Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,864 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :1
Mohamed Motaleb
Radiochemistry
Organic synthesis
Radiolabelling
Biological evaluation
Metrics
H-Index
i10 Index
Citation
27
61
2,038
* Rankings
Ranking Based On Selection :2
Mostafa M. Hamed
Analytical Chemistry
Environmental Chemistry
Nuclear Chemistry
Metrics
H-Index
i10 Index
Citation
26
38
1,815
* Rankings
Ranking Based On Selection :3
Amr El-Hag Ali
Polymer
Radiation
Biomaterials
Nanocomposites
Metrics
H-Index
i10 Index
Citation
25
48
2,056
* Rankings
Ranking Based On Selection :5
Jacqueline A. Daoud
Chemistry
hydrometallurgy
Chemical engineering
environmental science
Metrics
H-Index
i10 Index
Citation
23
42
1,849
* Rankings
Ranking Based On Selection :6
Ya El-Nadi
Inorganic Chemistry
Separation
Solvent Extraction
Metallurgy
Metrics
H-Index
i10 Index
Citation
20
29
1,451
* Rankings
Ranking Based On Selection :9
Ramy Amer Fahim
Radiation Dosimetry
Radiation Chemistry
Physical Chemistry
ESR Spectroscopy
ESR Dating
Metrics
H-Index
i10 Index
Citation
18
22
1,480
* Rankings
Ranking Based On Selection :10
Ahmed Elbarbary Mansour
Radiation Research of Polymer Chemistry (Hydrogels
nanocomposites)
Metrics
H-Index
i10 Index
Citation
18
28
1,203
* Rankings
Ranking Based On Selection :11
Em El Afifi
Radioanalytical chemistry . Inorganic chemistry . Environmental radioactivity
Metrics
H-Index
i10 Index
Citation
17
25
948
* Rankings
Ranking Based On Selection :12
Abdel-Aziz,Mm
Radiation Chemistry
Polymers
Rubber. composites
Metrics
H-Index
i10 Index
Citation
17
22
829
* Rankings
Ranking Based On Selection :15
Yasser Gad
Radiation Research of Polymer Chemistry (Hydrogels
nanocomposites
Recycling))
Metrics
H-Index
i10 Index
Citation
15
18
840
* Rankings
Ranking Based On Selection :17
Ebaa M. El-Hossary
Medicinal Chemistry
Radiation Chemistry
Radiopharmaceuticals
Metrics
H-Index
i10 Index
Citation
14
15
753
* Rankings
Ranking Based On Selection :18
Salah Lotfy Ahmed Khalil
Shape memory polymers. Radiation processing of naturally polymers
Metrics
H-Index
i10 Index
Citation
14
14
1,025
* Rankings
Ranking Based On Selection :24
Muhammad S. Mansy
Nuclear Physics
Radioactvity measurements
Radioactive Waste
Gamma Spectroscopy
Shielding
Metrics
H-Index
i10 Index
Citation
10
10
277
Ashraf Arafat
analytical chemistry environmental chemistry sorptionnatural radioactivity
Metrics
H-Index
i10 Index
Citation
5
3
118
Mostafa I. Qassim
Radiation chemistry and Polymers
Nuclear chemistry
Metrics
H-Index
i10 Index
Citation
2
2
34
Rankings
Ranking Based On Selection: 1
Mohamed Motaleb
Metrics
H-Index
i10 Index
Citation Counts
27
61
2,038
Radiochemistry
Organic synthesis
Radiolabelling
Biological evaluation
Rankings
Ranking Based On Selection: 2
Mostafa M. Hamed
Metrics
H-Index
i10 Index
Citation Counts
26
38
1,815
Analytical Chemistry
Environmental Chemistry
Nuclear Chemistry
Rankings
Ranking Based On Selection: 3
Amr El-Hag Ali
Metrics
H-Index
i10 Index
Citation Counts
25
48
2,056
Polymer
Radiation
Biomaterials
Nanocomposites
Rankings
Ranking Based On Selection: 4
Ss Metwally
Metrics
H-Index
i10 Index
Citation Counts
23
28
1,275
Rankings
Ranking Based On Selection: 5
Jacqueline A. Daoud
Metrics
H-Index
i10 Index
Citation Counts
23
42
1,849
Chemistry
hydrometallurgy
Chemical engineering
environmental science
Rankings
Ranking Based On Selection: 6
Ya El-Nadi
Metrics
H-Index
