• 한국토양비료학회지
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• 제51권2호
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• pp.101-110
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• 2018

There is an increasing concern over arsenic (As) contamination in rice since Codex Committee on Contaminants in Food (CCCF) discuss on maximum levels for As in rice in 2010. This study was conducted to reduce As concentration in rice by soil amendment treatments in paddy field soils contaminated by As. The selected four amendments were poultry manure, agri-lime, steel slag, and gypsum with the addition of 3% or 5% (w/w) on a dry basis. The As reduction effect could not be verified, as a result of the pot test by adding poultry manure to the paddy soil around the mine located in Yesan. Among the agri-lime treated rice cultivated pots, the As concentration increased up to 32.1%. On the other hand, the content of As in the sample pots treated with steel slag and gypsum decreased by 65.4% and 63.4%, respectively. On the basis of the results of these pot experiments, the field test was carried out in the As polluted rice field around the mine located in Yesan, and when the four amendments were treated, the As content in the brown rice reduced in all the amendment treatments compared with the control plot. The As reduction in brown rice of the amendment was confirmed to be higher efficiency by the order of gypsum > steel slag > poultry manure > agri-lime. As a result of pot experiments using paddy soil around the mine located in Seosan, As stabilization efficiency in rice and As reduction effect could not be determined by comparison to the control. From the rice cultivated from agri-lime treated pot, As concentration increased by 15.8% in rice. On the other hand, the As content of the pots treated with steel slag and gypsum decreased by 39.1% and 60.2%, respectively. In conclusion, distinguished As reducing effectiveness could be expected by soil amendment treatments for rice cultivation.

• 과학기술학연구
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• 제14권2호
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• pp.85-125
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• 2014

이 논문에서는 '수행되지 않은 사회과학(undone social science)'의 한 사례로 한국에서 합성생물학에 대한 사회과학적 연구의 부재를 지적하고 그 구조적 원인을 고찰해보고자 한다. 합성생물학은 자연에 존재하지 않는 생명물질을 만들어내고 새로운 생물체의 시스템을 설계하거나 자연에 있는 생명시스템의 재설계를 목표로 21세기 초 등장했다. 이 새로운 과학기술은 인류가 직면한 에너지, 식량, 질병 문제들을 해결해 줄 수 있을 것이라는 기대를 받고 있지만, 이전에 없던 합성생물체의 등장과 바이오 테러, 바이오 헤커 등으로 인류의 생존 자체가 위협받을 수 있다는 극단적인 우려도 낳고 있다. 따라서 이 분야를 주도하고 있는 미국과 유럽의 과학기술계는 초창기부터 사회과학자들의 관심과 참여를 중요하게 생각해서로 함께 연구할 수 있는 방법을 모색해왔다. 그런데 왜 한국에서는 합성생물학의 생명윤리, 생물안정성, 생물안보 등의 문제에 대한 연구가 거의 없을까? 만약 지금부터라도 사회과학자들의 참여를 독려한다면, 어떤 방식으로 하는 것이 좋을까? 이에 답하기 위해 인간유전체사업과 함께 도입되었던 ELSI(Ethical, Legal, and Social Implications) 연구의 성과와 논란을 살펴보고, ELSI의 한계를 극복하기 위해 등장한 post-ELSI의 다양한 방법론을 소개할 것이다. 이를 바탕으로 본 논문에서는 새로운 과학기술에 대한 ELSI 프로그램의 제도화가 시급하고, post-ELSI 논의의 활성화로 한국에 맞는 연구방법을 찾는 것이 필요하며, 사회과학자들의 자율성과 독립성을 확보할 수 있는 지적 공간과 제도적 장치를 마련해야 할 것이라는 세 가지 제언을 할 것이다.

