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이순자,고대희,최운정 서강대학 지역발전연구소 1998 지역발전연구 : 서강전문대 Vol.4 No.2
This study was made to find out the relationship between the body mass index (BMI) and food habit among 68 male and 304 female college students. A self-report questionnaire was used about the height, weight and food habit. The summary of the results are as follows : The average age of the male subjects is 20.52, female subjects is 19.64. Almost all of the subjects were in the criteria of standard weight group and low weight group. However female subjects regard themselves more obese than their actual body shape and male subjects regard themselves more thinner than their actual constitution. Almost of the subjects were lack of exercise and the correlation between BMI, regular exercise and regular eating was significant. Food habit score was within the category of Fair or Poor group. All the male and female subjects have highest score in green-yellow vegetables intake and the lowest score in seaweeds intake. Therefore nutrition education for the desirable dietary life management of college students should be carried out with respect to the correct perception of ideal body shape and actual self body shape and the adequate weight control diet.
( Dae-woon Jeong ),( Won-bi Han ),( Jae-oh Shim ),( Won-jun Jang ),( Yeol-lim Lee ),( Hyun-seog Roh ),( Jae Hoi Gu ),( Yong Taek Lim ) 한국폐기물자원순환학회(구 한국폐기물학회) 2014 한국폐기물자원순환학회 심포지움 Vol.2014 No.1
A rapid one step direct synthesis of high temperature water gas shift (WGS) catalysts, magnetite incorporated with various promoters like Co, Ni, Cu, and Zn have been shown. An amino acid glycine was used as a complexing agent as well as a fuel for the auto-combustion process. The zwitterionic nature of glycine favors the easy incorporation of the promoter metal ions. In addition, reducing atmosphere created by glycine during its burning makes it possible to prepare magnetite directly. During the high temperature WGS, the activity follows the order Cu-FAG > Ni-FAG > Zn-FAG > Co-FAG. The optimization of Cu loading is also carried out. At 12.5 mole % of Cu loading the catalytic activity reached a CO conversion value of 87% at 400℃.
Optimization of Metal Substituted Spinel Ferrite Catalysts for Waste-Derived Synthesis Gas
( Dae-woon Jeong ),( Won-jun Jang ),( Jae-oh Shim ),( Hyun-seog Roh ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2016 No.-
The purpose of this study was to prepare directly the magnetite of spinel ferrite catalysts using glycine assisted sol-gel combustion method and to compare the catalytic activity of Ni, Co, Mn, Mg, and Zn substituted spinel ferrite catalysts for the high temperature shift reaction (HTS). Selected metal ions (Ni, Co, Mn, Mg, and Zn) were introduced into iron oxide (spinel lattice) and the resulting materials screened for catalytic performance for the HTS reaction using waste-derived synthesis gas. The active phase of spinel ferrite catalysts was directly prepared by the glycine assisted sol-gel combustion method under a reducing atmosphere. Among the synthesized catalysts, NiFe2O4 catalyst exhibited the highest CO conversion (X<sub>CO</sub> = 81%) with long term stability even at a very high gas hourly space velocity of 40,057h<sup>-1</sup>. This result was mainly due to the inverse spinel structure and easier reducibility of NiFe<sub>2</sub>O<sub>4</sub> catalyst. The properties of metal ferrite spinel have been analyzed by Brunauer-Emmett-Teller (BET) method, X-raydiffraction (XRD), and temperature programmed reduction (TPR).