• Journal of Nutrition and Health
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• 제31권1호
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• pp.80-87
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• 1998

Intestinal microflora in 17 breast-fed(BF) and 14 formula-fed (FF) newborn infants at about 1 week after birth were investigated to determine the floral differences of the two lactation groups. The fecal conditions were significantly different between the two groups in that the number of subjects who showed watery feces, and the times of defecation per day, were higher in the BF group. In addition, the mean fecal PH of the BF group was lower than that of the FF group. The dominant species in the BF groups which showed the highest count among the species of microflora was bifidobacteria , while the dominant species in the FF group was streptococci. The frequency of staphylococci and the count of bifidobacteria were significantly higher in the BF group. However, the frquencies of streptococci and Peptococcaceae were higher in the FF group. Through the differences were not significant, the frequency of bvifidobacteria and the count of staphylococci were higher in BF group, whereas the frequencies of bacteriodes, clostridia, enterobacter and the count of clostridia were higher in FF group.

• 한국양봉학회지
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• 제34권3호
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• pp.189-195
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• 2019

본 연구는 아까시나무 꽃으로부터 발산되는 휘발성 성분을 SPME법으로 추출하여 GC/MS를 통해 분석을 시도하여, 서로 다른 수종 별로 발산하는 FVCs의 성분과 그 구성비율이 확연하게 차이가 있음을 알 수 있었다. 아까시나무, 4배체 아까시나무, 분홍아까시나무에서 FVCs 분석결과를 비교해 볼 때 차이를 보이는 주요 FVCs는 각각 Linalool (35.47%), α-Farnesene (33.94%), (E)-4,8-Dimethylnona-1,3,7-triene (37.23%)으로 나타났으며, 공통적으로 (Z)-β-ocimene이 30% 이상을 차지하고 있음을 확인하였다. 이에 따라 수종 간 FVCs 조성비의 차이가 꿀벌의 방화 행동 유도에 중요한 역할을 할 것으로 추측되며, 아까시나무의 FVCs에 대한 꿀벌의 선호도 및 방화 행동의 연관성에 대해 심층적인 연구가 수행되어야 할 것으로 보인다.

• 한국환경과학회지
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• 제16권5호
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• pp.549-559
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• 2007

Vegetation surveys were performed at 45 plots along 10 highways cut slopes in South Korea. Total floral inventory, species richness and exotic plant percentage were obtained within each plot. Life history and life form of each species appeared were analyzed. Community types were classified using hierarchical cluster analysis and detrended correspondence analysis and non-metric multidimensional scaling were conducted from vegetation matrix. 292 species of vascular plants were discovered and the number of natives and exotics were 226 and 66, respectively. There were no significant differences of species richness and exotic plant percentage between cut slopes and rest areas. Hierarchical cluster analysis indicated five clear vegetation associations in cut slopes and rest areas. Detrended correspondence analysis indicated that species composition of total and native plants were similar along the highway cut slopes whereas exotic plants were distributed differentially along the highway cut slopes. in non-metric multidimensional scaling, the studied sites were more separated from each other on the basis of their species composition than the results of detrended correspondence analysis with respect to total, native and exotic plants. The both ordination represented that exotic plants have not been made uniform yet on cut slopes and rest areas by highway corridor in spite of diverse chronosequences after highway construction termination (1 to 22 years). This study showed that the distribution of species composition in exotic plants was different and localized on cut slopes and rest areas of highway in this representative peninsula area of North East Asia and the invasion of exotic plants can retard the process of plant species homogenization.

• 한국식품영양과학회지
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• 제36권12호
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• pp.1617-1621
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• 2007

