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Effect of pulverizing method on the particle size of matured silkworm powder
Kim, Su-Bae,Kim, Kee-Young,Ji, Sang-Deok,Kim, Seong-Wan,Kim, Nam-Suk,Jo, You-Young,Kim, Jong-Gil,Kim, Young-Guk,Koo, Hui-Yeon,Moon, Hyung-Chul,Seok, Young-Seek,Lee, Hyun-Tai Korean Society of Sericultural Science 2018 International Journal of Industrial Entomology Vol.37 No.2
Recently matured silkworm powder was developed by RDA. In this study, the effect of pulverizing method on the particle size of matured silkworm powder was examined. FESEM was performed to observe the morphology and to measure the particle size of silkworm powder. Particle morphology of air-jet mill pulverized powder was round and smooth, however, those of roller-mill and hammer-mill pulverized mature silkworm was more harsh and square. Particle size was varied with pulverizing technique as follows; $1.1{\mu}m$ (air-jet mill), $10{\mu}m$ (roller mill), and $120{\mu}m$ (hammer mill), respectively. A proximate analysis results of air-jet mill powder showed that crude protein, crude lipid, crude fiber, and ash was 73%, 12%, 1.95%, and 3.4%, respectively. According to our results, air-jet mell technique might be used to make a tiny matured silkworm powder.
Effect of pulverizing method on the particle size of matured silkworm powder
( Su-bae Kim ),( Kee-young Kim ),( Sang-deok Ji ),( Seong-wan Kim ),( Nam-suk Kim ),( You-young Jo ),( Jong-gil Kim ),( Young-guk Kim ),( Hui-yeon Koo ),( Hyung-chul Moon ),( Young-seek Seok ),( Hyun- 한국잠사학회 2018 International Journal of Industrial Entomology Vol.37 No.2
Recently matured silkworm powder was developed by RDA. In this study, the effect of pulverizing method on the particle size of matured silkworm powder was examined. FESEM was performed to observe the morphology and to measure the particle size of silkworm powder. Particle morphology of air-jet mill pulverized powder was round and smooth, however, those of roller-mill and hammer-mill pulverized mature silkworm was more harsh and square. Particle size was varied with pulverizing technique as follows; 1.1 μm (air-jet mill), 10 μm (roller mill), and 120 μm (hammer mill), respectively. A proximate analysis results of air-jet mill powder showed that crude protein, crude lipid, crude fiber, and ash was 73%, 12%, 1.95%, and 3.4%, respectively. According to our results, air-jet mell technique might be used to make a tiny matured silkworm powder.
Kim, Hyeoi-Jin,Kim, Chul-Hyun,Kim, Dong-Won,Park, Mi-Ra,Park, Hye-Soon,Min, Sun-Seek,Han, Seung-Ho,Yee, Jae-Yong,Chung, So-Chung,Kim, Chan The Korean Nutrition Society 2011 Nutrition Research and Practice Vol. No.
Bioelectrical impedance analysis (BIA) models must be validated against a reference method in a representative population sample before they can be accepted as accurate and applicable. The purpose of this study was to compare the eight-electrode BIA method with DEXA as a reference method in the assessment of body composition in Korean adults and to investigate the predictive accuracy and applicability of the eight-electrode BIA model. A total of 174 apparently healthy adults participated. The study was designed as a cross-sectional study. FM, %fat, and FFM were estimated by an eight-electrode BIA model and were measured by DEXA. Correlations between BIA_%fat and DEXA_%fat were 0.956 for men and 0.960 for women with a total error of 2.1%fat in men and 2.3%fat in women. The mean difference between BIA_%fat and DEXA_%fat was small but significant (P < 0.05), which resulted in an overestimation of $1.2{\pm}2.2$%fat (95% CI: -3.2-6.2%fat) in men and an underestimation of $-2.0{\pm}2.4$%fat (95% CI: -2.3-7.1%fat) in women. In the Bland-Altman analysis, the %fat of 86.3% of men was accurately estimated and the %fat of 66.0% of women was accurately estimated to within 3.5%fat. The BIA had good agreement for prediction of %fat in Korean adults. However, the eight-electrode BIA had small, but systemic, errors of %fat in the predictive accuracy for individual estimation. The total errors led to an overestimation of %fat in lean men and an underestimation of %fat in obese women.
Kim, Tae-Sung,Kim, Chang-Yeong,Lee, Hae-Kyung,Kang, Il-Hyun,Kim, Mi-Gyeong,Jung, Ki-Kyung,Kwon, Yong-Kwan,Nam, Hye-Seon,Hong, Soon-Keun,Kim, Hyung-Sik,Yoon, Hae-Jung,Rhee, Gyu-Seek Korean Society of ToxicologyKorea Environmental Mu 2011 Toxicological Research Vol.28 No.3
Screening of estrogenic activity on dichloro diphenyl trichloroethane (DDT), dichloro diphenyl dichloro ethylene (DDE), dieldrin, heptachlor, aldrin, chlordane, lindane, polybrominated diphenyl ethers (PBDE) and parabens was compared using Organization for Economic Cooperation and Development (OECD) test guideline 455 (TG455). The estrogenic activity of DDT was 58,000-fold ($PC_{50}$, $1.67{\times}10^{-6}$ M) less than $17{\beta}$-estradiol($E_2$) ($PC_{50}$, $2.88{\times}10^{-11}$ M) but DDE, dieldrin, heptachlor, aldrin, chlordane, lindane and PBDE did not show any estrogenic activity in this assay system. In the case of paraben compounds, the rank of relative transcriptional activation (logRTA) was butyl paraben -1.63752 ($PC_{50}$, $1.25{\times}10^{-7}$ M) > isobutyl paraben -2.34008 ($PC_{50}$, $6.3{\times}10^{-7}$ M) > ethyl paraben -2.64016 ($PC_{50}$, $1.26{\times}10^{-6}$ M) > isopropyl paraben -2.73993 ($PC_{50}$, $1.58{\times}10^{-6}$ M) > propyl paraben -2.84164 ($PC_{50}$, $2.0{\times}10^{-6}$ M). Our data suggest that OECD test guideline TG455 may be useful as a screening tool for potential endocrine disruptors.
Prediction of stress–strain behavior of spirally confined concrete considering lateral expansion
Kim, Young-Seek,Kim, Sang-Woo,Lee, Jung-Yoon,Lee, Jae-Man,Kim, Hyeong-Gook,Kim, Kil-Hee Elsevier 2016 Construction and Building Materials Vol.102 No.1
<P><B>Abstract</B></P> <P>This paper proposes a new analytical model for the relationship between the axial and transverse strains of confined concrete in uniaxial compression. The proposed model was developed based on empirical data for a circular section confined by spirals. A column with a circular section and subjected to uniaxial compression was considered. The proposed model predicts the stress in the transverse confinement reinforcement to estimate the relationship between the axial strain of the column and tensile strain of the transverse confinement reinforcement. The model can also produce the axial stress–strain relationship of the confined concrete of the column. The predicted axial and transverse strains of the confined concrete section corresponded to the observed axial peak stress of a column evaluated in previous research with good accuracy. This model will be an effective tool for investigating the effect of circular spirals on the structural behavior of confined concrete and enhancing the accuracy of structural behavior analysis for a column under uniaxial compression.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new approach for evaluating confinement effect of confined concrete. </LI> <LI> Study of axial–transverse behavior of confined concrete with spiral reinforcement. </LI> <LI> Analysis of dilation ratio of confined concrete. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>