1.  A.Boulahouache, M.Trari, N.Salhi, M.Boudjeloud Hydrogen production over Iron-doped industrial nickel catalyst via doped steam reforming ., The 8th Global Conference On Global Warming, 22-25 April 2019, Doha, Qatar.
2.  N.Salhi ,, A. Boulahouache , et al, Preparation and physical/electrochemical characterization of the heterosystem 10% NiO/ γ-Al2O3, ISSH2- November 27-28, Algiers 2019.
3. A. Ouradi, QT Nguyen, A. Benaboura, “Study of material sorption on a polymeric surface by quartz crystal microbalance with dissipation control (QCM-D)”. First International Symposium on Polymer Chemistry and Applications (SICPA-2019), Taghit, Algeria. February 23-25, 2019.
4. Benreka Soufiane, Kasmi-Mir Souad, Belal Rachid, Third International Symposium (MPM-2020), Larbi-Tebessi University, Tebessa, 25-27 February 2020.

1)M.Boudjeloud, A.Boulahouache, M.Trari, N.Salhi. Hydrogen production over Iron doped industrial nickel catalyst via methane steam reforming.

2) The 8th Global Conference On Global Warming, 22-25 April 2019, Doha, Qatar.

4. Belacel, F. Amrouche, A.Hadef, N.Salhi. The Effect of The Injection Pressure and Hydrogen Enrichment on No Emissions Resulting From Turbulent Non-Premixed Combustion of CH4. 5th International Conference on Advances in Mechanical Engineering Istanbul 2019, 17-19 December 2019. 

3)Mr. Belacel, A.Hadef, F.Amrouche, N.Salhi. Structure of a Laminar Diffusion Flame of the Hydrogen-Enriched CH4-Air Mixture”,. International Symposium On Sustainable Hydrogen ISSH2'19, Algiers 27-28 November 2019.

4)I.Sebai, R.Baghtache, A.Boulahouache, N.Salhi, M.Trari. Preparation and Physical

/Electrochemical Characterization of the Hetero-System 10%NiO/γ-Al2O3 International Symposium On Sustainable Hydrogen ISSH2'19, Algiers 27-28 November 2019.

5)A. Ouradi, QT Nguyen, A. Benaboura, “Study of sorption of materials on a polymeric surface by quartz crystal microbalance with dissipation control (QCM-D)”. First International Symposium on Polymer Chemistry and Applications (SICPA-2019), Taghit, Algeria. February 23-25, 2019. 

6) Benreka Soufiane, Kasmi-Mir Souad, Belal Rashid, Third International Symposium (MPM-2020), Larbi-Tebessi University, Tebessa, 25-27 February 2020.

7)M. Boudjeloud, O. Kheffache. A. Boulahouache, NOT. salhi. Efficient Hydrogen Production by steam reforming over Ni catalysts. Addition effect of La and Fe on Al2O3. 2nd international symposium on materials chemistry. ISMY2021, May 16-20, 2021. Virtual Scientific Meeting.

 8) Benlembarek, M. Trari, A.Boulahouache, R.Benrabaa, N.Salhi Photocatalytic hydrogen production over MFe2O4 (M=Ni,Co) spinel powders M.2nd international symposium on materials chemistry. ISMY 2021 Virtual Scientific Meeting, May 16-20, 2021.

9) Mr. Benlembarek, A. Boulahouache, M. Trari, R. Benrabaa, N. salhi.Synthesis and characterization of NiFe2O4 for photocatalytic hydrogen production.

9th Global Conference on Global Warming (GCGW-2021) August 1-4, 2021 Virtual conference, Croatia

10) Mr. Boudjeloud, A. Boulahouache, R.Benrabaa, N.Salhi. Efficient preparation of 10%wt(Ni-M)/α-Al2O3(M=La,Fe) catalysts active in steam reforming of methane for hydrogen production.

9th Global Conference on Global Warming (GCGW-2021) August 1-4, 2021 Virtual conference, Croatia.

11) Mr. Benlembarek, A. Boulahouache, Z. Benmaamar, M.Trari, R.Benrabaa,

1. salhi. Preparation and Characterizations of MgFe2O4 Spinel semiconductor.1st International Conference on Computational and Applied Physics-ICCAP'2021 2021 26-28 September 2021, Blida, Algeria.

