Nicholas Schramek

1.4k total citations
34 papers, 1.1k citations indexed

About

Nicholas Schramek is a scholar working on Molecular Biology, Clinical Biochemistry and Materials Chemistry. According to data from OpenAlex, Nicholas Schramek has authored 34 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Molecular Biology, 11 papers in Clinical Biochemistry and 11 papers in Materials Chemistry. Recurrent topics in Nicholas Schramek's work include Biochemical and Molecular Research (16 papers), Metabolism and Genetic Disorders (11 papers) and Enzyme Structure and Function (11 papers). Nicholas Schramek is often cited by papers focused on Biochemical and Molecular Research (16 papers), Metabolism and Genetic Disorders (11 papers) and Enzyme Structure and Function (11 papers). Nicholas Schramek collaborates with scholars based in Germany, Ireland and United States. Nicholas Schramek's co-authors include Adelbert Bacher, Wolfgang Eisenreich, Markus Fischer, Andreas Bracher, Felix Rohdich, J. Kaiser, Ilka Haase, Robert Huber, Ferdinand Zepeck and Harald Ritz and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of the American Chemical Society and Journal of Biological Chemistry.

In The Last Decade

Nicholas Schramek

34 papers receiving 1.1k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Nicholas Schramek Germany 21 884 268 149 148 109 34 1.1k
Adam L. VanWert United States 13 243 0.3× 89 0.3× 124 0.8× 49 0.3× 49 0.4× 22 877
Kazuyuki Hiramoto Japan 21 447 0.5× 40 0.1× 86 0.6× 69 0.5× 55 0.5× 54 1.2k
Nahit Gençer Türkiye 20 570 0.6× 34 0.1× 203 1.4× 159 1.1× 17 0.2× 80 1.1k
Sudin Bhattacharya India 26 392 0.4× 121 0.5× 72 0.5× 13 0.1× 63 0.6× 49 1.4k
Sreemanti Das India 19 378 0.4× 160 0.6× 161 1.1× 13 0.1× 14 0.1× 24 1.0k
Walter Jantschko Austria 19 414 0.5× 120 0.4× 78 0.5× 35 0.2× 8 0.1× 22 1.3k
Tetsuo Ishida Japan 14 488 0.6× 117 0.4× 22 0.1× 32 0.2× 13 0.1× 46 833
Shahrzad Tafazoli Canada 14 234 0.3× 70 0.3× 67 0.4× 17 0.1× 20 0.2× 24 759
Hasmik Grigoryan United States 21 468 0.5× 24 0.1× 134 0.9× 42 0.3× 152 1.4× 37 1.1k
Saima Rasheed Pakistan 14 212 0.2× 37 0.1× 80 0.5× 101 0.7× 16 0.1× 47 784

Countries citing papers authored by Nicholas Schramek

Since Specialization
Citations

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

Fields of papers citing papers by Nicholas Schramek

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Nicholas Schramek. 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 Nicholas Schramek. The network helps show where Nicholas Schramek may publish in the future.

