New Paper (URADTE CRAPC):Artificial neural network modeling of cefixime photodegradation by synthesized CoBi2O4 nanoparticles

New Paper (URADTE CRAPC):Artificial neural network modeling of cefixime photodegradation by synthesized CoBi2O4 nanoparticles

À LA UNE, CRAPC News, Publication Scientifique, Publication Scientifique Division Santé, URADTE
  • Oussama Baaloudj, Laboratory of Reaction Engineering, Faculty of Mechanical Engineering and Process Engineering USTHB, BP 32, Algiers, Algeria
  • Noureddine Nasrallah, Laboratory of Reaction Engineering, Faculty of Mechanical Engineering and Process Engineering USTHB, BP 32, Algiers, Algeria
  • Mohamed Kebir, Laboratory of Reaction Engineering, Faculty of Mechanical Engineering and Process Engineering USTHB, BP 32, Algiers, Algeria
  • Research Unit on Analysis and Technological Development in Environment (URADTE-CRAPC), BP 384, Bou-Ismail Tipaza, Algeria
  • Bouzid Guedioura, Reactor division, Nuclear Research Center, Draria, Algeria
  • Abdeltif Amrane, Univ Rennes – ENSCR / UMR CNRS 6226 “Chemical Sciences of Rennes” ENSCR, Campus de Beaulieu, 11, allée de Beaulieu – CS 50837 – 35708 Rennes, 35708, Rennes, France
  • Phuong Nguyen-Tri, Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam
  • Université du Québec à Trois-Rivières (UQTR), Trois-Rivières, Québec, G9A 5H7, Canada
  • Sonil Nanda & Aymen Amin Assadi Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5A9, Canada

Received: 8 August 2020 /Accepted: 16 November 2020

© 2020 Springer Nature Switzerland AG. Part of Springer Nature

  • Environmental Science and Pollution Research

Abstract

CoBi2O4 (CBO) nanoparticles were synthesized by sol-gel method using polyvinylpyrrolidone (PVP) as a complexing reagent. For a single phase with the spinel structure, the formed gel was dried and calcined at four temperatures stages. Various methods were used to identify and characterize the obtained spinel, such as X-ray diffraction (XRD), scanning electron micrograph (SEM-EDX), transmission electron microscope (TEM), Fourier transform infrared (FT-IR), X-ray fluorescence (XRF), Raman, and UV-Vis spectroscopies. The photocatalytic activity of CBO was examined for the degradation of a pharmaceutical product cefixime (CFX). Furthermore, for the prediction of the CFX degradation rate, an artificial neural network model was used. The network was trained using the experimental data obtained at different pH with different CBO doses and initial CFX concentrations. To optimize the network, various algorithms and transfer functions for the hidden layer were tested. By calculating the mean square error (MSE), 13 neurons were found to be the optimal number of neurons and produced the highest coefficient of correlation R2 of 99.6%. The relative significance of the input variables was calculated, and the most impacting input was proved to be the initial CFX concentration. The effects of some scavenging agents were also studied. The results confirmed the dominant role of hydroxyl radical OH in the degradation process. With the novel CoBi2O4/ZnO hetero-system, the photocatalytic performance has been enhanced, giving an 80% degradation yield of CFX (10 mg/L) at neutral pH in only 3 h.

© 2020 Springer Nature Switzerland AG. Part of Springer Nature

https://link.springer.com/article/10.1007/s11356-020-11716-w

New Paper CRAPC:Porous Silica Monolithic Polymers for Micromachined Gas Chromatography Columns: A Featured Phase for Fast and Efficient Separations of Light Compounds Mixtures

New Paper CRAPC:Porous Silica Monolithic Polymers for Micromachined Gas Chromatography Columns: A Featured Phase for Fast and Efficient Separations of Light Compounds Mixtures

À LA UNE, CRAPC News, Publication Scientifique, Publication Scientifique Division Santé

Published in: IEEE Sensors Journal ( Volume: 20, Issue: 22, Nov.15, 15 2020)

Porous Silica Monolithic Polymers for Micromachined Gas Chromatography Columns: A Featured Phase for Fast and Efficient Separations of Light Compounds Mixtures

Authors


Imadeddine Azzouz

ESIEE Engineering, Noisy-le-Grand, France

Research Centre in Analytical Chemistry and Physics (CRAPC), Algiers, Algeria

Djahida Lerari

Materials Chemistry Division, Research Centre in Analytical Chemistry and Physics (CRAPC), Algiers, Algeria

