Robert H. Sik

1.8k total citations
43 papers, 1.6k citations indexed

About

Robert H. Sik is a scholar working on Physical and Theoretical Chemistry, Organic Chemistry and Molecular Biology. According to data from OpenAlex, Robert H. Sik has authored 43 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Physical and Theoretical Chemistry, 13 papers in Organic Chemistry and 12 papers in Molecular Biology. Recurrent topics in Robert H. Sik's work include Photochemistry and Electron Transfer Studies (13 papers), Free Radicals and Antioxidants (9 papers) and Photodynamic Therapy Research Studies (9 papers). Robert H. Sik is often cited by papers focused on Photochemistry and Electron Transfer Studies (13 papers), Free Radicals and Antioxidants (9 papers) and Photodynamic Therapy Research Studies (9 papers). Robert H. Sik collaborates with scholars based in United States, South Korea and Australia. Robert H. Sik's co-authors include Colin F. Chignell, Ann G. Motten, Krzysztof J. Reszka, Lydia J. Martínez, Thomas Dahl, Piotr Bilski, Ronald P. Mason, B. Kalyanaraman, Birandra K. Sinha and Sang Kuk Han and has published in prestigious journals such as Environmental Science & Technology, Free Radical Biology and Medicine and Journal of Medicinal Chemistry.

In The Last Decade

Robert H. Sik

43 papers receiving 1.5k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Robert H. Sik United States 20 486 360 256 218 207 43 1.6k
Ann G. Motten United States 20 374 0.8× 336 0.9× 171 0.7× 239 1.1× 189 0.9× 40 1.3k
Francisco Boscá Spain 29 670 1.4× 758 2.1× 483 1.9× 611 2.8× 44 0.2× 113 2.6k
Alexis Aspée Chile 22 399 0.8× 410 1.1× 125 0.5× 281 1.3× 24 0.1× 67 1.3k
René Santús France 30 878 1.8× 427 1.2× 463 1.8× 308 1.4× 11 0.1× 106 2.4k
Suppiah Navaratnam United Kingdom 20 258 0.5× 490 1.4× 123 0.5× 365 1.7× 14 0.1× 52 1.4k
Virginie Lhiaubet‐Vallet Spain 23 838 1.7× 533 1.5× 404 1.6× 578 2.7× 18 0.1× 86 2.1k
Ryusei Konaka Japan 19 264 0.5× 393 1.1× 44 0.2× 268 1.2× 26 0.1× 43 1.4k
A. Sułkowska Poland 25 1.9k 4.0× 495 1.4× 92 0.4× 394 1.8× 28 0.1× 98 2.7k
Shohreh Nafisi Iran 24 855 1.8× 467 1.3× 37 0.1× 340 1.6× 68 0.3× 49 1.8k
Germán Günther Chile 18 381 0.8× 365 1.0× 156 0.6× 305 1.4× 24 0.1× 82 1.2k

Countries citing papers authored by Robert H. Sik

Since Specialization
Citations

This map shows the geographic impact of Robert H. Sik'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 Robert H. Sik with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Robert H. Sik more than expected).

Fields of papers citing papers by Robert H. Sik

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Robert H. Sik. 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 Robert H. Sik. The network helps show where Robert H. Sik may publish in the future.

