Grazyna Ptak

3.1k total citations
74 papers, 2.2k citations indexed

About

Grazyna Ptak is a scholar working on Public Health, Environmental and Occupational Health, Molecular Biology and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, Grazyna Ptak has authored 74 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 46 papers in Public Health, Environmental and Occupational Health, 45 papers in Molecular Biology and 26 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in Grazyna Ptak's work include Reproductive Biology and Fertility (46 papers), Pluripotent Stem Cells Research (19 papers) and Prenatal Screening and Diagnostics (17 papers). Grazyna Ptak is often cited by papers focused on Reproductive Biology and Fertility (46 papers), Pluripotent Stem Cells Research (19 papers) and Prenatal Screening and Diagnostics (17 papers). Grazyna Ptak collaborates with scholars based in Italy, Poland and Czechia. Grazyna Ptak's co-authors include Pasqualino Loi, P. Cappai, Michael Clinton, Josef Fulka, Barbara Barboni, Federica Zacchini, M. Tischner, Marta Czernik, Jacek A. Modliński and Maria Dattena and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Nature Biotechnology and PLoS ONE.

In The Last Decade

Grazyna Ptak

73 papers receiving 2.1k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Grazyna Ptak Italy 28 1.3k 1.2k 678 486 458 74 2.2k
Pasqualino Loi Italy 31 2.0k 1.5× 1.7k 1.5× 1.0k 1.5× 705 1.5× 510 1.1× 115 3.0k
Raúl Fernández‐González Spain 24 995 0.8× 862 0.7× 485 0.7× 647 1.3× 638 1.4× 68 2.2k
Pablo Bermejo‐Álvarez Spain 30 1.7k 1.3× 1.1k 0.9× 807 1.2× 934 1.9× 677 1.5× 74 2.9k
David Battaglia United States 22 1.7k 1.3× 847 0.7× 358 0.5× 1.4k 2.9× 549 1.2× 44 2.6k
S.K. Walker Australia 22 1.0k 0.8× 549 0.5× 640 0.9× 390 0.8× 584 1.3× 65 1.9k
Monika A. Ward United States 25 552 0.4× 628 0.5× 694 1.0× 609 1.3× 338 0.7× 71 1.7k
Benjamin R. Emery United States 24 1.5k 1.1× 1.2k 1.0× 645 1.0× 1.6k 3.3× 402 0.9× 59 2.8k
Miriam Sutovsky United States 29 911 0.7× 1.0k 0.9× 488 0.7× 1.1k 2.2× 94 0.2× 62 2.1k
Gary R. Hunnicutt United States 15 605 0.5× 706 0.6× 389 0.6× 699 1.4× 115 0.3× 20 1.7k
Ramiro Alberio United Kingdom 29 1.1k 0.9× 1.8k 1.6× 845 1.2× 313 0.6× 193 0.4× 73 2.4k

Countries citing papers authored by Grazyna Ptak

Since Specialization
Citations

This map shows the geographic impact of Grazyna Ptak's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Grazyna Ptak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Grazyna Ptak more than expected).

Fields of papers citing papers by Grazyna Ptak

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Grazyna Ptak. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Grazyna Ptak. The network helps show where Grazyna Ptak may publish in the future.

