A gas flow method for determination of in-plane permeability of fiber preforms

2001 ◽  
Vol 22 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Moon-Kwang Um ◽  
Isaac M. Daniel ◽  
Brian W. Childs
Keyword(s):  
Gas Flow ◽  
Flow Method ◽  
Fiber Preforms

Determination of in-plane permeability of fiber preforms by the gas flow method using pressure measurements

2003 ◽  
Vol 24 (1) ◽  
pp. 34-44 ◽  
Author(s):  
Sun K. Kim ◽  
Jeremy G. Opperer ◽  
Dae-Hwan Kim ◽  
Isaac M. Daniel
Keyword(s):  
Gas Flow ◽  
Pressure Measurements ◽  
Flow Method ◽  
Fiber Preforms

Method of operational determination of gas flow density in working conditions

2018 ◽  
pp. 8-11
Author(s):  
E.N. Farzane ◽  
◽  
S.Ch.Z. Alradhi ◽  
Keyword(s):  
Working Conditions ◽  
Gas Flow ◽  
Flow Density

A Continuous-Flow Method for the Determination of the Activity of Serum Alkaline Phosphatase in Diethanolamine Buffer

1975 ◽  
Vol 35 (3) ◽  
pp. 267-273 ◽  
Author(s):  
A. J. Viitala ◽  
H. A. Jokela ◽  
I. M. Penttila ◽  
S. Nummi
Keyword(s):  
Alkaline Phosphatase ◽  
Continuous Flow ◽  
Serum Alkaline Phosphatase ◽  
Flow Method ◽  
Continuous Flow Method

scholarly journals On factors affecting surface free energy of carbon black for reinforcing rubber

2020 ◽  
Vol 9 (1) ◽  
pp. 170-181 ◽  
Author(s):  
Shangyong Zhang ◽  
Ruipeng Zhong ◽  
Ruoyu Hong ◽  
David Hui
Keyword(s):  
Free Energy ◽  
Carbon Black ◽  
Surface Free Energy ◽  
Surface Activity ◽  
Gas Flow ◽  
Influential Factors ◽  
Chromatographic Column ◽  
Factors Affecting ◽  
Carrier Gas Flow

AbstractThe surface activity of carbon black (CB) is an important factor affecting the reinforcement of rubber. The quantitative determination of the surface activity (surface free energy) of CB is of great significance. A simplified formula is obtained to determine the free energy of CB surface through theoretical analysis and mathematical derivation. The surface free energy for four kinds of industrial CBs were measured by inverse gas chromatography, and the influential factors were studied. The results showed that the aging time of the chromatographic column plays an important role in accurate measurement of the surface free energy of CB, in comparison with the influences from the inlet pressure and carrier gas flow rate of the chromatographic column filled with CB. Several kinds of industrial CB were treated at high temperature, and the surface free energy of CB had a significant increase. With the increase of surface free energy, the maximum torque was decreased significantly, the elongation at break tended to increase, the heat generation of vulcanizates was increased, and the wear resistance was decreased.

scholarly journals Determination of respiratory gas flow by electrical impedance tomography in an animal model of mechanical ventilation

2014 ◽  
Vol 14 (1) ◽  
Author(s):  
Marc Bodenstein ◽  
Stefan Boehme ◽  
Stephan Bierschock ◽  
Andreas Vogt ◽  
Matthias David ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Animal Model ◽  
Electrical Impedance Tomography ◽  
Gas Flow ◽  
Electrical Impedance ◽  
Impedance Tomography

A study on the determination of in-plane permeability of fiber preforms

1999 ◽  
Vol 20 (6) ◽  
pp. 771-779 ◽  
Author(s):  
Moon-kwang Um ◽  
Sang-kwan Lee
Keyword(s):  
Fiber Preforms

Determination of Solution Ions by Electrospray Mass Spectrometry

1994 ◽  
Vol 48 (6) ◽  
pp. 655-661 ◽  
Author(s):  
George R. Agnes ◽  
Gary Horlick
Keyword(s):  
Mass Spectrometry ◽  
Metal Ion ◽  
Gas Flow ◽  
Electrospray Mass Spectrometry ◽  
Negative Ion ◽  
Molecular Forms ◽  
Mass Spectral ◽  
Oxo Anions ◽  
Electrospray Source

Spectral results are presented illustrating the capability of electrospray mass spectrometry (ES-MS) for the determination of the composition of solution samples. The solution components that can be determined include the elemental and molecular forms of anions and cations. Three modes of positive-ion ES-MS are described: the ion cluster mode, the metal-ion mode, and an intermediate mode. The modes are established by operating the electrospray source at specific voltages and curtain gas flow rate values, and each mode provides a unique mass spectral picture of the solution components with primary focus on cationic species (i.e., metal ions). Results are also presented for operation of the electrospray source in negative-ion mode. In this mode both elemental anions (i.e., halides) and molecular anions (i.e., oxo-anions) can be determined.

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