• Journal of Sensor Science and Technology
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• v.22 no.3
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• pp.202-206
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• 2013

In this paper, a disposable glucose sensor was made of paper. Glucose sensor strip using carbon electrode is appropriate for the low price ones because it requires cheap materials and low cost production. Most of blood glucose sensors were developed with plastics, but it causes pollution problems. Therefore we developed disposable carbon electrode glucose sensor using paper. This sensor consists of upper and bottom plate. On the upper plate, three-dimensional channel are formed through pressing process. The fabricated paper glucose sensor shows relatively short sensing time of about 5seconds, excellent reproducibility ($R^2$=0.9558), and fabrication yield as well.

• Journal of Biosystems Engineering
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• v.37 no.3
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• pp.209-213
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• 2012

Purpose: This study was performed to develop a simple, disposable thin-film optical nitrate sensor. Methods: The sensor was fabricated by applying a nitrate-selective polymer membrane on the surface of a thin polyester film. The membrane was composed of polyvinylchloride (PVC), plasticizer, fluorescent dye, and nitrate-selective ionophore. Fluorescence intensity of the sensor increased on contact with a nitrate solution. The fluorescence response of the optical nitrate sensor was measured with a commercial fluorospectrometer. Results: The optical sensor exhibited linear response over four concentration decades. Conclusions: Nitrate ion concentrations in plant nutrient solutions can be determined by direct optical measurements without any conditioning before measurements.

• Journal of Sensor Science and Technology
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• v.15 no.5
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• pp.352-356
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• 2006

In this paper, we developed enzyme electrode of a new form to improve performance of disposable glucose sensor. We could fabricate electrode of Cu/Ni/Au structure which has very low electrical resistance (0.1 $\Omega$) by sticking copper film to plastic film with laminating method and electro-plated nickle and gold on it. The enzyme electrode was completed by immobilizing enzyme on the fabricated electrode. The fabricated glucose sensor has very quick sensing time as 3 seconds, and excellent reproducibility, fabrication yield as well.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.07b
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• pp.950-952
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• 2003

This paper have been studied fabrication and characteristics of disposable pH sensor using MEMS technology. The sensor has two open-well structure, the container for the internal electrolyte and electrode were formed by anisotropically etching a silicon substrate. unlike currently used KCI saturated solution, the structure was introduced hydrogel which take an advantage of miniaturization, bulk product, a low price. PU and CA/TP used to measurement ion detection, one is reference membrane and the other is pH. fabricated sensor is encapsulated entirely with epoxy, finally sensor was estimated various ion sorts and pH ranges.

• Fashion & Textile Research Journal
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• v.6 no.3
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• pp.341-346
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• 2004

The situation of wearing of surgery gown and their awareness were surveyed to clinicians and nurses in operation rooms of major university hospitals in the country to develop and manufacture surgery gowns for medical personnels. The survey result was quantified to be used as a base data for design of surgery gowns with freshness and convenience as well as safety to wearers. In the inspection of surgery gowns focused on materials (cotton raw material and disposable nonwoven) and dissatisfaction, there was no significance in the activity and freshness with p-0.745 and p-0.367, respectively, however, there was a significance in safety and management with p-0.011 and 0.049, respectively: disposable nonwoven gown showed higher satisfaction level in safety and management compared to cotton gowns.

• 한국생물공학회:학술대회논문집
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• 2002.04a
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• pp.103-106
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• 2002

A gradient LC/MS system was constructed and applied for separation of biological samples. For example, a rapid and simple analytical method without pretreatment based on gradient ${\mu}LC/MS$ with a disposable microcolumn has been developed to determine B group vitamins in urine. Urine samples were directly injected to the disposable home-made microcolumn. The microcolumn can be emptied after being used for a series of urine samples, and repacked with fresh stationary phase. An overdose of vitamin pills were swallowed by healthy volunteers and the urine samples were taken 1,2,3,5, and 8 hours after swallowing. Vitamins immediately showed up in urine, hit the maximum, and disappeared swiftly. This technique is expected to have some application for clinical purposes.

