Chun Wai Choi

Randomized, sham-controlled trial of intraoperative ticagrelor removal to reduce perioperative bleeding

Michael J. Mack, Richard Whitlock, Michael Kwok Lam Chu, Bradley Taylor et autres

OBJECTIVE: Patients on ticagrelor who are undergoing cardiac surgery before completing guideline-recommended washout are at high risk for severe bleeding. This study evaluated whether a novel drug removal device reduces bleeding in patients operated within 2 days from ticagrelor discontinuation. METHODS: Eligible …

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Protocol, rationale and design of DAbigatran for Stroke PreVention In Atrial Fibrillation in MoDerate or Severe Mitral Stenosis (DAVID-MS): a randomised, open-label study

Mi Zhou, Esther W. Chan, Jo Jo Hai, Chun‐Ka Wong et autres

INTRODUCTION: Current international guidelines recommend non-vitamin K oral anticoagulants (NOACs) for stroke prevention among patients with non-valvular atrial fibrillation (AF) at significant ischaemic stroke risk given the superior safety and comparable efficacy of NOACs over warfarin. Nonetheless, the safety and effectiveness of …

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Supportive & palliative interventions in motor neurone disease: what we know from current literature?

Hon Wai Benjamin Cheng, Kwok Ying Chan, Yuen Kwan Chung, Chun Wai Choi et autres

Although there is no cure for motor neurone disease (MND), the advent of supportive interventions including multidisciplinary care (MDC) has improved treatment interventions and enhanced quality of life (QOL) for MND patients and their carers. Our integrative review showed evidence-based MDC, respiratory …

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Robust glass‐ceramics catalysts for biomass gasification

Larry G. Felix, Chun Wai Choi, D.M. Rue, Logan E. Weast et autres

Abstract Glass‐ceramics offer high melting points (1200–1500°C), excellent attrition‐resistance, and very low coefficients of thermal expansion. We have found that these materials can be employed to create active supported catalysts, bulk catalysts, or a combination of the two. Supported catalysts are created …

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Optimization of thermally impregnated Ni–olivine catalysts for tar removal

Zhongkui Zhao, Nandita Lakshminarayanan, John N. Kuhn, Allyson Senefeld-Naber et autres

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Ni-olivine catalysts prepared by thermal impregnation: Structure, steam reforming activity, and stability

John N. Kuhn, Zhongkui Zhao, Allyson Senefeld-Naber, Larry G. Felix et autres

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Olivine catalysts for methane- and tar-steam reforming

John N. Kuhn, Zhongkui Zhao, Larry G. Felix, Rachid B. Slimane et autres

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Thermally Impregnated Ni−Olivine Catalysts for Tar Removal by Steam Reforming in Biomass Gasifiers

Zhongkui Zhao, John N. Kuhn, Larry G. Felix, Rachid B. Slimane et autres

A novel and potentially economic preparation technique, thermally impregnation (TI), was developed to incorporate catalytic active materials (i.e., Ni) onto olivine. The approach allows for the synthesis of attrition-resistant Ni−olivine catalysts. Comparative studies were performed over Ni−olivine catalysts prepared by TI and …

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Triple flame propagation and stabilization in a laminar axisymmetric jet

Xiao Qin, Chun Wai Choi, Achintya K. Mukhopadhyay, Ishwar K. Puri et autres

The propagation of a methane–air triple flame in a partially premixed jet is investigated experimentally and numerically. The flame is ignited with a Nd : YAG laser in a nonuniform jet-mixing layer downstream of the burner. The ignition and flame propagation processes …

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Response of flame speed to positively and negatively curved premixed flames

Chun Wai Choi, Ishwar K. Puri

We address flame stretch effects on two-dimensional premixed ‘regular’ (RF) and ‘inverted’ (UF) flames burning methane–air and propane–air mixtures through an experimental investigation. The regular flames have a negative curvature and are concave to the unburned mixture, while the inverted flames are …

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An analysis of sub-limit flame dynamics using opposite propagating flames in mesoscale channels

Yiguang Ju, Chun Wai Choi

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Response of flame speed to positively and negatively curved premixed flames

Chun Wai Choi, Ishwar K. Puri

Many models are now available to describe chemistry at a low CPU cost, but only a few of them can be used to describe correctly premixed, partially premixed and diffusion combustion. One of them is the FPI model that uses two coordinates: …