维普中文期刊产品整合服务
91篇 您的检索式:作者名="D. Fan"
    题名 作者 年代 出处 被引量
1Root Physiological and Morphological Characteristics of Two Rice Cultivars with Different Nitrogen-Use Efficiency显示文摘The variation in nitrogen (N) uptake by rice has been widely studied but differences in rice root morphology that may contribute to this variation are not completely understood. Field and greenhouse experiments were carried out to study N accumulation, root dry weights, total root lengths, root surface areas, and root bleeding rates of two rice cultivars, Elio with low N-use efficiency and Nanguang with high N-use efficiency. Low (1 mmol N L-1) and high (5 mmol N L-1) N applications were established in the greenhouse experiment, and the N rates were 0, 120, and 240 kg ha-1 in the field experiments at Jiangning and Jiangpu farms, Nanjing, China. The results showed that the N accumulation, root dry weight, total root length, and root surface area increased with an increase in N application. At the heading stage, N accumulation in the shoots and roots of Nanguang was greater than that of Elio in the field experiments and that of Elio at 5 mmol N L-1 in the greenhouse experiment. After the heading stage, N accumulation was higher for Nanguang at both 1 and 5 mmol N L-1 in the greenhouse experiment. The total root length and root surface area were significantly different between the two cultivars. Over the range of the fertilizer application rates, the root lengths of Nanguang at Jiangning Farm were 49%-61% greater at booting and 26%-39% greater at heading than those of Elio, and at Jiangpu Farm they were 22%-42% and 26%-38% greater, respectively. Nanguang had a greater root bleeding rate than Elio. It was concluded that the N-use efficiency of the two rice cultivars studied depended to a great extent on the root morphological parameters and root physiological characteristics at different growth stages.FAN Jian-Bo ZHANG Ya-Li D. TURNER DUAN Yin-Hua WANG Dong-Sheng SHEN Qi-Rong 2010Pedosphere2010,20,4:33
2Field trial of an HTS filter system on a CDMA base station显示文摘This paper presents the field trial results of a high temperature superconductor filter system (HTSFS) in a code division multiple access (CDMA) mobile communication base station (BTS) in Tangshan, China. The center frequency of the HTSFS is 830 MHz with 1.4% fractional bandwidth. The noise figure (NF) of the HTSFS, including connectors and cables, is 0.8 dB. The field trial results show that after the HTSFS was installed in the receiver front-end of a CDMA base station, the transmitting power of handset was decreased by 3.1 dB on average. Up to now, the HTSFS has been running steadily in the base station for more than 22 months, demonstrating the reliability and stability of the system.YIN ZheSheng WEI Bin CAO BiSong WANG Xin GUO XuBo ZHANG XiaoPing GAO LongMa PIAO YunLong ZHU MaFeng LIANG Yong WANG Fan H. PIEL B. AMINOV F. AMINOVA M. GETTA S. KOLESOV A. KNACK N. PUPETER D. WEHLER 2007Chinese Science Bulletin2007,52,2:7
3Effect of Land Cover Change on Soil Phosphorus Fractions in Southeastern Horqin Sandy Land, Northern China显示文摘In the past 50 years, large areas of the Horqin sandy land were afforested to prevent desertification. Although the afforestation policy appears successful, many people now doubt whether it is suitable to plant trees with high density on the poor soils in semiarid regions. Little is known about the impacts of afforestation on the sandy soil properties, although the evaluation of these impacts is fundamental to judge the rationality of afforestation policy. Soil phosphorus (P) fractions, acid phosphomonoesterase activities, and other soil chemical properties were compared among five adjoining typical ecosystems on poor sandy soils in southeastern Horqin sandy land. The ecosystems studied are natural elm savanna, degraded grassland, Mongolian pine (Pinus sylvestris var. mongolica) plantation, Chinese pine (Pinus tabulaeformis) plantation, and mixed plantation of Mongolian pine and poplar (Populus simonii). The results showed that organic P dominated soil P (47%–65%) was the principal source of available P. The degradation of elm savanna to grassland significantly reduced soil pH and