J. A. Sim

1.0k total citations
25 papers, 902 citations indexed

About

J. A. Sim is a scholar working on Cellular and Molecular Neuroscience, Molecular Biology and Cardiology and Cardiovascular Medicine. According to data from OpenAlex, J. A. Sim has authored 25 papers receiving a total of 902 indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Cellular and Molecular Neuroscience, 17 papers in Molecular Biology and 3 papers in Cardiology and Cardiovascular Medicine. Recurrent topics in J. A. Sim's work include Neuroscience and Neuropharmacology Research (17 papers), Ion channel regulation and function (14 papers) and Nicotinic Acetylcholine Receptors Study (5 papers). J. A. Sim is often cited by papers focused on Neuroscience and Neuropharmacology Research (17 papers), Ion channel regulation and function (14 papers) and Nicotinic Acetylcholine Receptors Study (5 papers). J. A. Sim collaborates with scholars based in United Kingdom, Germany and United States. J. A. Sim's co-authors include Andrew Constanti, Toshihiko Momiyama, David A. Brown, William H. Griffith, T.G.J. Allen, J. Robbins, Annmarie Surprenant, Urs Gerber, Dennis A. Brown and A. A. Selyanko and has published in prestigious journals such as Journal of Neuroscience, The Journal of Physiology and Journal of Neurophysiology.

In The Last Decade

J. A. Sim

24 papers receiving 883 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
J. A. Sim United Kingdom 17 590 535 196 168 129 25 902
Thibault Collin France 17 618 1.0× 684 1.3× 47 0.2× 161 1.0× 52 0.4× 37 1.0k
Michelle Mynlieff United States 16 560 0.9× 614 1.1× 40 0.2× 102 0.6× 53 0.4× 28 888
Patrick Meuth Germany 20 665 1.1× 604 1.1× 27 0.1× 255 1.5× 56 0.4× 30 1.1k
Robert D. Pinnock United Kingdom 18 581 1.0× 654 1.2× 55 0.3× 48 0.3× 58 0.4× 22 927
Michael Doengi Germany 12 338 0.6× 270 0.5× 45 0.2× 101 0.6× 34 0.3× 15 610
Marta Pazzagli Italy 15 480 0.8× 328 0.6× 225 1.1× 228 1.4× 27 0.2× 19 870
S. Nishi United States 14 835 1.4× 608 1.1× 27 0.1× 166 1.0× 62 0.5× 16 1.1k
D L Eng United States 10 499 0.8× 478 0.9× 26 0.1× 68 0.4× 45 0.3× 11 755
C Rapisarda Italy 13 388 0.7× 315 0.6× 20 0.1× 158 0.9× 57 0.4× 32 740
Volodymyr Rybalchenko United States 13 227 0.4× 288 0.5× 104 0.5× 162 1.0× 21 0.2× 18 722

Countries citing papers authored by J. A. Sim

Since Specialization
Citations

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

Fields of papers citing papers by J. A. Sim

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. A. Sim. 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 J. A. Sim. The network helps show where J. A. Sim may publish in the future.