Khaldoun Bachari

Research Centre in Analytical Chemistry and Physics (CRAPC), Algiers, Algeria

Abstract:

Since the late 1970s, approaches have been proposed to replace conventional gas chromatography apparatus with silicon-based microfabricated separation systems. Performances are expected to be much improved with miniaturization owing to the reduction of diffusion distances and better thermal management. When it is easy to microfabricate miniaturized parts, the main challenge consists, however, to produce stable, efficient, and functionalized columns. The purpose of the paper is to transpose and adapt monolith synthesis in-situ micromachined gas chromatography columns. Silica-based monolithic microcolumns based on the sol–gel process were tested in the course of high-speed gas chromatographic separations of light hydrocarbons mixture (C1–C4). At the optimum separation conditions, a very good resolution (2.14) for very light compounds (C1–C2) was reached on a 50 cm microcolumn at room temperature with a back-pressure within the range used at gas chromatography facilities (without external modification of the device). The versatility of these microelectromechanical systems (MEMS) columns was demonstrated with a high-temperature C1 – C2 separation, and unsaturated cyclic alkanes. Light halogenated alkanes were also successfully separated. These columns should be used in various applications related to oil/gas and environment field analyses.

https://ieeexplore.ieee.org/abstract/document/9130702/authors

New Paper CRAPC : Spherical NiCu phyllosilicate photocatalysts for hydrogen generation

New Paper CRAPC : Spherical NiCu phyllosilicate photocatalysts for hydrogen generation

À LA UNE, Publication Scientifique, Publication Scientifique Division Santé

International Journal of Hydrogen Energy

Available online 18 November 2020

Spherical NiCu phyllosilicate photocatalysts for hydrogen generation

Author links open overlay panel

Imane Ghiata Adel Saadia Khaldoun Bacharib Neil J.Covillec Amel Boudjemaaab

a Laboratory of Natural Gas, Faculty of Chemistry, USTHB, Algiers, Algeria

b Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, Bou-Ismail CP, 42004, Tipaza, Algeria

c DSI-NRF Centre of Excellence in Strong Materials and the Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, 2050, South Africa

Abstract

To enhance the photocatalytic performance of semiconductors, a highly active and durable SiO2@xNiCuPS photocatalyst was evaluated for photocatalytic hydrogen generation. The photocatalyst was prepared by a hydrothermal method using SiO2 spheres, and a 1:1 Cu:Ni mixture (5 and 10 wt%). The reaction gave a highly stable phyllosilicate material with a core@shell structure. The materials were characterized by a range of techniques. DRS data revealed indirect optical transitions at 1.5 eV and 2.75 eV for the SiO2@5NiCuPS and SiO2@10NiCuPS materials. The new photocatalysts were successfully tested for hydrogen generation under visible irradiation to give H2 yields of 184 and 47 μmol g−1. min−1 for SiO2@5NiCuPS and SiO2@10NiCuPS, respectively. The data suggest that the enhanced activity of adding Cu to Ni to form Ni/Cu phyllosilicates is not due to NiCu alloy formation but due to changes in the support morpholohgy brought about by metal-support interactions. The catalysts were stable over 4 repeat reaction cycles.

Keywords

Hydrogen Photocatalysis NiCu nanoparticles core@shell material

https://www.sciencedirect.com/science/article/abs/pii/S0360319920340817?fbclid=IwAR1vgDZPfcyH0LxEy92jKtUJrHV4yapXR0f0jCYACoYiz9Y_KCRF45WrOGc

Crystal structure, chemical reactivity, kinetic and thermodynamic studies of new ligand derived from 4-hydroxycoumarin: Interaction with SARS-CoV-2

Publication Scientifique, Publication Scientifique Division Santé

Author links open overlay panel

ChafiaAitRamdaneTerboucheaHasniaAbdeldjebaraAchourTerboucheaHouriaLakhdariaKhaldounBachariaThierryRoisnelbDidierHauchardc

aCentre de Recherche Scientifique et Technique en Analyses Physico-chimiques(CRAPC), BP384, Bou-Ismail, RP 42004, Tipasa, AlgeriabUniv Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000, Rennes, FrancecUniv Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France

Received 12 May 2020, Revised 30 June 2020, Accepted 15 July 2020, Available online 16 July 2020.

