排序方式： 共有58条查询结果，搜索用时 875 毫秒
1.
Minimal Set of Metabolic Pathways Suggested from the Genome of Onion Yellows Phytoplasma 总被引：1，自引：0，他引：1
2.
Hyeryoung JEONG Hanbin LEE Jaihyun JUNG Hyunryung KIM Jin YU Hyounglok YOON Youngjae LEE Jinhwa CHANG Dongwoo CHANG 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(4):581
Unlike echocardiography, cardiac magnetic resonance imaging (cardiac MRI) results in a near-exact assessment of cardiac structures and function. However, most veterinary studies have focused on dogs with normal cardiac function. We hypothesized that there would be significant differences in cardiac measurements between cardiac MRI and echocardiography when left ventricular (LV) function was abnormal. This study was undertaken to compare measurements of LV function produced by cardiac MRI and echocardiography in dogs whose LV function was altered by pharmacological agents. This study was conducted with six healthy beagle dogs. We increased left ventricular contractility by administration of dobutamine; we decreased cardiac contractility with esmolol. Stroke volume measurements were made by using both cardiac MRI and echocardiography under seven different conditions with general anesthesia: control, three doses of esmolol (100, 200, and 500 µg/kg/min), and three doses of dobutamine (10, 20, and 50 µg/kg/min). Experiments involving each condition were conducted at least 1 week apart. When LV contractility was normal, ejection fraction (EF) and stroke volume (SV), as measured by echocardiography and cardiac MRI, were not significantly different. However, when contractility was changed by pharmacological agents, EF and SV were overestimated by echocardiography, compared to MRI. Evaluation of cardiac function in patients treated with pharmacological agents should be conducted carefully because EF and SV measured by echocardiography can be overestimated, compared with EF and SV obtained by cardiac MRI. 相似文献
3.
4.
Are We Moving Back to the City? Examining Residential Mobility in the Washington,DC Metropolitan Area 总被引：1，自引：0，他引：1
This research assesses the extent to which there is evidence of population re‐centralization or back to the city moves by tracking the historical trend of household and income mobility in the Washington, DC metropolitan area. County‐to‐county migration data and four migration efficiency measures are used to investigate net flows of households and income in the region. The results show a nascent tendency of back to the city movement; however, the redistribution of households and income in the metropolitan area is more complex. While the region's core may be starting to gain households and income, there are still significant flows into the region's most distant suburbs. The results of this research have implications for transportation, housing, and economic development policy making in Washington, DC and other regions. The study also offers a unique example of how to study household and income redistribution within U.S. metropolitan areas. 相似文献
5.
MIHYUN CHOI NAMSOON LEE JUNYOUNG KIM KANGJAE YI JOOHYUN JUNG JUNGHEE YOON MINCHEOL CHOI 《Veterinary radiology & ultrasound》2011,52(6):648-652
A modified double contrast barium enema using carboxymethylcellulose was evaluated in beagle dogs and compared with dogs receiving a conventional barium enema. The experimental group was divided into three groups (1, 2, and 3) and given 30 ml/kg of different volume ratios of a barium vs. carboxymethylcellulose mixture. Each group underwent sonography following radiography. The volume ratio of one part barium to three parts carboxymethylcellulose was judged to be the optimal mixture, resulting in a general distribution of contrast and bowel radiolucency on radiographs and adequate postradiography sonography. The modified barium enema using carboxymethylcellulose is useful for assessing the general morphology and mucosal layers of the colon simultaneously on radiographs and ultrasonographs. 相似文献
6.
Unsuccessful Cyclosporine plus Prednisolone Therapy for Autoimmune
Meningoencephalitis in Three Dogs
7.
Impact of rewilding,species introductions and climate change on the structure and function of the Yukon boreal forest ecosystem 
下载免费PDF全文
下载免费PDF全文 Rudy BOONSTRA Stan BOUTIN Thomas S. JUNG Charles J. KREBS Shawn TAYLOR 《Integrative zoology》2018,13(2):123-138
Community and ecosystem changes are happening in the pristine boreal forest ecosystem of the Yukon for 2 reasons. First, climate change is affecting the abiotic environment (temperature, rainfall and growing season) and driving changes in plant productivity and predator–prey interactions. Second, simultaneously change is occurring because of mammal species reintroductions and rewilding. The key ecological question is the impact these faunal changes will have on trophic dynamics. Primary productivity in the boreal forest is increasing because of climatic warming, but plant species composition is unlikely to change significantly during the next 50–100 years. The 9–10‐year population cycle of snowshoe hares will persist but could be reduced in amplitude if winter weather increases predator hunting efficiency. Small rodents have increased in abundance because of increased vegetation growth. Arctic ground squirrels have disappeared from the forest because of increased predator hunting efficiency associated with shrub growth. Reintroductions have occurred for 2 reasons: human reintroductions of large ungulates and natural recolonization of mammals and birds extending their geographic ranges. The deliberate rewilding of wood bison (Bison bison) and elk (Cervus canadensis) has changed the trophic structure of this boreal ecosystem very little. The natural range expansion of mountain lions (Puma concolor), mule deer (Odocoileus hemionus) and American marten (Martes americana) should have few ecosystem effects. Understanding potential changes will require long‐term monitoring studies and experiments on a scale we rarely deem possible. Ecosystems affected by climate change, species reintroductions and human alteration of habitats cannot remain stable and changes will be critically dependent on food web interactions. 相似文献
8.