• Journal of Nutrition and Health
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• 제48권3호
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• pp.277-288
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• 2015

본 연구는 서울 시내 복지관 두 곳을 방문하여 노인들을 대상으로 신체계측과 설문조사, 24시간회상법을 통한 영양섭취 상태를 조사하고 식사의 질을 평가하였다. 여자노인을 독거노인군 (LA군), 부부노인군 (LS군), 자녀동거 노인군 (LC군)으로 세 가지 가구 유형으로 나누어 조사하였다. 연구결과를 요약하면 다음과 같다. 1) 일반적인 특성에서 여자노인의 나이는 LA군이 75세로 가장 높았고 LS군이 70세로 가장 낮았다 (p < 0.001). WHR에서 LC군이 0.91로 0.89인 LA군과 LS군보다 유의하게 높았다 (p = 0.049). 월수입은 LS군이 185만원으로 가장 높았고 LA군이 67만원으로 가장 낮았다 (p < 0.001). 질병유병률에서는 여자노인 80% 정도가 1가지 이상의 질병을 가지고 있었으며, 심혈관계 질환 유병율이 가장 높았다. 2) 식생활과 생활습관면에서 가구유형별로 흡연, 음주, 운동유무, 영양제 섭취에 대한 유의한 차이는 없었다. 3) 1일 영양소 섭취량에서 열량, 식물성 단백질, 지질, 칼슘, 인, 칼륨, 셀레늄의 섭취량에서 가구 유형별 유의한 차이가 있었으며, 또한 비타민의 섭취량에서는 비타민 D, 비타민 E, 비타민 B군에서 유의한 차이가 있었으며 (p < 0.05), LA군의 섭취량이 LS군 또는 LC군에 비해 영양소의 섭취량이 가장 낮은 것으로 나타났다. 그러나 연령과 월 수입을 보정한 후에는 대부분의 영양소 섭취에 유의한 차이가 나타나지 않았으나, 칼슘, 비타민 D, $B_{12}$, 콜레스테롤의 섭취량은 세 군간에 유의한 차이가 나타났다 (p < 0.05). 영양질적지수(INQ)를 보면 칼슘, 비타민 D, 비타민 $B_2$에서 1 미만의 낮은 값을 나타내었다. 또한 비타민 $B_{12}$의 INQ 값은 연령과 월 수입을 보정한 후에도 세 군간 유의한 차이가 나타났다 (p < 0.05). 4) 에너지 섭취율을 비교한 결과 에너지필요추정량보다 적게 섭취한 대상자가 LA군이 가장 많았다 (p < 0.05). 탄수화물에서는 가구유형별에 따른 유의한 차이는 없었으나 에너지적정비율보다 높게 섭취하는 대상자 분율이 LA군에서 가장 높아서 탄수화물 의존도가 가장 높았다. 지질의 경우 LA군의 50%가 에너지적정비율에 못 미치는 양을 섭취하였고 단백질은 세군 모두 에너지적정비율만큼 섭취하였다. 5) 미량영양소 섭취 상태를 평균필요량과 충분섭취량을 기준으로 비교한 결과, LA군에서 비타민 $B_2$, 나이아신, 비타민 $B_6$, $B_{12}$의 평균필요량과 충분섭취량 미만 섭취 분율이 가장 높았고 LS군에서 가장 낮게 나타났다 (p < 0.05). 6) 여자노인의 1일 식품군별 섭취량을 비교한 결과, 과일류, 생선류, 해조류의 섭취량은 연령과 월 수입을 보정한 후에도 가구 유형별 유의한 차이가 나타났으며 (p < 0.05), 과일류는 LS군에서 해조류는 LA군에서 가장 많이 섭취하는 것으로 조사되었다. 7) 노인들의 식품군 점수를 평가한 KDDS를 살펴보면 여자 노인의 경우 다섯가지 주요 식품군이 모두 포함된 식사 (KDDS = 5)를 하는 대상자는 LS군이 가장 많았고, 3가지 이하의 식품군을 섭취하는 식사 (KDDS = 0~3)를 하는 여자 노인은 LC군과 LA군에서 많았다. (p = 0.048). 노인들의 식품군별 섭취패턴을 보면 우유 및 유제품 군을 부족하게 섭취하는 것으로 나타났다. 본 연구 결과 식품섭취는 가족 구성에 따라 영향을 받는 것으로 조사되었으며, 그러나 월 평균 수입도 여성 노인들의 식품 및 영양섭취에 많은 영향을 미치는 것으로 분석되었다. 독거노인이 부부노인과 자녀동거 노인에 비해 영양소 섭취율이 낮았고 식품군별 다양성 점수가 낮았다. 영양섭취의 취약계층인 독거노인을 위한 영양교육 및 영양지원을 통해 식습관 개선이 필요하다고 여겨진다.

