Swine influenza is a respiratory infectious disease in pigs caused by Orthomyxoviridae influenza virus A. As a multihost pathogen, the virus can infect humans, birds, and pigs and has pandemic potential due to rapid mutation rate. This study investigated the seroprevalence of influenza A antibodies in pigs in Chungbuk Province to overview its temporal and spatial distribution. From March to November 2021, blood samples collected for swine fever and foot-and-mouth disease antibody tests from swine farms located in Cheongju, Jincheon, Jeungpyeong, and Goesan within the jurisdiction of the Chungbuk Animal Health Laboratory were used. Blood samples from both sows and growing pigs were collected. Additionally, three farms participating in the Expendable Disease Guidance Support Project were chosen to investigate the seroprevalence status by parity of sows and age of piglets. A total of 468 sows and 1,519 growing-finishing pigs were employed in this study. The results showed that Jincheon had the highest seropositivity rate, suggesting that more effort should be made in biosecurity to prevent mechanical transmission, given the close proximity of farms. The analysis of antibody levels in farms targeted by the Expendable Disease Guidance Support Project could suggest that once the virus enters a farm, it spreads throughout the entire pig population regardless of age. Farms that were positive in the first half of the year remained positive in 86% of cases in the second half, suggesting continuous infection within the farm unless depopulation or all-in-all-out practices are implemented. Moreover, 67% of farms that were negative in the first half remained negative in the second half, and farms managed by the same person showed identical antibody change patterns, indicating that the swine influenza virus can be transmitted by humans or vehicles. The results highlight the need for further analysis of biosecurity systems and geographical risk factors.

Surface water temperature of a bay (from the south to the north) increases in spring and summer, but decreases in autumn and winter. Due to shallow water depth, freshwater outflow, and weak current, the water temperature in the central to northern part of the bay is greatly affected by the land coast and air temperature, with large fluctuations. Water temperature variations are large in the north-east coast of the bay, but small in the south-west coast. The difference between water temperature and air temperature is greater in winter and in the south-central part of the bay than that in the north to the eastern coast of the bay where sea dykes are located. As the bay goes from south to north, the range of water temperature fluctuation and the phase show increases. When fresh water is released from the sea dike, the surrounding water temperature decreases and then rises, or rises and then falls. The first mode of empirical orthogonal function (EOF) represents seasonal variation of water temperature. The second mode represents the variability of water temperature gradient in east-west and north-south directions of the bay. In the first mode, the maximum and the minimum are shown in autumn and summer, respectively, consistent with seasonal distribution of surface water temperature variance. In the second mode, phases of the coast of Seosan~Boryeong and the east coast of Anmyeon Island are opposite to each other, bordering the center of the deep bay. Periodic fluctuation of the first mode time coefficient dominates in the one-day and half-day cycle. Its daily fluctuation pattern is similar to air temperature variation. Sea conditions and topographical characteristics excluding air temperature are factors contributing to the variation of the second mode time coefficient.

This study aimed to investigate the need for dietary education and programs for young Koreans belonging to singleperson households in the metropolitan area. A total of 500 young adults aged 19-34 participated in the study through an online survey. Participants responded to questions on general characteristics, dietary problems, and the need for dietary education and programs. The subjects were divided into three groups as follows: Undergraduate students, employed workers, and others. Among the subjects from single-person households, 20.2, 67, and 12.8% were undergraduate students, employed workers, and others, respectively. When asked for their estimation of an appropriate self-pay when participating in a cooking class, 39.8% of total subjects responded ‘5,000-10,000 won’. The most preferred program for young adults in single-person households was the ‘support food package’. For the preferred method of dietary education, undergraduate students showed a greater preference for classes ‘at campuses’. However, employed workers and others had a higher preference for ‘non-face-to-face online classes’. Undergraduate students tended to generally have a higher preference for dietary education and support programs compared to employed workers and others. This study provides data that will be useful for establishing healthy dietary policies and education programs for young single-person households in Korea.

