• Korean journal of applied entomology
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• v.32 no.1
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• pp.76-82
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• 1993

Phonotaxis of the African mole cricket, Gryllotalpa africana palisot de Beauvois, was investigated in 1990 and 1992 at the agronomy Experiment Station of Korea Ginseng & Tobacco Research Institute in Hwaseong-gun, Kyonggi-do, Male adults produced calling sounds (calling songs) through the openings of subsurface burrows. Intensities of the sound were 77-80 dB at 15 cm above the openings. When tape recordings of male calling songs were broadcasted outdoors at 105-110 dB by two horn speakers installed at the center of a 1.4 m diameter-funnel, flying adults were attracted for 1.5 hours from about 30 minutes after sunset. Among attracted adults, 14.3-16.9% landed in the funnel, and 65.7-74.7% landed on the ground within 2m form the sound source. Females were 66.7-74.3%, which seemed to be due to the sex ratio of the population in the field. Adults landing in the funnel and at the distance of within 2m from the center of the funnel were tend to be a little more than those attracted to a blacklight trap.

• Journal of the Korean Applied Science and Technology
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• v.29 no.4
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• pp.610-617
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• 2012

Trifoliate orange components consist of several kinds, such as monoterpenes, limonoids, flavonoids, and coumarins. Coumarin derivatives were shown to possess valuable pharmacological properties such as anti-inflammatory and dietary effect. Among them, 7-geranyloxycoumarin 6 is a promising chemopreventive agent againist skin, tongue, oesophaqus and colon carcinogenesis in rodents. Seven new coumarin derivatives structurally related to 7-geranyloxycoumarin were synthesised in good yields by $Cs_2CO_3$/acetonitrile condition. We investigated the effect of anti-inflammatory activity on interleukin-6 for synthesised geranyloxycoumarin derivatives. 6-Geranyoxycoumarin 9 (68.9% / $1{\mu}M$ ; 72.6% / $10{\mu}M$) of the anti-inflammatory activity is far higher than 7-Geranyloxycoumarin 5 (40.1% / $1{\mu}M$ ; 61.1% / $10{\mu}M$) and their other derivatives.

• Journal of Fisheries and Marine Sciences Education
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• v.9 no.2
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• pp.149-166
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• 1997

This thesis is studied by means of operation diary of the factory ship GAECHEOG in the Sea of Okhotsk and the Sea of Bering from Jul. 1993 to Dec. 1996, We summarize these results as follows : 1. The factory ship GAECHEOG equipped trawl winch able to haul raw fish 700M/T per day and cargo winch able to unload manufactured goods 900M/T. The crews consist of 290~330 persons. 2. Factory machineries equipped surimi making plant able to process about 150M/T per day and fish meal plant able to manufacture about 70M/T per day. 3. The fishing ground from June to Nov. was the western Bering sea lying in the eastern Kamchaka peninsula and from Dec. to May, the fishing period to gather roe of a Pollack, was the Sea of Ohotsk lying in the western Kamchaka peninsula. 4. The buying catch of fish per each voyage from Dec. to May, the fishing period gathering Pollack-roe, was about 17,000~33,000M/T and from Jul. to Oct., the fishing period gathering non Pollack-roe, was about 10,000~21,000 M/T. 5. Raw fish was the most about 33,000M/T of the 2nd voyage in 1994 and was the least about 8,300M/T of the 1st voyage in 1993. Other voyages were about 13,000~18,000M/T. 6. The Pollack buying from Jul. to Nov. in the Bering sea was 5~7 fishes for one row in pan and body length about 40~50cm, and from Dec. to May in the Sea of Ohotsk was 6~8 fishes for one row in pan and body length about 37~45cm. 7. Surimi production in the 2nd voyage in 1994 was the most about 7,300 M/T, in the 1st voyage in 1993 was the least 1,900M/T and in other voyages was about 2,500~3,800M/T. The extraction rate of surimi goods for raw fish was about 17.4~26.5%. 8. Fish meal production in the 2nd voyage in 1994 was the most about 2,300 M/T, in the 1st voyage in 1993 was the least about 780M/T and in other voyages was about 1,100~1,700M/T. The extraction rate of fish meal goods for raw fish was about 7.3~10.7%. 9. Pollack-roe production was very much from Jan. to Apr. and was about 380~700M/T per each voyage. The extraction rate of Pollack-roe for raw fish was about 1.2~4.9%.

