scholarly journals A data efficient method for characterization of chameleon tongue motion using Doppler radar

2012 ◽  
Author(s):  
A. Singh ◽  
N. Hafner ◽  
V. Lubecke ◽  
M. Butler
Keyword(s):  
Efficient Method ◽  
Doppler Radar ◽  
Tongue Motion

Catalytic hydroboration of carbonyl derivatives by phosphinimino amide ligated magnesium complexes

2021 ◽  
Author(s):  
min li ◽  
Xinli Liu ◽  
Dongmei Cui
Keyword(s):  
Efficient Method ◽  
Synthesis And Characterization ◽  
Carbonyl Derivatives ◽  
Earth Abundant ◽  
Magnesium Complexes

Reduction of the carbonyl derivatives by earth-abundant, cheap and environmental benign metal based catalysts in the atom-efficient method is a challenging task. Herein, we report the synthesis and characterization of...

Pulsed Vulcanian explosions: A characterization of eruption dynamics using Doppler radar

Geology ◽  
2015 ◽  
Vol 43 (11) ◽  
pp. 995-998 ◽  
Author(s):  
Lea Scharff ◽  
Matthias Hort ◽  
Nick R. Varley
Keyword(s):  
Doppler Radar ◽  
Eruption Dynamics ◽  
Vulcanian Explosions

An Efficient Method For Characterization Of ASIC Compilers

2005 ◽  
Author(s):  
S.S. Janaki ◽  
S. Madhuri ◽  
T.S. Raghuram ◽  
S. De Sirkar
Keyword(s):  
Efficient Method

Synthesis and Characterization of Magnetic Al/NiO Composite Pigments with Low Infrared Emissivity

2017 ◽  
Vol 898 ◽  
pp. 1561-1568 ◽  
Author(s):  
Yun Feng Liu ◽  
Jian Liang Xie ◽  
Mei Luo ◽  
Bo Peng ◽  
Long Jiang Deng
Keyword(s):  
Magnetic Properties ◽  
Efficient Method ◽  
Spectral Reflectance ◽  
Synthesis And Characterization ◽  
Magnetic Composite ◽  
Infrared Emissivity ◽  
Flowing Liquid ◽  
Aluminum Flake ◽  
Addition Amount

Generally, traditional low infrared coatings based on metallic pigments cannot have low lightness, low infrared emissivity and low radar reflectivity simultaneously. Herein, we used a simple and efficient method to synthesize magnetic Al/NiO composite pigments which possessed all these attributes to a degree. The results indicated that the covering area of NiO on the aluminum flake could be tuned by the addition amount of NiCO3 and the reaction temperature of hot-flowing, both of which played a key role on the VIS/IR spectral reflectance and magnetic properties. The magnetic Al/NiO composite pigments with low lightness and low infrared emissivity could be obtained at 130 °C for 24 h in hot flowing liquid. The lightness L* could be decreased to 75.94, however the infrared emissivity (8-14 μm) was also low to 0.421. Compared with the single aluminum flakes, the Al/NiO magnetic composite pigments presented stronger magnetic properties. Therefore, the Al/NiO magnetic composite pigments offered a new choice for the pigments of multispectral stealth coating.

Synthesis and Characterization of New 2-Methoxy-Thieno[2,3-d]pyrimidin-4(3H)-One

2012 ◽  
Vol 550-553 ◽  
pp. 89-92
Author(s):  
Lian Ying Lu ◽  
Zhong Shan Yu ◽  
Zheng Dong Fang ◽  
Yong Zhou Chen ◽  
Wen Zhou ◽  
...  
Keyword(s):  
1H Nmr ◽  
Efficient Method ◽  
Nmr Spectra ◽  
Wittig Reaction ◽  
Nucleophilic Reagent ◽  
1H Nmr Spectra ◽  
Synthesis And Characterization ◽  
Cyclization Process ◽  
Gewald Reaction

An efficient method is described for the synthesis of 2-methoxy-thieno[2,3-d]pyrimidin- 4(3H)-one (5) via Gewald reaction, a tandem aza-Wittig reaction and cyclization process. The key step is an aza-Wittig reaction between iminophosphorane (2), 4-chlorophenyl isocyanine and nucleophilic reagent CH3OH. Its structures were determined by means of MS, IR and 1H NMR spectra.

scholarly journals Characterization of the Sporulation Control Protein SsgA by Use of an Efficient Method To Create and Screen Random Mutant Libraries in Streptomycetes

2007 ◽  
Vol 73 (7) ◽  
pp. 2085-2092 ◽  
Author(s):  
Bjørn A. Traag ◽  
Nicolas Seghezzi ◽  
Erik Vijgenboom ◽  
Gilles P. van Wezel
Keyword(s):  
Efficient Method ◽  
Streptomyces Coelicolor ◽  
Product Formation ◽  
Single Amino Acid ◽  
Poor Growth ◽  
Microtiter Plates ◽  
Enhanced Expression ◽  
Major Bottleneck ◽  
Carboxy Terminal

ABSTRACT Filamentous actinomycetes are commercially widely used as producers of natural products. However, the mycelial lifestyle of actinomycetes has been a major bottleneck in their commercialization, and screening is difficult due to their poor growth on microtiter plates. We previously demonstrated that the enhanced expression of the cell division activator protein SsgA results in the fragmented growth of streptomycetes, with enhanced growth rates and improved product formation. We here describe a novel and efficient method to create, maintain, and screen mutant libraries in streptomycetes and the application of this method for the functional analysis of Streptomyces coelicolor ssgA. The variants were amplified directly from deep-frozen biomass suspensions. Around 800 ssgA variants, including single-amino-acid-substitution mutants corresponding to more than half of all SsgA residues, were analyzed for their abilities to restore sporulation to an ssgA mutant. The essential residues were clustered in three main sections, and hardly any were in the carboxy-terminal third of the protein. The majority of the crucial residues were conserved among all SsgA-like proteins (SALPs). However, the essential residues L29, D58, and S89 were conserved only in SsgA orthologues and not in other SALPs, suggesting an SsgA-specific function.

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