• Journal of the Korean Society of Clothing and Textiles
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• v.28 no.3_4
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• pp.491-498
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• 2004

Among the components of disposable diaper, the top sheet contacting with baby skin directly is usually made of nonwoven fabrics. Therefore, the tactile properties of the nonwoven fabrics are important for the skin health of infants. In this study, we have explored the surface properties of hygiene nonwoven fabrics (100% cotton spunlace, 100% tencel spunlace, 100% polypropylene (PP) thermalbonding and 100% PP Thru-air bonded carded web (TABCW)), such as friction coefficient and geometrical roughness. used by KES-F system and a laser displacement sensor. Also, we evaluated the subjective responses about the hygiene nonwoven fabrics used by a questionnaire and compared with the objective values, measured by KES-F system and a laser displacement sensor respectively. From the result, we have found that surface sensation (such as soft, smooth, and rough) and bulkiness sensation (such as spongy and fluffy) of nonwovens were represented excellently by L-SMD values which are measured by a laser displacement sensor.

• Bulletin of the Korean Chemical Society
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• v.34 no.4
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• pp.1175-1180
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• 2013

A microfabricated electrochemical cell comprising PDMS-based microchannel and in-channel gold microelectrodes was fabricated as a sensitive and a miniature alternative to the conventional electroanalytical systems. A reproducible fabrication procedure enabled patterning of multiple microelectrodes integrated within a PDMS-based fluidic network. The active area of each electrode was $200{\mu}m{\times}200{\mu}m$ with a gap of $200{\mu}m$ between the electrodes which resulted in a higher signal to noise ratio. Also, the PDMS layer served the purpose of shielding the electrical interferences to the measurements. Analytes such as potassium ferrocyanide; amino acid: cysteine and nucleoside: guanosine were characterized using the fabricated cell. The microchip was comparable to bulk electrochemical systems and its applicability was also demonstrated with flow injection based rapid amperometric detection of DNA samples. The device so developed shall find use as a disposable electrochemical cell for rapid and sensitive analysis of electroactive species in various industrial and research applications.

• Journal of the Korean Home Economics Association
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• v.33 no.3
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• pp.255-264
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• 1995

This study was the designed to measure skin irritation caused by clothing at free foraldehde have caused a substantial number of cases of dermatitis type. Free formaldehyde levels were observed in infant's sanitatized goods9disposable diapers, cotton-diapers and under wear etc.) at 1992, 1994. The amount of free formaldehyde was measured by means of Acetyle Acetone method(KS K 0611). As the resort, underwear generally gave the highest free formaldehyde level, but disposable diapers and cotton diapers showed the lowest level. The formaldehyde level in intan's clothing lowered in 1994 than 1992, after the enforcement of the level in intant's clothing lowered in 1994 than 1992, after the enforcement of the formaldehyde level control. it was found that 38.7% of infant's sanitatized goods still exceeded th controlled level(A-Ao : 0.05) In the future, research to lower the amount of formaldehyde released form fabrics will also lead to decreased incidence of garment formaldehyde sensitivity. The possibility of a consumer suffering is being in convenienced form a textile-related skin problem will be even lower than it has been in the past.

• East Asian Economic Review
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• v.19 no.4
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• pp.381-408
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• 2015

This paper investigates a link between the significant decline in the growth of domestic demand and the dampened ripple effects from the export sector in Korea since the East Asian financial crisis. The dampened ripple effects are closely linked to the changed investment behaviors of the Korean large-sized exporting firms since the crisis: they do not invest in their export earnings any more to create new industries; they tend to use more foreign value added contents for their exports and to increase outward direct investment by actively participating in global value chains. The paper also examines a link between the growth of domestic demand and the growth of household disposable income and presents reasons for the decline in the growth of household disposable income since the East Asian financial crisis.