A Machida

1.4k total citations
19 papers, 1.3k citations indexed

About

A Machida is a scholar working on Epidemiology, Hepatology and Immunology. According to data from OpenAlex, A Machida has authored 19 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Epidemiology, 14 papers in Hepatology and 8 papers in Immunology. Recurrent topics in A Machida's work include Hepatitis B Virus Studies (17 papers), Hepatitis C virus research (12 papers) and Immunotherapy and Immune Responses (8 papers). A Machida is often cited by papers focused on Hepatitis B Virus Studies (17 papers), Hepatitis C virus research (12 papers) and Immunotherapy and Immune Responses (8 papers). A Machida collaborates with scholars based in Japan, Croatia and United States. A Machida's co-authors include Makoto Mayumi, Hiroaki Okamoto, Y. Miyakawa, Y. Miyakawa, H. Iizuka, Kiyohiko Kurai, Yuichi Sugiyama, S Okada, M Mayumi and Hiroyuki Ohnuma and has published in prestigious journals such as The Journal of Immunology, Gastroenterology and Journal of Virology.

In The Last Decade

A Machida

19 papers receiving 1.2k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
A Machida Japan 16 1.0k 847 246 221 146 19 1.3k
J. Monjardino United Kingdom 22 1.5k 1.5× 1.4k 1.6× 231 0.9× 249 1.1× 73 0.5× 58 1.8k
Tohru Gotanda Japan 10 634 0.6× 520 0.6× 144 0.6× 130 0.6× 73 0.5× 18 827
Joe Kansopon United States 14 765 0.7× 1.0k 1.2× 166 0.7× 97 0.4× 160 1.1× 16 1.5k
T A United States 6 788 0.8× 313 0.4× 254 1.0× 103 0.5× 32 0.2× 6 1.1k
Robert Deleys Belgium 14 310 0.3× 269 0.3× 278 1.1× 444 2.0× 113 0.8× 21 967
David Y. Chien United States 7 1.3k 1.3× 1.8k 2.1× 187 0.8× 195 0.9× 283 1.9× 10 2.1k
Shuping Tong United States 30 2.8k 2.7× 2.5k 2.9× 337 1.4× 453 2.0× 38 0.3× 90 3.1k
Santiago Dueñas‐Carrera Cuba 17 380 0.4× 439 0.5× 164 0.7× 105 0.5× 182 1.2× 46 655
Shlomo Dagan Israel 15 530 0.5× 460 0.5× 173 0.7× 105 0.5× 113 0.8× 42 835
Shinichi Asabe Japan 17 718 0.7× 773 0.9× 190 0.8× 235 1.1× 125 0.9× 28 1.4k

