Larry S. Helmick

542 total citations
31 papers, 393 citations indexed

About

Larry S. Helmick is a scholar working on Organic Chemistry, Mechanics of Materials and Mechanical Engineering. According to data from OpenAlex, Larry S. Helmick has authored 31 papers receiving a total of 393 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Organic Chemistry, 10 papers in Mechanics of Materials and 9 papers in Mechanical Engineering. Recurrent topics in Larry S. Helmick's work include Tribology and Wear Analysis (8 papers), Lubricants and Their Additives (7 papers) and Chemical Reaction Mechanisms (6 papers). Larry S. Helmick is often cited by papers focused on Tribology and Wear Analysis (8 papers), Lubricants and Their Additives (7 papers) and Chemical Reaction Mechanisms (6 papers). Larry S. Helmick collaborates with scholars based in United States and Japan. Larry S. Helmick's co-authors include John A. Zoltewicz, William W. Paudler, William Jones, Masabumi Masuko, Shashi Kant Sharma, Peter Beak, James E. Kuder, Carl E. Snyder, Lois J. Gschwender and David B. Reitz and has published in prestigious journals such as Journal of the American Chemical Society, The Journal of Organic Chemistry and Tribology Letters.

In The Last Decade

Larry S. Helmick

29 papers receiving 360 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Larry S. Helmick United States 14 236 106 80 45 36 31 393
Todd L. Kurth United States 12 137 0.6× 36 0.3× 62 0.8× 56 1.2× 95 2.6× 22 364
Louis R. Grant United States 7 110 0.5× 132 1.2× 17 0.2× 19 0.4× 112 3.1× 9 295
N. V. Schwartz Canada 10 252 1.1× 29 0.3× 24 0.3× 30 0.7× 106 2.9× 14 406
Charles O. Parker United States 11 191 0.8× 57 0.5× 11 0.1× 33 0.7× 47 1.3× 15 270
Hideo Ueda Japan 9 137 0.6× 148 1.4× 120 1.5× 31 0.7× 79 2.2× 20 368
Milton B. Frankel United States 10 228 1.0× 223 2.1× 19 0.2× 58 1.3× 174 4.8× 41 481
Godson C. Nwokogu United States 9 256 1.1× 7 0.1× 38 0.5× 32 0.7× 39 1.1× 13 300
É. N. Deryagina Russia 9 229 1.0× 23 0.2× 20 0.3× 16 0.4× 69 1.9× 62 342
Rolf Pütter Germany 13 447 1.9× 12 0.1× 96 1.2× 61 1.4× 48 1.3× 24 583
M. Dotrong United States 11 139 0.6× 7 0.1× 35 0.4× 21 0.5× 39 1.1× 22 253

Countries citing papers authored by Larry S. Helmick

Since Specialization
Citations

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

Fields of papers citing papers by Larry S. Helmick

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Larry S. Helmick. 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 Larry S. Helmick. The network helps show where Larry S. Helmick may publish in the future.

