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About me

Prof. Manar Abdel-Raouf is a professor of polymer science at the Egyptian Petroleum Research Institute since 2012. has published more than 75 research papers in reputed journals and supervised more than 30 M.Sc. and Ph.D theses. She is PI for many research projects funded by STDF and she is an editorial board member and a reviewer for several international journals. Her main interests are environmental chemistry and green polymers.

Prof. Manar Abdel-Raouf is a professor of polymer science at the Egyptian Petroleum Research Institute since 2012. has published more than 75 research papers in reputed journals and supervised more than 30 M.Sc. and Ph.D theses. She is PI for many research projects funded by STDF and she is an editorial board member and a reviewer for several international journals. Her main interests are environmental chemistry and green polymers.

Degrees:

2000
Doctorate     Chemical Sciences

Publications resulting from Research
1- Propylene oxide - Ethylene oxide block copolymers as demulsifiers for water-in-oil emulsions. I- Effect of molecular weight and Hydrophilic-lipophilic balance (HLB) on the demulsification efficiency, N. N. Zaki, Manar El-Sayed Abdel-Raouf and A. A. Abdel azim. Monatshefte Fur Chemie (Chemical Monthly) of Austria, 127, 621(1996).
2- Propylene oxide - Ethylene oxide block copolymers as demulsifiers for water-in-oil emulsions. II- Effect of temperature, Salinity and pH- value on the demulsification efficiency. N. N. Zaki, Manar El-Sayed Abdel-Raouf and A. A. Abdel azim. Monatshefte Fur Chemie (Chemical Monthly) of Austria, 127,1239(1996).
3- PolyOxyEthylenated Bisphenol –A for Breaking Water-in-Oil Emulsions, N. N. Zaki, Manar El-Sayed Abdel-Raouf and A. A. Abdel azim. Polymer Advanced Technology, 7,805(1996).
4- Modified Unsaturated Polyester Resins Synthesized from Polyethylene Terephthalate Waste I: Synthesis and Curing Characteristics. M. Sh. Farahat, A. A. Abdel-azim and Manar El-sayed Abdel-raouf, Macromol. Material Eng., 283, 1-6, 2000.
5- Synthesis of some diol esters and their investigation as hydraulic brake fluid bases, Hamed Mohamed and Manar El-sayed Abdel-raouf, Al-Azhar Bull. Sci., vol 15, No.1, June, 2004.
6- Surface Activity and Light Scattering Investigation for Some Novel Aromatic Amine Surfactants", Ahmed M. Al-sabagh, Manar El-sayed Abdel-raouf, Colloid and Surface A,PhysicoChem. Eng.Aspects,251 (2004) 167-174.
7- Water Based Surfactants from Recycled Poly(ethylene terephthalate) Waste: their use as beach cleaners and in Petroleum Sludge Recovery", A. M. Atta, Manar El-Sayed Abdel-Raouf, A. M. Abdel-Raheim, A. A. Abdel-azim. Progress in Rubber, Plastics and Recycling Technology, Vol.20, No.4, 2004.
8- Compressive Properties and Curing Behavior of Unsaturated Polyester Resins In The Presence Of Vinyl Ester Resins Derived From Recycled Poly(Ethylene Terephthalate)", Ayman M. Atta, Sayed I. Elnagdy, Manar E. Abdel-Raouf, Shimaa M. Elsaeed and Abdel-Azim A. Abdel-Azim Journal Of Polymer Research, 12,373-383, 2005.
9- Surfactants from Recycled Poly (ethylene terephthalate) Waste as Water Based on Oil Spill Dispersants", Ayman M. Atta, Manar E. Abdel-Raouf, Nermine E. Maysour, A. M. Abdul-Rahiem and Abdel-Azim A. Abdel-Azim Journal of Polymer Research, Vol.13:39-52, 2006.
10- Curable Resins Based On From Recycled Poly(Ethylene Terephthalate) For Coating Applications, Atta, Ayman, Manar El-Sayed Abdel-Raouf & Elsaeed, Shimaa & Abdel-Azim, Abdel-Azim. Progress in organic coatings,55:50-59,2006.
Synthesis and Characterization of Some Degradable Polyesters". Manar El-Sayed Abdel-Raouf Material Research Innovation,10-2:1433-075, 2006.