• Journal of Korean Society of Environmental Engineers
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• v.30 no.10
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• pp.1047-1053
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• 2008

This study was to evaluate the optimum conditions for chemical coagulation to remove color from the effluent of a piggery wastewater treatment process. The DOC concentration in the effluent was about 227.3 mg/L, color was 2,430 CU, turbidity was 22.1 NTU, and UV$_{254}$-absorbance was 3.7 cm$^{-1}$. The fractions of hydrophobic, transphilic, and hydrophilic substance of the effluent was about 55.3%, 17.4%, 27.3% respectively. Also, molecular weight cut-off(MWCO) of below 0.5 K, 0.5 K to 1 K, 1 K to 10 K, 10 K to 30 K, and over 30 K were 74.2%, 7.3%, 5.5%, 7.1%, and 5.9% respectively. SCD(streaming current Detector) was used to find out the optimum pH values and coagulant dosages. The optimum dosages and pH of Al$^{3+}$ were 5.84 mM and 5.3, while those of Fe$^{3+}$ were 9.25 mM and 5.0, respectively. At optimum conditions of coagulation, color removal efficiencies for aluminium sulfate and ferric chloride were as high as 91.9 and 98.7%, respectively. Chemical coagulation showed good performance to remove color from on biologically treated piggery wastewater.

• Molecules and Cells
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• v.27 no.6
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• pp.657-665
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• 2009

The ovomucoid pre-mRNA has been folded into mini-hairpins adaptable for the RNA recognition motif (RRM) protein binding. The number of mini-hairpins were 372 for pre-mRNA and 83-86 for mature mRNA. The spatial arrangements are, in average, 16 nucleotides per mini-hairpin which includes 7 nt in the stem, 5.6 nt in the loop and 3.7 nt in the inter-hairpin spacer. The constitutive splicing system of ovomucoid-pre-mRNA is characterized by preferred order of intron removal of 5/6 > 7/4 > 2/1 > 3. The 5' splice sites (5'SS), branch point sequences (BPS) and 3' splice sites (3'SS) were identified and free energies involved have been estimated in 7 splice sites. Thermodynamic barriers for splice sites from the least (|lowest| -Kcal) were 5, 4, 7, 6, 2, 1, and 3; i.e., -18.7 Kcal, -20.2 Kcal, -21.0 Kcal, -24.0 Kcal, - 25.4 Kcal, -26.4 Kcal and -28.2 Kcal respectively. These are parallel to the kinetic data of splicing order reported in the literature. As a result, the preferred order of intron removals can be described by a consideration of free energy changes involved in the spliceosomal assembly pathway. This finding is consistent with the validity of hnRNP formation mechanisms in previous reports.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.144-144
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• 2009

$\mu$-볼로미터의 pixel pitch가 $44{\mu}m$에서 $35{\mu}m$로 작아지며 볼로미터에 입사되는 적외선의 광량은 역시 80% 정도 감소하게 된다. 불로미터 leg 폭과 길이는 구조적 안정을 위해 고정하였으며 두께를 변화하였다. 열적 고립이 개선되는 결과는 시뮬레이션을 통해 비교 분석하였다. Leg를 구성하는 a-Si과 Ti의 두께 변화에 의해 $44{\mu}m$ pixel pitch 인 경우 열 전도도가 1.52E-7 [W/K] 에서 9.64E-8 [W/K]로 개선되는 결과를 얻었으며, $35{\mu}m$인 경우 열 전도도는 1.21E-7 [W/K]에서 1.07E-7 [W/K] 로 개선되는 결과를 얻었다.

• The Korean Journal of Nuclear Medicine
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• v.32 no.2
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• pp.151-160
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• 1998

Purpose: Piccolo et al. advocated the usefulness of $^{99m}Tc$-MDP breast scan in differential diagnosis of breast mass with high accuracy. But there are little or no follow-up studies about it as we know. We studied $^{99m}Tc$-MDP uptake pattern and lesion/background ratio in patients complaining palpable breast lesions to evaluate the clinical usefulness of $^{99m}Tc$-MDP scan. Materials and Methods: Total 34 patients were studied with physical examination, mammo-gram and $^{99m}Tc$-MDP scan prospectively. Anteroposterior and both lateral view of breast were obtained 5 minutes after iv injection of 740 MBq $^{99m}Tc$-MDP. Breast uptake pattern of $^{99m}Tc$-MDP was analyzed by a grade system: 0=no uptake, grade 1=bilateral diffuse uptake, grade 2=asymmetric faint uptake, grade 3=focal hot uptake. 20 cases were pathologically confirmed by excision biopsy or aspiration biopsy. 14 cases were normal in physical examination and mammogram. Results: Pathologic results showed 7 carcinomas, 6 benign solid tumors, and 7 fibrocystic changes. Grade 3 pattern of $^{99m}Tc$-MDP uptake was noted in 4/7 carcinomas, 3/6 benign solid tumors, and 1/7 fibrocystic changes. Grade 2 pattern was 217, 0/7, 3/7 respectively. The average L/B ratio was 1.66 in carcinomas, 1.68 in benign solid masses, 1.20 in fibrocystic diseases, 1.05 in normal patients. L/B ratio was higher in carcinoma and benign mass groups than in fibrocystic change and normal control groups(p=0.005). But there was no statistical difference between L/B ratio of malignant mass group and benign mass group. Conclusion: $^{99m}Tc$-MDP scan is not suitable to routine clinical use for breast mass diagnosis. It might be used in limited conditions when whole body bone scan is planned.

