• 한국작물학회지
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• 제36권6호
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• pp.513-520
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• 1991

충남 예산에서 호밀을 답리작으로 재배할때 파종량과 예취기간가 수량 및 사료가치에 미치는 영향을 요약하면 다음과 같다. 1. 파종량이 많아질수록 호밀의 초장과 단위면 적당 경수는 증가하였으며 건물률은 감소하였다. 2. 청예 및 건물수량은 파종량이 많을수록 높았으며 예산에서 청예수량이 가장 높았던 예취기는 5월 15일, 건물수량이 가장 높았던 예취기는 5월 25일 이었다. 3. 파종량이 많을 수록 그리고 예취시기가 늦을수록조단백질, 가급태단백질 및 가소화단백질 함량은 감소하였으며, 반면에 조섬유함량(ADF와 NDF)은 증가하였다. 4. 파종량이 많을 수록 그리고 예취시기가 늦을수록 총가소화영양분(TDN) 함량과 상대적 사료가치는 감소하였다. TDN 수량은 파종량 18-28kg/10a, 5월 15-25일 수확시 가장 높았다. 5. 호밀의 에너지 함량은 파종량이 많을수록 그리고 예취시기가 늦을수록 감소하나, 단위면적당 에너지 생산량은 ENE와 NEL은 23kg/10a 파종-5월 15일 수확할때, NEM은 18kg/10a 파종-5월 15일 수확할때 가장 높았다. NEG는 18-28kg/10a 파종-5월 5일 수확할 때 가장 높았다.

• 분석과 대안
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• 제6권2호
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• pp.155-183
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• 2022

본 연구는 통제집단 합성법(Synthetic Control Method, SCM)을 사용해 518민주화운동이 광주/전남지역에 미친 부정적 충격을 계량경제학적으로 분석하는 것을 목적으로 하고 있다. 통제집단 합성법은 미시계량경제학의 이중차분법과 유사한 방법론으로 국가, 지역 등의 거시집계변수들에 적용하여 특정 사건의 인과관계 규명을 위해 처치집단과 통제집단의 사건 이후의 성과차이를 계량하는 데이터 중심 추계 방법론이다. 본 연구에서는 1980년 기준 광역 지방자치 단체의 지방세수 자료를 지역의 경제력에 대한 대리변수로 하고 여러 사회 경제적 지표를 통해 518민주화운동이 광주/전남 지역의 경제에 미친 영향을 분석했다. 본 연구에서는 1971년부터 2000년까지 자료를 사용하여 분석하였는데 실증 분석 결과 1980년을 기준으로 최대 17%까지 광주/전남 지역의 지방세수가 정상 경로와 비교하면 덜 걷혔다고 분석할 수 있었다. 또한 통제집단 합성법의 강건성 분석 방법인 시점이동 위약효과 분석과 공간이동 위약효과 분석을 통해서도 이러한 분석의 유의함을 확인할 수 있었다.

• Journal of the korean society of oceanography
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• 제32권2호
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• pp.63-68
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• 1997

Stable isotope profiles with fine-scale resolution were constructed from the fossil mollusk shells, Mercernaria mercernaria, obtained from the late Pleistocene transgressive deposits of Gomez Pit, Virginia, USA. Incremental sampling were made along the axis of maximum growth to provide high-resolution ${\delta}^{18}$O and ${\delta}^{13}$C records. The ${\delta}^{18}$O shell profiles exhibit a series of pronounced cycles in the overall amplitude, corresponding to strong seasonal variations in temperature, which is apparently positive environmental variable. Contrasts between the patterns of ${\delta}^{18}$O and ${\delta}^{13}$C profiles reflect the relationship influencing the seasonal carbon cycling in the shallow marine environment. Positive anomalies of the ${\delta}^{13}$C values during the summer were observed to be out of phase with the ${\delta}^{18}$O profile. Such relatively heavier carbon source may be alternated due to seasonal methanogenesis during the summer. A hypothesized methane-based system may be operated in the shallow and marginal marine environment, resulting in a ${\delta}^{13}$C enriched bicarbonate pool, in which the heavier isotope seems to be incorporated to the shell carbonate.

