scholarly journals Biopolymer Nanofibers for Nanogenerator Development

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Lulu Bai ◽  
Qing Li ◽  
Ya Yang ◽  
Shengjie Ling ◽  
Haipeng Yu ◽  
...  
Keyword(s):  
Renewable Resources ◽  
Building Blocks ◽  
Bulk Materials ◽  
Sustainable Building ◽  
Novel Materials ◽  
Future Developments ◽  
The Past ◽  
Recent Advances ◽  
Structures And Properties ◽  
Personal Perspectives

The development of nanogenerators (NGs) with optimal performances and functionalities requires more novel materials. Over the past decade, biopolymer nanofibers (BPNFs) have become critical sustainable building blocks in energy-related fields because they have distinctive nanostructures and properties and can be obtained from abundant and renewable resources. This review summarizes recent advances in the use of BPNFs for NG development. We will begin by introducing various strategies for fabricating BPNFs with diverse structures and performances. Then, we will systematically present the utilization of polysaccharide and protein nanofibers for NGs. We will mainly focus on the use of BPNFs to generate bulk materials with tailored structures and properties for assembling of triboelectric and piezoelectric NGs. The use of BPNFs to construct NGs for the generation of electricity from moisture and osmosis is also discussed. Finally, we illustrate our personal perspectives on several issues that require special attention with regard to future developments in this active field.

scholarly journals Recent Advances in Palladium-Catalyzed Isocyanide Insertions

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 4906
Author(s):  
Jurriën W. Collet ◽  
Thomas R. Roose ◽  
Bram Weijers ◽  
Bert U. W. Maes ◽  
Eelco Ruijter ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Building Blocks ◽  
Insertion Reactions ◽  
Chemical Reagents ◽  
The Past ◽  
Recent Advances ◽  
Recent Developments ◽  
Palladium Catalyzed ◽  
Made In ◽  
Rapid Incorporation

Isocyanides have long been known as versatile chemical reagents in organic synthesis. Their ambivalent nature also allows them to function as a CO-substitute in palladium-catalyzed cross couplings. Over the past decades, isocyanides have emerged as practical and versatile C1 building blocks, whose inherent N-substitution allows for the rapid incorporation of nitrogeneous fragments in a wide variety of products. Recent developments in palladium catalyzed isocyanide insertion reactions have significantly expanded the scope and applicability of these imidoylative cross-couplings. This review highlights the advances made in this field over the past eight years.

scholarly journals Protein nanofibrils and their use as building blocks of sustainable materials

RSC Advances ◽  
2021 ◽  
Vol 11 (62) ◽  
pp. 39188-39215
Author(s):  
Christofer Lendel ◽  
Niclas Solin
Keyword(s):  
Sustainable Development ◽  
Renewable Resources ◽  
Building Blocks ◽  
Novel Materials ◽  
Sustainable Materials

Protein nanofibrils produced from renewable resources provide opportunities to create novel materials for sustainable development.

scholarly journals Progress in Carbon Nanotube-Based Electrochemical Biosensors – A Review

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
A.T. Lawal ◽  
H.S. Bolarinwa ◽  
L.O. Animasahun ◽  
M.D. Adeoye ◽  
I.O. Abdulsalami ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ascorbic Acid ◽  
Uric Acid ◽  
Carbon Nanotube ◽  
Metal Ions ◽  
Synthetic Methods ◽  
Electrochemical Biosensors ◽  
Future Developments ◽  
The Past ◽  
Structures And Properties

The use of carbon nanotubes (CNT) for fabrication of sensors and biosensors has increased considerably over the past decade. This review covers the progress and advances made during the years (2014-2018) in the utilisation of carbon nanotubes for fabrication of electrochemical biosensors. The focus of the review is on reported CNT-based biosensors for detection of, important substances, such as glucose, H2O2, (DNA), ascorbic acid, uric acid, dopamine, metal ions, and pesticides. The review starts by first discussing the structures and properties of CNTs, followed by discussion of some of the synthetic methods for CNTs preparation. The working principles and performances of CNT-based biosensors are then discussed. Considerations for future developments in CNT-based biosensors are also outlined.

