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| 1 | Assessing the effects of surface-bound humic acid on the phototoxicity of anatase and rutile TiO_2 nanoparticles in vitro显示文摘In this study,the cytotoxicity of two different crystal phases of TiO_2 nanoparticles,with surface modification by humic acid(HA),to Escherichia coli,was assessed.The physicochemical properties of TiO_2 nanoparticles were thoroughly characterized.Three different initial concentrations,namely 50,100,and 200 ppm,of HA were used for synthesis of HA coated TiO_2 nanoparticles(denoted as A/RHA50,A/RHA100,and A/RHA200,respectively).Results indicate that rutile(LC50(concentration that causes 50%mortality compared the control group)=6.5)was more toxic than anatase(LC_50=278.8)under simulated sunlight(SSL)irradiation,possibly due to an extremely narrow band gap.It is noted that HA coating increased the toxicity of anatase,but decreased that of rutile.Additionally,AHA50 and RHA50had the biggest differences compared to uncoated anatase and rutile with LC_50of 201.9 and21.6,respectively.We then investigated the formation of reactive oxygen species(ROS)by TiO_2 nanoparticles in terms of hydroxyl radicals(OH)and superoxide anions(O_2^-).Data suggested that O_2^- was the main ROS that accounted for the higher toxicity of rutile upon SSL irradiation.We also observed that HA coating decreased the generation of OH and O_2^- on rutile,but increased O_2^- formation on anatase.Results from TEM analysis also indicated that HA coated rutile tended to be attached to the surface of E.coli more than anatase. | Xiaojia He Sabrieon Sanders Winfred G.Aker Yunfeng Lin Jessica Douglas Huey-min Hwang | 2016 | Journal of Environmental Sciences2016，28，4： | 6 |
| 2 | Assessing the effect of different natural dissolved organic matters on the cytotoxicity of titanium dioxide nanoparticles with bacteria显示文摘Titanium dioxide nanoparticles(TiO_2 NPs) are among the most widely manufactured nanomaterials on a global scale. However, prudent and vigilant surveillance, incumbent upon the scientific community with the advent of new technologies, has revealed potentially undesirable effects of TiO_2 NPs on biological systems and the natural environment during their application and discharge. Such effects are likely best evaluated by first assessing the fate of the TiO_2 NPs in natural environments. In this study, the effects of terrestrial humic acid(HA) and tannic acid(TA), two major members of the collective:dissolved organic matter(DOM), on the cytotoxicity of TiO_2 NPs to Escherichia coli were investigated in the presence and absence of natural sunlight. Qualitative(transmission electron microscopy(TEM)) and quantitative(LC50) analyses were employed in this study. In addition, the production of reactive oxygen species(ROS) in the form of UOH was further assessed—as HA or TA increased the production of ROS decreased. The inhibition of bacterial viability in the light treatment groups, with respective treatment organics at concentrations of 10 ppm, was less in TA than in terrestrial HA. SAS was used to analyze the treatment effect of individual factors of light irradiation, DOM, and concentration of TiO_2 NPs. | Xiaojia He Donee' McAlliser Winfred G. Aker Huey-min Hwang | 2016 | Journal of Environmental Sciences2016，28，10： | 2 |
| 3 | Evans syndrome in childhood显示文摘 | Ching-Hon P Judith W Winfred W | 1980 | J Pediatr1980，97，5： | 1 |
| 4 | Finite element simulation of cone penetration 显示文摘 | WINFRED A F JOHNSON C E ROBERT C C | 2005 | Applied Mathematics and Computation2005，，162： | 1 |
| 5 | Finite element simulation of cone penetration显示文摘 | Winfred A Clarence E Robert C | 2005 | Applied Mathematics and Computation2005，162，2： | 1 |
| 6 | The 87Sr optical frequency standard at PTB显示文摘 | St Falke H Schnatz J S R Vellore Winfred Th Middelmann St Vogt S Weyers B Lipphardt G Grosche F Riehle U Sterr Ch Lisdat | 2011 | Metrologia2011，，5： | 1 |
| 7 | A structural principle of language and its implications显示文摘 | Lehmann Winfred P | 1973 | Language 491973，，： | 1 |
| 8 | 壳聚糖涂膜对甜玉米采后品质的影响[J]显示文摘 | Tettevi Winfred Holly 茅林春 | 2000 | 食品工业科技2000，21，6： | 1 |
| 9 | Synergistic combination of marine oligosaccharides and azithromycina- gainst pseudomonas aeruginosa 显示文摘 | Xiaojia H Huey-min H Winfred GA | 2014 | Microbiol Res2014，169，： | 1 |
| 10 | Efficacy and safety of renal tubule cell therapy for acute renal failure 显示文摘 | James Tumlin Ravinder Wali Winfred Williams | 2008 | J Am Soc Nephrol2008，19，： | 1 |
