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2,348 results on '"van den Berg, Albert"'

5. Alternative nano-lithographic tools for shell-isolated nanoparticle enhanced Raman spectroscopy substrates

Author

Srivastava, Ketki, primary, Jacobs, Thimo S., additional, Ostendorp, Stefan, additional, Jonker, Dirk, additional, Brzesowsky, Floor A., additional, Susarrey-Arce, Arturo, additional, Gardeniers, Han, additional, Wilde, Gerhard, additional, Weckhuysen, Bert M., additional, van den Berg, Albert, additional, van der Stam, Ward, additional, and Odijk, Mathieu, additional

Published
2024
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12. Lab-on-a-Chip: Frontier Science in the Classroom

Author

Wietsma, Jan Jaap, van der Veen, Jan T., Buesink, Wilfr, van den Berg, Albert, and Odijk, Mathieu

Abstract

Lab-on-a-chip technology is brought into the classroom through development of a lesson series with hands-on practicals. Students can discover the principles of microfluidics with different practicals covering laminar flow, micromixing, and droplet generation, as well as trapping and counting beads. A quite affordable novel production technique using scissor-cut and laser-cut lamination sheets is presented, which provides good insight into how scientific lab-on-a-chip devices are produced. In this way high school students can now produce lab-on-a-chip devices using lamination sheets and their own lab-on-a-chip design. We begin with a review of previous reports on the use of lab-on-a-chip technology in classrooms, followed by an overview of the practicals and projects we have developed with student safety in mind. We conclude with an educational scenario and some initial promising results for student learning outcomes.

Published
2018
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15. Giant and explosive plasmonic bubbles by delayed nucleation

Author

Wang, Yuliang, Zaytsev, Mikhail E., Lajoinie, Guillaume, Le The, Hai, Eijkel, Jan C. T., van den Berg, Albert, Versluis, Michel, Weckhuysen, Bert M., Zhang, Xuehua, Zandvliet, Harold J. W., and Lohse, Detlef

Published
2018

16. Towards alternative control strategies against Saprolegnia diclina on Salmonid (Salmo salar) eggs

Author

Van den Berg, Albert Hendrik

Subjects
597.56, Salmon farming
Abstract

Saprolegnia infections on eggs and fish are a major problem in the Scottish salmon farming industry. Saprolegniosis, as the disease is called, is characterised by fluffy white or grey growth on the gill and skin of fish, or on eggs. Until the turn of the century, the disease was kept under control using malachite green. The discovery of carcinogenic and teratogenic properties however, caused the dye to be banned from use in commercial aquaculture. As a result, new control methods are now sought after. Landcatch Ltd, a specialised salmon breeding company co-funded a PhD Case-studentship that was created to look for alternative control measures. Measures investigated in this thesis were on a chemical, biological or genetic basis. Within the hatchery, Saprolegnia diclina was found to be the species responsible for egg infections. Three other Saprolegnia species were discovered, including Saprolegnia parasitica, a notorious pathogen of fish. Survey of incubators with infected eggs show the presence of families of salmon whose eggs might be less susceptible to Saprolegnia infection. A potential biocontrol agent (Pseudomonas fluorescence spp) was isolated from hatchery samples, and was found to secrete molecules with strong anti-Saprolegnia properties. The investigated molecule turned out not to be a common antibiotic and is subject to further identification. Within this thesis, we report for the first time on the use of appressoria by an oomycete for the infection of a member of the animal kingdom. Specialised infection structures were found to attach themselves to the egg and subsequently weakening the attachment site by secretion of proteolitic enzymes. The resulting weak spot can then be penetrated by hyphae, leading to the death of the egg. Findings and recommendations within this Thesis have been implemented by Landcatch, and have lead to significant reductions in mortality of Salmon eggs.

Published
2012

20. Automated assessment of human engineered heart tissues using deep learning and template matching for segmentation and tracking

Author

Rivera‐Arbeláez, José M., primary, Keekstra, Danjel, additional, Cofiño‐Fabres, Carla, additional, Boonen, Tom, additional, Dostanic, Milica, additional, ten Den, Simone A., additional, Vermeul, Kim, additional, Mastrangeli, Massimo, additional, van den Berg, Albert, additional, Segerink, Loes I., additional, Ribeiro, Marcelo C., additional, Strisciuglio, Nicola, additional, and Passier, Robert, additional

Published
2023
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49. Single catalyst particle diagnostics in a microreactor for performing multiphase hydrogenation reactions

Author

Nieuwelink, Anne-Eva, Vollenbroek, Jeroen, Ferreira de Abreu, Andrea, Tiggelaar, Roald, van den Berg, Albert, Odijk, Mathieu, Weckhuysen, Bert, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Biomedical and Environmental Sensorsystems, and MESA+ Institute

Subjects
Medicine(all), Materials science, Polydimethylsiloxane, Microfluidics, UT-Hybrid-D, Multiphase systems, Flow channel, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Residence time (fluid dynamics), 01 natural sciences, 0104 chemical sciences, Catalysis, Microreactor, chemistry.chemical_compound, chemistry, Chemical engineering, Reagent, Particle, Hydrogenation, Single Catalyst particles, Physical and Theoretical Chemistry, 0210 nano-technology
Abstract

Since inter- and intra-particle heterogeneities in catalyst particles are more the rule than exception, it is advantageous to perform high-throughput screening for the activity of single catalyst particles. A multiphase...Since inter- and intra-particle heterogeneities in catalyst particles are more the rule than exception, it is advantageous to perform high-throughput screening for the activity of single catalyst particles. A multiphase system (gas/liquid/solid) is developed, where droplet-based microfluidics and optical detection are combined for the analysis of single catalyst particles by safely performing a hydrogenation study on in-house synthesized hollow Pd/SiO2 catalyst microparticles, in a polydimethylsiloxane (PDMS) microreactor. A two-phase segmented flow system of particle-containing droplets is combined with a parallel gas-reactant channel separated from the flow channel by a 50 m thick gas permeable PDMS wall. In this paper, the developed microreactor system is showcased by monitoring the Pd-catalyzed hydrogenation of methylene blue (MB). A discoloration of blue to brown visualizes the hydrogenation activity happening in a high-throughput fashion on the single Pd/SiO2 spherical catalyst microparticles, which are encapsulated in 50 nL-sized droplets. By measuring the reagent concentration at various spots along the length of the channel the reaction time can be determined, which is proportional to the residence time in the channel. The developed experimental platform opens new possibilities for single catalyst particle diagnostics in a multiphase environment.

Published
2021

50. Microcontact Switching of Single Molecules

Author

Levi, Stefano A., Mela, Petra, van Veggel, Frank C. J. M., Reinhoudt, David N., van den Berg, Albert, van Hulst, Niek F., Baba, Yoshinobu, editor, Shoji, Shuichi, editor, and van den Berg, Albert, editor

Published
2002
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