scholarly journals Recent Advances in Cyclonucleosides: C-Cyclonucleosides and Spore Photoproducts in Damaged DNA

Molecules ◽  
2012 ◽  
Vol 17 (10) ◽  
pp. 11630-11654 ◽  
Author(s):  
Yuichi Yoshimura ◽  
Hiroki Takahata
Keyword(s):  
Recent Progress ◽  
Carbon Chain ◽  
Biological Functions ◽  
Synthesis Mechanism ◽  
Recent Advances ◽  
Practical Synthesis ◽  
Spore Photoproduct ◽  
Points Of View ◽  
Derivatives Of ◽  
Damaged Dna

Cyclonucleosides which are fixed in a specific conformation around the glycosyl bond by a carbon and heteroatom chain constitute a unique category of nucleoside derivatives. Because they are structural analogs, cyclonucleosides and oligodeoxynucleotides containing them would be useful tools for investigating the biological functions and conformations of DNA, RNA as well as their steric interactions with proteins. C-Cyclonucleosides bridged by a carbon chain between the base and sugar moieties are the most attractive from the synthetic points of view as well as for use as biological tools. In this review, recent progress of the synthesis of C-cyclonucleosides is surveyed. Among the C-cyclonucleosides, 5′,8-C-cyclodeoxyadenosine is one of the well-known derivatives of which the first practical synthesis was reported over 30 years ago. Recently, 5′,8-C-cyclodeoxyadenosine has attracted considerable interest as a biomarker, since its formation in oxidatively-damaged DNA is considered to be related to various diseases and aging. Another important analogue of cyclonucleosides is a unique thymidine phosphate dimer, a so-called spore photoproduct, which has been found in photo-damaged DNA. Recent advances in the synthesis, mechanism-studies, and stereochemical preference of repairing enzymes related to 5′,8-C-cyclodeoxyadenosine and spore photoproducts are also reviewed.

Recent progress of MXenes and MXene-based nanomaterials for the electrocatalytic hydrogen evolution reaction

2021 ◽  
Author(s):  
Zhaoming Kang ◽  
Muhammad Arif Khan ◽  
Yanmei Gong ◽  
Rida Javed ◽  
Yuan Xu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Recent Progress ◽  
Recent Advances ◽  
Functional Mechanisms

In this review, recent advances in MXenes and MXene-based nanomaterials applied in HER electrocatalysis are overviewed in terms of their synthesis, characterization, functional mechanisms, and HERperformance/optimization.

Biomedical applications of methionine-based systems

2021 ◽  
Author(s):  
Jie Liu ◽  
Jun Huang ◽  
Peikun Xin ◽  
Guiting Liu ◽  
Jun Wu
Keyword(s):  
Liver Disease ◽  
Cancer Treatment ◽  
Biomedical Applications ◽  
Recent Progress ◽  
Functional Modification ◽  
Disease Therapy ◽  
Derivatives Of

Spurred by the structure, metabolism, and derivatives of methionine, this review systematically summarizes its recent progress in functional modification, cancer treatment, liver disease therapy.

Recent advances in graphene and its metal-oxide hybrid nanostructures for lithium-ion batteries

Nanoscale ◽  
2015 ◽  
Vol 7 (11) ◽  
pp. 4820-4868 ◽  
Author(s):  
Manish Srivastava ◽  
Jay Singh ◽  
Tapas Kuila ◽  
Rama K. Layek ◽  
Nam Hoon Kim ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Lithium Ion Batteries ◽  
Recent Progress ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Hybrid Nanostructures ◽  
Recent Advances

This review highlights the recent progress in graphene and graphene-based metal-oxide hybrids for use as electrode materials in lithium-ion batteries.

