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427篇 您的检索式:作者名="Hunger"
    题名 作者 年代 出处 被引量
1锂离子在混凝土碱集料反应过程中的作用显示文摘在采用X射线衍射分析、化学组成分析和偏光显微镜分析对硅质碳酸盐集料的矿物学特征充分研究的基础上,研究了锂离子迁移渗透在混凝土碱集料反应过程中的行为特征.混凝土棱柱法(CSA A23.2-14A或ASTM C1293)所测的膨胀结果表明:掺加[Li]/[Na+K]摩尔比1.11的LiNO3能有效抑制混凝土碱集料反应膨胀;锂玻璃不仅不能抑制碱集料反应膨胀甚至会在一定程度上促进膨胀;与单一掺加混合材(粉煤灰或矿渣)相比,LiNO3与混合材的复合在一定程度上增强了相应的膨胀抑制效果;在混凝土碱集料反应过程中,存在Li+与Na+,K+之间的竞争.相对而言,Li+具有一定的优势.这与锂盐能表现出一定的混凝土碱集料反应膨胀抑制效果相一致.此外,强度对比研究结果表明,掺加锂盐一定程度上降低了混凝土的强度.俞琛捷 莫祥银 邓敏 唐明述 沈健 Benoit Fournier Klaus-Jurgen Hunger 2009东南大学学报(自然科学版)2009,39,1:11
2骨折相关性感染定义的共识显示文摘骨折相关性感染(fracture related infection,FRI)是创伤骨科一种常见的严重并发症.迄今为止,尚无明确定义,因此很难对该并发症带来的影响进行准确评估和对现有的研究展开比较.为解决这一难题,在AO基金会的支持下,我们成立了一个由科学家和医学专家组成的专家组,旨在对FRI定义达成的共识.Metsemakers WJ Morgenstern M McNally MA Moriarty TF McFadyen I Scarborough M Athanasou NA Ochsner PE Kuehl R Raschke M Borens O 谢肇 Velkes S Hungerer S Kates SL Zalavras C Giannoudis PV Richard RG Verhofstad MH 喻胜鹏 孙东 汪小华 2018中华骨科杂志2018,38,9:8
3功率循环测试中衬底焊接层的可靠性显示文摘基板与陶瓷衬底之间的焊层寿命通常利用IGBT模块的被动加热和冷却(热循环)来测试,但这种试验会引起焊层失效(分层)。实际应用中,IGBT和二极管芯片是主动被加热的,诸如焊线脱落等其它模式的失效也会限制使用寿命,通常可通过功率循环试验来评估这种应力的影响。本文通过功率循环试验来评估衬底焊层的失效,利用高循环周次的测试进行有效的衬底焊层热循环试验,其关键在于功率循环过程中焊层温度的预测。在温度波动不大的条件下,比较了被动热循环和主动功率循环时对焊接寿命的影响。Thomas Hunger Reinhold Bayerer 2010大功率变流技术2010,,4:6
4Growth performance, nutrient digestibility, antioxidant capacity,blood biochemical biomarkers and cytokines expression in broiler chickens fed different phytogenic levels显示文摘The effects of inclusion levels of a phytogenic feed additive(PFA), characterized by menthol anethol and eugenol, on broiler growth performance, nutrient digestibility, biochemical biomarkers and total antioxidant capacity(TAC) of plasma and meat, as well as on the relative expression of selected cytokines,were studied in a 42-d experiment. A total of 225 one-day-old male Cobb broiler chickens were assigned into 3 treatments, with 5 replicates of 15 chickens each. Chickens were fed maize-soybean meal basal diets following a 3 phase(i.e., starter, grower and finisher) feeding program. Depending on PFA inclusion level, treatments were: no PFA(PFA-0), PFA at 100 mg/kg(PFA-100) and PFA at 150 mg/kg(PFA-150).Feed and water were available ad libitum. Feed conversion ratio(FCR) during finisher phase was improved quadratically(P < 0.05) with increasing PFA level. Overall, increasing PFA level increased body weight gain(BWG) in a linear(P < 0.05) and quadratic(P < 0.05) manner with treatments PFA-100 and PFA-150 being greater(P < 0.05) compared with PFA-0. Total tract apparent digestibility of dry matter increased linearly(P < 0.05) and quadratically(P < 0.05) with increasing PFA level. The apparent metabolizable energy corrected for nitrogen(AMEn) also increased linearly(P < 0.05). Increasing PFA level resulted in a linear(P < 0.05) increase in blood plasma TAC. Expression of pro-inflammatory cytokine interleukin-18(IL-18) was reduced linearly(P < 0.05) in spleen with increasing PFA level. In conclusion, PFA inclusion at 100 mg/kg diet positively influenced performance, whereas PFA inclusion at150 mg/kg resulted in a stronger improvement in AMEn and plasma TAC. Finally, PFA inclusion resulted in a pattern of reduced pro-inflammatory biomarker IL-18 at spleen. Overall, this study provides evidence for the beneficial role of PFA as a natural growth and health promoter in broiler chickens that needs to be further confirmed in field studies.Vasileios Paraskeuas Konstantinos Fegeros Irida Palamidi Christine Hunger Konstantinos C.Mountzouris 2017Animal Nutrition2017,,2:5