scholarly journals China's flourishing synthetic organofluorine chemistry: innovations in the new millennium

2017 ◽  
Vol 4 (3) ◽  
pp. 303-325 ◽  
Author(s):  
Qinghe Liu ◽  
Chuanfa Ni ◽  
Jinbo Hu
Keyword(s):  
Future Development ◽  
Bond Activation ◽  
Rapid Development ◽  
Building Blocks ◽  
Fluorinated Building Blocks ◽  
Recent Advances ◽  
The World ◽  
The Future ◽  
Personal Perspectives ◽  
New Millennium

Abstract The new millennium has witnessed the rapid development of synthetic organofluorine chemistry all over the world, and chemists in China have made significant contributions in this field. This review aims to provide a brief introduction to China's primary innovations from 2000 to early 2017, covering fluorination, fluoroalkylation, fluoromethylthiolation, fluoroolefination and polyfluoroarylation, as well as synthesis with fluorinated building blocks. Recent advances in the chemistry of difluorocarbene and the chemistry of carbon–fluorine bond activation are also discussed. As a conclusion, the review ends with some personal perspectives on the future development of China's synthetic organofluorine chemistry.

Recent Advances in Green Composites

2010 ◽  
Vol 425 ◽  
pp. 107-166 ◽  
Author(s):  
George Gejo ◽  
Joseph Kuruvilla ◽  
Abderrahim Boudenne ◽  
Thomas Sabu
Keyword(s):  
Biodegradable Polymers ◽  
Renewable Resources ◽  
Natural Fiber ◽  
Fiber Development ◽  
Review Article ◽  
Green Composites ◽  
The Past ◽  
Recent Advances ◽  
Recent Developments ◽  
Food Market

This review aims at reporting on very recent developments in the, properties and applications of Green Composites. One very important aspect of green composites is that they can be designed and tailored to meet different requirements. Recent advances in natural fiber development offer significant oppurtunities for improved materials from renewable resources. Biocomposites offer a significant non-food market for crop-derived fibres and resins. Considerable growth has been seen in the use of biocomposites in the automotive and decking markets over the past decade or so, but application in other sectors has hitherto been limited. Recent developments of different biodegradable polymers and biocomposites are discussed in this review article.

DNA-Based Bulk Hydrogel Materials and Biomedical Application

2015 ◽  
Vol 6 (4) ◽  
Author(s):  
Yanmin Gao ◽  
Hao Qi
Keyword(s):  
Material Science ◽  
Biomedical Application ◽  
Natural Polymer ◽  
Bulk Materials ◽  
Novel Materials ◽  
The Past

Being a natural polymer, DNA attracts extensive attention and possesses great potential to open a new way for researches of biomedical or material science. In the past few decades, approaches have been developed to bring DNA into the realm of bulk materials. In this review, we discussed the progresses achieved for fabrication of novel materials with a large physical dimension from the DNA polymer.

Tertiary Enamides: Versatile and Available Substrates in Synthetic Chemistry

2019 ◽  
Vol 16 (1) ◽  
pp. 70-97 ◽  
Author(s):  
Xiaohua Cai ◽  
Mengzhi Yang ◽  
Hui Guo
Keyword(s):  
Chemical Reaction ◽  
Coupling Reaction ◽  
Building Blocks ◽  
Synthetic Chemistry ◽  
The Past ◽  
Recent Advances ◽  
Complex Building ◽  
Group A ◽  
Unique Stability ◽  
Made In

