scholarly journals Recent Advances in Functional Polymers Containing Coumarin Chromophores

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 56
Author(s):  
Ines Cazin ◽  
Elisabeth Rossegger ◽  
Gema Guedes de la Cruz ◽  
Thomas Griesser ◽  
Sandra Schlögl
Keyword(s):  
Polymer Networks ◽  
Cycloaddition Reaction ◽  
Functional Polymers ◽  
Future Application ◽  
Comprehensive Overview ◽  
Polymer Systems ◽  
Recent Developments ◽  
Photochemical Properties ◽  
Application Fields ◽  
Macromolecular Architecture

Natural and synthetic coumarin derivatives have gained increased attention in the design of functional polymers and polymer networks due to their unique optical, biological, and photochemical properties. This review provides a comprehensive overview over recent developments in macromolecular architecture and mainly covers examples from the literature published from 2004 to 2020. Along with a discussion on coumarin and its photochemical properties, we focus on polymers containing coumarin as a nonreactive moiety as well as polymer systems exploiting the dimerization and/or reversible nature of the [2πs + 2πs] cycloaddition reaction. Coumarin moieties undergo a reversible [2πs + 2πs] cycloaddition reaction upon irradiation with specific wavelengths in the UV region, which is applied to impart intrinsic healability, shape-memory, and reversible properties into polymers. In addition, coumarin chromophores are able to dimerize under the exposure to direct sunlight, which is a promising route for the synthesis and cross-linking of polymer systems under “green” and environment-friendly conditions. Along with the chemistry and design of coumarin functional polymers, we highlight various future application fields of coumarin containing polymers involving tissue engineering, drug delivery systems, soft robotics, or 4D printing applications.

scholarly journals A Review on Hydrogels with Photothermal Effect in Wound Healing and Bone Tissue Engineering

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2100
Author(s):  
Xu Zhang ◽  
Bowen Tan ◽  
Yanting Wu ◽  
Min Zhang ◽  
Jinfeng Liao
Keyword(s):  
Tissue Engineering ◽  
Wound Healing ◽  
Bone Regeneration ◽  
Controlled Drug Release ◽  
Multidrug Resistant ◽  
Future Application ◽  
Photothermal Effect ◽  
Resistant Bacteria ◽  
Promote Cell Proliferation ◽  
Recent Developments

Photothermal treatment (PTT) is a promising strategy to deal with multidrug-resistant bacteria infection and promote tissue regeneration. Previous studies demonstrated that hyperthermia can effectively inhibit the growth of bacteria, whereas mild heat can promote cell proliferation, further accelerating wound healing and bone regeneration. Especially, hydrogels with photothermal properties could achieve remotely controlled drug release. In this review, we introduce a photothermal agent hybrid in hydrogels for a photothermal effect. We also summarize the potential mechanisms of photothermal hydrogels regarding antibacterial action, angiogenesis, and osteogenesis. Furthermore, recent developments in photothermal hydrogels in wound healing and bone regeneration applications are introduced. Finally, future application of photothermal hydrogels is discussed. Hydrogels with photothermal effects provide a new direction for wound healing and bone regeneration, and this review will give a reference for the tissue engineering.

ACCIDENT AND DESIGN: RECOGNISING VICTIMS OF AGGRESSION IN INTERNATIONAL LAW

2021 ◽  
Vol 70 (1) ◽  
pp. 103-132
Author(s):  
Shane Darcy
Keyword(s):  
Human Rights ◽  
United Nations ◽  
International Law ◽  
International Criminal Court ◽  
International Criminal ◽  
Criminal Court ◽  
Future Application ◽  
Political Rights ◽  
Recent Developments ◽  
Civil And Political Rights

AbstractInternational law has not traditionally recognised individuals as victims of the crime of aggression. Recent developments may precipitate a departure from this approach. The activation of the jurisdiction of the International Criminal Court over the crime of aggression opens the way for the future application of the Court's regime of victim participation and reparation in the context of prosecutions for this crime. The determination by the United Nations Human Rights Committee in General Comment No. 36 that any deprivation of life resulting from an act of aggression violates Article 6 of the International Covenant on Civil and Political Rights serves to recognise a previously overlooked class of victims. This article explores these recent developments, by discussing their background, meaning and implications for international law and the rights of victims.

scholarly journals A Review: Electrospinning and Electrospinning Nanofibre Technology, Process & Application

2020 ◽  
Vol 5 (6) ◽  
pp. 528-538
Author(s):  
Somesh S. Bhagure ◽  
Dr. Adarsh R. Rao
Keyword(s):  
Electronic Devices ◽  
Early History ◽  
Comprehensive Overview ◽  
Thin Fiber ◽  
Filtration Membranes ◽  
Technology Process ◽  
Recent Developments ◽  
History Of ◽  
Catalytic Supports ◽  
Remarkable Progress

