• 한국전자통신학회논문지
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• 제10권6호
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• pp.729-736
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• 2015

본 연구는 표면에 사업자명과 전화번호가 인쇄되어 있는 일회용라이터를 수집하여 기원지를 추정하였다. 낙동강 하구 사주 해안 2곳(진우도, 신자도)과 거제도 해안 3곳(두모몽돌해수욕장, 흥남해수욕장, 여차몽돌해해수욕장)을 2012년 2월부터 2013년 12월까지 격월로 모니터링을 시행한 결과, 총 166개의 라이터를 수집하였다. 시기적으로 6월, 8월에 가장 많은 발생률을 보였으며, 연구지역에 유입된 일회용라이터의 기원지는 대부분 인구밀도가 높은 낙동강 유역 지역 및 연안지역이었다.

• Bulletin of the Korean Chemical Society
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• 제31권11호
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• pp.3128-3132
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• 2010

A disposable solid-state pH sensor was realized by utilizing two nanoporous Pt (npPt) electrodes and a copolyelectrolytic junction. One nanoporous Pt electrode was to measure the pH as an indicating electrode (pH-IE) and the other assembled with copolyelectrolytic junction was to maintain constant open circuit potential ($E_{oc}$) as a solid-state reference electrode (SSRE). The copolyelectrolytic junction was composed of cationic and anionic polymers immobilized by photo-polymerization of N,N'-methylenebisacrylamide, making buffered electrolytic environment on the SSRE. It was expected to make. The nanoporous Pt surrounded by a constant pH excellently worked as a solid state reference electrode so as to stabilize the system within 30 s and retain the electrochemical environment regardless of unknown sample solutions. Combination between the SSRE and the pH-IE commonly based on nanoporous Pt yielded a complete solid-state pH sensor that requires no internal filling solution. The solid state pH sensing chip is simple and easy to fabricate so that it could be practically used for disposable purposes. Moreover, the solid-state pH sensor successfully functions in calibration-free mode in a variety of buffers and surfactant samples.

• Membrane and Water Treatment
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• 제14권4호
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• pp.181-189
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• 2023

The Covid-19 pandemic has increased demand for chlorine-based sanitizing solutions, most of which contain hypochlorous acid (HOCl) as an active agent. Free chlorine (HOCl) in these sanitizers is crucial for their efficacy. Disposable test strips are affordable and convenient tools for determining various qualitative and quantitative parameters. In this study, disposable opto-chemical test strips were developed by physically immobilizing 3,3',5,5'-tetramethylbenzidine (TMB) and o-dianisidine (o-D) reagents on chromatography and filter paper-based test strips for the visualization and detection of free chlorine in the form of HOCl. The reagents undergo a rapid color change upon reaction with chlorine through a redox reaction. The paper-based test strips showed rapid color change within a minute and a low sample volume requirement (1 ml). This portable, disposable paper-based test strip is a simple and cost-effective way to rapidly detect the presence of HOCl sanitizers for home and field applications. Both TMB and o-D successfully detected chlorine. Chromatography paper proved to be the more efficient option among the two papers used as substrates for the reagents (TMB and o-D). It exhibited high retention capacity and high performance in terms of color transformation when reacting with HOCl, even after two months of storage.

• 대한가정학회지
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• 제37권7호
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• pp.29-43
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• 1999

The purpose of this study was to develop disposable diapers for the elderly in need by experimenting with wearing disposable diapers and analyzing the properties of materials of these diapers. The diapers were of two different types: one was a panty type for the elderly who were bed ridden, and the other was a pad type for the elderly who had incontinence. The subjects for the wearing test of the panty type were forty who were bed ridden, and there were forty subjects for the wearing test of the pad type who had incontinence. The disposable diapers for these experiments were chosen from those already found in the market place. Four panty types and three pad types were selected. From these experiments for the disposable diapers, the first prototypes were developed, and the second prototypes were proposed by experimenting with the first prototypes. The first panty prototype was designed to improve absorbing power, and we added waist rubber bands to prevent evacuation from back leaking and a frontal tape to prevent waistline film from tearing. The first pad prototype was designed to improve absorbing power also, and we added side rubber bands to prevent the side leaking and an adhesive tape on the fore part of the bottom to prevent the diapers from moving, and made the outline of the back area curved and thin to help hide the diaper from detection thus making the wearer feel better. From these test cases and analyzing the properties of materials with the first prototypes, we gained some success, but several points on further improvements were proposed to refine the final prototypes. The second panty prototype we proposed was to make 1he length longer, especially in the crotch area to prevent excess leaking and to fit the body more snugly. Also, the second pad prototype was proposed to reduce the total thickness of the diaper, and to improve the feeling and appearance.

