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Evaluation of Quality Parameters of White and Brown Eggs in Lebanon

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American Journal of Analytical Chemistry 2019年第10期10卷 488-503页

作者： Karine Joubrane Dima Mnayer tayssir hamieh Georges Barbour Rabih Talhouk Elie Awad Faculty of Agricultural Engineering and Veterinary Medicine Lebanese University Beirut Lebanon Faculty of Sciences Lebanese University Beirut Lebanon Laboratory of Materials Catalysis Environment and Analytical Methods (MCEMA) Faculty of Sciences Doctoral School of Sciences and Technology (EDST) Lebanese University Beirut Lebanon Department of Biology Faculty of Art and Sciences American University of Beirut Beirut Lebanon Food Safety Lebanese Commission Beirut Lebanon.

The quality traits of fresh marketable chicken eggs collected during winter, autumn and summer periods from different local markets in Lebanon were evaluated in order to understand the reproductive fitness of the chicken and the correlation between collection dates. A total of 2000 brown and white eggs were analyzed and compared for their external quality parameters such as egg weight, length, width, size, shell thickness, specific gravity and for their internal quality traits such as Haugh unit, yolk diameter, yolk color, and yolk height. Results show that egg weight and size varied markedly and tended to be smaller during summer period. A significant difference was found between white and brown eggs in some quality traits such as egg weight, shell thickness, egg length, and yolk diameter parameters. Egg quality parameters were significantly reduced during summer season where eggs are exposed to high temperature conditions. For grading analysis, 80% of the total eggs were classified as A with a significant difference (p < 0.05) between white and brown egg and during collection dates. Overall, brown eggs graded better than white eggs in external quality cleanliness and shape. Based on our analysis, the results of this study show that Lebanese eggs are of good quality and suggest that proper egg handling and storage conditions should be applied especially at warm environmental conditions to improve egg quality during summer season.

关键词： Brown and White Eggs Egg Quality Control Quality Parameters

Impact of Plastic Packaging Materials and Storage Time on the Quality Parameters of Lebanese Extra Virgin Olive Oil under Real-Time Storage Conditions

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American Journal of Analytical Chemistry 2019年第12期10卷 647-665页

作者： Carla Zarazir Mohamad Rajab Houssam Obeid Joumana Toufaily Imad Toufeili tayssir hamieh Laboratory of Materials Catalysis Environment and Analytical Methods Laboratory (MCEMA) Lebanese University Hadath Lebanon Laboratory of Applied Studies to the Sustainable Development and Renewable Energies (LEADDER) EDST Lebanese University Hadath Lebanon Department of Nutrition and Food Sciences American University of Beirut (AUB) Beirut Lebanon

Scarce information is currently available relative to the use of polymeric materials as storage containers for extra virgin olive oil. This paper was devoted to study and compare the impact of glass and 3 types of packaging materials—polyethylene terephthalate (PET), high density polyethylene (HDPE), and polylactic acid (PLA) on Lebanese extra virgin olive oil (EVOO) up to 9 months under non-accelerated storage conditions. The acidity, peroxide value (PV), K232, K270, fatty acid profile, overall migration, and oil sorption into the packaging material were determined. Conventional titration, gas chromatography-mass spectrometry, and spectrophotometry were used to quantify the outcome measures at baseline, 3, 5, 7, and 9 months. Mixed model ANOVA was applied to assess differences according to polymer type and storage period at P 232 and K270), migration, and sorption significantly increased with increasing storage time for oil in contact with glass and plastic materials, especially between the 7th and 9th month of storage. Overall, PLA showed the least deterioration and interaction phenomena compared with PET and HDPE. While glass remains the best container for EVOO, PLA could potentially replace PET and HDPE for short-time storage under conventional storage conditions in Lebanese households.

