인공 습지 모형을 활용한 습지의 미세먼지 저감 효과

손가연(Ga Yeon Son),김재근(Jae Geun Kim) 한국습지학회 2020 한국습지학회지 Vol.22 No.1

본 연구에서는 습지 조성 및 습지 내 식물에 따른 미세먼지 저감 능력 규명을 통해 습지생태계의 가치에 대하여 새로운 시각의 해석을 제공하고자 하였다. 소형 간이온실(70cm W × 70cm L × 60cm H)로 닫힌계를 형성하였으며, 간이온실 내메조코즘에 일정 수위가 유지되는 습지(W) 혹은 건조 상태를 유지하는 육상(L) 조건을 조성하였다. 육상과 습지 조건 각각에 식물종 미식재, 단일종 식재 그리고 두 종 혼합 식재의 총 8가지 조건을 4반복씩 조성하였다. 열린계의 메조코즘에서 초기 대기질과 닫힌계로의 전환 1시간 경과한 후의 대기질을 측정하여 공기 정화능을 확인하였다. 각 실험구의 대기질로서PM2.5, PM10농도를 중점적으로 측정하였으며, 2차 실험에서는 식물체의 건중량을 측정하였다. 닫힌계 형성 1시간 후 습지 환경에서의 PM2.5와 PM10의 감소량은 1차 실험에서 각각 13.7±1.3, 15.0±1.4 ㎍・m-3・hr-1로 나타났으며, 2차 실험에서는 각각 10.5±2.1, 11.2±2.2 ㎍・m-3・hr-1로 나타났다. 육지 환경에서의 미세먼지 감소량은 1차 실험에서 각각13.2±1.3, 13.8±1.5 ㎍・m-3・hr-1로 나타났으며, 2차 실험에서는 각각 9.2±1.5, 8.8±1.4 ㎍・m-3・hr-1로 나타났다. 이는 습지의 높은 생산성으로 인한 식물의 생장으로 식물의 조직에 미세먼지 흡착을 통한 저감이나 증산작용을 통한 수분, 또습지 자체의 수생태계적 특성을 통한 미세먼지 저감 효과가 드러난 것으로 여겨진다. 따라서 습지의 미세먼지 저감 능력은습지의 또 다른 가치로 볼 수 있으며 이는 미세먼지 문제에 대한 해결방안 중의 하나로 제시될 수 있을 것이다. To assess the wetland systems’ capability to reduce fine dust, we used an artificial wetland module of small-sized greenhouse (70cm W × 70cm L × 60cm H) which creates a closed system. Experiment was performed twice using four species in each experiment. Non-plantation, one species, or two species condition was created in each mesocosm. We measured air quality, primarily PM2.5 and PM10 at the initial open mesocosms and 1hr later since mesocosms were closed. The dry weight of vegetation was measured at the 2nd experiment. The decreased amount of PM2.5 and PM10 was 13.7±1.3 and 13.2±1.3 ㎍・m-3・hr-1 in wetland condition and 15.0±1.4 and 13.8±1.5 ㎍・m-3・hr-1 in dryland condition, respectively. In 2nd experiment, the decreased amount of PM 2.5 and PM 10 in wetland condition was 13.7±1.3 and 9.2±1.5 ㎍・m-3・hr-1, 15.0±1.4 and 8.8±1.4 ㎍・m-3・hr-1 in dryland condition, respectively. Wetland showed higher removal effect due to its high productivity leading to more effective absorption of particulate matter. Furthermore, the aquatic characteristics of wetland system and high humidity helped purifying the air quality. This can be seen as another value of wetlands, which can be presented as one of the solutions to the problem of fine dust.

일부 지역 치위생(학)과 학생들의 취업 인식도 조사

양송이 ( Song Yi Yang ),손가연 ( Ga Yeon Son ),조미숙 ( Mi Suk Cho ),오상환 ( Sang Hwan Oh ) 한국치위생학회 2015 한국치위생학회지 Vol.15 No.4

Objectives: The purpose of the study was to investigate the awareness towards employment in the dental hygiene students. Methods: A self-reported questionnaire was completed by 425 dental hygiene students in Chungcheongdo and Gyeongsangdo from July to September, 2014. Except incomplete answer, 401 data were analyzed using SPSS 20.0 program. The questionnaire consisted of three questions of general characteristics of the subjects, nine questions of awareness towards employment, six questions of awareness of employment preparation, and eleven questions of awareness of employment outlook. Results: The dental hygiene students prefer to dental hygiene related institution including dental hospital, dental clinic, general hospital, and university hospital. The awareness for the knowledge of desired employment institution was average. The main access for the information of the employment was internet, and senior and professor’s advice, The most important preparations for the employment were a practical skill, trust, certificate, license, communication skill and English proficiency. The future outlook for the dental hygienist within five years was not optimistic, and the best way to overcome the weka point was specialization of the dental hygienist. Conclusions: This study will provide the useful information on improvement of employment strategy program for dental hygiene students.

