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Introduction: The purpose of this study is to analyze the multiple sclerosis research in Science Citation Index-Expanded from 1992 to 2019 in order to determine the top features, trends, and topics. Methods: In this scientometric study, research population was all articles related to multiple sclerosis in the Web of Science from 1992 to 2019. These articles were retrieved from the Science Citation Index-Expanded and analyzed based on various indicators and characteristics. Results: There was a significant increase in the number of articles from 408 in 1992 to 2756 in 2019. A sum of 42,112 articles related to multiple sclerosis has been published in 3,032 journals, which were classified among the 131 Web of Science categories. The top two categories were clinical neurology and neurosciences. Multiple Sclerosis Journal published the most articles. Articles published in the Neurology Journal also had the highest citation per publication. Most of the articles were in English, while 23 other languages were used in the articles. Articles in Japanese and English with 7 and 6.9 authors have a higher average of authors than articles in other languages. English language articles received more citations than articles in other languages. The frequency of used keywords in title, abstract, author keywords, and keywords plus analysis showed that “therapy”, “disability”, “neurodegeneration”, “demyelination” and “MRI” show an increasing trend in the multiple sclerosis articles. Conclusion: The result of this study can help the policy makers and researchers realize the panorama of multiple sclerosis research and design future research.

Every creature on this planet needs water to survive and water is one of the most significant natural resources. A moderate attempt has been made in this study to understand the research trends in drinking water in India during the period of 1990 – 2019, based on Science Citation Index Expanded the Web of Science Core Collection by Clarivate Analysis. A total 74,277 documents were found, of which ‎68,029 research articles, in that 2903 articles were drinking water publications relating to India. The results indicated that the annual number of research articles have increased from about eight articles in early years 1990 to 269 articles in the latest year 2019. Also out of 2903 drinking water articles 2306 (79%) were country independent articles and 597 (21%) articles were internationally collaborative articles with 104 countries. The researchers used top three Web of Science categories ‘environmental sciences’, ‘water resources’ and ‘toxicology’. The study found that the Environmental Monitoring and Assessment was the most productive journal and Indian Institutes of Technology was the most productive institution among top ten most productive institutions in India.

Background An adequate response to health needs to include the identification of research patterns about the large number of people living in the tropics and subjected to tropical diseases. Studies have shown that research does not always match the real needs of those populations, and that citation reflects mostly the amount of money behind particular publications. Here we test the hypothesis that research from richer institutions is published in better-indexed journals, and thus has greater citation rates. Methods The data in this study were extracted from the Science Citation Index Expanded database; the 2020 journal Impact Factor (IF2020) was updated to 30 June 2021. We considered places, subjects, institutions and journals. Results We identified 1041 highly cited articles with ≥100 citations in the category of tropical medicine. About a decade is needed for an article to reach peak citation. Only two COVID-19–related articles were highly cited in the last 3 y. The most cited articles were published by the journals Memorias Do Instituto Oswaldo Cruz (Brazil), Acta Tropica (Switzerland) and PLoS Neglected Tropical Diseases (USA). The USA dominated five of the six publication indicators. International collaboration articles had more citations than single-country articles. The UK, South Africa and Switzerland had high citation rates, as did the London School of Hygiene and Tropical Medicine in the UK, the Centers for Disease Control and Prevention in the USA and the WHO in Switzerland. Conclusions About 10 y of accumulated citations is needed to achieve ≥100 citations as highly cited articles in the Web of Science category of tropical medicine. Six publication and citation indicators, including authors’ publication potential and characteristics evaluated by Y-index, indicate that the currently available indexing system places tropical researchers at a disadvantage against their colleagues in temperate countries, and suggest that, to progress towards better control of tropical diseases, international collaboration should increase, and other tropical countries should follow the example of Brazil, which provides significant financing to its scientific community.