关键词： Extra Virgin Olive Oil Polymer Storage Overall Migration Fatty Acids

High Quality Bio-Oil Obtained from Catalyzed Pyrolysis of Olive Mill Solid Wastes in a Bi-Functional Reactor

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Materials Sciences and Applications 2021年第1期12卷 52-77页

作者： Nabil Tabaja Ahmad Kassas Soumaya hamieh Rana Haidar Maria-Laura Foddis Joumana Toufaily T. Jean Daou tayssir hamieh MCEMA and LEADDER Laboratories Faculty of Sciences and EDST Lebanese University Hariri Campus Beirut Lebanon DICAAR—Dipartimento di Ingegneria Civile Ambientale e Architecttura Università de Cagliari Cagliari Italy Université de Haute Alsace Université de Strasbourg Axe Matériaux à Porosité Contr?lée (MPC) Institut de Science des Matériaux de Mulhouse (IS2M) Mulhouse Cedex France Invited Researcher at SATIE-IFSTTAR Université Gustave Eiffel Campus de Marne-La-Vallée Versailles France

Olive Mill Solid Wastes (OMSW) released in nature without any treatment is a major environmental problem in the Mediterranean region. In this work, the catalyzed pyrolysis of OMSW has been investigated. A catalyst based on SBA-15 mesoporous silica doped with chromium ferrite nanoparticles was prepared by the double solvent technique (DS). The prepared catalyst was characterized by scanning electron microscopy (SEM), Wide and Small Angle X-ray Scattering (WAXS, SAXS), Energy Dispersive X-ray (EDX) and FT-IR spectroscopies. Reverse spinel chromium ferrite nanoparticles were located inside the SBA-15 pores as confirmed by SEM images. The obtained catalyst was tested for pyrolysis reactions of OMSW. Several parameters were studied to optimize the conditions of the pyrolysis reaction in order to increase the bio-oil conversion yield. The GC-MS results demonstrated that the quality of the obtained bio-oil was improved by decreasing the quantity of phenolic and oxygenated components as well as the size of the obtained molecules. The produced bio-oil from pyrolysis of OMSW is identical to that obtained from the pyrolysis of commercial cellulose under the same conditions. A 37% conversion yield of bio-oil was obtained for the best conditions.

关键词： Energy Conversion Bio-Oil Biomass Pyrolysis Reactor Olive Mill Solid Wastes SBA-15 Mesoporous Silica

Study of the Dispersive Component of the Surface Energy of Polylactides by Inverse Gas Chromatography at Infinite Dilution

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American Journal of Analytical Chemistry 2020年第3期11卷 129-136页

Inverse gas chromatography at infinite dilution is a powerful technique that can be advantageously used to characterize the surface physicochemical properties of solid substrates as oxides and polymers in both forms of powder or fibres. In the case of polymer, this technique can be used to determine the second order transition phenomena temperatures. This paper was devoted to the determination of the glass transition temperature of polylactide polymer. The dispersive component of the surface energy ?of polylactides was determined by inverse gas chromatography at infinite dilution. Various theoretical models were used to deduce the dispersive component of the surface energy of the solid substrates. These models are based on the calculation of the molecular areas of adsorbed molecules on the polymer surface: geometrical model, cylindrical molecular model, liquid density model, BET method, Kiselev results and the two-dimensional Van der Waals and Redlich-Kwong equations. The curves relative to the variation of as a function of the temperature showed a specific graph with a maximum value of ?at a certain particular temperature characteristic to the investigated polylactide polymer. In fact, the maxima of ?indicated the presence of glass transition temperature Tg of polylactide whatever the molecular model used. This study showed a glass transition temperature equal to 64°C confirming that obtained by other studies.

关键词： Adsorption Surface Area Surface Energy Retention Volume N-Alkanes Equations of State

Sintering Study of Ceramic Material Based on Magnesium Titanate in Presence of Lithium Fluoride Additives

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材料科学与工程（中英文A版） 2012年第7期2卷 550-559页

作者： Ahmad Kassas Jerome Bernard Ce1ine Lelievre David Houivet tayssir hamieh Laboratory of Materials Catalysis Environment and Analytical Methods (MCEMA-CHAMSI) Faculty of AgriculturalEngineering and Veterinary Medicine and Faculty of Sciences Lebanese University Beirut Lebanon LUSAC (EA4253) Site Universitaire B.P. 78 50130 CHERBOURG-OCTEVILLE France