resulted in an overall reduction in soil fertility, although slightly increased labile inorganic P. Grassland afforestation had no significant influence on soil pH, organic carbon, and total N but significantly reduced total P. Impacts of grassland afforestation on soil P fractions depended on tree species. Natural elm savanna had higher soil P conserving ability than artificial plantations. Therefore, with the aim of developing a sustainable ecosystem, we suggested that vegetations with low nutrient demand (particularly P) and effcient nutrient cycling would be more suitable for ecosystem restoration in the semiarid region.ZHAO Qiong ZENG De-Hui FAN Zhi-Ping D. K. LEE 2008Pedosphere2008,18,6:7
4In situ generated thrombin in the protein corona of zeolites: Relevance of the functional proteins to its biological impact显示文摘到 nanomaterial 表面的血浆蛋白质的吸附在他们的简历功能上有大影响。然而,有在在蛋白质日冕和材料的生物身份的功能的蛋白质之间的关系的有限理解。这里,我们证明在里面 situ 在 Ca 沸石表面的蛋白质日冕产生了凝血酵素显示一个钙依赖者,不平常地高(3,000 NIH U/mg ) procoagulant 活动,它对 antithrombin 释放是甚至稳定的。移开包含的 Ca < 啜 class= “ a-plus-plus ” > 在沸石的 2+ 由 antithrombin 导致释放。我们的观察建议凝血酵素活动能被无机的表面和阳离子调整。最重要地,我们的发现在蛋白质日冕和材料的 procoagulant 活动显示在 biomolecules 之间的连接,提供为沸石 hemostatics 的 procoagulant 机制的一个新分子的基础。Yunlong Li Xiaofeng Liao Xiaoxi Zhang Guicen Ma Shuai Zuo Liping Xiao Galen D. Stucky Zhugang Wang Xian Chen Xiaoqiang Shang Jie Fan 2014Nano Research2014,7,10:5
5环形截面螺旋管道内的粘性流动显示文摘根据张量分析,建立了非正交的曲线柱坐标系巾的N-S方程,采用摄动法求解环形截面螺旋管道内的粘性流动。结果表明:环形截面上存在二次流。章本照 D. N. Fan 1992力学学报1992,24,5:4
6Corrosion behaviour of bulk ultra-fine grained AZ91D magnesium alloy fabricated by equal-channel angular pressing显示文摘D. Song A.B. Ma J.H. Jiang P.H. Lin D.H. Yang J.F. Fan 2010Corrosion Science2010,,1:3
7COMPUTER SIMULATION OF NEURAL NETWORK CONTROL SYSTEM FOR CO_2 WELDING PROCESS显示文摘In this paper, neural network control systems for decreasing the spatter of CO2 welding have been created. The Generalized inverse Learning Architecture(GILA), the SPecialized inverse Learning Architecture(SILA)-I & H and the Error Back Propagating Model(EBPM) are adopted respectively to simulate the static and dynamic welding control processes. The results of simulation and experiment show that the SILA-I and EBPM have betted properties. The factors affecting the simulating results and the dynamic response quality have also been analyzed.D. Fan B. Li Y.Z. Ma and J.H. Chen (Welding Institute, Gansu University of Technology,Lanzhou 730050, China) 2000Acta Metallurgica Sinica(English Letters)2000,13,1:3
8Clinicopathological and Prognostic Characteristics of Hepatoid Adenocarcinoma of the Stomach显示文摘Jinlin Yang Rui Wang Wenyan Zhang Wen Zhuang Mojin Wang Chengwei Tang D. Fan 2014Gastroenterology Research and Practice2014,,:2
9Combined action of MK-801 and ceftriaxone impairs the acquisition and reinstatement of morphine-induced conditioned place preference,and delays morphine extinction in rats显示文摘Objective It is well established that glutamate and its receptors, particularly the N-methyl-D-aspartate receptor (NMDAR), play a significant role in addiction and that the inhibition of glutamatergic hyperfunction reduces addictive behaviors in experimental animals. Specifically, NMDAR antagonists such as MK-801, and an inducer of the expression of glutamate transporter subtype-1 (GLT-1) (ceftriaxone) are known to inhibit addictive behavior. The purpose of this study was to determine whether the combined action of a low dose of MK-801 and a low dose of ceftriaxone provides better inhibition of the acquisition, extinction, and reinstatement of morphine-induced conditioned place preference (CPP) than either compound alone. Methods A morphine-paired CPP experiment was used to study the effects of low doses of MK-801, ceftriaxone and a combination of both on reward-related memory (acquisition, extinction, and reinstatement of morphine preference) in rats. Results A low dose of neither MK-801 (0.05 mg/kg, i.p.) nor ceftriaxone (25 mg/kg, i.p.) alone effectively impaired CPP behaviors. However, when applied in combination, they reduced the acquisition of morphine-induced CPP and completely prevented morphine reinstatement. Their combination also notably impaired the extinction of morphine-induced CPP. Conclusion The combined action of a low dose of an NMDAR antagonist (MK-801) and GLT-1 activation by ceftriaxone effectively changed different phases of CPP behavior.Yaodong Fan Haichen Niu Joshua D. Rizak Ling Li Guimei Wang Liqi Xu He Ren Hao Lei Hualin Yu 2012Neuroscience Bulletin2012,28,5:2
