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1204篇 您的检索式:作者名="FRANCIS S"
    题名 作者 年代 出处 被引量
1水稻田农药喷雾上层植株雾滴截留影响的试验研究显示文摘精确喷施农药的效果取决于喷施药液在农作物 (靶标 )上的有效沉积。研究作物上层枝叶对农药的雾滴截留 ,为喷雾器具的优化设计、性能改进以及正确使用等提供技术依据 ;对合理喷施农药、提高农药的利用率、减少农药污染、保障食品安全具有重要意义。本试验研究以染料Rhodamine -B溶解成一定浓度的溶液代替农药对水稻田进行喷雾。用采样架沿水稻高度方向分 3层采集水稻植株样品。用荧光分光光度计测定雾滴在水稻某一层间的沉积量。本试验研究提出了定量分析上层水稻植株叶面截留对雾滴沉积影响的方法 ,分别对早稻与晚稻进行了试验。结果表明 :在按距离地面 40cm以上、2 0~ 40cm之间、5~ 2 0cm之间对水稻分层时 ,上层水稻植株的雾滴截留对中层、底层水稻植株雾滴沉积影响的比例系数分别为 :-0 .6615 (早稻为 -0 .7493 )、-0 .3 3 86(早稻为 -0 .2 5 11) ;对地面雾滴损失影响的比例系数为 -1.14 41。提出了喷雾沉积的不均匀系数。试验结果表明 ,上层水稻枝叶对雾滴截留不会改善中层及底层水稻植株喷雾沉积的均匀性。宋淑然 王卫星 洪添胜 王平 罗锡文 Sinfort Carde Tisseyre Bruno Sévila Francis 2003农业工程学报2003,19,6:28
2Impact of overgrazing on the transmission of Echinococcus multilocularis in Tibetan pastoral communities of Sichuan Province,China显示文摘背景过度放牧被假定增加是包虫 multilocularis 的中间的主人的小哺乳动物的人口密度,在 Qinghai 西藏高原的牙槽的包虫病的病原体。这研究测试了过度放牧可能支持的假设通过增加小哺乳动物的人口的包虫 multilocularis 传播,在擦伤惯例的西藏的牧剧 communities.Methods 的中间的主人,小哺乳动物索引和狗包虫 rnultilocularis 感染数据被收集分析在用的 nonpararnetric 测试和多重逐步的逻辑 regression.Results 过度放牧和包虫 rnultilocularis 传播之间的关系调查一公社的牧场存在,可得到的牧草为放牧是缺乏的。开(普通) 牧场被过度放牧并且与附近的 fenced 相比有小哺乳动物的更高的洞穴密度(私人) 牧场;由附近的 fenced 区域测量的开的牧场上的这个高过度放牧压力在开的牧场导致了小哺乳动物的更高的洞穴密度。在开的牧场的小哺乳动物的中部的洞穴密度独立地与附近犬的包虫 multilocularis 感染被联系(P=0.003, OR=1.048 ) 过度放牧的 .Conclusion 可以通过增加小哺乳动物的人口密度支持包虫 multilocularis 的传播。WANG Qian XIAO Yong-fu Dominique A Vuitton Peter M Schantz Francis Raoul Christine Budke Maiza Campos-Ponce Philip S Craig Patrick Giraudoux 2007Chinese Medical Journal2007,,3:20
3水稻田农药喷雾分布与雾滴沉积量的试验分析显示文摘借助于荧光分光光度计测定出雾滴在水稻某一区域的沉积量 ,由此获得雾滴沉积量在水稻植株不同层间分布的规律。结果表明 :在按距离地面 4 0 cm以上、2 0~ 4 0 cm之间、5~ 2 0 cm之间对水稻分层时 ,层间的雾滴沉积量与水稻的高度成正比。采用 Matlab,对试验点上拍摄到的照片进行分析 ,建立了雾滴沉积量与对应的水稻植株面积间的相互关系。宋淑然 洪添胜 王卫星 张和兴 罗锡文 Sévila Franci 2004农业机械学报2004,35,6:17
4Complex role for the immune system in initiation and progression of pancreatic cancer显示文摘The immune system plays a complex role in the development and progression of pancreatic cancer. Inflammation can promote the formation of premalignant lesions and accelerate pancreatic cancer development. Conversely, pancreatic cancer is characterized by an immunosuppressive environment, which is thought to promote tumor progression and invasion. Here we review the current literature describing the role of the immune response in the progressive development of pancreatic cancer, with a focus on the mechanisms that drive recruitment and activation of immune cells at the tumor site, and our current understanding of the function of the immune cell types at the tumor. Recent clinical and preclinical data are reviewed, detailing the involvement of the immune response in pancreatitis and pancreatic cancer, including the role of specific cytokines and implications for disease outcome. Acute pancreatitis is characterized by a predominantly innate immune response, while chronic pancreatitis elicits an immune response that involves both innate and adaptive immune cells, and often results in profound sys-temic immune-suppression. Pancreatic adenocarcinoma is characterized by marked immune dysfunction driven by immunosuppressive cell types, tumor-promoting immune cells, and defective or absent inflammatory cells. Recent studies reveal that immune cells interact with cancer stem cells and tumor stromal cells, and these interactions have an impact on development and progression of pancreatic ductal adenocarcinoma(PDAC). Finally, current PDAC therapies are reviewed and the potential for harnessing the actions of the immune response to assist in targeting pancreatic cancer using immunotherapy is discussed.Kristin S Inman Amanda A Francis Nicole R Murray 2014World Journal of Gastroenterology2014,20,32:11