Ceramic porous MgTiO3 materials have been prepared by classical solid-state route. The sintering of ceramic samples with different LiF contents was studied using dilatometric, thermogravimetric, X-ray diffraction and microstructural analysis. The investigations results showed that the microstructure and porosity of samples were sensitive to LiF percents which generated a liquid phase eutectic (LiF-MgF2), during the heating. Also, the Mg/Ti ratio took part in the structure formation of the ceramic. High grains size layers with cubic orientation were detected at the surface of pellets sintered in air, at 900-1,000 °C, identified as Li2MgTiO4 phase, regardless of LiF amount. At 1,100 °C, the Mg2TiO4 compound, rich in Li, was found on the surface. The pores distribution in studied ceramics; depending on sintering temperature and LiF contents, has been obtained by Mercury porosimetry measurements. In these experimental conditions, dense ceramics could not be obtained, independently of the LiF amount.

关键词：陶瓷材料烧结温度氟化锂钛酸镁添加剂 MgTiO3 基础微观结构

Multivariate Spatial and Temporal Analysis to Study the Variation of Physico-Chemical Parameters in Litani River, Lebanon

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American Journal of Analytical Chemistry 2021年第11期12卷 373-391页

作者： Ali Hayek Samir Abbad Andaloussi Nabil Tabaja Joumana Toufaily Evelyne Garnie-Zarli tayssir hamieh Laboratory of Materials Catalysis Environment and Analytical Methods Laboratory (MCEMA) EDST FS Lebanese University Hadath Lebanon Laboratory of Applied Studies for Sustainable Development and Renewable Energy (LEADDER) EDST Lebanese University Hadath Lebanon Laboratoire Sol Eau Systèmes Urbains (LEESU) Université Gustave Eiffel Paris France Faculty of Science and Engineering Maastricht University Maastricht Netherlands

Water quality of Litani River was deteriorated due to rapid population growth and industrial and agricultural activity. Multivariate analysis of spatio-temporal variation of water quality is useful to improve the projects of water quality management and treatment of the river. In this work, analysis of samples from different locations at different seasons was investigated. The spatio-temporal variation of physico-chemical parameters of the water was determined. A total of 11 water quality parameters were monitored over 12 months during 2018 at 3 sites located in different areas of the river. Multivariate statistical techniques were used to study the spatio-temporal evolution of the studied parameters and the correlation between the different factors. Principal Component Analysis (PCA) was applied to the responsible factors for water quality variations during wet and dry periods. The multivariate analysis of variance (MANOVA) was also applied to the same factors and gives the best results for both spatial and temporal analysis. A black point of agricultural, industrial and sewage water pollution was identified in Jeb-Jennine station from the high concentrations of ammonia, sulfate and phosphate. This difference was proved by the major changes in the values of the parameters from one station to the other. Jeb-Jennine represents a main pollution area in the river. The high ammonia, sulfate and phosphate concentrations result from the important agricultural, industrial and sewage water pollution in the area. A high bacterial activity was highlighted in Jeb-Jennine and Quaroun stations because of the presence of the high nitrite concentrations in the two locations. All parameters are highly affected by climate factors, especially temperature and precipitation. TDS, salinity, electrical conductivity and the concentrations of all pollutants increase during wet season affected by the runoff. Other factors can affect the water quality of the river for example geographical fe

关键词： Water Quality Litani River Principal Component Analysis Seasonal Variation Spatial Variation

Humidity Sensitive Characteristics of Porous Li-Mg-Ti-O-F Ceramic Materials

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American Journal of Analytical Chemistry 2013年第2期4卷 83-89页

作者： Ahmad Kassas Jérome Bernard Céline Lelièvre David Houivet Hassan Lakiss tayssir hamieh Laboratory of Materials CatalysisEnvironment and Analytical Methods(MCEMA/CHAMSI)Doctoral School of Sciences and Technology(EDST)Faculty of Agricultural Engineering and Veterinary Medicine and Faculty of SciencesLebanese UniversityBeirutLebanon LUSAC(EA4253) Site UniversitaireCherbourg-OctevilleFrance Faculty of Engineering Lebanese UniversityBeirutLebanon

Ceramic porous MgTiO3 materials have been prepared by classical solid-state route. The sintered pellets of MgTiO3 with different LiF contents were characterized for humidity-sensing application. The sintered disks of these mixtures were subjected to capacitance measurements at 20℃as function of the relative humidity from which revealed that the Mixture MgTiO3 + 2% LiF (w/w) has the better characteristics. The disks were subjected to DC resistance measurements as a function of relative humidity in the range 15% - 95% RH. The selectivity of this material was discussed and compared to commercial sensor results. The response and recovery characteristics were assessed.