12)Benreka Soufiane ; Boukanoun Meriem Karima and Kasmi-Peace Souad. Synthesis, characterization and antioxidant activity of thiazoloquinazolinethione derivatives. 1st International Webinar on Biological and Chemical Engineering. Blida-Algeria, November 10th& 11th, 2021. Blida-Algeria.

13)Hesse Bessi ; Ouedfeul Slimane, Hamza kahina, Boudine Boubkeur, Boudaren Chaouki "Photocatalytic activity of TiO2 Nanoparticles for blue methylene degradation" Oral at the 1st international webinar on biological and chemical Engineering Nov 2021, BLIDA-1 University

14) Bessi Hesse ; Ouedfeul Slimane , Hamza kahina “antioxidant activity of prickly fruit peels extract” Poster at the 1st international webinar on biological and chemical Engineering  November 2021 BLIDA-1 University

15)Hamza kahina, Bessi Hesse, Ait -Yahia Ahmed ,Touati Abdlkader « Free solvent reaction for oxazolidine synthesis » Oral at the 1st international webinar on biological and chemical Engineering entitled Nov 2021, BLIDA-1 University

16)Mr. BENLEMBAREK, A. BOULAHOUACHE, M.TRARI, R. BENRABAA, N. SALHI.

Preparation and Characterizations of MgFe2O4 Spinel semiconductor. September 26th-28th 2021/ Blida 1 University, Algeria. 1stInternational Conference on Computational & Applied Physics-ICCAP.DOI: 10.21467/abstracts.122. https://October 17-18, 2023  

16)yahi et al Synthesis and characterization of Ni-MgO nanoparticles 1st international webinar on biological and chemical engineering, faculty of natural and life sciences-blida1 university, algeria, on november 10th -11th, 2021

17) Abderahman Belafriekh , Noura Semache, Fatiha Benamia. Enzymatic synthesis of fructose fatty acid esters using oleic acid as acyl donor and lipase cross-linked enzyme aggregates as biocatalyst. 8th EuChemS Chemistry Congress. 01/09/2022/Portugal.

18) Hamza MEDJADJI, Ali BOULAHOUACHE, Nassima SALHI, Degradation of Methyl Orange by LaAl0.9 Fe0.1O3 nano-perovskite, International Conference on Environment Technologies and Sustainable Energy, https://icetse.crapc.dz/  

19)Hamza MEDJADJI, Nassima SALHI, Maroua BENLEMBAREK, Ali BOULAHOUA, Mohamed TRARI, CoFe2O4/LaAlO3 heterojunction for efficient photocatalytic hydrogen evolution, 26-28 October 2023, The 2nd Edition International Conference on Oil, Gas, and Petroleum Engineering.    

1) Benreka Soufiane , Kasmi-Mir Souad. Synthesis, characterization and antioxidant activity of thiazoloquinazolinone derivatives. 1st National Seminar on Bioactive Products and Biomass Valorization, (SNPBVB-1), November 16 and 17, 2021, Ecole Normale, KOUBA.

2) Boukanoun Meriem-Karima; Benreka Soufiane ; Kasmi-Mir Souad; William D. Synthesis of Peptide Derivatives Inhibiting Protein Kinases Synthesis of Peptide Derivatives Inhibiting Protein Kinases. 1st National Seminar on Bioactive Products and Biomass Valorization, (SNPBVB-1), November 16 and 17, 2021, Ecole Normale, KOUBA. 2021.

3) Benreka Soufiane , Boukanoun Meriem -Karima and Kasmi-Peace Souad. Synthesis, characterization and antioxidant activity of thiazoloquinazolinethione derivatives. 1st International Webinar on Biological and Chemical Engineering. Blida-Algeria, November 10th& 11th, 2021. Blida-Algeria2021.

