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        검색결과 27

        1.
        2024.04 구독 인증기관·개인회원 무료
        최근 이상기후 및 기후변화로 인해 농작물 병해충 발생이 증가하고 발생양상 또한 다양해지고 있으며, 국제 무역 및 해외 여행객 증가로 인한 외래 병해충 유입 위험성이 높아지고 있는 추세이다. 특히 대표적인 비래해충 중의 하나인 벼멸구(Nilaparvata lugens Stål, 1854)의 발생 범위, 출현율 및 빈도수가 꾸준히 증가하여 피해를 호소 하는 농가들이 많아진 반면, 이들에 대한 대응책은 피해발생의 불규칙성, 이전 자료의 부족 및 불명확성으로 인해 미비한 실정이다. 본 연구에서는 이러한 문제를 대비해 벼멸구의 온도발육모형을 이용하여, 기상자료, NCPMS와 더불어 연발생 횟수와 분포 가능 범위 및 발생 시기를 예측하였다. 또한, 벼멸구의 발생량이 많았던 충남 예산, 경남 사천, 진주의 최초발생일, 최초비래일, 최고발생일, 발생최성일 기준으로 각각 발육영점온도 및 유효적산온도를 적용하여 세대별 발생시기를 예측하였다. 최초발생일과 최초비래일은 예산 7월 9일, 7월 16일, 사천 7월 2일, 7월 19일, 진주 7월 26일, 7월 26일로 나타났으며, 최초발생일과 최초비래일 사이를 초발생일 로 적용하면 다음세대 발생이 실제 조사한 지역별 최고발생일인 예산 9월 7일, 사천 8월 9일, 진주 8월 8일과 근접 한 시기로 추정되어 효과적임을 알 수 있었다.
        3.
        2021.09 KCI 등재후보 구독 인증기관 무료, 개인회원 유료
        Naturally occurring left ventricular hyperplasia is a rare but lethal disease. There are very few reports of this cardiac disease in captive nonhuman primates. In a colony of Macaca mulatta (Rhesus monkey) at California National Primate Research Center, a large number of rhesus macaques were diagnosed by autopsy with naturally occurring left ventricular hypertrophy without obvious underlying diseases over a 22-year period. The confirmatory diagnosis of ventricular hypertrophy was based on findings of notable left ventricular concentric hypertrophy with reduced left ventricular lumen, which is very similar to human ventricular hypertrophy cases. This report discusses an 11-year-old Macaca fascicularis monkey (Cynomolgus monkey, crab-eating macaque), weighing 2.95 kg, that was presented for enrollment in a pharmacokinetic (PK) study. During the PK experiment, the monkey died following a sudden decrease in percutaneous oxygen saturation and heart rate. Gross and histological examinations of the heart were performed. On gross pathology, the left ventricular wall was thickened, and the chamber lumen was reduced. In histopathological examination using hematoxylin- eosin and Masson-trichrome stains, fibrosis and myocyte disarray were not observed, but an increased cell density, compared to the normal heart, was confirmed. The autopsy results confirmed left ventricular hyperplasia as the major cause of death.
        4,000원
        4.
        2019.12 KCI 등재후보 구독 인증기관 무료, 개인회원 유료
        This study aimed to examine the effect of a mild elevation in serum cholesterol level in a porcine coronary overstretch restenosis model using a balloon angioplasty catheter or drug-eluting coronary stent. Pigs were divided into two groups and were fed a commercial normal diet (CND, n = 4) or a high-fat diet (HFD, n = 4) for 5 weeks. Coronary overstretch injury by balloon angioplasty or stent implantation was induced in the left anterior descending and left circumflex artery after 1 week of feeding. Histopathological analysis was performed at 4 weeks after coronary injury. During the experiment, the total cholesterol level in the HFD group increased by approximately 44.9% (from 65.9 ± 3.21 mg/dL at baseline to 95.5 ± 9.94 mg/dL at 5 weeks). The lumen area in the CND group was reduced in comparison with that in the HFD group after balloon angioplasty. After stent implantation, the injury score showed no significant difference. There were significant differences in the neointimal area (2.7 ± 0.33 mm2 in the CND group vs. 3.3 ± 0.34 mm2 in the HFD group, p<0.05), lumen area (2.6 ± 0.54 mm2 in the CND group vs. 2.0 ± 0.33 mm2 in the HFD group, p<0.05), and percent area stenosis (52.0 ± 7.96% in the CND group vs. 62.4 ± 5.15% in the HFD group, p<0.05). Body weight change was not different between the two groups. Increased serum cholesterol level activated vascular smooth muscle cell proliferation in the porcine coronary overstretch model.
        4,000원
        5.
        2018.07 구독 인증기관·개인회원 무료
        Despite growing research interest in consumer health, well-being and beauty, little is known about factors influencing consumer purchase decisions for female fitness devices. This study focuses on Kegel exercises – exercise routines developed by Dr. Kegel to strengthen pelvic floor muscles – that are recommended by health professionals for patients experiencing health ailments such as urinary incontinence, sexual dysfunction, and dissatisfaction. Despite the benefits, women are not well aware of the role of pelvic floor muscles. The diffusion and acceptance of Kegel exercise and devices among women are likely determined by how comfortable women are about obtaining such benefits. For this reason, feminism should play an important role in shaping women’s desire to engage in Kegel exercises. Thus, this research investigates how feminism is related to Millennial women’s engagement with fitness products, particularly Kegel devices. Drawing on the literatures about sexuality, health, and marketing, we propose that feminism positively influences women’s health-related attitudes (i.e., attitudes towards fitness, fitness opinion leadership, attitude toward core strength, and desire to control sex life), which in turn positively impacts women’s fitness engagement. Fitness engagement, in turn, is expected to predict attitudes towards Kegel exercise and Kegel device purchase intentions. On the other hand, women’s attitudes toward core strength and desire to control sex life are proposed to have a direct, positive impact on attitude towards Kegel exercise. Analysis of PLS-SEM shows general support for the hypotheses. We discuss how interest in Kegel devices could, in turn, lead to positive effects on overall physical and psychological health and provide implications for marketing practitioners.