12- Synthesis and Characterization of Novel Crude oil dispersants based on Ethoxylated Schiff base", Shimaa M. El-Saeed, Reem K. Farag, Manar E. Abdul-Raouf, Abdel-Azim A. Abdel-Azim. International J. of Polymeric Materials, 57:860-877, 2008.
13- Mechanical characterization and chemical resistances of cured unsaturated polyester resins modified with vinyl ester resins based on recycled poly (ethylene terephthalate), Atta, Ayman, Manar El-Sayed Abdel-Raouf & Elsaeed, Shimaa & Abdel-Azim, Abdel-Azim. J. Applied Polymer Sci.,103(5), pp.3175-3182, (2007).
14- Thermochemical Recycling of Mixture of Scrap Tyres and Waste Lubricating Oil", Manar E. Abdul-Raouf, Nermine E. Maysour, Abdul-Azim A. Abdul-Azim, Mahasen S. Amin. Energy Conversion and Management 51:1304–1310(2010).
15- Surface and thermodynamic properties of nonionic surfactants based on rosin maleic anhydride and acrylic acid adduct, Ayman M. Atta; Ahmed F. El-Kafrawy; Manar E. Abdel-Raouf; Nermine E. Maysour; Amani K. Gafer Journal of Dispersion Science and Technology, 31:567–576(2010).
16- Water-based oil spill dispersants based on rosin formaldehyde resins, Ayman M. Atta; Manar El-Sayed Abdel-Raouf; Nermine E. Maysour; Amani K. Gafer. Journal of Dispersion Science and Technology, 31:583–595(2010).
17- Surface Properties and Thermodynamic Parameters of Some Sugar- Based Ethoxylated Amine Surfactants: 1-Synthesis, Characterization, and Demulsification Efficiency", Manar El-Sayed Abdel-Raouf, Abdul-Raheim Mahmoud Abdul-Raheim, Abdel-Azim Ahmed Abdel-Azim Journal of surfactants and detergents (2011) 14:113–121.
18- Synthesis, Surface-Active Properties, and Emulsification Efficiency of Trimeric-Type Nonionic Surfactants Derived from Tris (2-aminoethyl) amine", Manar El-Sayed Abdul-Raouf, Abdul-Raheim Mahmoud Abdul-Raheim, Nermine El-Sayed Maysour and Hamed Mohamed J Surfact Deterg (2011) 14:185-193.
19- Synthesis and Study of the Surface Properties of Alkylnaphthalene and Alkylphenanthrene Sulfonates, Manar El-Sayed Abdul-Raouf, N. E. Maysour, A. M. Abdul-Raheim, Sh. M. El-Saeed and R. K. Farag Journal of surfactants and detergents (2011) 14:23–30.
20- Synthesis and characterization of some organic esters for the production of hydraulic brake fluids, Hamed Mohamed and Manar El-Sayed Abdul-Raouf Egyptian Journal of Petroleum, 18,2: 103-116(2009)
21- Sugar-Based Ethoxylated Amine Surfactants as Demulsifiers for Crude Oil Emulsions: 2- Demulsification of Different Types of Crudes, Ahmed Abdel-Azim, Manar El-Sayed Abdul-Raouf, Abdel Raheim Mahmoud Abdel-Raheim and Nermine El-Sayed Maysour Brazilian Journal of Petroleum and Gas | v. 4 n. 4 | p. 155-165 | 2010
22- Demulsifier Systems Applied to Breakdown Petroleum Sludge, Abdel-Azim A. Abdel Azim, Abdul-Raheim M. Abdul-Raheim, Reem K. Kamel, Manar E. Abdel-Raouf, Journal of Petroleum Science and Engineering 78 (2011) 364–370
23- Biodegradable polyoxyethylenated pentaerythritol quadric esters as oil spill dispersants, Manar El-Sayed Abdel-Raouf Tenside Surf. Det. 49 (2012) 2, 114-123.
24- Thermo-Catalytic Versus Thermo-Chemical Recycling of Polystyrene Waste, Manar El-Sayed Abdel-Raouf, Abdel Raheim Mahmoud Abdel-Raheim, Shimaa Mohamed El-Saeed. Waste Biomass Valor (2013) 4:37–46.
