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, Na-Ri Park 1), Su-Bin Jeon ABSTRACT Objectives: Self perceived body image among women is drawing a lot of attention in Korea due to their unhealthy weight control behaviors. To determine the relationship between self-perceived body image and dietary behaviors among Korean women, the discrepancy between actual body size and body image perception, weight control behaviors were assessed based on age groups using the 2010 KNHANES data.Methods: A total of 1,747 subjects were selected after eliminating those of likely changing their diet recently using the 2010 KNHANES data. The subjects were divided into 3 groups, self-underweight, self-normal, and self-obese according to their perception of body image. The BMI and weight control behaviors were assessed based on age groups according to the body image perception.Results: The younger, the higher ratio of underweight, women perceived their body size as normal or overweight. Exercise and reduced food intakes were dominant among various weight control methods but unhealthy methods were dominant among self perceived overweight group. RESEARCH ARTICLE

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Most sulfonic acid based-membranes come to the limit because of high cost and low performance at low relative humidity (RH). Therefore, we synthesized phosphonic acid functionalized polyaniline (PA-PANI). PANI was used as polymer back bone because of excellent chemical mechanical stability and easy synthesis from relatively cheap monomer, and phosphonic acid presents the relatively high proton conducting in nano-channel without water because of its self dissociation nature. PA-PANI was synthesized by bonding chemically with phosphonic acid groups using 3-bromopropylamine as a reagent. PA-PANI nano-channel membrane showed high and stable conductivities (approximately 0.035 S/cm at 80 to approximately 180 degrees C) under low RH. And PA-PANI nano-channel membranes compared with Nafion (10(-4) S/cm at < 30% RH), have higher proton conductivities. This fact showed phosphonic acid groups were more effective at low RH than sulfonic acid groups. Because the proton conductivity of Nafion decreases considerably at elevated temperature due to dehydration, our low cost membranes using phosphonic acid moiety may be expected to substitute sulfonic acid based-membranes such as Nafion.