• Ocean and Polar Research
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• 제34권4호
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• pp.365-384
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• 2012

Microalgae are photosynthetic microorganisms that are highly productive in the presence of basic renewable natural sources (light, $CO_2$, water and nutrients). They can synthesize lipids, carbohydrates and proteins in a small number of days. Subsequently, these carbon-captured products can be processed into both biofuels and valuable co-products. Additionally, microalgae would be an ideal feedstock for replacing land-based food crops with cellular products as high energy density transportation fuels. These microscopic organisms could contribute a significant amount of renewable energy on a global scale. In Korea, microalgae biofuel research was common in the early 1990s. The research activities were unfortunately stopped due to limited governmental funds and low petroleum prices. Interest in algal biofuels in Korea has been growing recently due to an increased concern over oil prices, energy security, greenhouse gas emissions, and the potential for other biofuel feedstock to compete for limited agricultural resources. The high productivity of microalgae suggests that much of the Korean transportation fuel requirements can be met by biofuels at a production cost competitive with the increasing cost of petroleum seen in early 2008. At this time, the development of microlalgal biomass production technology remains in its infancy. This study reviewed microalgae culture systems and biomass production, harvesting, oil extraction, conversion, and technoeconomical bottlenecks. Many technical and economic barriers to using microalgal biofuels need to be overcome before mass production of microalgal-derived fuel substitutes is possible. However, serious efforts to overcome these barriers could become a large-scale commercial reality. Overall, this study provides a brief overview of the past few decades of global microalgal research.

• 농업과학연구
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• 제38권2호
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• pp.369-381
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• 2011

Ginseng in Korea has not only the big production value but also till a good reputation from overseas in the name of 'Korea Ginseng'. Having spread rapidly nationwide from 2000 year, its production keeps on increasing but its consumption becomes lazy and its price is also falling down because of comsumer's concern about mainly overusing pesticide for ginseng. In order to cope with this problem, the government introduced the GAP certification system to ginseng in 2006 to reflect consumer's needs for food safety. This system will be a good opportunity to promote ginseng consumption dramatically. In this aspect it is very important to know how well this system is established and how ginseng farmers build marketing strategies to draw new wind in the market. This study was carried out to look over the GAP certified ginseng system and show its marketing strategies using 4P's(product, place, promotion and price). The main results are as follows. GAP ginseng system currently has some weaknesses such as lack of systematic certification management and after-service, nonrealistic certification fee and poor linkage from production to consumption. In the marketing mix strategies, product strategy suggests that the most desirable appearance be transplanted ginseng filled with branch roots and 4 to 5 year-ginseng, and it is necessary to choose multi-brand strategy divided for present into for self-sufficiency and family brand strategy by use if its brand enlarges to processed products in the future. In the place strategy, 3 stages like 'producer group' - 'GAP certified facility' - 'sales shop' are based as the physical marketing channel according to traceability, and connected with giant retail market and environment friendly stand, and if its sales volume enlarges, it should be considered the GAP ginseng specialized marketplace which is a type of chain store. In the promotion strategy, the promotion of government level is necessary at first and producer alliances require the promotion targeting at the group of women under 40 with differentiation from price, quality, and safety. In the price strategy, the early stage-high price strategy which sets 20~25% higher for self-sufficiency and 30~35% for present is desirable.

• KSBB Journal
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• 제15권3호
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• pp.299-306
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• 2000

