• Journal of Environmental Health Sciences
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• v.17 no.1
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• pp.74-78
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• 1991

This study was performed to investigate the effect of heavy metals and CN on BOD$_{5}$ measurement. The results were as follows: 1. The BOD$_{5}$ value decreased 20% in Cd(CdCl$_{2}$) 3.0mg/l, Ni(NiCl$_{2}$) 7.0mg/l, Cu(CuCl$_{2}$) 0.5mg/l, Pb($Pb(NO_{3})_{2}$) 9.0mg/l, Cr($K_{2}Cr_{2}O_{7}$) 1.0mg/l respectively. 2. The BOD$_{5}$ value decreased 10% in Zn($Zn(NO_{3})_{2}$) 5 mg/l, Fe(FeCl$_{3}$) 20mg, /l, and 25% in CN(KCN) 5mg/l, and 40% in Hg(HgCl$_{2}$) 0.2rng/l. 3. In Comparion with BOD Rapid Analyzer, the above mentioned heavy metals concentrations have no effect on BOD$_{5}$ value of that analyzer except CN.

• Journal of Plant Biotechnology
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• v.31 no.2
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• pp.95-101
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• 2004

This study was undertaken to study the effect of interspecific pollination of L. longiflorum and L. ${\times}$formolongi as the female parent with Oriental, Martagon and Trumpet group as the male parent by cut-style pollination. In the interspecific pollination of L. longiflorum cv. Gelria and Lorina with Oriental group as the male parent, the corresponding fruits obtained immature embryo were 1, 8, and the mean number of embryo per fruit were 11.0, 3.0, respectively. In the interspecific pollination of L. ${\times}$formolongi cv. Raizan, the corresponding fruits obtained immature embryo were 17, and the mean number of embryo per fruit were 4.0. On the other hand, in the interspecific pollination between L. longiflorum and L. ${\times}$formolongi as the female parent and Martagon and Trumpet group as the male parent, the pollination of L. ${\times}$formolongi as the female parent and L. henryi of Trumpet group as the male parent were obtained only 2 fruits, however no embryo.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.5221-5231
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• 2010

The complex formation from Ni(II) ion and 2-(2-Hydroxyethylamino)-2-(hydroxymethyl)-1,3-propanediol(Monotris) in aqueous solution at $25^{\circ}C$ and at ionic strength of 0.10M has been studied potentiometrically. In the Monotris(L) comlex $NiL^{2+}$, hydroxyl oxygen atom as well as the amine nitrogen of the ligand are coordinated to the Ni(II) ion.. The complex $NiL^{2+}$ undergoes further dissociation as the pH is increased forming triply deprotonated dinuclear complex $Ni_2L_2H_{-3}^+$.

• Journal of Advanced Navigation Technology
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• v.16 no.1
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• pp.16-26
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• 2012

Pseudolites are ground-based transmitters that can be configured to emit GPS-like signals for enhancing the GPS by providing increased accuracy, integrity, and availability. However, a pseudolite (PL) can interfere with GPS satellite signals while it is transmitting or cause saturation to automatic gain control circuit. To solve these problems pulsing scheme is used, which transmits PL signal during a short period of time. In this paper the effect of the number of PL and pulsing scheme on the software GPS L1 and L2C signal acquisition performance is studied for the three pulsing schemes such as static pulsing, sweep pulsing, and pseudo random pulsing. For GPS L1 signal, static pulsing shows the best signal acquisition and tracking performance with one PL, and random pulsing shows the best performance with more than or equal to two PLs. For GPS L2C signal, all three pulsing schemes show the similar signal acquisition and tracking performance, but static pulsing shows a little better performance. For GPS L1 and L2C signals, software GPS receivers can do positioning with up to three PLs.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.4
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• pp.765-774
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• 1992

