic diatoms. On the other hand, EzPCR and AccuPower exhibited lower number of reads and zOTUs, making them less suitable for the community diversity. In terms of community similarity analysis, SuperFi II and GainBlue produced highly similar results, while EzPCR and AccuPower showed significant differences. This study demonstrates that PCR Taq polymerases significantly influence community diversity and similarity analyses of epilithic diatoms, with GainBlue providing the most stable and accurate results. Our findings serve as a valuable foundation for improving the accuracy of eDNA-based metabarcoding analyses of diatoms.

The study examined the impact of adding acorn pomace dried powder (APDP) at different levels (0%, 5%, 10%, 15%, 20% w/w) on the quality, antioxidant potential, and consumer preference of garaetteok, a Korean rice cake. The findings showed that as the APDP content increased, moisture levels decreased, and pH levels were affected. Color analysis revealed a decrease in lightness (L), while yellowness (b) and redness (a) values increased. Texture analysis indicated an increase in gumminess, hardness, and chewiness, but a decrease in cohesiveness, adhesiveness, and springiness with higher APDP levels. Sensory evaluation of appearance, taste, flavor, texture, and overall preference identified the sample with 10% APDP as the most preferred. Additionally, the antioxidant activity of the garaetteok demonstrated a positive correlation with the increasing APDP content. In conclusion, the incorporation of 10% APDP enhanced the quality characteristics of garaetteok, improving its nutritional value, antioxidant properties, and overall consumer appeal.

The aim of this study was to evaluate the carbon storage capacity of broad-leaf forests in Republic of Korea through the analysis of studies related to carbon storage and carbon uptake, and to analyse the relationship between climatic factors affecting carbon storage capacity. We analysed the results of each previous study by summarising the research results of 55 previous studies collected through search, and organised the study area information and climate factors (elevation, average annual temperature, annual precipitation, etc.). And the carbon storage and net primary production of the above and below-ground and the whole plant were evaluated and the correlation with the climatic factors was statistically analysed. The analysis showed that the carbon storage of broad-leaved forests was positively correlated with altitude and negatively correlated with precipitation. These results mean that carbon accumulation in plants is more effective at higher altitudes with lower temperatures, and that broad-leaf forests are able to adapt and perform carbon storage functions in areas with low precipitation. Carbon uptake was negatively correlated with altitude and positively correlated with temperature. This means that the carbon absorption capacity of broad-leaved forests is greatly affected by temperature, and that the carbon absorption potential is greater in lowlands. Therefore, policies should be actively established to increase and preserve the carbon storage capacity of forests by considering the characteristics of the ecosystem functions of broadleaf forests and climate factors. The results of this study are expected to contribute to the understanding of the carbon cycle of broad-leaved forests and to the development of management measures, and to provide scientific data for carbon neutrality.

This study developed an unmanned autonomous moving algae collection device (HAMA-bot) to remove high-density algae concentrated in the waterfront of urban agricultural reservoirs, and analyzed the effect of algae removal after field application to medium-sized urban reservoir. The algae reduction effect (Chl-a) of the study site in the reservoir by the HAMA-bot operation showed an average 18.5% higher in the treatment area compared to the control area before operation, while the average reduction of 24% in the treatment area after operation. In addition, the Chl-a removal rate, which directly analyzed the influent and effluent of HAMA-bot, showed a very high level with an average of 96.9% (94.7~99.2%). Currently, it is optimized for urban reservoirs and manufactured on a small scale, but it is a useful tool that can be applied on a large scale to large dams and rivers, and it is considered that the field applicability would be improved with the optimized scale.

Alfalfa hay varieties have been developed and cultivated in Korea to enhance the self-sufficiency rate of domestic roughage. The objective of this study was to compare the effects of feeding domestic and imported alfalfa on the growth performance and economic feasibility of Hanwoo bulls. This study was conducted using eight Hanwoo bulls, aged 6 to 7 months, during their growing period. Hanwoo bulls were divided into two groups: one group fed imported alfalfa and the other group fed domestic alfalfa. Dry matter intake, weight gain, and blood metabolites were analyzed for two months of the growing stage. There was no significant difference between the two groups in dry matter intake and body weight. However, the price of domestic alfalfa is lower than that of imported alfalfa, so feeding domestic alfalfa is expected to have a positive effect on reducing production costs. Further study is needed to compare not only the growth performance but also carcass characteristics after slaughter by feeding domestic alfalfa to Hanwoo for a longer period during their growing stage.