Swine atrophic rhinitis is a respiratory disease that causes nasal turbinate loss and septal deformation due to Bordetella bronchiseptica and Pasteurella multocida. Turbinate loss facilitates pathogens to infect lungs, which leads to various respiratory diseases and productivity reduction. In this study, descriptive analysis was implemented for atrophic rhinitis and pneumonia. From 6 pig farms shipped to slaughterhouses in Chungbuk province, 20 heads and 20 lungs were collected by each farm from March 2020 to September 2020. Their atrophic rhinitis lesions and lung lesions were scored and blood samples were also collected to test the seroprevalence of several respiratory diseases. Pasteurella multocida from nasal swab was cultured and antibiotic resistance tests were performed. Correlation between atrophic rhinitis scores and lung lesion scores was not found. Abdominal nasal lesions were more severe than dorsal lesions. Differences in lung lesion scores were relatively small between lobes. The score of pneumonia was higher in castrated pigs than in female pigs. There was no relationship between lesion score and seroprevalence of respiratory diseases. Antibiotic resistance levels for Pasteurella multocida differed by farm, and several antibiotics were not effective. The results of this study imply that antimicrobial susceptibility tests are highly recommended before administration.

This study sought to investigate the association between the food literacy (FL) of children and mothers, and the maternal feeding style. Study subjects were mothers (n=400) with children in the 4th to 6th grades of elementary school and who were the primary caregivers for their children (n=400). The responses to the Caregiver’s Feeding Styles Questionnaire (CFSQ) were obtained from mothers. Both mothers and children completed the questionnaire for socio-demographics, dietary habits, health status, and food literacy. The high demanding/high responsive feeding style was associated with increased meal frequency for both mothers and children. The low demanding/low responsive feeding style was significantly associated with a lower mother’s FL after accounting for confounding factors. The low demanding feeding styles were associated with the child’s lower FL after adjustments for the age, sex, weight status of the child and the age, household income, and education of the mother. However, this association was not seen after making an additional adjustment for the mother’s FL. These results suggest that the caregiver’s feeding style may affect the dietary habits and FL of both mother and child.

This study was conducted to examine the status of food consumption and nutrition intake of young adults according to food security using data from the Korea National Health and Nutrition Examination Survey (KNHANES) (2008~2018). A total of 10,655 young adults aged 19~34 years participated in the study. The subjects in the moderately/severely food insecure group consumed less fruits, vegetables, meat, nuts and seeds than those in food secure/mildly food insecure group after adjusting for confounding factors. The moderately/severely food insecure group significantly decreased mean adequacy ratio (MAR) and nutrient adequacy ratio (NAR) for protein, vitamin A, riboflavin, niacin, vitamin C, calcium, phosphorus and iron compared to the food secure/ mildly food insecure group. The percentages of the participants consuming a daily diet with carbohydrate, protein, vitamin A, thiamin, riboflavin, niacin, vitamin C, phosphorus and iron less than the estimated average requirement (EAR) increased in the moderately/severely food insecure group compared with the food secure group. This study suggested that the nutrition intake of young adults was related to food security status. These findings can be used as basic data for developing nutritional policies for young adults.

