Characteristics and Trends of C-H Activation Research: A Review of Literature

2018 ◽  
Vol 15 (6) ◽  
pp. 781-792 ◽  
Author(s):  
Yanqi Wu ◽  
Yuehua Wan ◽  
Fengzhi Zhang
Keyword(s):  
Method Development ◽  
American Chemical Society ◽  
Development Trend ◽  
Chemical Society ◽  
Research Field ◽  
Heterocycle Synthesis ◽  
The Usa ◽  
Leading Position ◽  
Author Keywords ◽  
International Edition

Background: C-H activation has attracted great interests over the past two decades, which resulted in an explosive growth in both quality and quantity of published papers related to this topic. Objective: In this review, a bibliometric analysis was performed to evaluate the publications in this field from 1996 to 2015 based on the Science Citation Index (SCI) Expanded database. This work presented a detailed overview of C-H activation from aspects of types of articles, citations, h-indices, languages, years, journals, institutions, countries and author keywords. Conclusion: The results showed that the USA took the leading position in this research field, followed by P. R. China and German. Chinese Academy of Science had the most publications and the highest h-index, Scripps Research Institute won the first place as far as the highest average citation per paper is concerned. Organometallics, Angewandte Chemie International Edition and Journal of the American Chemical Society were the most productive journals in this field, and Chemistry was the most frequently used subject category. Keywords analysis indicated that most research focused on the Palladium, Rhodium and Copper catalyzed cross-coupling synthetic method development for the heterocycle synthesis. The research about exploring the asymmetric C-H functionalization, mechanism investigation and solving the regioselectivity issue is the development trend in this area.

scholarly journals Energy Storage Ceramics: A Bibliometric Review of Literature

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3605
Author(s):  
Haiyan Hu ◽  
Aiping Liu ◽  
Yuehua Wan ◽  
Yuan Jing
Keyword(s):  
Energy Storage ◽  
Materials Science ◽  
Research Field ◽  
Highly Cited Papers ◽  
Research Areas ◽  
Productive Author ◽  
The Usa ◽  
Bibliometric Review ◽  
Leading Position ◽  
Highly Cited

Energy storage ceramics is among the most discussed topics in the field of energy research. A bibliometric analysis was carried out to evaluate energy storage ceramic publications between 2000 and 2020, based on the Web of Science (WOS) databases. This paper presents a detailed overview of energy storage ceramics research from aspects of document types, paper citations, h-indices, publish time, publications, institutions, countries/regions, research areas, highly cited papers, and keywords. A total of 3177 publications were identified after retrieval in WOS. The results show that China takes the leading position in this research field, followed by the USA and India. Xi An Jiao Tong Univ has the most publications, with the highest h-index. J.W. Zhai is the most productive author in energy storage ceramics research. Ceramics International, Journal of Materials Science-Materials in Electronics, and the Journal of Alloys and Compounds are the most productive journals in this field, and materials science—multidisciplinary is the most frequently used subject category. Keywords, highly cited papers, and the analysis of popular papers indicate that, in recent years, lead-free ceramics are prevalent, and researchers focus on fields such as the microstructure, thin films, and phase transition of ceramics.

Recent Research Trends on Bismuth Compounds in Cancer Chemoand Radiotherapy

2019 ◽  
Vol 26 (4) ◽  
pp. 729-759 ◽  
Author(s):  
Mateusz Kowalik ◽  
Joanna Masternak ◽  
Barbara Barszcz
Keyword(s):  
American Chemical Society ◽  
Chemical Society ◽  
Research Field ◽  
Research Trends ◽  
Future Research ◽  
Great Promise ◽  
Therapeutic Effects ◽  
Bismuth Compounds ◽  
Research On Application ◽  
Almost All

Background:Application of coordination chemistry in nanotechnology is a rapidly developing research field in medicine. Bismuth complexes have been widely used in biomedicine with satisfactory therapeutic effects, mostly in Helicobacter pylori eradication, but also as potential antimicrobial and anti-leishmanial agents. Additionally, in recent years, application of bismuth-based compounds as potent anticancer drugs has been studied extensively.Methods:Search for data connected with recent trends on bismuth compounds in cancer chemo- and radiotherapy was carried out using web-based literature searching tools such as ScienceDirect, Springer, Royal Society of Chemistry, American Chemical Society and Wiley. Pertinent literature is covered up to 2016.Results:In this review, based on 213 papers, we highlighted a number of current problems connected with: (i) characterization of bismuth complexes with selected thiosemicarbazone, hydrazone, and dithiocarbamate classes of ligands as potential chemotherapeutics. Literature results derived from 50 papers show that almost all bismuth compounds inhibit growth and proliferation of breast, colon, ovarian, lung, and other tumours; (ii) pioneering research on application of bismuth-based nanoparticles and nanodots for radiosensitization. Results show great promise for improvement in therapeutic efficacy of ionizing radiation in advanced radiotherapy (described in 36 papers); and (iii) research challenges in using bismuth radionuclides in targeted radioimmunotherapy, connected with choice of adequate radionuclide, targeting vector, proper bifunctional ligand and problems with 213Bi recoil daughters toxicity (derived from 92 papers).Conclusion:This review presents recent research trends on bismuth compounds in cancer chemo- and radiotherapy, suggesting directions for future research.