Fish require movement for feeding, spawning, growth, and evading predators, making swimming ability a critical factor in their survival. Swimming speed in fish are generally classified into sustained, prolonged, and burst speed. This study assessed the swimming capabilities of native benthic freshwater fish and provided data to inform the design and construction of fishways. Three fish species were examined: Pseudobagrus fulvidraco (family Bagridae), Tridentiger brevispinis and Rhinogobius brunneus (family Gobiidae). Measurements of total length, standard length, body weight, and body height were collected for each species, and swimming ability was evaluated using a swimming tunnel apparatus. Swimming ability was determined by measuring burst speed to calculate the critical swimming speed (Ucrit) and the relative swimming speed (TL s-1). The mean critical swimming speeds were 0.73±0.15 m s-1 for P. fulvidraco, 0.75±0.1 m s-1 for T. brevispinis, and 1.34±0.12 m s-1 for R. brunneus. Additionally, a significant correlation was found between swimming ability and total length, indicating that swimming capabilities may vary based on body type and behavior. These findings contribute essential insights into the swimming abilities of native freshwater fish, offering valuable data for improving fishway design. Further research is suggested to evaluate the swimming capabilities of a broader range of freshwater fish species to enhance fishway efficiency.

본 연구는 수동식 감자 파종기구를 활용한 인력파종 및 트랙터 부착형 파종기를 활용한 기계파종을 비교하여 강원도 고랭지 지역의 여름감자 파종작업에 대한 작업효율 및 경제성을 분석하였다. 작업효율은 일정 면적을 파종하는 데 소요되는 시간으로 도출하였다. 동일한 작업효율을 가지는 조건에서 인력파종 및 기계파종의 연간 고정비와 연간 유동비를 산출하여 각 파종작업에 대한 경제성 분석을 수행하였다. 이때 고정비로는 감가상각비, 이자 및 수리비를, 유동비로는 인건비와 유류비를 고려하였다. 또한, 총비용 소요 분석을 통해 트랙터 부착형 파종기가 수동식 감자 파종기구 대비 경제성이 높아지는 시점을 도출하였다. 분석 결과, 기계파종이 인력파종 대비 약 4.6배 높은 작업효율을 보였으며 파종률은 두 방식에서 모두 100%로 나타났다. 경제성의 경우 구매 비용은 트랙터 부착형 파종기가 높았으나, 인건비 측면에서 비용 절감 효과를 보였다. 이에 따라 4년 9개월 이후부터 트랙터 부착형 파종기의 총 소요비용이 수동식 감자 파종기구의 총 소요비용 대비 낮아지는 것으로 나타났다. 따라서 장기적인 관점에서 기계파종이 인력파종 대비 생력화 효과가 크며 경제성도 높은 것으로 판단된다.

Tricholoma matsutake is a commercially valuable fungus that produces gourmet mushrooms. The artificial cultivation method that is currently used to produce fruiting bodies involves the transplantation of pine trees infected with T. matsutake from their natural habitats and the successful infection of young pine trees and mushroom production have been reported in Hongcheon. In this study, T. matsutake genetic diversity and relationships in this region were investigated. A genotype analysis was conducted on 25 fruiting bodies collected from an area approximately 2.56 km2 in size using 10 simple sequence repeat (SSR) markers. The analysis revealed 25 genotypes and 23 alleles with mean observed (HO) and expected (HE) heterozygosities of 0.312 and 0.293, respectively. The average polymorphism information content (PIC), which indicates marker polymorphism, was 0.257. A phylogenetic analysis showed no clear correlation between collection location and genetic distance; a spatial autocorrelation analysis indicated no significant genetic structure within 1600 m; and the Mantel test showed no significant correlation between genetic and geographic distances. These results were consistent with previous reports on Japanese populations. This study provides insights into the genetic diversity and structure of T. matsutake at a local scale and highlights the need for further studies across broader geographical ranges.

This study questions whether bilingualism in Korean multicultural education is constructed, perceived, and practiced as a discourse of ‘tolerance’. The purpose of this study is to examine the perceptions, practices, and implications of bilingual education by analyzing policy documents and field research texts related to multicultural language education. Five major discourses on migrants’ languages in Korea are identified: Korean language as the key for migrants to succeed; Korean language for migrants vs. English language for Koreans; migrants’ languages as a sign of problems and deficiencies; and migrants’ languages for global recognition of Korea. This paper argues that bilingualism in Korea works as tolerance because the discourses and practices of bilingual education, which seem to recognize diverse languages, in effect, discriminate against migrants’ languages, positioning migrant students and their languages as the objects of tolerance, and delimiting the boundaries of tolerance and intolerance. Further, bilingual education discourses depoliticize language discrimination and educational inequality that migrants face.