담양습지는 하도 내에 발달하는 하천습지로, 국내 처음으로 습지보호구역으로 지정되었으며 유네스코 무등산권 세계지질공원 후보지역으로 알려져 있다. 담양습지 인근은 영산강 상류지역으로 현재는 비교적 넓은 평야지대가 분포한다. 담양습지 주변의 퇴적환경을 해석하고자 시추코어를 획득하였고, 퇴적상, 연대측정(AMS, OSL), 입도분석, 지화학 분석 등을 수행했다. 또한 습지 주변의 기존 시추 코어 자료를 사용하여 종합적인 퇴적환경 변화를 해석했다. 담양습지가 분포하는 영산강 상류 일대의 평야 지역은 후기 플라이스토세 동안 형성된 하안단구 퇴적층이 비교적 하도와 먼 지역에 분포하고 있다. 홀로세 퇴적층은 자갈층이 평야 일대에 걸쳐 넓게 분포하고 있어 홀로세 중기 이후 해수면이 안정화 된 다음에 망상하천의 형태로 퇴적된 것으로 해석했다. 그리고 현재와 같은 사행하천으로 전이되면서 주로 모래가 우세한 퇴적물이 유입되었으며, 하도 주변으로는 범람원 환경이 조성되었다. 또한 화분분석 결과를 근거로 약 6천년 전 후에는 온난 습윤한 환경이었으며 이후 습지 퇴적층이 발달한 것으로 추정했다. 담양습지가 분포하는 하도 일대의 트렌치 조사 결과 하부에는 원마도가 좋은 자갈층이 분포하고 있으며, 자갈층 상부를 모래층이 덮고 있다. 담양습지는 1970년대 담양호가 건설된 이후 모래층 상부에 머드층이 퇴적되면서 형성된 것으로 추정된다.

Upo Wetland is the largest riverine wetland in Korea which has been inscribed on the Ramsar List of Wetlands of International Importance in 1998. In this study, sedimentological study was carried out in order to understand the environmental changes in Upo Wetland during the Holocene. The drilling work for recovering the Quaternary sediments was conducted on the inner part (UPW17-01, UPW17-02, and UPW17-03) and the outer part (UPL17-01, UPL17-02) of the Upo Wetland. The recovered sediments are commonly characterized by gravel-dominated deposits in the lower part and silty clay-dominated deposits in the middle to upper parts respectively, which are seemed to be changed from fluvial to palustrine/lacustrine environments around 4,000 cal yr BP. In order to establish the Holocene diatoms distribution from Upo Wetland, we identified 63 diatom taxa. Of these, 14 species were new records for Korea: Gomphonema consector, Gomphonema jadwigiae, Hantzschia abundans, Luticola pseudomurrayi, Luticola spauldingiae, Neidium suboblongum, Ninastrelnikovia gibbosa, Oricymba rhynchocephala, Pinnularia borealis var. lanceolata, Pinnularia latarea, Pinnularia paliobducta, Pinnularia saprophila, Sellaphora laevissima, Stauroneis pseudoschimanskii. All identified diatom species are illustrated by high-quality scanning electron microscopic and light microscopic microphotographs. The ecological habitat for all taxa are presented.

We report on stretchable electrochromic films of poly(3-hexylthiophene) (P3HT) fabricated on silver nanowire (AgNW) electrodes. AgNWs electrodes are prepared on polydimethylsiloxane (PDMS) substrates using a spray coater for stretchable electrochromic applications. On top of the AgNW electrode, poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is introduced to ensure a stable resistance over the electrode under broad strain range by effectively suppressing the protrusion of AgNWs from PDMS. This bilayer electrode exhibits a high performance as a stretchable substrate in terms of sheet resistance increment by a factor of 1.6, tensile strain change to 40%, and stretching cycles to 100 cycles. Furthermore, P3HT film spin-coated on the bilayer electrode shows a stable electrochromic coloration within an applied voltage, with a color contrast of 28.6%, response time of 4-5 sec, and a coloration efficiency of 91.0 cm2/C. These findings indicate that AgNWs/PEDOT:PSS bilayer on PDMS substrate electrode is highly suitable for transparent and stretchable electrochromic devices.