关键词： Ceramic Humidity Sensor Magnesium Titanate Li_(2)MgTiO_(4) Capacitance Resistance

Evaluation of the Physico-Chemical Properties of the Waters on the Litani River Station Quaraoun

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American Journal of Analytical Chemistry 2020年第2期11卷 90-103页

作者： Ali Hayek Nabil Tabaja Samir Abbad Andaloussi Joumana Toufaily Evelyne Garnie-Zarli Abbas El Toufaili tayssir hamieh Laboratory of Materials Catalysis Environment and Analytical Methods Laboratory (MCEMA) EDST FS Lebanese University Hadath Lebanon Laboratory of Applied Studies for Sustainable Development and Renewable Energy (LEADDER) EDST Lebanese University Hadath Lebanon Laboratoire Sol Eau Systèmes Urbains (Leesu) Université Paris Est Paris France

Water security is a very important purpose facing the world in the last decay as one of the main consequences related to the risks of climate change. Water quality of Litani River’s at Quaraoun Lake station in Lebanon was evaluated by measuring various physicochemical parameters between 2008 and 2018. Samples were performed and analyzed the first of every month. Different analytical methods were used to determine the values of 11 physico-chemical parameters. Different statistical methods, such as Principal Component Analysis and the Times Series Representation, were applied to the results to evaluate the water characteristics, determine the operation of the ecosystem and study the correlation between the different parameters in the Quaraoun station. Industrial, agricultural and sewage water pollution of the Litani River were demonstrated by the high concentration of sulfate, phosphate and ammonia. High bacterial activity was proved from the high decreasing of the dissolved oxygen. Important correlations between the different parameters and between the parameters of the ecosystem and the weather were proved.

关键词： Litani River Water Characteristics Physico-Chemical Parameters Statistical Analysis

Reuse of Treated Municipal Wastewater under Different Growing Seasons for the Spinach Production

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American Journal of Analytical Chemistry 2018年第10期9卷 482-499页

作者： Majida Mcheik Joumana Toufaily Mariam Akil tayssir hamieh Marie Therese Abi Saab Bachar Haj Hassan Youssef Rouphael Laboratory of Materials Catalysis Environment and Analytical Methods Labortory (MCEMA) Ecole Doctorale des Sciences et de Technologies (EDST) FS (Science Faculty) Lebanese University Hadath Lebanon Laboratoire des Etudes Appliquées au Développement Durable et Energie Renouvelable (LEADDER) PRASE EDST Université Libanaise Hadath Liban Ministry of Agriculture Bir Hassan Lebanon Lebanese Agricultural Research Institute Fanar Lebanon University of Naples Naples Italy

A study was conducted in the Bekaa valley of Lebanon aiming to produce spinach leaves with treated effluent from Joub Janine plant under two growing seasons. Two experiments were laid out in a randomized complete block design. The effect of water quality on the qualitative, quantitative aspects and microbiological contamination of leaves was assessed. The results showed that the treated wastewater from Joub Janine plant was of category III. The highest mean marketable yields was recorded for T7 (4727 g·m-2) followed by T6 (3533 g·m-2) that were drip irrigated with treated wastewater. The uptake of K, Mg, Na and Cl was significantly 49.09%, 30.20%, 96.79% and 33.20%, respectively, higher in the spring than in autumn. The nitrate levels in all treatments and seasons were below the maximum level in foodstuffs as provided by the European Commission regulations. For the lipophilic fraction, there was no significant difference among treatments and also among treatments and seasons interacting together and the highest hydrophilic fraction and total phenols levels recorded for the autumn rather than the summer season. In general, pathogenic bacteria was absent on spinach leaves for all treatments and growing seasons.

关键词： Treated Wastewater Spinach Cultivation Mineral Composition Qualitative Parameters