Electrospinning is a versatile and viable technique for ultra-thin fiber generation. Remarkable progress has been made with regard to the development of Electrospinning methods and the engineering of Electrospinning Nanofibre to suit or enable different applications. We aim to provide a comprehensive overview of Electrospinning, including principles, methods, materials and applications. We begin with a brief introduction to the early history of Electrospinning, followed by a discussion of its principle and its typical apparatus. Subsequently, we discuss the applications of electrospun Nanofibre, including their use as smart mattresses, filtration membranes, catalytic supports, energy harvesting / conversion / storage components, and photonic and electronic devices, as well as biomedical scaffolds. We highlight the most relevant and recent developments in the application of electrospun Nanofibre by focusing on the most representative examples.

scholarly journals Tribology of 2D Nanomaterials: A Review

2020 ◽  
Author(s):  
Paul С. Uzoma ◽  
Huan Hu ◽  
Mahdi Khadem ◽  
Oleksiy V. Penkov
Keyword(s):  
High Performance ◽  
2D Materials ◽  
Chemical Properties ◽  
Solid Lubricants ◽  
Friction Behavior ◽  
Comprehensive Overview ◽  
Wear Rates ◽  
Recent Developments ◽  
Frictional Coefficients ◽  
Physical And Chemical

The exfoliation of graphene has opened a new frontier in material science with a focus on 2D materials. The unique thermal, physical and chemical properties of these materials have made them one of the choicest candidates in novel mechanical and nano-electronic devices. Notably, 2D materials such as graphene, MoS2, WS2, h-BN, and Black Phosphorus have shown outstanding lowest frictional coefficients and wear rates, making them attractive materials for high-performance nano-lubricants and lubricating applications. The objective of this work is to provide a comprehensive overview of the most recent developments in the tribological potentials of 2D materials. At first, the essential physical, wear, and frictional characteristics of the 2D materials including their production techniques are discussed. Subsequently, the experimental explorations and theoretical simulations of the most common 2D materials are reviewed in regards to their tribological applications such as their use as solid lubricants and surface lubricant nano-additives. The effects of micro/nano textures on friction behavior are also reviewed. Finally, the current challenges in tribological applications of 2D materials and their prospects are discussed.

scholarly journals The Application of Chitosan Nanostructures in Stomatology

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6315
Author(s):  
Shunli Chu ◽  
Jue Wang ◽  
Fengxiang Gao
Keyword(s):  
Positive Charge ◽  
Antibacterial Properties ◽  
Drug Carriers ◽  
Natural Polymer ◽  
Hard Tissue ◽  
Recent Developments ◽  
Potential Applications ◽  
Soft Tissue Diseases ◽  
Application Fields ◽  
Dental Restorative

Chitosan (CS) is a natural polymer with a positive charge, a deacetylated derivative of chitin. Chitosan nanostructures (nano-CS) have received increasing interest due to their potential applications and remarkable properties. They offer advantages in stomatology due to their excellent biocompatibility, their antibacterial properties, and their biodegradability. Nano-CSs can be applied as drug carriers for soft tissue diseases, bone tissue engineering and dental hard tissue remineralization; furthermore, they have been used in endodontics due to their antibacterial properties; and, finally, nano-CS can improve the adhesion and mechanical properties of dental-restorative materials due to their physical blend and chemical combinations. In this review, recent developments in the application of nano-CS for stomatology are summarized, with an emphasis on nano-CS’s performance characteristics in different application fields. Moreover, the challenges posed by and the future trends in its application are assessed.

scholarly journals Data Envelopment Analysis in Energy and Environmental Economics: An Overview of the State-of-the-Art and Recent Development Trends

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2002 ◽  
Author(s):  
Abbas Mardani ◽  
Dalia Streimikiene ◽  
Tomas Balezentis ◽  
Muhamad Saman ◽  
Khalil Nor ◽  
...  
Keyword(s):  
Data Envelopment Analysis ◽  
Environmental Economics ◽  
Energy Economics ◽  
The State ◽  
Data Envelopment ◽  
Comprehensive Overview ◽  
Environmental Decision Making ◽  
Analytical Foundation ◽  
Dea Models ◽  
Application Fields

Measurement of environmental and energy economics presents an analytical foundation for environmental decision making and policy analysis. Applications of data envelopment analysis (DEA) models in the assessment of environmental and energy economics are increasing notably. The main objective of this review paper is to provide the comprehensive overview of the application of DEA models in the fields of environmental and energy economics. In this regard, a total 145 articles published in the high-quality international journals extracted from two important databases (Web of Science and Scopus) were selected for review. The 145 selected articles are reviewed and classified based on different criteria including author(s), application scheme, different DEA models, application fields, the name of journals and year of publication. This review article provided insights into the methodological and conceptualization study in the application of DEA models in the environmental and energy economics fields. This study should enable scholars and practitioners to understand the state of art of input and output indicators of DEA in the fields of environmental and energy economics.