• Journal of Life Science
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• v.12 no.6
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• pp.669-675
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• 2002

Introduction of sliced raw fish meat(SRFM) to fast food business has been considered seriously. However bacteria causing food poisoning should be controlled. Organic acids such as vinegar and lactic acid used in the sauce for SRFM were evaluated for their antibacterial activities. At low concentration levels of vinegar and lactic acid exerted strong antibacterial activities toward Vibriu sp.. In contrast, in case of Salmonella typhimurium and Escherichia coli O157:H7 low anitbacterial activities were observed even at relatively high concentrations. Minimum inhibitory concentrations(MIC) of vinegar for V. vulnificus, V. cholerae non-O1, V. parahaemolyticus, V. mimicus, S. typhimurium and E. coli O157:H7 were 16, 18, 16, 12, 26, and $20{\mu}\ell /m\ell, respertively. MIC of lactic acid for V. vilnificus, V. cholerae non-O1, V. parahaemolyticus, V. mimicus, S. typhimurium and E. coli O157:H7 were 20, 25, 25, 25, 40, and $35{\mu}\ell /m\ell, respectively. In case of vinegar bactericidal concentration upon 10 second contact for V. vulnificus, V. cholerae non-O1, V. parahaenolyticus, V. mimicus and E. coli O157:H7 were 8, 14, 10, 4, and 48%, respectively; however, even at 50% colony of S. typhimurium was observed. In case of lactic acid any colony was observed for V. vulnificus, V. cholerae non-O1, V. parahaemolyticus, V. mimicus, S. typhimurium and E. coli O157:H7 at the concentration of 2, 3, 4, 3, 14, and 17%, respectively. Vinegar and lactic acid of low concentration inhibited the growth of Vibrio sp., food poisoning pathogen in SRFM; in contrast, at high concentration these organic acids inhibited Salmonella sp. and Escherichia sp., food poisoning pathogen in other than SRFM.

• Journal of Bio-Environment Control
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• v.18 no.4
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• pp.348-353
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• 2009

Organic materials reveal the remarkable absorption and high buffer capacity for nutrient. Hence, organic materials need some different nutrient management skill from inorganic one. The objective of this study was to evaluate the effect of EC level of nutrient solution on the yield and quality of cut rose grown in the mixed substrate of coir and perlite. 3 EC levels of nutrient solution was treated, which were 0.7, 1.0, 1.3 times of standard solution (Aichiken solution, Japan) for cut rose hydroponics. EC of the standard solution was changed by season following as 1.4 (Apr.~June), 1.0 (July~Aug.), 1.4 (Sep.~Oct.), and $1.6dS{\cdot}m^{-1}$ (Nov.~Mar.) subsequently. The supply of nutrient solution was controlled by the signal of water potential at -5kPa using frequency domain reflectometry (FDR) sensor. As the results, marketable yield was similar for all treatments until 3rd harvest, but was decreased in high EC level from 4th harvest to 7th harvest as final. 0.7 times of standard solution decreased the ratio of unmarketable rose having short stem below 70cm and increased the ratio of high quality rose having long stem above 91cm. The flower weight and stem diameter of cut rose was higher in the low EC treatment than the others.

• Food Science and Preservation
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• v.20 no.5
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• pp.691-698
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• 2013

The biological activities of Smilax china L. rhizome (SCR), hot water (SCRW) and 70% ethanol extract (SCRE) were analyzed. The total phenolic contents of SCRW and SCRE were 51.7 and 100.5 mg/g, respectively. The measured flavonoid content of SCRW ($67.7{\mu}g/g$) was almost double that of SCRE ($31.7{\mu}g/g$). SCRE ($IC_{50}=42.4{\mu}g/mL$) exhibited stronger antioxidant activity in the DPPH system than the positive control ${\alpha}$-tocopherol ($71.3{\mu}g/mL$) or butylated hydroxy anisole ($53.8{\mu}g/mL$) did. SCRE ($IC_{50}=50.3{\mu}g/mL$) also showed stronger ABTS radical scavenging activity, as did ${\alpha}$-tocopherol ($67.1{\mu}g/mL$). The SOD-like activity and Tyrosinase inhibition activity of SCRW and SCRE showed almost the same pattern. The best SOD-like activity and tyrosinase inhibition activity were measured as 24.9% and 20.3% in SCRW at $1,000{\mu}g/mL$, respectively. The cytotoxic effects of the SCR extracts were analyzed via MTT assay on human cancer and normal cells. SCRW and SCRE did not show cytotoxicity up to the concentration of $1,000{\mu}g/mL$ against the normal human cell line HEK293. Against human breast cancer cells (MCF-7), SCRW inhibited MCF-7 growth (by 27.6%) better than the anticancer drug cyclophosphamide (15.5%) at $1,000{\mu}g/mL$. SCRE ($1,000{\mu}g/mL$) inhibited the growth of human lung cancer cells A549 (37.6%) and human stomach cancer cells AGS (53.6%) more effective than did SCRW (21.0% and 35.4%) or CPA (22.2% and 31.7%). These results suggest the potential use of SCRE and SCRW as an excellent antioxidant and antiproliferative substance, respectively.