• Journal of Wellbeing Management and Applied Psychology
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• v.5 no.3
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• pp.19-25
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• 2022

Purpose: As interest in odor increases, odor complaints are also rapidly increasing. Traditional markets are not included in malodor control areas and are not easy to manage, so measure the odor substances generated in traditional markets and analyze the cause of high concentration points. Research design, data and methodology: The average value was presented by continuously measuring the combined odor, TVOC, hydrogen sulfide, and ammonia for 5 minutes at 100m intervals in Joong-ang traditional market, Jayu traditional market, Doraemi traditional market, and Sundae Alley in Wonju, Gangwon-do. In each market, up to the third highest concentration point for each measurement item was marked and analyzed. Results: The Joong-ang traditional market, Doraemi traditional market, and Sundae Alley had high readings at the intersection. The Jayu traditional market had high measurements around restaurants and clothing stores. In addition, the concentration of complex malodors was also high at the points where the hydrogen sulfide concentration was measured. Conclusions: Odor generated in traditional markets is an important indicator for merchants and consumers. Therefore, in future studies, analysis that can supplement the limitations of measurement data and seasonal effects is needed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.10a
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• pp.36-37
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• 2010

Lab scale experiment was carried out to study applicability of BM (Beneficial Microorganisms) to the conventional SBR system for the shipboard sewage treatment. BM has been successfully applied to the wastewater treatment by the SBR process and hence this system maintained a stable effluent quality together with an increased treatment efficiency, meeting the requirements of IMO regulations. The SBR system facilitated by BM would be a suitable process for cruise ships in terms of the malodor control, treatment efficiency and operation conveniences.

• Journal of Korean Dental Hygiene Science
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• v.1 no.1
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• pp.37-46
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• 2018

This study conducted a 'specialist tooth brushing' method against the severely disabled once every other week. The purpose of this study is to analyze and validate the effectiveness of maintaining healthy periodontal management when consistent oral hygiene lasts with minimum stimuli for 24 - months. The conclusions were as follows. Table 2 compares the difference between group 1 and 2 from the 1^st to 11th management and verifies the actual difference in measurement of each index. Group 1 used a professional tooth brush while Group 2 used a general brush. There were found many significant differences in dental index. As for PHP, Oral Malodor index and gingival bleeding, it was found that one or two times of dental care can make substantial differences in dental health condition. These results show that as the number of toothbrush method has been increased, gingival bleeding and periodontal index are significantly improved, not to mention the improvement of gingivitis and periodontal disease. This is because periodontal tissue is affected by brushing method, brushing time and consistency of dental care. During the 6-month period, 20 minutes of active periodontal care was intensively conducted, and for 18-months the effect of consistent care was verified by 10-minute periodontal care once every other week. As a result of the test, it was found that there was no complete regression in the basic periodontal treatment and the periodontal health condition had been maintained for 24 months. Also this test shows that, despite of inconsistent dental hygienic care, regular plague control can prevent dental diseases and maintain the dental health. This study proved that periodontal condition can be maintained by periodontal care once every other week as the tooth brushing properly stimulates the gums with positive effect. Therefore, professional dental healthcareworkers should be designated for each facility for the disabled, and dental health of the disabled should be professionally cared on a regular basis, and consistent and repetitive management by the dental care specialist are required.

• Journal of Korean Clinical Health Science
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• v.3 no.1
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• pp.268-275
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• 2015

Purpose. Most of halitosis is found by people than by themselves in their life. There are some people who are suffering from oral malodor psychasthenia although they do not have halitosis which may disturb social life by sociophobia. Methods. The subjects of this survey were the dental hygienic college students in Busan city and Gyeongnam province from December 1 to December 20, 2013, we use the 281 parts except for the 19 parts of a bad faith response of 300 parts. Results. As a response to the awareness of the halitosis of college students, "the smell became sometime" was highest in 63.3%, and tooth brushing of halitosis, In according to about awareness of halitosis brushing the number of cases showed a 73.4% increase when you answered "no" in case one day the number of brushing at least three times less than a minute halitosis awareness conducted brushing (p<0.05),in case of less than 1 minute brushing time, this was a statistically significant increase halitosis awareness (p<0.05). Conclusions. This study assessment the association between halitosis awareness and oral care habits was to provide students with the basis for education and counseling halitosis in clinical.

• Journal of the Korea Organic Resources Recycling Association
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• v.13 no.1
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• pp.90-99
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• 2005

This study was conducted to survey the attitude of Chuncheon citizens on food waste generation. About 50% of the citizens were generating $5{\sim}10{\ell}$ of MSW (municipal solid wastes) a week. These answers were almost from below 35 years old. And the citizens answered that the ratio of FW (food waste) to MSW were 10-30%. They were generating FW enveloped in a standardized vinyl bag after dewatering. About 10% of the answers were generating FW with MSW without any dewatering. The reason for FW generation in large quantities was to cook and buy much more food materials than needed. They thought that malodor and harmful insect were the most severe problems from FW storage. The systematic management was the most needed in individual restaurants. They answered that an individual citizen should make an effort to reduce FW generation. However, in fact, they did not do their best to try to reduce FW generation. They agreed that an individual citizen should try to reform 'present food culture' and to think FW as resources.