Co-authorship network of co-authors of Grazyna Ptak

This figure shows the co-authorship network connecting the top 25 collaborators of Grazyna Ptak. A scholar is included among the top collaborators of Grazyna Ptak based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Grazyna Ptak. Grazyna Ptak is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Arena, Roberta, Thomas Haaf, Federica Zacchini, et al.. (2021). Lipid droplets in mammalian eggs are utilized during embryonic diapause. Proceedings of the National Academy of Sciences. 118(10). 52 indexed citations
2.
3.
Czernik, Marta, Paola Toschi, Federica Zacchini, Domenico Iuso, & Grazyna Ptak. (2017). Deregulated Expression of Mitochondrial Proteins Mfn2 and Bcnl3L in Placentae from Sheep Somatic Cell Nuclear Transfer (SCNT) Conceptuses. PLoS ONE. 12(1). e0169579–e0169579. 7 indexed citations
4.
Iuso, Domenico, Marta Czernik, Paola Toschi, et al.. (2015). Exogenous Expression of Human Protamine 1 (hPrm1) Remodels Fibroblast Nuclei into Spermatid-like Structures. Cell Reports. 13(9). 1765–1771. 38 indexed citations
5.
Fidanza, A, Paola Toschi, Federica Zacchini, et al.. (2014). Impaired Placental Vasculogenesis Compromises the Growth of Sheep Embryos Developed In Vitro1. Biology of Reproduction. 91(1). 21–21. 21 indexed citations
6.
Loi, Pasqualino, Joseph Saragusty, & Grazyna Ptak. (2014). Cloning the Mammoth: A Complicated Task or Just a Dream?. Advances in experimental medicine and biology. 753. 489–502. 8 indexed citations
7.
Iuso, Domenico, Marta Czernik, Federica Zacchini, Grazyna Ptak, & Pasqualino Loi. (2013). A Simplified Approach for Oocyte Enucleation in Mammalian Cloning. Cellular Reprogramming. 15(6). 490–494. 20 indexed citations
8.
Loi, Pasqualino, Marta Czernik, Federica Zacchini, et al.. (2013). Sheep: The First Large Animal Model in Nuclear Transfer Research. Cellular Reprogramming. 15(5). 367–373. 4 indexed citations
9.
Fulka, Josef, et al.. (2013). The ups and downs of somatic cell nucleus transfer (SCNT) in humans. Journal of Assisted Reproduction and Genetics. 30(8). 1055–1058. 4 indexed citations
10.
Czernik, Marta, A Fidanza, Cesare Galli, et al.. (2012). Differentiation potential and GFP labeling of sheep bone marrow‐derived mesenchymal stem cells. Journal of Cellular Biochemistry. 114(1). 134–143. 16 indexed citations
11.
Zacchini, Federica, Marta Czernik, Domenico Iuso, et al.. (2011). Efficient Production and Cellular Characterization of Sheep Androgenetic Embryos. Cellular Reprogramming. 13(6). 495–502. 10 indexed citations
12.
Loi, Pasqualino, Jacek A. Modliński, & Grazyna Ptak. (2011). Interspecies somatic cell nuclear transfer: a salvage tool seeking first aid. Theriogenology. 76(2). 217–228. 71 indexed citations
13.
Fulka, Josef, Pasqualino Loi, Grazyna Ptak, J. Fulka, & Justin C. St. John. (2008). Hope for the Mammoth?. Cloning and Stem Cells. 11(1). 1–4. 16 indexed citations
14.
Loi, Pasqualino, Kazutsugu Matsukawa, Grazyna Ptak, et al.. (2008). Freeze-Dried Somatic Cells Direct Embryonic Development after Nuclear Transfer. PLoS ONE. 3(8). e2978–e2978. 73 indexed citations
15.
Matsukawa, Kazutsugu, Margherita Y. Turco, P. A. Scapolo, et al.. (2007). Development of Sheep Androgenetic Embryos Is Boosted following Transfer of Male Pronuclei into Androgenetic Hemizygotes. Cloning and Stem Cells. 9(3). 374–381. 9 indexed citations
16.
Loi, Pasqualino, Michael Clinton, Irena Vacková, et al.. (2005). Placental abnormalities associated with post-natal mortality in sheep somatic cell clones. Theriogenology. 65(6). 1110–1121. 62 indexed citations
17.
Young, Lorraine, Angelika Schnieke, Kenneth J. McCreath, et al.. (2003). Conservation of IGF2-H19 and IGF2R imprinting in sheep: effects of somatic cell nuclear transfer. Mechanisms of Development. 120(12). 1433–1442. 96 indexed citations
18.
Ptak, Grazyna, Michael Clinton, M. Tischner, et al.. (2002). Improving Delivery and Offspring Viability of In Vitro-Produced and Cloned Sheep Embryos1. Biology of Reproduction. 67(6). 1719–1725. 34 indexed citations
19.
Ptak, Grazyna, Michael Clinton, Barbara Barboni, et al.. (2002). Preservation of the Wild European Mouflon: The First Example of Genetic Management Using a Complete Program of Reproductive Biotechnologies. Biology of Reproduction. 66(3). 796–801. 61 indexed citations
20.
Loi, Pasqualino, Grazyna Ptak, Barbara Barboni, et al.. (2001). Genetic rescue of an endangered mammal by cross-species nuclear transfer using post-mortem somatic cells. Nature Biotechnology. 19(10). 962–964. 313 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Pasqualino Loi Breakdown of academic impact, for papers by Raúl Fernández‐González Breakdown of academic impact, for papers by Pablo Bermejo‐Álvarez Breakdown of academic impact, for papers by David Battaglia Breakdown of academic impact, for papers by S.K. Walker Breakdown of academic impact, for papers by Monika A. Ward Breakdown of academic impact, for papers by Benjamin R. Emery Breakdown of academic impact, for papers by Miriam Sutovsky Breakdown of academic impact, for papers by Gary R. Hunnicutt Breakdown of academic impact, for papers by Ramiro Alberio
Rankless by CCL
2026