5Screening and Surveillance for the Early Detection of Colorectal Cancer and Adenomatous Polyps, 2008: A Joint Guideline From the American Cancer Society, the US Multi-Society Task Force on Colorectal Cancer, and the American College of Radiology显示文摘Bernard Levin David A. Lieberman Beth McFarland Kimberly S. Andrews Durado Brooks John Bond Chiranjeev Dash Francis M. Giardiello Seth Glick David Johnson C. Daniel Johnson Theodore R. Levin Perry J. Pickhardt Douglas K. Rex Robert A. Smith Alan Thorson S 2008Gastroenterology2008,,5:8
6A Hepatocellular Carcinoma 5-Gene Score Associated With Survival of Patients After Liver Resection显示文摘Jean–Charles Nault Aurélien De Reyniès Augusto Villanueva Julien Calderaro Sandra Rebouissou Gabrielle Couchy Thomas Decaens Dominique Franco Sandrine Imbeaud Francis Rousseau Daniel Azoulay Jean Saric Jean–Frédéric Blanc Charles Balabaud Paulette Bioulac 2013Gastroenterology2013,,1:3
7ECG Criteria to Identify Epicardial Ventricular Tachycardia in Nonischemic Cardiomyopathy显示文摘Ermengol Vallès Victor Bazan Francis E. Marchlinski 2010Circulation: Arrhythmia and Electrophysiology2010,,1:2
8Health Professional Guide to Rehabilitation of the Patient with Osteoporosis显示文摘Francis J Bonner FJ Jr Mehrshed S 2003Osteoporos Int2003,14,2:2
9同种异体富血小板血浆用于关节软骨衍生的软骨形成的支架显示文摘软骨的有限自我恢复能力使得必须使用基于细胞和组织工程的疗法。关节软骨衍生的软骨形成剂(CP)的分离、扩展和表征的最新进展,已经在其软骨修复的作用中得到普及。富血小板血浆(PRP)是用于体外和体内研究的可靠的生物支架,已报道在软骨和骨疾病的治疗中得到应用。Vinod E Vinod Francis D ManickamAmirtham S 赵泽亮 2019中国口腔颌面外科杂志2019,17,2:2
10Community-acquired Meticillin-resistant Staphylococcus Aureus: an Emerging Threat显示文摘Zetola N Francis J S Nuermberger E L 2005Lancet Infect Dis2005,5,5:1
11Plant responses of ultra narrow row cotton to nitrogen fertilization显示文摘MCCONNEL J S Francis P B Stark C R 2008Journal of Plant Nutrition2008,31,:1
12Antinutri- tional factors present in plant-derived alternate fish feed ingredients and their effects in fish 显示文摘FRANCIS G MAKKAR H P S KLAUS B K 2001Aquaculture2001,199,:1
13Alkali Reductive Roasting of Ilmenite Ore显示文摘El-Tawil S Z Mosri I M Yehia A Francis A A 1996Canadian Metallurgical Quarterly1996,35,1:1
14Detection of growth factors and protooncogene mRNA in the growing tip of red deer antler using reversetranscriptase polymerase chain reaction显示文摘Francis S M Suttie J M 1998J Exp Zool1998,281,1:1
15Wind erosion effects on nutrient redistribution and soil productivity显示文摘Francis J Larney Murray S Bullock H Henry Janzen 1998Journal of Soil and Water Conservation1998,53,2:1
16Testing for deliberate underpricing in the IPO premarket :a stochastic frontier approach 显示文摘HUNT-MCCOOL J KOH S C FRANCIS B B 1996Review of Financial Studies1996,9,4:1
17Evidence for Abstract, Schematic Knowledge of Three Spatial Diagram Representations 显示文摘Novick L R Hurley S M Francis M 1999Memory Cognition1999,27,2:1
18Barrier Lyapunovfunctions for the control of output-constrained nonlin-ear systems 显示文摘Keng P T Ge S S Francis E H 2009Automatica2009,45,4:1
19Ultrasound accelerates transport of recombinant tissue plasminogen activator into clots显示文摘Francis CW Blinc A Lee S 0,,:1
20Micro air vehicles-toward a new dimension in flight显示文摘McMichael J M Francis M S 0,,:1
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