Metallasilsesquioxane-derived ultrathin porous carbon nanosheet 3D architectures via an “in situ dual templating” strategy for ultrafast sodium storage

2021 ◽  
Vol 9 (10) ◽  
pp. 6423-6431
Author(s):  
Xieji Lin ◽  
Yue Dong ◽  
Xiaohong Chen ◽  
Haiyan Liu ◽  
Zhaobin Liu ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Carbon Sources ◽  
Carbon Nanosheets ◽  
Different Dimensions ◽  
First Time ◽  
Sodium Storage

It is the first time that metallasilsesquioxanes are introduced into the synthesis of porous carbon nanosheets. Lithium hepta(i-butyl)silsesquioxane trisilanolate is a multifunctional precursor for both carbon sources and templates with different dimensions.

Induction and Transcription Studies of the Dextransucrase Gene in Leuconostoc mesenteroides NRRL B-512F

1999 ◽  
Vol 65 (12) ◽  
pp. 5504-5509 ◽  
Author(s):  
M. Quirasco ◽  
A. López-Munguía ◽  
M. Remaud-Simeon ◽  
P. Monsan ◽  
A. Farrés
Keyword(s):  
High Performance ◽  
Leuconostoc Mesenteroides ◽  
Carbon Sources ◽  
Promoter Sequence ◽  
Culture Conditions ◽  
Start Codon ◽  
Reaction Products ◽  
Product Specificity ◽  
First Time

ABSTRACT Dextransucrase production by Leuconostoc mesenteroidesNRRL B-512F in media containing carbon sources other than sucrose is reported for the first time. Dextransucrases were analyzed by gel electrophoresis and by an in situ activity assay. Their polymers and acceptor reaction products were also compared by 13C nuclear magnetic resonance and high-performance liquid chromatography techniques, respectively. From these analyses, it was found that, independently of the carbon source, L. mesenteroides NRRL B-512F produced dextransucrases of the same size and product specificity. The 5′ ends of dextransucrase mRNAs isolated from cells grown under different culture conditions were identical. Based on this evidence, we conclude that dextransucrases obtained from cells grown on the various carbon sources result from the transcription of the same gene. The control of expression occurs at this level. The low dextransucrase yields from cultures in d-glucose ord-fructose and the enhancement of dextransucrase gene transcription in the presence of sucrose suggest that an activating phenomenon may be involved in the expression mechanism. Dextransucrase mRNA has a size of approximately 4.8 kb, indicating that the gene is located in a monocistronic operon. The transcription start point was localized 34 bp upstream from the ATG start codon. The −10 and −35 sequences found, TATAAT and TTTACA, were highly homologous to the only glycosyltransferase promoter sequence reported for lactic acid bacteria.

2D MOF-derived CoS1.097 nanoparticle embedded S-doped porous carbon nanosheets for high performance sodium storage

2021 ◽  
Vol 405 ◽  
pp. 126638
Author(s):  
Ang Li ◽  
Peixun Xiong ◽  
Yajing Zhang ◽  
Wei Shuang ◽  
Ze Chang ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Carbon Nanosheets ◽  
Sodium Storage

Boosting ultrahigh initial Coulombic efficiency of porous carbon anode for sodium-ion batteries via in-situ fabricating passivation interface

2021 ◽  
Author(s):  
Minghao Zhang ◽  
Yu Li ◽  
Feng Wu ◽  
Zhaohua Wang ◽  
Ying Bai ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Coulombic Efficiency ◽  
Sodium Ion ◽  
Carbon Anode ◽  
Porous Carbon Material ◽  
Sodium Ion Batteries ◽  
Storage Performance ◽  
Initial Coulombic Efficiency ◽  
Sodium Storage

Porous carbon material is regarded as one of the promising candidates of sodium-ion batteries (SIBs) due to its fast sodium storage performance. However, the inadequate initial Coulombic efficiency (ICE) resulting...

Ultrathin carbon nanosheets for highly efficient capacitive K-ion and Zn-ion storage

2020 ◽  
Vol 8 (43) ◽  
pp. 22874-22885
Author(s):  
Yamin Zhang ◽  
Zhongpu Wang ◽  
Deping Li ◽  
Qing Sun ◽  
Kangrong Lai ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Template Method ◽  
Carbon Nanosheets ◽  
Hierarchically Porous ◽  
Highly Efficient ◽  
Ion Storage

Through an in situ self-template method, ultrathin hierarchically porous carbon nanosheets are facilely prepared, delivering superior capacitive K-ion and Z-ion storage.

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