High throughput nanoparticle generation utilizing high-frequency spark discharges via rapid spark plasma removal

ABSTRACT Experimental evolution is a method in which populations of organisms, often microbes, are founded by one or more ancestors of known genotype and then propagated under controlled conditions to study the evolutionary process. These evolving populations are influenced by all population genetic forces, including selection, mutation, drift, and recombination, and the relative contributions of these forces may be seen as mysterious. Here, I describe why the outcomes of experimental evolution should be viewed with greater certainty because the force of selection typically dominates. Importantly, any mutant rising rapidly to high frequency in large populations must have acquired adaptive traits in the selective environment. Sequencing the genomes of these mutants can identify genes or pathways that contribute to an adaptation. I review the logic and simple mathematics why this evolve-and-resequence approach is a powerful way to find the mutations or mutation combinations that best increase fitness in any new environment.

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Softening Hard Water Using High Frequency Spark Plasma Discharge

Plasma Chemistry and Plasma Processing ◽

10.1007/s11090-016-9762-x ◽

2016 ◽

Vol 37 (1) ◽

pp. 99-114 ◽

Cited By ~ 2

Author(s):

Talie Zarei ◽

Shahriar Mirpour ◽

Hamed Nikmaram ◽

Mahmood Ghoranneviss ◽

Sahar Mirpour ◽

...

Keyword(s):

High Frequency ◽

Hard Water ◽

Plasma Discharge ◽

Spark Plasma

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SiC dispersed Fe-based glassy composite cores produced by spark plasma sintering and their high frequency magnetic properties

Intermetallics ◽

10.1016/j.intermet.2011.08.023 ◽

2012 ◽

Vol 20 (1) ◽

pp. 76-81 ◽

Cited By ~ 17

Author(s):

Guoqiang Xie ◽

Hisamichi Kimura ◽

Dmitri V. Louzguine-Luzgin ◽

He Men ◽

Akihisa Inoue

Keyword(s):

Magnetic Properties ◽

Spark Plasma Sintering ◽

High Frequency ◽

Plasma Sintering ◽

Spark Plasma

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High Frequency Dielectric Properties and Thermal Conductivity of AlN-BN Composites by Spark Plasma Sintering

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.512-515.902 ◽

2012 ◽

Vol 512-515 ◽

pp. 902-907 ◽

Cited By ~ 1

Author(s):

Zhi Xue Qu ◽

Wang Qun ◽

Chang Chun Cui ◽

Yao Hui Zhang

Keyword(s):

Thermal Conductivity ◽

Dielectric Properties ◽

Spark Plasma Sintering ◽

High Frequency ◽

Sintering Process ◽

Sintering Additives ◽

Multiple Components ◽

Plasma Sintering ◽

Relaxation Loss ◽

Spark Plasma

AlN-BN composite is considered to be a promising material for microwave transparent applications. In this paper, a series of AlN-BN composites with various content of BN (0 wt%, 5 wt%, 15 wt% and 30 wt%) were prepared by spark plasma sintering with multiple components sintering additives at a low temperature (1650 °C), and the effect of sintering conditions and composition on the thermal conductivity and high frequency dielectric properties within frequency range from 10 MHz to 1.5 GHz was investigated. The results show that the spark plasma sintering process and the multiple components of the sintering additives promote the densification of the samples. The thermal conductivity and dielectric constant of samples decrease with increasing BN content, while the variation of the dielectric loss depends on the content of residual carbon and other impurities which may result in the relaxation loss of electronic polarization and conductive loss.

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High-Throughput Thermal Plasma Synthesis of FexCo1-x Nano-Chained Particles with Unusually-High Permeability, and their Electromagnetic Wave Absorption Properties at High Frequency (1-26 GHz)

Nanoscale ◽

10.1039/d1nr01845k ◽

2021 ◽

Author(s):

Min-Sun Jang ◽

Mi Se Chang ◽

Young-tae Kwon ◽

Sangsun Yang ◽

Jina Gwak ◽

...