Introduction: An outbreak of the COVID-19 was appended in the central Chinese city of Wuhan in December 2019. Lots of related papers were published in the world since then. Objective: This study aimed to identify and analyze the characteristics of COVID-19 publications in the Science Citation Index Expanded (SCI-EXPANDED) published by Latin Americans in 2020. Methods: Documents including searching keywords in their title, abstract, or author keywords from SCI-EXPANDED were assessed. The analyzed aspects covered characteristics of document types, languages, Web of Science categories, and journals. Publication performances of countries and institutions were evaluated by six publication indicators and two citation indicators. Results: A lower percentage of articles and a higher percentage of Spanish language were found. Web of Science category of general and internal medicine published the most articles. The Clinics was the most popular journal. The Cadernos de Saude Publica and Revista da Associacao Medica Brasileira published the most publications and reviews, respectively. Brazil took a leading position in the six publication indicators. The University of São Paulo in Brazil was the most productive institution. Based on the number of citations from the Web of Science Core Collection since publication to the end of 2020, 10 most frequently cited publications were presented. In addition, the analysis of words in publication titles, author keywords, and KeyWords Plus was performed to find the main research focuses. Conclusions: In 2020, a total of 3 056 COVID-19 documents in SCI-EXPANDED were published by Latin Americans mainly in the Web of Science categories of ‘general and internal medicine’ and ‘public, environmental and occupational health’. More letters and editorial materials and fewer articles were published in the first year of its outbreak. A higher percentage of Spanish and Portuguese publications was found. Brazil dominated the six publication indicators. The University of São Paulo in Brazil ranked top in all the six publication indicators while the Technological University of Pereira in Colombia had a higher impact for their first- and corresponding-author publications. Health and infection were the main research focuses.

Objective The aim of this study was to analyze the characteristics of the COVID‐19 publications in the ten psychology‐related Web of Science categories in the social science citation index 10‐month following the COVID‐19 outbreak. Methods Six publication indicators were examined across authors, institutions, and countries. Results Analyses showed that the United States has produced the highest number of empirical investigations into the psychological impact of COVID‐19, and the majority of the research across all countries was in clinical and psychopathology. Distribution of journals and psychology‐related Web of Science categories were analyzed. Frequently used words in article title, author keywords, and KeyWords Plus were also presented. Conclusions The findings suggest that there are substantial clinical implications associated with COVID‐19. There are recommendations offered for future research and clinical practice.

Temporomandibular disorders (TMD) are common, can be both painful and non-painful, and encompass various conditions affecting the temporomandibular joint, the masticatory muscles or both TMD. Therefore, the purpose of this bibliometric analysis was to synthetically analyze citation performance in TMD, to address a more innovative method including details of article title, author keyword, KeyWords Plus, and abstracts.Data used in this study were retrieved from the Clarivate Analytics Web of Science Core Collection, the online version of the Science Citation Index Expanded (SCI-EXPANDED) between 1992 and 2021. The distribution of key words in the article title and author‑selected keywords were used to evaluate research trends.Of the 7,228 documents in SCI-EXPANDED, 6,138 documents met all inclusion criteria and were included in the final analysis, of which 4,945 were articles. The present bibliometric analysis of the articles published in the research filed of TMD revealed that orofacial pain, bruxism, chronic pain, and myofascial pain are the most commonly used keywords by the authors. Further, over the last 30 years 4,945 articles are published in the field of TMD, and the far most frequently cited study was published 8 years ago and handles the diagnostic criteria of TMD. The USA and Brazil were top two ranking productive countries of publication on TMD. The most productive journal was Journal of Oral Rehabilitation, followed by Cranio-The Journal of CraniomandibularSleep Practice and Journal of OralFacial Pain and Headache. The most productive authors were P. Svensson, R. Ohrbach, and F. Lobbezooas. The most productive institutes were Sao Paulo University (Brazil), Malmo University (Sweden), and Washington university (USA) CONCLUSION: Based on the outcome of this bibliometric study, the authors hope that both clinicians and researchers will have information to shape their future research focus, finding prominent institutions in their nearby area, or even to be stimulated to initiate new international or even multinational collaborations.

Editorial materials express the opinions of the scientific community and guides the publication foci; thus, providing insight into the dynamics of the knowledge ecosystem in a scenario that impacts innovation and public policies. The purpose of this bibliometric analysis was to identify the main characteristics of the editorial materials published at the beginning stage of the COVID-19 pandemic, published between 2019 and April 30, 2020 and indexed in the Web of Science Core Collection. A total of 537 editorial materials were written by 1,455 authors, primarily in English, and in the general and internal medicine category. The majority of these editorial materials were published in the British Medical Journal and Lancet. The United States, China, and United Kingdom had the most editorial materials, with Harvard Medical School, Imperial College, and Oxford University were the leading universities. Richard Horton was the most prolific author and the editorial material by Hui et al. (2020) was the most cited. In the initial stage of COVID-19, editorial materials reflected contingent aspects of the course of the infection at the global, regional, and national levels. In the emerging and rapidly developing crisis of COVID-19, editorial materials allow the scientific community to engage in the ongoing discussions. Analysis of editorial materials fosters the understanding of the dynamics of the knowledge ecosystem.