조영석(趙榮祏, 1686-1761)은 정선(鄭敾, 1676-1759)이 산수화에서 이룩한 예 술적 혁신을 ‘개벽(開闢)’이라고 평가하였다. 정선 이전에 우리나라 산수화의 주류는 중국의 화풍을 수용･변형시킨 것이었다. 정선 이전에도 실경산수화는 그려졌다. 그 러나 이 그림들은 실경감(實景感)이 부족했다. 1711년, 조선시대 회화에 일대 분수령 을 이룬 사건이 일어났는데 이것이 바로 정선의 금강산 여행이다. 그는 이 여행을 마 친 후 <<신묘년풍악도첩(辛卯年楓岳圖帖)>>을 그렸다. 정선이 그의 진경산수화를 통 해 이룩한 거대한 혁신은 무엇이었을까? 정선이 조선시대 산수화에 혁명적인 변화를 이룩할 수 있었던 것은 그가 창의적으로 미점(米點)을 금강산 그림 등 그의 진경산수 화 제작에 활용하였기 때문이다. 미점은 북송시대의 화가인 미불(米芾, 1051-1107) 과 그의 아들인 미우인(米友仁, 1086-1165)이 창안한 회화 기법이다. 미점이 사용된 산수화를 미법(米法)산수화라고 한다. 미점은 구름이 끼고 안개가 자욱한 자연의 습 윤한 모습을 묘사하는데 주로 쓰였다. 그런데 미법산수화는 실경산수화가 아니다. 상 상 속의 구름 낀 산을 그린 것이 미법산수화이다. 정선은 중국의 화가들과 달리 미점 을 실재하는 경치를 그리는데 사용하였다. 즉 그는 미점을 구름과 안개가 낀 산의 습 윤한 모습을 표현하는 데 쓰지 않고 실제 경치를 묘사하는데 사용함으로써 미법산수 화의 성격을 근본적으로 변화시켰다. <<신묘년풍악도첩>> 속 <단발령망금강산>을 보면 단발령을 묘사하는데 많은 미점이 사용되었다. 같은 화첩 속 <장안사>에는 옆으로 긴 점이 나무를 표현하는데 사용되었는데 이 점은 미점의 변형이다. 정선은 미점으로 조선의 산천을 그렸다. 결국 정선의 진경산수화는 ‘미점으로 그려낸 실경산수화’라고 할 수 있다. 조영석이 언급한 ‘개벽’은 정선이 그린 진경산수화의 가장 중요한 특징인 미점의 적극적이고 창의적인 사용에서 비롯되었다. <<신묘년풍악도첩>>은 1711년에 정선이 이룩한 회화 혁명이 무엇인지를 알려주고 있다.

This study examined the differences in the use of {ne} and {je} in Korean dramas from the 1990s and 2010s in terms of gender and discourse situations. The research focuses on how male and female characters use {ne} and {je} differently in public and private contexts for each era, and how these patterns have changed over time. The findings are summarized as follows. First, in the 1990s, men primarily used {je} in public settings and alternated between {ne} and {je} in private contexts, indicating a context-dependent usage pattern. Women, on the other hand, mainly used {je} in both public and private situations, but {ye} appeared more frequently in public settings, showing that women also adjusted their usage according to the context. Second, in the 2010s, men used both {ne} and {je} regardless of the discourse context, while women predominantly used {ne} across contexts. Third, compared to the 1990s, the use of {ne} in public situations increased for both men and women in the 2010s, indicating a notable change, while no change was observed in private settings.

This review examines the importance of measuring practical enteric methane emissions from ruminants, considering their significant impact on global warming. Global warming is significantly driven by an increase in greenhouse gases, with rising methane (CH4) emissions from ruminants accelerating global warming recently. To successfully mitigate CH4 emissions and establish effective strategies, it is essential to apply reliable measurement techniques. This will allow for an accurate assessment of on-farm CH4 emissions. The priority should be to gather CH4 emission data that reflects the actual state of CH4 emissions from ruminants. The review provides an overview of the methods used to measure CH4 emissions from ruminants by compiling existing researches. It introduces the concepts, principles, and limitations of these methods to facilitate comparisons between existing approaches. This review discusses methods for measuring enteric CH4 emissions from ruminants at the farm level, including the tracer technique, laser methane detector, GreenFeed, and sniffer system. These methods are highlighted as potential tools to accumulate substantial data on on-farm CH4 emission from domestic animals with provides examples of international cases. Among these, this review introduces the Sniffer method, a CH4 emission measurement techniques that are suitable for on-farm use under domestic conditions, and emphasizes the necessity of its application. In addition, by presenting international cases where predictive models were developed based on on-farm CH4 measurement techniques, it is projected that if predictive models for CH4 emissions are developed by accumulating data at the farm level, it can contribute to sustainable livestock industry in various promising ways.