scholarly journals UC Davis - Lipoprotein profiling and partical size v1 (protocols.io.yrifv4e)

protocols.io ◽  
2019 ◽  
Author(s):  
Peter Havel
Keyword(s):  
Partical Size

Relationship of Electrical Properties and Partical Size of Piezoelectric Ceramics Fabricated by Digital Light Processing 3D Printing

2021 ◽  
Author(s):  
Kai Liu ◽  
Jiaming Hu ◽  
Yusheng Shi ◽  
Chenyang Zhou ◽  
Yunfei Sun ◽  
...  
Keyword(s):  
Particle Size ◽  
Electrical Properties ◽  
3D Printing ◽  
Piezoelectric Sensor ◽  
Piezoelectric Ceramics ◽  
Particle Sizes ◽  
Digital Light Processing ◽  
Relationship Of ◽  
Partical Size ◽  
Functional Ceramics

Abstract To improve electrical properties of BaTiO3 piezoelectric ceramics fabricated by 3D printing, effects of particle sizes was investigated on rheological and curing properties of ceramic slurries, electrical properties of BaTiO3 fabricated by Digital Light Processing 3D printing method. It was found that the curing ability of ceramic slurries decreased first and then increased with the increase of particle size from 136 nm to 1486 nm, while the viscosity of the slurries kept decreasing. When the particle size in a range of submicron, the grain size of sintered ceramics decreased from 13.27 μm to 6.84 μm as particle size increasing. Immediately, the relative density, piezoelectric constant, relative permittivity and remanent polarization of sintered ceramics were measured and it turns out to reach 95.32%, 161.4 pC/N, 1512 and 7.59 uC/cm2 respectively while using the BaTiO3 powder with particle sizes of 993 nm. Finally, a cellular structural BaTiO3 ceramics was fabricated by using optimized powder and process parameters and packaged as a piezoelectric sensor, showing a good function of force-electricity conversion. These results demonstrated the feasibility of fabricating high-quality functional ceramics with designed geometry by Digital Light Processing.

Synthesis of Submicron AlON Powder by Wet Chemical Processing

2012 ◽  
Vol 624 ◽  
pp. 42-46 ◽  
Author(s):  
Fei Zhong Ma ◽  
Jing Xuan Lei ◽  
Ying Shi ◽  
Jian Jun Xie ◽  
Fang Lei
Keyword(s):  
Carbothermal Reduction ◽  
Single Phase ◽  
Preparation Method ◽  
Process Conditions ◽  
Chemical Processing ◽  
Particle Sizes ◽  
Synthetic Process ◽  
Median Particle ◽  
Wet Chemical ◽  
Partical Size

The single-phase Υ-AlON powders were synthesized from three different precursors: Υ-Al2O3+C, Al(OH)3+C, NH4Al(OH)2CO3+C at 1750°C by carbothermal reduction and nitridation . The effects of aluminium source and synthetic process conditions on the characteristic of Υ-AlON powders were investigated in order to optimize the preparation method. It was revealed that the wet chemical processing was helpful to reduce partical size. The median particle sizes (d50) of AlON powders synthesized from different precusors were 15.33 μm, 2.886 μm, 405.6 nm, respectively.

Study on the Preparation Technology of CuO Nanometric Powders by Homogeneous Precipitation in High Intensity Ultrasonic Field

2009 ◽  
Vol 79-82 ◽  
pp. 325-328
Author(s):  
Guang Li ◽  
Cheng Wen Chai
Keyword(s):  
High Intensity ◽  
Ultrasonic Field ◽  
Homogeneous Precipitation ◽  
Preparation Technology ◽  
Reaction Velocity ◽  
Ultrasound Field ◽  
Intensity Field ◽  
Speed Up ◽  
Partical Size ◽  
Xrd And Tem

Nanopowder CuO was prepared by a new method which involves homogeneous precipitation in high intensity field, and powder so obtained was examined by XRD and TEM. The mechanism and effects of conditions of treatment on process and final products are also discussed. These results indicate that not only the reaction velocity was speed up dramatically under ultrasound field but also the particle size of production was greatly affected by the intensity of ultrasound field, the greater the ultrasound field, the smaller the partical size.

Purifying crude petroleum by using porous ceramic balls

2020 ◽  
Vol 10 ◽  
Author(s):  
Enas Muhi Hadi ◽  
Khulood Haleem Yousif
Keyword(s):  
Water Absorption ◽  
Sulfur Content ◽  
Apparent Density ◽  
Porous Ceramic ◽  
Apparent Porosity ◽  
Crude Petroleum ◽  
Metallic Contact ◽  
Dry Pressing ◽  
Porosity Ratio ◽  
Partical Size

Background: Background: In this study ceramic crude petroleum filter was prepared from Iraqi White Kaolin with ratio (70%) and Alumina (Al2O3) with ratio (30%), with natural additives Palm Frond with ratios (5,10,15,25,35 and 45)% in different partical size to produce pores, formed by dry pressing then fairing at 1100(˚C). The filters are harmless and environmentally friendly materials. Some assessments were carried out, such as (apparent porosity ratio, water absorption ratio, and apparent density). From the test results obtained the apparent porosity was 60.7% , water absorption was 89.3% and an apparent density of 0.68% with a 45% ratio of fine (P.F). Methods: Size and distribution of pores were characterized by using Scanning Electron Microscope (SEM). The crude petroleum treated with filters evaluated by tests such as (API Gravity, Sulfur Content, Asphaltenes Content, and Metallic Content). Results: The result of API Gravity before immersion crude petroleum filter balls was 24.70 and after immersion crude petroleum filter balls for 7 days for 30 % (P.F) increase to 31.0 and reach to 32.5 after immersion for 14 days. Sulfur Content before immersion crude petroleum filter balls was 3.76 and after immersion crude petroleum filter balls for 7 days for 30 % (P.F) decrease down to 3.1 and reach to 2.6 after immersion for 14 days. Conclusion: So Asphaltenes content before immersion crude petroleum filter balls was 6.68 and after immersion crude petroleum filter balls for 7 days 30 % (P.F) decreased down to 2 and reach to 1.6 after immersion for 14 days, metallic contact such as Vanadium and Nickel before immersion crude petroleum filter balls respectively was 86 ppm, 32 ppm while after immersion crude petroleum filter balls for 7 days they become 53.26 ppm and 15.35 ppm and for 14 days they reached to 47.52 ppm and 11.43 ppm respectively.