The ongoing pandemic of the coronavirus disease 2019 (COVID-19) is a global health emergency. Thousands of articles have been published to tackle this crisis. Here, a bibliometric study of the publications in environmental studies has been conducted to identify the emerging research trends in this field in the era of COVID-19. Bibliometric analysis serves as a useful tool to evaluate research productivity and scholarly trends in a field. For this, publications were searched in nine environment-related subject categories indexed in Science Citation Index Expanded (SCI-EXPANDED) database of the Web of Science Core Collection. A bibliometric evaluation of 495 relevant documents was performed to identify various essential research indicators, including the type of the publication, the most prominent journals, subject categories, authors, institutions, and the countries, that contributed significantly to this theme. Major focus of this bibliometric study is to illustrate the potential research hotspots emerged during this pandemic. It has been found that significant amount of research has been conducted for the assessment of environmental quality and its contribution in environmental transmission of COVID-19. In addition to its positive impacts on environment, COVID-19 has contributed indirectly in worsening many environmental threats such as increased exposure to disinfectants and antimicrobials, poor solid waste management, and food insecurity. Researchers have also been focusing on the strategies for the planning of post-COVID-19 cities and buildings and to protect the ecology. This bibliometric study allowed the visualization of research agenda in the field of environmental studies during this pandemic.

BackgroundClassic articles are defined as research papers with a total citation of one thousand or more. The present study is to identify and analyse the characteristics of the classic articles in apoptosis research.MethodClassic articles with total of 1,000 or more citations from Web of Science Core Collection since year of publication to the end of 2017 were basically assessed regarding their document types, languages, journals, and Web of Science categories within 1900 to 2017.ResultThe study showed 418 classic documents in apoptotic research including 260 articles published between 1972 and 2012. The most productive Web of Science category was multidisciplinary sciences.Naturepublished most of these classic articles followed byCell, andScience. The most productive country and institution were United States and Harvard University respectively. The author S.J. Korsmeyer from Harvard University was the most productive in apoptosis field and published 13 classic apoptosis articles while the author J.C Reed had more potential to publish classic apoptosis articles in future. The author J.C. Reed and V.A. Fadok had equal potential to publish the same number of classic articles as first- and corresponding-author. Article of Kerr et al. in 1972 was the most popular and cited apoptosis article. The most impact article in 2017 was article entitled “Tumor-associated B7-H1 promotes T-cell apoptosis: A potential mechanism of immune evasion” by Dong et al. in 2002.ConclusionThis study seems to identify the most industrious authors, institutions, and countries in the field of apoptosis research. It also tends to reveal the historical and discoveries related to the pathophysiology of apoptosis as well as the most impact publications on apoptosis studies.

Editorial.

A bibliometric analysis was conducted to evaluate the global scientific output of KSHV/HHV8 research in the Science Citation Index Expanded from 1991 to 2016. The publications were analysed in term...

This study aimed to evaluate the tendency of insomnia articles in SCI-EXPANDED database. Data was obtained from the online version of Science Citation Index Expanded (SCI-EXPANDED) database in the ...

This study aimed to analyze the characteristics of artificial intelligence-related publications in Science Citation Index Expanded (SCIEXPANDED) from 1991 to 2018. The analyzed aspects covered dist...

The present study is to identify and analyse the characteristics of the highly cited articles in Web of Science category of health policy and services, within the publication year from 1923 to 2017...

This study aimed to identify and analyze the characteristics of highly cited articles in phosphoinositide 3-kinase (PI3K) research using the Science Citation Index Expanded from 1900 to 2016. Altog...

