• Environmental Analysis Health and Toxicology
• /
• 제18권4호
• /
• pp.311-322
• /
• 2003

This study was carried out to investigate the 106 kinds of pesticide residues in agricultural products (n=3,614) by GC, for the northern area of Seoul from March (1999) to December (2000). The detection rate of pesticide residues in samples was 5.0% (mean =2.86$\pm$7.22 mg/kg, n=180). The order of the agricultural products in which pesticide residues were detected was korean lettuce > perilla leaf, pepper > chinese cabbage > leek > spinach. The percentage of the agricultural products in excess of MRL was 2.0% (n=73). The agricultural products in excess of MRL were korean lettuce (n=15), perilla leaf(n=13), leek (n=6), spinach (n=6), pepper (n=5), chwinamul (n=5), etc. The order of the pesticide residues which were detected in agricultural products was procymidone endosulfan chlorpyrifos vinclozolin chlorothalonil and diazinon. The average residual values of procymidone, endosulfan, chlorpyrifos, vinclozolin, chlorpyrifos, and diazinon were 4.07, 1.24, 1.27, 2.83, 17.71 and 1.48 respectively. The pesticide residues in excess of MRL were chlorpyrifos (n=19), endosulfan (n=12), procymidone(n=), vinclozolin (n=6), etc, and the measured concentration ranges of chlorpyrifos, endosulfan, procymidone, vinclozolin, pyrazophos, diazinon and EPN were 0.03-6.72, 0.18-5.8, 2.0-60.8, 1.70-20.33, 0.26-1.21. 0.59-4.3 and 0.28-4.19 respectively.

• 한국환경농학회지
• /
• 제40권2호
• /
• pp.118-126
• /
• 2021

BACKGROUND: It is very important to monitor the residual characteristics of pesticides in pre-harvest fresh ginseng to ensure consumer safety. METHODS AND RESULTS: Forty-eight fresh ginseng samples were collected from 8 ginseng-growing fields 10 days before harvest and pesticide residues in fresh ginseng with and without rhizome (head of ginseng) and rhizome were analyzed for 320 pesticides by using GC-MS/MS and LC-MS/MS. As a result of the pesticide residue analysis, the number of pesticides detected from the fresh ginseng with rhizome, that without rhizome and rhizome were 26, 25, and 40, respectively, indicating that high number of pesticides found in rhizome, compared with the other parts. Pyraclostrobin was detected with the highest frequency in all samples, reaching to 21.2% in fresh ginseng with rhizome, 16.8% in that without rhizome, and 14.8% in rhizome. CONCLUSION: The residue levels of pesticides detected did not exceed their maximum residue limits, in spite of residual data in fresh ginseng before harvest. The amounts of the estimated daily intakes of all the detected pesticides were found to be from 0.018 to 1.818% of their acceptable daily intakes, indicating that concentrations of pesticides detected from fresh ginseng with and without rhizome collected before harvest do not pose the immediate health risks.

• Journal of the Korean Wood Science and Technology
• /
• 제30권1호
• /
• pp.72-78
• /
• 2002

본 연구에서는 검은 비늘버섯을 유용한 식용버섯으로 개발하기 위하여 톱밥 및 다양한 농산부산물을 기질로 하여 버섯재배를 실시하였으며, 기질의 혼합비가 버섯재배 및 생산량에 미치는 영향을 구명하고자 하였다. 톱밥을 이용한 버섯재배에서 수종별로는 미루나무가 795 g으로서 가장 많은 버섯이 생산되었으며, 아까시나무가 중간정도, 상수리나무가 3수종 가운데 가장 적은 양이 생산되었다. 3수종의 톱밥을 30% 및 50% 비율로 혼합한 배지에서 아까시나무톱밥의 혼합으로 많은 버섯 생산을 결과하였는데, 아까시나무톱밥 70%+미류나무톱밥 30%가 265 g의 버섯을, 아까시나무톱밥 50%+미류나무톱밥 50% 조합에서는 228 g의 높은 버섯생산량을 나타냈는데 대하여, 상수리나무톱밥이 혼합되면 버섯생산량이 낮아졌다. 이러한 결과로부터 톱밥 혼합 배지에서 아까시나무는 부재료로서 매우 가치가 있는 것으로 나타났다. 모든 농산부산물의 경우에도 버섯의 증수효과를 결과하였다. 이러한 결과로부터 검은비늘버섯의 재배에 톱밥, 특히 아까시나무 및 농산부산물을 이용할 수 있음이 밝혀졌다.