발광미생물 (luminescent bacteria)인 P. phosphoreum을 이용한 수계의 환경독성물질로 지정된 ethane, benzene, phenol류에 chlorine이 치환된 l47~의 독성강도를 생체발광의 50%저하시키 는 독성농도인 ECso값을 통한 생물학적 정량을 하였을 때 phenol) benzene) ethane 의 순서로 독성깅도가 높게 산출되 어졌으며, 특히 지환된 chlo괴ne의 수가 증가할수록 독성강도가 강하다는 것을 알 수 있었다. 또한 산출된 ECso값을 이용허여 독성물질들의 물려화학적 parameter특성인 octan이(water 분할계 수 (log P), 용해도 (log S) 및 solvatochromic parameter의 떤관쟁 을 QSAR 모탤링하였으며 실힘을 통하지 않고, 독성의 독성강도 를 예측할 수 있는 회기식을 다음과 같이 산출하였다. $log EC_{50} =2.48 + 0.914 log S(n=9 R2=85.5% RE=0.378) log EC_{50}=0.35 - 4.48 Vi/100 + 2.84 \pi^* +9.46{\beta}m-4.48am (n =14 R2=98.2% RE=0.012) log EC_{50} =2.64 -1.66 log P(n=5, R2=98.8% RE=0.16) log EC_{50}=3.44 -1.09 log P(n=9 R2= 80.8% Re=0.207)$. QSAR 모델은 QSAR 검증식을 통하여 확인된 다중회기식을 이용함으로 실험하지 않은 독성물 질이 갖는 물리화학적인 특성을 대입하여 log Eeso값을 예측할 수 있으므로 경제적, 시간적으로 이익을 얻을 수 있는 모델이다.

• Biomolecules & Therapeutics
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• 제25권5호
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• pp.545-552
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• 2017

Increasing concern is being given to the association between risk of cancer and exposure to low-dose bisphenol A (BPA), especially in young-aged population. In this study, we investigated the effects of repeated oral treatment of low to high dose BPA in juvenile Sprague-Dawley rats. Exposing juvenile rats to BPA (0, 0.5, 5, 50, and 250 mg/kg oral gavage) from post-natal day 9 for 90 days resulted in higher food intakes and increased body weights in biphasic dose-effect relationship. Male mammary glands were atrophied at high dose, which coincided with sexual pre-maturation of females. Notably, proliferative changes with altered cell foci and focal inflammation were observed around bile ducts in the liver of all BPA-dosed groups in males, which achieved statistical significance from 0.5 mg/kg (ANOVA, Dunnett's test, p<0.05). Toxicokinetic analysis revealed that systemic exposure to BPA was greater at early age (e.g., 210-fold in $C_{max}$, and 26-fold in AUC at 50 mg/kg in male on day 1 over day 90) and in females (e.g., 4-fold in $C_{max}$ and 1.6-fold in AUC at 50 mg/kg vs. male on day 1), which might have stemmed from either age- or gender-dependent differences in metabolic capacity. These results may serve as evidence for the association between risk of cancer and exposure to low-dose BPA, especially in young children, as well as for varying toxicity of xenobiotics in different age and gender groups.

• 유통과학연구
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• 제13권2호
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• pp.95-104
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• 2015

Purpose - This is a comparative study of the market development and characteristics of Ulsan in South Korea, Fukuoka in Japan, and Yanji in China, which are major East Sea Rim cities with adjacent areas of similar natural characteristics of the sea and the country. Particularly, it considers these aspects while focusing on the evolution of networks that appear in the distribution system and at the same time examining the institutions of market activation and regulations that are handled by the central and the local government and the changing logistics due to the development of transportation and the concern of food safety, using a meso-analysis approach. Research design, data, and methodology - The study used a historical and comparative approach with a focus on case studies. It made use of various materials such as local newspaper articles, reports, literature, interviews with experts, discussions with local merchants, discussions with customers, and so forth. Results - In the case of Fukuoka, from the 1960s, due to the entry of supermarkets, supermarkets expanded and they have now come to a dominant market position in the current market. They offer a convenient and comfortable environment while providing a large mall offering a variety of educational and cultural activities for customers to meet the customers' needs, such as the preferences of Korean tourists, who appear to prefer Japanese foods. The Fukuoka City Central Wholesale Market has been exporting fruits and vegetables as well as seafood products to Korea, China, and so forth. In the case of Ulsan, as in the early 2000s, due to the expansion of supermarkets, the traditional markets have been shrinking and further, the modernization of traditional markets was conducted under the auspices of the Small Business Administration. In addition to the large discount malls, the expansion of SSM is expected to further drive the small trader bay. Shopping malls, department stores, and traditional markets contend with each other in Yanji, China, but a large number of citizens appear to prefer traditional markets and imported milk in the supermarket after the melamine scandal in China. Recently, the WanYuan (萬源) wholesale market has been partially completed and made an attempt to become a logistics hub in Northeast Asia. Conclusions - For the development of Korea's retail industry, it is important to offer the government with proposals regarding desired regulation. On the other hand, in order to enable the business of traditional markets, it requires an association for cultural tourism. At present, it would be better to provide a venture fund for the youth rather than infrastructure support. This study emphasizes the importance of institutions and policy to develop networks in the East Sea Rim. Future studies should conduct a survey on customers, managers, and merchants more carefully and systematically to understand the market situation while considering the size of the city and its evolution of markets, as well as policies and institutions.

