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See detailQuality characteristics and oxidative stability of date seed oil during storage
Besbes, S.; Blecker, Christophe ULg; Deroanne, Claude et al

in Food Science & Technology International (2004), 10(5), 333-338

Studies were conducted on some quality characteristics of date seed oil from two date palm cultivars (Phoenix dactylifera L.): Deglet Nour and Allig. The following values were obtained for Deglet Nour and ... [more ▼]

Studies were conducted on some quality characteristics of date seed oil from two date palm cultivars (Phoenix dactylifera L.): Deglet Nour and Allig. The following values were obtained for Deglet Nour and Allig cultivars respectively: unsaponifiable matter 8.92-7.76%, iodine value 45.49-44.08, total phenols 520.81-220.32 mug/g oil, chlorophylls 0.86-0.58 mug/g oil, viscosity 18.50-20.50 mPa.s, refractive index 1.457-1.462, acidity 1.06-2.10mg KOH/g oil and peroxide index 16.00-25.00 meq O-2/100g oil. Lipid fractionation of date seed oil yielded 98.30-97.30% neutral lipids, 97.26-96.90% triglycerides, 0.25-0.18% phospholipids and 0.36-0.31% sterols. Gas-liquid chromatography revealed that the major unsaturated fatty acid was oleic acid (39.17-42.13%) while the main saturated fatty acid was lauric acid (24.34-22.56%). Date seed oil showed high medium molecular weight triglycerides (C32-C42, about 27%). Extinction coefficients at 232 nm and 270 nm increased slightly during 40 days in oven (60degreesC) showing that date seed oil could be easily stored. The production of oil from date seeds provides the use of a renewable resource, and at the same time adding value to agricultural products. [less ▲]

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See detailQuality characteristics and oxydative stability of date seed oil during storage.
Besbes, Souhail; Blecker, Christophe ULg; Deroanne, Claude et al

in Food Science & Technology International (2004), 10(5), 333-338

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See detailQuality characteristics of marketed eggs in Basse Kabylie (Algeria)
Moula, Nassim ULg; Philippe, François-Xavier ULg; Ait Kaki, Asma ULg et al

Poster (2012, October 19)

Quality variations of retailed eggs are widely reported. This study aims at assessing the quality of eggs according to the marketing channel in the department of Bejaia (Algeria). In spring and summer ... [more ▼]

Quality variations of retailed eggs are widely reported. This study aims at assessing the quality of eggs according to the marketing channel in the department of Bejaia (Algeria). In spring and summer 2012, a total of 3330 eggs were bought in 30 stores divided into 3 categories: 10 supermarkets (1146 eggs), 10 public markets (1048 eggs), and 10 shops (1136 eggs). The eggs weights differed significantly with the marketing channel with 58.9±0.14, 61.2±0.13 and 62.8±0.13 g for public markets, shops and supermarkets, respectively (p<0.001). Although the shell thickness was similar for all marketing channels, the proportion of damaged eggs was higher in public markets (9.0%), intermediate in shops (7.3%) and lower in supermarkets (5.7%; p<0.05). The yolk/albumen ratio was significantly higher for eggs from supermarkets (48.1%) compared to the other channels (around 47.4%; p<0.05). The freshness of the eggs, measured by the Haugh method, was lower in public markets (74.3 units), intermediate in shops (77.6 units) and higher in supermarkets (79.9 units; p<0.05). The price of eggs, expressed in Algerian Dinar (AD) per kg, was significantly lower in public markets (124 AD/kg) compared to the two other channels (around 131 AD/kg; p<0.05). One can conclude that egg quality in Basse Kabylie differs significantly between marketing channels with higher quality observed in supermarkets. The lower quality of eggs in public markets is associated with lower price. Eggs from shops present an intermediate quality. A one-year study would allow studying both the potential seasonal effect and compare intrinsic variability across marketing channels. [less ▲]

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See detailQuality characteristics of sesame seeds and by-products
Elleuch, Mohamed; Besbes, Souhail; Roiseux, Olivier et al

in Food Chemistry (2007), 103(2), 641-650

The chemical composition, of raw sesame seed (RS); Sesame coats 1 (SC1) and sesame coats 2 (SC2) obtained as a by-product respectively after dehulling and roasting processes during preparation of sesame ... [more ▼]