25- Some Sugar Fatty Ester Ethoxylates as Demulsifiers for Petroleum Sludge. Mahmoud A. Abdul-Raheim, Manar El-Sayed Abdel-Raouf, Nermine El-Sayed Maysour, Ahmed Fawzy El-Kafrawy, Ahmed Zaher Mehany, Ahmed Abdel-Azim. J Surfact Deterg (2013) 16:377–387.
26- PHEMA magnetic nanogels for removal of Cu (II) ions from aqueous solution, Manar El-Sayed Abdel-Raouf, Abdul-Raheim Mahmoud Abdul-Raheim, Ahmed Fawzy El-Kafrawy, Nermine El-Sayed Maysour, Amany Khalil Ibraheim and Abdel-Azim Ahmed Abdel-Azim, International Journal of Chemistry and Material Science Vol. 1(2), pp. 036-044, February 2013.
27- New Model to Eliminate Salts from Sarir Crude Oil: A Case Study, Elnori Elhaddad and Manar El-Sayed Abdel-Raouf, Int. J. Eng. Res. & Sci. & Tech. 2013, Vol. 2, No. 4, November 2013.
28- A new experimental method to prevent paraffin - wax formation on the crude oil wells: A field case study in Libya. Elnori E. Elhaddad, Alireza Bahadori, Manar El-Sayed Abdel-Raouf, and Salaheldin Elkatatny. Hemijska industrija· Jan. 2014 DOI: 10.2298/HEMIND130717040E
29- The Rheological Properties of Lube Oil With Terpolymeric Additives, N. S. Ahmed, A. M. Nassar, R. M. Nasser, M. E. Abdel Raouf & A. F. El-Kafrawy, Petroleum Science and Technology 32 (17), 2115-2122(2014)
30- Novel Terpolymers as Pour Point Depressants and Viscosity Modifiers for Lube Oil, N. S. Ahmed, A. M. Nassar, R. M. Nasser, M. E. Abdel Raouf & A. F. El-Kafrawy, Petroleum Science and Technology 32 (6), 680-687(2014)
31- Synthesis and investigation of hydrogel nanoparticles based on natural polymer for removal of lead and copper(II) ions, Reem K. Farag, Shimaa M. EL-Saeed, Manar E. Abdel-Raouf, Desalination and Water treatment, 57 (2016) 16150–16160, July.
32- Low cost biosorbents based on Modified Starch Iron Oxide Nanocomposites for Selective Removal of Some Heavy Metals from Aqueous Solutions, Reem K. Farag, Shimaa M. EL-Saeed, Manar E. Abdel-Raouf, Adv. Mater. Lett. 2016, 7(5), 402-409.
33- Adsorbents based on natural polymers for removal of some heavy metals from aqueous solution, Ahmed Fawzy El-Kafrawy, Shimaa Mohamed El-Saeed, Reem Kamel Farag Hend Al-Aidy El-Saied, Manar El-Sayed Abdel-Raouf, Egyptian Journal of Petroleum (2017) 26, 23–32.
34- Green chemistry approach for preparation of hydrogels for agriculture applications through modification of natural polymers and investigating their swelling properties. Manar Elsayed Abdel-Raouf, Shimaa Mohmaed El-Saeed, Elsayed Gamal Zaki, Ahmed Mohamed Al-Sabagh. Egyptian Journal of Petroleum 27 (2018) 1345–1355.
Published review articles:
35- Removal of Heavy Metals from Industrial Waste Water by Biomass-Based Materials: A Review, Manar El-Sayed Abdel-Raouf and Abdul-Raheim Mahmoud Abdul-Raheim. J Pollut Eff. Cont 2017, 5.
36- Applications of Guar Gum and its Derivatives in Petroleum Industry: Manar El-Sayed Abdel-Raouf and Abdul-Raheim Mahmoud Abdul-Raheim A Review. Egyptian Journal of Petroleum 27 (2018) 1043–1050https://doi.org/10.1016/j.ejpe.2018.03.005.
37- Rosin: Chemistry, Derivatives, and Applications: a review, Manar El-Sayed Abdel-Raouf and Abdul-Raheim Mahmoud Abdul-Raheim, BAOJ Chem 2018, 4: 1, 4: 039.
38- Wastewater Treatment Methodologies, Review Article, Manar Elsayed Abdel-Raouf, N.E Maysour, R. K.Farag and Abdul-Raheim Mahmoud Abdul- Raheim, Int J Environ & Agri Sci 2019, 3:1, 3: 018.
