• 제목/요약/키워드: mosquito

검색결과 243건 처리시간 0.029초

Development of Cost-effective Mosquito Repellent and Distribution Method by Extracting Patchouli Oil

  • KWON, Woo-Taeg;KWON, Lee-Seung;YOO, Ho-Gil;LEE, Woo-Sik
    • 산경연구논집
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    • 제10권12호
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    • pp.15-23
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    • 2019
  • Purpose : We will develop the distribution method of wide oil extract technology to develop repellent using this technology and study mosquito repellent persistence. Research design, data and methodology : A positive control group containing purified water, ethanol and picaridin was prepared, and the experimental control group was prepared in the same proportion as the positive control group, and 0.6% of broad oil was added. The results were summarized using the calculation method according to the avoidance effect and statistically tested by t-test using the excel statistics program. Results : Experiments on skin surface area and voice control of participants showed that men had 8.9% wider skin surface area than women, and voice control tests showed that women were bitten by mosquitoes five times more than men. Both the positive and the experimental control groups had a valid duration of up to three hours, but from the time of five hours, the positive control group had 77% and the experimental control had 90%, indicating a difference of 14.4% over the positive control group. Conclusions : The mosquito repellents developed in this study on the basis of safety and continuity are cost-effective in terms of mosquito repellent, and in addition fragrance, odor removal, perfume, ink, skin care and massage effect.

Seasonal Prevalence and Abundance of Mosquitoes at the Busan Port (2001~2006)

  • Kim, Mi-Kyeong;Lee, Eun-Ju
    • 대한임상검사과학회지
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    • 제44권4호
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    • pp.199-204
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    • 2012
  • The purpose of this study is to examine the population density of the mosquito species, and to provide the basic data related to vector mosquitoes to manage the possible epidemic diseases. During a 4-year investigation (2001, 2002, 2004, and 2006), we collected the specimens of the mosquitoes at pier no. 1, 3 and 5 of Busan port with light traps from sunset until the next day morning from April to October each year. Through the research, we collected 5,985 mosquito specimens in total and found 7 mosquito species belonging to 3 genera. A total of 1,575, 1,473, 1,478 and 1,459 mosquito specimens were collected in 2001, 2002, 2004 and 2006, respectively. Among them, 5,568 (93.0%) specimens were Culex pipiens pallens, the West Nile virus infection vector, which showed the highest density among the specimens. The population densities of the other species were: 295(4.9%) Culex tritaeniorhynchus, 94(1.5%) Aedes togoi, 12(0.3%) Aedes albopictus, 10(0.2%) Anopheles sinensis, 4(0.1%) Aedes vexans nipponii, 2(0.1%) Culex inatomii. The monthly abundance of mosquitoes from July through September showed the highest values. Although it was a general mosquito monitoring study, this study could provide a base for securing the statistical data on spreading epidemic diseases by people infected outside Korea.

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세종특별자치시 전역과 구도심 및 신도심에 따른 모기 밀도 비교 연구 (A comparative study of mosquito population density according to the Sejong City areas and old city and new city)

