Biocatalysis of carboxylic acid reductases: phylogenesis, catalytic mechanism and potential applications

2018 ◽  
Vol 20 (4) ◽  
pp. 777-792 ◽  
Author(s):  
Ge Qu ◽  
Jinggong Guo ◽  
Dameng Yang ◽  
Zhoutong Sun
Keyword(s):  
Carboxylic Acid ◽  
Catalytic Mechanism ◽  
Practical Applications ◽  
Recent Advances ◽  
Potential Applications ◽  
Cascade Processes

Recent advances in carboxylic acid reductases and their practical applications in bio-cascade processes.

scholarly journals Recent Advances in Fabrication of Flexible, Thermochromic Vanadium Dioxide Films for Smart Windows

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2674
Author(s):  
Jongbae Kim ◽  
Taejong Paik
Keyword(s):  
Thin Films ◽  
Energy Saving ◽  
Near Infrared ◽  
Solar Spectrum ◽  
Smart Windows ◽  
Space Group ◽  
Practical Applications ◽  
Flexible Polymer ◽  
Recent Advances ◽  
Potential Applications

Monoclinic-phase VO2 (VO2(M)) has been extensively studied for use in energy-saving smart windows owing to its reversible insulator–metal transition property. At the critical temperature (Tc = 68 °C), the insulating VO2(M) (space group P21/c) is transformed into metallic rutile VO2 (VO2(R) space group P42/mnm). VO2(M) exhibits high transmittance in the near-infrared (NIR) wavelength; however, the NIR transmittance decreases significantly after phase transition into VO2(R) at a higher Tc, which obstructs the infrared radiation in the solar spectrum and aids in managing the indoor temperature without requiring an external power supply. Recently, the fabrication of flexible thermochromic VO2(M) thin films has also attracted considerable attention. These flexible films exhibit considerable potential for practical applications because they can be promptly applied to windows in existing buildings and easily integrated into curved surfaces, such as windshields and other automotive windows. Furthermore, flexible VO2(M) thin films fabricated on microscales are potentially applicable in optical actuators and switches. However, most of the existing fabrication methods of phase-pure VO2(M) thin films involve chamber-based deposition, which typically require a high-temperature deposition or calcination process. In this case, flexible polymer substrates cannot be used owing to the low-thermal-resistance condition in the process, which limits the utilization of flexible smart windows in several emerging applications. In this review, we focus on recent advances in the fabrication methods of flexible thermochromic VO2(M) thin films using vacuum deposition methods and solution-based processes and discuss the optical properties of these flexible VO2(M) thin films for potential applications in energy-saving smart windows and several other emerging technologies.

scholarly journals Recent Advances in the Chemical Biology of N-Glycans

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1040
Author(s):  
Asuka Shirakawa ◽  
Yoshiyuki Manabe ◽  
Koichi Fukase
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Molecular Basis ◽  
Chemical Biology ◽  
Molecular Level ◽  
Chemoenzymatic Synthesis ◽  
Complex Structures ◽  
Recent Advances ◽  
Protein Functions ◽  
Potential Applications

Asparagine-linked N-glycans on proteins have diverse structures, and their functions vary according to their structures. In recent years, it has become possible to obtain high quantities of N-glycans via isolation and chemical/enzymatic/chemoenzymatic synthesis. This has allowed for progress in the elucidation of N-glycan functions at the molecular level. Interaction analyses with lectins by glycan arrays or nuclear magnetic resonance (NMR) using various N-glycans have revealed the molecular basis for the recognition of complex structures of N-glycans. Preparation of proteins modified with homogeneous N-glycans revealed the influence of N-glycan modifications on protein functions. Furthermore, N-glycans have potential applications in drug development. This review discusses recent advances in the chemical biology of N-glycans.

Transition metal oxide and chalcogenide-based nanomaterials for antibacterial activities: an overview

Nanoscale ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 6373-6388
Author(s):  
Yanan Tang ◽  
Zhen Qin ◽  
Shengyan Yin ◽  
Hang Sun
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Transition Metal Oxide ◽  
Antibacterial Activities ◽  
Practical Applications ◽  
Recent Advances

This review summarizes the recent advances of transition metal oxide and chalcogenide-based antibacterial nanomaterials, with emphasis on their inactivation mechanisms and highlighting their practical applications.

Recent advances in emerging nonaqueous K-ion batteries: from mechanistic insights to practical applications

2021 ◽  
Author(s):  
Mingyue Wang ◽  
Hongming Zhang ◽  
Jiang Cui ◽  
Shanshan Yao ◽  
Xi Shen ◽  
...  
Keyword(s):  
Practical Applications ◽  
Recent Advances

scholarly journals 3-Arylaziridine-2-carboxylic Acid Derivatives and (3-Arylaziridin-2-yl)ketones: The Aziridination Approaches

2021 ◽  
Vol 22 (18) ◽  
pp. 9861
Author(s):  
Boriss Strumfs ◽  
Romans Uljanovs ◽  
Kirils Velikijs ◽  
Peteris Trapencieris ◽  
Ilze Strumfa
Keyword(s):  
Carboxylic Acid ◽  
Carbonyl Compounds ◽  
Synthetic Chemistry ◽  
Significant Progress ◽  
Current Review ◽  
Recent Advances ◽  
Year 2000

Aziridination reactions represent a powerful tool in aziridine synthesis. Significant progress has been achieved in this field in the last decades, whereas highly functionalized aziridines including 3-arylated aziridine-2-carbonyl compounds play an important role in both medical and synthetic chemistry. For the reasons listed, in the current review we have focused on the ways to obtain 3-arylated aziridines and on the recent advances (mainly since the year 2000) in the methodology of the synthesis of these compounds via aziridination.

