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박만용,임영석,김상도,서대교 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.2
The formability of aluminium sheet(Al 1100), i.e., the maximum effective cup height, the uniformity of drawn cup height, the limiting drawing ratio, the thickness distribution of drawn cup and the maximum drawing load are discussed for the square and rectangular cup drawing. Two blank shapes are adopted to compare the above formabilities. One(h-bl) is designed be the slip -line theory and the other(G-bl) is the conventional shape. The five punch shape factors are considered to investigate the wide range of formability. As a result, the theoretical blank shape(h-bl) is recommended to accomplish the higher effective cup height, the larger limiting drawing ratio, the superior uniformity of drawn cup height and more smooth thickness distribution.
Man-Seok Seo,Jong-Yeol Kim,Soo-Ho Kim,Byong-Kwon Jeh 한국펄프·종이공학회 2017 펄프.종이기술 Vol.49 No.3
The fiber compositions of cigarette papers were considered to evaluate the effects of flax and wood fibers of cigarette papers on the pyrolytic chemicals of cigarettes. In the two different circumferential cigarette systems, the replacement of flax paper by wood paper was carried out to simulate the effects of flax and wood fibers. The pyrolytic chemicals of cigarettes such as tar, nicotine, and carbon monoxide (CO) were analyzed by combusting process. The replacement of papers from flax to wood fibers showed similar levels of tar and nicotine, but showed an increased delivery of CO. The pyrolytic amounts of CO were different, depending on the properties of flax and wood paper, and porous structure of paper.
Seo, Sung-Man,Kim, Ghyung-Hwa,Lee, Seok-Hee,Bae, Jun-Seok,Lim, Woo-Taik Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.6
Large single crystals of zeolite, |$Na_{75}$|[$Si_{117}Al_{75}O_{384}$]-FAU (Na-Y, Si/Al = 1.56), were synthesized from gels with composition of 3.58Si$O_2$ : 2.08NaAl$O_2$ : 7.59NaOH : 455$H_2$O : 5.06TEA : 2.23TCl. One of these, a colorless single-crystal was ion exchanged by allowing aqueous 0.02 M CsOH to flow past the crystal at 293 K for 3 days, followed by dehydration at 673 K and 1 ${\times}\;10^{-6}$ Torr for 2 days. The crystal structure of fully dehydrated partially $Cs^+$-exchanged zeolite Y, |$Cs_{45}Na_{30}$|[$Si_{117}Al_{75}O_{384}$]-FAU per unit cell (a = 24.9080(10) $\AA$) was determined by single-crystal X-ray diffraction technique in the cubic space group Fd $\overline{3}$ m at 294(1) K. The structure was refined using all intensities to the final error indices (using only the 877 reflections with $F_o\;>\;4{\sigma}(F_o))\;R_1$ = 0.0966 (Based on F) and $R_2\;=\;0.2641\;(Based\;on\;F^2$). About forty-five $Cs^+$ ions per unit cell are found at six different crystallographic sites. The 2 $Cs^+$ ions occupied at site I, at the centers of double 6-ring (D6Rs, Cs-O = 2.774(10) $\AA$ and O-Cs-O = 88.9(3) and 91.1(3)$^o$). Two $Cs^+$ ions are found at site I’ in the sodalite cavity; the $Cs^+$ ions were recessed 2.05 $\AA$ into the sodalite cavity from their 3-oxygen plane (Cs-O = 3.05(3) $\AA$ and O-Cs-O = 77.4(13)$^o$). Site-II’ positions (opposite single 6-rings in the sodalite cage) are occupied by 7 $Cs^+$ ions, each of which extends 2.04 $\AA$ into the sodalite cage from its 3-oxygen plane (Cs-O = 3.067(11) $\AA$ and O-Cs-O = 80.1(3)$^o$). The 26 $Cs^+$ ions are nearly three-quarters filled at site II in the supercage, being recessed 2.34 $\AA$ into the supercage (Cs-O = 3.273(8) $\AA$ and O-Cs-O = 74.3(3)$^o$). The 4 $Cs^+$ ions are found at site III deep in the supercage (Cs-O = 3.321(19) and 3.08(3) $\AA$), and 4 $Cs^+$ ions at another site III’ (Cs-O = 2.87(4) and 3.38(4) $\AA$). About 30 $Na^+$ ions per unit cell are found at one crystallographic site; The $Na^+$ ions are located at site I’ in the sodalite cavity opposite double 6-rings (Na-O = 2.578(11) $\AA$ and O-Na-O = 97.8(4)$^o$).