Sung Dae LEE Hoi Yun KIM Hyun Jung JUNG Sang Yun JI Rekha CHOWDAPPA Ji Hee HA Young Min SONG Jun Cheol PARK Hong Kil MOON In Cheul KIM 《Animal Science Journal》2009,80(1):79-84
The objective of the present study was to investigate the effect of fermented apple diet (FAD) supplementation on the growth performance and meat quality in finishing Berkshires. The FAD was made from dropped apple mixed with rice bran and barley bran. Until 81 ± 1 kg live weight at 133 ± 1 days, the animals were fed a growing diet, after which experimental samples were fixed at 0, 2, 4 and 6% FAD as C, T1, T2 and T3 in the finishing diets. Growth performance, ADG, ADFI and feed efficiency were improved in T1 than other groups. In carcass parameters, carcass weight was higher ( P < 0.05) in T1 than in other groups. In meat quality, moisture and crude protein contents decreased ( P < 0.05) by addition of FAD. pH24 and WHC were higher ( P < 0.05) in T1 than other groups. In sensory evaluation, marbling of fresh meat and tenderness, juiciness, flavor and overall acceptability of cooked meat were improved by the addition of FAD. According to the results of our experiment, FAD can be used for improvement of meat quality parameters. 相似文献
9.
BYEONG-TECK KANG KI-JIN KO DONG-PYO JANG JAE-YONG HAN CHAE-YOUNG LIM CHUL PARK JONG-HYUN YOO JU-WON KIM DONG-IN JUNG YOUNG-BO KIM EUNG-JE WOO ZANG-HEE CHO HEE-MYUNG PARK 《Veterinary radiology & ultrasound》2009,50(6):615-621
The purpose of this study was to describe relevant canine brain structures as seen on T2-weighted images following magnetic resonance (MR) imaging at 7 T and to compare the results with imaging at 1.5 T. Imaging was performed on five healthy laboratory beagle dogs using 1.5 and 7 T clinical scanners. At 1.5 T, spin echo images were acquired, while gradient echo images were acquired at 3 T. Image quality and conspicuity of anatomic structures were evaluated qualitatively by direct comparison of the images obtained from the two different magnetic fields. The signal-to-nose ratio (SNR) and contrast-to-noise ratio (CNR) were calculated and compared between 1.5 and 7 T. The T2-weighted images at 7 T provided good spatial and contrast resolution for the identification of clinically relevant brain anatomy; these images provided better delineation and conspicuity of the brain stem and cerebellar structures, which were difficult to unequivocally identify at 1.5 T. However, frontal and parietal lobe and the trigeminal nerve were difficult to identify at 7 T due to susceptibility artifact. The SNR and CNR of the images at 7 T were significantly increased up to 318% and 715% compared with the 1.5 T images. If some disadvantages of 7 T imaging, such as susceptibility artifacts, technical difficulties, and high cost, can be improved, 7 T clinical MR imaging could provide a good experimental and diagnostic tool for the evaluation of canine brain disorders. 相似文献
10.
目的揭示同一CAP产地鱼腥草株间的基因多态性规律,为中药稳态提取工艺中最小投料量研兄莫定基础〔方法对同一CAP产地46株鱼腥草进行ISSR和RAPD分子标记,应用NTSYS2PC软件进行聚类分析〔结果将筛选出的9条ISSR引物及8条RAPD引物扩增后分别得到134和101条带,其中呈多态性的条带数为115,72条,多态比率为85.80Ic,71.30Ic,平均遗传相似系数为0.678 6,0.694 7结论两种分子标记结果均揭示了同一CAP产地鱼腥草株间基因多态性规律,阐明了引起同一CAP产地鱼腥草株间质量不稳定的内在原因,为中药材质量稳定性控制和中药稳态提取工艺中最小投料量研兄提供实验依据、 相似文献