Elisabeth Van Hecke's research while affiliated with Université de Technologie de Compiègne and other places
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Publications (23)
Sugar-based surfactants are a class of environmentally-friendly surface-active molecules well known for their functional performances, good biodegradability and reduced ecological footprint. Many previous studies have explored the surface properties of these surfactants. However, very little research has investigated their foaming properties. The p...
Foaming properties of five model surfactants, namely, sodium laureth sulfate (SLES), sodium dodecylsulfate (SDS), polyoxyethylene 23 lauryl ether (Brij L23), polysorbate 20 (Tween 20), and polysorbate 80 (Tween 80), have been compared as a function of experimental conditions using the gas‐sparging method. The influence of surfactant concentration r...
Four linear bio-based fatty ethers (di-n-dodecyl, di-n-tetradecyl, di-n-hexadecyl and di-n-octadecyl ethers) have been synthetized from free fatty alcohols according to a green and simple efficient method. Their melting properties, Tm, were studied by using DSC technique. Ethers showed higher Tm (28 – 62°C) than their corresponding alcohols, but th...
Thirteen current commercial emollients from different chemical families (hydrocarbon, ester, ether, and silicone) were firstly characterized by eight physicochemical properties which were a-priori thought to be strongly related to sensory perception. Those include usual properties as well as more original ones such as volatility, estimated by the e...
The aim of the present study is to evaluate the effect of CO 2 pressure, temperature, and CO 2 flow rate on supercritical fluid extraction of linseed oil using neat CO 2 . Chosen methodology is based on central composite rotatable design, responses studied are extract yield, oil yield, water‐extract ratio, oil γ‐tocopherol content, oil polyphenols...
In this paper, we introduce an uncertain data mining driven model for knowledge discovery in chemical database. We aim at discovering relationship between molecule characteristics and properties using uncertain data mining tools. In fact, we intend to predict the Critical Micelle Concentration (CMC) property based on a molecule characteristics. To...
The aim of this study was to investigate the interaction between water and oleaginous seeds (rapeseed, flaxseed and sunflower) and its consequence on processing (pressing). Sorption isotherms of whole seeds, hulls and embryos were established and highlight the uniform behaviour of seed fractions towards water. Seed expression is highly influenced b...
Grape seed oil being industrially obtained by solvent extraction, in this study we investigate oil extraction from grape seeds by cold screw pressing, as an alternative extraction process.Effect of raw material and process parameters were evaluated using a 12 experiments Taguchi experimental design. Variables were (1) type of grape seeds, (2) prehe...
L’objectif de cette étude est de comparer trois procédés d’extraction et d’évaluer leur efficacité pour produire une huile riche en polyphénols. Les trois procédés étudiés sont le pressage à vis, l’extraction par percolation au CO2 supercritique et la combinaison du pressage et de cette extraction : le pressage mécanique assisté par fluide supercri...
A numerical simulation using COMSOL®, a commercial software, has been developed to model heat and mass transfer during vacuum freezing by evaporation of a single puree droplet. The simulations predict local water content, temperature and mass losses during the process. This theoretical model, based on the numerical resolution of heat and mass diffu...
This work compares the efficiency of extraction and stability of extracts from mushroom (Agaricus bisporus) for different methods of extraction: pressure extraction (PE), pressure extraction assisted by pulsed electric field (PE + PEF), hot water extraction (WE; temperature, T = 343Â K, time, t = 2Â h), ethanol extraction (EE; T = 298Â K, t = 24Â h...
Rheological properties of carrot puree were investigated in the 1–1000 s−1 shear rate range with the objective of modelling the influence of time, temperature and addition of potato flakes on the flow behaviour. Carrot puree exhibited a shear‐thinning behaviour that was well described by the Ostwald‐de Waele (Power Law) model with a flow behaviour...
Current regulations require the substitution of toxic solvents by safer ones. Succinic acid diesters, which are among promising bio-based candidates, have been compared to petrochemical solvents through two complementary approaches. The first one deals with a prediction of solvents dissolution power based on Hansen Solubility Parameters (HSP). HSP...
Efficiency of pulsed electric field (PEF) induced permeabilization at 293 K in selected fruit and vegetable plant tissues (apple, potato, carrot, courgette, orange, and banana) at electric field strength (E) of 400 V·cm(-1), 1000 V·cm(-1) and pulse duration (t(p)) of 1000 μs was studied experimentally. The mean cell radius (〈r〉) was within 30 to 60...