Co-authorship network of co-authors of J. A. Sim

This figure shows the co-authorship network connecting the top 25 collaborators of J. A. Sim. A scholar is included among the top collaborators of J. A. Sim 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 J. A. Sim. J. A. Sim 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.
2.
Sim, J. A., et al.. (2025). Anti-Hair Loss Effect of Veratric Acid on Dermal Papilla Cells. International Journal of Molecular Sciences. 26(5). 2240–2240. 4 indexed citations
3.
Grolla, Ambra A., J. A. Sim, Dmitry Lim, et al.. (2013). Amyloid-β and Alzheimer’s disease type pathology differentially affects the calcium signalling toolkit in astrocytes from different brain regions. Cell Death and Disease. 4(5). e623–e623. 83 indexed citations
4.
Barth, Kathrin, Annett Linge, J. A. Sim, et al.. (2010). Increased P2X7R expression in atrial cardiomyocytes of caveolin-1 deficient mice. Histochemistry and Cell Biology. 134(1). 31–38. 16 indexed citations
5.
Sim, J. A., Chul‐Kee Park, Seog Bae Oh, Richard J. Evans, & R. Alan North. (2007). P2X1and P2X4receptor currents in mouse macrophages. British Journal of Pharmacology. 152(8). 1283–1290. 45 indexed citations
6.
Selyanko, A. A., J. A. Sim, & David A. Brown. (1998). Small (SK Ca ) Ca 2+ -activated K + channels in cultured rat hippocampal pyramidal neurones. Pflügers Archiv - European Journal of Physiology. 437(1). 161–163. 9 indexed citations
7.
Selyanko, A. A. & J. A. Sim. (1998). Ca2+‐inhibited non‐inactivating K+ channels in cultured rat hippocampal pyramidal neurones. The Journal of Physiology. 510(1). 71–91. 22 indexed citations
8.
Brändle, U., J. A. Sim, Annmarie Surprenant, et al.. (1997). Desensitization of the P2X2 receptor controlled by alternative splicing. FEBS Letters. 404(2-3). 294–298. 144 indexed citations
9.
Momiyama, Toshihiko, J. A. Sim, & Dennis A. Brown. (1996). Dopamine D1‐like receptor‐mediated presynaptic inhibition of excitatory transmission onto rat magnocellular basal forebrain neurones.. The Journal of Physiology. 495(1). 97–106. 49 indexed citations
10.
Sim, J. A. & William H. Griffith. (1996). Muscarinic Inhibition of Glutamatergic Transmission onto Rat Magnocellular Basal Forebrain Neurons in a Thin‐slice Preparation. European Journal of Neuroscience. 8(5). 880–891. 38 indexed citations
11.
Momiyama, Toshihiko & J. A. Sim. (1996). Modulation of Inhibitory Transmission by Dopamine in Rat Basal Forebrain Nuclei: Activation of Presynaptic D1-like Dopaminergic Receptors. Journal of Neuroscience. 16(23). 7505–7512. 43 indexed citations
12.
Alger, Bradley E., J. A. Sim, & David A. Brown. (1994). Single-channel activity correlated with medium-duration, Ca-dependent K current in cultured rat hippocampal neurones. Neuroscience Letters. 168(1-2). 23–28. 20 indexed citations
13.
Allen, T.G.J., J. A. Sim, & David A. Brown. (1993). The whole‐cell calcium current in acutely dissociated magnocellular cholinergic basal forebrain neurones of the rat.. The Journal of Physiology. 460(1). 91–116. 57 indexed citations
14.
Gerber, Urs, J. A. Sim, & B.H. Gähwiler. (1992). Reduction of Potassium Conductances Mediated by Metabotropic Glutamate Receptors in Rat CA3 Pyramidal Cells Does Not Require Protein Kinase C or Protein Kinase A. European Journal of Neuroscience. 4(9). 792–797. 35 indexed citations
15.
Sim, J. A., Urs Gerber, Thomas Knöpfel, & David A. Brown. (1992). Evidence Against a Role for Protein Kinase C in the Inhibition of the Calcium‐activated Potassium Current IAHP by Muscarinic Stimulants in Rat Hippocampal Neurons. European Journal of Neuroscience. 4(9). 785–791. 19 indexed citations
16.
17.
Sim, J. A. & Enrico Cherubini. (1990). Submicromolar concentrations of zinc irreversibly reduce a calcium-dependent potassium current in rat hippocampal neurons in vitro. Neuroscience. 36(3). 623–629. 25 indexed citations
18.
Griffith, William H. & J. A. Sim. (1990). Comparison of 4-aminopyridine and tetrahydroaminoacridine on basal forebrain neurons.. Journal of Pharmacology and Experimental Therapeutics. 255(3). 986–993. 18 indexed citations
19.
Robbins, J. & J. A. Sim. (1990). A transient outward current in NG108-15 neuroblastoma � glioma hybrid cells. Pflügers Archiv - European Journal of Physiology. 416(1-2). 130–137. 34 indexed citations
20.
Constanti, Andrew, M. Galvan, Peter Franz, & J. A. Sim. (1985). Calcium-dependent inward currents in voltage-clamped guinea-pig olfactory cortex neurones. Pflügers Archiv - European Journal of Physiology. 404(3). 259–265. 17 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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