Keyword(s):

Electromagnetic Wave ◽

High Throughput ◽

Reflection Loss ◽

Thermal Plasma ◽

High Frequency ◽

Plasma Synthesis ◽

High Permeability ◽

Absorption Properties ◽

Electromagnetic Wave Absorption ◽

Thermal Plasma Synthesis

Herein, we introduce novel 1-dimensional nano-chained FeCo particles with unusually-high permeability prepared by a highly-productive thermal plasma synthesis, and demonstrate an electromagnetic wave absorber with exceptionally low reflection loss in...

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HIGH-FREQUENCY DIELECTRIC SPECTROSCOPY OF BaTiO3 CORE — SILICA SHELL NANOCOMPOSITES: PROBLEM OF INTERDIFFUSION

Journal of Advanced Dielectrics ◽

10.1142/s2010135x11000367 ◽

2011 ◽

Vol 01 (03) ◽

pp. 309-317 ◽

Cited By ~ 14

Author(s):

D. NUZHNYY ◽

J. PETZELT ◽

V. BOVTUN ◽

M. KEMPA ◽

M. SAVINOV ◽

...

Keyword(s):

Dielectric Spectroscopy ◽

High Frequency ◽

Interfacial Polarization ◽

Dielectric Materials ◽

Composite Ceramics ◽

Broadband Dielectric Spectroscopy ◽

Plasma Sintering ◽

Sensitive Tool ◽

Spark Plasma ◽

Shell Powder

Three types of BaTiO3 core — amorphous nanoshell composite ceramics were processed from the same core-shell powder by standard sintering, spark-plasma sintering and two-step sintering techniques and characterized by XRD, HRSEM and broadband dielectric spectroscopy in the frequency range 103 – 1013 Hz including the THz and IR range. The samples differed by porosity and by the amount of interdiffusion from the cores to shells, in correlation with their increasing porosity. The dielectric spectra were also calculated using suitable models based on effective medium approximation. The measurements revealed a strong dielectric dispersion below the THz range, which cannot be explained by the modeling, and whose strength was in correlation with the degree of interdiffusion. It is assigned to an effect of the interdiffusion layers, giving rise to a strong interfacial polarization. It appears that the high-frequency dielectric spectroscopy is an extremely sensitive tool for detection of any gradient layers and sample inhomogeneities even in dielectric materials with negligible conductivity.

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A Facile Strategy for Visualizing and Modulating Droplet-Based Microfluidics

Micromachines ◽

10.3390/mi10050291 ◽

2019 ◽

Vol 10 (5) ◽

pp. 291 ◽

Cited By ~ 1

Author(s):

Zehang Gao ◽

Huo Peng ◽

Minjie Zhu ◽

Lei Wu ◽

Chunping Jia ◽

...

Keyword(s):

High Throughput ◽

High Frequency ◽

Imaging System ◽

Low Cost ◽

Low Frequency ◽

Microfluidic Chips ◽

Frequency Signal ◽

High Frequency Signal ◽

Additional Signal ◽

And Control

In droplet-based microfluidics, visualizing and modulating of droplets is often prerequisite. In this paper, we report a facile strategy for visualizing and modulating high-throughput droplets in microfluidics. In the strategy, by modulating the sampling frequency of a flash light with the droplet frequency, we are able to map a real high frequency signal to a low frequency signal, which facilitates visualizing and feedback controlling. Meanwhile, because of not needing synchronization signals, the strategy can be directly implemented on any droplet-based microfluidic chips. The only cost of the strategy is an additional signal generator. Moreover, the strategy can catch droplets with frequency up to several kilohertz, which covers the range of most high-throughput droplet-based microfluidics. In this paper, the principle, setup and procedure were introduced. Finally, as a demonstration, the strategy was also implemented in a miniaturized picoinjector in order to monitor and control the injection dosage to droplets. We expect that this facile strategy supplies a low-cost yet effective imaging system that can be easily implemented in miniaturized microfluidic systems or general laboratories.

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