Use of Cationic PAM as a Surface Sizing Additive to Improve Paper Properties
Man Seok Seo,Hak Lae Lee,Hye Jung Youn 한국펄프·종이공학회 2006 한국펄프종이학회 기타 간행물 Vol.- No.-
This study was focused on the use of cationic PAM (Polyacrylamide) as a surface sizing additive to improve the surface sizing properties of paper. Effects of the ionic property, viscosity and charge density of PAM on bending stiffness of surface sized papers were investigated. Use of cationic PAM as a surface sizing additive improved bending stiffness while addition of anionic PAM did not show any effect. Increase of starch holdout with the addition of cationic PAM was attributed as a prime reason of stiffness increase. Viscosity of PAM was one of the most important factors affecting surface sizing due to its influence on the interaction between cationic PAM and oxidized starch solution. Greater improvement of bending stiffness of paper was obtained when high charged PAM was used as an additive. The order of addition was found to have significant influence on the effect of additives since it influences the formation of network structure among starch, cationic PAM, and SA (styrene acrylic acid copolymer). Investigation on the penetration of starch solution was carried out with CLSM (Confocal Laser Scanning Microscopy), and it was shown that the addition of cationic PAM to oxidized starch solution made starch molecules stay on the paper surface rather than penetrating into the paper structure because of the electrostatic interaction between negatively charged fibers and positively charged cationic PAM.
서만석(Man Seok Seo) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.4 No.-
The results of analyzing the 20 piece of surface sediments were characteristics following Textural and geochemical, aspect. The mean size is 0.20-6.22 rP, but the sorting 0.5-3.96, however, The Skewness is -0.28 - 5.7, and Kurotosis shows a range of 1.70 - 20.30. The geochemical characteritics were showed relationship with mean value in all elements in the fine grained sediments and K20 in coarse graned sediments, The minor element Cd, Cu, Pb, Zn, Cr, Li in fine grained sediment, Ba in coarse grain sediment. The Hg element is demonstrated in the all section of distribution. The high possibility of pollution element Pb, Zn which mean concentration is appeared highly at the adjacent in land sea area. It give a preview that this area being polluted.
Sung Man Seo,Ghyung Hwa Kim,Seok Hee Lee,Jun-seok Bae,임우택 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.6
Large single crystals of zeolite, |Na75|[Si117Al75O384]-FAU (Na-Y, Si/Al = 1.56), were synthesized from gels with composition of 3.58SiO2 : 2.08NaAlO2 : 7.59NaOH : 455H2O : 5.06TEA : 2.23TCl. One of these, a colorless single-crystal was ion exchanged by allowing aqueous 0.02 M CsOH to flow past the crystal at 293 K for 3 days, followed by dehydration at 673 K and 1 × 10-6 Torr for 2 days. The crystal structure of fully dehydrated partially Cs+-exchanged zeolite Y, |Cs45Na30|[Si117Al75O384]-FAU per unit cell (a = 24.9080(10) Å) was determined by single-crystal X-ray diffraction technique in the cubic space group Fd 3 m at 294(1) K. The structure was refined using all intensities to the final error indices (using only the 877 reflections with Fo > 4σ(Fo)) R1 = 0.0966 (Based on F) and R2 = 0.2641 (Based on F2). About forty-five Cs+ ions per unit cell are found at six different crystallographic sites. The 2 Cs+ ions occupied at site I, at the centers of double 6-ring (D6Rs, Cs-O = 2.774(10) Å and O-Cs-O = 88.9(3) and 91.1(3)o). Two Cs+ ions are found at site I’ in the sodalite cavity; the Cs+ ions were recessed 2.05 Å into the sodalite cavity from their 3-oxygen plane (Cs-O = 3.05(3) Å and O-Cs-O = 77.4(13)o). Site-II’ positions (opposite single 6-rings in the sodalite cage) are occupied by 7 Cs+ ions, each of which extends 2.04 Å into the sodalite cage from its 3-oxygen plane (Cs-O = 3.067(11) Å and O-Cs-O = 80.1(3)o). The 26 Cs+ ions are nearly three-quarters filled at site II in the supercage, being recessed 2.34 Å into the supercage (Cs-O = 3.273(8) Å and O-Cs-O = 74.3(3)o). The 4 Cs+ ions are found at site III deep in the supercage (Cs-O = 3.321(19) and 3.08(3) Å), and 4 Cs+ ions at another site III’ (Cs-O = 2.87(4) and 3.38(4) Å). About 30 Na+ ions per unit cell are found at one crystallographic site; The Na+ ions are located at site I’ in the sodalite cavity opposite double 6-rings (Na-O =2.578(11) Å and O-Na-O = 97.8(4)o).
서만석(Man Seok Seo),배석제(Seok Je Bae) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.3 No.-
I. The supply of protein, carbon hydrate, fat in the material of food were plentiful for surplus the 2 -3.9 times on the level of food stuff, but vitamim 82, C, were rack of the required standards of food stuff. II. The calories of supplied food was 3,060.61 Kcal in the early stage of voyage, 3,142 Kcal in the middle stage the voyage, 3,021 Kcal in the last stage of voyage mean 3,074.64 Kcal similarly. III. As to the calories of intake. The crew(3,266.4 Kcal) was higher than the cadet(2,829.8 Kcal). The calories of intake was small to the end stage of voyage to the cadet. IV. The difference of the calories of consumtion and intake was 2.10% in the case of crew, 4.25% in the case of cadet, mean 3.175 % similarly. V. The supply of freshwater was plentiful and the variation of body weight is no account for the crew but the cadet is decreased 1.2kg a man at the last disembarkation day. VI. The 3rd rule for food stuff supply as to the 74th rules seamans Act were desireable to amend according to the nutrition level of nutrtion recommended amount.