4) Oudini Boutheyna, Boukanoun Karima, Kasmi-Mir Souad, Ati Fella, Benreka Soufiane, Ben abdelhamd Alaeddine Antioxidant activity and theoretical study of some arylidenes, The second national seminar on chemistry and its Application, http://lab.univ-batna .dz › lcmvar › comites-snca-2-2023  

5) Hesse Bessi ; Ouedfeul Slimane , Hamza kahina, Boudine Boubkeur, Boudaren Chaouki, “ Use of an Algerian plant in green synthesis of TiO2 nanoparticles » videoconferences, “ Post to National Seminar: Plant Resources, Natural Products and Health (RVPNS2021) on June 9,10,11 2021.

6) Hamza kahina, Bessi Hesse, Ait –Yahia Ahmed ,Touati Abdlkader “The contribution of anionic, cationic and non-ionic surfactants on the extraction of essential oil from a spontaneous plant “Rutamontana L”” “ Post to National Seminar: Plant Resources, Natural Products and Health (RVPNS2021) on June 9,10,11 2021.

7)Hamza kahina, Bessi Hesse, Ait –Yahia Ahmed ,Touati Abdelkader “Synthesis and identification of a series of phenolic nitrones with potential antioxidant activity” Oral at the 1st national seminar on Bioactive Products and Biomass Valorization. December 16-17, 2021, ENS Kouba, Algiers.

8)Y. Afir, N. Cherifi, A. Ouradi, F. Boukraa-Oulad Daoud, A. Benaboura, “Elaboration and characterization of binary materials based on bio-polymer”. First National Virtual Conference on Chemical Process and Environmental Engineering- NVCCPEE 2021, Biskra.

9) TALEB Meriem, Synthesis and characterization of N,C-protected amino acids, May 09-10, 2023, National Seminar of Applied Chemistry SNCA 2023 https://www.univ-blida.dz/evenement/  

10) Soumia GUERZIZ and Salim HAMMANI, Extraction of cellulose from wood waste, elaboration of nanocomposites PSU/Cellulose and PSU/Cellulose-g-PEG, March 2023, 10th symposium on chemistry and chemical engineering (10th SCCE), http://www.emp. mdn.dz/events/scce/index.html  

 11) Assia Bessi; Ouedfeul Slimane, Hamza kahina, Boudine Boubkeur, Boudaren Chaouki Use of an Algerian plant in green synthesis of TiO2 nanoparticles June 9,10,11, 2021. National Seminar: Plant Resources, Natural Products and Health,https://rvpns2021.webnode.fr / Blida University -1  

12)Hamza kahina, Bessi Hesse, Ait –Yahia Ahmed, Touati Abdlkader. The contribution of anionic, cationic and nonionic surfactants to oil extraction essential  from a spontaneous plant Rutamontana L June 9,10,11, 2021. National Seminar: Plant Resources, Natural Products and Health. https://rvpns2021.webnode.fr/

13) Y. Afir, N. Cherifi, A. Ouradi, F. Boukraa-Oulad Daoud, A. Benaboura. Development and characterization of biopolymer-based binary materials 2021 First National Virtual Conference on Chemical Process and Environmental Engineering https://fst.univ biskra.dz/index.php/589-activite/3914-the-1-st-national-virtual-conference-on-chemical-process-and-environmental-engineering-nvccpee-2021.

14) Maroua BENLEMBAREk, Nassima SALHI, Rafik BENRABA3, Ali BOULAHOUACHE, Mohamed TRARI Facile synthesis of spinel oxide nano-catalysts for photocatalytic H2 evolution Algiers December 14-15, 2022 1st National Seminar of Process Engineering Sciences: Applications and Innovations “SSGP'22 ”   www.fgmgp.usthb.dz/ssgp22.

15)M. Adjissa, D.Sellam, K.Ikkour, Nora Yahi, S. Dekkar Reforming of CH4 by CO2 on perovskite type catalysts supported by a

natural support. June 21 and 22, 2023. National Days of Material Sciences (JNSM'2023) https://webtv.univ-bejaia.dz/index.php/2023/06/ouverture des-days-national-des-sciences-of-matters-jnsm2023/

16) Maroua BENLEMBAREK, Nassima SALHI, Hamza MEDJADJI, Salah Eddine BERRABAH, Mohamed TRARI. Structural, magnetic, optical and Electrochemical Properties of ZnFe2O4 and its Photocatalytic Application for Hydrogen Production Chlef 03-04 October 2023 The First National Seminair on Chemistry ''FNSC-I'' https://www.univ-chlef.dz/FNSCI  

17)Hamza MEDJADJI, Ali BOULAHOUACHE, Nassima SALHI Effect of doping on the physical and optical properties of LaAlO3 nanoparticles 29-30 November 2023.The Second National Seminar on Chemistry and its Applications (SNCA-2-2023) https://labo. univ-batna.dz/lcmvar.

