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  1. AU="Lakbita, Omar"
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  1. Article ; Online: Potential End-Use of a Europium Binary Photoluminescent Ink for Anti-Counterfeiting Security Documents.

    Moudam, Omar / Lakbita, Omar

    ACS omega

    2021  Volume 6, Issue 44, Page(s) 29659–29663

    Abstract: Composed of two europium complexes doped in polyvinyl butyral as the host material, a novel photoluminescent ink has been formulated by synthesizing Eu(FAC) ...

    Abstract Composed of two europium complexes doped in polyvinyl butyral as the host material, a novel photoluminescent ink has been formulated by synthesizing Eu(FAC)
    Language English
    Publishing date 2021-10-27
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c03949
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Photoluminescence lifetime stability studies of β-diketonate europium complexes based phenanthroline derivatives in poly(methyl methacrylate) films.

    Essahili, Othmane / Ouafi, Mouad / Ilsouk, Mohamed / Lakbita, Omar / Duhayon, Carine / Mahi, Lhassane / Moudam, Omar

    ChemistryOpen

    2024  Volume 13, Issue 5, Page(s) e202300192

    Abstract: In this work, five phenanthroline derivatives substituted with different methyl groups have been selected to synthesize β-diketonate-based europium complexes to check the influence of the substitutions on the degradation effect of those complexes in poly( ...

    Abstract In this work, five phenanthroline derivatives substituted with different methyl groups have been selected to synthesize β-diketonate-based europium complexes to check the influence of the substitutions on the degradation effect of those complexes in poly(methyl methacrylate) (PMMA) films. The photophysical properties of Eu(III) complexes, including absorbance, excitation, and emission have been carefully investigated in solution, solid-state, and doped in PMMA film. In all these states, the complexes exhibit an impressive red emission at 614 nm with a high photoluminescence quantum yield of up to 85 %. The films have been exposed under outdoor, indoor, and dark storage stability lifetime conditions for 1200 hours. The photoluminescence measurements recorded every 400, 800, and 1200 hours demonstrated that the film containing europium complex with phenanthroline ligand substituted by a high number of methyl groups (Eu(TTA)
    Language English
    Publishing date 2024-01-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2655605-4
    ISSN 2191-1363 ; 2191-1363
    ISSN (online) 2191-1363
    ISSN 2191-1363
    DOI 10.1002/open.202300192
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Toward Net-Zero Emission Fertilizers Industry: Greenhouse Gas Emission Analyses and Decarbonization Solutions

    Ouikhalfan, Mohammed / Lakbita, Omar / Delhali, Achraf / Assen, Ayalew H. / Belmabkhout, Youssef

    Energy & fuels. 2022 Apr. 04, v. 36, no. 8

    2022  

    Abstract: The production of fertilizers has been evolving steadily in the last 300 years. It involves a high number of commodities and reagents that share a large portion of the costs and emissions of greenhouse gases (GHGs), particularly carbon dioxide (CO₂). ... ...

    Abstract The production of fertilizers has been evolving steadily in the last 300 years. It involves a high number of commodities and reagents that share a large portion of the costs and emissions of greenhouse gases (GHGs), particularly carbon dioxide (CO₂). Phosphorus, nitrogen, and potassium fertilizers components represent more than 200 million tonnes of production annually. Given that most of the fertilizer production process is dependent on fossil fuels as fuel and feedstock, the amount of CO₂ generated is at least 3 tonnes CO₂ per tonne of fertilizer. The introduction, in the future, of less intensive carbon technological components and lower energy-consuming separation and catalytic technologies in the fertilizers industry has the potential to reduce CO₂ emissions drastically. In this review, we thoroughly analyze the GHG emissions of the fertilizers industry over time and explore pathways to achieve viable and sustainable decarbonization solutions. In the review, we also aim to explore, whenever information is available, the factors (sources) and the ranges of GHG emissions in the different value chains of fertilizer plants. As a result, an overview of the literature on GHG emissions from synthetic fertilizers (N, P, K) industries will be given. More emphasis is on emissions that stem from the extraction of raw materials to final fertilizer products (energy source, efficiency, and fertilizer type) and transportation of intermediates within different sites of the plants (vehicle type, fuel type, and efficiency). A perspective analysis on possible recommendations for future net-zero carbon emissions and carbon capture technologies is also made.
    Keywords carbon ; carbon dioxide ; energy ; feedstocks ; greenhouse gas emissions ; industry ; nitrogen ; phosphorus ; potassium ; transportation
    Language English
    Dates of publication 2022-0404
    Size p. 4198-4223.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1483539-3
    ISSN 1520-5029 ; 0887-0624
    ISSN (online) 1520-5029
    ISSN 0887-0624
    DOI 10.1021/acs.energyfuels.2c00238
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Sustainable coating material based on chitosan-clay composite and paraffin wax for slow-release DAP fertilizer.

    El Assimi, Taha / Lakbita, Omar / El Meziane, Abdellatif / Khouloud, Mehdi / Dahchour, Abdelmalek / Beniazza, Redouane / Boulif, Rachid / Raihane, Mustapha / Lahcini, Mohammed

    International journal of biological macromolecules

    2020  Volume 161, Page(s) 492–502

    Abstract: The coating of fertilizers by polymers is one of the most efficient tools for their slow and control release into soil. This strategy avoids excessive use of the fertilizers and increases their availability to the crops needs. In the present paper, hydro- ...

