• 생물환경조절학회지
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• 제16권3호
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• pp.247-251
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• 2007

신선 엽채류인 시금치의 수확 후 포장, 저장유통온도별 품질보존 및 상품성에 미치는 영향을 조사하였다. 저장 중 중량의 변화에서 포장 후 저장 시는 중량감소가 거의 없었으나, 무포장은 저장기간이 길어질수록 그리고 저장온도가 높을수록 감소율이 현저하였다. 비타민 C함량은 저장 초기에 감소가 컸으며, 저장온도가 낮을수록 감소가 적었고, 비닐포장 간에는 큰 차이가 없었다. 시금치에서 Hunter's value는 저장온도가 높을수록 b값이 높아지는 경향이었다. 시금치 저장 중 외관 신선도에서 polypropylene 비닐포장 후 저온$(1{\sim}3^{\circ}C)$ 저장은 최고 34일, 상온$(10{\sim}15^{\circ}C)$ 저장은 8일까지 상품성이 유지되었으나, 무포장 상온보관은 3일 밖에 유지되지 않았다.

• 생물환경조절학회지
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• 제16권3호
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• pp.252-257
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• 2007

전남 서남부지역의 참다래 과수원에서 발생하는 과숙썩음병원균(fruit rot, Botryosphaeria dothidea)에 대한 항균작용이 우수한 세균성 균주를 선발하기 위하여 참다래 과수원 토양으로부터 단일균주를 분리하였으며, 과숙썩음병원균(Botryosphaeria dothidea)에 대한 생물적 제어 능력을 검정하고 균주 동정을 실시하였다. 참다래 과수원에서 분리한 총 250여종의 단일균주 중에서 참다래에서 발생하는 과숙척음병원균에 대하여 길항작용이 우수한 균주를 1차적으로 6종 선발하였고, 이 중에서 참다래 과숙썩음병원균에 대하여 길항 작용이 96.0% 정도로 우수한 Strain #120을 최종적으로 선발하였다. 길항균 #120의 포자배열은 rectiflexibles 하였고, 포자표면은 smooth형이었으며, 분리균 세포벽내 LL-type이 DAP를 갖는 wall chemotype I 이었다. 길항균 #120의 균주 형태학적 특성, 생리 생화학적 그리고 화학 분류학적 특성 등을 종합하여 볼 때 길항균 #120은 Streptomyces sp. #120으로 동정되었다.

• 동아시아식생활학회지
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• 제19권2호
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• pp.202-209
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• 2009

This study was conducted to gather the basic data on the spread of the domestic kiwifruits, and the development of the manufactured goods and the health functional foods produced using kiwifruits. We determined the chemical compositions of four types of kiwifruits cultivated in Korea, Daeheung, Bidan, Haegeum and Hayward. In addition, we measured the anti-microbial activities and cytotoxicities of these types of kiwifruits. The vitamin C contents of the kiwifruits increased in the order of Bidan (93.82 mg/100 g), Daeheung (85.89 mg/100 g), Haegeum (83.73 mg/100 g) and Hayward (75.28 mg/100 g). The total amino acids contents per 100 g of kiwifruit (dry weight basis) were 483.97 mg (Haegeum), 453.08 mg (Hayward), 437.27 mg (Bidan) and 369.35 mg (Daeheung). The K and Ca contents of the kiwifruits ranged from 14.56~37.12 mg/L and 1.94~8.24 mg/L, respectively; however, the Fe, Mg, Zn and Cr contents all less than 1.83 mg/L. The antimicrobial activities of methanol extracts of kiwifruits against five gram positive bacteria at concentration of 2,000 mg/L in terms of inhibition diameter ranged from 8.8~12.8mm, while raged from 9.2~13.1mm against three gram negative strains of bacteria. The hyperplasia inhibition of lung cancer cells (Calus-6) by 800 mg/L kiwifruits extracts of Bidan, Haegeum, Daeheung and Hayward kiwifruits were 21.2%, 9.5%, 6.7% and 5.0%, respectively. Consequently, it was assumed that kiwifruits was rich in vitamin C, amino acids and K, and that they would therefore be useful in processed goods.

• 한국지역사회생활과학회지
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• 제21권1호
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• pp.139-148
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• 2010

