• The Journal of Korean Medicine
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• v.31 no.5
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• pp.60-63
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• 2010

Objectives: The purpose was to take a closer look at the fundamental principles of Intense Pulsed Light (IPL) and to investigate its clinical applications for Korean medical fields. Results: IPL is a type of light treatment that is employed by radiating the short-pulse wave, which is transformed from high-intensity light. It may be used to stimulate skin along meridian channels in clinical fields of Korean medicine like acupuncture, moxibustion, cupping therapy, Guasha therapy, and other related traditional techniques. So, it may be feasible to treat not only lentigines, freckles, facial dermatitis, and acne, but also other applications. In addition, it could be recommended for use with herb remedies or herb facial mask packs. Conclusions: IPL may be a plausible method in phototherapy of Korean medicine.

• Korean Journal of Food Science and Technology
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• v.45 no.2
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• pp.248-251
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• 2013

The purpose of this study was to investigate the inactivation effect of intense pulsed light (IPL) on Micrococcus roseus, an irradiation-resistant bacterium isolated from laver, and the commercial feasibility of this sterilization method on dried laver. The inactivation of M. roseus in cultivated plates increased with increasing light intensity and treatment time. Approximately 6.6 log CFU/mL reduction of the cell viability was achieved with IPL treatment for 3 min at 1,000 V of light intensity, tailing was not shown. In addition, the inactivation rate of M. roseus increased with increasing pulse number at same light intensity and treatment time. The killing efficiency for M. roseus increased with by decreasing the distance between the light source and the sample surface.

• Korean Journal of Food Science and Technology
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• v.47 no.1
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• pp.81-86
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• 2015

Intense pulsed light (IPL), a nonthermal technology, has attracted increasing interest as a food processing technology. However, its efficacy in inactivating microorganisms has not been evaluated thoroughly. In this study, we investigated the influence of IPL treatment on the inactivation of Escherichia coli O157:H7 depending on light intensity, treatment time, and pulse number. Increased light intensity from 500 V to 1,000 V, raised the inactivation rate at room temperature. At 1000 V, the cell numbers were reduced by 7.1 log cycles within 120 s. In addition, increased pulse number or decreased distance between the light source and sample surface also led to an increase in the inactivation rate. IPL exposure caused a significant increase in the absorption at 260 nm of the suspending agent used in our experiments. This indicates that IPL-treated cells were damaged, consequently releasing intracellular materials. The growth of IPL-irradiated cells were delayed by about 5 h. The degree of damage to the cells after IPL treatment was confimed by transmission electron microscopy.

• Safe Food
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• v.6 no.3
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• pp.11-16
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• 2011

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.26 no.6
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• pp.29-37
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• 2012

As the demand for the fresh non-thermal food is increased, it is required to develop the fast and perfect sterilization method. The conventional sterilization method using ultraviolet lamp has some disadvantages such as imperfect sterilization and longer process time. In this research, IPL(Intense Pulsed Light) sterilization system is introduced to overcome the drawbacks of the conventional system, and suitable power supply architecture for the system is discussed. Since the IPL sterilization system uses Zenon lamps which requires the 600~2,100[V] for the lightning and 16~30[kV] for the trigger, the converter for the system should be able to generate the high voltage and to discharge the large amount of energy instantaneously. In this research a new power system architecture which has a modified forward converter topology with two switches for generating high voltage and a capacitor bank to control the energy for the lightning by switching is introduced.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.02a
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• pp.228-228
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• 2013

Dye-Sensitized Solar Cells (DSSCs) have attracted great interests as they offer high energyconversion efficiencies at low cost. For the conventional fabrication of DSSCs, high temperature sintering is required for the construction of interconnect $TiO_2$. However, more simplified process which can be applicable to large-sized solar cells module, is strongly necessary for the commercialization of DSSCs. In this work, we developed novel sintering method using Intense Pulsed Light (IPL), which can replace the conventional high temperature sintering methods. The photovoltaic properties of DSSCs utilizing IPL methods will be reported.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.11a
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• pp.131-132
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• 2006

We experimentally demonstrated the synthesis of silicon nanoparticles by using high-density ablation plasma prepared by the interaction of an intense pulsed light-ion beam (LIB) with a target. known as the intense pulsed ion beam evaporation (IBE) method. Light emission was obtained from the silicon nanoparticles. It was determined that the ambient gas reaction is very important and useful method to obtain the photoluminescence from the silicon nanoparticles.

• Electrical & Electronic Materials
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• v.31 no.3
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• pp.20-34
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• 2018

• Korean Journal of Food Science and Technology
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• v.46 no.6
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• pp.778-781
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• 2014

Intense pulsed light (IPL) is a nonthermal technology emerging as an alternative to conventional thermal treatment. The purpose of this study was to investigate the effect of IPL treatment on the microbial inactivation, color alteration, and temperature change of dried laver to evaluate the commercial feasibility of IPL as a sterilization method. IPL treatment (10 min at 1,000 V and 5 pps) resulted in approximately 1.6 log CFU/g decrease in microbial cell viability. After IPL treatment, the surface temperature of dried laver increased by $1.9^{\circ}C$. The color lightness of dried laver increased with increased treatment time, while redness and yellowness decreased. However, these color differences were not significant.

• Food Science and Biotechnology
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• v.18 no.6
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• pp.1537-1540
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• 2009

Enterobacter sakazakii is a representative microorganism whose presence in infant foods can cause serious disease. The purposes of this study were to determine the inactivation effects of intense pulsed light (IPL) on E. sakazakii and the commercial feasibility of this sterilization method. The inactivation of E. sakazakii increased with increasing electric power and treatment time. The cells were reduced by 5 log cycles for 4.6 and 1.8 msec of treatment at 10 and 15 kV of electric field strength, respectively. The sterilization effects on commercial infant foods were investigated at 15 kV. The cell population in an infant beverage, an infant meal, and an infant powdered milk product inoculated with E. sakazakii were inactivated exponentially as a function of time and reduced by 4.0, 2.5, and 1.5 log cycles for 9.4, 7.0, and 7.0 msec of treatment time, respectively.