전주지역에서 김장시기에 수거한 김치의 미생물 조성과 관능성적간의 상관성을 조사하여 다음의 결과를 얻었다. 김치는 21 표본 중 11 표본에서 L. mesenteroides가 $8.31{\sim}11.27log\;CFU/g$의 범위에서 지배균으로, 16 표본에서 L. sakei가 $7.97{\sim}10.57log\;CFU/g$의 범위에서 차지배균으로 나타났다. 김치의 관능성적은 총균수, 지배균수, 차지배균수, 균종수 등 계량적 특성에는 유의적 상관성이 없었다. 가장 맛이 좋은 김치 3종은 모두 지배균이 L. mesenteroides, 차지배균은 L. sakei인데 비해 가장 맛이 없는 김치 3종은 지배균에 L. sakei가 많아 김치의 맛은 주요 미생물의 균종의 조합과 관련이 있었다. 효모는 8표본에서 $3.80{\sim}4.6log\;CFU/g$의 범위로 검출되었으며 모두 Saccharomyces servazzii로 동정되었다. 곰팡이는 전혀 검출되지 않았다. 효모 균수와 김치의 관능성적은 유의적 상관성이 없었다.

• 한국양봉학회지
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• 제32권3호
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• pp.139-146
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• 2017

식물의 향기성분에 대한 프로파일은 기본적으로 추출법의 효율성에 기반한다. 본 연구에 사용된 SPME 방식은 한 개체의 식물로부터 반복적인 시료의 채취가 가능하고, 사용하는 fiber의 종류에 따라 극성과 비극성 성분 모두 가질 수 있기 때문에 사용범위가 넓고 재현성이 강하다. 본 연구는 아까시나무 꽃으로부터 발산되는 휘발성 성분을 SPME법으로 추출하여 GC/MS를 통해 분석을 시도하였다. 선행연구에서 관찰한 결과(Aronne et al., 2014; Xie et al., 2006) 아까시나무 꽃의 향기성분은 대다수 terpenoids와 benzenoids 화합물로 밝혀졌다. Pinene, (Z)-${\beta}$-ocimene, linalool, benzaldehyde가 대표적인 아까시나무 꽃의 주요 향기성분으로 검출되었다. 또한 ${\beta}$-myrcene, limonene, farnesene, methyl benzonate, indole, methyl anthranilate, phenylethyl alcohol 등은 아까시나무 꽃 특유의 강한 향을 구성하는데 중요한 휘발성분으로 생각된다. 또한 본 연구는 개화의 단계별로 발산하는 향기성분과 그 구성비율이 확연하게 차이가 있음을 알 수 있었다. 이러한 결과를 통해 꽃이 생합성 하는 향기성분의 조성은 정적인 비율로 구성하는 것이 아니라 꽃잎의 발달과 함께 동적인 비율로 구성한다는 것을 알게 되었다. 앞으로 아까시나무 꽃의 향기성분 생산에 미치는 환경적인 요인, 향기성분 발산의 주기성, 꽃의 노화와 수분 후(post-pollination)의 향기 발산, 화색과 향기성분과의 연관성에 대해 심층적인 연구가 수행되어야 할 것으로 보인다.

• 한국석유지질학회:학술대회논문집
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• 한국석유지질학회 1998년도 제5차 학술발표회 발표논문집
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• pp.22-28
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• 1998

Twenty species of calcareous nannofossils belonging to 11 genera are identified from the Seoguipo Formation in Cheju island, Korea. On the basis of the marker species, the Seoguipo Formation is biostratigraphically assigned to the Pseudoemiliania lacunosa Zone (NNl9), which corresponds to the combined zones of Emiliania annula - Emiliania ovata (CN13a-CN14a) of latest Pliocene and Early Pleistocene. Generally, cold-water species is dominant in the lower part, whereas warm-water one in the upper part. This is interpreted the palaeoceanographic condition has changed from cooling to warm phase. The change in floral composition and abundance of specific species allows the recognition of 4 ecostaratigraphic units in the Seoguipo Formation and the migration of oceanographic frontal boundary. According to nannofossil distribution in the study area, the position of an oceanographic boundary between warmer water and cooler water appeared to have oscillated north-south over the Korea Strait and Cheju island in response to glacial and interglacial cycles. The geologic time of the interpreted paleoceanographical changes determined by nannofossil biochronology is well agreed with the results obtained from the Japan Sea (East Sea) and Japan-Sea side of Japan.