• Journal of Oral Medicine and Pain
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• v.26 no.3
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• pp.243-252
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• 2001

본 연구에서는 구강 내 공기 중 설태 제거 전후의 휘발성 황화합물 농도를 gas chromatography를 이용하여 비교 분석하였다. 피검자로는 서울대학교 치과병원 구취클리닉에 내원한 환자 중에서 치주 건강 상태가 양호하며 구취를 호소하는 환자 18 명(평균연령 31.4세; 남자 8명, 여자 10명)을 대상으로 하였으며 구취를 측정하기 전에 모든 피검자들은 실험 전날 취침 전부터 실험 당일 실험시작 전까지 음식 섭취나 양치질 등의 모든 구강 활동을 금지하였다. 구취 시료는 채취 전에 피검자로 하여금 3분간 입을 다물게 한 후 입을 약 2cm정도 벌린 상태에서 시행하였으며 시료 채취 후 설태를 제거하였다. 설태 제거 후에 구강 내 공기를 다시 채취한 후 gas chromatography를 통하여 휘발성 황화합물의 각 성분별 농도를 분석하였다. 분석과정에서는 과거에 휘발성 황화합물의 검출 시 사용되어진 sampling loop와 isothermal run condition 대신 좀더 효율적인 직접표본주입방법과 oven temperature programmed analysis를 시행하였다. 1. 전체 휘발성 황화합물은 Hydrogen sulfide (59.96%), Methyl mercaptan (25.08%), Dimethyl sulfide (14.96%)로 구성되었다. 이 중 Hydrogen sulfide는 전체 휘발성 황화합물중 약 60%를 차지하여 치주상태가 양호한 구취환자에서의 주요한 구취 구 성 성분이었다. 2. 설태 제거 후 전체 휘발성 황화합물의 농도감소는 제거 전에 비하여 41.71%로 유의 하게 감소하였다(p<0.01). 3. 설태 제거 후에 Hydrogen sulfide의 농도감소는 43.62% (p<0.01), Methyl mercaptan 의 농도감소는 38.88% (p<0.05), 그리고 Dimethyl sulfide의 농도감소는 30.21% (p<0.01)로 각각 유의하게 감소하였다. 4. 전체 휘발성 황화합물의 구성비율은 설태 제거 전후에 유의한 차이가 없었다 (p>0.05).

• Journal of Oral Medicine and Pain
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• v.26 no.3
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• pp.225-241
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• 2001

구취에 대한 환자의 주관적 감각은 다양한 심리학적 요소들에 의하여 영향을 받을 가능성이 있다. 본 연구에서는 구취 환자의 심리학적 특징을 살펴보기 위하여, 구취를 주소로 내원한 환자 446명과 일반적인 치과 치료를 위하여 내원한 환자 63명을 대상으로 간이정신진단검사 (SCL-90-R), 구취 설문검사, 구취 측정 검사를 시행하여 분석한 결과 아래와 같은 결론을 얻었다. 1. 남성 구취 환자와 여성 구취 환자의 연령분포는 통계학적으로 유의한 차이를 보였다 (p<0.001). 남성에서는 20대, 30대, 40대에 고르게 분포한 반면, 여성에서는 20대와 30대에 집중되어 분포하였다. 2. 구취의 인식 유형은 남녀간에 통계학적으로 유의한 차이를 보였다 (p<0.01). 구취 인식 유형 중 타인에 의한 지적이나 타인의 행동으로 인한 추측 없이 스스로 구취를 인지하는 유형은 여성 구취 환자에서만 관찰되었다. 3. 구취 환자는 대조군에 비하여 강박증, 불안, 적대감, 전체심도지수에서 높은 수치를 보였다 (p<0.05). 4. 여성 구취 환자는 남성 구취 환자에 비하여 강박증(p<0.05), 불안 (p<0.05), 편집증 (p<0.001)에서 높은 수치를 보였다. 5. 남성 구취 환자에서는 표출증상합계를 (p<0.05) 제외한 모든 간이정신진단검사 항목에서 고농도 VSC군과 저농도 VSC군간에 유의한 차이를 보이지 않았다. 여성 구취 환자에서는 저농도 VSC군이 신체화를 제외한 모든 간이정신진단검사 항목에서 고농도 VSC군에 비하여 높은 수치를 보였다 (p<0.05). 6. 여성 구취 환자에서 주관적 구취심도는 강박증, 대인예민성, 불안, 적대감, 공포불안, 전체심도지수, 표출증상심도지수 들과 유의한 상관관계를 보였고 (p<0.05), 주관적 구취불편감은 모든 간이정신진단검사 항목들과 유의한 상관관계를 보였다 (p<0.05).

