Romdhane Karoui

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The potential of front-face fluorescence spectroscopy for the authentication of unifloral and polyfloral honey types (n = 57 samples) previously classified using traditional methods such as chemical, pollen, and sensory analysis was evaluated. Emission spectra were recorded between 280 and 480 nm (excit: 250 nm), 305 and 500 nm (excit: 290 nm), and 380 and(More)
2.1. Sample Presentation 6145 3. Multivariate Statistical Analysis of IR Spectral Data 6147 4. Application of IR Spectroscopy to Food Analyses 6147 4.1. Dairy Products 6147 4.2. Meat and Meat Products 6151 4.3. Fish 6154 4.4. Edible Oils 6155 4.5. Cereals and Cereal Products 6156 4.6. Sugar and Honey 6160 4.7. Fruit and Vegetables 6160 4.8. Coffee 6164 4.9.(More)
Thirty Pseudomonas spp. strains isolated from milk, water, cheese centre and cheese surface in two traditional workshops manufacturing raw milk St. Nectaire cheese were characterised by fluorescence spectroscopy and Biolog metabolic profiling. Factorial discriminant analysis (FDA) of the two data sets revealed clear linkages between groups of isolates. In(More)
Mid infrared spectroscopy (MIR) combined with multivariate data analysis was used to discriminate between ewes milk samples according to their feeding systems (controls, ewes fed scotch bean and ewes fed soybean). The MIR spectra were scanned throughout the first 11weeks of the lactation stage. When factorial discriminant analysis (FDA) with leave one-out(More)
Twelve semi-hard (Raclette) cheeses, belonging to four brand products, namely A (n=3), B (n=3), C (n=3) and D (n=3), were produced during summer period and ripened at an industrial scale. Tryptophan, riboflavin and vitamin A fluorescence spectra were scanned on the 12 cheeses at 2, 30 and 60 days of ripening. The physico-chemical analyses were performed(More)
A total of 1041 asymptomatic "normal" schoolchildren in Kuwait, aged 6-16 years, were investigated over six months from November 1978 through April 1979 for hemolytic streptococcal throat carriage and for streptococcal immune response. A high carrier rate of beta-hemolytic streptococci (47%) with an unusually high prevalence of group C (32%) was found.(More)
Quality assessment of whiting (Merlangius merlangus) fillets stored in normal air (control group) and modified atmosphere packaging (MAP1: 50% N2/50% CO2 and MAP2: 80% N2/20% CO2) for up to 15 days at 4 °C was performed. The physico-chemical [pH, drip loss, moisture content, total volatile basic nitrogen (TVB-N), thiobarbituric acid reactive substances(More)
The potential of intrinsic fluorescence spectroscopy was investigated for differentiating between processed grains (flours, pasta, and semolinas) of different wheat cereal products. A total of 59 samples (e.g., 20 complete Kamut, semicomplete Kamut, and soft wheat flours, 28 pasta, and 11 semolinas manufactured from complete Kamut, semicomplete Kamut, and(More)
In the present study, sponge cakes, produced at the pilot scale, were monitored during aging (i.e., 1, 3, 6, 9, 16, and 20 days) by three different analytical techniques. For the texture analyzer, the hardness and elasticity of crumb cakes were found to significantly increase and decrease, respectively, throughout aging. Color parameters (L*, a*, and b*)(More)
Front face fluorescence spectroscopy coupled with chemometric tools was used as a useful tool for the monitoring of sponge cakes freshness, produced at the pilot scale, during ageing (i.e. 1, 3, 6, 9, 16, and 20days). The fluorescence emission spectra were acquired in the 340-490nm and 390-680nm after excitation at 325 and 380nm, respectively, while(More)