• 유통과학연구
• /
• 제14권10호
• /
• pp.109-116
• /
• 2016

Purpose - This study investigates the purchase pattern relating to soybean products in Korea. Specifically, the effect of branding based on a regional name was analyzed in terms of consumer purchase frequencies. The primary purpose of this study is to understand why family characteristics affect product selection for a regional brand in the soybean food category. Research design, data, and methodology - We used data collected by the Rural Development Administration (RDA) of Korea. The RDA has monitored agricultural food consumers for years in order to obtain purchase records. Panel participants live in regions near the capital city of Seoul, Korea. Examining data from January 2010 to May 2016, 667 families were selected for analysis. The final data set was 1,335,402. Each purchase item by each individual family was aggregated to a countable weekly observation. To analyze the data set quantitatively, zero-inflation regression was adopted, which was appropriate to avoid biases from overly dispersed observations. Results - We hypothesized the effects of regional branding from the viewpoint of the family characteristics. The first hypothesis was that the number of children would be positively associated with the purchase of a regional brand of soybean products. The result strongly supported this hypothesis. The second hypothesis was that the number of family members would be negatively associated with the purchase of the soybean products of a regional brand. Based on empirical analysis, we concluded that this hypothesis was partially supported. The third hypothesis was the presence of an interaction effect between the number of children and the family size, which was supported by the results. As a supplementary analysis, we also tested mean-variance differences in terms of categories and regional branding with corporate branding. Conclusion - The results of this study provide insights for regional branding strategies in agricultural food management. This study appears to be one of the seminal studies trying to analyze purchase patterns from longitudinal observations. In addition, this study adopted variables characterizing family lifestyle. This study confirmed that children and family size should be considered when soybean product brands are introduced.

• 한국식품영양학회지
• /
• 제32권4호
• /
• pp.335-341
• /
• 2019

Beta-carotene is the most prominent member of the group of carotenoids, natural colorants that occur in the human diet. Beta-carotene is also an effective source of vitamin A in both conventional foods and vitamin supplements, and it's generally safe. In this study, we explored the beta-carotene contents in agricultural products widely and specifically grown in Korea. The beta-carotene contents were ranging from 223 to $27,908{\mu}g/100g$ in leaves, and 0 to $7,588{\mu}g/100g$ in vegetables. In leaves and vegetables, the amount of beta-carotene was the highest in green tea powder ($27,908{\mu}g/100g$), followed by pepper ($7,588{\mu}g/100g$). In fruits, the beta-carotene content was found to range from $0{\mu}g/1,011g$ to maximum of $293.66{\mu}g/100g$(plumcot). However, there beta-carotene was not detected in strawberry. In the case of cereals and specialty crops, the beta-carotene contents were $326{\mu}g/100g$ for non-glutinous rice, $313{\mu}g/100g$ for glutinous rice, $57{\mu}g/100g$ for amaranth and $15{\mu}g/100g$ for pine nut, respectively. However, the beta-carotene content was not detected in other samples. This study revealed the presence of beta-carotene content in agricultural products specifically grown in Korea for nutritional information and food composition database.

• 한국지역사회생활과학회지
• /
• 제20권3호
• /
• pp.397-411
• /
• 2009

The use of local product foods and fresh-cut products, the dietitian's recognition, the required items and the quality for school foodservice was investigated to increase the consumption of high-quality agricultural products. Data from 578 elementary schools, 228 middle schools and 116 high schools were collected by school foodservice personnels in each regional Education Administration in Gyeong-gi province. The first criteria of buying food materials was reliability/safety for all school foodservice. The second criteria were the origin of the product and freshness/ripeness for elementary and middle schools and high school, respectively. The most important consideration for selecting a supplier was the quality of the material. The appearance/status of the food was the first factor for buying food materials. The origin and the seasonality were very important for buying farm products. Dietitians in Gyeong-gi province recognized the local products, and used them weekly. The advantages of using local products were the quick supply, freshness and safety. On the other hand, the disadvantages were the lack of information and the uncertainty of supply. Sixty eight percent of the subjects had experienced the high-quality agricultural products in school meals, but the frequency was low. The main reasons for not servicing high-quality agricultural products were the high cost and the lack of trust on the quality. Among fresh-cut products, seasonings and root vegetables were purchased most frequently, but leaf vegetables was 5.7% only. The purchase of fresh-cut products was not frequent, but usually satisfied. The advantages of fresh-cut products were the reduced workload and waste, but the reason for not using them were poor hygiene and the high price. The diverse supply system and the promotion of the local product foods would be necessary since the most food materials were purchased through suppliers. In addition, the problems related to the high cost and distrust should be resolved to expand the consumption of the high-quality agricultural products and the fresh-cut vegetables. The institutions for certifying the quality should be needed to increase the confidence of these products.