39- Guar Gum Based Hydrogels for Sustained Water Release Applications in Agriculture, a Review, Manar E. Abdel-Raouf, Curr Res Biopolymers 2: 111. DOI: 10.29011/CRBP-111.000011
Published chapters
40- Drug Delivery: pH-Sensitive Biopolymers, Encyclopedia of Biomedical Polymers, and Polymeric Biomaterials, Manar El-Sayed Abdel-Raouf. 2812-2822, (2016).
41- Cellulose-Based Superabsorbent Hydrogels, Springer International Publishing AG, part of Springer Nature 2018, Md. I. H. Mondal (ed.), Cellulose-Based Superabsorbent Hydrogels, Polymers and Polymeric Composites: A Reference Series, https://doi.org/10.1007/978-3-319-76573-0_11-1.
42- Applications of carboxymethyl cellulose in agriculture, Carboymethyl cellulose, vol. 2, p.289-311.
43- Factors affecting the stability of crude oil emulsions” in Crude Oil Emulsions, Composition and Stability by InTech.
44- Polystyrene-based magnetic hydrogels for elimination of some toxic metal cations from aqueous solutions, M. Keshawy & A. Abdul-Raheim & Manar El-Sayed Abdel-Raouf. Environmental Science and Pollution Research (2020) 27:26982–26997, https://doi.org/10.1007/s11356-020-08340-z
45- Preparation and characterization of a new family of bio-interpenetrating network hydrogel based on a green method, A. Abdelaziz, Sh. El-Saeed, E. Zaki, M. Abo aly, Manar Abdel-Raouf, A. Al-Sabagh, Egyptian journal of chemistry, Article 70, Volume 64, Issue 12, December 2021, Page 7451-7464.
46- Ionic liquids as demulsifiers for petroleum emulsions: review, Abdulraheim M.A. Hasan, Mohamed Elkeshawy, Alaa Abdel-Aziz and Manar El-Sayed Abdel-Raouf. Trends in chemical Engineering journal, vol 19, 2021, p1-17.
47- Organogels as oil sorbers for oil spill treatment. In: Sorbents Materials for Controlling Environmental Pollution, Current State and Trends, edited by: Avelino Nunez-Delgado, Elsevier, 2021, pages: 387-410.
48- Green polymers and their uses in petroleum industry: current state and future perspectives in: Crude Oil - New Technologies and Recent Approaches" by InTech, edited by Prof. Manar Abdel-raouf. DOI: 10.5772/intechopen.99409
49- Application of guar gum and its derivatives in agriculture, in: Gums, Resins and Latexes of Plant Origin, Reference Series in Phytochemistry, DOI https://doi.org/10.1007/978-3-030-76523-1, Springer, 2022.
50- Fruit peels as effective materials for heavy metal remediation from the aqueous environment, Emerging Techniques for Treatment of Toxic Metals from Wastewater. DOI: https://doi.org/10.1016/B978-0-12-822880-7.00024-8, pages 83-95.
51- Fruit stones as green materials for wastewater remediation. Emerging Techniques for Treatment of Toxic Metals from Wastewater. DOI: https://doi.org/10.1016/B978-0-12-822880-7.00024-8, pages 131-156.
52- Synthesis and investigation of green hydrogels for simultaneous removal of mercuric cations and methylene blue from aqueous solutions. Mohamed keshawy, Rasha Sameer and Manar El-Sayed Abdel-Raouf. Egypt. J. Chem. Vol. 65, No. 5 pp. 325 -335 (2022)
53- Atomic Force Microscopy Investigation of Smart Superabsorbent Hydrogels Based on Carboxymethyl Guar Gum: Surface Topography and Swelling Properties, Manar El-Sayed Abdel-Raouf, Abdel-raheim Mahmoud and Mohamed Keshawy, Material chemistry and physics, Volume 278, 15 February 2022, 125521.
54- Green starch/graphene oxide hydrogel nanocomposites for sustained release applications, Asmaa Sayed, Mai Yasser, Manar El‑sayed Abdel‑raouf, Reham Mohsen, 76, pages5119–5132 (2022), Chemical Papers, https://doi.org/10.1007/s11696-022-02236-7.
