Results 51 to 60 of about 260,960 (312)

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Does right thoracotomy increase the risk of mitral valve reoperation? [PDF]

, 2003
ObjectiveThe study objective was to determine whether a right thoracotomy approach increases the risk of mitral valve reoperation.MethodsBetween January of 1993 and January of 2004, 2469 patients with mitral valve disease underwent 2570 reoperations ...
Lars G. Svensson, A. Marc Gillinov, Eugene H. Blackstone, Penny L. Houghtaling, Kyung-Hwan Kim, Gösta B. Pettersson, Nicholas G. Smedira, Michael K. Banbury, Bruce W. Lytle, Thompson, Onnasch, Onnasch, Byrne, Holman, Pretre, Vleissis, Steimle, Svensson, Svensson, Svensson, Rosenbaum, Blackstone, Breiman, Diggle   +23 more
core   +1 more source

Interaction of Ladle Slag With Varying SiO2 Content and Recyclate‐Based MgO–C Refractories

Advanced Engineering Materials, EarlyView.
Ladle slags (CaO/Al2O3 = 1) with 1–20 wt% SiO2 were investigated in contact with industrial MgO–C refractories fabricated from fresh magnesia and 50 wt% recyclate. The sessile drop method at 1600°C reveals intensive gas formation, delayed slag infiltration in recyclate‐based samples, and, under high‐SiO2 slag, formation of a dense MgAl2O4‐rich ...
Anton Yehorov, Eldar Salpagarov, Anhelina Mospan, Till Manon Jannis Stadtmüller, Thomas Schemmel, Christos Georgios Aneziris, Olena Volkova   +6 more
wiley   +1 more source

Contemporary Outcomes in Low‐Gradient Aortic Stenosis Patients Who Underwent Dobutamine Stress Echocardiography

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019
Background Detection of flow reserve (FR) by dobutamine stress echocardiography is used for risk stratification in low‐gradient aortic stenosis (AS).
Kimi Sato, Kesavan Sankaramangalam, Krishna Kandregula, Jennifer A. Bullen, Samir R. Kapadia, Amar Krishnaswamy, Stephanie Mick, L. Leonardo Rodriguez, Richard A. Grimm, Venu Menon, Milind Y. Desai, Lars G. Svensson, Brian P. Griffin, Zoran B. Popović   +13 more
doaj   +1 more source

Massive TAVR

JACC: Case Reports, 2020
A 65-year-old woman with a large adnexal mass was found to have severe bicuspid aortic valve stenosis. Transcatheter aortic valve replacement was chosen rather than surgical aortic valve replacement because of concerns over risks.
Siddharth Chauhan, MD, Simbo Chiadika, MD, Tariq Dayah, MD, Sam Chitsaz, MD, Prakash Balan, MD, JD   +4 more
doaj   +1 more source

Liquid-fuel valve with precise throttling control [PDF]

, 1971
Prototype liquid-fuel valve performs on-off and throttling functions in vacuum without component cold-welding or excessive leakage. Valve design enables simple and rapid disassembly and parts replacement and operates with short working stroke, providing ...
Mcdougal, A. R., Porter, R. N., Riebling, R. W.   +2 more
core   +1 more source

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

Advanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana, Indra Apsite, Leonid Ionov   +2 more
wiley   +1 more source

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

Advanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz, Jonas De Breuck, Sahar Salehi, Meike N. Leiske   +3 more
wiley   +1 more source

Late Type A Dissection After Transfemoral Aortic Valve Replacement

JACC: Case Reports, 2020
An 87-year-old woman had residual moderate to severe aortic insufficiency following transcatheter aortic valve replacement. A year later, she developed extensive Stanford type A aortic dissection originating at the supra-annular aortic edge of the ...
Michael E. Pontious, BS, Awais Ashfaq, MBBS, Justin J. Watson, MD, Howard K. Song, MD, PhD, Cristina Fuss, MD, Scott M. Chadderdon, MD, Castigliano M. Bhamidipati, DO, PhD, MSc   +6 more
doaj   +1 more source

Machine Learning-Based Predictive Model of Aortic Valve Replacement Modality Selection in Severe Aortic Stenosis Patients

Medical Sciences, 2023
The current recommendation for bioprosthetic valve replacement in severe aortic stenosis (AS) is either surgical aortic valve replacement (SAVR) or transcatheter aortic valve replacement (TAVR).
Ronpichai Chokesuwattanaskul, Aisawan Petchlorlian, Piyoros Lertsanguansinchai, Paramaporn Suttirut, Narut Prasitlumkum, Suphot Srimahachota, Wacin Buddhari   +6 more
doaj   +1 more source