Abstract

Currently, Covid-19 pandemic infects staggering number of people around the globe and causes a high rate of mortality. In order to fight this disease, a new coumarin derivative ligand (4-[(pyridin-3-ylmethylamino]-2H-chromen-2-one) (LTA) has been synthesized and characterized by single-crystal X-ray diffraction, NMR, ATR, UV-Visible and cyclic voltammetry. Chemical reactivity, kinetic and thermodynamic studies were investigated using DFT method. The possible binding mode between LTA and Main protease (Mpro) of SARS-CoV-2 and their reactivity were studied using molecular docking simulation.

Single crystal X-ray diffraction showed that LTA crystallizes in a monoclinic system with P21 space group.

The reactivity descriptors such as nucleophilic index confirm that LTA is more nucleophile, inducing complexation with binding species like biomolecules. The kinetic and thermodynamic parameters showed that the mechanism of crystal formation is moderately exothermic.

The binding energy of the SARS-CoV-2/Mpro-LTA complex and the calculated inhibition constant using docking simulation showed that the active LTA molecule has the ability to inhibit SARS-CoV-2.

https://doi.org/10.1016/j.molstruc.2020.128918

La Direction de la Programmation de la Recherche, de l’Evaluation et de la Prospective (DPREP-DGRSDT) organise un webinaire sur la coopération internationale: Montage et Gestion des projets PRIMA.

La Direction de la Programmation de la Recherche, de l’Evaluation et de la Prospective (DPREP-DGRSDT) organise un webinaire sur la coopération internationale: Montage et Gestion des projets PRIMA.

archive, Publication Scientifique Division Santé, Revue de Press

La Direction de la Programmation de la Recherche, de l’Evaluation et de la Prospective (DPREP-DGRSDT) organise un webinaire sur la coopération internationale: Montage et Gestion des projets PRIMA.

Deux présentations vous sont programmées pour le dimanche 05/07/2020 par deux jeunes Enseignants-chercheurs coïncidant avec la fête de l’indépendance et de la jeunesse.

Dr. OMAR BEHADADA est maître de conférences à l’université de Tlemcen. Ses cours comprennent la logique floue, l’enseignement de l’anglais spécialisé. Il a un doctorat en analyse des données Big Data, son travail de recherche porte sur l’analyse des Big Data, l’application dans la recherche biomédicale et biologique et leur impact sur la santé, la nutrition, les écosystèmes et les effets sociaux.
Son expérience au sein de la coopération internationale comprend la coordination et la mise en œuvre d’un large éventail d’activités, de projets (H2020, PRIMA, CBHE Erasmus+, Intra Afric, …) et d’événements visant à faciliter la réussite de divers projets universitaires (Erasmus Mundus, MIC Erasmus+, institue Panafricain PAUWES, mobilité universitaire intra-africaine…).

Dr Mourad Latati est un Maitre de Conférence A à l’Ecole Nationale Supérieure Agronomique d’Alger. Son domaine de recherche se concentre sur l’étude du système agricole durable et efficace et l’évaluation de la résilience des cultures (monoculture céréales-légumineuses, cultures intercalaires, rotation) face au stress abiotique (N, C, P, Ca) et au changement climatique. Latati Mourad est chef du laboratoire d’amélioration de la production végétale intégrative à L’ENSA. Il a pu décrocher deux projets PRIMA (1 en section 1 et 1en section 2) et un projet international Arimnet2.

Formation Elsevier DGRSDT SNDL SUR Webinar

Formation Elsevier DGRSDT SNDL SUR Webinar

archive, Publication Scientifique, Publication Scientifique Division Santé, Revue de Press

#Dgrsdt #Formation_Elsevier #Webinar #SNDL
#Prof_Hafid_Aourag #demain_le18Mai2020
📣📢🔴#Rendez vous au #webinar le 18 Mai 2020 à 12h00 (midi) heure locale de l’Algérie, pour une formation de grande valeur et riche en contenu pour aider les chercheurs et les auteurs Algériens à ameliorer leur processus de recherche scientifique
♦️Présentateurs de webinaires:
⭕#M_Hafid_Aourag : DG de La Recherche Scientifique – DGRSDT
⭕M. Said Berrouk: Chef de Département de l’Information S&T – SNDL
⭕Mme  Nadine Iskander : Conseillère de Recherche @ Elsevier
✅#Accedez_au_webinar: https://elsevier.zoom.us/j/91129104704?pwd=YVM4TkN3TFVLL3R6YmtiMXJtQ1hyQT09
#Inscrivez_vous: https://researcheracademy.elsevier.com/workshop/737c6559-3556-4595-a8ef-37ed8a538111

recently published article in the prestigious German press DW recognising our scientific contribution on the potential repurposing of artemisinin against SARS-CoV-2.