Co-authorship network of co-authors of Nicholas Schramek

This figure shows the co-authorship network connecting the top 25 collaborators of Nicholas Schramek. A scholar is included among the top collaborators of Nicholas Schramek 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 Nicholas Schramek. Nicholas Schramek 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.
Hardt, Jochen, et al.. (2015). Determination and quantitation of sildenafil and its major metabolite in the breast milk of a lactating woman. Journal of Pharmaceutical and Biomedical Analysis. 120. 100–105. 14 indexed citations
2.
Schramek, Nicholas, et al.. (2015). Potential metal impurities in active pharmaceutical substances and finished medicinal products – A market surveillance study. European Journal of Pharmaceutical Sciences. 77. 100–105. 37 indexed citations
3.
Schramek, Nicholas, et al.. (2014). Identification of new synthetic PDE-5 inhibitors analogues found as minor components in a dietary supplement. Journal of Pharmaceutical and Biomedical Analysis. 96. 45–53. 26 indexed citations
4.
Schramek, Nicholas, et al.. (2011). Simultaneous determination of alkyl mesilates and alkyl besilates in finished drug products by direct injection GC/MS. European Journal of Pharmaceutical Sciences. 45(1-2). 201–204. 22 indexed citations
5.
Schramek, Nicholas, Huahong Wang, Werner Römisch‐Margl, et al.. (2009). Artemisinin biosynthesis in growing plants of Artemisia annua. A 13CO2 study. Phytochemistry. 71(2-3). 179–187. 111 indexed citations
6.
Lehmann, Martin, Simone Degen, Hans‐Peter Hohmann, et al.. (2009). Biosynthesis of riboflavin. FEBS Journal. 276(15). 4119–4129. 38 indexed citations
7.
Eylert, Eva, et al.. (2007). Biosynthesis of the chromogen hermidin from Mercurialis annua L.. Phytochemistry. 68(22-24). 2816–2824. 13 indexed citations
8.
Römisch‐Margl, Werner, Nicholas Schramek, Tanja Radykewicz, et al.. (2007). 13CO2 as a universal metabolic tracer in isotopologue perturbation experiments. Phytochemistry. 68(16-18). 2273–2289. 39 indexed citations
9.
Illarionov, Boris, Wolfgang Eisenreich, Nicholas Schramek, Adelbert Bacher, & Markus Fischer. (2005). Biosynthesis of Vitamin B2. Journal of Biological Chemistry. 280(31). 28541–28546. 16 indexed citations
10.
Fischer, Markus, Ilka Haase, Richard Feicht, et al.. (2005). Evolution of vitamin B2 biosynthesis: riboflavin synthase of Arabidopsis thaliana and its inhibition by riboflavin. Biological Chemistry. 386(5). 417–28. 23 indexed citations
11.
Laupitz, Ralf, Stefan Hecht, Sabine Amslinger, et al.. (2004). Biochemical characterization of Bacillus subtilis type II isopentenyl diphosphate isomerase, and phylogenetic distribution of isoprenoid biosynthesis pathways. European Journal of Biochemistry. 271(13). 2658–2669. 56 indexed citations
12.
Auerbach, Günter, Gerd Bader, Andreas Bracher, et al.. (2003). Biosynthesis of Pteridines. Reaction Mechanism of GTP Cyclohydrolase I. Journal of Molecular Biology. 326(2). 503–516. 60 indexed citations
13.
Fischer, Markus, Ilka Haase, Klaus Kis, et al.. (2003). Enzyme Catalysis via Control of Activation Entropy: Site-directed Mutagenesis of 6,7-Dimethyl-8-ribityllumazine Synthase. Journal of Molecular Biology. 326(3). 783–793. 36 indexed citations
14.
Haase, Ilka, Markus Fischer, Adelbert Bacher, & Nicholas Schramek. (2003). Temperature-dependent Presteady State Kinetics of Lumazine Synthase from the Hyperthermophilic Eubacterium Aquifex aeolicus. Journal of Biological Chemistry. 278(39). 37909–37915. 14 indexed citations
15.
Illarionov, Boris, Ilka Haase, Adelbert Bacher, Markus Fischer, & Nicholas Schramek. (2003). Presteady State Kinetic Analysis of Riboflavin Synthase. Journal of Biological Chemistry. 278(48). 47700–47706. 17 indexed citations
16.
Kaiser, J., et al.. (2002). Biosynthesis of vitamin B2. European Journal of Biochemistry. 269(21). 5264–5270. 42 indexed citations
17.
Schramek, Nicholas, Andreas Bracher, Markus Fischer, et al.. (2002). Reaction mechanism of GTP cyclohydrolase I: single turnover experiments using a kinetically competent reaction intermediate. Journal of Molecular Biology. 316(3). 829–837. 23 indexed citations
18.
Schramek, Nicholas, Andreas Bracher, & Adelbert Bacher. (2001). Ring Opening Is Not Rate-limiting in the GTP Cyclohydrolase I Reaction. Journal of Biological Chemistry. 276(4). 2622–2626. 12 indexed citations
19.
Ritz, Harald, Nicholas Schramek, Andreas Bracher, et al.. (2001). Biosynthesis of Riboflavin. Journal of Biological Chemistry. 276(25). 22273–22277. 38 indexed citations
20.
Bracher, Andreas, Markus Fischer, Wolfgang Eisenreich, et al.. (1999). Histidine 179 Mutants of GTP Cyclohydrolase I Catalyze the Formation of 2-Amino-5-formylamino-6-ribofuranosylamino-4(3H)-pyrimidinone Triphosphate. Journal of Biological Chemistry. 274(24). 16727–16735. 35 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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