Recent Progress in σ-Bond Cross-Exchange Reactions to Access Diverse Silacycles

Synlett ◽  
2018 ◽  
Vol 29 (20) ◽  
pp. 2595-2600 ◽  
Author(s):  
Dongbing Zhao ◽  
Wen-Tao Zhao ◽  
Fang Gao
Keyword(s):  
Exchange Reaction ◽  
Recent Progress ◽  
Atom Economy ◽  
Exchange Reactions ◽  
Rapid Access ◽  
Recent Advances

The σ-bond cross-exchange reaction, which involves cleavage and subsequent exchange between different nonpolar σ-bonds, constitutes an attractive protocol for rapid access to organic skeletons with 100% atom economy. Herein, we give a brief summary of recent achievements in this approach for the synthesis of diverse silacycles, highlighting our recent advances in the first intermolecular σ-bond exchange between C–C bonds of cyclopropenones and C–Si bonds of (benzo)silacyclobutanes.1 Introduction2 σ-Bond Exchange-Reaction of Benzocyclobutanones to Silacycles3 σ-Bond Exchange-Reaction of Ethyl Cyclopropylideneacetates to Silacycles4 σ-Bond Exchange-Reaction of Cyclopropenones to Silacycles5 Conclusion

Recent progress in high-performance photo-detectors enabled by the pulsed laser deposition technology

2020 ◽  
Vol 8 (15) ◽  
pp. 4988-5014 ◽  
Author(s):  
Bing Wang ◽  
Zhi Bin Zhang ◽  
Shi Peng Zhong ◽  
Zhao Qiang Zheng ◽  
Ping Xu ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Future Development ◽  
High Performance ◽  
Recent Progress ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Development Trends ◽  
Recent Advances ◽  
Photo Detectors ◽  
Deposition Technology

This review introduces recent advances in the materials, fabrication and application of pulsed-laser deposition for high performance photo-detectors from an overall perspective. Challenges and future development trends are also discussed.

Recent progress in the mechanofluorochromism of distyrylanthracene derivatives with aggregation-induced emission

2018 ◽  
Vol 2 (9) ◽  
pp. 1595-1608 ◽  
Author(s):  
Juan Zhao ◽  
Zhihe Chi ◽  
Zhiyong Yang ◽  
Zhu Mao ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Recent Progress ◽  
Aggregation Induced Emission ◽  
Emission Properties ◽  
Recent Advances

A panoramic review of the recent advances in the mechanofluorochromism of distyrylanthracene derivatives with aggregation-induced emission properties.

scholarly journals Recent advances in the synthesis and application of Yb-based fluoride upconversion nanoparticles

2020 ◽  
Vol 7 (5) ◽  
pp. 1067-1081 ◽  
Author(s):  
Bing Chen ◽  
Feng Wang
Keyword(s):  
Recent Progress ◽  
Upconversion Nanoparticles ◽  
Recent Advances

This review focuses on recent progress in the development of Yb-based upconversion nanoparticles and their emerging technological applications.

scholarly journals Allyl type monomers for hard surface coating protection

2019 ◽  
Vol 140 ◽  
pp. 02007
Author(s):  
Larisa Popova ◽  
Anzhelika Tsyrulnikova ◽  
Sergey Vershilov ◽  
Julia Bazarnova ◽  
Ekaterina Aronova ◽  
...  
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Environmental Safety ◽  
Carbon Chain ◽  
High Yield ◽  
Main Reaction ◽  
Fibrous Materials ◽  
Series Of Experiments ◽  
Work Up ◽  
Derivatives Of ◽  
Improve Mass Transfer

Based on the unsaturated derivatives of polyfluoroalkanols chemical products are used to protect solid and fibrous materials surface from the effects of water, oils and other pollutants. A method for obtaining allyl ethers of polyfluoroalkanols (polyfluoroalkoxypropenes) is based on the Williamson ether reaction. This method is a heterophase process. The use of solvents to improve mass transfer requires complementary measures to ensure industrial and environmental safety. It is more preferable to obtain the target ethers in water with PTC. A series of experiments using different chain length polyfluoroalkanols was studied by GLC. Kovats retention indexes of the target ethers were determined. It was found that in the case of lower homologues (CF3CH2OH, (CF3)2CHOH, HCF2CF2CH2OH), the addition of 5-15 vol.% 1,4-dioxane as a solubilizer provides a high yield of products. The application of PTC (tetrabutylammonium bromide) is indispensable for using polyfluoroalkanols with a longer carbon chain (C≥5). PTC invariably provides the almost complete conversion of polyfluoroalkanols. The decomposition process of TBAB becomes noticeable (GLC method) upon completion of the main reaction. Polyfluoroalkoxypropenes form azeotrope with water, which can be used in the work up process.

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