• 한국정보통신학회논문지
• /
• 제10권8호
• /
• pp.1366-1372
• /
• 2006

농산물에 대한 수입이 개방된 이후 대량의 값싼 외국 농산물들은 점점 국내 농산물 시장의 점유율을 높이고 있으며, 이러한 과정에서 수입 시 사용된 방부제와 기타 유해 물질들의 검출 문제도 발생하고 있다. 국내 농가들은 시장 경쟁력을 높이기 위하여 국가의 체계적인 지원과 이를 뒷받침하는 시스템 도입을 요구하고 있다. 이에 본 논문에서는 소비자에게 실시간으로 농산물의 생산 및 관리 정보를 제공하기 위한 모니터링 시스템을 설계하였다. 실시간 모니터링을 위하여 기존의 CCTV(Closed-Circuit Television)와 같은 아날로그 카메라가 아니라, 장소에 구별 없이 네트워크가 가능한 곳에서 CCTV보다 좋은 화질의 영상을 제공하는 웹 카메라를 사용하여 시스템을 구현하였다. 본 실시간 모니터링 시스템의 특징은 여러 웹 카메라 영상을 다중 화면으로 구성한 멀티비전 인터페이스와 농산물을 효율적으로 관리하기 위한 영상 저장 기능 및 정해진 시간에 따라 영상 저장이 이루어지는 스케줄링 녹화가 가능하다.

• Journal of the Korean Wood Science and Technology
• /
• 제47권5호
• /
• pp.597-606
• /
• 2019

Cellulose nanocrystals (CNCs) were successfully isolated from oil palm fronds (OPFs) using different concentrations of ammonium persulfate (APS), and their characteristics were analyzed by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, and thermogravimetric analysis (TGA). APS oxidation effectively isolated CNCs with rod-like morphology in nanometer scale. The dimensions of the CNCs decreased with increasing APS concentration. FTIR and XRD analyses revealed that all the CNCs showed crystals in the form of cellulose I without crystal transformation occurring during APS treatment. The relative crystallinity of the CNCs increased with increasing APS concentration, whereas their thermal stability decreased. An APS concentration of 2 M was found to be optimal for isolating the CNCs.

• 한국식품위생안전성학회지
• /
• 제39권2호
• /
• pp.109-117
• /
• 2024

본 연구에서는 경기도 내 유통 중인 간편조리세트 55건 내 농·축·수산물 원재료의 미생물 오염도를 조사하였다. 55건의 간편조리세트 중 농산물이 원재료로 들어가는 제품은 48건, 축산물이 원재료로 들어가는 제품은 43건, 수산물이 원재료로 들어가는 제품은 16건이었다. 농·축·수산물에서 일반세균은 100%의 검출률을 보였으며, 일반세균 평균 검출량은 농산물 6.57 log CFU/g, 축산물 4.60 log CFU/g, 수산물 5.47 log CFU/g으로 나타났다. 농·축·수산물에서 대장균군은 각각 81.25%, 69.77%, 43.75%의 검출률을 보였고, 대장균군 평균 검출량은 농산물 2.83 log CFU/g, 축산물 1.34 log CFU/g, 수산물 1.12 log CFU/g으로 나타났다. 대장균은 13건(30.23%)의 축산물에서 0.70-2.36 log CFU/g 범위로 검출된 반면, 수산물에서는 1건(6.25%)만 검출되었고, 농산물에서는 검출되지 않았다. 농·축·수산물에서 진균은 각각 97.92%, 93.02%, 93.75%의 검출률을 보였고, 진균 평균 검출량은 농산물 3.82 log CFU/g, 축산물 2.92 log CFU/g, 수산물 2.82 log CFU/g으로 나타났다. 농·축·수산물에서 식중독균은 각각 35.42%, 37.21%, 31.25%의 분리율을 보였고, 바실루스 세레우스, 살모넬라균 등 7종의 45개 식중독균을 분리하였다. 간편조리세트로 인한 식중독 사고 예방을 위하여 세척, 충분한 가열 섭취 및 조리과정 중 교차오염에 대한 주의가 필요하다.

• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
• /
• pp.967-976
• /
• 1996

Straw and other fibrous by-products are inevitably produced during cereal production and have traditionally been used for many purposes including feeding animals . The potential of these by -products as a feed resource for ruminants is being increasingly appreciated (FAO , 1977). In the future, the amount of cereals fed to farm animals will have to be reduced and livestock will have to rely more on by-products such as straw. The method of animal production can be classified by the major portion of feed. One is animal forage and the other is grains. In Korea , livestock farmers normally depend more than 70% upon grains for the feed stuff. The livestock production system causes the unbalance of nutrition, and results in low productivity of animal farming. In many livestock farms in Korea the rice straw is using as a major forage and the amount of rice straw fed takes 46% of total amount of required forages. Especially the rice straw is mainly using during spring, fall and winte season. However, there are still lots of problems to solved such as harvesting cost, transportation between rice farm ad livestock farm, and quality loss during drying and storage . Therefore the mechanization of straw harvesting is urgently needed to use the renewable agricultural by-products and to overcome the shortage of animal forage. The objective of this research is to develope a straw harvester with new concept which can solve the problems of the quality loss and the labor cost during drying in a field, collecting , and storage. The developed straw harvester is self-propelled machine rebuilt by rice combine and equipped with the pick-up device, the macerater and the mat-forming device.