• 한국임상수의학회지
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• 제20권2호
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• pp.150-154
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• 2003

진주 지역에서 1000 여두의 생후 1주령 포유 자돈군에 심한 설사증이 발생하였던바 소장조직으로부터 RNA를 추출한 후 reverse transcription-polymerase chain reaction을 실시하였던 결과, porcine epidemic diarrhea (PED) virus (PEDV)의 N 유전자가 검출되어 PED로 진단되었다. Trypsin (10ug/ml)을 첨가한 배지에서 Vero 세포를 배양하면서 장조직으로부터 바이러스 분리배양을 시도하였던 결과 2회의 blind passage 후에 PEDV를 분리할 수 있었다. 따라서 이 분리주를 Chinju99로 명명하였으며, Chinju99주의 생물학적 및 물리화학적 성상을 조사하였던 결론은 다음과 같다. Chinju99주는 전자현미경 소견에서 비정형의 타원형 입자로서 표면에 spike 구조를 가지고 있었으며, Vero 세포내 배양시에 점진적으로 원형변성, 합포체형성 등의 세포변성 소견을 나타내었다. 또한 20% ether, 5% chloroform에서 불안정하였으며 pH 4-7의 산성조건에서는 안정성을 나타내었다. 동시에 $50^{\circ}C$에서 180분간 처리 후에도 감염성이 유지되었고 sucrose 용액에서의 부유밀도가 1.180g/ml으로서, coronavirus의 전형적인 생물학적 및 물리화학적 성상을 나타내었다.

• 임산에너지
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• 제22권2호
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• pp.54-59
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• 2003

최근 들어 북미와 유럽에서는 고밀화한 목질펠릿연료가 재생가능하며 카본뉴트럴한 바이오매스 에너지로서 널리 사용되고 있다. 본 연구에서는 현사시 톱밥의 고밀화를 통한 고형연료화에 관하여 연구하였다. 현사시 품종의 연료적 가치를 평가하기 위하여 열량 및 원소 분석을 수행하였다. 고밀화를 위하여 열압공정을 채택하였으며, 압밀화는 100∼180℃, 250∼1000 kgf/㎠, 2.5∼10분의 조건으로 행하였다. 고밀화연료의 특성은 밀도와 미세분 발생량으로 평가하였다. 목표치로서 고밀화연료의 전건밀도는 1.2 g/㎠ 이상, 5분간 진탕 후의 미세분 발생량은 0.5% 이하로 설정하였다. 목표 밀도와 목표미세분을 만족하기 위해서는 160℃ 이상의 압체온도가 요구되었다. 이 때의 압체압력은 750 kgf/㎠ 이상이 효과적이었다 180℃에서 1000 kgf/㎠으로 5분 이상의 압체가 고밀화연료 제조에 가장 적절한 조건으로 밝혀졌다.

• 문화기술의 융합
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• 제7권2호
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• pp.339-343
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• 2021

본 연구는 복숭아 '천홍'의 착과 수준(fruiting level, FLs)을 3수준(FL-Low, Middle, High)으로 하여 결과지의 신초 발달과 성숙 과실의 무게 및 당도를 비교하였다. 결과지당 신초수 분포 비율에서는 FL-Low의 1-2개(42%), FL-Middle의 1개(47%), FL-High의 1개(42%)에서 가장 높았다. 과실 무게 및 당도 분포 비율에서는 FL-Low의 210-270g (50%) 및 10-12Brix (44%), FL-Middle의 180-240g (60%) 및 10-12Brix (59%), FL-High의 180-240g(60%) 및 11-13Brix (48%)에서 가장 높았다. 그리고 FL-High에서만 과중과 결과지 신초수 간 상관성을 나타내었다. 그리고 당도(y)에 대하여 과실 무게(x)는 FL-L에서 y=0.0126x+8.1857, 그리고 결정계수((R²)가 0.1964으로 P≤0.01 유의수준에서 매우 높은 관계성이 인정되었다.

• 대한화학회지
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• 제24권6호
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• pp.463-468
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• 1980

Tris(hydroxyethyl) phosphate, ethylphosphoramidic dichloride, N,N-diethylphosphoramidic dichloride, bis(hydroxyethyl) N-ethylphosphoramidate 나 bis(hydroxyethyl) N,N-diethylphosphoramidate를 합성하고 특성을 고찰하였다. Phosphate와 두종류의 phosphoramidate는 감압하에서 가열하면 ethylene glycol이 빠지면서 중합반응이 일어났으며 이들 화합물의 mass 스펙트라에서는 분자이온피이크를 관찰할 수 없었다. 또한 ethylphosphoramidic dichloride도 180$^{\circ}C$에서 HCl이 발생되면서 중합체로 변하였다. IR스펙트라에서는 P=O strectching의 특성밴드가 $1,300{\sim}1,200 cm^{-1}$에서 나타났다.

• 한국전기전자재료학회논문지
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• 제30권3호
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• pp.180-184
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• 2017

In this study, we examine the electrical properties of diketopyrrolopyrrole (DPP) containing polymer semiconductors that have been reported to show high performance with ambipolar characteristics. We prepared three different DPP based polymer semiconductors (PDPPTPT, PDPP3T, and PDPP2T-TT) and fabricated organic thin film transistors (OTFTs) with ambipolar polymer semiconductors as an active layer. All three DPP polymers showed only p-type properties at initial measurements. However, after annealing in vacuum oven for 24 hours, it was found that the DPP based polymers have both p-type and n-type properties. It is speculated that the residual impurities supposedly regarded as a strong electron trap source were eliminated during the vacuum process.