• The Korean Journal of Physiology and Pharmacology
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• 제12권2호
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• pp.65-71
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• 2008

The present study examined the inhibitory effect of licorice compounds glycyrrhizin and a metabolite $18{\beta}$-glycyrrhetinic acid on the neurotoxicity of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) in the mouse and on the 1-methyl-4-phenylpyridinium ($MPP^+$)-induced cell death in differentiated PC12 cells. MPTP treatment increased the activities of total superoxide dismutase, catalase and glutathione peroxidase and the levels of malondialdehyde and carbonyls in the brain compared to control mouse brain. Co-administration of glycyrrhizin (16.8 mg/kg) attenuated the MPTP effect on the enzyme activities and formation of tissue peroxidation products. In vitro assay, licorice compounds attenuated the $MPP^+$-induced cell death and caspase-3 activation in PC12 cells. Glycyrrhizin up to $100{\mu}M$ significantly attenuated the toxicity of $MPP^+$. Meanwhile, $18{\beta}$-glycyrrhetinic acid showed a maximum inhibitory effect at $10{\mu}M$; beyond this concentration the inhibitory effect declined. Glycyrrhizin and $18{\beta}$-glycyrrhetinic acid attenuated the hydrogen peroxide- or nitrogen species-induced cell death. Results from this study indicate that glycyrrhizin may attenuate brain tissue damage in mice treated with MPTP through inhibitory effect on oxidative tissue damage. Glycyrrhizin and $18{\beta}$-glycyrrhetinic acid may reduce the $MPP^+$ toxicity in PC12 cells by suppressing caspase-3 activation. The effect seems to be ascribed to the antioxidant effect.

• Journal of Forest and Environmental Science
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• 제34권1호
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• pp.71-76
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• 2018

The long-tailed goral (Naemorhedus caudatus) has slowly recolonized habitats in South Korea. Because it is necessary to know the status of groups in recolonized areas, we determined detection frequencies and group sizes using camera trapping, a non-invasive monitoring method. In Uljin, a far southern goral habitat in South Korea, we used a Moultrie 5.0 camera and mineral block as bait during the breeding season in BaekAm Mountain (148 days, 18 May to 11 October) and Geumjong Mountain (63 days, 18 May to 18 July) in 2010. Totally, 155 images were captured in BaekAm Mountain, whereas four images were captured in Geumjong Mountain. The species was most frequently detected at sunrise (05:00-08:00) and sunset (18:00-20:00). Through population structure evaluation, we identified at least 11 individuals, including one solitary mature male, four females, four kids, and two solitary subadults in BaekAm Mountain. However, in Geumjong Mountain, we identified only two individuals (female with kid). Monitoring efficiency in the recolonized area differed depending on population density and habitat conditions. Because we could evaluate the population structure, and behavioral patterns in the study sites, monitoring using camera traps could be applied for the recolonized habitats in South Korea.

• 한국언론정보학보
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• 제58권
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• pp.130-153
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• 2012

지난 30년간 한국의 정치 변동 과정에서 5.18 담론은 가장 논쟁적인 이슈 중 하나였다. 이 연구의 목적은 한국의 대표적 신문 중의 하나인 "동아일보"를 대상으로 그 지면에 나타난 5.18 담론의 주요 특징과 변화 양상을 살피고, 한국의 정치 사회적 맥락과는 어떠한 연관을 맺고 있는지를 밝히는 것이다. 구체적으로 이 연구에서는 "동아일보" 지면에 나타난 5.18 관련 용어에 대한 분석과 사설 보도에 대한 질적 담론 분석을 통해서 1980년부터 2008년까지 "동아일보"가 구성하고 있는 5.18 담론을 분석하였다. 분석 결과 "동아일보"에서 5.18을 지칭하는 용어는 초기 지배적 용어로 광주사태가 사용되다가 1983년 유화국면 이후 광주민중항쟁, 광주학살, 광주항쟁, 광주의거와 같은 대항담론의 용어들이 차례로 등장하고, 1989년 이후 광주민주화운동이 지배적 용어로 자리를 잡게 되는 것으로 나타났다. 그리고, "동아일보" 사설의 5.18 담론은 비극적 사태 담론, 진상규명 담론, 명예 회복 담론, 역사 심판 담론, 적극적 처벌 담론, 정치담론화의 순으로 전개가 된 것으로 나타났다. 이러한 "동아일보"의 5.18 담론 변화는 한국사회의 사회 정치적 변동과 밀접한 관련을 맺고 있는 것으로 분석되었으며, "동아일보" 스스로 5.18 담론의 변화를 주도하기보다는 지배담론의 변화가 발생한 후 이를 반영하며 새로운 지배담론을 공식화하는 역할을 하고 있는 것으로 분석되었다.

