Iron-based magnetic superconductors AEuFe4As4 (A= Rb, Cs): Natural superconductor-ferromagnet hybrids

2021 ◽  
Author(s):  
Ya-Bin Liu ◽  
Yi Liu ◽  
Guanghan Cao
Keyword(s):  
Magnetic Ordering ◽  
Research Progress ◽  
Future Research ◽  
Iron Based Superconductors ◽  
Main Research ◽  
The Past ◽  
Ferromagnetic Exchange ◽  
Iron Based ◽  
Superconducting Pairing ◽  
The Eu

Abstract Superconductivity (SC) and ferromagnetism (FM) are normally antagonistic, and their coexistence in a single crystalline material appears to be very rare. Over a decade ago, the iron-based pnictides of doped EuFe2As2 were found to render such a coexistence primarily because of the Fe-3d multiorbitals which simultaneously satisfy the superconducting pairing of Fe-3d electrons and the ferromagnetic exchange interaction among Eu local spins. In 2016, the discovery of the iron-based superconductors AEuFe4As4 (A= Rb, Cs) provided an additional and complementary material basis for the study of the coexistence and interplay between SC and FM. The two sibling compounds, which can be viewed as the intergrowth or hybrid between AFe2As2 and EuFe2As2, show SC in the FeAs bilayers at T c = 35 – 37 K, followed by a magnetic ordering at T m ∼ 15 K in the sandwiched Eu2+-ion sheets. Below T m, the Eu2+ spins align ferromagnetically within each Eu plane, making the system as a natural atomic-thick superconductor-ferromagnet superlattice. This paper reviews the main research progress in the emerging topic during the past five years, and an outlook for the future research opportunities is also presented.

scholarly journals Closing the Loops in Biomedical Informatics. Editorial

2009 ◽  
Vol 18 (01) ◽  
pp. 15-16
Author(s):  
Antoine Geissbuhler ◽  
C. A. Kulikowski
Keyword(s):  
Medical Informatics ◽  
Biomedical Research ◽  
Recent Literature ◽  
Biomedical Informatics ◽  
Research Progress ◽  
Editorial Introduction ◽  
Main Theme ◽  
Main Research ◽  
The Past

Summary Objectives To provide an editorial introduction to the 2009 IMIA Yearbook of Medical Informatics with an overview of its contents and contributors. Methods A brief overview of the main theme, and an outline of the purposes, contents, format, and acknowledgment of contributions for the 2009 IMIA Yearbook. Results This 2009 issue of the IMIA Yearbook highlights important, beneficial loops which, if closed, could lead to considerable advances in the field of biomedical informatics and, indirectly, in healthcare and biomedical research. Progress towards closing the loops and remaining gaps are identified from the recent literature, illustrated by selected papers published during the past 12 months. Conclusion Reviews and Surveys of the main research sub-fields in biomedical informatics in the Yearbook provide an overview of progress and current challenges across the spectrum of the discipline.

scholarly journals Trends in global research on sanitation: A 30-year perspective from 1990 to 2019

2020 ◽  
Author(s):  
Li Huang ◽  
Mi Zhou
Keyword(s):  
Developed Countries ◽  
Research Literature ◽  
Future Research ◽  
Relevant Research ◽  
Main Research ◽  
Sanitation Services ◽  
The Past ◽  
Sanitation And Hygiene ◽  
Main Determinants ◽  
New Research

In the past three decades, the field of sanitation has attracted much academic attention, and a large volume of relevant research results have emerged. In order to explore the characteristics and trends of global sanitation research literature, this paper presents a bibliometric analysis of 9559 articles published between 1990–2019 and extracted from the Web of Science Core Collection database. With the rapid increase in the number of related publications, both the breadth and depth of sanitation studies have increased significantly in the 21st century. In terms of multiple criteria, the comprehensive research strength of developed countries is greater than that of developing countries. The field is highly interdisciplinary, meaning that collaborations between research institutions are increasing. Keyword clustering analysis shows that the main research topics in the domain of sanitation are: (a) drinking water; (b) sustainability; (c) biofilm; (d) epidemiology; and (e) WaSH (i.e. Water, Sanitation and Hygiene). Meanwhile, keyword bursts analysis showed that the new research hotspots and frontiers mainly concentrated on: (a) sustainable development of sanitation services adapting to climate change; (b) main determinants affecting child malnutrition; (c) research based on global and multinational data; and (d) evaluations on various aspects of performance. This paper provides a better understanding of sanitation research trends that have emerged over the past 30 years, and can serve as a reference for future research.