10Deregulated expression of Notch receptors in human hepatocellular carcinoma显示文摘J. Gao Z. Song Y. Chen L. Xia J. Wang R. Fan R. Du F. Zhang L. Hong J. Song X. Zou H. Xu G. Zheng J. Liu D. Fan 2007Digestive and Liver Disease2007,,2:2
11Generation of nematic liquid crystal alignment with polyimides exposed to linearly polarized light of long wavelength显示文摘Y H Wang Y Z Chen Z W Lin H. D. Sun J. S. Fan 0,,:2
12MicroRNA-25 functions in regulation of pigmentation by targeting the transcription factor MITF in alpaca ( Lama pacos ) skin melanocytes显示文摘Z. Zhu J. He X. Jia J. Jiang R. Bai X. Yu L. Lv R. Fan X. He J. Geng R. You Y. Dong D. Qiao K.-B. Lee G.W. Smith C. Dong 2009Domestic Animal Endocrinology2009,,3:2
13Magnetic resonance studies of jets in a gas-solid fluidised bed显示文摘Magnetic resonance imaging (MRI) has been used to study the behaviour of jets at the distributor of a 50 mm diameter fluidised bed of 0.5 mm diameter poppy seeds. Two perforated-plate distributors were examined, containing either 10 or 14 holes, each 1 mm diameter. Ultra-fast MR imaging was able to show the transient nature of the upper parts of the jets, where discrete bubbles are formed. Imaging in 3D showed that the central jets were the longest for flow rates below minimum fluidisation. Above minimum fluidisation, the outer jets, nearest the wall of the fluidised bed, arched inward towards the central axis. In this latter case, interpretation of the time-averaged 3D image required the use of ultra-fast MR imaging to identify the approximate height above the distributor at which discrete bubbles were formed. The apparently continuous void extending along the central axis above this height in the time-averaged 3D image was thus identified, using ultra-fast MR imaging, as representing the averaged paths of released bubbles. Time-averaged MR velocity mapping was also used to identify dead zones of stationary particles resting on the distributor between the jets. The dead zones could be observed when the superficial velocity of the gas approached minimum fluidisation, but they were smaller than those observed at lower gas superficial velocity. Comparable images of a single jet through 1.2 mm diameter poppy seeds from MRI and electrical capacitance volume tomography (ECVT) are also demonstrated.Meenal Pore Thusara C. Chandrasekera Daniel J. Holland Aining Wang Fei Wang Qussai Marashdeh Michael D. Mantle Andrew J. Sederman Liang-Shih Fan Lynn F. Gladden John S. Dennis 2012Particuology2012,10,2:2
14Population development by phenotypic selection with subsequent marker-assisted selection for line extraction in cucumber (Cucumis sativus L.)显示文摘Zhicheng Fan Matthew D. Robbins Jack E. Staub 2006Theoretical and Applied Genetics2006,,5:2
15Association between H elicobacter pylori infection and the risk of colorectal neoplasia: a systematic review and meta‐analysis显示文摘Q. Wu Z.‐P. Yang P. Xu L.‐C. Gao D.‐M. Fan 2013Colorectal Dis2013,,7:2
16Meta‐analysis: effect of preoperative infliximab use on early postoperative complications in patients with ulcerative colitis undergoing abdominal surgery显示文摘Z. Yang Q. Wu F. Wang K. Wu D. Fan 2012Aliment Pharmacol Ther2012,,10:1
17Prognostic significance of osteopontin in hepatitis B virus-related hepatocellular carcinoma显示文摘H. Xie J. Song R. Du K. Liu J. Wang H. Tang F. Bai J. Liang T. Lin J. Liu D. Fan 2006Digestive and Liver Disease2006,,2:1
18查看详情显示文摘Wang D. J Fan L Zheng C. Y 0,,:1
19Densification of large-size spray-deposited Al–Mg alloy square preforms via a novel wedge pressing technology显示文摘Z.H. Chen C.H. Fan Z.G. Chen W. Li D. Chen 2008Materials Science & Engineering A2008,,1:1
20Sensitive optical biosensors for unlabeled targets: A review显示文摘Xudong Fan Ian M. White Siyka I. Shopova Hongying Zhu Jonathan D. Suter Yuze Sun 2008Analytica Chimica Acta2008,,1:1
返回顶部 每页显示:
共5页 首页 上一页 第1页 下一页 末页 /5 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费