Formation Mechanism of Liquid Inclusions in Dicumyl Peroxide Crystals

A triclinic SAPO-34 molecular sieve was synthesized ionothermally. The as-synthesized products were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), nuclear magnetic resonance (NMR), fourier infrared spectrometer (FT-IR) and thermogravimetric (TG) analyses. The formation mechanism of the hierarchical porous triclinic SAPO-34 zeolites and the factors affecting the morphology of the SAPO-34 molecular sieve were investigated. The results show that the formation mechanism of the hierarchical pores is in accordance with Ostwald ripening theory, and the accumulation of grains constitutes the existence of mesopores and macropores. The crystallization temperature, ionic liquid type, and organic amines can effectively change the morphology and crystallinity of the SAPO-34 molecular sieve. The crystallization temperature, ionic liquid and template have great influence on the (111) crystal plane, thus affecting the morphology of the molecular sieve. Moreover, it can be proven through NMR and TG analyses that ionic liquids and organic amines can be used as structure directing agents together.

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Study of Carbonization Process on Surface of Si Substrate in High Vacuum Region with Hydrocarbon Gas

Materials Science Forum ◽

10.4028/www.scientific.net/msf.740-742.161 ◽

2013 ◽

Vol 740-742 ◽

pp. 161-164 ◽

Cited By ~ 1

Author(s):

Yukimune Watanabe ◽

Keisuke Shinoda ◽

Masahiro Tsukahara ◽

Hiroyuki Shimada ◽

Masahiro Furusawa ◽

...

Keyword(s):

Formation Mechanism ◽

High Vacuum ◽

Crystal Defects ◽

Process Time ◽

Process Conditions ◽

Si Substrate ◽

Pit Formation ◽

Gas Source ◽

Hydrocarbon Gas ◽

Low Temperature Process

The formation mechanism of a carbonized layer was investigated under low-pressure and low-temperature process conditions. The initial carbonized layer under those conditions was formed epitaxially using the silicon atoms sublimated from substrate and the carbon atoms of the gas source. This result is suggested from the consideration of pit formation mechanism at the Si/SiC interface. After the initial layer was formed, the carbonized layer grew by the diffusion process of the carbon atoms through the crystal defects in the initially formed layer. This is suggested from that the thickness of the carbonized layer increases linearly with the square root of the process time. The growth rate seemed to be determined by the concentration of carbon atoms taken into the SiC.

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Formation Mechanism of Defects in the Reaction Layer of Si3N4 to Metal Joints. Factors Affecting Bonding Strength of Fine Ceramics to Metals(Report 3).

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY ◽

10.2207/qjjws.11.525 ◽

1993 ◽

Vol 11 (4) ◽

pp. 525-530 ◽

Cited By ~ 1

Author(s):

Yoshikuni Nakao ◽

Kazutoshi Nishimoto ◽

Kazuyoshi Saida

Keyword(s):

Formation Mechanism ◽

Reaction Layer ◽

Bonding Strength ◽

Factors Affecting ◽

Fine Ceramics

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Reaction–Diffusion Model-Based Research on Formation Mechanism of Neuron Dendritic Spine Patterns

Frontiers in Neurorobotics ◽

10.3389/fnbot.2021.563682 ◽

2021 ◽

Vol 15 ◽

Author(s):

Yiqing Jia ◽

Qili Zhao ◽

Hongqiang Yin ◽

Shan Guo ◽

Mingzhu Sun ◽

...

Keyword(s):

Diffusion Model ◽

Formation Mechanism ◽

Dendritic Spine ◽

Reaction Diffusion ◽

Model Parameters ◽

Factors Affecting ◽

Model Based ◽

Spine Shape ◽

Reaction Diffusion Model ◽

Treatment Research

The pattern abnormalities of dendritic spine, tiny protrusions on neuron dendrites, have been found related to multiple nervous system diseases, such as Parkinson's disease and schizophrenia. The determination of the factors affecting spine patterns is of vital importance to explore the pathogenesis of these diseases, and further, search the treatment method for them. Although the study of dendritic spines is a hot topic in neuroscience in recent years, there is still a lack of systematic study on the formation mechanism of its pattern. This paper provided a reinterpretation of reaction-diffusion model to simulate the formation process of dendritic spine, and further, study the factors affecting spine patterns. First, all four classic shapes of spines, mushroom-type, stubby-type, thin-type, and branched-type were reproduced using the model. We found that the consumption rate of substrates by the cytoskeleton is a key factor to regulate spine shape. Moreover, we found that the density of spines can be regulated by the amount of an exogenous activator and inhibitor, which is in accordance with the anatomical results found in hippocampal CA1 in SD rats with glioma. Further, we analyzed the inner mechanism of the above model parameters regulating the dendritic spine pattern through Turing instability analysis and drew a conclusion that an exogenous inhibitor and activator changes Turing wavelength through which to regulate spine densities. Finally, we discussed the deep regulation mechanisms of several reported regulators of dendritic spine shape and densities based on our simulation results. Our work might evoke attention to the mathematic model-based pathogenesis research for neuron diseases which are related to the dendritic spine pattern abnormalities and spark inspiration in the treatment research for these diseases.

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Research on the Evaluation of Digital Prints Quality Based on Noise

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.731.222 ◽

2015 ◽

Vol 731 ◽

pp. 222-227

Author(s):

Ni Chen ◽

Qiang Wang ◽

Ping Yang ◽

Jun Long Xu

Keyword(s):

Formation Mechanism ◽

Detection System ◽

Objective Evaluation ◽

Evaluation Methods ◽

Digital Printing ◽

Noise Detection ◽

Factors Affecting ◽

Printing Quality ◽

Digital Prints

With the development of digital printing, the needs for evaluating digital printing increase. In this study, the factors affecting the quality of digital prints are analyzed, and a set of digital prints noise detection system, test charts and evaluation methods are established by decoding the formation mechanism of the noise. Experiments showed that the noise had been affected by the type of paper, the image forming method of digital printing, the toner particles closely related in particular. As a result, this study can be used to select and optimize the printing’s outputting resolution to ensure printing quality based on subjective and objective evaluation the noise of digital printing.

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The Imaging of Crystal Structures and Crystal Defects

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069995 ◽

1978 ◽

Vol 36 (3) ◽

pp. 207-217

Author(s):

J.M. Cowley

Keyword(s):

Electron Microscope ◽

Crystal Structures ◽

Phase Contrast ◽

Crystal Defects ◽

Atom Density ◽

Lack Of Information ◽

Spatial Frequencies

The problem of "understandinq" electron microscope imaqes becomes more acute as the resolution is improved. The naive interpretation of an imaqe as representinq the projection of an atom density becomes less and less appropriate. We are increasinqly forced to face the complexities of coherent imaqinq of what are essentially phase objects. Most electron microscopists are now aware that, for very thin weakly scatterinq objects such as thin unstained bioloqical specimens, hiqh resolution imaqes are best obtained near the optimum defocus, as prescribed by Scherzer, where the phase contrast imaqe qives a qood representation of the projected potential, apart from a lack of information on the lower spatial frequencies. But phase contrast imaqinq is never simple except in idealized limitinq cases.

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Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100078614 ◽

1977 ◽

Vol 35 ◽

pp. 214-217

Author(s):

F. A. Heckman ◽

E. Redman ◽

J.E. Connolly

Keyword(s):

Image Analysis ◽

Image Quality ◽

Exposure Time ◽

Image Contrast ◽

Automated Image Analysis ◽

Practical Application ◽

Factors Affecting ◽

High Image Quality ◽

Qualitative Evidence ◽

Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

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