scholarly journals A Scientometric Analysis of Worldwide Intercropping Research Based on Web of Science Database between 1992 and 2020

2021 ◽  
Vol 13 (5) ◽  
pp. 2430
Author(s):  
Wen Lv ◽  
Xining Zhao ◽  
Pute Wu ◽  
Jialong Lv ◽  
Hailong He
Keyword(s):  
Web Of Science ◽  
Agroforestry Systems ◽  
Future Research ◽  
Scientometric Analysis ◽  
Main Research ◽  
Research Status ◽  
The Past ◽  
The Usa ◽  
Number Of Citations ◽  
India And China

Intercropping has been practiced worldwide in both traditional and sustainable agriculture to feed the growing population. This study aims to analyze the research status and evolution of intercropping, to identify the influential authors, research centers, and articles, and to reveal the main research topics between 1992 and 2020 based on the Web of Science Core Collection database. The results show that the volume of publications in this field has increased rapidly over the past three decades. The analysis identifies the top three authors (i.e., Meine Van Noordwijk, Wenyu Yang, and Teja Tscharntke), top three contributing organizations (i.e., the World Agroforestry Center (ICRAF), the Chinese Academy of Science, and the INRA), and three most productive countries (i.e., the USA, India, and China). Co-occurrence analysis demonstrates that studies on intercropping can be divided into four clusters as centered by keywords of intercropping/maize, biodiversity/conservation, agroforestry, and carbon, respectively. Lal 2004 is the most influential study with the greatest number of citations and Agroforestry Systems is the most utilized journal. Perspectives on future studies were also given. This study helps researchers to clarify the current research status in the field of intercropping and put forward its future research.

scholarly journals Research progress on the application of feed additives in ruminal methane emission reduction: a review

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11151
Author(s):  
Kang Sun ◽  
Huihui Liu ◽  
Huiyu Fan ◽  
Ting Liu ◽  
Chen Zheng
Keyword(s):  
Plant Extracts ◽  
Emission Reduction ◽  
Production Efficiency ◽  
Methane Emissions ◽  
Feed Additives ◽  
Research Progress ◽  
Future Research ◽  
Negative Effects ◽  
The Past ◽  
Nitrogen Containing Compounds

Background Ruminal methane (CH4) emissions from ruminants not only pollute the environment and exacerbate the greenhouse effect, but also cause animal energy losses and low production efficiency. Consequently, it is necessary to find ways of reducing methane emissions in ruminants. Studies have reported that feed additives such as nitrogen-containing compounds, probiotics, prebiotics, and plant extracts significantly reduce ruminant methane; however, systematic reviews of such studies are lacking. The present article summarizes research over the past five years on the effects of nitrogen-containing compounds, probiotics, probiotics, and plant extracts on methane emissions in ruminants. The paper could provide theoretical support and guide future research in animal production and global warming mitigation. Methods This review uses the Web of Science database to search keywords related to ruminants and methane reduction in the past five years, and uses Sci-Hub, PubMed, etc. as auxiliary searchers. Read, filter, list, and summarize all the retrieved documents, and finally complete this article. Results Most of the extracts can not only significantly reduce CH4 greenhouse gas emissions, but they will not cause negative effects on animal and human health either. Therefore, this article reviews the mechanisms of CH4 production in ruminants and the application and effects of N-containing compounds, probiotics, prebiotics, and plant extracts on CH4 emission reduction in ruminants based on published studies over the past 5 years. Conclusion Our review provides a theoretical basis for future research and the application of feed additives in ruminant CH4 emission reduction activities.

