• Journal of the Korean Mathematical Society
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• v.59 no.1
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• pp.71-85
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• 2022

In [4], the authors showed that if an h-vector (h₀, h₁, …, h_e) with h₁ = 4e - 4 and h_i ≤ h₁ is a Gorenstein sequence, then h₁ = h_i for every 1 ≤ i ≤ e - 1 and e ≥ 6. In th_is paper, we show that if an h-vector (h₀, h₁, …, h_e) with h₁ = 4e - 4, h₂ = 4e - 3, and h_i ≤ h₂ is a Gorenstein sequence, then h₂ = h_i for every 2 ≤ i ≤ e - 2 and e ≥ 7. We also propose an open question that if an h-vector (h₀, h₁, …, h_e) with h₁ = 4e - 4, 4e - 3 < h₂ ≤ (h₁)₍₁₎|⁺¹₊₁, and h₂ ≤ h_i is a Gorenstein sequence, then h₂ = h_i for every 2 ≤ i ≤ e - 2 and e ≥ 6.

• Korean journal of applied entomology
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• v.47 no.2
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• pp.141-147
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• 2008

Male adults of bean bug, Riptortus clavatus Thunberg (Heteroptera: Alydidae), release aggregation pheromone (AP) attracting both sexes of adult and nymphs, which its egg parasite, Ooencyrtus nezarae (Hymenoptera: Encyrtidae) exploits the pheromone to find host. The AP consists of three components; (E)-2-hexenyl (Z)-3-hexenoate (E2HZ3H), (E)-2-hexenyl (E)-2-hexenoate (E2HE2H), and tetradecyl isobutyrate (TI). We analyzed composition of the pheromone components of bean bugs from different geo graphical locations of Korea and Japan. The attractiveness of different blends of AP components to R. clavatus was also tested in the fields in Jinju, Korea and in Kumamoto, Japan. Composition ratios (E2HZ3H: E2HE2H:TI) of the AP of Jinju and Iksan populations were 1:1.4:0.2 and 1:0.8:0.2, and those of Tsukuba and Kumamoto populations were 1:2.8:0.2 and 1:1.5:0.1, respectively. In field tests, traps baited with ratio of 1:1:1 (E2HZ3H:E2HE2H:TI=16.7:16.7:16.7mg/rubber septum) and 1:1:0.5(E2HZ3H:E2HE2H:TI= 20:20:10mg/rubber septum) attracted significantly greater number of adult bugs than that of 1:5:1 (E2HZ3H:E2HE2H:TI=7.1:35.7:7.1mg/rubber septum).

• Korean Journal of Mathematics
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• v.14 no.2
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• pp.227-232
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• 2006

We study some dynamical properties in the context of bitransformation groups, and show that if (H,X,T) is a bitransformation group such that (H,X) is almost periodic and (X/H,T) is pointwise almost periodic $T_2$ and $x{\in}X$, then $E_x=\{q{\in}E(H,X){\mid}qx{\in}{\overline{xT}\}$ is a compact $T_2$ topological group and $E_{qx}=E_x(q{\in}E(H,X))$ when H is abelian, where E(H,X) is the enveloping semigroup of the transformation group (H,X).

• Food Science of Animal Resources
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• v.23 no.3
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• pp.278-283
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• 2003

Feasibility tests on using liposomes for detecting food-borne pathogenic bacteria were studied with E. coli 0157:H7 as a model analyte. lmmunoliposomes, whose surface was conjugated with anti-E. coli 0157:H7 IgG and which encapsulated the marker dye, sulforhodamine B, were used for the detection label. Among the feasibility tests, the first test was to use a test-strip on which antibodies to anti-E. coli O157:H7 IgG were immobilized. In this format, immunoliposomes that did not bind to E. coli O157:H7 in sample were captured and then exhibited a visible signal which was inversely related with the number of E. coli O157:H7 in sample. The second test was a direct liposome assay followed by immunomagnetic separation. In this format, immunoliposomes which were bound to E. coli O157:H7 were lysed with detergent and produced a signal which was proportionally related with the number of E. coli O157:H7 in sample. The results from both formats indicate that liposomes can be utilized as a detection label.