Introduction:Bibliometric analyses of research in Sri Lanka, a lower-middle income island nation in South Asia, has focused mainly on medical research, concluding that there is a need for increased research productivity and impact, and for local solutions to health concerns. There has been no general bibliometric analysis across scientific disciplines in the nation, or any study that covers a long period of time to identify general time trends. Objective:To measure and analyse Sri Lankan research by focusing on subjects, authors, institutions, journals and citation for half a century. Methods:We used an advanced search method to extract publications with the word “Sri Lanka” in the SCI-EXPANDED, and calculated indicators such as total citations from Web of Science Core Collection since publication year to the end of 2019, citations in 2019, and mean citations per publication. Journal data were taken from 2019 Journal Citation Report. Affiliation re-classification was done to ensure consistency regarding the origin of all publications. Publications were further analysed based on collaboration, and first and corresponding authorship. Results:We retrieved 16 069 publications in 19 document types (77 % articles). Corrections had the highest number of authors per publication (616) followed by articles (116). Four articles had more than 5 000 authors and 593 articles had more than 1 000 authors. The highest citations in this database were for international megaprojects where Sri Lankan authors played minor roles. The UK had the most collaborative articles with Sri Lanka (19 %). The articles were published in 3 051 journals across 177 Web of Science categories. The category of Public, environmental and occupational health, with 193 journals, had 6.7 % of all articles, followed by environmental sciences (6.6 %). Conclusion:Sri Lanka has an unusually strong pattern of participating as small role players in international megaprojects about health and physics. Sri Lankan authors should be encouraged to expand their horizons by researching non-applied fields that are the basis of all innovation; to strengthen their own journals so that they have better visibility and impact, and to improve their positions in international projects that are published in larger journals. Introducción:Los análisis bibliométricos de la investigación en Sri Lanka, una nación insular de ingresos mediano-bajos en el sur de Asia, se han centrado principalmente en la investigación médica, concluyendo que existe la necesidad de aumentar la productividad y el impacto de la investigación, y de soluciones locales a los problemas de salud. No ha habido un análisis bibliométrico general de disciplinas científicas o algún estudio que cubra un período largo de tiempo para identificar tendencias generales. Objetivo:Medir y analizar la investigación de Sri Lanka centrándose en temas, autores, instituciones, revistas y citas, durante medio siglo. Métodos:Utilizamos un método de búsqueda avanzada para extraer publicaciones con las palabras "Sri Lanka" en el SCI-EXPANDED, y calculamos indicadores como el total de citas de Web of Science Core Collection desde el año de publicación hasta finales de 2019, citas solo en 2019, y media de citas por publicación. Los datos de revistas son del Journal Citation Report 2019. Revisamos manualmente las afiliaciones para garantizar su coherencia, y, de todos los tipos de publicación, analizamos en detalle los artículos en función de la colaboración y la autoría. Resultados: Hallamos 16 069 publicaciones en 19 tipos de documentos (77 % artículos). Las correcciones tuvieron el mayor número de autores por publicación (616), seguidas de los artículos (116 autores en promedio); cuatro artículos tenían más de 5 000 autores y 593 artículos tenían más de 1 000 autores. Las citas más altas en esta base de datos fueron para megaproyectos internacionales en los que los autores de Sri Lanka desempeñaron papeles menores. El Reino Unido tuvo más artículos colaborativos con Sri Lanka (19 %). Los artículos se publicaron en 3 051 revistas de 177 categorías del Web of Science. La categoría d Salud pública, ambiental y ocupacional, con 193 revistas, tuvo el 6.7 % del total de artículos, seguida de Ciencias ambientales(6.6 %). Conclusión:En Sri Lanka hay una tendencia inusual a participar como pequeños actores en megaproyectos internacionales sobre salud y física. Debería alentarse a quienes hacen ciencia en Sri Lanka a ampliar sus horizontes investigando campos no aplicados, que son la base de la innovación; a fortalecer sus propias revistas para lograr mayor visibilidad e impacto, y a mejorar su ubicación en proyectos internacionales que se publican en revistas más grandes.

Introduction:Sudan is the third largest country in Africa and has rich reserves of petroleum and other ground resources, but its per capita Gross Domestic Product is only $808 and researchers work in insufficient institutional facilities and with little funding. Previous studies about its scientific productivity have been limited to specific subjects and relatively short periods, with no large analyses until now. Objective:To analyze the scientific output of Sudan in depth, considering all research areas and several decades of scientific activity. Methods:We retrieved the documents with “Sudan” in field country in the Science Citation Index Expanded for the period 1900-2019. Results:We retrieved over 9 000 publications and found that most were articles; that citation was higher for review articles and book chapters, and that this index mostly covered articles in English. Beginning in 1972, the number of publications in this database has increased rapidly. The citation lifespan indicates slow growth in the Sudanese scientific literature, and collaboration is frequent both nationally and internationally, possibly because the scarce resources make collaboration almost compulsory. Most external collaboration is done with Saudi Arabia but citation is higher for articles resulting from international megaprojects, led by Europe and the USA, in which Sudanese researchers play secondary roles. Research focusses on applied technological subjects with little innovation value. Women play a smaller role in Sudanese science. Conclusions:Our recommendations for Sudanese science include increasing the number of women in leading research positions; providing funding directly to researchers (i.e., bypassing bureaucratic bodies); increasing basic research to avoid stagnation; training Sudanese researchers for leading positions; and identifying specific research areas where Sudan can lead in its region. Introducción: Sudán es el tercer país más grande de África y tiene ricas reservas de petróleo y otros recursos terrestres, pero su Producto Interno Bruto per cápita es de solo $ 808 y los investigadores trabajan en instalaciones institucionales deficientes y con poca financiación. Los estudios previos sobre su productividad científica se han limitado a temas específicos y períodos relativamente cortos. Objetivo:Analizar la producción científica de Sudán en profundidad, considerando todas las áreas de investigación y varias décadas. Métodos:Recuperamos los documentos con “Sudán” como país de origen en el Science Citation Index Expandedpara el período 1900-2019. Resultados:Hallamos más de 9 000 publicaciones y encontramos que la mayoría eran artículos; que fueron más citados los artículos de revisión y capítulos de libros, y que esta base de datos cubría principalmente artículos en inglés; desde 1972, el número de publicaciones en ella ha aumentado rápidamente. La vida útil de las citas indica un crecimiento lento en la literatura científica sudanesa, y la colaboración es frecuente tanto a nivel nacional como internacional, posiblemente porque los escasos recursos hacen que la colaboración sea casi obligatoria. La mayor parte de la colaboración externa se realiza con Arabia Saudita, pero hay más citas para los artículos resultantes de megaproyectos internacionales, dirigidos por Europa y Estados Unidos, en los cuales los investigadores sudaneses desempeñan papeles secundarios. La investigación se centra en temas de tecnología aplicada con poco valor de innovación. Conclusiones:Nuestras recomendaciones para la ciencia sudanesa incluyen aumentar el número de mujeres en altos puestos; proporcionar financiación directamente a los investigadores (sin pasar por organismos burocráticos); ir más allá de la investigación aplicada para evitar el estancamiento; capacitar al personal sudanés para puestos de liderazgo; e identificar áreas de investigación específicas donde Sudán puede liderar en su región.

