Publicaties

Organic acids (e.g., lactic acid, acetic acid and citric acid) are popular preservatives. In this study, the Listeria innocua inactivation is investigated under dynamic conditions of pH and undissociated lactic acid ([LaH]). A combined primary (Weibull-type) and secondary model developed for the L. innocua inactivation under static conditions [Janssen, M., Geeraerd, A.H., Cappuyns, A., Garcia-Gonzalez, L., Schockaert, G., Van Houteghem, N., ...

OBJECTIVE: To determine the accuracy of computed tomography (CT) dynamic stress myocardial perfusion imaging to estimate myocardial blood flow (MBF) in a porcine animal model with variable degrees of induced coronary artery stenosis in comparison with microsphere-derived MBF. METHODS AND MATERIALS: Seven domestic pigs (36 ± 4 kg) received stents (confirmed 3.0 mm diameter) in the left anterior descending coronary artery distal to first diagonal ...

AIMS: When subjected to dynamic temperatures surpassing the expected maximum growth temperature, Escherichia coli K12 MG1655 shows disturbed growth curves. These irregular population dynamics were explained by considering two subpopulations, i.e. a thermoresistant and a thermosensitive one (Van Derlinden et al. 2010a). In this paper, the influence of the initial cell concentration on the subpopulations' dynamics is evaluated. METHODS AND ...

Mental stress is a growing problem in our society. In order to deal with this, it is important to understand the underlying stress mechanisms. In this study, we aim to determine how the cardiorespiratory interactions are affected by mental arithmetic stress and attention. We conduct cross time-frequency (TF) analyses to assess the cardiorespiratory coupling. In addition, we introduce partial TF spectra to separate variations in the RR interval ...

Twin graphene as a new two-dimensional carbon allotrope was introduced recently based on the first principal calculations. Here, mechanical properties of two types of twin graphene sheets are investigated using molecular dynamics simulation. By applying uniaxial stress along both zigzag and armchair direction separately, we found that the Young's modulus of two type of twin graphene are independent of the direction of applied external stress ...

In view of the tendency towards ever lighter and more powerful machines and even shorter design cycles, it becomes essential to have virtual prototyping tools that allow for fast and reliable numerical simulations. Current state-of-the-art structural dynamics and flexible multibody simulation techniques usually involve the solution of matrix systems with thousands to millions of variables. Model order reduction schemes are used to keep ...

The crop water stress index (CWSI) has been shown to be a tool that could be used for non-contact and real-time monitoring of plant water status, which is a key requirement for the precision irrigation management of crops. However, its adoption for irrigation scheduling is limited because of the need to know the baseline temperatures which are required for its calculation. In this study, the canopy temperature of greenhouse cultivated lettuce ...

The possibility to generate and detect guided acoustic waves in plates, plate-like or tube, cylinder-like structures for the detection of defects such as cracks and delaminations is well recognized in the field of non-destructive testing (NDT). Timely detection of defects in an early stage prevents them to grow to a level on which they cause failure of components, which can go along with great human and economic loss. NDT is becoming more ...

Recently, a wave based method was developed to efficiently model the harmonic behavior of poroelasticmaterials. This novel method relaxes the frequency limitations of the finite element method by using exactsolutions of the governing equations to approximate the field variables. However, in the case that the stressfields exhibit a singularity, the Wave Based Method suffers from convergence problems. This paper derivescriteria to predict the ...