55- Gamma irradiation synthesis of pectin‑ based biohydrogels for removal of lead cations from simulated solutions, Asmaa Sayed, Fatma Hani, Manar El‑Sayed Abdel‑raouf and Ghada Adel Mahmoud, Journal of Polymer Research (2022) 29:372. https://doi.org/10.1007/s10965-022-03219-8.
56- Radiation Synthesis of Green Nanoarchitectonics of Guar Gum‑Pectin/Polyacrylamide/Zinc Oxide Superabsorbent Hydrogel for Sustainable Agriculture, Asmaa Sayed, Mai M. Mohamed Manar El‑Sayed Abdel‑raouf, Ghada A. Mahmoud, Journal of Inorganic and Organometallic Polymers and Materials https://doi.org/10.1007/s10904-022-02465-z. (2022) 32:4589–4600.
57- Green synthesis of chitosan/erythritol/graphene oxide composites for simultaneous removal of some toxic species from simulated solution, Asmaa Sayed, Azza M. Mazrouaa, Manal G. Mohamed, Manar El‑Sayed Abdel‑Raouf, Environmental Science and Pollution Research, 20 pages 25903–25919 (2023). https://doi.org/10.1007/s11356-022-23951-4.
58- Alkali-cellulose/ Polyvinyl alcohol biofilms fabricated with essential clove oil as a novel scented antimicrobial packaging material, Asmaa Sayed, Gehan Safwat, Manar Abdel-raouf, Ghada A. Mahmoud, Volume 5, June 2023, 100273, Carbohydrate Polymer Technologies and, Applications (2023), doi: https://doi.org/10.1016/j.carpta.2022.100273.
59- “Gamma Irradiation Synthesis of Carboxymethyl Chitosan-Nanoclay Hydrogel for the Removal of Cr(VI) and Pb(II) from Aqueous Media”. El-Sayed Abdel-Raouf, M., Kamal, R.S., Hegazy, D.E. and Asmaa Sayed.J Inorg Organomet Polym 33, 895–913 (2023). https://doi.org/10.1007/s10904-023-02543-w.
60- Chitosan-based architectures as an effective approach for the removal of some toxic species from aqueous media, Manar Abdel-Raouf, Reem Farag, Alaa Abdel-Aziz, Mohamed Keshawy, Abdulraheim Hasan, Ahmed Farag, ACS Omega, 2023 Mar 6;8(11):10086-10099. doi: 10.1021/acsomega.2c07264.
61- Efficient removal of Cr(VI) from aqueous solutions using chitosan/Na-alginate bio-based nanocomposite hydrogel, Ghada A.M., Asmaa Sayed, Manar El-Sayed Abdel-raouf, Mina Danial and Ayman Amin, J Appl Polym Sci. 2023;140:e53886.wileyonlinelibrary.com/journal/app. https://doi.org/10.1002/app.53886.
62- Optimization, Kinetics, and Isotherm Studies of Methyl Thioninium Chloride Removal from Simulated Solutions Using Chitosan Derivatives. Manar El-Sayed Abdel-Raouf, Reem Kamal Farag, Ahmed A. Farag, Mohamed Keshawy, Alaa Abdel-Aziz, and Abdulraheim Hasan, ACS Omega 2023, 8, 37, 33580–33592.
63- A Study on the Properties and Applications of Acrylate Terpolymers as Viscosity and Rheology Modifiers for Lube Oil Nasser, R.M., Ahmed, N.S., Nassar, A.M., Abdel Raouf, M.E., El-Kafrawy, A.F. Petroleum and Coal, 2023, 65(3), pp. 915–92.
64- In-depth experimental assessment of two new aminocoumarin derivatives as corrosion inhibitors for carbon steel in HCl media combined with AFM, SEM/EDX, contact angle, and DFT/MDs simulations. N.S. Abdelshafi, AhmedA. Farag, F. El-Taib Heakal, Al-shimaa Badran, K.M. Abdel-Azim, Abdel-Raouf Manar El-Sayed, Magdy A. Ibrahim Journal of Molecular Structure, Volume 1304, 15 May 2024, 137638.
65- Pour point depressants for waxy crude oil based on used sun flower oil, Manar El-Sayed Abdel-Raouf, Mohamed Keshawy, Taisir T. Khidr, Egyptian Journal of Chemistry.