• Journal of Oral Medicine and Pain
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• v.24 no.4
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• pp.387-396
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• 1999

구취를 주소로 내원한 환자 중 구취의 치료 후 객관적인 구취의 감소가 인정되는 데도 불구하고, 계속해서 구취를 호소하며 만족해 하지 못하는 환자들의 심리적 특성을 알아보고자 하였다. 구취를 주소로 서울대학교 치과병원 구강진단과 구취클리닉에 내원하여 검사 및 치료를 시행한 환자 중, 치료 전 객관적 구취의 소견을 보였으나, 치료 후 할리미터 수치의 객관적인 감소를 보이는 40명의 구취 환자를 대상으로 하였다. 치료 전, 모든 환자들은 자신의 주관적 구취 심도 및 그로 인한 불편감 정도를 표시하였고, 간이정신진단검사 (SCL-90-R)를 시행하였으며 할리미터를 이용하여 구강내 휘발성황화합물의 농도를 측정하였다. 치료 후, 구강내 휘발성황화합물의 농도, 주관적 구취 심도 및 불편감 정도를 재측정하였다. 주관적 구취 심도의 감소 정도에 따라 환자들을 두 군으로 분류하여 할리미터 수치와 불편감 정도 및 간이정신진단검사항목을 비교, 분석하였다; A군-주관적 구취 심도가 평균값 이상으로 감소한 환자군; B군-주관적 구취 심도가 평균값 이하로 감소한 환자군. 1. 치료 전후 모두에서 주관적 구취 심도와 휘발성황화합물 농도 사이에는 유의한 상관관계가 없었으며 주관적 구취 심도의 감소 정도 또한 휘발성황화합물의 감소 정도와 상관관계가 없었다. 2. 치료 전 휘발성황화합물의 농도는 치료 후 휘발성황화합물의 감소치와 유의한 상관관계를 보였다 (p < 0.01). 3.구취로 인한 불편감 정도는 주관적 구취 심도와 유의한 상관관계를 보였으며 (p < 0.01), 치료 후 A군에서는 유의하게 감소 (p < 0.01) 하였으나, B군에서는 유의한 감소를 보이지 않았다. 4. B군은 A군에 비하여 간이정신진단검사 항목 중 대인예민성과 우울증의 항목에서 유의하게 높은 수치를 보였다 (p < 0.05).

• Journal of Korean Society for Atmospheric Environment
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• v.23 no.1
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• pp.39-49
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• 2007

In this study, the performance characteristics of solid phase microextraction (SPME) were investigated for three major odorous groups that consist of 10 individual compounds ([1] volatile organic compounds (VOC): benzene, toluene, p-xylene and styrene, [2] reduced sulfur compounds (RSC): hydrogen sulfide, methyl mercaptan, dimethylsulfide (DMS), dimethyldisulfide (DMDS), and carbon disulfide, and [3] amine: trimethylamine (TMA)). For the purpose of a comparative analysis, two types of SPME fiber ([1] polidimethylsiloxane/divinilbenzene (P/D) and [2] $Carboxen^{TM}$/polidimethylsiloxane (C/P)) were test ε d against each other for a series of standards prepared at different concentration levels (100, 200, and 500 ppb). To compare the analytical performance of each fiber, all standards were analyzed for the acquisition of calibration data sets for each compound. The results of P/D fiber generally showed that its calibration slope increased as a function of molecular weight across different VOCs; however, those of C/P fiber showed a fairly reversed trend. Besides, we confirmed that the application of SPME is limited to many sulfur compounds; only two compounds (DMS and DMDS) are sensitive enough to draw calibration results out of SPME. The calibration data for RSC show generally enhanced slop values for C/P relative to P/D fiber. However, in the case of TMA, we were not able to find a notable difference in their performance.

• Proceedings of the Korean Environmental Health Society Conference
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• 2005.06a
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• pp.399-405
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• 2005

In this study, we investigated the gas chromatography (GC) and pulsed flame photometric detection (PFPD) system for the analysis of four major reduced S compounds including hydrogen sulfide ($H_2S)$; methyl mercaptan ($CH_3SH$); dimethyl sulfide (DMS); and dimethyl disulfide(DMDS) contained in environmental samples. To analyze these compounds in high concentration range (above ppb level), we developed a high mode analytical setting with the loop-injection system. By contrast, we also established a low mode setting for the analysis of low concentration samples (ppt-level samples from ambient air) by the combination with thermal desorption unit(TDU). Comparative analysis of both settings revealed that relative detection properties of four S compounds are systematic enough. The results of high mode analysis indicated that the patterns were systematic among compounds: H2S exhibited the lowest sensitivity, while DMBS showed the strongest one. The results were also compared in terms of sensitivity reductions for all compounds by dividing slope ratios between low and high mode system. Although low mode system exhibited significant reductions on the order of a few tens times, their detection characteristics were highly consistent as it was shown in the high mode setting. To learn more about absolute and relative relations between two different modes of S analysis, future studies may have to be directed to cover more complicated nature of GC/PFPD performance. Hydrogen sulfide($H_2S$) was over in summer about low level of olfactory sense 410 ppt, Methyl mercaptan(C$H_3SH$) was over in apring and summer about low level of olfactory sense 70, Dimethyl sulfide(DMS) was not over in four season about low level of olfactory sense 2,200 ppt. Carbon disulfide($CS_2$) was not over in four deason about Tow level of olfactory sense 210,000, Dimethyl disulfide(DMDS) was not over in summer about low level of olfactory sense2,000.