5双功能TiSn-Beta分子筛限域的串联Lewis酸催化烯烃生成1,2-二醇显示文摘1,2-二醇主要由环氧化合物水合产生、广泛用于防冻剂,聚酯树脂和医药等化学品中间体的生产.研究表明,具有Lewis酸性的含锡沸石分子筛在环氧化物的水合反应中表现出优异的催化性能.环氧化合物是众所周知的碳亲电体之一,主要由烯烃环氧化生成.含Ti(Ⅳ)沸石,如Ti-Beta和TS-1,是烯烃环氧化反应的高效催化剂.串联催化可以将多步反应整合为一次反应,无需分离中间体,有效缩短合成路线,提高生产效率.因此,双功能Ti和Sn分子筛有望应用于烯烃制二醇的串联催化反应中,即烯烃在Ti活性位点上发生环氧化反应,随后在Sn位点上发生水合反应,进而串联一步生成1,2-二醇.在沸石分子筛中产生孤立的多功能活性位点是将多步反应整合成串联催化反应的一种有吸引力的设计策略.本文通过简单且可规模制备的后合成路线构建了双功能TiSn-Beta分子筛,并用于烯烃串联催化制1,2-二醇反应.一方面,该反应中的过氧化氢溶液既能提供氧化剂(如H2O2)用于烯烃环氧化反应,又能提供环氧化合物水合反应的亲核试剂(如H2O);同时TiSn-Beta作为一种高效双功能催化剂,孤立的Ti和Sn活性中心可以有效地将烯烃环氧化反应和环氧化物水合反应串联在沸石微反应器中,实现烯烃一步转化为1,2-二醇.另一方面,沸石的限域效应较好地保证了烯烃环氧化和环氧化物水合的高串联速率和目标产物的高选择性,在最优的反应条件下,1,2-二醇选择性高达90%以上,收率接近70%.本文结果表明沸石分子筛是构筑多功能孤立活性位点的理想载体,为其他串联反应催化剂的设计提供了良好的借鉴.雷琦锋 王畅 戴卫理 武光军 关乃佳 Michael Hunger 李兰冬 2021Chinese Journal of Catalysis2021,42,7:4
6Ce-Beta分子筛的制备及其催化性能(英文)显示文摘采用简单、易重现的两步后合成法成功制备了Ce-Beta分子筛.制备过程中,H-Beta分子筛首先经过脱铝处理得到Si-Beta分子筛,然后再以异丙醇铈为前驱体,通过干法浸渍的途径向Si-Beta分子筛引入Ce(IV).利用XRD,FT-IR,UV-Vis和1H MAS NMR等对其结构进行了表征,结果表明,Ce(IV)物种以四配位的形式成功引入Beta分子筛的骨架,Ce原子进入分子筛骨架的机理通过DRIFT光谱得以证实.通过环氧化合物水合制备1,2-二醇反应对所制的Ce-Beta催化剂进行了催化性能评价.唐波 戴卫理 孙晓明 武光军 李兰冬 关乃佳 Michael Hunger 2015催化学报2015,36,6:3
7Anatomical plate configuration affects mechanical performance in distal humerus fractures显示文摘Rainer Penzkofer Sven Hungerer Felix Wipf Geert von Oldenburg Peter Augat 2010Clinical Biomechanics2010,,10:2
8High population and dispersion of pentacoordinated Al~Ⅴ species on the surface of ?ame-made amorphous silica-alumina显示文摘Pentacoordinated Al(Al~Ⅴ)species in silica-alumina are promising to promote the formation of acid sites or act as surface defects for tailoring single-atom catalysts.However,pentahedral coordination(Al~Ⅴ)is rarely observed in conventionally prepared silica-alumina.Here,we show that high population and dispersion of Al~Ⅴ species on the surface of amorphous silica-alumina(ASA)can be achieved by means of flame spray pyrolysis.High resolution TEM/EDX,high magnetic-field NMR and DFT calculations are employed to characterize the structure of as-prepared ASAs.Solid-state ^(27)Al multi-quantum MAS NMR experiments show that most of the Al~Ⅴspecies are formed independently from the alumina phase and are accessible for guest molecules on the surface.Upon water adsorption,these Al~Ⅴ species are transformed to Al~Ⅵ species,structurally similar to surface Al~Ⅳ species,as confirmed by DFT calculations.The outstanding catalytic activity of as-synthesized ASA is demonstrated using the in situ H/D exchange reaction with deuterated benzene as an example.The Al~Ⅴ-rich ASA provides a much lower activation energy(~30 kJ/mol)than that reported for zeolite H-ZSM-5(~60 kJ/mol).The superior catalytic performance is attributed to the high Al~Ⅴcontent promoting the surface active sites in ASA.The knowledge gained on the synthesis of Al~Ⅴ-rich ASAs and the nature of aluminum coordination in these materials could pave the way to more efficient silica-alumina based catalysts.Zichun Wang Yijiao Jiang Xianfeng Yi Cuifeng Zhou Aditya Rawal James Hook Zongwen Liu Feng Deng Anmin Zheng Michael Hunger Alfons Baiker Jun Huang 2019Science Bulletin2019,64,8:2