66- Petroleum sludge formation and its treatment methodologies: a review. Environmental Science and Pollution Research (2024) 31:8369–8386. https://doi.org/10.1007/s11356-023-31674-3
67- Preparation and properties of montmorillonite incorporated natural rubber/ethylene propylene diene monomer rubber blends. Badr, M.M., Abdel-Raouf, M.E., Abdelaziz, A.I.E., Hasan, A.M.A., Abdeen, Z.I. Progress in Rubber, Plastics and Recycling Technology, 2024, 40(4), pp. 430–444.
68- Preparation and potential of chitosan-based/Al2O3 green hydrogel composites for the removal of methyl red dye from simulated solution. Ahmed, E.M., Feteha, A., Kamal, R.S., Behalo, M.S., Abdel-Raouf, M.E. Environmental Science and Pollution Research, 2024, 31(37), pp. 49626–49645.
69- Novel green sustainable hydrogel composites based on guar gum and algal species for wastewater remediation. Keshawy, M., Kamal, R.S., Abdelhamid, A.E., Amal Amin, Ahmed Labna. Hasan, A.M., Abdel-raouf, M.E. International Journal of Environmental Science and Technology, 2024, 119624
70- Tailoring of carboxymethyl guar gum hydrogels via gamma irradiation for remarkable removal of cationic and anionic dyes from simulated solutions. Yousry, R., Sayed, A., Behalo, M.S., Abdel-raouf, M.E., Feteha, A. International Journal of Biological Macromolecules, 2025, 284, 137867
71- Application of guar gum and its derivatives in biomedical field in Encyclopedia of Polymers, Polymeric Materials, and Polymer Technology, Manar El-Sayed Abdel-Raouf, Mohamed Keshawy, Asmaa Sayed, Abdulraheim M.A. Hasan. DOI: 10.1201/9780367694265-EPPMPT14-1.
72- Gamma radiation-assisted synthesis of tea tree oil-based chitosan films for active packaging applications. Asmaa Sayed, Manar El-Sayed Abdel-Raouf, Michail Magdy and Ghada Adel. J Vinyl Addit Technol. 2025;1–17. DOI: 10.1002/vnl.22226.
73- Green Materials Used in Enhanced Oil Recovery: A Historical Background and a Future Outlook. Rasha S. Kamal, Reham I. El-Shazly, Mohamed Keshawy, Abdulraheim M.A. Hasan and Manar E. Abdel-Raouf. In: Recent Approaches in Enhanced Oil Recovery – New Perspectives and Future Outlook, by Intech open. DOI: 10.5772/intechopen.1010666.
74- Environmental impacts for the transportation of crude oil and refined products. Environ Sci Pollut Res Int, 2025 Jun;32(30):17869-17896. doi: 10.1007/s11356-025-36574-2.
75- Gamma Induced Synthesis of pH Responsive Chitosan-Based hydrogel for Real-Time Ammonia Detection in Environmental Monitoring and Food Preservation Application. Egypt. J. Chem. Vol. 68, No. 11 pp. 377-395(2025).
76- Gamma irradiated chitosan HPMC/Ulva lactuca based hydrogel for heavy metal remediation from aqueous solution. International journal of biological macromolecules, 320 (2025) 146130.
77- Gamma Radiation Synthesis and characterization of Poly (vinyl alcohol)/ Arginine/ P (Methacrylic acid-Acrylic acid)/ Zr composite hydrogels for possible biomedical applications. Accepted for publication in Chemistry Select.
78- Chitosan-Al₂O₃ Green Hydrogel Composites: A Sustainable Approach for Cr(VI) Removal from simulated solution" Accepted for publication in BMC chemistry

2025
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2025
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8- The 18th International Conference on Petroleum, Mineral Wealth, and Development, 8-10 February, 2015, EPRI, Cairo, Egypt. (Applications of rosin modified products: Review article)
2025
icon-pin-location Egyptian petroleum research institute
11- International Conference on Advanced Technologies and their applications in agriculture, National Research center, Agriculture and Biological Research Division, 27-29 March 2017. (Guar Gum based nanocomposites for agriculture application)
2025
icon-pin-location national research center
13- International Egyptian Czech Conference on Nanotechnology Applications IECCNA2017, Cairo University conference Hall,10-11 October 2017. (Guar Gum based nanocomposites for agriculture application
2025
icon-pin-location Cairo university