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889篇 您的检索式:作者名="Feng D Q"
    题名 作者 年代 出处 被引量
1利用抗高血压药相关的遗传变异发现其潜在的功效和副作用显示文摘通过研究药物靶蛋白基因的自然变异可以了解药物的功效。本研究旨在利用这种方法探索抗高血压药的潜在副作用和再利用潜力。研究者首先确定了血管紧张素转换酶抑制剂(angiotensin converting enzyme inhibitor,ACEI)、β受体阻滞剂和钙拮抗剂的合适代表基因。刘青(译) 叶鹏(校) Gill D Georgakis MK Koskeridis F Jiang L Feng Q Wei WQ Theodoratou E Elliott P Denny JC Malik R Evangelou E Dehghan A Dichgans M Tzoulaki I 2019中华高血压杂志2019,0,9:3
2全颗粒饲料对奶牛生产性能的影响显示文摘饲料中的中性洗涤纤维(NDF)含量和饲料颗粒直径是影响瘤胃功能的重要因素。试验评估了以颗粒饲料为主的奶牛瘤胃健康情况、NDF消化率和生产性能。选取8头荷斯坦母牛(336±30 d,体重346±35 kg),随机分配到交叉重复试验组中,奶牛安置于牛栏,自由采食。试验期为3周,前两周是适应期,最后一周为数据收集期。各组饲粮原料相同,但物理形式不同,分为全混合日粮(TMR)和颗粒料(直径=8 mm)。两组间物理有效NDF(pe NDF)不同,TMR组为39.8%,颗粒料组为11.8%。在试验过程中,干物质采食量(DMI)、饮水量、瘤胃反刍时间、瘤胃温度和pH情况均记录。3周后收集粪样,确定潜在的可消化NDF总消化率(pdNDF)。每阶段结束后计算平均日增重和饲料转化率。颗粒料组的DMI、DMI/体重和饮水量更高。而两组间平均日增重和饲料转化率无显著差异。颗粒料组的瘤胃反刍时间为241 min·d-1低于TMR组的507 min·d-1。饲料的不同物理外形对瘤胃温度、瘤胃pH无显著影响。TMR组的pdNDF总消化率为90.25%高于颗粒料组的86.82%。试验结果表明,动物易接受完整的颗粒饲料,DMI较高,且反刍时间减少,但瘤胃pH无显著变化。TMR组的pdNDF消化率显著增加。尽管两组奶牛在DMI和纤维消化方面表现不同,但总体表现相似,两组饲料的保存时间与其物理形式有关。在短期内,提供能满足NDF需求的完全颗粒饲料可改善瘤胃健康状况和动物生产性能,而较长时间的数据则需要进一步试验。Wang J Yang M Cao M Lin Y Che L Q Duraipandiyan V Al-Dhabi N A Fang Z F Xu S Y Feng B Liu G Wu D Bonfante E Palmonari A Mammi L Canestrari G Fustini M Formigoni A 2016饲料博览2016,0,12:2
3Terahertz Semiconductor Quantum Well Devices显示文摘For eventually providing terahertz science with compact and convenient devices,terahertz (1~10THz) quantum-well photodetectors and quantum-cascade lasers are investigated.The design and projected detector performance are presented together with experimental results for several test devices,all working at photon energies below and around optical phonons.Background limited infrared performance (BLIP) operations are observed for all samples (three in total),designed for different wavelengths.BLIP temperatures of 17,13,and 12K are achieved for peak detection frequencies of 9.7THz(31μm),5.4THz(56μm),and 3.2THz(93μm),respectively.A set of THz quantum-cascade lasers with identical device parameters except for doping concentration is studied.The δ-doping density for each period varies from 3.2×1010 to 4.8×1010cm-2.We observe that the lasing threshold current density increases monotonically with doping concentration.Moreover,the measurements for devices with different cavity lengths provide evidence that the free carrier absorption causes the waveguide loss also to increase monotonically.Interestingly the observed maximum lasing temperature is best at a doping density of 3.6×1010cm-2.Liu H C Luo H Ban D Waichter M Song C Y Wasilewski Z R Buchanan M Aers G C SpringThorpe A J Cao J C Feng S L Williams B S Hu Q 2006Journal of Semiconductors2006,27,4:2
4Soil carbon in desertified land in relation to site characteristics显示文摘Feng Q Endo K N Cheng G D 2002Geoderma2002,106,:2
5Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores 显示文摘Zhao D Y Feng J L Huo Q S 1998Science1998,279,:1
6Northward migration of Helicoverpa armigera and Other motha in early summer observedwith radar in Northern China显示文摘Feng H Q Wu K M Cheng D F 2004Journal of Economic Entomology2004,97,6:1
7Radar observations of the autumn migration of the beet armyworm Spodoptera exigua (Lepidoptera: Noctuidae) and other moths in northern China显示文摘Feng H Q Wu K M Cheng D F 2003Bull Entomol Res2003,93,2:1
8Nonionic triblock and star diblock copolymer and oligomeric surfactant syntheses of highly ordered, hydrothermally stable, mesoporous silica structures显示文摘Zhao D Huo Q Feng J 1998Journal of the American Chemical Society1998,120,:1
9Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores显示文摘ZHAO D FENG J HUO Q MELOSH N FREDRICKSON G H CHMELKA B F STUCKY G D 1998Science1998,279,5350:1
10Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores显示文摘Zhao D Y Feng J L Huo Q S 1998Science1998,279,:1
11Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores 显示文摘Zhao D Feng Y J Huo Q 1998Science1998,279,5350:1
12Cu planarization in electrochemical mechanical planarization 显示文摘FENG Q L TIAN B D ALAIN D 2006Journal of the Electrochemical Society2006,153,6:1
13Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstorm pores 显示文摘Zhao D Y Feng J L Huo Q S 1998Science1998,279,5350:1
14Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores显示文摘Zhao D Y Feng J L Huo Q S 1998Science1998,279,23:1
15The TIL commissioning and performance显示文摘X Zhang W Zheng X Wei F Jing Z Sui K Zheng Q Xu X Yuan X Jiang L Yang P Ma M Li J Wang D Hu S He F Li Z Peng B Feng H Zhou L Guo X Li X Zhang J Su Q Zhu H Yu R Zhao C Ma H He D Fan W Zhang 2008Journal of Physics: Conference Series2008,,3:1
16Effects of additives andtemplates on calcium carbonate mineralization in vitro显示文摘Ren D N Feng Q L Bourrat X 2011Micron2011,42,3:1
17Novel Fluorescent Dyes with Fused Perylene Tetracarboxlic Diimide and BODIPY Analogue Structures显示文摘Feng J Q Liang B L Wang D L 2008Org Lett2008,10,:1
18Nonionic triblock and star diblock copolymer and oligomeric surfactant syntheses of highly ordered, hydrothermally stable, mesoporous silica structures 显示文摘ZHAO D HUO Q FENG J CI-IMELKA B STUCKY G 1998J Am Chem Soc1998,120,:1
19Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores 显示文摘ZHAO D FENG J HUO Q 1998Science1998,279,5350:1
20查看详情显示文摘Wang J M Feng H Q Sun J F Shi D H 0,,:1
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