9Identification of powdery mildew resistance loci in wheat by integrating genome-wide association study(GWAS) and linkage mapping显示文摘Wheat powdery mildew(Blumeria graminis f.sp.tritici, Bgt) is a disease of increasing importance globally due to the adoption of high yielding varieties and modern sustainable farming technologies.Growing resistant cultivars is a preferred approach to managing this disease, and novel powdery mildew resistance genes are urgently needed for new cultivar development.A genome-wide association study was performed on a panel of 1292 wheat landraces and historical cultivars using 5011 single nucleotide polymorphism(SNP)markers.The association panel was evaluated for reactions to three Bgt inoculants, OKS(14)-B-3-1, OKS(14)-C-2-1, and Bgt15.Linkage disequilibrum(LD) analysis indicated that genome-wide LD decayed to 0.1 at 23 Mb, and population structure analysis revealed seven subgroups in the panel.Association analysis using a mixed linear model(MLM) identified three loci for powdery mildew resistance on chromosome 2 B, designated QPm.stars-2BL1,QPm.stars-2BL2, and QPm.stars-2BL3.To evaluate the efficacy of GWAS in gene discovery,QPm.stars-2BL2 was validated using F2 and F2:3 populations derived from PI420646 × OK1059060-126135-3.Linkage analysis delimited the powdery mildew resistance gene in PI 420646 to an interval where QPm.stars-2BL2 was located, lending credence to the GWAS results.QPm.stars-2BL1 and QPm.stars-2BL3, which were associated with four SNPs located at 457.7–461.7 Mb and two SNPs located at 696.6–715.9 Mb in the Chinese Spring reference IWGSC RefSeq v1.0, respectively, are likely novel loci for powdery mildew resistance and can be used in wheat breeding to improve powdery mildew resistance.Genqiao Li Xiangyang Xu Chengcheng Tan Brett F.Carver Guihua Bai Xuewen Wang J.Michael Bonman Yanqi Wu Robert Hunger Christina Cowger 2019The Crop Journal2019,7,3:2
10Mechanistic investigations of the methanol-to-olefin (MTO) process on acidic zeolite catalysts by in situ solid-state NMR spectroscopy 显示文摘Wang Wei Jiao Yi Michael Hunger 2006Catalysis Today2006,113,12:1
11Properties of sputtered ZnO films and its interfaces with CdS 显示文摘SAUBERLICH F FRITSCHE J HUNGER R 2003Thin Solid Films2003,,:1
12Debris Flow Defenses in British Columbia显示文摘 Morgan C Vandine F D 1987Geological Society of America Reviews in Engineering Geology1987,7,2:1
13Fakk MZ,Camitta BM,et al E2A-PBX1 chimeric trqanscript status at end of consolidation in not predictive of treatment outcome in childhood acute lymphoblastic leukemia with t(1:9)(q23:p13),a pediatric oncology group study显示文摘Hunger SP 1998Blood1998,91,:1
14Dry-gel synthesis of zeolites EU-1 and EU-1 显示文摘ARNOLD A HUNGER M WEITKAMP J 2004Micropor Mesopor Mater2004,67,:1
15Metformin inhibits aromatase expression in human breast adipose stromal cells via stimulation of AMP-activated protein kinase显示文摘Brown KA Hunger N Docanto M 0,,:1
16Characterization of solicl catalysts in the functioning state by nuclear magnetic resonance spectroscopy 显示文摘Hunger M Wang W 2006Adv Catal2006,50,:1
17Debris Flow Defenses in British Columbia显示文摘Hunger O Morgan C Vandine F D 1987Geological Society of Amer- ica Reviews in Engineering Geology1987,7,20:1
18查看详情显示文摘Seiler M Wang W Hunger M 0,,:1
19Solvothermal synthesis and characterization of large-crystal all-silica, aluminum-, and bo- ron-containing ferrierite zeolites 显示文摘Marthala V R R Hunger M Kettner F 2011Chemistry of Materials2011,23,47:1
20An ice-templated, linearly aligned chitosan-alginate scaffold for neural tissue engineering显示文摘Francis N L Hunger P M Donius A 2013J Biomed Mater Res A2013,101,12:1
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