scholarly journals Dielectrophoretic Separation of Particles Using Microfluidic Chip with Composite Three-Dimensional Electrode

Micromachines ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 700
Author(s):  
Li Chen ◽  
Xing Liu ◽  
Xiaolin Zheng ◽  
Xiaoling Zhang ◽  
Jun Yang ◽  
...  
Keyword(s):  
Particle Size ◽  
Experimental Verification ◽  
Theoretical Calculations ◽  
Three Dimensional ◽  
Powder Particle Size ◽  
Microfluidic Chips ◽  
Pdms Chip ◽  
3D Electrode ◽  
Shape And Size

Integrating three-dimensional (3D) microelectrodes on microfluidic chips based on polydimethylsiloxane (PDMS) has been a challenge. This paper introduces a composite 3D electrode composed of Ag powder (particle size of 10 nm) and PDMS. Ethyl acetate is added as an auxiliary dispersant during the compounding process. A micromachining technique for processing 3D microelectrodes of any shape and size was developed to allow the electrodes to be firmly bonded to the PDMS chip. Through theoretical calculations, numerical simulations, and experimental verification, the role of the composite 3D microelectrodes in separating polystyrene particles of three different sizes via dielectrophoresis was systematically studied. This microfluidic device separated 20-, 10-, and 5-μm polystyrene particles nondestructively, efficiently, and accurately.

Fine Particles of Rubber Cutting Machine Designed to Explore

2012 ◽  
Vol 472-475 ◽  
pp. 442-445 ◽  
Author(s):  
Li Jun Qiu ◽  
Jia Yang
Keyword(s):  
Particle Size ◽  
Fine Particles ◽  
Powder Particle Size ◽  
Work Efficiency ◽  
Powder Composition ◽  
Cutting Machine ◽  
Powder Particles ◽  
Tire Production ◽  
Mechanical Arrangement

Tire production of fine particles of powder composition and the mechanical arrangement of tool methods of efficiency of the larger craft. Fine particles of cutting edge cutting machine is a small gap between the edge of the particles produced can not exercise the role of the crowded file. File can not be cut and milled to achieve simultaneously. Multi-blade knife and bevel knife gap between the tool installation form. Between powder particles in the twice cut or ground to reduce the powder particle size cheddar and improve work efficiency results.

scholarly journals Role of powder particle size on laser powder bed fusion processability of AlSi10mg alloy

2020 ◽  
pp. 101630
Author(s):  
M.A. Balbaa ◽  
A. Ghasemi ◽  
E. Fereiduni ◽  
M.A. Elbestawi ◽  
S.D. Jadhav ◽  
...  
Keyword(s):  
Particle Size ◽  
Powder Particle ◽  
Powder Particle Size ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

Role of Powder Particle Size on the Encapsulation Efficiency of Oils during Spray Drying

2007 ◽  
Vol 25 (6) ◽  
pp. 1081-1089 ◽  
Author(s):  
Seid Mahdi Jafari ◽  
Yinghe He ◽  
Bhesh Bhandari
Keyword(s):  
Particle Size ◽  
Spray Drying ◽  
Powder Particle ◽  
Encapsulation Efficiency ◽  
Powder Particle Size

Hydrogen Production by Steam Reforming of Methanol over a Ag/ZnO One Dimensional Catalyst

2010 ◽  
Vol 132 ◽  
pp. 205-219 ◽  
Author(s):  
Raul Pérez-Hernández ◽  
A. Gutiérrez-Martínez ◽  
Alvaro Mayoral ◽  
F. Leonard Deepak ◽  
Ma. E. Fernández-García ◽  
...  
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Steam Reforming ◽  
Three Dimensional ◽  
Methanol Conversion ◽  
H2 Production ◽  
One Dimensional ◽  
Steam Reforming Of Methanol ◽  
Ag Particle

One dimensional (1-D) and three dimensional (3-D) ZnO were growth by a hydrothermal method. ZnO 1-D was employed as a support for silver nanoparticles in order to design a new catalyst and used on the steam reforming of methanol (SRM) reaction for H2 production. The catalytic activity of the Ag/ZnO sample with low content of Ag showed better performance on the SRM reaction than on high silver loading catalyst. So, the sample with small Ag particle size showed best performance in methanol conversion than catalyst with big Ag particle size, this finding could be attributed to the high ZnO/Ag ratio. According to results of SEM and TEM techniques the catalytic activity: methanol conversion, H2 and low CO production observed on the Ag/ZnO 1-D catalyst occurs in the edge sites rather than the rim sites. The role of Ag is to accept the hydrogen to be released to the gas phase. In addition, the 1.5Ag/ZnO 1-D catalyst showed good stability during the reaction.

Fibrin Formation: The Role of the Fibrinogen-Fibrin Monomer Complex

1976 ◽  
Vol 36 (01) ◽  
pp. 037-048 ◽  
Author(s):  
Eric P. Brass ◽  
Walter B. Forman ◽  
Robert V. Edwards ◽  
Olgierd Lindan
Keyword(s):  
Particle Size ◽  
Induction Period ◽  
Fibrin Clot ◽  
Clot Formation ◽  
Appreciable Amount ◽  
Buffer System ◽  
Homeostatic Mechanism ◽  
Fibrin Formation ◽  
Fibrin Monomer

SummaryThe process of fibrin formation using highly purified fibrinogen and thrombin was studied using laser fluctuation spectroscopy, a method that rapidly determines particle size in a solution. Two periods in fibrin clot formation were noted: an induction period during which no fibrin polymerization occurred and a period of rapid increase in particle size. Direct measurement of fibrin monomer polymerization and fibrinopeptide release showed no evidence of an induction period. These observations were best explained by a kinetic model for fibrin clot formation incorporating a reversible fibrinogen-fibrin monomer complex. In this model, the complex serves as a buffer system during the earliest phase of fibrin formation. This prevents the accumulation of free polymerizable fibrin monomer until an appreciable amount of fibrinogen has reacted with thrombin, at which point the fibrin monomer level rises rapidly and polymerization proceeds. Clinically, the complex may be a homeostatic mechanism preventing pathological clotting during periods of elevated fibrinogen.

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