    Abstract The coating of fertilizers by polymers is one of the most efficient tools for their slow and control release into soil. This strategy avoids excessive use of the fertilizers and increases their availability to the crops needs. In the present paper, hydro-soluble diammonium phosphates (DAP) fertilizer was double coated following the dip-coating process by chitosan-clay composites as inner coating and paraffin wax as an outer coating. The chitosan composite preparation and characterization were deeply investigated. The montmorillonite (MMT) clay incorporation as filler improves the water barrier diffusion, mechanical properties, and thermal stability of the composite. The combination of the swelling behavior of the chitosan-clay composite (inner coating) and the hydrophobic property of paraffin wax (outer coating) was confirmed by the water holding capacity evaluation and the phosphorus release essays in water and soil. Indeed, the phosphorus dissolution from the coated DAP granules was significantly delayed compared to the uncoated DAP. Moreover, the biodegradation study of composite material in soil and the biochemical oxygen demand (BOD) tests revealed that the coating system proposed could be considered as a carbon source for microorganisms after the fertilization process, which confirms its sustainability.
    MeSH term(s) Chitosan/chemistry ; Clay/chemistry ; Fertilizers ; Paraffin/chemistry ; Phosphates/chemistry ; Phosphorus/chemistry ; Polymers/chemistry ; Soil/chemistry ; Water/chemistry
    Chemical Substances Fertilizers ; Phosphates ; Polymers ; Soil ; ammonium phosphate ; Water (059QF0KO0R) ; Phosphorus (27YLU75U4W) ; Paraffin (8002-74-2) ; Chitosan (9012-76-4) ; Clay (T1FAD4SS2M)
    Language English
    Publishing date 2020-06-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2020.06.074
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  5. Article: Sustainable coating material based on chitosan-clay composite and paraffin wax for slow-release DAP fertilizer

    El Assimi, Taha / Lakbita, Omar / El Meziane, Abdellatif / Khouloud, Mehdi / Dahchour, Abdelmalek / Beniazza, Redouane / Boulif, Rachid / Raihane, Mustapha / Lahcini, Mohammed

    International journal of biological macromolecules. 2020 Oct. 15, v. 161

    2020  

    Abstract: The coating of fertilizers by polymers is one of the most efficient tools for their slow and control release into soil. This strategy avoids excessive use of the fertilizers and increases their availability to the crops needs. In the present paper, hydro- ...

    Abstract The coating of fertilizers by polymers is one of the most efficient tools for their slow and control release into soil. This strategy avoids excessive use of the fertilizers and increases their availability to the crops needs. In the present paper, hydro-soluble diammonium phosphates (DAP) fertilizer was double coated following the dip-coating process by chitosan-clay composites as inner coating and paraffin wax as an outer coating. The chitosan composite preparation and characterization were deeply investigated. The montmorillonite (MMT) clay incorporation as filler improves the water barrier diffusion, mechanical properties, and thermal stability of the composite. The combination of the swelling behavior of the chitosan-clay composite (inner coating) and the hydrophobic property of paraffin wax (outer coating) was confirmed by the water holding capacity evaluation and the phosphorus release essays in water and soil. Indeed, the phosphorus dissolution from the coated DAP granules was significantly delayed compared to the uncoated DAP. Moreover, the biodegradation study of composite material in soil and the biochemical oxygen demand (BOD) tests revealed that the coating system proposed could be considered as a carbon source for microorganisms after the fertilization process, which confirms its sustainability.
    Keywords biochemical oxygen demand ; biodegradation ; carbon ; chitosan ; clay ; composite materials ; fertilizers ; hydrophobicity ; montmorillonite ; paraffin wax ; phosphorus ; soil ; thermal stability
    Language English
    Dates of publication 2020-1015
    Size p. 492-502.
    Publishing place Elsevier B.V.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2020.06.074
    Database NAL-Catalogue (AGRICOLA)

    Full text online

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    In stock of ZB MED Cologne/Königswinter

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  6. Article ; Online: A simple and fast spectroscopy-based technique for Covid-19 diagnosis.

    Kitane, Driss Lahlou / Loukman, Salma / Marchoudi, Nabila / Fernandez-Galiana, Alvaro / El Ansari, Fatima Zahra / Jouali, Farah / Badir, Jamal / Gala, Jean-Luc / Bertsimas, Dimitris / Azami, Nawfal / Lakbita, Omar / Moudam, Omar / Benhida, Rachid / Fekkak, Jamal

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 16740

    Abstract: The coronavirus pandemic, which appeared in Wuhan, China, in December 2019, rapidly spread all over the world in only a few weeks. Faster testing techniques requiring less resources are key in managing the pandemic, either to enable larger scale testing ... ...

    Abstract The coronavirus pandemic, which appeared in Wuhan, China, in December 2019, rapidly spread all over the world in only a few weeks. Faster testing techniques requiring less resources are key in managing the pandemic, either to enable larger scale testing or even just provide developing countries with limited resources, particularly in Africa, means to perform tests to manage the crisis. Here, we report an unprecedented, rapid, reagent-free and easy-to-use screening spectroscopic method for the detection of SARS-CoV-2 on RNA extracts. This method, validated on clinical samples collected from 280 patients with quantitative predictive scores on both positive and negative samples, is based on a multivariate analysis of FTIR spectra of RNA extracts. This technique, in agreement with RT-PCR, achieves 97.8% accuracy, 97% sensitivity and 98.3% specificity while reducing the testing time post RNA extraction from hours to minutes. Furthermore, this technique can be used in several laboratories with limited resources.
    MeSH term(s) COVID-19 Testing/methods ; Humans ; RNA, Viral/analysis ; RNA, Viral/chemistry ; RNA, Viral/isolation & purification ; Spectroscopy, Fourier Transform Infrared ; Time Factors
    Chemical Substances RNA, Viral
    Language English
    Publishing date 2021-08-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-95568-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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