Microbiological Pollution Investigation of Lowland Spring Water at the Jeju City Waterfront, Jeju Island
TL;DR: The results of the analyses showed that hydrogen ion concentrations (pH) for spring water were 0.43 to 7.9.4℃, and the range of geometric means of total coliforms was 9.9-151.6 MPN/100 ml as discussed by the authors.
Abstract: Bacteriological examination of spring water in Jeju City was conducted. A total of 21 spring water samples were collected from January to April, 2010. During the study period, the range of temperature was 0.6 to 15.4℃, and the results of the analyses showed that hydrogen ion concentrations (pH) for spring water were 0.43 to 7.9. Salinity levels for the samples averaged from 3.0 to 1.64%, and levels of water-dissolved oxygen were 1.85 to 6.06 mg/l. The range of total coliforms in spring water samples at 21 stations located in the designated spring water were 1,600 MPN/100 ml. Furthermore, the range of geometric means of total coliforms was 9.9-151.6 MPN/100 ml, while the range of fecal coliforms in spring water samples at 21 stations located in the designated spring water area was 1,600 MPN/100 ml. Finally, the range of geometric mean of fecal coliforms was 3.1-151.6 MPN/100 ml. The level of microbial contamination was examined in 21 samples for indications of bacterial contamination such as heterotrophic bacteria, Escherichia coli O157:H7, Salmonella spp., Vibrio parahaemolyticus, Staphylococcus aureus, and Shigella spp. were frequently detected in the spring water. Salmonella spp., Shigella spp., Vibrio parahaemolyticus, and S. aureus were detected in the range of 0-0.5×10 1 , 0-0.1×10 1 , 0-0.1×10 1 , and 0-0.3×10 1 CFU/ml, respectively, while E. coli O157:H7 was not detected in the examined spring water samples.
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TL;DR: In this article, a comparison of deuterium excess or d -values of precipitation and groundwater at Cheju Island, Korea, indicates that, unlike in many temperate climates, precipitation during the whole year contributes to groundwater recharge.
126 citations
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...호소수질환경기준에는 총 대장균과 분원성 대장균군이 포함되어 있다[3,9]....
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TL;DR: Results indicate that typical coliforms of the warm-blooded animal gut contribute a relatively small percentage of the organisms associated with vegetation and insects and support the current interpretation of the significance of the fecal coliform test for stream investigations or for surface water quality evaluations.
Abstract: This study considers the sanitary significance of coliforms, fecal coliforms, and streptococci isolated from 152 species of plants and 40 samples of insects. These specimens were collected from various ecological environments and grouped into several categories. Results indicate that typical coliforms of the warm-blooded animal gut contribute a relatively small percentage of the organisms associated with vegetation (14.1%) and insects, (14.9%). A total of 1,203 coliform strains from vegetation and 1,084 coliform strains from insects were classified as to IMViC type and fecal coliform. No type was predominant in either the vegetation or insect groupings. The biochemical results for 646 streptococci from vegetation and 226 cultures from insects were reported. The predominant group, Streptococcus fecalis, as defined by Sherman criteria, constituted a majority of all strains from vegetation and insects. The “Completed Coliform Test” is recommended for the examination of plant and insect specimens to eliminate the many anaerobic and aerobic sporeforming bacteria that frequently produce false positive reactions by the “Confirmed Test” procedure. These findings support the current interpretation of the significance of the fecal coliform test for stream investigations or for surface water quality evaluations.
93 citations
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...이들은 사람과 환 경 내에 많이 분포하고 환경의 변화에 안정하여 지표미생물로 의 기본 조건을 충족시키며 오염원에 대한 특이성을 가지고 있어 수질을 평가하는데 널리 이용되고 있다[5,14]....
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TL;DR: In this paper, the authors analyzed data from 455 water wells of Cheju volcanic island to determine hydrogeological characteristics, water quality, and sustainable yield of the groundwater resources in the island.
Abstract: Hydrogeologic data of 455 water wells comprising geologic logs, water qualities, and aquifer test results are analyzed to determine hydrogeological characteristics, water quality, and sustainable yield of the groundwater resources of Cheju volcanic island. The groundwater of the island occurs in unconsolidated pyroclastic deposits and clinkers interbedded in highly jointed basaltic and andesitic rocks as high-level, basal, and parabasal groundwater under unconfined conditions. The total storage of groundwater is estimated at about 44 billion m3. The average transmissivity and specific yield of the aquifer are at about 0.34 m2 s–1(29300 m2 day–1) and 0.12, respectively. The average annual precipitation is about 3.39 billion m3, of which 1.49 billion m3– equivalent to 44.0% of the total annual precipitation – is recharged into aquifers, with 0.638 billion m3 year–1 of runoff and 1.26 billion m3 year–1 of evapotranspiration. Based on a groundwater budget analysis, the sustainable yield is estimated at about 0.62 billion m3 year–1, equivalent to 41.6% of annual recharge. A low-permeability marine sedimentary formation (Sehwari formation), composed of loosely cemented sandy silt, was recently found to be situated at 120±68 m below mean sea level. If the said marine sediment is distributed as a basal formation of the freshwater zone of the island, most of its groundwater will be of parabasal type. So the marine sediment is one of the most important hydrogeological boundaries and groundwater occurrences in the area.
61 citations
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...제주도의 용천수는 기본적으로 지하수에 근간을 이루고 있기 때문에, 결국 제주 도의 용천수는 과거로부터 오늘날에 이르기까지 제주도민들 의 생활의 근거가 되고 있다[6]....
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TL;DR: Dietary supplementation of CS61 culture may improve growth performance and feed conversion efficiency in chickens through its anti-inflammatory effect, and its value as an alternative for antibiotics used as a feed additive is evaluated.
Abstract: Bacterial resistance to antibiotics and residues of antibiotics in poultry products have encouraged the use of probiotics, prebiotic substrates, and synbiotic combinations of prebiotics and probiotics as alternative approaches to the use of antibiotics in poultry. The present study was carried out to evaluate the effect of a new probiotic CS61 culture on growth performance, feed conversion efficiency, and safety in broiler chickens, and to evaluate its value as an alternative for antibiotics used as a feed additive. Two dosages of CS61 culture (0.1% and 1%) were fed to chickens for 28 days. The results showed that terminal body weight and daily weight gain in the treatment groups increased in a dose-dependent manner when compared with the control group. Dietary supplementation with CS61 culture also improved feed conversion rate compared to the control group. There were no treatment- related toxic effects in terms of clinical findings, mortality, necropsy findings, hematology, or serum biochemistry parameters in any group tested. The nitric oxide assay showed that CS61 peptide has a dose-dependent inhibitory effect on lipopolysaccharide-induced nitric oxide production in RAW 264.7 cells. The results of this experiment indicated that dietary supplementation of CS61 culture may improve growth performance and feed conversion efficiency in chickens through its anti-inflammatory effect.
10 citations
01 Jan 2006
5 citations
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...의 대한 기준을 수질관리에 적용하기 위한 연구가 우리나라에 도 폭넓게 진행되고 있으며[4,11,13], 기준이 점차 강화되는 경 향을 보이고 있다....
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