• 한국식품위생안전성학회지
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• 제37권4호
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• pp.271-276
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• 2022

본 연구에서는 식품접객업소에서 시중 판매되는 더치커피의 미생물 오염도를 조사하여 유형에 따른 차이를 살펴 보고자 하였다. 경기도 내 커피전문점에서 유통되는 더치커피 70건을 대상으로 위생지표균, 식중독균, 진균류 오염도를 조사하였으며 추출방법에 따른 일반세균과 진균류의 오염도를 비교하였다. 일반세균수는 0.74-6.21 log CFU/mL 범위로 검출되었으며 식품 유형에 따른 평균 검출량은 식품접객업소 조리식품(3.04 log CFU/mL)이 액상커피(2.08 log CFU/mL)보다 높게 나타났다. 액상커피는 검출된 6건 중 3건이 세균수 기준을 초과하여 부적합이었다. 식중독 원인균은 70건 모두 불검출이었다. 진균수는 0.70-4.00 log CFU/mL 범위로 검출되었으며 식품유형에 따른 차이는 없었다. 추출방법에 따른 미생물 오염도는 원두 혼합 여부와 추출 시간에 따라 비교하였으며, 일반세균수와 진균수 모두 유의적인 차이는 없었다(P>0.05). 시중 유통되는 더치커피는 일반세균과 진균류에 대한 오염도가 높으므로 위생적인 관리와 적절한 온도 유지를 통해 미생물 오염을 줄이는 것이 중요하며 안전성 확보를 위해 지속적인 모니터링이 필요할 것으로 생각된다.

• 한국유기농업학회지
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• 제5권2호
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• pp.125-140
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• 1997

This experiment was carried out to investigate the effects of compost mixed with microorganism compost fermented for the production of high quality plug seedlings of tomato and red pepper. The results are summarized as follows. As a result of compost analysis, EC value was increased with increment of microorganism compost supplemented but lowered gradually in the late period of seedlings growth, pH value of microorganism compost fermented was 9.3 which is strong alkalinity. In the plot of 30 percent of microorganism compost fermented early growth of tomato seedlings was better in terms of plant height, leaf area and total dry weight. However, early growth of red pepper seedlings was shown in the plot of supplemented with 20 percent of microorganism compost fermented. The higher the mixing rate over 60 percent of micrroganism compost fermented to the soil used retarded the seedlings growth regardless of tomato and red pepper.

• 한국식품저장유통학회지
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• 제3권2호
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• pp.145-148
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• 1996

This paper was carried out to investigate change in the initial microorganism of Pepper which were treated with ozonated water for microbial decontamination. When ozonated water was 30, 60, 90minutes treatment, there was decrease in the overall total microbial of the black & white pepper. Total lactic acid bacteria died completely after contacted with ozonated water for 60minutes but the inhibition rate on the total aerobic bacteria of black & white pepper were 62% and 96%, respectively. Total aerobic bacteria of four packing material was increased after 1 months of storage at 37$^{\circ}C$ when it had treated with 90minutes ozone reaction Then, there was no significant changes in the piperin contents.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2021년도 학술발표회
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• pp.128-128
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• 2021

Most of the studies about stormwater low impact development technologies used generalized observations without fully understanding the mechanisms affecting the whole performance of the systems from catchment to the facility itself. At present, these LID technologies have been treated as black box due to fluctuating flow and environmental conditions affecting its operation and treatment performance. As such, the implications of microbial community to the overall performance of the tree-box filter were investigated in this study. Summer season was found to be the most suitable season for microorganism growth since more microorganism were found during this season. Least microorganism count was found in spring because of the plant growth during this season since plant penology influences the seasonal dynamics of soil microorganisms. Litterfall during fall season might have affected the microorganism count during winter since, during this season, the compositional variety of soil organic matter changes affecting growth of soil microbial communities. Microbial analyses of sediment samples collected in the system revealed that the most dominant microorganism phylum is Proteobacteria in all the seasons in both inlet and outlet comprising 37% to 47% of the total microorganism count. Proteobacteria was followed by Acidobacteria, Actinobacteria and Chloroflexi which comprises 6% to 20%, 9% to 20% and 2% to 27%, respectively of the total microorganism count for each season. These findings were useful in optimizing the design and performance of tree box filters considering physical, chemical and biological pollutant removal mechanisms.

• 한국균학회지
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• 제48권2호
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• pp.135-149
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• 2020

Da-Lat is a hilly area located in southern Vietnam. Macrofungal diversity of Da-Lat was investigated from 2018 to 2019. A total of 468 macrofungal specimens was collected and identified using the modern species concept and taxonomic and phylogenetic analyses. Among them, internal transcribed spacer(ITS) region of 401 specimens were successfully sequenced and compared with those of related species retrieved from GenBank. In total, 180 specimens were identified at the species level. The sequenced specimens were classified into 2 phyla, 13 orders, 38 families, 93 genera, and 124 species. The remaining 221 specimens (175 species) did not match the species level. This study is the first well-documented taxonomic list of macrofungi collected from southern Vietnam.