Recent advances in cyclohydrocarbonylation reactions

2005 ◽  
Vol 83 (6-7) ◽  
pp. 681-692 ◽  
Author(s):  
Wen-Hua Chiou ◽  
Seung-Yub Lee ◽  
Iwao Ojima
Keyword(s):  
Transition Metal Complexes ◽  
Relevant Literature ◽  
Cascade Process ◽  
One Pot ◽  
Polycyclic Compounds ◽  
Carbon Nucleophiles ◽  
Recent Advances ◽  
Carbocyclic Compounds ◽  
Cascade Processes ◽  
One Step

This article describes recent advances in the cyclohydrocarbonylation reactions catalyzed by transition-metal complexes and their applications in organic synthesis as a review covering the relevant literature up to the middle of 2004. The reactions are categorized into four types, i.e., intramolecular amidocarbonylation reactions, intramolecular aminocarbonylation reactions, cyclohydrocarbonylation reactions involving carbon–nucleophiles, and other cyclohydrocarbonylation reactions. Cyclohydrocarbonylation reactions provide efficient routes to various monocyclic, bicyclic, and polycyclic compounds as a one-step cascade process or a one-pot process. Reaction mechanisms for these cascade processes are discussed as needed for clarification. The heterocyclic and carbocyclic compounds, thus obtained, can be further transformed to specific targets. Examples of such applications are also discussed.Key words: catalysis, cyclohydrocarbonylation, hydroformylation, amidocarbonylation, cyclization, regioselectivity, aldehydes, regioselective, cascade, heterocycles, rhodium.

scholarly journals Direct Transamidation Reactions: Mechanism and Recent Advances

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2382 ◽  
Author(s):  
Paola Acosta-Guzmán ◽  
Alejandra Mateus-Gómez ◽  
Diego Gamba-Sánchez
Keyword(s):  
Carboxylic Acid ◽  
Chemical Industry ◽  
Metal Catalysts ◽  
Direct Reaction ◽  
Valuable Alternative ◽  
Recent Advances ◽  
Other Substances ◽  
Recent Developments ◽  
Nitrogen Nucleophiles ◽  
Reactions Mechanism

Amides are undeniably some of the most important compounds in Nature and the chemical industry, being present in biomolecules, materials, pharmaceuticals and many other substances. Unfortunately, the traditional synthesis of amides suffers from some important drawbacks, principally the use of stoichiometric activators or the need to use highly reactive carboxylic acid derivatives. In recent years, the transamidation reaction has emerged as a valuable alternative to prepare amides. The reactivity of amides makes their direct reaction with nitrogen nucleophiles difficult; thus, the direct transamidation reaction needs a catalyst in order to activate the amide moiety and to promote the completion of the reaction because equilibrium is established. In this review, we present research on direct transamidation reactions ranging from studies of the mechanism to the recent developments of more applicable and versatile methodologies, emphasizing those reactions involving activation with metal catalysts.

Recent advances in the construction of cyclic grafted polymers and their potential applications

2018 ◽  
Vol 9 (6) ◽  
pp. 677-686 ◽  
Author(s):  
Shuangshuang Zhang ◽  
Yasuyuki Tezuka ◽  
Zhengbiao Zhang ◽  
Na Li ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Grafted Polymers ◽  
Recent Advances ◽  
Potential Applications ◽  
Grafting Through ◽  
Grafting From ◽  
Grafting Onto

Three main strategies used for the construction of cyclic grafted polymers, “grafting through”, “grafting onto”, and “grafting from”, are summarized.

Analytical Review of Biometric Technology Employing Vivid Modalities

2021 ◽  
pp. 2250004
Author(s):  
Vandana ◽  
Navdeep Kaur
Keyword(s):  
Security And Privacy ◽  
Future Research ◽  
Multimodal Biometrics ◽  
Biometric Technology ◽  
Practical Applications ◽  
Biometric Systems ◽  
Potential Applications ◽  
Analytical Review ◽  
Comprehensive Survey ◽  
Technology Market

The digitalization has been challenged with the security and privacy aspects in each and every field. In addition to numerous authentication methods, biometrics has been popularized as it relies on one’s individual behavioral and physical characters. In this context, numerous unimodal and multimodal biometrics have been proposed and tested in the last decade. In this paper, authors have presented a comprehensive survey of the existing biometric systems while highlighting their respective challenges, advantage and limitations. The paper also discusses the present biometric technology market value, its scope, and practical applications in vivid sectors. The goal of this review is to offer a compact outline of various advances in biometrics technology with potential applications using unimodal and multimodal bioinformatics are discussed that would prove to offer a base for any biometric-based future research.

Sign in / Sign up

Export Citation Format

Share Document