Ye and Zhang used inappropriate search keywords, databases, and methods published a bibliometric paper in the International Journal of Health Planning and Management. The comment pointed out the problems, evidence, and improved methods of the study. The authors missed many medication-adherence documents. However, many documents not related to medication-adherence are included. Finally, appropriate search keywords and methods are proposed.

BACKGROUND: The need for postmastectomy breast reconstruction surgery has increased dramatically, and significant progress has been made both in implant and autologous based breast reconstruction in recent decades. In this paper, we performed a bibliometric analysis with the aim of providing an overview of the developments in breast reconstruction research and insight into the research trends. METHODS: We searched the Science Citation Index Expanded database and the Web of Science Core Collection for articles published between 1991 to 2018 in the topic domain, using title, abstract, author keywords, and KeyWords Plus. Four citation indicators TCyear, Cyear, C(0) and CPP(year) were employed to help analyse the identified articles. RESULTS: The number of scientific articles in breast reconstruction in this period steadily increased. It took most articles nearly a decade to hit a plateau in terms of citation counts. Plastic and Reconstructive Surgery, Annals of Plastic Surgery, and Journal of Plastic Reconstructive and Aesthetic Surgery published the largest number of articles on breast reconstruction. Nine of the top ten most prolific publications were based in the USA. The research highlights related to breast reconstruction were implant-based breast reconstruction, deep inferior epigastric perforator (DIEP) flap breast reconstruction, and superficial inferior epigastric artery (SIEA) flap breast reconstruction. CONCLUSIONS: This bibliometric analysis yielded data on citation number, publication outputs, categories, journals, institutions, countries, research highlights and tendencies. It helps to picture the panorama of breast reconstruction research, and guide the future research work.

Child sexual abuse (CSA) is a serious public health problem (Gilbert et al. in Lancet 373(9658):167–180, 2009a. https://doi.org/10.1016/S0140-6736(08)61707-9; Singh et al. in J Fam Med Prim Care 3(4):430–435, 2014. https://doi.org/10.4103/2249-4863.148139; Veenema et al. in Int J Nurs Stud 52(4):864–881, 2015. https://doi.org/10.1016/j.ijnurstu.2014.10.017) and a risk factor for child development (Barth et al. in Int J Public Health 58(3):469–483, 2013. https://doi.org/10.1007/s00038-012-0426-1). The present bibliometric analysis evaluated research performance and trends of CSA research from 1991 to 2017. The analysis was based on data extracted from Science Citation Index Expanded. The results revealed a progressive increase in the volume of indexed articles that sharply grows between 2009 and 2017. The majority of the papers analyzed were in the area of psychiatry. In total, these articles were published mostly in English and in 777 journals, the largest volume of articles were in the field of pediatrics. The journal authors come from 105 countries, with the United States ranking on the top in all bibliometrics indicators assessed, including number of articles produced by institution. Three thousand seven hundred and fourteen articles (3714) articles on CSA were utilized to calculate the Y-index for authors. From the authors, J.D. Bremner and G. Hornor have the highest contributions with a Y-index of 24 (0.7854). Other findings indicated that the peak of citations per publication occured in the 5th year. The most frequently cited and most impactful article was from Felitti et al. (Am J Prev Med 14(4):245–258, 1998. https://doi.org/10.1016/S0749-3797(98)00017-8). Six of the ten highly cited papers maintained their impact according to the 2017 citations. Data also revealed that research trends in the field of CSA can be clustered into 11 categories, with violence being the one that concentrates the greatest number of terms used in the papers. The three main hotspots are sexual abuse, maltreatment and sexual development. Lastly, this article discusses the type of research that contributes to the body of knowledge about CSA and the challenges this poses for the projection of future studies.