Pulsed Electric Fields (PEF) can provoke selective permeabilization of the cell membranes without causing any serious damage to the cell walls, which is favorable to the preservation for texture preservation in the case of vegetable tissues. The electroporation of multicellular tissues results in better connections between intra-and extracellular c...
This work discusses the effects of pulsed electric field (PEF) and osmotic pre-treatments on potato tissue structure and on the freezing and freeze-drying behaviour of this tissue. Potato samples (26-mm diameter, 10-mm height) were treated by PEF (400 V/cm) to high level of disintegration (conductivity disintegration index Z was ≈0.95) and were sub...
FPS2010 - European Conference on Fluid-Particle Separation, Lyon, France, 5-7 October 2010, 157-158.
Citations
... Sodium dodecyl sulfate (SDS, purity of 99%, MW: 288.38 g·mol −1 ) was supplied by Sigma-Aldrich (Saint·-Quentin Fallavier, France). The SDS critical micellar concentration (CMC) of 8 mM was previously determined by the Wilhelmy plate method [29]. All others chemicals were of analytical grade. ...
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... They are, therefore, key raw materials used in the formulations of care products such as body oils, balms, milks, creams, and ointments [4]. They are also present in the formula of rinse-off cosmetics, e.g., bath liquids, shower gels, shampoos, and bath oils, and in color cosmetics, e.g., lipsticks, lip glosses, and proper differentiation of corneocytes are unsaturated fatty acids, cholesterol, squalenes, phospholipids, and sterols [8,9,14]. ...
... Additionally, the correlation between extraction conditions and oil properties, such as fatty acid composition and tocopherol content, can provide insight into the characterization of the extraction process and production of high-quality oils for specific applications. This correlation has been scarcely studied for Andean lupin beans, though such oil properties were reported elsewhere to be affected by scCO 2 extraction conditions (Aladi c et al., 2015;Birtigh et al., 1995;Corzzini et al., 2017;Gustinelli et al., 2018;Leo et al., 2005;Merkle & Larick, 1995;Oliveira et al., 2002;Rombaut et al., 2017). ...
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... In [35], Philippe Smets shows real world use cases where the use of belief functions provides a suitable tool to handle imperfection in data. In [36], authors use a chemical evidential database that includes amphiphile molecules described 90 through 24 attributes between structural characteristics and related physico- chemical properties. In [37] and [3], authors introduce a new method for the elicitation of experts' opinions as evidence theory distributions. ...
Reference: On Indexing Evidential Data
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... In many studies, onions have been used as a model material to investigate effects of PEF on the cell membrane permeabilization (Fincan and Dejmek 2002;Ben Ammar et al. 2011b). For PEF treatments above a threshold level of E = 350 V/cm, damage of onion cells was observed (Fincan and Dejmek 2002). ...
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... Many press designs are used in the industry for safflower oil extraction. For oil extraction, it is common to use screw or hydraulic presses in the case of oilseeds such as rapeseed [22], flax [23], sesame [24] sunflower [25][26][27], walnuts, pistachio nuts [28,29], and safflower seeds. Generally, screw presses offer some advantages over hydraulic ones, including higher oil yields and the capability for continuous or semi-continuous operation [30,31]. ...
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... These researchers also recommended the application range of the GAB model up to 90 to 95% RH. The parameter values of the developed models fell within the range described in the literature and were consistent with previous studies on different oilseeds [27][28][29][30][31][32]. Other regressed equations, such as the Modified Oswin equation, exhibited lower than 0.8 R 2 values, indicating limited applicability in predicting EMC for oilseed samples. ...
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... Thixotropic Properties 2.6.1. Constant Shear Rate Shear stress or η50 values were used to determine the time-dependent behavior of gum solutions at 25 • C. The experimental data could be fitted to the Weltman model (Equation (2)) and second-order structural kinetic model (Equation (3)), with n = 2 [26,27]. ...
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... The rice bran, grapeseed, and macadamia nut oils exhibited the lowest concentrations of TPC using both methods, with values ranging from 1.2 to 1.3 mg GAE 100 g −1 oil. The results are consistent with those reported in [2,[36][37][38]. According to the scientific evidence, the low TPC in rice bran, grapeseed, and macadamia nut oils is conditioned by the hydrophilic nature of phenolics, which limits the solubility of bioactives in the oil [39]. ...
... The mass flux (j m ) at the fruit surface (kg m -2 s -1 ), was calculated based on the following equations 44,45 . ...