• The Plant Pathology Journal
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• 제36권4호
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• pp.305-313
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• 2020

Host shifting and host expansion of fungal plant pathogens increases the rate of emergence of new pathogens and the incidence of disease in various crops, which threaten global food security. Magnaporthe species cause serious disease in rice, namely rice blast disease, as well as in many alternative hosts, including wheat, barley, and millet. A severe outbreak of wheat blast due to Magnaporthe oryzae occurred recently in Bangladesh, after the fungus was introduced from South America, causing great loss of yield. This outbreak of wheat blast is of growing concern, because it might spread to adjacent wheat-producing areas. Therefore, it is important to understand the host range and population structure of M. oryzae and related species for determining the evolutionary relationships among Magnaporthe species and for managing blast disease in the field. Here, we collected isolates of M. oryzae and related species from various Poaceae species, including crops and weeds surrounding rice fields, in Korea and determined their phylogenetic relationships and host species specificity. Internal transcribed spacer-mediated phylogenetic analysis revealed that M. oryzae and related species are classified into four groups primarily including isolates from rice, crabgrass, millet and tall fescue. Based on pathogenicity assays, M. oryzae and related species can infect different Poaceae hosts and move among hosts, suggesting the potential for host shifting and host expansion in nature. These results provide important information on the diversification of M. oryzae and related species with a broad range of Poaceae as hosts in crop fields.

• 미생물학회지
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• 제48권1호
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• pp.22-28
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• 2012

장염비브리오는 우리나라에서 하절기에 발생하는 식중독의 주요 원인균으로 주로 해수 및 어패류를 통해 인체에 감염된다. 최근 지구 온난화로 해수의 온도가 상승하면서 해양환경 중 세균들의 분포도가 증가하고 또 다양한 항생제에 대한 내성을 보이는 병원균들이 확산되고 있어 국민보건 및 수산양식 등의 분야에 큰 문제로 대두되고 있다. 이에 본 연구에서는 경기, 인천지역 7곳에서 해수 및 어패류 시료를 채취하여 장염비브리오균의 분포도를 모니터링하고 이들의 항생제 내성 양상을 분석하였다. 총 966건의 시료를 $CHROMagar^{TM}$ 및 TCBS 평판배지와 multiplex PCR기법으로 동정했을 때 전체 해수 시료의 61.9%, 어패류 시료의 41.8% 등 총 47.7%의 시료에서 장염비브리오균이 검출되었다. 이들 분리균주들의 항생제 내성을 13종의 항생제에 대해 분석한 결과 97.3%와 87.3%가 각각 vancomycin과 ampicillin에 대해 내성을 보였고 cephalothin (48.8%)과 rifampin (46.1%)에 대한 내성비율도 기타 다른 항생제들에 비해 상대적으로 높은 것으로 나타났다. 분리균주들의 항생제 감수성은 chloramphenicol (91.7%)과 trimethoprim-sulfamethoxazole (91.8%)에 대해 가장 높았고, gentamycin (82.3%), tobramycin (74.8%), nalidixic acid (71.6%), tetracyclin (69.4%), cefotaxime (63.0%) 등의 순서로 감수성 비율이 높았다. 분리균주들의 약 69%가 vancomycin과 ampicillin을 포함하여 3개 이상의 항생제에 대해 다중내성을 보였고 특히 11개 항생제에 대해 내성을 보이는 균주도 2개 검색되었다. 항생제 내성 장염비브리오 분리균주들의 플라스미드 프로파일을 분석한 결과 55.1%가 플라스미드를 보유하고 있었으며, 이들은 총 24가지 유형으로 분류되었으나 플라스미드 프로파일과 항생제 내성 간의 뚜렷한 상관관계는 관찰되지 않았다.