recently published article in the prestigious German press DW recognising our scientific contribution on the potential repurposing of artemisinin against SARS-CoV-2.

archive, Publication Scientifique, Publication Scientifique Division Santé, Revue de Press, URADTE

A recently published article in the prestigious German press DW recognising our scientific contribution on the potential repurposing of artemisinin against SARS-CoV-2. The article also recognised the current efforts of other scientists from the Max Planck Institute in Potsdam, Germany, namely the research group of Prof. Peter Seeberger, in collaboration with investigators from Denmark in performing preclinical studies of this active ingredient against the virus. Very well done to everyone contributing to the success of this project, especially my colleague Dr. Smain Chemat. #crapc #artemisinin #sweetwormwood #sars_cov_2 #drug_repurposing
https://amp-dw-com.cdn.ampproject.org/c/s/amp.dw.com/de/angebliches-covid-19-wundermittel-artemisia-im-testlabor/a-53428761

New Article [MOLSTR_128325] published in Journal of Molecular Structure

New Article [MOLSTR_128325] published in Journal of Molecular Structure

archive, Bibliothèque, Publication Scientifique, Publication Scientifique Division Santé, Revue de Press

Multicomponent and 1,3-dipolar cycloaddition synthesis of triazole- and isoxazole-acridinedione/xanthenedione heterocyclic hybrids: Cytotoxic effects on human cancer cells

https://www.sciencedirect.com/science/article/pii/S0022286020306505?dgcid=author

Author links open overlay panelAbdelkaderNaouriabcAmarDjemouiabMouhamad RidhaOuahranidMokhtar BoualemLahrechbNajetLemouaricDjenisa H.A.RochaefgHélioAlbuquerqueeRicardo F.MendesfFilipe A.Almeida PazfLuisa A.HelguerogKhaldounBacharicOualidTalhiceArtur M.S.Silvae

Abstract

A new series of diverse 1,2,3-triazole-acridinedione/xanthenedione and 1,2-isoxazole-acridinedione/xanthenedione heterocyclic hybrids have been synthesized via 1,3-dipolar coupling reaction of N/O-substituted-acridinedione-alkyne or O-substituted-xanthenedione-alkyne substrates with various aromatic azides or oximes. In all cases, the cycloaddition is totally regioselective. The chemical structures of the synthesized compounds are determined using 2D NMR and are further confirmed by single-crystal X-ray diffraction analysis. Preliminary in vitro cytotoxic assays on two human breast cancer cell lines (MDA-MB-231, T47-D) and one prostate cancer cell line (PC3) are performed on some selected compounds. The most active O-1,2,3-triazole-xanthenedione hybrid displays the best cytotoxicity effects with IC50 ≤ 20 μM in breast cancer and IC50 = 10 μM in prostate cancer cell lines.

Read the 1st Newsletter of the    #PRIMA #SUSTAINOLIVE project selected as part of   the 🇪🇺 #EU Horizon2020 Framework for   Research and Innovation.

Read the 1st Newsletter of the #PRIMA #SUSTAINOLIVE project selected as part of the 🇪🇺 #EU Horizon2020 Framework for Research and Innovation.

archive, Publication Scientifique, Publication Scientifique Division Santé, Revue de Press

PRIMAprojects #Research #Innovation #EU

Read the 1st Newsletter of the #PRIMA #SUSTAINOLIVE project selected as part of
the 🇪🇺 #EU Horizon2020 Framework for
Research and Innovation.
Its main goal will be to build research and innovation ca-
pacities to develop new knowledge, concepts and innovative
solutions based on agroecological concepts and the exchange
of knowledge between the main actors in the olive sector.
#PRIMAprojects #Research #Innovation #EU
Subscribe at:
https://sustainolive.eu/newsletter/?lang=it

➡️https://lnkd.in/gtNVnAb

مقال لجريدة النصر يتكلم عن تقنية التشخيص السريع للكشف عن كوفيد 19

مقال لجريدة النصر يتكلم عن تقنية التشخيص السريع للكشف عن كوفيد 19

archive, Publication Scientifique, Publication Scientifique Division Santé, Revue de Press


تناولت جريدة النصر في مقال لها اليوم تحت عنوان مركز كرابسي يعمل على تطوير تقنية التشخيص السريع المصلي، موجه الكشف عن حاملي فيروس كورونا بدون أعراض بفضل فريق بحث تابع لمركز البحث العلمي والتقني في التحاليل الفيزيائية والكيميائية.