• Journal of Korean Home Economics Education Association
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• v.9 no.1
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• pp.95-110
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• 1997

The purpose of this study are (1) to analysis the Paradigm’s changes in Educational Technology, (2) to examine its practice in Home Economics Education (H.E.E.), especially the researches about CAI in H.E.E. and (3) to propose the ideal practice of Educational Technology in H.E.E. As results, the paradigms of Educational Technology have been changed from media-centered to human-centered, and from objectivism(behaviorism and cognitivism) to constructivism. Related on Educational Technology, there have been six conceptual distortions or confusions in H.E.E. The Analyzed seven previous works on CAI in H.E.E. show the traditions of the Objectivism. And suggestions for ideal practice of Educational Technology in H.E.E. are presented.

• Journal of Food Hygiene and Safety
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• v.32 no.4
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• pp.336-340
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• 2017

The present study evaluated the antibacterial effect of Flos syzygii Aromatici methanolic extracts (FSAE). In addition, the effectiveness of FSAE against Escherichia coli O157:H7 infection was studied using ICR female mice. At 24 h after incubation of E. coli O157:H7, FSAE at the concentration of 0.269 (p < 0.05), 0.538 (p < 0.001) and 1.075 mg/mL (p < 0.001) significantly inhibited the growth of E. coli O157:H7 compared to the control group. After single challenge with E. coli O157:H7, forty female ICR mice were divided into four experimental groups which were orally administered with saline (control), 0.538 (group 1), 1.075 (group 2) and 2.15 mg/mL (group 3) of FSAE, respectively. On the 3rd day, the number of fecal E. coli O157:H7 in group 2 (p < 0.05) and group 3 (p < 0.01) was significantly decreased compared to that in the control group. On the 7th day post-treatment, the number of fecal E. coli O157:H7 in all FSAE-treated groups was significantly decreased compared to that in the control group (group 1, p < 0.05; group 2 and 3, p < 0.001). According to the results of the present study, administration of FSAE to mice can reduce the severity of E. coli O157:H7 infection. Therefore, the current study suggests that FSAE could be a good candidate for the treatment of enteric infections in domestic animals.

• Microbiology and Biotechnology Letters
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• v.29 no.3
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• pp.169-175
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• 2001

This study was conducted to investigate the effects of bifidobacteria on the growth and Caco-2 cell-adherence of Escherichia coli O157:H7 .Dur-ing momo-culture of E. coli O157:H7 and mixed culture with Bifidobacterium infantis K9, pH viable cell count, and ammonia concentration were measured Co-cultivation of E. coli O157:H7 with bifidobacteria. producing acidic metabolites rapidly decreased the viable cell count of E. coli O157:H7 In addition rapid decrease of ammo- nia concentration was observed during mixed culture after 8 hrs incubation compared to single culture of E. coli O157:H7 Therefore it is likely that bifidobacteria assimilate ammonia produced by E. coli O157:H7 P4 B, infantis K9 showed quite similar adherence on the Caco-2 cells in either case. On the other hand adherence of E. coli O157:H7 decreased from 2.6% to 1.86% when B infantis K9 was adhered to Caco-2 cell 2 hrs prior to the application of E. coli O157:H7 In conclusion in adherence of E coli O157:H7 to Caco -2 cell was inhibited by competition of its binding to the adherence site with bifidobacteria. In addition inhibitory effects of bifidobacteria on E coli O157:H7 appeared to be much higher with increae of the number of bifidobacteria and its ability of adherence to Caco-2 cells.

