30 samples of sea water at the Do Son coast in 3 sections of Do Son tourism zone was randomly analyzed by using the cross - sectional study in 2001. Physical feature: most of sea water samples analyzed at section I of Do Son did not reach standards of hygiene, samples in section II and III reached hygiene standards, except for color feature, only 60% samples had hygiene standards. Chemical feature: all samples analyzed had higher NH3 and NaCL concentration than that of permitted standards. This is an interested issue to limit sea water pollution in this tourism zone
Seawater ; Diagnosis ; Chemistry

Trace uranium detection measurement was performed using DNA immobilized on a graphite pencil electrode (DGE). The developed probe was connected to the portable handheld voltammetric systems used for seawater analysis. The sensitive voltammogram was obtained within only 30 s accumulation time, and the anodic stripping working range was attained at 100~800 microg/l U and 10~50 microg/l. The statistic relative standard deviation of 30.0 mg/l with the 15th stripping was 0.2115. Here, toxicological and analytical application was performed in the seawater survey in a contaminated power plant controlling water. The results were found to be applicable for real-time toxicological assay for trace control.
DNA ; Electrodes ; Graphite ; Power Plants ; Seawater ; Uranium ; Seawater

Voltammetric detection of the toxic Zn ion was investigated using a fluorine-doped graphite pencil electrode (FPE). It is notable from the study that pencils were used as reference and working electrodes. In all the experiments, a clean seawater electrolyte solution was used to yield good results. The analytical working range was attained to 10 microgL-1. The optimized voltammetric condition was examined to maximize the effect of the detection of trace Zn. The developed sensor was applied to an earthworm's tissue cell. It was found that the methods can be applicable to in vivo fluid or agriculture soil and plant science.
Agriculture ; Electrodes ; Graphite ; Plants ; Seawater ; Soil ; Zinc

Vibrio vulnificus is an opportunistic human pathogen, transmitted from seawater, raw oyster, and shellfish and responsible for severe septicemia. We studied V. vulnificus from surface seawater around Jeju Island between 2010 and 2011. In 2010, V. vulnificus was isolated and V. vulnificus septicemia was reported. Surface seawater temperature is an important factor for growth of V. vulnificus, and here we showed that high surface seawater temperature may influence growth of V. vulnificus and occurrence of emerging V. vulnificus septicemia on Jeju Island. This is the first report of isolation of V. vulnificus and emerging V. vulnificus septicemia on Jeju Island.
Humans ; Ostreidae ; Seawater* ; Sepsis* ; Shellfish ; Vibrio vulnificus*

Death by drowning is a major cause of unnatural death worldwide. It is therefore important to conduct forensic examination of immersed bodies following drowning, in order to determine the diagnosis of drowning, because no specific methods have been established thus far. Therefore, we performed a series of rat experiments to compare autopsy findings between seawater and fresh water drowning cases, which included the presence of pleural effusion and histologic findings of the lung. The results showed that the volume of pleural effusion increased in the seawater drowning group compared to the fresh water drowning group, and the total weight of lung was affected by the type of drowning medium and postmortem interval. However, histologic findings of the lung showed no significant difference between the 2 types of drowning mediums.
Animals ; Autopsy ; Drowning ; Fresh Water ; Lung ; Pleural Effusion ; Rats ; Seawater

Animals ; Electroencephalography ; Heart ; physiopathology ; Immersion ; physiopathology ; Rats ; Rats, Wistar ; Seawater

E1 tor cholera epidemic have been reported eight times in Korea since 1963. Researchers suspected unattempted importation of cholera bacteria from foreign countries or artificial germination by some people. No researchers have made hypotheses of environmental reservoir as the sources of cholera epidemics until in 1991 in Korea. This study focuses on the aquatic reservoir as the potential source of cholera epidemic. A total of 68 cholera patients were noted in 1995 and only two in 1996. Authors argue for aquatic reservoir as the source of 1995, 1996 cholera epidemic and designate sea fishes as the vehicle of cholera infection The national Institute of Health team cultured Vibrio cholera O1, from the samples of sea water from Kangwha county in September 1995. The sporadic Occurrence of cholera patients around the country who have not traveled out of town support aquatic environmental reservoir as the source of 1995, 1996 cholera epidemic in Korea.
Bacteria ; Cholera* ; Fishes ; Germination ; Humans ; Korea* ; Seawater ; Vibrio

During a survey of marine fungi from the waters surrounding Jeju Island, Korea, several Penicillium strains were isolated from seawater and marine sponges. Based on morphological characteristics and phylogenetic analyses of the internal transcribed spacer and RNA polymerase subunit II, four strains were identified as Penicillium antarcticum, a fungus that, to the best of our knowledge, had not been previously reported in Korea. Here, we provide detailed descriptions of the morphological characteristics and extracellular enzyme activities of the four strains.
DNA-Directed RNA Polymerases ; Fungi ; Korea ; Penicillium* ; Porifera ; Seawater ; Water

The introduction of metagenomics into the field of virology has facilitated the exploration of viral communities in various natural habitats. Understanding the viral ecology of a variety of sample types throughout the biosphere is important per se, but it also has potential applications in clinical and diagnostic virology. However, the procedures used by viral metagenomics may produce technical errors, such as amplification bias, while public viral databases are very limited, which may hamper the determination of the viral diversity in samples. This review considers the current state of viral metagenomics, based on examples from Korean viral metagenomic studies-i.e., rice paddy soil, fermented foods, human gut, seawater, and the near-surface atmosphere. Viral metagenomics has become widespread due to various methodological developments, and much attention has been focused on studies that consider the intrinsic role of viruses that interact with their hosts.
Atmosphere ; Bacteriophages ; Bias (Epidemiology) ; DNA Viruses ; Ecology ; Ecosystem ; Humans ; Korea ; Metagenomics ; Seawater ; Sequence Analysis, DNA ; Soil

BACKGROUND AND OBJECTIVES: The effect of the hypertonic nasal douching solutions on mucociliary clearance was studied to ascertain the effect of hypertonic seawater. MATERIALS AND METHODS: Twenty-eight normal subjects were included in a randomized double -blind crossover trial. Hypertonic seawater (3%, Sinomarin(R)) was used as a hypertonic nasal douching solution. In order to determine the effect of hypertonic seawater on nasal mucosa, the mucociliary clearance was measured by the saccharin clearance time (SCT). RESULTS: The resultant SCT after administration of hypertonic seawater was significantly reduced compared with normal saline (0.9%)(p<0.05). CONCLUSION: This results showed that the hypertonic seawater improved mucociliary clearance time in the nasal cavity. The mechanism of this effect is probably brought about by changes in mucus viscoelastic properties.
Mucociliary Clearance* ; Mucus ; Nasal Cavity ; Nasal Mucosa ; Saccharin ; Seawater* ; Therapeutic Irrigation