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2,079 results on '"Boon, Nico"'

204. Screening of bacteria and concrete compatible protection materials

Author

Ersan, Yusuf Cagatay, Da Silva, Filipe Bravo, Boon, Nico, Verstraete, Willy, and De Belie, Nele

Subjects
Bacteria -- Analysis, Concrete -- Analysis -- Chemical properties, Zeolites -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT Bacteria that can induce calcium carbonate precipitation have been studied for self-healing concrete applications. Due to the harsh environment of concrete, i.e. very high pH, small pore size and [...]

Published
2015
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205. UV Photonic-Integrated-Circuits-Based Structured Illumination Microscopy With a Field of View Larger than <inline-formula><tex-math notation="LaTeX">$100\,\mu \text{m}^{2}$</tex-math></inline-formula>

Author

Lin, Chupao, Schaubroeck, David, Baets, Roel, Boon, Nico, and Le Thomas, Nicolas

Abstract

Photonic integrated circuits (PICs) are expected to add practicality and new functionalities in a considerable number of optical applications, including optical microscopy. Here, we present a PIC design allowing a far-field structured UV illumination pattern with a fringe period as low as $\text{370}\,\text{nm}$, a fringe visibility of 0.83 over field of views of more than $150\,\mu \text{m}\,\times 200\,\mu \text{m}$ and a radiant intensity as large as $\text{0.49}\,\text{mW}$. The circuits include single mode waveguides with propagation losses of $\text{3}\,\text{dB/cm}$ at a wavelength $\lambda =360\,\text{nm}$, two diffraction gratings for beam shaping out of the chip plane, a beam splitter and a phase shifter. Using fluorescent gratings with pitches longer or shorter than the wavelength, as control objects, and a collecting lens with a numerical aperture of 0.5, the current PICs enable to highlight experimentally the Moiré pattern at the heart of the optical resolution enhancement and to achieve a doubling of the optical resolution in the direction of the illumination.

Published
2023
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218. Mesophilic and thermophilic biofiltration of N,N-Dimethylformamide : long-term performance evaluation and microbial communities’ evolution

Author

Lamprea Pineda, Paula, Demeestere, Kristof, Toledo Padrón, Manuel, Boon, Nico, Van Langenhove, Herman, and Walgraeve, Christophe

Subjects
Chemistry, GHGs, Biofiltration performance, SIFT-MS, Methanogenic and methylotrophic degradation
Abstract

N,N-Dimethylformamide (DMF) is an organic solvent produced in large quantities worldwide. It is considered as a hazardous air pollutant and its emission should be controlled. However, only a very limited number of studies have been performed on the removal of gaseous DMF by biological technologies. In this paper, we evaluate the removal of DMF under mesophilic and thermophilic conditions in a lab-scale biofilter packed with wood chips and compost. The performance of the biofilter was studied under varying inlet conditions using Selected Ion Flow Tube Mass Spectrometry (SIFT-MS). Furthermore, microbial analysis data is presented to identify the microorganisms responsible for DMF removal and observe their evolution over time. The results show that, at ambient temperature, the biofilter achieved removal efficiencies (RE) above 98% at Inlet Loads (ILs) up to 297±52 g DFM m-3 h-1 (EBRTs > 10.7 s). However, a decrease in Empty Bed Residence Time (EBRT) (6.4 s) associated with an increase in IL (380±129 g DFM m-3 h-1) led to an unstable outlet stream and, thus, to a drop in the biofilter performance. Moreover, an increase in temperature - from 21 to 65 °C - led to a decrease in RE. Overall, our experimental results indicate that biofiltration is a promising technique to remove DMF from waste gas streams, but a mechanistic understanding is needed to exploit its potential and rapid implementation in full-scale installations.

Published
2021

220. Supplementary Information

Author

Heyse, Jasmine, Schattenberg, Florian, Rubbens, Peter, Müller, Susann, Waegeman, Willem, Boon, Nico, and Props, Ruben

Abstract

Supplementary Materials and Methods, Tables and Figures for Predicting the presence and abundance of bacterial taxa in environmental communities through flow cytometric fingerprinting.

Published
2021
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