This study was conducted to restore our traditional Cheongtaejeon tea and to develop the special products. We inoculated Cheongtaejeon tea with lactobacilli (Lactobacillus plantarum CHO 25) and the mixed microbial strains (L. plantarum CHO 25 + Saccharomyces cerevisiae + Bacillus amyloliquefaciens CHO 104). We also examined the sensuous characteristics and physiological activity of Cheongtaejeon tea which was produced by the inoculation of microbial strains. The external appearance of Cheongtaejeon teas were not significant among the teas which were produced with or without the inoculation of L. plantarum CHO 25 and the mixed microbial strains. The taste of the tea increased most in Cheongtaejeon tea which was produced without the inoculation of microbial strains. The taste and liking of Cheongtaejeon tea which was inoculated with Aspergillus oryzae and Aspergillus niger decreased significantly, and it was not suitable to drink. Total phenolics compound contents, total flavonoid contents and DPPH ($\alpha,\alpha$-diphenyl-$\beta$-picryl-hydrazyl) radical scavenging activity of Cheongtaejeon tea extracts increased much more in the order of that produced with the inoculation of L. plantarum CHO 25, control and that with the mixed microbial strains. However, nitrite radical scavenging activity in 1,000 mg/L Cheongtaejeon tea hot water extracts were in the order of the control (94.4%), the inoculation of L. plantarum CHO 25 (93.6%) and the mixed microbial strains (91.1%). Overall results indicated that the sensuous characteristics increased most in Cheongtaejeon tea which was produced without the inoculation of microbial strains, and those physiological activities in tea with the inoculation of L. plantarum CHO 25.

• 한국지역사회생활과학회지
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• 제20권2호
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• pp.181-191
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• 2009

This study was conducted to examine the distribution status, the physicochemical composition, and the physiological activity of Spergularia marina grown in the western region in Jeon-Ra-Nam-Do, looking for its potential as a local specialty goods. The amount sold of Spergularia marina to different areas from a rural market place was examined during April, 2008. The proportions of Spergularia marina are as follows; Yeongam(30.5%), Muan(24.3%), Naju(20.3%), Hampyeong(18.0%), and Haenam(7.0%), which were shown higher than those of Pimpinella brachycarpa. Total vitamin C and total chlorophyll contents in Spergularia marina were 68.61mg/100g DW and 58.11mg/g DW, respectively. Total amino acid contents were 331.94mg/100g DW and 20 kinds of amino acids were separated and classified. The contents of inorganic matters in Spergularia marina were as follows; Na(64.23mg/L), Mg(15.88mg/L) K(9.99mg/L), Ca(3.83mg/L). The total phenol and the total flavonoid contents of methanol extracts from Spergularia marina were 41.7mg/L and 18.9mg/L, respectively, with an extracting concentration of 2,000mg/L. The nitrite scavenging activity was highest (83.4%) in hot water extract. These results may be useful as basic data for using Spergularia marina as a local specialty goods.

• 대한한의학방제학회지
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• 제19권2호
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• pp.109-118
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• 2011

Objectives : The Lycoris squamigera Maxim has been used traditionally for treatment of various diseases. However, the studies on the effect of Lycoris squamigera Maxim have not been carried out. In the present study, extract of Lycoris squamigera Maxim were tested for their anti-inflammatory and anti-oxidation effect. Methods : The anti-inflammatory effect of the various solvent extract was studied in lipopolysaccharide (lps)-treated mouse macrophage cells. RAW 264.7 cells were pre-incubated with Lycoris squamigera Maxim extracts for 4h and treated with $1\;{\mu}g/m{\ell}$ lps for 18h, and then the anti-inflammatory effects of extracts were determined. The anti-oxidation effect of extracts measured by DPPH method, reductive potential test, total phenolics test. Results : Extracted root's ethyl acetate layer showed a significant decrease in nitric oxide. And that layer (root's ethyl acetate extract) was showed decrease in TNF-${\alpha}$ concentration dependently. Separated from Root's ethyl acetate extract was fraction 1 has $0.1{\sim}5\;{\mu}M$ range, fraction 2 has $0.1{\sim}10\;{\mu}M$ range did not showed cytotoxicity. Anti-oxidation result as DPPH test showed the best was root ethyl acetate extract. Redusing power was made a comparison between fractions and standard. They were showed similar value. Fraction's total phenol containing result was better then standard. Conclusions : These results suggest that these extracts can be used as anti-inflammatory, anti-axidation materials.

• 생물환경조절학회지
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• 제15권1호
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• pp.84-90
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• 2006

This study was conducted to anticipate nitrate reduction state in tree through measurement of nitrate reductase activity (NRA) and investigate the effect of nitrogen concentrations (100, 200, 400, and 600 $mg\;L^{-1}$) on growth, the nitrogen content of various tissue, and NRA of pear (Pyrus pyrifolia cv. Niitaka) seedlings in sand culture. Nutrient solutions used in this experiment were adjusted to pH 6.5 and fixed the ratio of ammonium and nitrate to 1:3 and trickle-irrigated 3 times a day. Tree height and dry weight of various organs in seedlings were higher in low nitrogen concentration (100 and 200 $mg\;L^{-1}$) than in high nitrogen concentration (400 and 600 $mg\;L^{-1}$). The shoot growth in 600 $mg\;L^{-1}$ was extremely poor by nitrogen over supply. Increasing the nitrogen concentration, the concentration of nitrate-N in leaves and roots were insignificantly changed but that of stems increased. The accumulation of total and reduced nitrogen in all organs with increasing concentrations of nitrogen supply were increased at 30 days after treatment but those of all organs at 60 and 90 days after treatment were highest in 600 $mg\;L^{-1}$, whereas there were no significant changes among other nitrogen concentration. The in vivo (${+NO_3}^-$) NRA of all organs did not relate to nitrogen concentration but the in vivo (${-NO_3}^-$) NRA of leaves except roots increased with increasing the nitrogen concentration. Therefore, the proper nitrogen concentration to promote growth and nitrate reduction of pear tree was 200 $mg\;L^{-1}$.

