96,911 research outputs found
H M Customs House, Geelong [picture] /
No full textAlso available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-an11893393-22
Letter from A. H. Woodward to H. M. Evans, Franklin Railway Supply Company, New York City, New York, December 15, 1927
No full textThis item is from the Woodward Family Papers, an extensive collection, including business and personal correspondence, financial records, photographs, and other materials of this Birmingham, Alabama family which operated the Woodward Iron Company
Evans Syndrome as the Initial Presentation of Systemic Lupus Erythromatosus in a Rural Kenyan Hospital: A Case Report
No full textAbstract: Evans syndrome is a rare autoimmune disorder characterized by the occurrence of autoimmune hemolytic anemia and immune thrombocytopenic purpura with or without immune neutropenia. The syndrome may be idiopathic, but in typical clinical settings, secondary causes, predominantly autoimmune diseases, may be the underlying etiology. We present a case of lupus presenting initially as Evans syndrome.
Keywords: Evans syndrome, autoimmune hemolytic anemia, immune thrombocytopenic purpura, systemic lupus erythromatosus, Coombs test.
Title: Evans Syndrome as the Initial Presentation of Systemic Lupus Erythromatosus in a Rural Kenyan Hospital: A Case Report
Author: Vonwicks C. Onyango, Kenneth H. Makokha, Samuel M. Gachie, Boniface Mutiso, Nicholas Auma, William C. Fryda,
ORCID ID: https://orcid.org/0009-0004-6791-8809
International Journal of Novel Research in Healthcare and Nursing
ISSN 2394-7330
Vol. 10, Issue 2, May 2023 - August 2023
Page No: 166-169
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 22-July-2023
DOI: https://doi.org/10.5281/zenodo.8174103
Paper Download Link (Source)
https://www.noveltyjournals.com/upload/paper/Evans%20Syndrome%20as%20the%20Initial%20Presentation-22072023-2.pdfInternational Journal of Novel Research in Healthcare and Nursing, ISSN 2394-7330, Novelty Journals, Website: www.noveltyjournals.co
STRUCTURAL CHARACTERIZATION OF ISOMERIC TRIAZOLOCOUMARINS BY HIGH-ENERGY AND LOW-ENERGY COLLISION SPECTROMETRY OF M+., [M+H]+ AND [M-H]- SPECIES
No full textTwo monomethyl- and four dimethyl-triazolocoumarin isomers were characterized by their electron impact mass spectra and by low-energy collision experiments performed on molecular ions M+. and other fragment ions with an ion-trap mass spectrometer. High-energy collision-activated dissociation measurements were performed on the protonated [M + H]+ and deprotonated [M - H]- molecular ion obtained by fast atom bombardment and M+. species produced by electron impact ionization on a double-focusing, reverse-geometry instrument. The data obtained allowed unequivocal structural identification of all the compounds investigated
Dataset for The Evolution of White Etching Cracks (WECs) in Rolling Contact Fatigue-Tested 100Cr6 steel
No full textRichardson, A. D., Evans, M. H., Wang, L., Wood, R. J. K., Ingram, M., & Meuth, B. (2018). The evolution of white etching cracks (WECs) in rolling contact fatigue-tested 100Cr6 steel. Tribology Letters, 66(1), [6].
This project is supported by a UK EPSRC Ph.D. studentship.</span
Trisetica Traub and Evans 1950
No full textTrisetica Traub and Evans, 1950b Trisetica Traub and Evans, 1950b; Stekolnikov 2018b Tecomatlana (Trisetica) Audy, 1954; Vercammen-Grandjean 1965dPublished as part of Nielsen, David H., Robbins, Richard G. & Rueda, Leopoldo M., 2021, Annotated world checklist of the Trombiculidae and Leeuwenhoekiidae (1758 - 2021) (Acari: Trombiculoidea), with notes on nomenclature, taxonomy, and distribution, pp. 1-243 in Zootaxa 4967 (1) on page 93, DOI: 10.11646/zootaxa.4967.1.1, http://zenodo.org/record/474551
The Middle Jurassic vertebrate assemblage of Skye, Scotland
No full textSusan E. Evans, Paul M. Barrett, Jason Hilton, Richard J. Butler, Marc E. H. Jones, Ming-Mei Liang, Jolyon C. Parish, Emily J. Rayfield, Denise Sigogneau-Russell and Charlie J. Underwoo
Mackiena (Mackiena) empodiformia Traub and Evans 1950
No full textMackiena (Mackiena) empodiformia Traub and Evans, 1950 a: ORI Mackiena empodiformia Traub and Evans, 1950 a; Womersley 1952; Stekolnikov 2021 Mackiena (Mackiena) empodiformia, Vercammen-Grandjean 1965dPublished as part of Nielsen, David H., Robbins, Richard G. & Rueda, Leopoldo M., 2021, Annotated world checklist of the Trombiculidae and Leeuwenhoekiidae (1758 - 2021) (Acari: Trombiculoidea), with notes on nomenclature, taxonomy, and distribution, pp. 1-243 in Zootaxa 4967 (1) on page 73, DOI: 10.11646/zootaxa.4967.1.1, http://zenodo.org/record/474551
White structure flaking failure in bearings under rolling contact fatigue
No full textWhite structure flaking (WSF) as a premature wear failure mode in steel rolling element bearings is caused by white etching cracks (WECs) and perhaps butterflies formed in the ~1 mm zone beneath the contact surface under rolling contact fatigue (RCF). WECs are branching crack systems typically several millimetres in length that have a microstructural change called ‘white etching area’ (WEA) associated with the crack. Butterflies are smaller cracks initiating at material defects and impurities that form WEA wings that revolve around their initiators. Hydrogen diffusion into the bearing steel during service and transient operating conditions have been suggested as drivers of white etching features (butterflies, WEA and WECs). However the initiation and propagation mechanisms as well as the thresholds for WEC formation are not well understood. This is due to the difficulties of creating