  • 나수미;도지선;양영철;유성민;이훈복
    • 환경생물
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    • 제39권3호
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    • pp.362-373
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    • 2021
  • 본 연구는 모기 매개체 감염병 예방을 위한 방역사업의 계획수립을 위하여 세종시의 모기 밀도 및 서식환경을 분석하여 방역 가이드라인 기초자료를 확립하는 것을 목적으로 수행되었다. 세종시 전반적인 모기분포 현황 조사를 위해 2019년 8월~10월까지 MOSHOLE과 유문등을 사용하여 일주일에 1회 1박2일 간의 모기 개체수를 조사하였으며, 구도심(조치원읍)과 신도심(보람동)의 밀도차 분석을 위해 2020년 4월~10월까지 DMS를 활용하여 매일의 모기 개체수를 조사하였다. 연구 결과 금남면에서 가장 많은 모기가 포집되었으며 서식하는 우점 모기 종은 큰검정들모기, 빨간집모기인 것으로 나타났다. 모기 개체수에 영향을 미치는 토지피복 유형은 산림지역과 초지지역으로 나타났다. 질병 매개 가능성이 있는 모기 종 분석 결과 연서면과 금남면에서 다수 발견되었으며, 흰줄숲모기, 얼룩날개모기류, 작은빨간집모기 순서로 확인되었다. 각각 CO2와 빛을 유인제로 사용하는 MOSHOLE과 유문등의 채집효율을 비교 분석한 결과, CO2의 유인률이 높아 모기 포집 효율성과 생태계 안정성 보존을 위해 CO2를 유인제로 사용하는 것이 적합한 것으로 나타났다. 세종시의 모기 개체수는 구도심이 신도심보다 약 2배 정도 개체수가 많은 것으로 나타났다. 세종시는 구도심과 신도심으로 나누어져 있기 때문에 획일적인 방식으로는 눈에 띄는 방역 효과를 보기가 어려우며 효과적인 방역을 위해서는 방역의 차별성을 두어야 할 것으로 사료된다. 본 연구는 세종시의 통합적인 모기 방제 가이드라인의 기초작업으로 이루어졌으며, 본 연구의 결과로 모기를 매개로 하는 질병 확산을 제어하고, 모기로부터의 피해를 줄이는 데 일조하기를 바란다.

Isolation of a Potent Mosquito Repellent from Vitex negundo L.: An Alternative Source of Rotundial

  • Amancharla, Praveen K.;Muthuraj, Patrick S.;Rao, Gottumukkala V.;Singh, Om V.
    • Natural Product Sciences
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    • 제5권2호
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    • pp.104-106
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    • 1999
  • The chloroform fraction of the aqueous extract of the fresh leaves of Vitex negundo by bioactivity guided isolation yielded a pure compound, rotundial (1) which has shown potent mosquito repellent activity. Using spectral data (UV, IR, $^1H\;&\;^{13}C$ NMR and MS) its structure has been elucidated.

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암모기 흡혈과정에 대한 실험적 연구 (Experimental research on blood sucking phenomena of a female mosquito)

  • 김보흠;이정엽;이상준
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2008년도 추계학술대회A
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    • pp.1475-1478
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    • 2008
  • We have investigated the blood sucking phenomena of a female mosquito. The main objective of this study is to understand the mosquito's blood sucking mechanism and eventually to develop a bio-mimic technology that can be used to resolve the problem encountered in the transport of infinitesimal biological fluids in various bio-chips and microchips. At first, the consecutive velocity fields of blood-sucking flow in a proboscis were measured using a micro-particle image velocimetry (PIV) system employed with a high-speed camera. The velocity signals of the blood-sucking flow in the proboscis represent a periodic pulsatile flow pattern and spectral analysis on the velocity waveform shows a clear peak at 6.1 Hz.

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Cyanobacterium Synechocystis PCC6803 내에서 Bacillus thuringiensis sunsp. morrisoni PG-14 cryIVD 유전자의 발현

  • 이대원;박현우;진병래;정영호;박영목;강석권
    • 한국미생물·생명공학회지
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    • 제24권2호
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    • pp.173-177
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    • 1996
  • Bacillus thuringiensis subsp. morrisoni PG-14 is a gram-positive soil bacterium producing mosquitocidal parasporal inclusions composed of several crystal proteins. Among these crystal protein genes, cryIVD gene is one of major component which has 72 kDa in size. However, these parasporal inclusions sink quickly from the surface of water where mosquito larval feeding occurred. To develope mosquitocidal cyanobacterium, therefore, we constructed the expression vector, pCYASK 5-1 harboring cryIVD gene. The expression vector, pCYASK5-1 was transformed into the cyanobacterium Syne- chocystis PCC6803 reported as a natural mosquito larval food source and the transformants were selected with kanamycin. Expression of IVD gene in transformant was characterized by SDS-polyacrylamide gel electrophoresis (PAGE) and immunoblot analysis. The mosquitocidal activity of a transformant was determined with Culex tritaeniorhynchus. The results showed that, the transformed cyanobacterium is toxic to mosquito larvae and will be expected as a potential agent that is used for mosquito control.