Global Emission Inventory Research Trends

2014 ◽  
Vol 1073-1076 ◽  
pp. 2728-2733
Author(s):  
Jing Wen Zhan ◽  
Lan Zhou Chen ◽  
Song Hong
Keyword(s):  
Emission Inventory ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
H Index ◽  
Global Emission ◽  
Subject Categories ◽  
The Usa ◽  
Leading Position ◽  
Author Keywords ◽  
Number Of Citations

The study used the bibiometric analysis to assess papers on emission inventory from 2001-2012, based on the SCIE and SSCI databases. The paper analyzed publication outputs, subject categories, major journals, authors’ outputs, geographic distribution of publications, international collaboration and author keywords. Our research identified a total of 5995 emission inventory-related publications during the period. Most of the papers related to emission inventory were published in journals linkd to the atmosphere. Streets, DG from Argonne National Laboratory contributed most in the research of emission inventory whose total papers, total citations, the average number of citations and H-index were all in the leading position. The USA, with the most independent and internationally collaborative papers, cooperated with China most. Global emission inventory research focused on life cycle assessment, greenhouse gases, models, remote sensing and so on, which may serve as a foundation for further research in emission inventory field.

Polysaccharide Structures in the Outer Mucilage of Arabidopsis Seeds Visualized by AFM

2020 ◽  
Author(s):  
MAK Williams ◽  
V Cornuault ◽  
AH Irani ◽  
VV Symonds ◽  
J Malmström ◽  
...  
Keyword(s):  
Average Length ◽  
American Chemical Society ◽  
Md Simulations ◽  
Chemical Society ◽  
Side Chains ◽  
Rhamnogalacturonan I ◽  
Afm Imaging ◽  
Minor Population ◽  
The Stability ◽  
A Minor

© 2020 American Chemical Society. Evidence is presented that the polysaccharide rhamnogalacturonan I (RGI) can be biosynthesized in remarkably organized branched configurations and surprisingly long versions and can self-assemble into a plethora of structures. AFM imaging has been applied to study the outer mucilage obtained from wild-type (WT) and mutant (bxl1-3 and cesa5-1) Arabidopsis thaliana seeds. For WT mucilage, ordered, multichain structures of the polysaccharide RGI were observed, with a helical twist visible in favorable circumstances. Molecular dynamics (MD) simulations demonstrated the stability of several possible multichain complexes and the possibility of twisted fibril formation. For bxl1-3 seeds, the imaged polymers clearly showed the presence of side chains. These were surprisingly regular and well organized with an average length of ∼100 nm and a spacing of ∼50 nm. The heights of the side chains imaged were suggestive of single polysaccharide chains, while the backbone was on average 4 times this height and showed regular height variations along its length consistent with models of multichain fibrils examined in MD. Finally, in mucilage extracts from cesa5-1 seeds, a minor population of chains in excess of 30 μm long was observed.

Recent Progress of Benzimidazole Hybrids for Anticancer Potential

2020 ◽  
Vol 27 (35) ◽  
pp. 5970-6014 ◽  
Author(s):  
Md. Jawaid Akhtar ◽  
Mohammad Shahar Yar ◽  
Vinod Kumar Sharma ◽  
Ahsan Ahmed Khan ◽  
Zulphikar Ali ◽  
...  
Keyword(s):  
Anticancer Agents ◽  
Biological Activities ◽  
Alkylating Agents ◽  
American Chemical Society ◽  
Chemical Society ◽  
Benzimidazole Derivatives ◽  
Progressive Development ◽  
Anticancer Properties ◽  
Naturally Occurring ◽  
Nitrogenous Base

This review presents the detailed account of factors leading to cancer and design strategy for the synthesis of benzimidazole derivatives as anticancer agents. The recent survey for cancer treatment in Cancer facts and figures 2017 American Chemical Society has shown progressive development in fighting cancer. Researchers all over the world in both developed and developing countries are in a continuous effort to tackle this serious concern. Benzimidazole and its derivatives showed a broad range of biological activities due to their resemblance with naturally occurring nitrogenous base i.e. purine. The review discussed benzimidazole derivatives showing anticancer properties through a different mechanism viz. intercalation, alkylating agents, topoisomerases, DHFR enzymes, and tubulin inhibitors. Benzimidazole derivatives act through a different mechanism and the substituents reported from the earlier and recent research articles are prerequisites for the synthesis of targeted based benzimidazole derivatives as anticancer agents. The review focuses on an easy comparison of the substituent essential for potency and selectivity through SAR presented in figures. This will further provide a better outlook or fulfills the challenges faced in the development of novel benzimidazole derivatives as anticancer.

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