S. E. DREWES

752 total citations
43 papers, 567 citations indexed

About

S. E. DREWES is a scholar working on Molecular Biology, Organic Chemistry and Plant Science. According to data from OpenAlex, S. E. DREWES has authored 43 papers receiving a total of 567 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Molecular Biology, 13 papers in Organic Chemistry and 13 papers in Plant Science. Recurrent topics in S. E. DREWES's work include Natural product bioactivities and synthesis (6 papers), Ethnobotanical and Medicinal Plants Studies (5 papers) and Phytochemistry and Bioactive Compounds (4 papers). S. E. DREWES is often cited by papers focused on Natural product bioactivities and synthesis (6 papers), Ethnobotanical and Medicinal Plants Studies (5 papers) and Phytochemistry and Bioactive Compounds (4 papers). S. E. DREWES collaborates with scholars based in South Africa, United Kingdom and Germany. S. E. DREWES's co-authors include J. Van Staden, Fatima Khan, George Casella, C.C. Appleton, Alvaro Viljoen, Neil R. Crouch, T.J. Edwards, S. Zschocke, Sandy van Vuuren and Rudolf Bauer and has published in prestigious journals such as Journal of Chromatography A, Journal of Ethnopharmacology and Phytochemistry.

In The Last Decade

S. E. DREWES

40 papers receiving 512 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
S. E. DREWES South Africa 14 291 231 112 76 46 43 567
S. F. Dossaji Kenya 14 347 1.2× 213 0.9× 147 1.3× 78 1.0× 27 0.6× 29 659
E. K. Adesogan Nigeria 15 289 1.0× 260 1.1× 87 0.8× 54 0.7× 42 0.9× 38 583
Ladislaus K. Mdee South Africa 14 292 1.0× 236 1.0× 169 1.5× 74 1.0× 26 0.6× 23 607
Wilfred T. Mabusela South Africa 16 296 1.0× 149 0.6× 164 1.5× 55 0.7× 27 0.6× 36 577
A. Hisham India 16 278 1.0× 366 1.6× 101 0.9× 56 0.7× 17 0.4× 36 658
Philip H. Coombes South Africa 16 304 1.0× 408 1.8× 93 0.8× 101 1.3× 27 0.6× 29 716
Elsa T. Gomes Portugal 11 167 0.6× 228 1.0× 77 0.7× 144 1.9× 21 0.5× 20 464
Else Lemmich Denmark 18 395 1.4× 303 1.3× 73 0.7× 207 2.7× 47 1.0× 25 899
R. Zelnik Brazil 15 153 0.5× 311 1.3× 70 0.6× 76 1.0× 29 0.6× 34 536
Gerda Fouché South Africa 14 295 1.0× 238 1.0× 127 1.1× 58 0.8× 35 0.8× 27 651

Countries citing papers authored by S. E. DREWES

Since Specialization
Citations

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

Fields of papers citing papers by S. E. DREWES

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of S. E. DREWES

This figure shows the co-authorship network connecting the top 25 collaborators of S. E. DREWES. A scholar is included among the top collaborators of S. E. DREWES 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 S. E. DREWES. S. E. DREWES 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.
DREWES, S. E.. (2011). From humble beginnings to a modern-day academic institution: 100 years of Chemistry at the University of Natal in Pietermaritzburg. Transactions of the Royal Society of South Africa. 66(2). 120–151.
3.
Zyl, Robyn L. van, Fatima Khan, T.J. Edwards, & S. E. DREWES. (2008). Antiplasmodial activities of some abietane diterpenes from the leaves of five Plectranthus species.. South African Journal of Science. 104. 62–64. 28 indexed citations
4.
DREWES, S. E., et al.. (2008). Hypoxis hemerocallidea—Not merely a cure for benign prostate hyperplasia. Journal of Ethnopharmacology. 119(3). 593–598. 56 indexed citations
5.
DREWES, S. E., et al.. (2006). Antimicrobial monomeric and dimeric diterpenes from the leaves of Helichrysum tenax var tenax. Phytochemistry. 67(7). 716–722. 33 indexed citations
6.
DREWES, S. E., et al.. (2001). Phytochemical research in South Africa : review article. South African Journal of Science. 97. 93–105. 16 indexed citations
7.
DREWES, S. E., et al.. (2001). A phytochemical basis for the potential use of Warburgia salutaris (pepper-bark tree) leaves in the place of bark : research article. South African Journal of Science. 97. 383–386. 15 indexed citations
8.
Zschocke, S., et al.. (2000). Analytical and pharmacological investigation of Ocotea bullata (black stinkwood) bark and leaves. Journal of Ethnopharmacology. 71(1-2). 219–230. 42 indexed citations
9.
Appleton, C.C., et al.. (1997). A semi-quantitative approach to the selection of appropriate candidate plant molluscicides — a South African application. Journal of Ethnopharmacology. 56(1). 1–13. 46 indexed citations
10.
DREWES, S. E., et al.. (1996). Constituents of muthi plants of Southern Africa: magical and molluscicidal properties. OpenDocs (Institute of Development Studies). 1 indexed citations
11.
Crouch, Neil R., et al.. (1993). Accumulation of Cyanidin-3-glucoside in Callus and Cell Cultures of Oxalis reclinata. Journal of Plant Physiology. 142(1). 109–111. 10 indexed citations
12.
DREWES, S. E., et al.. (1989). 1,2-Addition of Activated Vinyl Carbanions to α,β-Unsaturated Carbonyls. Synthetic Communications. 19(5-6). 959–964. 9 indexed citations
13.
DREWES, S. E., et al.. (1985). Synthesis of α-Methylene-γ-Lactones via Cr and Sn Complexes of β-Carbethoxy and β-Nitrile Allyl Bromides. Synthetic Communications. 15(12). 1067–1074. 30 indexed citations
14.
Staden, J. Van & S. E. DREWES. (1983). Properties and Activity of N-(purin-6-yl)glycine in the Soya Bean Callus Bioassay. Annals of Botany. 51(1). 149–151. 5 indexed citations
15.
DREWES, S. E. & Neville D. Emslie. (1982). ネシン酸合成中間体 I インテゲリネシン酸の全合成. 2079–2083. 1 indexed citations
16.
Staden, J. Van, et al.. (1982). Biological activity of 6‐(2,3,4‐trihydroxy‐3‐methylbutylamino)purine, an oxidation product of zeatin. Physiologia Plantarum. 55(2). 143–148. 13 indexed citations
17.
Staden, J. Van & S. E. DREWES. (1975). Identification of Zeatin and Zeatinriboside in Coconut Milk. Physiologia Plantarum. 34(2). 106–109. 48 indexed citations
18.
DREWES, S. E., et al.. (1975). A phenazine derivative from the condensation of o-phenylenediamine with 3,3-dimethylpentan-2,4-dione. Tetrahedron Letters. 16(2). 91–92. 1 indexed citations
19.
DREWES, S. E., et al.. (1971). Separation of isomeric lysine derivatives by ion-exchange chromatography. Journal of Chromatography A. 56(1). 171–175. 1 indexed citations
20.
DREWES, S. E., David G. Roux, J. Feeney, & Stefan H. Eggers. (1966). Stereochemistry of a natural 4,6-linked (+)-bileucofisetinidin. Chemical Communications (London). 368–368. 4 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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