The chemical composition, of raw sesame seed (RS); Sesame coats 1 (SC1) and sesame coats 2 (SC2) obtained as a by-product respectively after dehulling and roasting processes during preparation of sesame paste (tehineh) for the manufacturing of Halaweh (sweetened tehineh), was determined along with the physicochemical characteristics of the oil fraction. Compared to RS, SC1 and SC2 showed higher amounts of dietary fibre, ash and polyphenol and lower amounts of oil and protein. Oil from SC1 and SC2, had a higher content of free fatty acids, chlorophylls, polyphenols and sesamol than RS oil. SC2 oil showed more intense colour, more absorbance in UV-A, UV-B and UV-C ranges and a significant higher viscosity (P < 0.05). No differences (P > 0.05) were observed for refractive index, iodine value and fatty acids composition. This latter was essentially dominated by oleic and linoleic acids. Oxidative stability of oil was investigated using a Rancimat system and in an oven test at 65 degrees C over 60 days. RS oil was more resistant to the thermal treatment during a long period than SC1 and SC2 oils. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

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See detailQuality control of Citri reticulatae pericarpium: Exploratory analysis and discrimination.
Tistaert, Christophe; Thierry, Line; Szandrach, Andrzej et al

in Analytica Chimica Acta (2011), 705(1-2), 111-22

Extracts of Citri reticulatae pericarpium (PCR) are commonly used in the Traditional Chinese Medicine. The quality control of PCR is currently performed by single marker analysis, which can hardly ... [more ▼]

Extracts of Citri reticulatae pericarpium (PCR) are commonly used in the Traditional Chinese Medicine. The quality control of PCR is currently performed by single marker analysis, which can hardly describe the complexity of such natural samples. In this study, a fingerprint methodology for PCR based on high-performance liquid chromatography (HPLC) was developed and validated. A total of 69 fingerprints of authenticated PCR samples, commercial PCR samples, mixed peel samples, and other Citrus peels were recorded. Exploratory data analysis allowed optimizing the extraction procedure and detecting mixed peel samples. Once the optimizations were performed and the method validated, discrimination between the authentic PCR samples and all other samples was performed by p-Discriminant Partial Least Squares. The established model was able to differentiate between classes with a high reliability for each sample. Furthermore, evaluation of the score and loading plots of the model indicated nobiletin, tangeretin, naringin and hesperidin as important markers for the quality control of PCR. [less ▲]

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See detailQuality control of particulate materials through image analysis.
Pirard, Eric ULg

in Optics and Industrial Vision (2004)

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See detailQuality controls of no-carrier-added aromatic amino acids such as FDOPA and FTYR produced at curie level
Libert, Lionel ULg; Lemaire, Christian ULg; Giacomelli, Fabrice ULg et al

Poster (2013, May)

Aromatic fluoro amino acids such as 2-[18F]fluoro-L-tyrosine (FTYR) and 6-[18F]fluoro-L-DOPA (FDOPA) are useful radiopharmaceuticals for oncologic studies and evaluation of the presynaptic dopaminergic ... [more ▼]

Aromatic fluoro amino acids such as 2-[18F]fluoro-L-tyrosine (FTYR) and 6-[18F]fluoro-L-DOPA (FDOPA) are useful radiopharmaceuticals for oncologic studies and evaluation of the presynaptic dopaminergic function using positron emission tomography. Recently, a no-carrier-added (nca) enantioselective synthesis of these compounds, based on an multistep PTC approach was automated in a FASTlabTM module from GE . From 185 GBq of [18F]fluoride and after 1 hour of synthesis, more than 37 GBq of FTYR or FDOPA are available . This automated production yields enough doses for many PET studies. A monograph for FDOPA prepared by electrophilic substitution exists , but it is not adapted to the nca nucleophilic synthesis of FDOPA and FTYR, as in this case specific activity, by products and possible impurities are different. A complete quality control (QC) has then be developed in accordance with the guidelines of the European Pharmacopeia (Eur. Ph.). [less ▲]