18) Hamza MEDJADJI, Ali BOULAHOUACHE, Nassima SALHI18)SYNTHESIS AND CHARACTERIZATION OF LaAl0.9Fe0.1O3 VIA SOL-GEL METHOD 03-04 October 2023.The First National Seminar on Chemistry FNSC'202  https://www.univ-chlef.dz/FNSC1

19) Hamza MEDJADJI, Maroua BENLEMBAREK, Ali BOULAHOUACHE, Mohamed TRARI, Nassima SA.SYNTHESIS AND CHARACTERIZATION OF LaAlO3 NANOPOWDERBY SOL-GEL METHOD, April 18, 2023. Scientific and Education day of the Faculty of chemistry. https://jspfch2023.wixsite.com/jspfch23

  https://jspfch2023.wixsite.com/jspfch23

1) I.Sebai, R.Baghtache, A. Boulahouache, N.Salhi, M.Trari

Preparation and Physical/Electrochemical Characterization of the Hetero-System 10%NiO/γ-Al2O3 Proceedings of the 3th International Symposium on Sustainable Hydrogen ISSH2-2019. November 27-28, 2019, Algiers, Algeria.

2)Mr. Belacel, A.Hadef, F.Amrouche, N.Salhi. Structure of a Laminar Diffusion Flame of the Hydrogen-Enriched CH4-Air Mixture”, Procedures of the 3th International Symposium On Sustainable Hydrogen ISSH2'19, Algiers 27-28 November 2019.

3)Mr. Boudjeloud, O. Kheffache. A. Boulahouache, N. salhi. Efficient Hydrogen Production by steam reforming over Ni catalysts. Addition effect of La and Fe on Al2O3. Proceedings of the 2nd international symposium on materials chemistry. ISMY 2021 16-20 May 2021. Virtual Scientific Meeting.

4)Mr. Benlembarek, Mr. Trari, A. Boulahouache , R.Benrabaa, N.Salhi. Photocatalytic hydrogen production over MFe2O4 (M=Ni,Co) spinel powders.

5)Proceedings of the 2nd international symposium on materials chemistry. ISMY 2021 Virtual Scientific Meeting, May 16-20, 2021. Virtual Scientific Meeting.

6)Mr. Benlembarek, A. Boulahouache, M. Trari, R. Benrabaa, N. salhi.

Synthesis and characterization of NiFe2O4 for photocatalytic hydrogen production. Procedures of the 9th Global Conference on Global Warming (GCGW-2021) August 1-4, 2021 Virtual conference, Croatia.

7) Mr. Boudjeloud, A. Boulahouache, R.Benrabaa, N.Salhi Efficient preparation of 10%wt(Ni-M)/α-Al2O3(M=La,Fe) catalysts active in steam reforming of methane for hydrogen production. Procedures of the 9th Global Conference on Global Warming (GCGW-2021) August 1-4, 2021 Virtual conference, Croatia.

8)ASSIA BESSI,  K.HAMZA,  B. BOUDINE,C. BOUDAREN Synthesis and characterization of polystyrene (PS)/Copper oxide Cunancomposites https://doi.org/10.21467/abstracts.122,

9)A.BESSI, B. BOUDINE,C. BOUDAREN “Green synthesis and characterization of Silver nanoparticles.” Abstracts of 1st International Conference on Computational & Applied Physics ICCAP'2021 (26th –28th September 2021) https://doi.org/10.21467/abstracts.122,

1)I.Sebai, R.Baghtache, A. Boulahouache, N.Salhi, M.Trari. Book Chapter in Advances in Renewable Hydrogen and Other Sustainable Energy Carriers, Springer, Abdallah khellaf, Editor, 2020, pages: 331-337.