• 대한임상검사과학회지
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• 제48권3호
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• pp.237-241
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• 2016

2016년 4월부터 6월까지 제주특별자치도에 위치한 대중음식점, 커피전문점 및 제과 제빵점 등에서 제공하는 일회용 물티슈를 대상으로 미생물의 오염도를 평가하였다. 사용된 재료는 일회용 물티슈 55종을 사용하였다. 대중음식점 일회용 물티슈 55종의 평균 세균 수는 $4.14{\times}10^3CFU/mL$이었으며, 세균이 자라지 않은 물티슈는 5종이었다. 가장 높게 측정된 세균 수는 2종의 물티슈에서 $16.67{\times}10^3CFU/mL$ 이상으로 나타났다. 순수 분리한 총 균수는 71균주이며, 이 중 황색포도알균(Staphylococcus aureus) 15균주, 녹농균(Pseudomonas aeruginosa) 3균주를 동정하였다. 이는 대중음식점에서 공급하는 물티슈의 세균 오염도가 심각하다는 것을 반영하며 기회감염의 원인이 되는 Staphylococcus aureus와, Pseudomonas aeruginosa가 발견된 것은 주목할 만하다고 볼 수 있다. 본 연구를 통해 한 번 사용 후 버리는 일회용품이며, 수개월 내지는 1~2년 보관하면서 사용하는 제품인 일회용 물티슈의 위생관련 기준 마련에 기초자료를 제공하고 대중음식점 등에 대한 위생관리 감독 강화와 개선방안 및 개인 위생관리 및 국민보건 수준향상에 기여 하고자 한다

• 감성과학
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• 제17권2호
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• pp.77-84
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• 2014

월경은 모든 여성에게 불가피한 현상으로 이 기간에 이르는 불편의 경감은 여성의 풍요로운 삶을 위한 중요한 과제이다. 본 연구에서는 일회용과 다회용 패드 생리대의 소비자 사용평가를 통하여 생리대 사용에 따른 실질적인 문제점을 파악하고 소비자의 니즈에 맞게 개선하기 위한 기초 정보를 제공하는 데 목적을 두었다. 연구결과, 월경에 대한 응답자의 증상은 긍정보다는 부정적인 측면이 우세하여 생리기간이 고통스러운 경험으로 인식되고 있었으며 일회용 생리대와 다회용 생리대의 디자인, 성능, 맞음새, 사용감, 관리에 대한 긍정적, 부정적 평가 내용에 차이가 있었다, 스왓분석을 통해 일회용 생리대는 사용 편리성이 강점인 반면, 착용감이 약점으로, 다회용 생리대는 착용감이 강점인 반면, 관리 불편이 약점으로 제기되었다. 이러한 결과를 반영한 감성 설계가 이루어진다면 소비자는 보다 쾌적한 생리 기간을 영위할 수 있으며 궁극적으로 생산업체에 수익을 가져오는 상승효과를 불러올 수 있으리라 기대한다.