scholarly journals A Review on Metal- and Metal Oxide-Based Nanozymes: Properties, Mechanisms, and Applications

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Qianwen Liu ◽  
Amin Zhang ◽  
Ruhao Wang ◽  
Qian Zhang ◽  
Daxiang Cui
Keyword(s):  
Metal Oxide ◽  
Catalytic Mechanism ◽  
Clinical Medicine ◽  
Low Cost ◽  
Rapid Development ◽  
Research Progress ◽  
Future Research ◽  
Chemical Production ◽  
The Past ◽  
Metal Oxide Nanomaterials

AbstractSince the ferromagnetic (Fe3O4) nanoparticles were firstly reported to exert enzyme-like activity in 2007, extensive research progress in nanozymes has been made with deep investigation of diverse nanozymes and rapid development of related nanotechnologies. As promising alternatives for natural enzymes, nanozymes have broadened the way toward clinical medicine, food safety, environmental monitoring, and chemical production. The past decade has witnessed the rapid development of metal- and metal oxide-based nanozymes owing to their remarkable physicochemical properties in parallel with low cost, high stability, and easy storage. It is widely known that the deep study of catalytic activities and mechanism sheds significant influence on the applications of nanozymes. This review digs into the characteristics and intrinsic properties of metal- and metal oxide-based nanozymes, especially emphasizing their catalytic mechanism and recent applications in biological analysis, relieving inflammation, antibacterial, and cancer therapy. We also conclude the present challenges and provide insights into the future research of nanozymes constituted of metal and metal oxide nanomaterials.

scholarly journals Research Progress in Organic Photomultiplication Photodetectors

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 713 ◽  
Author(s):  
Linlin Shi ◽  
Qiangbing Liang ◽  
Wenyan Wang ◽  
Ye Zhang ◽  
Guohui Li ◽  
...  
Keyword(s):  
Structural Design ◽  
Research Progress ◽  
Tunneling Effect ◽  
Future Research ◽  
The Past ◽  
Carrier Tunneling ◽  
Organic Devices ◽  
And Performance ◽  
Molecular Compounds ◽  
Made In

Organic photomultiplication photodetectors have attracted considerable research interest due to their extremely high external quantum efficiency and corresponding high detectivity. Significant progress has been made in the aspects of their structural design and performance improvement in the past few years. There are two types of organic photomultiplication photodetectors, which are made of organic small molecular compounds and polymers. In this paper, the research progress in each type of organic photomultiplication photodetectors based on the trap assisted carrier tunneling effect is reviewed in detail. In addition, other mechanisms for the photomultiplication processes in organic devices are introduced. Finally, the paper is summarized and the prospects of future research into organic photomultiplication photodetectors are discussed.

Recent advances in isopolyoxotungstates and their derivatives

2018 ◽  
Vol 74 (11) ◽  
pp. 1202-1221 ◽  
Author(s):  
Ya-Jie Liu ◽  
Meng-Tian Jin ◽  
Li-Juan Chen ◽  
Jun-Wei Zhao
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Final Section ◽  
Research Progress ◽  
Promising Direction ◽  
Main Research ◽  
The Past ◽  
The Future ◽  
Potential Applications ◽  
Metal Derivatives

During the past decade, isopolyoxotungstates (iso-POTs) and their derivatives have been greatly developed due to their unique structures and potential applications in luminescence, magnetism, catalysis etc. This brief review is principally focused on the main research progress on iso-POTs, iso-POT-based transition-metal derivatives, iso-POT-based rare-earth derivatives, iso-POT-based organometallic derivatives and iso-POT-based heterometallic derivatives, and gives a summary of some representative examples of their syntheses, structures and related properties. In addition, an outlook on the future of this area is presented in the final section. We believe that this systematic commentary on iso-POTs and their derivatives will not only disclose a rich set of iso-POT structures, but also reveal a more promising direction for the further functionalization of iso-POTs.

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