In this study, the behavior of dominant microbial communities was investigated in the treatment of porcine carcasses using an anaerobic high temperature burial composting method. The correlation between odor emission and bacterial community structure was analyzed through principal component analysis and extended local similarity analysis. In the burial layer of porcine carcass, the dominant bacteria were Bacillaceae (46%), Thermoactinomycetaceae (15%) and Lactobacillaceae (4%) in the early stage and Bacillaceae (46%), Thermoactinomycetaceae (15%), Lactobacillaceae (4%) in the end. Clostridiaceae (CH3SH), Bacillacea ((CH3)2S2), Clostridium ((CH3)2S2), Clostridial (H2S), Oceanobacillus (H2S), and Thermoanaerobacteraceae (H2S) were closely related to the sulfurous odorants, which are the highest odor contributions. The emission of sulfurous odor substances such as H2S, CH3SH, (CH3)2S, and (CH3)2S2 showed a positive correlation with each other, but showed a negative correlation with nitrogenous odorants (NH3 and TMA), aldehydes, organic acids, and VOCs. The results of this correlation analysis can provide useful information that enables us to understand the characteristics of microbial communities and odor generation during the degradation of carcasses and to manage odors and burial sites in the treatment of carcass.

It is very important to treat infected livestock carcasses safely and quickly. In this study, the degradation characteristics and odor generation characteristics of carcasses were investigated during the treatment of swine carcasses using the anaerobic burial composting method. While the carcasses were decomposed, the temperature remained high, at 40~55°C on average, and most of the carcasses were decomposed rapidly. The major odorcontributing substances in the buried composting method are sulfuric odor substances such as H2S, CH3SH, dimethyl sulfide (DMS) and dimethyl disulfide (DMDS), and the odor contribution of these substances is 93~99%. Among them, CH3SH, which accounts for about 56~89% of odor contribution, was the most representative indicator substance. Despite the anaerobic digestion process, the methane concentration in the digestion process was as low as 0.5~0.8% at the burial point of the carcass. The odor and methane produced during the decomposition of the carcasses decreased considerably during the discharge to the surface layer through the buried layer consisting of compost. These results suggest that anaerobic high temperature burial composting is one of the most useful methods to treat carcasses of infected livestock.

The objective of the current study was to compare the execution of hygiene and safety management according to the characteristics of children’s food service stations, with the ultimate objective of providing sanitary and safe food service to children. To this end, the study conducted surveys of 73 public and private pre-schools with fewer than 100 children in district A from July 30 to October 31 2015. The differences were evaluated by t-test and analysis of variance. The confidence and validity of the results were analyzed by six food ingredient and facilities management questions, three personal hygiene and facilities management questions, four environmental management questions, and five storage and treatment management questions; for a total of 18 questions. The cumulative distribution of the four factors was 61.569%, and the Cronbach’s alpha was 0.821, which indicated that the results were reliable. The results revealed that public pre-schools (a) and home-based pre-schools (b) had different levels of food ingredient and facility management, but no differences in the number of cooks, number of children served, type of food distribution, and the existence of mass food service facilities. The results of the study may be used to develop hygiene and safety management manual and educational contents to promote the health of the children served.

The current study was conducted to facilitate appropriate hygiene and safety management in children’s food service stations, with the ultimate objective of providing sanitary and safe food service to children. In order to develop questionnaire items, literature review was conducted, in addition to detailed interview of working-level personnel at a children’s food service management support center. This resulted in a total of thirty questions on personal hygiene management, food materials hygiene management, and facilities hygiene management. Using the questionnaire, seventy-one food service stations for children in District A in Seoul that serve less than one hundred children were surveyed to analyze the reliability, construct validity, and correlation in the developed measurement tool. The developed measurement tool consisted of ten task and environmental hygiene management questions, five personal and cooking hygiene management questions, four food ingredient and storage hygiene management questions, and four food service operation and management question; with a total of twenty-three questions, in four factors stated above. The cumulative distribution of the four factors was 54.698%, and Cronbach’s α value was 0.672~0.853, which indicated that the study was reliable. The results of the analysis indicated that each of the factors were correlated, the study was satisfactory, and the tool was valid for evaluating hygiene and safety management practices in children’s food service stations. Finally, in order to enhance practical utility of the developed measurement tool, the significance and limitations were described.

