Harold Zappe

545 total citations
19 papers, 439 citations indexed

About

Harold Zappe is a scholar working on Molecular Biology, Infectious Diseases and Epidemiology. According to data from OpenAlex, Harold Zappe has authored 19 papers receiving a total of 439 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Molecular Biology, 9 papers in Infectious Diseases and 5 papers in Epidemiology. Recurrent topics in Harold Zappe's work include Tuberculosis Research and Epidemiology (7 papers), Mycobacterium research and diagnosis (5 papers) and Bacterial Genetics and Biotechnology (5 papers). Harold Zappe is often cited by papers focused on Tuberculosis Research and Epidemiology (7 papers), Mycobacterium research and diagnosis (5 papers) and Bacterial Genetics and Biotechnology (5 papers). Harold Zappe collaborates with scholars based in South Africa, United States and Austria. Harold Zappe's co-authors include David Woods, Lafras M. Steyn, W. A. Jones, David T. Jones, D. R. Woods, David Jones, M.J. Bossard, Long‐Liu Lin, Jennifer A. Thomson and Nicola Mulder and has published in prestigious journals such as Nucleic Acids Research, Applied and Environmental Microbiology and Advanced Drug Delivery Reviews.

In The Last Decade

Harold Zappe

19 papers receiving 422 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Harold Zappe South Africa 12 227 130 120 119 103 19 439
Hugh A. George United States 9 357 1.6× 134 1.0× 73 0.6× 66 0.6× 217 2.1× 15 707
Tomomitsu Sewaki Japan 9 241 1.1× 62 0.5× 115 1.0× 98 0.8× 122 1.2× 14 489
Michael J. Fiske United States 13 282 1.2× 37 0.3× 65 0.5× 34 0.3× 84 0.8× 14 470
Jyoti K. Jha United States 13 443 2.0× 38 0.3× 58 0.5× 102 0.9× 56 0.5× 21 701
Mintao Zhong China 9 163 0.7× 74 0.6× 96 0.8× 37 0.3× 38 0.4× 11 375
Linda Kox Netherlands 6 195 0.9× 35 0.3× 27 0.2× 75 0.6× 48 0.5× 7 536
Susanne Götker Germany 13 490 2.2× 130 1.0× 37 0.3× 45 0.4× 73 0.7× 13 674
Lili R. Mesak Canada 11 209 0.9× 37 0.3× 88 0.7× 97 0.8× 25 0.2× 14 418
Galia Zaide Israel 11 268 1.2× 210 1.6× 248 2.1× 49 0.4× 13 0.1× 20 491
José María Viader-Salvadó Mexico 13 198 0.9× 38 0.3× 70 0.6× 97 0.8× 75 0.7× 37 399

Countries citing papers authored by Harold Zappe

Since Specialization
Citations

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

Fields of papers citing papers by Harold Zappe

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Harold Zappe

This figure shows the co-authorship network connecting the top 25 collaborators of Harold Zappe. A scholar is included among the top collaborators of Harold Zappe 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 Harold Zappe. Harold Zappe is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

19 of 19 papers shown
1.
Seyfried, Birgit, Jürgen Siekmann, Peter L. Turecek, et al.. (2010). PEGylated recombinant von Willebrand factor analyzed by means of MALDI-TOF-MS, CGE-on-a-chip and nES-GEMMA. International Journal of Mass Spectrometry. 305(2-3). 157–163. 5 indexed citations
2.
Zappe, Harold, et al.. (2007). PEGylation of cyanovirin–N, an entry inhibitor of HIV. Advanced Drug Delivery Reviews. 60(1). 79–87. 41 indexed citations
3.
Matsheka, Maitshwarelo, Albert J. Lastovica, Harold Zappe, & B. Gay Elisha. (2006). The use of (GTG)5 oligonucleotide as an RAPD primer to type Campylobacter concisus. Letters in Applied Microbiology. 0(0). 1848062278–1848062278. 16 indexed citations
4.
5.
Mulder, Nicola, et al.. (1999). The Mycobacterium tuberculosis mysB gene product is a functional equivalent of the Escherichia coli sigma factor, KatF. Gene. 240(2). 361–370. 6 indexed citations
6.
Mulder, Nicola, Harold Zappe, & Lafras M. Steyn. (1999). Characterization of a Mycobacterium tuberculosis homologue of the Streptomyces coelicolor whiB gene. Tubercle and Lung Disease. 79(5). 299–308. 11 indexed citations
7.
8.
Zappe, Harold, et al.. (1999). The Mycobacterium tuberculosis katG promoter region contains a novel upstream activator. Microbiology. 145(9). 2507–2518. 15 indexed citations
9.
Zappe, Harold, et al.. (1997). Mycobacterial promoters. Tubercle and Lung Disease. 78(5-6). 211–223. 56 indexed citations
10.
Vosloo, Wilna, et al.. (1997). Characterisation of a lipoprotein in Mycobacterium bovis (BCG) with sequence similarity to the secreted protein MPB70. Gene. 188(1). 123–128. 26 indexed citations
11.
Barlow, Denise P., et al.. (1995). 16S rRNA sequence analysis of an isolate of Mycobacterium haemophilum from a heart transplant patient. Journal of Medical Microbiology. 43(3). 189–191. 14 indexed citations
12.
Abratt, Valerie R., Harold Zappe, & David Woods. (1993). A reporter gene vector to investigate the regulation of glutamine synthetase in Bacteroides fragilis Bf1. Journal of General Microbiology. 139(1). 59–65. 7 indexed citations
13.
Zappe, Harold, Gregory L. Blatch, & D. R. Woods. (1992). Expression of Bacillus amyloliquefaciens amylase and Vibrio alginolyticus protease A fusion genes. Journal of General Microbiology. 138(2). 319–327. 1 indexed citations
14.
Zappe, Harold, W. A. Jones, & David Woods. (1990). Nucleotide sequence of aClostridium acetobutylicumP262 xylanase gene (xynB). Nucleic Acids Research. 18(8). 2179–2179. 34 indexed citations
15.
Lin, Long‐Liu, et al.. (1990). Cloning, sequencing and analysis of expression of a Butyrivibrio fibrisolvens gene encoding a  -glucosidase. Journal of General Microbiology. 136(8). 1567–1576. 41 indexed citations
16.
Zappe, Harold, W. A. Jones, David Jones, & David Woods. (1988). Structure of an endo-beta-1,4-glucanase gene from Clostridium acetobutylicum P262 showing homology with endoglucanase genes from Bacillus spp. Applied and Environmental Microbiology. 54(5). 1289–1292. 54 indexed citations
17.
Zappe, Harold, et al.. (1987). Cloning and expression of a xylanase gene from Clostridium acetobutylicum P262 in Escherichia coli. Applied Microbiology and Biotechnology. 27(1). 22 indexed citations
18.
Zappe, Harold, David T. Jones, & D. R. Woods. (1986). Cloning and Expression of Clostridium acetobutylicum Endoglucanase, Cellobiase and Amino Acid Biosynthesis Genes in Escherichia coli. Microbiology. 132(5). 1367–1372. 44 indexed citations
19.
Zappe, Harold, et al.. (1986). Cloning, Expression, and Purification of Glutamine Synthetase from Clostridium acetobutylicum. Applied and Environmental Microbiology. 52(3). 413–419. 27 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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