Co-authorship network of co-authors of Robert H. Sik

This figure shows the co-authorship network connecting the top 25 collaborators of Robert H. Sik. A scholar is included among the top collaborators of Robert H. Sik 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 Robert H. Sik. Robert H. Sik 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.
Han, Sang‐Kuk, Robert H. Sik, Ann G. Motten, Colin F. Chignell, & Piotr Bilski. (2009). Photosensitized Oxidation of Tetrabromobisphenol A by Humic Acid in Aqueous Solution†. Photochemistry and Photobiology. 85(6). 1299–1305. 32 indexed citations
2.
Ehrenshaft, Marilyn, Sueli de Oliveira Silva, Irina Perdivara, et al.. (2009). Immunological detection of N-formylkynurenine in oxidized proteins. Free Radical Biology and Medicine. 46(9). 1260–1266. 50 indexed citations
3.
Chignell, Colin F., Robert H. Sik, & Piotr Bilski. (2008). The Photosensitizing Potential of Compact Fluorescent vs Incandescent Light Bulbs. Photochemistry and Photobiology. 84(5). 1291–1293. 11 indexed citations
4.
Chignell, Colin F., et al.. (2008). EPR studies of in vivo radical production by 3,3′,5,5′-tetrabromobisphenol A (TBBPA) in the Sprague–Dawley rat. Toxicology and Applied Pharmacology. 230(1). 17–22. 31 indexed citations
5.
Chignell, Colin F., Robert H. Sik, Mary Ann Watson, & Albert R. Wielgus. (2007). Photochemistry and Photocytotoxicity of Alkaloids from Goldenseal (Hydrastis canadensis L.) 3: Effect on Human Lens and Retinal Pigment Epithelial Cells. Photochemistry and Photobiology. 83(4). 938–943. 17 indexed citations
6.
Chignell, Colin F., et al.. (2006). Ultraviolet A sensitivity in Smith–Lemli–Opitz syndrome: Possible involvement of cholesta-5,7,9(11)-trien-3β-ol. Free Radical Biology and Medicine. 41(2). 339–346. 26 indexed citations
7.
Reszka, Krzysztof J., M. Takayama, Robert H. Sik, Colin F. Chignell, & Isao Saito. (2005). Photochemistry of Naphthalene Diimides: EPR Study of Free Radical Formation via Photoredox Process¶. Photochemistry and Photobiology. 81(3). 573–573. 11 indexed citations
8.
He, Yu‐Ying, Jian-Li Huang, Robert H. Sik, et al.. (2004). Expression Profiling of Human Keratinocyte Response to Ultraviolet A: Implications in Apoptosis. Journal of Investigative Dermatology. 122(2). 533–543. 32 indexed citations
9.
Chignell, Colin F. & Robert H. Sik. (1998). The Effect of Static Magnetic Fields on the Photohemolysis of Human Erythrocytes by Ketoprofen. Photochemistry and Photobiology. 67(5). 591–591. 2 indexed citations
10.
Martínez, Lydia J., Robert H. Sik, & Colin F. Chignell. (1998). Fluoroquinolone Antimicrobials: Singlet Oxygen, Superoxide and Phototoxicity. Photochemistry and Photobiology. 67(4). 399–399. 14 indexed citations
11.
Chignell, Colin F. & Robert H. Sik. (1998). The Effect of Static Magnetic Fields on the Photohemolysis of Human Erythrocytes by Ketoprofen. Photochemistry and Photobiology. 67(5). 591–595. 2 indexed citations
12.
Chignell, Colin F. & Robert H. Sik. (1995). MAGNETIC FIELD EFFECTS ON THE PHOTOHEMOLYSIS OF HUMAN ERYTHROCYTES BY KETOPROFEN AND PROTOPORPHYRIN IX. Photochemistry and Photobiology. 62(1). 205–207. 23 indexed citations
13.
Chignell, Colin F., et al.. (1994). SPECTRAL AND PHOTOCHEMICAL PROPERTIES OF CURCUMIN. Photochemistry and Photobiology. 59(3). 295–302. 365 indexed citations
14.
Moore, Douglas E., Robert H. Sik, Piotr Bilski, Colin F. Chignell, & Krzysztof J. Reszka. (1994). PHOTOCHEMICAL SENSITIZATION BY AZATHIOPRINE AND ITS METABOLITES. PART 3. A DIRECT EPR AND SPIN‐TRAPPING STUDY OF LIGHT‐INDUCED FREE RADICALS FROM 6‐MERCAPTOPURINE AND ITS OXIDATION PRODUCTS. Photochemistry and Photobiology. 60(6). 574–581. 19 indexed citations
15.
Motten, Ann G., Robert H. Sik, Colin F. Chignell, & Patrick Hayden. (1994). An EPR Study of Free Radicals Formed by Antipsoriatic and Tumor-Promoting 9-Anthrones in Nonpolar Solvents. Chemical Research in Toxicology. 7(6). 877–881. 6 indexed citations
16.
Reszka, Krzysztof J., Piotr Bilski, Robert H. Sik, & Colin F. Chignell. (1993). Photosensitized Generation of Superoxide Radical in Aprotic Solvents: an EPR and Spin Trapping Study. Free Radical Research Communications. 19(sup1). s33–s44. 23 indexed citations
17.
Sik, Robert H., et al.. (1993). SPECTROSCOPIC STUDIES OF CUTANEOUS PHOTOSENSITIZING AGENTS. XVIII. INDOMETHACIN. Photochemistry and Photobiology. 58(3). 367–373. 13 indexed citations
18.
Dabestani, Reza, Krzysztof J. Reszka, Donald G. Davis, Robert H. Sik, & Colin F. Chignell. (1991). SPECTROSCOPIC STUDIES OF CUTANEOUS PHOTOSENSITIZING AGENTS–XVI. ISPERSE BLUE 35. Photochemistry and Photobiology. 54(1). 37–42. 4 indexed citations
19.
Hall, Robert D., et al.. (1990). SPECTROSCOPIC STUDIES OF CUTANEOUS PHOTOSENSITIZING AGENTS–XV. ANTHRALIN and ITS OXIDATION PRODUCT 1,8‐DIHYDROXYANTHRAQUINONE. Photochemistry and Photobiology. 52(5). 961–971. 30 indexed citations
20.
Sik, Robert H., et al.. (1979). A Nuclear Magnetic Resonance Study of Compound 48/80. Molecular Pharmacology. 15(1). 179–188. 7 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.

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