Co-authorship network of co-authors of Larry S. Helmick

This figure shows the co-authorship network connecting the top 25 collaborators of Larry S. Helmick. A scholar is included among the top collaborators of Larry S. Helmick 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 Larry S. Helmick. Larry S. Helmick 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.
Trivedi, Hitesh K., Costandy S. Saba, & Larry S. Helmick. (1999). Effects of linear PFPAE decomposition products on the rolling contact fatigue performance of M50. Tribology Letters. 7(1). 17–25. 3 indexed citations
2.
Helmick, Larry S. & Shashi Kant Sharma. (1999). Effect of humidity on wear of M-50 steel with a branched perfluoropolyalkylether lubricant. Tribology Letters. 6(2). 123–127. 7 indexed citations
3.
Gschwender, Lois J., et al.. (1998). The Effect of Additives on the Wear Behavior of Bearing Steels with RfO(CFfO)x(CF2CF2O)y(CF2CF2CF2O)zRfPerfluoropolyalkylether Fluids. Tribology Transactions. 41(1). 78–86. 8 indexed citations
4.
Helmick, Larry S., et al.. (1997). The Effect of Humidity on the Wear Behavior of Bearing Steels with RfO(n-C3F6O)xRfPerfluoropolyalkylether Fluids and Formulations©. Tribology Transactions. 40(3). 393–402. 13 indexed citations
5.
Helmick, Larry S.. (1996). Effect of Humidity on Friction and Wear for a Linear Perfluoropolyalkylether Fluid Under Boundary Lubrication Conditions. DigitalCommons-Cedarville (Cedarville University). 52(6). 437–442. 11 indexed citations
6.
Helmick, Larry S., et al.. (1996). Tribochemistry of a PFPAE Fluid on M-50 Surfaces by FTIR Spectroscopy. Tribology Transactions. 39(3). 705–709. 17 indexed citations
7.
Masuko, Masabumi, et al.. (1993). A Vacuum Four-Ball Tribometer to Evaluate Liquid Lubricants for Space Applications. DigitalCommons-Cedarville (Cedarville University). 50(11). 871–875. 20 indexed citations
8.
Masuko, Masabumi, et al.. (1993). Tribological characteristics of perfluoropolyether liquid lubricants under sliding conditions in high vacuum. NASA Technical Reports Server (NASA). 3 indexed citations
9.
Helmick, Larry S. & William Jones. (1992). Determination of the Oxidative Stability of Perfluoropolyalkyl Ethers and Correlation with Chemical Structure. DigitalCommons-Cedarville (Cedarville University). 50(8). 649–655. 3 indexed citations
10.
Helmick, Larry S. & William Jones. (1990). Determination of the Thermal Stability of Perfluoroalkylethers. DigitalCommons-Cedarville (Cedarville University). 427–432. 12 indexed citations
11.
Helmick, Larry S.. (1989). A Demonstration of the Mixing Model to Account for Rb-Sr Isochrons. DigitalCommons-Cedarville (Cedarville University). 26. 20–23. 1 indexed citations
12.
Helmick, Larry S. & William Jones. (1989). Determination of the thermal stability of perfluoroalkylethers by tensimetry: Instrumentation and Procedure. DigitalCommons-Cedarville (Cedarville University). 3 indexed citations
13.
Reitz, David B., et al.. (1978). Dipole-stabilized carbanions from thioesters. Evidence for stabilization by the carbonyl group. Journal of the American Chemical Society. 100(17). 5428–5436. 16 indexed citations
14.
Zoltewicz, John A. & Larry S. Helmick. (1978). Model studies of thiamin catalysis. Steric inhibition of deprotonation of a hydroxyethyl side chain. The Journal of Organic Chemistry. 43(9). 1718–1721. 3 indexed citations
15.
Zoltewicz, John A., et al.. (1976). Competitive addition of carbon, sulfur and nitrogen nucleophiles to quaternized heteroaromatic compounds in liquid ammonia. The Journal of Organic Chemistry. 41(8). 1308–1313. 14 indexed citations
16.
Zoltewicz, John A., et al.. (1976). Covalent amination. Substituent effects on the site of addition of ammonia to quaternized pyridines and pyrazines. The Journal of Organic Chemistry. 41(8). 1303–1308. 20 indexed citations
17.
Zoltewicz, John A. & Larry S. Helmick. (1973). Ionization in liquid ammonia of methyl and amino groups bonded to pyridine and pyrazine. Method of determining their pKa values. The Journal of Organic Chemistry. 38(4). 658–662. 27 indexed citations
18.
Paudler, William W. & Larry S. Helmick. (1968). Acid- and base-catalyzed deuterium-protium exchange of some polyazaindenes. The Journal of Organic Chemistry. 33(3). 1087–1089. 12 indexed citations
19.
Paudler, William W., James E. Kuder, & Larry S. Helmick. (1968). Mass spectra of some di- and triazaindenes. The Journal of Organic Chemistry. 33(4). 1379–1383. 13 indexed citations
20.
Paudler, William W. & Larry S. Helmick. (1968). Position of protonation and of N‐methylation in the s‐triazolo[1,5‐a] pyrirnidine ring system. Journal of Heterocyclic Chemistry. 5(5). 691–693. 8 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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