        6.
        2017.10 구독 인증기관·개인회원 무료
        The attraction of the tomato whiteflies Trialeurodes vaporariorum, to four type of traps combined with a colored stickyboard and an light emitting lamp was investigated in 2016 in an tomato greenhouse. The colors of the sticky boardswere yellow and the peak wavelengths of the light emitting traps were 470nm(blue), 590nm(yellow) and 450~625nm(white).The type of traps was designed to directly illuminate the plants with an light emitting lamp and set along the lowerpart of the crops whose each sticky board was directed to the plants. This experiments showed that T. vaporariorumadults on average preferred (p>0.05) traps in blue lights(110±3.2adults/trap) compared to traps in yellow lights (71±1.4adults/trap)and white light traps(45±1.1adults/trap). The blue light trap(470nm) showed the most attractive to T. vaporariorum adults,followed by a similarly attraction to the yellow light trap(590nm), whereas the control (no light trap) was little attractiveto T. vaporariorum adults.
        7.
        2014.10 구독 인증기관·개인회원 무료
        Insect pollinators of the endanger orchid Cypripedium japonicum were surveyed and identified during two years, as a part of a conservation project of the orchid at Jukyeup-san and Hwaak-san (Mt.), South Korea. In total 40 individuals of 16 species in 4 families were identified. The dominant family was Halictidae, and Lasioglossum exiliceps Vachal visited the most frequently C. japonicum during the surveys. The average visiting frequency was 2.5 individuals per hour and the highest 4.3, from 12:00 – 13:00 in a day. After 15:00 insects did not visit the flowers at all. However, all of the visiting insects were found to not carry a pollinium or pollens of the orchard on their bodies; pollen carryover by any of the visiting insects did not occur at all. The orchid seems to require certain pollinators in particular body thickness due to its unique pollination mechanism. The orchid has two exit route openings, around 1 cm in diametre, where the entrapped insects can exit and an anther is situated just in front of each opening. It was inferred that a pollen carrier should be around 1 cm in body thickness. Therefore, the candidate species as the proper pollen carriers can be Tetralonia nipponensis Perez, Xylocopa appendiculata circumvolans Smith and Bombus consobrinus Dahlbom among the surveyed visitors.
        11.
        2009.05 구독 인증기관·개인회원 무료
        A full genomic DNA microarray technique was employed to investigate the effects of Dongchunghacho on aortal and hepatic gene expression in apolipoprotein E knockout mice fed a high-fat/high-cholesterol diet. Male 8- week - old ApoE-/- mice were randomly divided into two groups, control(high cholesterol group; HC) and supplementation of Dongchunghacho (SD). All of the mice were fed a high-fet/high cholesterol diet with or without Dongchunghacho supplemented by 1% for 6 weeks. At first, lipid profile of the Dongchunghacho was measured by biochemical analysis. No differences were observed in serum triglyceride and total cholesterol levels between the two groups. Antigenotoxic effect of the Dongchunghacho was measured by the single cell gel electrophoresis assay (Comet assay) and quantified as % fluorescence in tail. Dongchunghacho supplementation decreased significantly leukocytic DNA damage and also there was a tendency of reduction in hepatic DNA damage in Dongchunghacho group compared with the control group. In up regulated genes in liver and aorta of the mice, genes with 0 to 2- fold difference in expression level between the two group (HD and SD) was very much more in liver than in aorta, on the contrary, those with 2-fold to 16-flod difference increased greatly rather in aorta than in liver. Also, almost the same results were observed in down regulated genes in liver and aorta between the two groups. These results suggested that supplementation of Dongchunghacho might be helpful in preventing leukocytic DNA damage induced by high fat diet, and has a more crucial roles in aortal gene expression.
        15.
        2014.02 KCI 등재 서비스 종료(열람 제한)
        This study was conducted to determine the effects of seed storage temperature and pre-treatment on seed ger-mination, seedling quality and vigor index of wild Trichosanthes kirilowii and Trichosanthes kirilowii var. japonica. As a resultthe highest germination rate of T. kirilowii was the 95% at seed stored in room temperature and then soaking for 24 hours indH₂O. And the highest germination rate of T. kirilowii var. japonica was 96% at seed stored in 2℃ and then soaking for 24hours in GA₃(100ppm). But the seed germination rate was non-significance in pre-treatment at seed stored in roomtemperature 2℃ .Seedlings of T. kirilowii and T. kirilowii var. japonica showed not only the best seedling quality but alsoseedling vigor index in seed stored at 2℃ and then soaking for 24 hours in GA₃(100ppm). In this research, T. kirilowii and T.kirilowii var. japonica seed were stored in room temperature or 2℃, and then sown in peat moss, seed germination rate wasmore than 90% and production of superior quality seedlings.
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