Synthesis of CdS Quantum Dots for Detection of Copper (II) Using Fluorescence Spectroscopy

2011 ◽  
Vol 306-307 ◽  
pp. 1334-1337 ◽  
Author(s):  
Meng Zhang ◽  
Fu Wei Wan ◽  
Shen Guang Ge ◽  
Jing Hua Yu
Keyword(s):  
Quantum Dots ◽  
Fluorescence Intensity ◽  
Colloidal Solution ◽  
Low Cost ◽  
Aqueous System ◽  
Cds Quantum Dots ◽  
High Quality ◽  
Cds Qds ◽  
Partical Size

We report the synthesis and characterization of a low-cost high-quality CdS quantum dots (QDs).The synthesis was performed in aqueous system. The aqueous CdS colloidal solution was prepared using thioglycollic acid as a capping agent. Zetasizer Nano ZS (Malvern, UK) was employed to characterize the partical size of CdS QDs. The UV-vis and photoluminescence (PL) spectra of samples were systematically characterized (the full width at half maximum was 38 nm). The maximum photoluminescence (PL) quantum yield (QY) was as high as 68.5 %. The fluorescence intensity was enhanced by copper (II). The relative fluorescence intensity was linear to copper (II) concentration over the range 4.0 ×10-6 - 2.8×10-5 g mL-1. The regression equation was ΔIF= 59.07+ 90.57c (c / μg mL-1). The highly monodispersed CdS QDs could be used in many fields.

A Statistical Method Based on the Image of the Ore Partical Size Distribution

2012 ◽  
Vol 263-266 ◽  
pp. 2581-2585
Author(s):  
Nan Nan Zhao ◽  
Juan Hu ◽  
Lian Jun Guo
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Statistical Method ◽  
Size Distribution ◽  
Watershed Algorithm ◽  
Watershed Segmentation ◽  
Morphological Reconstruction ◽  
Gradient Image ◽  
Partical Size ◽  
Seed Area

A statistical method of particle size distribution is researched in order to measure the mineral blasting effect. Aimed at resolving the problems of sensitivity to noise and over-segmentation existing in the traditional watershed algorithm(TWA), a improved watershed segmentation scheme based on morphological reconstruction and mark extraction is presented. Firstly, two-stage grayscale morphological reconstruction (TGMR)is employed to filter the image. Secondly, the watershed seed area and the watershed line area are pre-calibrated in the gradient image. Finally, the watershed transformation(WT) is conducted so as to further eliminate over-segmentation. Simulations show that the method can effectively remove the noise jamming and restrain the over-segmentation. It is also able to accurately locate the ore region contour in order to improve the segmentation results.

Preparation and Growth Characteristics of Mesocarbon Microbeads

2013 ◽  
Vol 750-752 ◽  
pp. 1121-1124 ◽  
Author(s):  
Zhi Wang ◽  
Chun Hong Yu
Keyword(s):  
Electron Microscopy ◽  
Coal Tar ◽  
Growth Characteristics ◽  
Coal Tar Pitch ◽  
Growth Time ◽  
Optimum Temperature ◽  
Mesocarbon Microbeads ◽  
Particle Size Analyzer ◽  
Partical Size ◽  
Scanning Electron

Mesocarbon microbeads (MCMBs) have been synthesized from coal tar pitch. Scanning electron microscopy (SEM) and laser particle size analyzer were used to evaluate the structure and partical size. The effect of process parameters on the growth and morphologies of MCMBs was investigated. The results show that the optimum temperature range is 410-430 °C and the growth time has a suitable range. The diameter and yield of MCMBs will increase and the spherical degree does not change with the extension of time.

Preparation of Nano-Iron Oxide Red from Bio-Oxidation Wastewater

2011 ◽  
Vol 233-235 ◽  
pp. 794-797
Author(s):  
Qian Li ◽  
Kai Yu ◽  
Ping Mu ◽  
Yan Wen Tian ◽  
Jian Zhong Li
Keyword(s):  
Iron Oxide ◽  
Ph Value ◽  
Chemical Deposition ◽  
Average Diameter ◽  
Process Conditions ◽  
Light Region ◽  
Valuable Element ◽  
The Difference ◽  
Good Transparency ◽  
Partical Size

According to the difference of chemical deposition behavior of arsenic and iron ion in the different pH value solution, valuable element Fe was first recovered by the selective deposition from bio-oxidation wastewater and then it was used to prepare nano-iron oxide red pigment powders. The effect of purifying conditions, calcinations temperature and calcinations time on the product color, the average partical size had been investigated. The crystal structure, particle-size and properties of the nanoparticles were characterized by means of XRD, TEM. The optimal process conditions of the preparation of iron oxide red were: calcinations temperature was 900°C, calcinations time was 120min. Under these conditions, the color of production was bright red. The particles were fully developed, and the average diameter of nanometer particle was about 70.8nm. In the visible light region of 380 to 780nm, the particle possessed good transparency, achieving the standard of GB1863 – 89.

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