Which Helicobacter pylori publications in the Web of Science are classic? This study identified classic papers by referring to the Science Citation Index Expanded, which covers 59,904 documents rel...

Sustainable city has been a global concern in recent years, involving natural science and social science research. However, few studies have attempted to map the global research of sustainable city. This study aimed to reveal the global performance and development of sustainable city research during 1992 to 2016, using a bibliometric analysis based on Science Citation Index Expanded (SCI-EXPANDED) and Social Sciences Citation Index (SSCI) on Web of Science. Research performance, research emphases and trends were illustrated by bibliometric indicators and newly developed visualization tools, like Science of Science (Sci2), Gephi, and alluvial diagram. Sustainable city research in natural science and social science were well-matched in quantity, and had similar and different characteristics in terms of different investigated aspects. China ranked first in natural science research, while the USA was the leading country in social science research. More categories and clusters were involved in sustainable city field, indicating more interdisciplinary integration was undergoing. Energy and fuels in natural science field, and interdisciplinary applications mathematics in social science field started to attract more attention. Statistical analysis of words in title, author keywords, and KeyWords Plus has been investigated to monitor the development of sustainable city research. Finally, three critical issues in sustainable city research based on the clues by the analysis of these keywords were reviewed and discussed.

Dance performance reviews (D. P. reviews) are one document type in the Arts & Humanities Citation Index (A&HCI). In this paper we analyze D. P. reviews in Web of Science from 1992 to 2016 in terms ...

A bibliometric analysis based on the Science Citation Index Expanded database from 1991 to 2020 was performed to obtain insight into the future direction of wound dressing research. The study focused on the publication’s performance in terms of yearly outputs and citations, mainstream journals, categories of the Web of Sciences, top countries, leading institutions, trends in research, and hotspots. A summary of the most commonly used keywords extracted from words in the paper title analysis, authors’ keyword analysis, and KeyWords Plus analysis served as the foundation for determining current research priorities and future trends. The findings revealed that the annual output of the corresponding scholarly articles remained more or less the same during the first decade, followed by a rapid increase in the remaining period of the study. Tissue engineering would be the future of the existing wound dressing research. Biomaterials and electrospinning are gaining importance as raw materials and fabrication techniques for wound dressing. Advanced wound dressings with antimicrobial functionality and sustained drug release properties are becoming a popular research avenue in the wound dressing research field.

Background The present study aims to identify and analyze the characteristics of highly cited publications on Multiple sclerosis in the Science Citation Index Expanded. Methods Documents that had 100 citations or more were considered as the highly cited documents. Highly cited publications were analyzed in the distribution of document types, languages, publication years, Web of Science categories, and journals as well as publication performance of countries, institutions, and authors. The six and five publication indicators were applied to compare publications of the countries and the institutes respectively. Highly cited authors were analyzed by Y-index. Results In general, articles spent about 12 years to be highly cited articles. The USA dominated the production by the six publication indicators. Harvard University was the most active in research on multiple sclerosis while the University of California, Los Angeles in the USA shows the most independent research. M. Filippi was recognized as the most productive author who had the most articles as the corresponding author. Conclusion The findings may be of interest to multiple sclerosis researchers and policymakers all around the world.