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화재사례를 통한 전자 모기향의 발화특성에 관한 연구 (A Study on the Ignition Characteristics of the Electric Mosquito Repellent Mat)

  • 최재성;최승복;민세홍;최돈묵
    • 한국화재소방학회논문지
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    • 제23권5호
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    • pp.196-205
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    • 2009
  • 전자모기향 매트는 배선피복의 손상, 반단선, 과부하 및 트래킹 등 다양한 원인에 의하여 발화 할 수 있다. 본 연구에서는 전자모기향 매트의 구조, 발열체인 PTC서미스터(Positive temperature coefficient thermistor) 및 화재현장에서 수거한 전자모기향 매트 잔해의 현상학적 특징을 관찰하고 동일 제품의 PTC 서미스터를 재현 발화 실험을 한 후 각각에 대하여 비교 분석한 결과 발열판의 용융형태와 PTC서미스터의 파열형태 등이 동일하다는 것을 확인하였다.

Mosquito 겸자를 이용한 Brock 술식의 단기 성적 -중증 폐동맥유출로차단을 동반한 신생아 4예- (Surgical Results of Brock Operation with a Mosquito Clamp in Neonates)

  • 안홍남
    • Journal of Chest Surgery
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    • 제22권5호
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    • pp.766-774
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    • 1989
  • Four neonates with critical pulmonary outflow obstruction underwent emergency palliative operation between February 1988 and May 1989 at the department of Thoracic and Cardiovascular Surgery, Kyungpook National University Hospital. There were three boys and one girl, the mean age was 12.25 days [ranging from 3 days to 26 days], and the mean body weight was 3,625 gm [ranging from 3,450 gm to 4,200 gm]. Two patients had severe pulmonic valvular stenosis with intact ventricular septum, a third had pulmonary atresia with intact ventricular septum, and another had pulmonary atresia with ventricular septal defect. All were cyanotic, showed arterial desaturation with metabolic acidosis, and had congestive heart failure. To relieve the pulmonary outflow tract obstruction, we performed transventricular pulmonary valvulotomy [Brock operation] with a mosquito clamp in all cases without extracorporeal circulation. Three patients survived the operation and showed satisfactory postoperative results. The patient who had pulmonary atresia with ventricular septal defect expired 5 days after surgery. We consider transventricular pulmonary valvulotomy [Brock operation] with a mosquito clamp as one of the preferable procedures for critical pulmonary outflow obstruction in the neonatal period.

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수질 측정 성분이 모기 활동 지수에 미치는 영향 (Effects of Water Quality Measurement on Mosquito Activity Index)

  • 김성진;이승우
    • 한국컴퓨터정보학회:학술대회논문집
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    • 한국컴퓨터정보학회 2023년도 제67차 동계학술대회논문집 31권1호
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    • pp.165-166
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    • 2023
  • 물환경정보시스템에서 하천의 수질을 측정한 자료를 대상으로 DMS(Digital Mosquito Monitoring System)가 설치된 위치와 수질 측정지 위치가 가까운 4개 지점에 대한 수질 측정 성분과 모기지수의 연관성을 분석하였다. 수질 기준 외 측정 성분과 모기지수의 상관관계는 총질소(T-N), 용존총질소(TDN), 인산염인이 연관성이 높은 것으로 나타났다. 이 중에서 인산염인은 모기지수와 양적 선형관계를 이루는데, 인산염은 수중에 부영양화를 일으키는 성분 중 하나다. 수질 측정지는 비료의 영향보다는 오수의 유입으로 인산염이 과잉공급되는 것으로 보였다. 따라서 매년 바뀌는 모기지수 산출식의 지연일자 데이터에 부영양화 지수를 넣음으로써 모기지수의 정확도를 보완할 수 있을 것으로 판단된다.

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