일부 노인요양시설 종사자의 노인구강건강관리 인지도 조사

김설희 ( Seol Hee Kim ),김춘희 ( Chun Hee Kim ),손가연 ( Ga Yeon Son ),양송이 ( Song Yi Yang ),조미숙 ( Mi Suk Cho ),오상환 ( Sang Hwan Oh ) 한국치위생학회(구 한국치위생교육학회) 2014 한국치위생학회지 Vol.14 No.5

Objectives : The purpose of the study is to investigate the perception of elderly oral health care in the care workers in nursing homes. Methods : A self-reported questionnaire was filled out by 200 care workers in nursing homes in Daegu and Busan. Data were analyzed by SPSS 18.0 program. Results : The oral health care was maintained by innately healthy mouth(49.5%), dentists(48.5%), public health centers including institution and dentistry(46.5%), regular visit to dentistry(44.0%), and ingestion of healthy food(38.5%). Fifty eight percent of the respondents(116 persons) agreed that regular and proper toothbrushing is the most important behavior to maintain the healthy teeth. The regular visit to dental clinics(Wald=7.076, p=0.008) and an oral care by specialist (Wald=5.210, p=0.022) influenced on elderly oral health status(p<0.05). Conclusions : The oral health care education is very important for the workers in the nursing homes that the education can improve the perception toward the elderly oral health.

치위생(학)과 졸업예정자의 취업준비 및 선호도에 관한 조사연구

황지영 ( Ji Young Hwang ),양송이 ( Song Yi Yang ),손가연 ( Ga Yeon Son ),원복연 ( Bok Yeon Won ),오상환 ( Sang Hwan Oh ) 한국치위생학회(구 한국치위생교육학회) 2013 한국치위생학회지 Vol.13 No.4

Objectives : The purpose of this study was to investigate dental hygiene majoring students on employment preparation and job preference. Methods : Subjects were 471 dental hygiene majoring students in Seoul, Gyeonggi-do, Gangwon-do, Daejeon, Chungcheong-do, Busan, and Jeju-do. Except 34 incomplete answers, 437 copies were analyzed. Results : Female accounted for 98.9%. Grade point average(GPA) ranged from 3.5 to 4.0 (38.8%). Most of the students lived in Gyeonggi (20.4%). Out of 364 students, 58.5% had hospital coordinator certificates and 36.3% had computer related certificatse. Those who studied in Gyeongnam wanted to work in Gyeongnam (90.6%), and those who studied in Seoul wanted to work in Seoul (79.7%). These results revealed the same tendencies in Gangwon(56.8%), Gyeonggi(47.6%) and Jeju(39.3%). Except for Chungbuk and Gyeongnam, most students preferred Seoul as a preferable working location (p<0.000). The reason for the preferable working locations included easy commutation (31.0%), higher income (28.5%), and brand value of hospital (22.5%). Most students chose job for easy commutation (44.8%, p<0.000) and welfare benefits (29.6%). Preference for income ranged from 15,000,000~20,000,000 Korean Won including Daejeon (75.0%), Gyeongnam (59.4%), Chungbuk (58.4%), and Jeju (56.7%). Conclusions : It is necessary to implement the various curricula development including future planning and mastery of foreign language education focused on globalization.

라텍스 장갑의 세척 방법에 따른 세균 감소율 측정

양송이 ( Song Yi Yang ),오정민 ( Jeong Min Oh ),송다혜 ( Da Hye Song ),송보람 ( Bo Ram Song ),강명진 ( Myung Jin Kang ),이명선 ( Myung Sun Lee ),손가연 ( Ga Yeon Son ),오상환 ( Sang Hwan Oh ) 한국치위생학회(구 한국치위생교육학회) 2014 한국치위생학회지 Vol.14 No.4

Objectives : Latex gloves hygiene is the most effective method to prevent infection of microorganisms and to reduce the incidence of cross infections. The aim of this study was to compare the bacteria reduction ratio of cleansing with water, liquid soap and alcohol gauze. Methods : The left side glove was the control group and the right side was the experimental group. The experimental group washed hand with water, soap, and alcohol gauze. The hand plate was inoculated by the hand and inoculated for 24 hours in 35℃. Results : Washing with water showed that CFU of control group was 1116.9 and that of experimental group was 302.8. Hand washing by water reduced 74.3% of bacteria. Liquid soap revealed that CFU of control group was 619.9 and that of experimental group was 8.3. Hand washing by liquid soap reduced 97.5% of bacteria. Alcohol gauze included 875.2 CFU in control group and 5.8 CFU in experimental group. Washing by alcohol gauze reduced 99.5% of bacteria. Conclusions : Based on the results, the most effective latex gloves cleansing method was recommended as the standardized hand washing with the liquid hand soap and alcohol gauze. The results can be used to improve training strategies for enhancing glove hygiene practice in dental clinic.