Background: Enamines and their variant enamides as powerful and versatile synthons have attracted great attention in synthetic chemistry. Enamides display unique stability and reduce enaminic reactivity in view of the electron-withdrawing effect of N-acyl group. A great deal of satisfactory achievements in the synthesis and application of enamides has been made in recent years. Especially, tertiary enamides without N-H bond regarded as low reactivity of compounds in the past can act as excellent nucleophiles to react with electrophiles for the construction of various nitrous molecules. </P><P> Objective: This review focuses on recent advances on tertiary enamides in the synthetic strategies and applications including addition, coupling reaction, functionalization and electro- or photo-chemical reaction. Conclusion: Tertiary enamides as electron-deficient nucleophiles display a satisfactory balance between stability and reactivity to offer multiple opportunities for the construction of various functionalized nitrogencontaining compounds. Further exploration of the reactive mechanisms involved tertiary enamides and the development of novel and efficient transformations to generate ever more complex building blocks starting from tertiary enamides are particularly worth pursuing.

scholarly journals Recent advances in the synthesis of biodegradable polyesters by sustainable polymerization: lipase-catalyzed polymerization

RSC Advances ◽  
2020 ◽  
Vol 10 (59) ◽  
pp. 36230-36240
Author(s):  
Ying Liu ◽  
Lijie Song ◽  
Na Feng ◽  
Wei Jiang ◽  
Yongri Jin ◽  
...  
Keyword(s):  
Polymeric Materials ◽  
Enzymatic Polymerization ◽  
Biodegradable Polyesters ◽  
The Past ◽  
Recent Advances ◽  
Structures And Properties ◽  
Catalyzed Polymerization

Over the past three decades, enzymatic polymerization has dramatically developed and gradually broadened as a creative methodology in the construction of polymeric materials with tailor-made structures and properties.

Five Years and Count(er)ing: Memoir after Memoir

CounterText ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 26-32
Author(s):  
Norbert Bugeja
Keyword(s):  
Guest Editor ◽  
Arab Countries ◽  
National Museum ◽  
Terror Attack ◽  
Special Issue ◽  
The Past ◽  
Personal Perspectives ◽  
The Moment ◽  
Ongoing Project

In this retrospective piece, the Guest Editor of the first number of CounterText (a special issue titled Postcolonial Springs) looks back at the past five years from various scholarly and personal perspectives. He places particular focus on an event that took place mid-way between the 2011 uprisings across a number of Arab countries and the moment of writing: the March 2015 terror attack on the Bardo National Museum in Tunis, which killed twenty-two people and had a profound effect on Tunisian popular consciousness and that of the post-2011 Arab nations. In this context, the author argues for a renewed perspective on memoir as at once a memorial practice and a political gesture in writing, one that exceeds concerns of genre and form to encompass an ongoing project of political re-cognition following events that continue to remap the agenda for the region. The piece makes a brief final pitch for Europe's need to re-cognise, within those modes of ‘articulacy-in-difficulty’ active on its southern borders, specific answers to its own present quandaries.

The Evolution of Lead Extraction

2009 ◽  
Vol 5 (1) ◽  
pp. 32
Author(s):  
Melanie Maytin ◽  
Laurence M Epstein ◽  
◽  
Keyword(s):  
Natural Selection ◽  
Lead Extraction ◽  
Significant Morbidity ◽  
Extraction Techniques ◽  
Extraction Technology ◽  
Device Management ◽  
Future Developments ◽  
The Past ◽  
New Methods ◽  
Life Threatening

Prior to the introduction of successful intravascular countertraction techniques, options for lead extraction were limited and dedicated tools were non-existent. The significant morbidity and mortality associated with these early extraction techniques limited their application to life-threatening situations such as infection and sepsis. The past 30 years have witnessed significant advances in lead extraction technology, resulting in safer and more efficacious techniques and tools. This evolution occurred out of necessity, similar to the pressure of natural selection weeding out the ineffective and highly morbid techniques while fostering the development of safe, successful and more simple methods. Future developments in lead extraction are likely to focus on new tools that will allow us to provide comprehensive device management and the design of new leads conceived to facilitate future extraction. With the development of these new methods and novel tools, the technique of lead extraction will continue to require operators that are well versed in several methods of extraction. Garnering new skills while remembering the lessons of the past will enable extraction technologies to advance without repeating previous mistakes.

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