• Mycobiology
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• 제34권4호
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• pp.180-184
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• 2006

The mycobiota of 160 hair and nail samples collected from 4 different governorates in upper Egypt were estimated using soil plate method for isolating keratinophilic and dermatophytic fungi. Twenty-three fungi were recorded on both hair and nail samples collected from the four governorates. Highest fungal diversity (20) was collected from Red Sea samples followed by Qena (18) and Aswan (17) while lowest fungal diversity was recorded from Sohage samples. The common genera were Aphanoascus, Aspergillus, Penicillium, Paecilomyces and Chrysosporium. The most prevalent species belonging to these genera were: A. fulvescens, Aphanoascus sp. A. flavus link, A. flavus var. columnaris, P. chrysogenium. P. lilacinus and C. sulfureum. True dermatophytes such as Nannizzia fulva appeared in $20{\sim}30%$ of the male samples.

• 대한지구과학교육학회지
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• 제7권2호
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• pp.180-191
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• 2014

The purpose of this study was to determine the effects on STEAM education for intergrated science inquiry ability of high school students. The experimental and control group were 30 students, respectively. The STEAM program developed by a teacher study group was applied to the experimental group students for 6 months. The control group learned traditional methods. The results of this study showed that the intergrated science inquiry ability of experimental group students were increased positively(P<0.05). Also the abilities as hypothesis, defining variables, determining variables, operational definition and data interpretation improved affirmatively(P<0.05) except graphing.

• 약학회지
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• 제42권5호
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• pp.480-486
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• 1998

Many antitumor and immune modulating components have been isolated from fungal extracts. In this study, the authors isolated the proteoglycans from cultured mycelia of Lentin us lepideus, including especially the acidic polysaccharide fraction, named lepidan. It was obtained by extraction with hot water followed by purification using DEAE cellulose anion exchange. To elucidate antitumor effects against different type of tumor, the proteoglycans were tested on sarcoma 180, C3H MCA clone 16 and P388 leukemia in vivo. Lepidan showed 58.3% of tumor inhibition against solid form of sarcoma 180 and 58.6% against MCA clone 16. But lepidan did not affect life span of mice against P388 leukemia. Also when Lepidan was applicated to MTT assay, it did not show any direct cytotoxicity against various tumor cells in vitro.

• 한국한의학연구원논문집
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• 제3권1호
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• pp.241-260
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• 1997

Effect of Jeongkicheonhyangtang and Kamijeongkicheonhyangtang have been experimentally studied. The results have been obtained as follows : 1. It is proved that analgecic effect on sample I group and sample II group are clearly decreased than control group. Thus, the statistically significant decrease is p<0.005. 2. It is proved that anti-inflammatory effect on sample I group and sample II group are decreased compare to control group. Thus, the statistically significant decrease of sample I group is p<0.05 in 30 and 60-minute, p<0.01 in 90-minute, and p<0.005 in 120 and 180-minute. And those of sample ll group is p<0.05 in 30 and 60-minute and p<0.005 in 90, 120 and 180-minute. 3. It is proved that appearance of gastric ulcer is decreased compare to the control group and the statistically significant decrease is p<0.05. 4. It is proved that plasma epinephrine contents of sample I and II group are clearly decreased compare to the Control Group and the statistically significant decrease is p<0.005. 5. It is proved that plasma norepinephrine contents of sample I group is drastically decreased compare to the control group and the statistically significant decrease is p<0.005. 6. It is proved that plasma dopamine contents of sample I and II group are decreased than the contort group and statistically significant decrease of the sample I group is p<0.005, and those of the sample II group is p<0.05. As the above mentioned results of experiment, It is belived that Jeongklcheonhyang and Kamijeongkicheonhyang have effect for stress.

• Journal of Korean Biological Nursing Science
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• 제23권3호
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• pp.180-187
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• 2021

Purpose: This study aimed to compare breast milk minerals between mothers with gestational diabetes mellitus (GDM) and healthy mothers. Methods: This study was a short-term prospective study to determine the difference in milk minerals of 30 GDM mothers and 30 healthy mothers. Mineral concentrations in breast milk were measured for Na, K, Ca, Mg, and P. The first breast milk was collected on the 5th day after childbirth, while the second one was collected on the 14th day. For the variation of mineral content of breast milk over time between groups, generalized estimation equations were used. Results: The mean age of the GDM group and healthy mother group was 32.56 and 31.17 years old, respectively. Na was significantly higher in GDM mother group (Wild 𝛘²=4.35, p=.037) over time (Wild 𝛘²=21.59, p<.001), and Ca was significantly higher in healthy mother group (Wild 𝛘²=1.77, p=.018) over time (Wild 𝛘²=19.09, p<.001). Mg, P, and K showed a significant difference in time (Wild 𝛘²=18.12, p<.001; Wild 𝛘²=7.73, p=.005; Wild 𝛘²=7.10, p=.008). P was significantly higher in GDM mother group on 5th day of delivery (t=2.08, p=.042). Conclusion: There was a difference in the mineral composition of breast milk between GDM mothers and healthy mothers. Therefore, it is necessary to develop and apply intervention programs such as effective prenatal blood sugar management and postpartum breast massage considering the characteristics of GDM mothers.