The effect of the interactive flow on convective heat transfer from two vertical isothermal parallel plates have been studied numerically by the finite difference method. The Reynolds number, Grashof number, the relative length, L$_{2}$/L$_{1}$, and the dimensionless plate spacing, b/L$_{1}$ are varied as parameters. In case of outside mean Nusselt number, left outside mean Nusselt numbers show same values as L$_{2}$/L$_{1}$ and b/L$_{1}$ increase, but right outside mean Nusselt numbers decrease as L$_{2}$/L$_{1}$ increases. The inside mean Nusselt numbers are constant at narrow spacings and increase at wide spacings as Grashof numbers increase. The optimun plate spacing on left inside mean Nusselt numbers is b/L$_{1}$=0.4 at Re=100 and b/L$_{1}$=0.3 at Re=200. For the right inside mean Nusselt number, the optimum plate spacings move to the narrow spacing as Reynolds numbers increase and L$_{2}$/L$_{1}$ decrease.

• Journal of Sericultural and Entomological Science
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• v.53 no.2
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• pp.124-129
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• 2015

We have previously characterized the complete fibroin light chain gene from one of the silkworm race Baegokjam (Bombyx mori) and found two variable regions (FibL1, intron 2 ~ 3; FibL2, intron 6) with the primer sets designed to cover these variable regions. In this study, we tested the utility of these variable regions as genetic markers for classifying silkworm races. For the purpose, Europian races (Q, PK), Chinese races (C26, C31), Japanese races (N15, N9), and tropical races (SA2, SA5) were used in this experiment. The polymorphism of the FibL1 and FibL2 were divided into two and three types, respectively. The combination of the FibL1 and FibL2 polymorphisms were constant within the same races. The result suggest that the primer sets designed from two variable regions of fibroin light chain gene may be useful as the genetic markers for silkworm races.

• Journal of the Korean Chemical Society
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• v.39 no.9
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• pp.715-721
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• 1995

Reaction between trans-$[Co(py)_4/Ci_2]^+(py=pyridine)$ and L-proline and diimine (=2,2'-bipyridine, 1,10-phenanthroline) gives two products, $[Co(L-pro)_2/(bipy)]^+$ and $[Co(L-pro)_2(phen)]^+$ complexes, respectively. On column chromatography, $[Co(L-pro)_2(bipy)]^+$ was obtained only as $Lambda$-trans(N) and $[Co(L-pro)_2(phen)]^+$ was obtained both as ${\Delta}$-trans(N) and $Lambda$-cis(O)cis(N) due to the stereoselectivity of L-prolinato which was stereospecific. Crystal data are as follows: $Lambda$-trans(N)-$[Co(L-pro)_2(bipy)]CIO_4{\cdot}2H_2O$ (1): monoclinic, space group $P2_1(#4)$, a=9.807(3), b=10.421(1), c=12.778(2) ${\AA}$, ${\beta}=109.90(2)^{\circ}$, V=1227.8(5) ${\AA}^3$, Z=2; 1571 data with I > 3.0${\sigma}$(I) were refined to R=0.060, $R_W = 0.067$; ${\Delta}$-trans(N)-$[Co(L-pro)_2(phen)]Cl{\cdot}_3H_2O$(2): monoclinic, space group $P2_1(#4)$, a=9.838(2), b=12.892(2), c=10.747(2)${\AA}$, ${\beta}=113.79(2)^{\circ}$, V=1247.2(4) ${\AA}^3$, Z=2; 2433 data with I > 3.0${\sigma}$(I) were refined to R=0.043, $R_W = 0.050$.

• Journal of Korean Society on Water Environment
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• v.26 no.3
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• pp.507-517
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• 2010