Background Nonunion continues to be the most frequent and challenging complication to treat following fracture fixation. Herein, we carried out a bibliometric analysis aiming to identify the key researchers, centres and research trends developed during the past 30 years in this important clinical condition. Methods The Science Citation Index Expanded database and the Web of Science Core Collection were interrogated for manuscripts published between 1990 and 2019 in the topic domain, utilising title, abstract, author keywords and KeyWords Plus. Overall, such citation indicators were used as TCyear, Cyear and CPPyear to help analyse the identified manuscripts. Results Over the prespecified period, there was a steady increase in the number of articles published in fracture nonunion. In total, 12 languages were the primary languages in the documents, with English being the most prevalent. The CPP sharply increased to reach a plateau in three full years and up to a peak in ten full years. A total of 8976 nonunion-related articles in Science Citation Index Expanded (SCI-EXPANDED) were published in 790 journals. The 8976 articles were published by 26,079 authors among 101 different countries. There is a slightly fluctuating steady increase of articles from 116 in 1991 to 201 in 2003, and thereafter, the number of articles sharply increased to reach a plateau in 2015. Seven possible main research foci in nonunion-related research were identified including: epidemiology, classification, aetiology, diagnosis/prediction, treatment modalities, functional outcomes and health economics. Conclusions This bibliometric analysis revealed information on citation number, publication outputs, categories, journals, institutions, countries, research highlights and tendencies. The current research activity on fracture nonunion identified key opinion leaders and leading research institutions focusing on this important clinical condition. It is hoped that the informed included will aid to guide research work in the foreseeable future.

Li et al. used inappropriate search keywords for their bibliometric in International Review of Economics & Finance. A huge mistake was found that may result in misleading readers of the journal. This comment pointed out details about the mistakes.

COVID-19 breakout calls for immediate research explorations. The objective of this study is to perform a bibliometric analysis of all COVID-19-related publications in Science Citation Index Expanded (SCI-EXPANDED) in the early stage of the outbreak. Analysis parameters include performances of authors, institutes, and countries as well as distributions of Web of Science categories, journals, languages, and types of publications. Results show that 32% of total papers were published as editorial materials and an overwhelming production from Chinese research institutes. An association of research indexes with the number of cases was also found.

Ambio is a leading journal in environmental science and policy, sustainable development and human-environment interactions. The paper at hand aims to run a bibliometric analysis to inspect the main publications features of Ambio in Science Citation Index Expanded SCI-EXPANDED. For this scope, a bibliometric survey has been carried out to investigate the journal’s historic characteristics in the Web of Science (WoS) categories of environmental sciences and environmental engineering for Ambio from 1980 to 2019. These are the categories for which the journal has been indexed throughout the indexed time frame. The paper proposes technical and methodological innovations, including improvements in the methods and original characteristics analyzed. Documents published in Ambio were searched out from SCI-EXPANDED. Six publication indicators were applied to evaluate the publication performance of countries, institutes and authors. Three citation indicators were used to compare publications. As a parameter, the journals’ impact factor contributor was applied to compare the most frequently cited publications. The journals’ impact factor contributing publications were also discussed. Results show that Sweden ranked top in six publication indicators and that the top three productive institutes were located in Sweden. A low percentage of productive authors emerged as a journal’s impact factor contributor. Similarly, a low relationship between the IF contributing publications and the highly cited publications were also found. Less than half of the top 100 highly cited publications in Ambio did not lie within the high impact in most the recent year of 2019. Three members of the advisory board in Ambio were the main productive authors. T.V. Callaghan contributed to most of the publications while papers published by J. Rockstrom as first and corresponding author contributed the most to the journal’s impact factor. An article authored by Steffen et al. (2007) scored the highest total citations in 2019.

Introduction: In Benin, a tropical West African country of 11 million inhabitants where the economy is based on agriculture, the only bibliometric work available has focused on the role of collaboration among researchers, but there are no general long term studies of the country’s scientific output. Objective: To analyse the scientific output of Benin, according to the Science Citation Index Expanded, in a 46-year period. Methods: We searched for “Benin” in the country/region field of the index and analysed the results with descriptive statistics. Results: We found 4 557 documents, published between 1973 and 2018. They closely match the trends previously found in other small tropical countries: domination of articles over other types of publication like letters and notes; increase in total number of articles published each year; small collaborations in large American and European projects; and a long article lifespan that reflects the relatively slow accumulation of scientific research in tropical regions. Considering the size of the country’s economy, Benin has a good level of scientific productivity. Conclusion: In its scientific activity, Benin is similar to other tropical countries, and would benefit from increased cooperation among local researchers; from less dependence on small participations in international megaprojects, and from opening the door to research in areas of innovation rather than just solving immediate problems. Introducción: Benín es un país tropical de África occidental con 11 millones de habitantes y una economía basada en la agricultura. Los únicos estudios disponibles sobre su producción se han enfocado en el papel que juega la colaboración entre investigadores, y no hay estudios previos de enfoque amplio y larga duración sobre la producción científica del país. Objetivo: Analizar la producción científica de Benín incluida en el Science Citation Index Expanded en un período de 45 años. Métodos: Buscamos con la palabra "Benin" en el campo de país/región en búsqueda avanzada del índice y los analizamos con estadísticas descriptivas. Resultados: Encontramos 4 557 documentos, publicados entre 1973 y 2018 (consulta: 5 nov. 2019). Benín coincide estrechamente con las tendencias encontradas en otros países tropicales pequeños: los artículos son el principal tipo de publicación; hay un aumento en el total de publicaciones; se disfruta de colaboración internacional bien financiada; y los artículos tienen una larga vida útil, que refleja el lento ritmo de crecimiento en el conocimiento de la naturaleza tropical. La existencia de un grupo central de autores de gran éxito (en este caso en la Universidad de Abomey-Calavi) es similar a lo que se da en otros países africanos. Conclusión: Los científicos de Benín tienen una producción respetable, considerando el tamaño de la economía del país. Este país se beneficiaría de una mayor cooperación entre los investigadores locales, de una menor dependencia de pequeñas participaciones en megaproyectos internacionales, y de abrir la puerta a la investigación en áreas de innovación que pueden generar buenos dividendos a largo plazo, además de la investigación actual que solo se enfoca en resolver problemas inmediatos.