• Journal of Forest and Environmental Science
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• 제33권3호
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• pp.161-171
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• 2017

Global environmental changes have the capacity to make dramatic alterations to floral and faunal composition, and elucidation of the mechanism is important for predicting its outcomes. Studies on global climate change have traditionally focused on statistical summaries within relatively wide scales of spatial and temporal changes, and less attention has been paid to variability in microclimates across spatial and temporal scales. Microclimate is a suite of climatic conditions measured in local areas near the earth's surface. Environmental variables in microclimatic scale can be critical for the ecology of organisms inhabiting there. Here we examine the effect of spatial and temporal changes in microclimates on those of carabid beetle communities in Hyangnobong, Korea. We found that climatic variables and the patterns of annual changes in carabid beetle communities differed among sites even within the single mountain system. Our results indicate the importance of temporal survey of communities at local scales, which is expected to reveal an additional fraction of variation in communities and underlying processes that has been overlooked in studies of global community patterns and changes.

• Journal of Microbiology and Biotechnology
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• 제34권8호
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• pp.1653-1659
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• 2024

Starter cultures used during the fermentation of malt wort can increase the sensory characteristics of the resulting beverages. This study aimed to explore the aroma composition and flavor recognition of malt wort beverages fermented with lactic acid bacteria (Levilactobacillus brevis WiKim0194) isolated from kimchi, using metabolomic profiling and electronic tongue and nose technologies. Four sugars and five organic acids were detected using high-performance liquid chromatography, with maltose and lactic acid present in the highest amounts. Additionally, e-tongue measurements showed a significant increase in the sourness (AHS), sweetness (ANS), and umami (NMS) sensors, whereas bitterness (SCS) significantly decreased. Furthermore, 20 key aroma compounds were identified using gas chromatography-mass spectrometry and 15 key aroma flavors were detected using an electronic nose. Vanillin, citronellol, and β-damascenone exhibited significant differences in the flavor profile of the beverage fermented by WiKim0194, which correlated with floral, fruity, and sweet notes. Therefore, we suggest that an appropriate starter culture can improve sensory characteristics and predict flavor development in malt wort beverages.

• KIEAE Journal
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• 제13권6호
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• pp.29-37
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• 2013

The modern town houses in Philippines has been changed through Spanish colonization over 300years and American military administration in 20C. Especially Cebu, the first contemporary capital of colonized Philippines by Spain, has various cultural characteristics and historical remains including old houses. By the economy condition in Cebu growing up, Bahay na bato, stone and wood house, has been settled for the elite or middle class of Cebu around 19C influenced by Spanish or Europe and Philippines native house called bahay kubo. Bahay na bato shows a common features, as revealed in this study, which all of them has a two stories with cut stone curtain wall and wooden beam and lintel, fronting the main street by approaching directly from street. And spatial separating also shown by setting living space to upper level instead of using storage or entrance hall called zaguan in lower level. Bahay na bato studied here shows a particular appearances in elevation, having volada and elaborate geometric or floral window pattern, also playing a role for ventilation with vetanilas below volada and main window in section. They have a rectangular plan with caida, sala, comedo, azotea almost similar to Spanish and ealier colonial Mexico style mixed with Philippines traditional style showing the strong spatial separation functionally and space wideness for party occasionally.

• 한국축산식품학회지
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• 제28권3호
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• pp.263-268
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• 2008

밀원에 따른 다양한 꿀의 품질특성과 이들에 의한 밀원 판정의 가능성을 조사하기 위하여 아카시아 꿀 7개, 잡화 꿀 9개, 밤꿀 5개, 토종 꿀 5개, 총 26개의 시료를 이용하여 꿀의 당, 수분함량, 총 산도, fructose/glucose ratio 등을 조사하였다. 꿀의 수분 함량은 아카시아 꿀이 가장 낮았으나, 밀원에 따른 차이를 나타내지 않았다. 당 조성 중 fructose의 함량이 가장 높았으며, glucose, sucrose, maltose의 순으로 높았다. 당 성분으로 밀원에 따른 차이가 나타내지 않았다. Fructose/glucose ratio도 현저한 차이를 나타내지 않았으나, 아카시아 꿀과 밤 꿀의 fructose/glucose ratio가 잡화 꿀에 비해 높았다. 꿀의 총 산도는 밀원의 종류에 상관없이 10.30-12.45 meq/kg이었으며, 밀원에 따른 꿀의 구별에 관한 기준은 되지 못하였다.