Long-term monitoring was conducted to identify the runoff characteristics of non-point source according to the three forest types (deciduous forest, coniferous forest and mixed forest) in this study. Rainfall events of each deciduous forest, coniferous forest, and mixed forest were 10, 8, 12, respectively. Average runoff depth and coefficients of each forest type were founded to be coniferous forest and were followed by others in turns : deciduous forest, and mixed forest because various conditions (i.e., rainfall property, Antecedent Precipitation Index (API), soil property, slope, and forest management) could change runoff characteristics. In the analysis of the first flush phenomenon, it showed that SS and T-P were sensitive for the first flush phenomenon. The first flush phenomenon of them were showed differently by rainfall intensity, rainfall duration, and amount of rainfall. The research results indicated that range of the Event Mean Concentration (EMC) values in deciduous forest were 0.8~2.4 mg/L for $BOD_5$, 2.0~13.4 mg/L for $COD_{Mn}$, 1.3~2.9 mg/L for DOC, 1.150~3.913 mg/L for T-N, 0.010~0.350 mg/L for T-P and 3.1~291.8 mg/L for SS and in coniferous forest were 0.8~2.2 mg/L for $BOD_5$, 1.9~3.6 mg/L for $COD_{Mn}$, 1.0~2.0 mg/L for DOC, 1.025~2.957 mg/L for T-N, 0.002~0.084 mg/L for T-P and 0.8~5.4 mg/L for SS. Also, range of the EMC values in mixed forest were 1.3~2.3 mg/L for $BOD_5$, 2.4~4.8 mg/L for $COD_{Mn}$, 1.1~2.1 mg/L for DOC, 0.385~2.703 mg/L for T-N, 0.016~0.080 mg/L for T-P and 2.3~30.0 mg/L for SS.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.11
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• pp.1660-1665
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• 2010

To obtain data for the standardization of manufacturing method of red ginseng extract pouch products, saponin and physico-chemical properties of 44 Korean red ginseng extract pouch products were analyzed. The concentration of total ginsenoside contents were 5.5~185.7 mg/100 mL. Distribution of the contents of ginsenoside $Rg_3$, $Rg_2$, $Rh_1$, and $Rh_2$ known to have anticancer effect are as follows: $Rg_3$ is 1.6~46.3 mg/100 mL, $Rg_2$ is 0~22.0 mg/100 mL, $Rh_1$ is 0~4.3 mg/100 mL and that of $Rh_2$ is 0~20.4 mg/100 mL, respectively. The anti-diabetic effect of ginsenoside $Rb_2$ and Re distribution of contents were 0~10.8 mg/100 mL and 0~7.0 mg/100 mL, respectively. Among the other saponins, exhibited content to distribution of ginsenoside $Rb_1$ was 0~25.2 mg/100 mL, Rc was 0~12.5 mg/100 mL, Rd was 0~11.3 mg/100 mL, Rf was 0~5.9 mg/100 mL and $Rg_1$ was 0~4.4 mg/100 mL. Results of physicochemical characterization showed total sugar content of 226.6~3,102.9 mg/100 mL, total soluble solids content $1.4\sim9.5^{\circ}Bx$, turbidity 82.2~100.0%, pH in the range of 4.1 to 5.0, respectively. In approximately 50% of collected domestic ginseng extract pouch products (21~24 items), ginsenoside $Rb_1$, $Rb_2$, Rc, Rd, Re and $Rg_1$ were not detected, and saponin content of each product appears to differ greatly. Results indicated that standardization of production methods and standards set for red ginseng extract pouch products in Korea is needed.

• Journal of Plant Biotechnology
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• v.30 no.1
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• pp.53-58
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• 2003

This study was performed to investigate the effects of various media compositions in regeneration of Lilium lancifolium. The adventitious bud initiation from microscale was the best on MS medium supplemented with BAP 1.0 mg/L and NAA 0.1 mg/L after 4 weeks of culture. However, from bulbscales, adventitious bud initiation was the best in dark condition on MS medium supplemented with BAP 0.5 mg/L and NAA 0.1 mg/L. On the other hand, callus induction was found to be the best from the microscales incubated in complete dark condition for 8 weeks on MS medium supplemented with 2,4-D 1.0 mg/L and BAP 0.1 mg/L. The highest plantlet regeneration from callus was obtained after incubation in the light condition for 8 weeks on MS medium supplemented with NAA 0.5 mg/L and BAP 0.1 mg/L. Rooting of shoots was obtained easily on MS medium and the plantlets were transferred to soil pots after 8 weeks. The chromosome analysis of the root tip cells was revealed that the callus-derived plantlets had normal chromosome number, 2n=24. No variation was observed in the morphology of the plantlets.