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See detailQuality criteria to assess the implementation of a local group of security promotion
Lechien, Xavier; Vandoorne, Chantal ULg; Bantuelle, Martine et al

in Bouwman, L. I.; Boonekamp, G. M. M.; Koelen, M. A. (Eds.) Proceedings of the International conference on Health Promotion and Nutrition (1997)

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See detailQuality evaluation - A challenge for online courses and catalogues
Poumay, Marianne ULg

in Gard, Ellen (Ed.) EMDEL : A model for valorization of eLearning in a knowledge society (2005)

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See detailQuality evaluation of Apples
Leemans, Vincent ULg; Kleynen, Olivier

in Sun, Da-Wen (Ed.) Computer Vision Technology for Food Quality Evaluation (2008)

The chapter describe how to asses apple quality by using machine vision. The concept of quality of an apple is detailed. The manipulation of the fruits, the lighting and the acquisition techniques are ... [more ▼]

The chapter describe how to asses apple quality by using machine vision. The concept of quality of an apple is detailed. The manipulation of the fruits, the lighting and the acquisition techniques are reviewed. The shape and colour assessment are summarised. The evaluation of the surface defects is [less ▲]

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See detailQuality fruit grading by colour machine vision: defect recognition.
Leemans, Vincent ULg; Destain, Marie-France ULg; Magein, Hugo ULg

in Acta Horticulturae (2000), (517), 405-412

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See detailQuality in Web activities through case studies over an integrated platform
Poumay, Marianne ULg; Leclercq, Dieudonné ULg; Demily, Fabian

in Wagner, E. (Ed.) Research and innovation in open and distance learning : proceedings of the first research workshop of EDEN (European Distance Education Network), Prague (2000)

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See detailQuality indicators for district heating networks
Pacot, Pierre-Emmanuel ULg; Reiter, Sigrid ULg

in Proceedings of the International Conference CISBAT 2011 - Clean Tech for sustainable buildings - From Nano to urban scale (2011)

District heating networks are very common energy systems all over the world but only few studies have been carried out to assess their performances through quality indicators. These indicators express ... [more ▼]

District heating networks are very common energy systems all over the world but only few studies have been carried out to assess their performances through quality indicators. These indicators express district heating performances through different points of view. Four ones are developed in this study: energy sources, efficiencies, heat delivering equipments characteristics and environmental efficiency as a sum up. First, the only energy indicator generally used is the primary energy factor (PEF), which quantifies the primary energy use of a device. However it does not give a complete insight of the whole energy use of district heating networks. Two other parameters have to be stated for this purpose: primary energy efficiency and the energy share. Second, district heating efficiencies are generally not been taken into account unless sometimes the only amount of heat losses. A first indicator is defined to quantify networks heat losses relatively to the amount of heat delivered to customers. To take heat plant efficiencies into account, a more global indicator is defined. Its definition is close to a seasonal efficiency and it permits comparisons with other heating systems. Third, indicators have been defined for heat plants equipments. Their aim is to permit stakeholders to check networks management of district heating companies. Two indicators are defined: one measures subscripted power relatively to network length and the other one represents the fictitious number of plants working hours while maximum plants power was delivered all the year. Finally, environmental efficiency is stated. This analysis can include different aspects: green house gas emissions, water use and other pollutants emissions. For both design and management of district heating networks, an indicator representing CO2 emissions appears to be the most suitable one. Expressed relatively to delivered energy, it can be seen as a sum up of previous indicators because result of bad performances increases these emissions. In this paper, these eight indicators are defined and their use is highlighted by a comparison of four different Finnish district heating networks. [less ▲]

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See detailQuality management : lessons of Belgian experiences
Lebailly, Philippe ULg; Burny, Philippe ULg

in Journal of Science and Technology = Khoa Học Và Công Nghệ (2011), 49(6A), 11-12

Detailed reference viewed: 31 (17 ULg)
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See detailQuality meshing algorithms for accurate and efficient cardiovascular simulations
Marchandise, E.; Sauvage, E.; Remacle, J.-F. et al

in Nithiarasu, P.; Lohner, R. (Eds.) Procedings of the 2nd International Conference on Mathematical and Computational Biomedical Engineering (CMBE2011) (2011, April)

Detailed reference viewed: 11 (0 ULg)