WECs repeatedly under laboratory conditions and the lack of a method established for mapping WECs in detail or 3 dimensions as typically only limited metallographic analyses are conducted over several cross-sections. A series of RCF tests have been conducted in this study to investigate the formation drivers and formation mechanisms of WECs using a two-roller RCF machine. WECs were successfully created in hydrogen charged 100Cr6 martensitic steel rollers under low-moderate concentrations of diffusible hydrogen (~1 ppm) and service realistic loading conditions (Pmax 1.5 – 2 GPa). However, only butterflies were formed under transient conditions with non-hydrogen charged rollers. One such butterfly was analysed in detail to further understanding of crack formation mechanisms and carbide dissolution as part of the WEA microstructural change. Based on the evidence obtained from the SEM, FIB tomography and STEM/TEM analysis, a void/cavity coalescence theory for initial butterfly crack formation and iron chromium carbide dissolution as part of the WEA formation mechanism is proposed. Metallography was extensively used in this project to view cross-sections of the wear zones subject to RCF. A metallographic serial sectioning technique was established to quantitatively map wear zones for the first time. Mapping WECs in their entirety and 3D modelling revealed the 3-dimensional morphology and orientation of WECs and maximised detection of possible WEC initiators. This study has for the first time quantitatively investigated the influence of diffusible hydrogen, load and rolling cycles on white etching feature formation and the thresholds of formation. The hydrogen charged tests showed that the formation of butterflies was independent of the concentration of diffusible hydrogen with the test parameters used, but dependent on contact pressure and number of rolling cycles up to a threshold. WEC formation thresholds were found at certain values of the concentration of diffusible hydrogen, contact pressure and number of rolling cycles. Extensive serial sectioning and 3D modelling of WECs also demonstrated that the orientation of WECs differed depending on the sectioning direction. It was found that the vast majority of WECs were contained in the subsurface wear zone and did not make any connection with the surface, thus dismissing surface initiation. The WECs often interacted with inclusions that were judged to be crack initiators and evidence was found that butterfly cracks could propagate to form WECs. The white etching features initiated predominately at short sulfide type inclusions, small globular manganese sulfide oxide inclusions and small globular oxide inclusions. Therefore strong evidence was observed for a subsurface initiation mechanism of WECs from non-metallic inclusions. A comparison of the WEC formations in the hydrogen charged two-roller tests was made with serial sectioning investigations of WEC formation in wind turbine gearbox bearings obtained from the field and those tested on a large-scale transient test rig (non-hydrogen charged). This was performed to understand if a difference in the WEC initiation and propagation mechanism occurs under the differing conditions. The comparison showed correlation between the WEC formation mechanisms as a high number of inclusions interacted with the WECs that were judged to be crack initiators and small/short sized inclusions predominated as the crack initiators. Therefore based on the serial sectioning analysis across various test specimens and bearings it is proposed that one mechanism of WEC formation is due to multiple linking of extended butterflies or small WECs in the subsurface to form larger WEC networks that eventually propagate to the surface resulting in WSF. The data also suggests that steel cleanliness standards analysing inclusion density (as opposed to maximum inclusion lengths) are more relevant in understanding butterfly/WEC initiation. However steel cleanliness standards used should record inclusions that are only a couple of micrometer’s in length/diameter
Energy-related tribo-corrosion research at the National Centre for Advanced Tribology at Southampton
No full textThis paper is based on a keynote lecture given at the Third International Conference on Tribo-Corrosion, sponsored by ASTM International and held at the Georgia Institute of Technology, Atlanta, GA, April 19–20, 2012. It summarises the tribo-corrosion-related research relevant to the energy sector that has taken place over the past 30 years at the National Centre for Advanced Tribology at Southampton at the University of Southampton in the United Kingdom. Research is presented that relates to multiple components in energy generation/conversion systems and involves a wide range of tribo-corrosion mechanisms. These include cavitation erosion–corrosion of turbomachinery, abrasion–corrosion of downhole drilling equipment, erosion–corrosion of nuclear slurry handling components, bearing degradation of renewable energy systems (wind turbines), erosion–corrosion in nuclear power plants (Berg, H.-P., “Corrosion Mechanisms and Their Consequences for Nuclear Power Plants with Light Water Reactors,” Reliability and Risk Analysis: Theory and Applications, Vol. 2, 2009,pp. 57–68), erosion–corrosion in non-renewable energy systems (oil and gas), and tribochemical processes in internal combustion engines. Work from other research groups is also used to show the importance of understanding tribo-corrosion in energy generation/conversion systems
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