• 한국물환경학회지
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• 제25권1호
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• pp.136-141
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• 2009

Inactivation rates between enterococci and total coliforms were compared in order to find the suitability of enterococci as an indicator microorganism under various experiment conditions - freshwater and/or seawater, indoor and/or outdoor conditions. In case of indoor laboratory experiments, inactivation rates of enterococci ($k_D$: 0.050~0.082) were faster than those of total coliforms ($k_D$: 0.034~0.045) in freshwater matrix. In seawater matrix, however, survival rate of enterococci was longer than that of total coliforms at two out of three experiments in indoor condition. When incubated in outdoor conditions, enterococci were inactivated significantly more rapidly than total coliforms both in freshwater and seawater matrices. With these results, enterococci appear to be less suitable than total coliforms in terms of inactivation rates.

• 대한한의학방제학회지
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• 제15권2호
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• pp.119-126
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• 2007

Objectives: This study presents observation of microorganism such as total aerobic bacteria, total fungus, E. coli, Pseudonomas aerugjnosa, Staphylococcus aureus, and Salmonella typhimurium in herbal decoction manufactured by Korean medical clinic. Methods: We examined to observe microorganism using the requirements for the experimental methods recommended by FDA. For the identification, we observed microscopic methods and carried out polymerase chain reaction (PCR) and DNA purification. The purified DNA samples were analyzed by DNA sequencer. As compared with NCBI database. the results were identified by sequences similarity. Results and conclusion: 26 (55%) of 46 decoctions observed positive for microbial test. 12 (46 %) of 26 positive decoctions exceed requirement of microbial limit test. These microbial colony identified genus of Bacillus using microscopic and DNA sequencing methods.

• 한국가금학회지
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• 제22권4호
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• pp.203-211
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• 1995

In order to investigate the effect of feeding live yeast on growth performance, nutrients utilization, tibia mineral deposit and intestinal microorganism changes, a growth assay was conducted with 360 broiler chicks. Treatments were four levels of yeast as 0, 0.025, 0.05 and 0.1% in 1.83% tricalcium phosphate and two levels of yeast as 0 and 0.05% in 1.15% tricalcium phosphate. The crude protein content of live yeast was 45%, and 97% of it was in the pure protein form, with 46.6% of essential amino acids and 53.4% of non-essential amino acids. Growth performance was tended to increase by feeding the yeast but there was no significant difference(P>.05). The protein digestibility was increased as the feeding level of yeast increased. However, digestibilities of fat, fiber, calcium and phosphorus were not affected by the yeast. Ash and calcium content of tibia were increased as the level of yeast increased. Total number of E. coli in small intestine was significantly decreased(P<.05) in chicks fed yeast. Total number of Lactobaci1lus was significantly increased by the yeast feeding. The changes of microorganism in cecum had the same trend with the changes of microorganism in small intestine.

• 설비공학논문집
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• 제18권8호
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• pp.620-626
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• 2006

Recently, indoor air quality (IAQ) is one of the greatest problems in our modern societies. Although research for IAQ is made rapid progress but IAQ problems concerning in door microorganism contamination is required to be studied still more. So we have investigated the indoor microorganism concentration of a variety of department store, subway station, underground shopping center, kindergartens, library where people complain about the in-door air quality. The experiment on microorganism concentration of indoor air was carried out and the average of total microorganisms was measured. Comparing the experimental results with existing foreign criterion, the experimental results show that the ministry of environment recommendation microorganism concentration value ($800 CFU/m^3$) is in need of revision in the near future.

• 한국식품위생안전성학회지
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• 제36권5호
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• pp.382-391
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• 2021

2020년 경기도내 유통 중인 고춧가루의 미생물 오염도를 구매 장소, 원산지, HACCP 및 살균 여부에 따라 조사하고, 보관방법에 따른 품질 변화를 연구하였다. 유통 중인 고춧가루 100건을 수거하여 검사한 결과 3건(대형마트 2건, 재래시장 1건)에서 Bacillus cereus가 검출되었으며, 27건(대형마트 9건, 재래시장 18건)에서 Clostridium perfringens가 검출되었다. 대형마트와 재래시장에서 수거한 고춧가루의 일반세균수 검출량은 통계적으로 유의적인 차이는 없었으나 7 log CFU/g을 초과하는 고춧가루의 수는 대형마트보다 재래시장이 더 많았다. 보관온도(30℃, 4℃, -20℃)와 보관용기(지퍼백, 비닐봉투)에 따라 7개월까지 저장 실험한 결과, 저장 기간에 따라 미생물학적 품질에는 큰 차이가 나타나지 않았다. 그러나 30℃에 저장한 고춧가루의 수분함량 및 ASTA color value는 저장 3개월 이후 크게 감소하였다. 따라서 고춧가루의 장기 보관 시 품질을 유지하기 위해서는 냉장고 또는 냉동고에 보관하는 것이 바람직하다고 생각된다.