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Classification of hemoglobin fractions in the liquid state using Raman spectroscopy combined with machine learning Vrije Universiteit Brussel

Sara Abbasi, Mehdi Feizpour, Ilse Weets, Qing Liu, Hugo Thienpont, Francesco Ferranti, Prof. Dr. Ir. Heidi Ottevaere
Identifying hemoglobinopathies is important for the clinical management of many diseases. One of the common techniques to screen hemoglobinopathies is through high-performance liquid chromatography separation followed by UV–VIS detection. Although UV–VIS can quantify the hemoglobin fractions, it is unable to identify them. Here, we use Raman microscopy to generate fingerprint spectra of hemoglobin fractions based on which the fractions can be ...

Operando odd random phase electrochemical impedance spectroscopy (ORP-EIS) for in-situ monitoring of the Zr-based conversion coating growth in the presence of (in)organic additives Vrije Universiteit Brussel

Meisam Dabiri Havigh, Mohaddese Nabizadeh, Benny Wouters, Noel Hallemans, Tom Hauffman, John Lataire, Annick Hubin, Herman Terryn
Operando odd random phase electrochemical impedance spectroscopy (ORP-EIS) is introduced as an in-situ monitoring tool to directly monitor the conversion treatment of zinc in a hybrid Zr-based solution containing aminosilane and Cu additives. SEM and EDX are applied to investigate the morphology and elemental composition of the oxide film. Results show that the operando ORP-EIS provides an opportunity to investigate the growth of the conversion ...

FEM modelling to predict spatiotemporally resolved water uptake in organic coatings: Experimental validation by odd random phase electrochemical impedance spectroscopy measurements Vrije Universiteit Brussel

Mats Meeusen, Joost van dam, Negin Madelat, Ehsan Jalilian, Benny Wouters, Tom Hauffman, Guy Van Assche, Arjan J. M. C. Mol, Annick Hubin, Herman Terryn, et al.
water
uptake in organic coatings. To this aim, we start from a physical model, where not only Fickian diffusion of
water is taken into account but also the adsorption/desorption reaction of water on the polymer matrix. Starting
from a number of important coating properties and crucial model parameters, derived from gravimetric and
Fourier transform infrared (FTIR) measurements as the model input, the local water concentration ...

Geochemical characterization of scoriaceous and unmelted micrometeorites from the Sør Rondane Mountains, East Antarctica: Links to chondritic parent bodies and the effects of alteration Vrije Universiteit Brussel

Flore Van Maldeghem, Matthias Van Ginneken, Bastien Soens, Felix Kauffman, Seppe Lampe, Lutz Hecht, Philippe Claeys, Steven Goderis

Micrometeorites originate from the interplanetary dust complex and continuously fall to the Earth's surface in large amounts. About 10 to 20% of micrometeorites are not melted upon reaching the Earth's surface, preserving the primary features and characteristics of the parent material. Consequently, unmelted micrometeorites, together with scoriaceous micrometeorites, an intermediate form between cosmic spherules and unmelted micrometeorites, ...

Impact mixing among rocky planetesimals in the early Solar System from angrite oxygen isotopes Vrije Universiteit Brussel

B. G. Rider-Stokes, Richard C. Greenwood, M. Anand, L.F. White, Ian A. Franchi, Vinciane Debaille, Steven Goderis, Lidia Pittarello, Takashi Mikouchi
Angrite meteorites are thought to represent ancient basaltic igneous rocks that formed inward of Jupiter’s orbit on the basis of their isotopic parameters such as ε50Ti, ε54Cr and Δ17O in addition to Fe/Mn ratios of pyroxene. New bulk oxygen isotope measurements of nine angrites, and of olivine ‘xenocrysts’ and groundmass fractions from three quenched angrites, however, reveal clear isotopic disequilibrium, implying an impact melt origin. ...

Surface modification of biodegradable Mg alloy by adapting µEDM capabilities with cryogenically-treated tool electrodes Vrije Universiteit Brussel

Rahul Davis, Abhishek Singh, Kishore Debnath, Anup Kumar Keshri, Paulo Soares, Luciane Sopchenski Santos, Herman Terryn, Ved Prakash

Biomaterials are engineered to develop an interaction with living cells for therapeutic and diagnostic purposes. The last decade reported a tremendously rising shift in the requirement for miniaturized biomedical implants exhibiting high precision and comprising various biomaterials such as non-biodegradable titanium (Ti) alloys and biodegradable magnesium (Mg) alloys. The excellent mechanical properties and lightweight characteristics of Mg ...

Improvement of absorbing stability of carbon nanofibers in sub-terahertz domain using the surface modification of zinc oxide Vrije Universiteit Brussel

Chen Cheng, Wu Zhao, Huiyao Zhang, Tom Hauffman, Zhiyong Zhang, Johan Stiens
Carbon nanofibers (CNFs) is a typical electrical loss material with strong permittivity that has been widely used in the field of electromagnetic shielding, attenuation, and reception. However, studies have demonstrated that the unstable anisotropic EM behavior exhibited by CNFs in the terahertz domain hinders its application in the tremendously high frequency domain. In this study, ZnO is used to perform surface modification of CNFs based on ...

Study on the roles of bisulfite in the stress corrosion cracking of 7050-T7451 aluminum alloy in the thin electrolyte layer environment Vrije Universiteit Brussel

Mingtao Wang, Liwei Wang, Wendi Yang, Yuxi Liu, Herman Terryn

Effect of bisulfite (HSO3-) on the stress corrosion cracking (SCC) behavior of 7050-T7451 aluminum alloy in the thin electrolyte layer environment in the presence of Cl- is investigated. Addition of HSO3- inhibits the corrosion initiation but promotes the corrosion propagation and hydrogen uptake. With a quantitative calculation, the HSO3- is demonstrated to significantly facilitate the synergistic effect between stress, corrosion, and ...