This study compared recipes of Korean Traditional steamed dishes, Noodles, Rice cake & Confectionary in Choi’s Recipe (「Choi’s Eumsikbeop」) with those in other literatures written during the mid-Joseon Dynasty. Through this work, it aimed to explore the value of Choi’s Recipe (「Choi’s Eumsikbeop」) in the history of cooking and the meanings of its recipes. Choi’s Recipe (「Choi’s Eumsikbeop」) contains recipes for a total of 20 kinds of food. Specifically, there are seven kinds of Fermented dishes (kimchi (6), and salted fermented food (1)), four kinds of Steamed dishes, seven kinds of Confectionary and Sweet (rice cake (4), jeonggwa (1), and dang (2)), and two kinds of Noodles (dumpling (1), and noodle (1)). Among them, the steamed dishes revealed characteristics of 17th-century food as in other cooking books, and some of them utilized unique ingredients handed down only through head families. Moreover, some recipes showed different cooking methods using similar materials. This suggests the originality of the recipes in this cooking book.

In this study, enhanced cation exchange capacity of polystyrene (PS) electrospun fibers by electron beam irradiation was investigated. PS spinning solutions were prepared by dissolving 25 wt% PS in 75 wt% mixed solvents (dimethylacetamide (DMAc)/tetrahydrofuran (THF)) at the ratio of 33/67% v/v with divinylbenzene (DVB; 0, 1, 2 phr)　as crosslink agent. The PS electrospun fibers were carried out at doses of 0 (control), 100 and 200 kGy. The ion exchange capacity (IEC) of PS electrospun fibers depend on the DVB concentration and irradiation dose. The PS electrospun fiber with DVB 1 phr at dose of 150 kGy showed the maximum IEC of 4.670 mmol/g.

Pelargonium zonate spot virus (PZSV)는 group IV (+) ssRNA viruses, Bromoviridae에 속하는 식물 병원체로, 일반적으로 토마토, 국화, 아티초크 및 제라늄에 감염된다. 본 연구는 검역 현장에서 PZSV를 신속하고 특이적으로 진단 할 수 있는 PCR module을 개발하는 것을 목적으로 하였다. PZSV를 검출하기 위한 RT-PCR 프라이머 선발 결과, 각각 513 및 320 bp를 증폭하는2개 조합을 선발하으며, 더욱 높은 검출감도로 검출할 수 있을 뿐아니라 RT-PCR을 검증할 수 있는 nested PCR 프라이머 조합을 개발하였다. 또한, 제한효소 Xho I 부위를 삽입한 유전자변형-양성대조구 플라스미드를 설계하여, PCR module에서 대조구로부터 오염을 검증할 수 있도록 개발하였다. 본 연구에서 개발한 PCR module은 토마토, 국화, 아티초크 및 제라늄 등에서 PZSV를 간편, 신속 및 특이적으로 검출하여, 지속적으로 식물검역에 활용할 수 있을 것으로 기대된다.

This study was conducted to examine the physicochemical properties and consumer acceptability of commercial Gangjeong. The samples used in this study were nine different Gang-jeong as commercial products. To accomplish this research, the physicochemical properties of nine samples, including moisture, crude lipid, sugar contents, acid value, color values, and texture, were measured. In addition, consumer panels evaluated the overall acceptability, appearance, flavor, sweetness, and texture of samples using a 9-point Likert type scale as well as the perceived intensities of sweetness and rancid odor by a 9-point Just-About-Right (JAR) scale. All data were statistically analyzed using One-way ANOVA, Principle Component Analysis, Hierarchical Cluster Analysis, and Pearson's Correlation Analysis. All physicochemical properties were significantly different among the samples (p<0.001). Analyses of consumer acceptability and JAR ratings of the nine samples showed significant differences (p<0.001).