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Strong Local Coordination Structure Effects on Subnanometer PtOx Clusters over CeO2 Nanowires Probed by Low-Temperature CO Oxidation

In this work, we report the strong effects of local coordination structures on the catalytic activity of subnanometric PtOx clusters over CeO2 nanowires in low-temperature CO oxidation as a probe reaction. 17-09-2015
　　A fundamental understanding of the structural effects of supported metal catalysts at the molecular level is extremely important for developing high-performance catalysts that are widely used in industry, which is still a longstanding attractive but challenging topic in multidisciplinary fields. In this work, we report the strong effects of local coordination structures on the catalytic activity of subnanometric PtOx clusters over CeO2 nanowires in low-temperature CO oxidation ...

09 17 , 2015
Multiply Confined Nickel Nanocatalysts Produced by Atomic Layer Deposition for Hydrogenation Reactions

To design highly efficient catalysts, new concepts for optimizing the metal–support interactions are desirable. Here we introduce a facile and general template approach assisted by atomic layer deposition (ALD), to fabricate a multiply confined Ni-based nanocatalyst. 01-09-2015
　　To design highly efficient catalysts, new concepts for optimizing the metal–support interactions are desirable. Here we introduce a facile and general template approach assisted by atomic layer deposition (ALD), to fabricate a multiply confined Ni-based nanocatalyst. The Ni nanoparticles are not only confined in Al2O3 nanotubes, but also embedded in the cavities of Al2O3 interior wall. The cavities create more Ni–Al2O3 interfacial sites, which facilitate hydroge...

09 01 , 2015
Heterovalent-Doping-Enabled Efficient Dopant Luminescence and Controllable Electronic Impurity Via a New Strategy of Preparing II-VI Nanocrystals

Substitutional heterovalent doping represents an effective method to control the optical and electronic properties of nanocrystals (NCs). Here, highly monodisperse II-VI NCs with deep substitutional dopants are presented. 20-04-2015
　　Substitutional heterovalent doping represents an effective method to control the optical and electronic properties of nanocrystals (NCs). Here, highly monodisperse II−VI NCs with deep substitutional dopants are presented. The NCs exhibit stable, dominant, and strong dopant fluorescence, and control over n- and p-type electronic impurities has been achieved. Large-scale, bottom-up superlattices of the NCs will speed up their application in electronic devices. The resear...

05 22 , 2015
FtsZ Protofilaments Use a Hinge-Opening Mechanism for Constrictive Force Generation

The essential bacterial protein FtsZ is a guanosine triphosphatase that self-assembles into a structure at the division site termed the “Z ring”. During cytokinesis, the Z ring exerts a constrictive force on the membrane by using the chemical energy of guanosine triphosphate hydrolysis. 24-09-2013
　　The essential bacterial protein FtsZ is a guanosine triphosphatase that self-assembles into a structure at the division
　　site termed the “Z ring”. During cytokinesis, the Z ring exerts a constrictive force on the membrane by using the
　　chemical energy of guanosine triphosphate hydrolysis. However, the structural basis of this constriction remains
　　unresolved. Here, we present the crystal structure of a guanosine diphosphate–boundMycobacterium tuberculosis
　　FtsZ p...

09 24 , 2013
Structures and Receptor Binding of Hemagglutinins from Human-Infecting H7N9 Influenza Viruses

An avian-origin human-infecting influenza (H7N9) virus has recently been identified in China. Here, we have evaluated the viral hemagglutinin (HA) receptor binding properties from two human H7N9 isolates, A/Shanghai/1/2013 (SH-H7N9) (containing the avian-signature Q226) and A/Anhui/1/2013 (AH-H7N9) (containing the mammalian-signature L226). 13-09-2013
　　An avian-origin human-infecting influenza (H7N9) virus has recently been identified in China. Here, we have
　　evaluated the viral hemagglutinin (HA) receptor binding properties from two human H7N9 isolates,
　　A/Shanghai/1/2013 (SH-H7N9) (containing the avian-signature Q226) and A/Anhui/1/2013 (AH-H7N9)
　　(containing the mammalian-signature L226). We found that SH-H7N9 HA preferentially binds the avian receptor
　　analog, whereas the AH-H7N9 HA binds both avian and human ...

09 13 , 2013
SIRT6 Regulates TNF-α Secretion Through Hydrolysis of Long-chain Fatty Acyl Lysine

The Sir2 family of enzymes or sirtuins are known as nicotinamide adenine dinucleotide (NAD)-dependent deacetylases and have been implicated in the regulation of transcription, genome stability, metabolism and lifespan. However, four of the seven mammalian sirtuins have very weak deacetylase activity in vitro. 11-04-2013
　　The Sir2 family of enzymes or sirtuins are known as nicotinamide adenine dinucleotide (NAD)-dependent
　　deacetylases and have been implicated in the regulation of transcription, genome stability, metabolism and lifespan.
　　However, four of the seven mammalian sirtuins have very weak deacetylase activity in vitro. Here we show that
　　human SIRT6 efficiently removes long-chain fatty acyl groups, such as myristoyl, from lysine residues. The crystal
　　structure of SIRT6 rev...

04 11 , 2013

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