• 한국지역사회생활과학회지
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• 제20권4호
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• pp.549-558
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• 2009

This study examined the basic information on the native pear c.v. 'Baekwoon' grown in Mt. Baekwoonsan, Gwangyang, to develop as a local specialty product. the sensory characteristics, chemical compositions, and physiological activities of 'Baekwoon' pear were examined and compared with those of 'Niitaka' pear. Hardness of 'Baekwoon' pear was 19.30N, which was higher than 'Niitaka'. The sugar content of 'Baekwoon' was 11.5 $^{\circ}Brix$, which was lower than 'Niitaka'. The total amino acid contents of the fruit skin and flesh of 'Baekwoon' were 222 mg/100g dry weight (DW) and 130 mg/100g DW, respectively, which were much higher than those of 'Niitaka'. Especially, serine contents in fruit skin and flesh of 'Baekwoon' were 75.4 mg/100g DW and 40.2 mg/100g DW, respectively, which were significantly (p<0.05) higher than those of 'Niitaka'. However, physiological activities, such as total phenol content, DPPH radical scavenging activity, total flavonoid content and nitrite scavenging activity, of 'Baekwoon' were lower than or similar to those of 'Niitaka'. Consequently, vitamin and amino acid contents of 'Baekwoon' were better than those of 'Niitaka'. It is suggested to use fruit skin because of its good composition and physiological activities so that it helps to improve the quality and the biological activity.

• 화훼연구
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• 제19권3호
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• pp.158-163
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• 2011

플라워샵의 활성화에 대한 기초 자료 확보 측면에서 소비자 남성 58명과 여성 155명을 대상으로 플라워샵 상품의 가격, 포장, 선물용 및 판매자의 태도에 대한 만족도와 재구매 의사에 대해 조사를 하였다. 플라워샵의 상품에 대한 만족도에 대해 '만족한다'는 응답은 남성과 여성 각각 8.62% 및 14.21%를 나타냈다. 그리고 꽃 상품의 포장에 대해 '만족한다'는 응답은 남성과 여성 각각 6.88% 및 12.91%를 나타냈다. 꽃상품에 대해 선물로서 '만족한다'는 응답은 남성과 여성 각각 8.61% 및 1.95%를 나타냈다. 플라워샵의 상품 판매자의 태도에 '만족한다'는 응답은 남성과 여성 각각 6.89% 및 6.46%를 나타냈으며, 플라워샵 상품의 재구매 의사가 있다고 응답은 남성과 여성은 각각 5.16% 및 9.05%에 불과하였다. 이와 같이 플라워샵에 대한 소비자들의 만족도가 낮게 나타난 만큼 플라워샵 경영주의 적극적인 대처가 필요할 것으로 사료된다.

• Journal of Veterinary Science
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• 제23권3호
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• pp.36.1-36.14
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• 2022

Background: Since 2003, the H5 highly pathogenic avian influenza (HPAI) subtype has caused massive economic losses in the poultry industry in South Korea. The role of inland water bodies in avian influenza (AI) outbreaks has not been investigated. Identifying water bodies that facilitate risk pathways leading to the incursion of the HPAI virus (HPAIV) into poultry farms is essential for implementing specific precautionary measures to prevent viral transmission. Objectives: This matched case-control study (1:4) examined whether inland waters were associated with a higher risk of AI outbreaks in the neighboring poultry farms. Methods: Rivers, irrigation canals, lakes, and ponds were considered inland water bodies. The cases and controls were chosen based on the matching criteria. The nearest possible farms located within a radius of 3 km of the case farms were chosen as the control farms. The poultry farms were selected randomly, and two HPAI epidemics (H5N8 [2014-2016] and H5N6 [2016-2017]) were studied. Conditional logistic regression analysis was applied. Results: Statistical analysis revealed that inland waters near poultry farms were significant risk factors for AI outbreaks. The study speculated that freely wandering wild waterfowl and small animals contaminate areas surrounding poultry farms. Conclusions: Pet birds and animals raised alongside poultry birds on farm premises may wander easily to nearby waters, potentially increasing the risk of AI infection in poultry farms. Mechanical transmission of the AI virus occurs when poultry farm workers or visitors come into contact with infected water bodies or their surroundings. To prevent AI outbreaks in the future, poultry farms should adopt strict precautions to avoid contact with nearby water bodies and their surroundings.