R
Raphael Ortiz
Researcher at Nanyang Technological University
Publications - 17
Citations - 2448
Raphael Ortiz is an academic researcher from Nanyang Technological University. The author has contributed to research in topics: Nanoparticle & Resazurin. The author has an hindex of 7, co-authored 12 publications receiving 2200 citations. Previous affiliations of Raphael Ortiz include Friedrich Miescher Institute for Biomedical Research & École Polytechnique Fédérale de Lausanne.
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Proceedings ArticleDOI
FREAK: Fast Retina Keypoint
TL;DR: This work proposes a novel keypoint descriptor inspired by the human visual system and more precisely the retina, coined Fast Retina Keypoint (FREAK), which is in general faster to compute with lower memory load and also more robust than SIFT, SURF or BRISK.
Journal ArticleDOI
Toxicants inhibiting anaerobic digestion: a review.
TL;DR: This review presents a detailed and critical summary of research on the inhibition of anaerobic processes by specific organic toxicants, inorganic toxicants and in particular, nanomaterials, focusing on the mechanism of their inhibition/toxicity.
Journal ArticleDOI
Poly(methyl methacrylate) Surface Modification for Surfactant-Free Real-Time Toxicity Assay on Droplet Microfluidic Platform.
TL;DR: It is shown that a silica nanoparticle layer coated onto a Poly(methyl methacrylate) (PMMA) and other thermoplastics surface enhances its wetting properties by creating nanoroughness, and allows simple grafting of hydrocarbon chains through silane chemistry.
Journal ArticleDOI
Tunable Chemical Release from Polyester Thin Film by Photocatalytic Zinc Oxide and Doped LiYF4 Upconverting Nanoparticles
Ting Cheng,Raphael Ortiz,Kumar Vedantham,Rafik Naccache,Fiorenzo Vetrone,Robert S. Marks,Robert S. Marks,Terry W. J. Steele +7 more
TL;DR: Iradiated polyester films with the aforementioned photoadditives had enhanced release kinetics up to 30 times more than nonirradiated, neat films with extended release times of 28 days, and near-infrared, ZnO-mediated photocatalysis had the highest light on/light off ratio release Kinetics.
Journal ArticleDOI
Rapid fluorescence-based measurement of toxicity in anaerobic digestion
Jian Lin Chen,Raphael Ortiz,Yeyuan Xiao,Terry W. J. Steele,David C. Stuckey,David C. Stuckey +5 more
TL;DR: Results suggest that a resazurin-based fluorescence measurement can potentially be incorporated into a microfluidic system to develop a biosensor for the real-time monitoring, control and early warning of toxicant/inhibitor loads in the influent to an anaerobic digestion system.