• Journal of Food Hygiene and Safety
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• v.13 no.4
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• pp.365-369
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• 1998

The in vitro effects of trisodium phosphate and cetylpyridinium chloride on E. coli 0157:H7 and L. monocytogenes were investigated. The trisodium phosphate and cetylpyridinium chloride was bactericidal toward E. coli 0157:H7 and L. monocytogenes. The killing effects of the $1{\times}10^{-2}\;M$ trisodium phosphate on E. coli 0157:H7 and L. monocytogenes were 30~40%, 40~50%, respectively. The killing effects of the $5{\times}10^{-7}\;M$ cetylpyridinium chloride on E. coli 0157:H7 and L. monocytogenes were 90~95%, 95~99%, respectively. The killing effects of the trisodium phosphate was $10^5$ times that of the cetylpyridinium chloride. Factors effecting the bactericidal action of trisodium phosphate and cetylpyridinium chloride were investigated and the action depended on temperature and pH.

• Korean Journal of Human Ecology
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• v.6 no.2
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• pp.187-198
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• 1997

The purpose of this study is to find some directions for students' future and Home Economics Education. Juniors and Seniors majoring in Home Economics were selected from 4 Universities in Chungbuk Province and the questionnare survey was used. The results of this study are as follows : 1. Most of respondents were defined the H.E. as the academic subject, and 50.2% of them regarded H.E. as a necessary subject regardless of whether it is their major or not. 2. Though the most general motives of choosing H.E. as their major were recommendation of their parents/neighbors or their school record, they are satisfied with their major. 3. The strongest reason majoring in H.E. was that it is helpful to living, and some students didn't show any interest because H.E. was not considered as a realistic study. 4. Many respondents answered that male students have to learn H.E., and thought that H.E. Education is much influential to one's living. 5. 59.6% of respondents replied that cultural studies related to H.E. are opened at the universities, and 90.6% of them thought subjects related to H.E. should be opened as cultural studies. 6. After graduation, 48.3% of respondents will choose their jobs related to their major, and they prefer to be a teacher, a dietition and a fashion designer in its order. 7. 44.3% of respondents thought that H.E. is neglected and 50.7% of them answered that the research by industrial-educational cooperation is necessary. 8. Many students majoring in H.E. took an optimistic view about H.E.'s future as a study.

• Archives of Pharmacal Research
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• v.28 no.2
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• pp.172-176
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• 2005

Phytochemical investigation of the whole plant of Amberboa ramosa led to the isolation of six sesquiterpene lactones which could be identified as $8{\alpha}$-hydroxy-$11{\beta}$-methyl-$1{\alpha}H,\;5{\alpha}H,\;6{\beta}H,\;7{\alpha}H,\;11{\alpha}H-guai-10(14)$, 4(15)-dien-6, 12-olide(2), $3{\beta},\;8{\alpha}-dihydroxy-11{\alpha}-methyl-1{\alpha}H,\;5{\alpha}H,\;6{\beta}H,\;7{\alpha}H,\;11{\beta}H-guai-10(14)$, 4(15)-dien-6, 12-olide (2), $3{\beta},\;4{\alpha},\;8{\alpha}-trihydroxy-4{\beta}(hydroxymethyl)-1{\alpha}H,\;5{\alpha}H,\;6{\beta}H,\;7{\alpha}H-guai-10(14)$, 11(13)-dien-6, 12-olide (3), $3{\beta},\;4{\alpha},\;8{\alpha}-trihydroxy-4{\beta}-(chloromethyl)-1{\alpha}H,\;5{\alpha}H,\;6{\beta}H,\;7{\alpha}H-guai-10(14)$, 11(13)-dien-6, 12-olide(4), $3{\beta},\;4{\alpha},\;dihydroxy-4{\beta}-(hydroxymethyl)-1{\alpha}H,\;5{\alpha}H,\;6{\beta}H,\;7{\alpha}H-guai-10(14)$, 11(13)-dien-6, 12-olide(5), $3{\beta},\;4{\alpha}-dihydroxy-4{\beta}-(chloromethyl)-8{\alpha}-(4-hydroxymethacrylate)-1{\alpha}H,\;5{\alpha}H,\;6{\beta}H,\;7{\alpha}H-guai-10(14)$, 11(13)-dien-6, 12-olide (6) by spectroscopic methods. All of them showed inhibitory potential against butyrylcholinesterase.