• Genomics & Informatics
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• 제20권2호
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• pp.18.1-18.7
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• 2022

According to long-term projections, by 2030, the world's population is predicted to reach 7.5 billion individuals, and there will be roughly 27 million new cancer cases diagnosed. The global burden of breast cancer (BC) is expected to rise. According to the Ministry of Health-Iraqi Cancer Registry, cancer is the second largest cause of death after cardiovascular disease. This study investigated the interleukin-18 (IL18) single-nucleotide polymorphisms (SNPs) -607C/A rs1946518 and -137G/C rs187238 using the sequence-specific amplification-polymerase chain reaction approach. Regarding the position -607C/A, there was a highly significant difference between the observed and expected frequencies in patients and controls (χ² = 3.16 and χ² = 16.5), respectively. The AA and CA genotypes were associated with significantly increased BC risk (odds ratio [OR], 3.68; p = 0.004 and OR, 2.83; p = 0.04, respectively). Women with the A allele had a 5.03-fold increased susceptibility to BC. The C allele may be a protective allele against BC (OR, 0.19). Although position -137G/C showed no significant differences in the CC genotype distribution (p = 0.18), the frequency of the CC genotype was significantly higher in patients than in controls. In contrast, patients had a significantly higher frequency of GC genotypes than controls (p = 0.04), which was associated with an increased risk of developing BC (OR, 2.63). The G allele frequency was significantly lower in patients than in controls (55.0% vs. 76.2%, respectively). This SNP may be considered a common genotype in the Iraqi population, with the wild-type G allele having a protective function (OR, 0.19) and the mutant C allele having an environmental effect (OR, 2.63).

• Nuclear Medicine and Molecular Imaging
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• 제42권sup1호
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• pp.137-139
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• 2008

Wilms Tumor is a great therapeutic success story within pediatric oncology. Therefore, accurate initial staging is needed to assess tumor spread and to assign patients appropriately to the different risk branches. However, it is recognized that FDG-PET can provide useful information about tumor and has better accuracy than CT and MRI for staging, but its role in Wilms tumor is unclear. According to clinical research data, FDG PET may be useful for the management of selected patients with Wilms tumors.

• 대한의용생체공학회:의공학회지
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• 제32권1호
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• pp.74-78
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• 2011

Although recent studies have shown the usibility of [F-18]FDG small animal Positron Emission Tommography (PET) as a functional neuroimaging technique in behavioural small animal study, researches showing the detection power of functional changes in the brain are still limited. Thus, in the study, we performed [F-18]FDG small animal PET neuroimaging in the well-established fear behavioural experiment. Twelve rats were exposed on cat for 30 minutes after the [F-18]FDG injection. As a result, the brain activity in bilateral amygdala areas significantly increased in the fear condition. In addition, the fear condition evoked the functional activities of hypothalamus, which seemed to be related to the response to stress. These clear localization of fear related brain regions may reflect that a functional neuroimaging technique using [F-18]FDG small animal PET has functional detectibility enough to be applied in small animal behavioral research.

• 약학회지
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• 제32권1호
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• pp.62-69
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• 1988

We have studied the effect of fasting on $Na^+$, $K^{+}-ATPase$ activities in the rat intestinal mucosa. Rats were fasted for $18{\sim}48hr$. Intestinal microsomal fraction was prepared by the method of Robinson and ATPase activities were determined by the modified method of Fiske and Subbarow. $Na^+$, $K^{+}-ATPase$ activity was not changed after fasting for 18 and 24 hr but significantly decreased after fasting for 48 hr. Fasting over 18 to 48 hr period had no effect on the $Mg^{++}-ATPase$. Thus, it may be concluded that 48 hr fasting has inhibitory effect on rat intestinal absorptive capabilities. In order to study the effect of Ginseng on the $Na^+$, $K^{+}-ATPase$ activities of the small intestine in chronic $K^{+}-depleted$ rats, rats were fed $K^{+}-depleted$ diets for 3 weeks and Ginseng ethanol extracts were administered orally for 3 weeks concomitantly. ATPase activity was measured by the same method as fasting group. $Na^+$, $K^{+}-ATPase$ activity in the $K^{+}-depleted$ diet group was increased and Ginseng ethanol extracts inhibited the increase of enzyme activity induced by $K^{+}-depleted$ diet. Thus, it may be suggested that increase in the intestinal $Na^+$, $K^{+}-ATPase$ activity of chronic $K^{+}-depleted$ group may be due to the compensatory mechanism and administration of Ginseng with $K^{+}-depleted$ diet may be associated with inhibition of increase in the enzyme activity of the $K^{+}-depleted$ group due to the prevention of the $K^+$ loss in the $K^{+}-depletion$.