• 한국의류학회지
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• 제28권8호
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• pp.1175-1185
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• 2004

This study evaluated thermo-physiological and subjective properties of improved disposable coveralls for railroad carriage maintenance through climatic chamber trials and a filed study. Subjects wore five kinds of disposable coveralls (Type A: a disposable coverall on the market, Type B: a coverall with an improved hood and size-adjustable design, Type C: a coverall with a portable hood, Type D: a coverall with small holes for ventilation, Type E: a sleeveless coverall, Type F: a separated type of coverall with half sleeves) The air temperature in the climatic chamber was set in 9$^{\circ}C$ and 30$^{\circ}C$ For each condition, subjects simulated the railroad work for 120min. and rectal temperature, skin temperatures, clothing microclimate and subjective sensations were measured. The results of chamber trials showed rectal temperature and clothing microclimate did not display significant differences by clothing type. In 30$^{\circ}C$ air temperature, mean skin temperature was higher in Type E and Type F than in Type A(p＜0.05) but between the improved coveralls(B-F), we could not find any significant difference. In the case of thermal comfort, the most preferred types were Type B and Type C in 9$^{\circ}C$ and Type F in 30$^{\circ}C$. All subjects felt more comfortable in the improved coveralls than in coveralls of the market (Type A). In field study, workers preferred Type B, Type C and Type F to Type A but the most favorite type differed by the specific type of work. Especially, workers were dissatisfied that Type D tore easily due to lots of small holes around the armpits and Type I did not protect workers＇ shoulder and arms from oil contamination. According to the climatic chamber trials and field study, the most effective coveralls were Type B and Type C for winter and Type F for summer.

• Journal of Korean Biological Nursing Science
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• 제21권2호
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• pp.133-140
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• 2019

Purpose: The purpose of this study was to check the degree of residual microbial contamination after disinfection of reusable suction containers, used in an intensive care unit (ICU) and present basic data for efficient use through cost analysis in comparison to disposable suction containers. Methods: This study was conducted on 32 reusable suction containers used in an ICU on a selected specific day. After disinfection and washing, specimens were collected from the used containers and cultured to check for microbial contamination. Additionally, a comparative narrative study analyzes the cost of using reusable suction containers and disposable suction containers. Data were analyzed with the SPSS WIN 20.0 program using real numbers and percentage ${\chi}^2$-test. Results: As a result of the study, microorganisms were found in all samples where in 30 were gram-positive (62.5%) while 13 were gram-negative (27.1%). Based on level of contamination, microorganisms were less than 10CFU/ml in 18 samples (56.3%); 11-99CFU/ml in six samples (18.8%); and more than 100CFU/ml in eight samples (25%). Cost per day for a reusable suction container was $10,655+{\alpha}$ while cost per day for a disposable suction container was 10,666 won. Conclusion: This study found that reusable suction containers, even after disinfection, accounted for factors of potential infection as well as microbial contamination. So, disposable suction containers are superior in cost-effectiveness and highly efficient for use with infected patients.

• 한국생산제조학회지
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• 제22권2호
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• pp.235-240
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• 2013

This paper presents a disposable microfluidic infusion pump using the restoring force of elastomeric membrane of Polydimethylsiloxane. Microfluidic infusion pump consists of hydraulic resistance control part, elastomeric blister actuator part, drug inlet and outlet. Expanded elastomeric blister actuator continuously pushes liquid in the chamber to outlet. At same time, microchannel diameter near the outlet was controlled by thin elastomeric membrane in hydraulic resistance control part. Eventually flow rate of infused liquid is controlled by air pressure. In experimental study, the amount of the filled liquid in the blister is precisely controlled by the height of the blister. Flow rate of infused liquid could be controlled, that is, controlled release of the drug over time was possible by adjusting hydraulic resistance and restoring pressure with the blister actuator.

• 센서학회지
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• 제16권6호
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• pp.449-456
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• 2007

The work described in this study concerns the development of a disposable amperometric sensor for the electrochemical detection of a well-known aqueous pollutant, free available chlorine (FAC). The FAC sensor developed used screen printed carbon electrodes (SPCEs) coupled with immobilised syringaldazine, commonly used as an indicator in photometric FAC detection, which was directly immobilised on the surface of SPCEs using a photopolymer PVA-SbQ. To enable in-field analysis of FAC, a prototype hand-held electrochemical analyzer has been developed to withstand the environment with its rugged design and environmentally sealed connections; it operates from two PP3 (9 volt) batteries and is comparable in accuracy and sensitivity to commercial bench top systems. The sensitivity of the FAC sensor developed was $3.5{\;}nA{\mu}M^{-1}cm^{-2}$ and the detection limit for FAC was found to be $2.0{\;}{\mu}M$.