scholarly journals Tribology of 2D Nanomaterials: A Review

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 897
Author(s):  
Paul C. Uzoma ◽  
Huan Hu ◽  
Mahdi Khadem ◽  
Oleksiy V. Penkov
Keyword(s):  
High Performance ◽  
2D Materials ◽  
Chemical Properties ◽  
Solid Lubricants ◽  
Friction Behavior ◽  
Comprehensive Overview ◽  
Wear Rates ◽  
Recent Developments ◽  
Frictional Coefficients ◽  
Physical And Chemical

The exfoliation of graphene has opened a new frontier in material science with a focus on 2D materials. The unique thermal, physical and chemical properties of these materials have made them one of the choicest candidates in novel mechanical and nano-electronic devices. Notably, 2D materials such as graphene, MoS2, WS2, h-BN and black phosphorus have shown outstanding lowest frictional coefficients and wear rates, making them attractive materials for high-performance nano-lubricants and lubricating applications. The objective of this work is to provide a comprehensive overview of the most recent developments in the tribological potentials of 2D materials. At first, the essential physical, wear and frictional characteristics of the 2D materials including their production techniques are discussed. Subsequently, the experimental explorations and theoretical simulations of the most common 2D materials are reviewed in regards to their tribological applications such as their use as solid lubricants and surface lubricant nano-additives. The effects of micro/nano textures on friction behavior are also reviewed. Finally, the current challenges in tribological applications of 2D materials and their prospects are discussed.

Deep Learning: The Good, the Bad, and the Ugly

2019 ◽  
Vol 5 (1) ◽  
pp. 399-426 ◽  
Author(s):  
Thomas Serre
Keyword(s):  
Machine Learning ◽  
Deep Learning ◽  
Machine Vision ◽  
Artificial Vision ◽  
Vision Systems ◽  
Comprehensive Overview ◽  
Biological Vision ◽  
Recent Developments ◽  
Visual Intelligence ◽  
Modern Machine

Artificial vision has often been described as one of the key remaining challenges to be solved before machines can act intelligently. Recent developments in a branch of machine learning known as deep learning have catalyzed impressive gains in machine vision—giving a sense that the problem of vision is getting closer to being solved. The goal of this review is to provide a comprehensive overview of recent deep learning developments and to critically assess actual progress toward achieving human-level visual intelligence. I discuss the implications of the successes and limitations of modern machine vision algorithms for biological vision and the prospect for neuroscience to inform the design of future artificial vision systems.

scholarly journals Optical Camera Communications: Principles, Modulations, Potential and Challenges

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1339
Author(s):  
Willy Anugrah Cahyadi ◽  
Yeon Ho Chung ◽  
Zabih Ghassemlooy ◽  
Navid Bani Hassan
Keyword(s):  
Performance Enhancement ◽  
Cost Effective ◽  
Smart Devices ◽  
Future Research ◽  
Light Sources ◽  
Visible Light Communications ◽  
Comprehensive Overview ◽  
Optical Wireless Communications ◽  
Recent Developments ◽  
Technical Issues

Optical wireless communications (OWC) are emerging as cost-effective and practical solutions to the congested radio frequency-based wireless technologies. As part of OWC, optical camera communications (OCC) have become very attractive, considering recent developments in cameras and the use of fitted cameras in smart devices. OCC together with visible light communications (VLC) is considered within the framework of the IEEE 802.15.7m standardization. OCCs based on both organic and inorganic light sources as well as cameras are being considered for low-rate transmissions and localization in indoor as well as outdoor short-range applications and within the framework of the IEEE 802.15.7m standardization together with VLC. This paper introduces the underlying principles of OCC and gives a comprehensive overview of this emerging technology with recent standardization activities in OCC. It also outlines the key technical issues such as mobility, coverage, interference, performance enhancement, etc. Future research directions and open issues are also presented.

Definitions of terms relating to reactions of polymers and to functional polymeric materials (IUPAC Recommendations 2003)

2004 ◽  
Vol 76 (4) ◽  
pp. 889-906 ◽  
Author(s):  
K. Horie ◽  
Máximo Barón ◽  
R. B. Fox ◽  
J. He ◽  
M. Hess ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Polymeric Materials ◽  
Functional Polymers ◽  
Polymer Systems ◽  
The Third ◽  
Polymer Reactions

The document defines the terms most commonly encountered in the field of polymer reactions and functional polymers. The scope has been limited to terms that are specific to polymer systems. The document is organized into three sections. The first defines the terms relating to reactions of polymers. Names of individual chemical reactions are omitted from the document, even in cases where the reactions are important in the field of polymer reactions. The second section defines the terms relating to polymer reactants and reactive polymeric materials. The third section defines the terms describing functional polymeric materials.

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