Fenton based treatments have received tremendous attention in the recent decades as viable strategies for soil and water remediation. There exist different processes associated to the Fenton oxidation. Efficiency, reaction chemistry, and environmental consequences of these processes vary according to the iron (Fe) activation techniques such as soluble Fe(II) (homogeneous Fenton process), soluble Fe(II) and chelating agent (modified-Fenton), Fe minerals or solids (heterogeneous Fenton), iron and UV light (photo-Fenton) and electro-Fenton oxidation. Despite immense amount of research articles and reviews related to the Fenton oxidation, no bibliometric study of this topic has been published to our knowledge. Bibliometric studies provide a useful means to track research output and scholarly trends in a field. Here, we conducted a bibliometric study of the publications on this theme (>4000 documents) published during the past three decades available from the Science Citation Index Expanded (SCI-EXPANDED) database of the Web of Science Core Collection (Clarivate Analytics). Based on the bibliometric analysis of 4349 documents, various essential research indicators were described such as the type and language of publications, the most prominent authors in this theme, the most impactful articles, research categories, journals, institutions, and the countries, that have made the greatest contribution to this theme along with potential research hotspots. This bibliometric study allowed visualization of the current landscape and future trends in this field to facilitate the future collaborative research and exchange of knowledge.

The highly cited publications in the Web of Science category of emergency medicine were identified and analysed. Articles that have been cited 100 or more times from Web of Science Core Collection since publication year to the end of 2019 were assessed regarding their distribution in indexed journals. Six publication indicators were applied to compare the publication performance of countries and institutes. The Y-index was applied to assess publication quantity and the characteristics of contribution to highly cited authors. Words used in the highly cited articles were analysed. Citation histories of the most frequently cited articles and the most impact articles were also compared. Results showed that the USA ranked top in the six publication indicators. The University of California Davis in the USA was the most independent institute.

Volatile organic compounds (VOCs) have caused global concerns due to their toxicity and chemical reactivity in photochemical air pollution. Scientific research on the VOCs has been increasing durin...

Contaminant bioaccumulation has long been used as a key indicator of the potential risk and toxic effects of contaminants to the environment and human health. In the present study, a bibliometric a...

The aim of this study is to identify and analyze the characteristics of the top – cited articles in the field of tribology based on the Science Citation Index Expanded (SCI – EXPANDED). The paramet...

Wind tunnels have been widely employed in aerodynamic research. To characterize the high impact research, a bibliometric analysis was conducted on highly cited articles related to wind tunnel based on the Science Citation Index Expanded (SCI-EXPANDED) database from 1900 to 2014. Articles with at least 100 citations from the Web of Science Core Collection were selected and analyzed in terms of publication years, authors, institutions, countries/territories, journals, Web of Science categories, and citation life cycles. The results show that a total of 77 highly cited articles in 37 journals were published between 1959 and 2008. Journal of Fluid Mechanics published the most of highly cited articles. The USA was the most productive country and most frequent partner of internationally collaboration. The prolific institutions were mainly located in the USA and UK. The authors who were both first author and corresponding author published 88% of the articles. The Y index was also deployed to evaluate the publication characteristics of authors. Moreover, the articles with high citations in both history and the latest year with their citation life cycles were examined to provide insights for high impact research. The highly cited articles were almost earliest wind tunnel experimental data and reports on their own research specialty, and thus attracted high citations. It was revealed that classic works of wind tunnel research was frequently occurred in 1990s but much less in 2000s, probably due to the development of numerical models of computational fluid dynamic (CFD) in recent decades.