| 11 | Antibody to intercellular adhesion molecule 1 protects the kidney against ischemic injury显示文摘 | Kelly KJ Winfred W Williams JR | 1994 | Proc Natl Acad Sci USA1994，91，2： | 1 |
| 12 | Fatigue mechanisms in graphite SIC composites at room and high temperature显示文摘 | WINFRED L MORRIS | 1991 | J Am Ceram Soc1991，77，3： | 1 |
| 13 | Risk of recurrent stroke in patients with sickle cell disease treated with erythrocyte transfusions显示文摘 | Charles H. Pegelow Robert J. Adams Virgil McKie Miguel Abboud Brian Berman Scott T. Miller Nancy Olivieri Elliott Vichinsky Winfred Wang Donald Brambilla | 1995 | The Journal of Pediatrics1995，，6： | 1 |
| 14 | First total synthesis of ent-gelsedine via a Novel iodide-promoted allene n-acyliminium ion cyclization显示文摘 | Winfred G B Rutger M Fieseler F | 2000 | Org Chem2000，65，： | 1 |
| 15 | Captopril-induced toxic epidermal necrolysis and agranulocytosis successfully treated with granuloeyte colony-stimulating factor 显示文摘 | Winfred RI Nanda S | 1999 | South Med J1999，92，9： | 1 |
| 16 | Influence of Three Protein Sources on Performance of Grasscutters (Thryonomys swinderianus) Fed Diets with or without Fishmeal显示文摘 | Victoria Attoh-Kotoku Dagbui Kofi Emmanuel Donkoh Armstrong Atuahene Comfort Charity Akpadie Winfred | 2015 | Journal of Agricultural Science and Technology(A)2015，5，7： | 0 |
| 17 | 航天飞机的两个固体火箭发动机的推力不平衡显示文摘作者在以前的文章中曾提出了对航天飞机发射时并行点火的大型固体火箭发动机对的推力不平衡进行理论分析的Monte Carlo法。本文对这种分析法的有效性作了进一步论证,给出了航天飞机计划的试验结果,并与Monte Carlo分析法的结果进行了比较。文中分三个阶段对试验结果进行了检验:(1)从四个用于静态试验的研制发动机(DM1到4)中挑选固体火箭发动机对;(2)从三个鉴定发动机(QM1到3)中挑选出的发动机对;(3)首次飞行试验结果。讨论了飞行试验测量设备引起的推力不平衡评估中可能产生的不准确性。理论和试验值大体符合,为未来的航天飞机固体火箭发动机对进行推力不平衡分析的Monte Conlo预测法由此得到印证。 | Winfred A.Foster 李庆中 | 1990 | 国外导弹与航天运载器1990，，3： | 0 |
| 18 | Assessment of trace metals in droppings of Adélie penguins(Pygoscelis adeliae) from different locations of the Antarctic Peninsula area显示文摘In recent decades, polar regions of the planet have witnessed an increase in human presence. Antarctica is considered one of the most pristine regions of the world, but it could be affected by pollution owing to anthropogenic activities, particularly in the Antarctic Peninsula. Human presence can increase the levels of some trace metals in Antarctic environments, an issue that needs to be evaluated. To acquire data of trace metal contamination in the Antarctic Peninsula region, concentrations(dry weight) of Cd, Pb, As, Cu, Hg and Zn in fresh excrement of Adélie penguins were determined by atomic absorption spectrophotometry. During the 2012/2013 austral summer, samples were collected from four important nesting sites on the Antarctic Peninsula: Arctowski Base, Kopaitic Island(both sites in the northern Antarctic Peninsula), Yalour Island and Avian Island(both sites in the southern Antarctic Peninsula). Data showed that Adélie penguin excreta had significantly higher levels(mg·kg-1) of As, Cd, Hg, Pb and Cu at Arctowski Base and Kopaitic Island, both sites that have major anthropogenic activities that probably contributed to increased metal levels. The levels of trace metals in Adélie penguins were similar to those reported in excreta of Antarctic species in previous studies, and lower than those in excreta of other Antarctic animals. Data suggest that metals ingested by these penguin species that feed in the sea, end up in terrestrial ecosystems. | José E.Celis Winfred Espejo Ricardo Barra Daniel Gonzalez-Acu?a Francisca Gonzalez Solange Jara | 2015 | Advances in Polar Science2015，26，1： | 0 |
| 19 | A Systemic Functional Semiotic Investigation of Illustrations in Chinese Poem Books:An Ontogenetic Perspective显示文摘While images have been sufficiently investigated from the systemic functional semiotic approach in various multimodal text types,illustrations in poem books have received relatively little attention.This paper analyzed 2233 images in 15 poem picture-books(IPBs)targeted at different age groups,and classified as pre-school,school and adult groups.Statistics herein show that visual meanings in different groups manifest significantly different patterns in terms of ideational,interpersonal and compositional functions.The distributions are clearly motivated by different pedagogical functions,moving from basic cognitive development,to literacy cultivation and affiliation,and finally to enculturation of aesthetics and social values.The study therefore informs IPB practitioners how to match the visual design of illustrations with the pedagogical needs of readers of different ages. | Zenan Zhong Shukun Chen Winfred Wenhui Xuan | 2021 | Language and Semiotic Studies2021，7，4： | 0 |
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