Countries citing papers authored by A Machida

Since Specialization
Citations

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

Fields of papers citing papers by A Machida

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of A Machida

This figure shows the co-authorship network connecting the top 25 collaborators of A Machida. A scholar is included among the top collaborators of A Machida 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 A Machida. A Machida 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.
Machida, A. (1994). Anti-preS2 neutralizes the hepatitis B virus variant with a vaccine-escape mutation at the amino acid position 126 or 145 within the S gene. International Hepatology Communications. 2(3). 186–189. 3 indexed citations
2.
Satow, T., et al.. (1993). Simultaneous determination of the migration coefficient of each base in heterogeneous oligo-DNA by gel filled capillary electrophoresis. Journal of Chromatography A. 652(1). 23–30. 20 indexed citations
3.
Okamoto, Hiroaki, Yuan Wang, Toru Tanaka, et al.. (1993). Trans-complementation among naturally occurring deletion mutants of hepatitis B virus and integrated viral DNA for the production of viral particles with mutant genomes in hepatoma cell lines. Journal of General Virology. 74(3). 407–414. 23 indexed citations
4.
Ohnuma, Hiroyuki, A Machida, Hiroaki Okamoto, et al.. (1993). Allelic subtypic determinants of hepatitis B surface antigen (i and t) that are distinct from d/y or w/r. Journal of Virology. 67(2). 927–932. 19 indexed citations
5.
Yoshikawa, Akira, Toru Tanaka, Yuji Hoshi, et al.. (1993). Chimeric hepatitis B virus core particles with parts or copies of the hepatitis C virus core protein. Journal of Virology. 67(10). 6064–6070. 33 indexed citations
6.
Okamoto, Hiroaki, S Okada, Yuichi Sugiyama, et al.. (1991). Nucleotide sequence of the genomic RNA of hepatitis C virus isolated from a human carrier: comparison with reported isolates for conserved and divergent regions. Journal of General Virology. 72(11). 2697–2704. 429 indexed citations
7.
Machida, A, Hiroyuki Ohnuma, Fumio Tsuda, et al.. (1991). Phosphorylation in the carboxyl-terminal domain of the capsid protein of hepatitis B virus: evaluation with a monoclonal antibody. Journal of Virology. 65(11). 6024–6030. 57 indexed citations
8.
Takahashi, Kazuaki, Hiroshi Yoshizawa, A Machida, et al.. (1991). Molecular heterogeneity of e antigen polypeptides in sera from carriers of hepatitis B virus. The Journal of Immunology. 147(9). 3156–3160. 26 indexed citations
9.
Ohnuma, Hiroyuki, Emiko Takai, A Machida, et al.. (1990). Synthetic oligopeptides bearing a common or subtypic determinant of hepatitis B surface antigen.. The Journal of Immunology. 145(7). 2265–2271. 17 indexed citations
10.
Luengrojanakul, Pairoj, Hiroyuki Ohnuma, Katsuro Tachibana, et al.. (1990). Common and subtypic determinants of hepatitis B surface antigen particles: susceptibility to reduction and/or alkylation evaluated with monoclonal antibodies.. PubMed. 60(5). 253–61. 3 indexed citations
11.
12.
Ohnuma, Hiroyuki, A Machida, Emiko Takai, et al.. (1986). Translation products of pre-S(1), pre-S(2) regions and the S gene of hepatitis B virus: susceptibility of their antigenic activities to treatment with heat, urea, formalin or pepsin.. PubMed. 66(3). 709–15. 3 indexed citations
13.
Ohnuma, Hiroyuki, Kazuaki Takahashi, Shinji Kishimoto, et al.. (1986). Large Hepatitis B Surface Antigen Polypeptides of Dane Particles With the Receptor for Polymerized Human Serum Albumin. Gastroenterology. 90(3). 695–701. 29 indexed citations
14.
15.
Machida, A, Seiji Kishimoto, Hiroyuki Ohnuma, et al.. (1983). A hepatitis B surface antigen polypeptide (P31) with the receptor for polymerized human as well as chimpanzee albumins. Gastroenterology. 85(2). 268–274. 154 indexed citations
16.
Takahashi, Kenichi, A Machida, Gunki Funatsu, et al.. (1983). Immunochemical structure of hepatitis B e antigen in the serum.. The Journal of Immunology. 130(6). 2903–2907. 206 indexed citations
17.
Takahashi, Kazuo, Masaki Imai, Masahiro Nomura, et al.. (1981). Demonstration of the Immunogenicity of Hepatitis B Core Antigen in a Hepatitis B e Antigen Polypeptide (P19). Journal of General Virology. 57(2). 325–330. 15 indexed citations
18.
Mishiro, Shunji, Kenichi Takahashi, A Machida, et al.. (1980). A 49,000-dalton polypeptide bearing all antigenic determinants and full immunogenicity of 22-nm hepatitis B surface antigen particles.. The Journal of Immunology. 124(4). 1589–1593. 70 indexed citations
19.
Yoshizawa, Hiroshi, Yuta Itoh, Takashi Takahashi, et al.. (1979). Demonstration of Hepatitis B e Antigen in Hepatitis B Core Particles Obtained from the Nucleus of Hepatocytes Infected with Hepatitis B Virus. Journal of General Virology. 42(3). 513–519. 39 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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