i10 Index
Citation Counts
20
29
1,451
Inorganic Chemistry
Separation
Solvent Extraction
Metallurgy
Rankings
Ranking Based On Selection: 7
Atef A. Abdel-Fattah
Metrics
H-Index
i10 Index
Citation Counts
20
43
1,160
Rankings
Ranking Based On Selection: 8
Marwa El-Gazzar
Metrics
H-Index
i10 Index
Citation Counts
19
26
893
Rankings
Ranking Based On Selection: 9
Ramy Amer Fahim
Metrics
H-Index
i10 Index
Citation Counts
18
22
1,480
Radiation Dosimetry
Radiation Chemistry
Physical Chemistry
ESR Spectroscopy
ESR Dating
Rankings
Ranking Based On Selection: 10
Ahmed Elbarbary Mansour
Metrics
H-Index
i10 Index
Citation Counts
18
28
1,203
Radiation Research of Polymer Chemistry (Hydrogels
nanocomposites)
Rankings
Ranking Based On Selection: 11
Em El Afifi
Metrics
H-Index
i10 Index
Citation Counts
17
25
948
Radioanalytical chemistry . Inorganic chemistry . Environmental radioactivity
Rankings
Ranking Based On Selection: 12
Abdel-Aziz,Mm
Metrics
H-Index
i10 Index
Citation Counts
17
22
829
Radiation Chemistry
Polymers
Rubber. composites
Rankings
Ranking Based On Selection: 13
Hussein E. Ali
Metrics
H-Index
i10 Index
Citation Counts
16
23
628
Rankings
Ranking Based On Selection: 14
MA Youssef
Metrics
H-Index
i10 Index
Citation Counts
16
18
702
Rankings
Ranking Based On Selection: 15
Yasser Gad
Metrics
H-Index
i10 Index
Citation Counts
15
18
840
Radiation Research of Polymer Chemistry (Hydrogels
nanocomposites
Recycling))
Rankings
Ranking Based On Selection: 16
Amany Raafat
Metrics
H-Index
i10 Index
Citation Counts
14
20
773
Rankings
Ranking Based On Selection: 17
Ebaa M. El-Hossary
Metrics
H-Index
i10 Index
Citation Counts
14
15
753
Medicinal Chemistry
Radiation Chemistry
Radiopharmaceuticals
Rankings
Ranking Based On Selection: 18
Salah Lotfy Ahmed Khalil
Metrics
H-Index
i10 Index
Citation Counts
14
14
1,025
Shape memory polymers. Radiation processing of naturally polymers
Rankings
Ranking Based On Selection: 19
Ahmed Shahr El-din
Metrics
H-Index
i10 Index
Citation Counts
13
15
423
Rankings
Ranking Based On Selection: 20
Asmaa Sayed
Metrics
H-Index
i10 Index
Citation Counts
11
11
292
Rankings
Ranking Based On Selection: 21
ehab khozemy
Metrics
H-Index
i10 Index
Citation Counts
11
12
301
Rankings
Ranking Based On Selection: 22
Shaimaa Nasef
Metrics
H-Index
i10 Index
Citation Counts
10
11
300
Rankings
Ranking Based On Selection: 23
MA Elhady
Metrics
H-Index
i10 Index
Citation Counts
10
10
311
Rankings
Ranking Based On Selection: 24
Muhammad S. Mansy
Metrics
H-Index
i10 Index
Citation Counts
10
10
277
Nuclear Physics
Radioactvity measurements
Radioactive Waste
Gamma Spectroscopy
Shielding
Rankings
Ranking Based On Selection: 25
Mohamed ME Breky
Metrics
H-Index
i10 Index
Citation Counts
8
8
227
Rankings
Ranking Based On Selection: 26
Walid M Ghorab
Metrics
H-Index
i10 Index
Citation Counts
5
5
130
Rankings
Ranking Based On Selection: 27
Ashraf Arafat
Metrics
H-Index
i10 Index
Citation Counts
5
3
118
analytical chemistry environmental chemistry sorptionnatural radioactivity
Rankings
Ranking Based On Selection: 28
Amr Emara
Metrics
H-Index
i10 Index
Citation Counts
4
2
49
Polymer
Organic Chemistry
Nuclear Chemistry
Rankings
Ranking Based On Selection: 29
Mostafa I. Qassim
Metrics
H-Index
i10 Index
Citation Counts
2
2
34
Radiation chemistry and Polymers
Nuclear chemistry
Rankings
Ranking Based On Selection: 30
Ahmed Elsenbawy
Metrics
H-Index
i10 Index
Citation Counts
2
1
18