scholarly journals On Estimation of Time Scales of Mass Transport in Inhomogenous Material

2016 ◽  
Vol 4 (4) ◽  
pp. 17-26
Author(s):  
Pankratov E.L ◽  
Bulaeva E.A
Keyword(s):  
Mass Transport ◽  
Time Scales ◽  
Estimation Of Time

scholarly journals Speeding up biphasic reactions with surface nanodroplets

Lab on a Chip ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 2965-2974
Author(s):  
Zhengxin Li ◽  
Akihito Kiyama ◽  
Hongbo Zeng ◽  
Detlef Lohse ◽  
Xuehua Zhang
Keyword(s):  
Reaction Time ◽  
Mass Transport ◽  
Time Scales ◽  
Biphasic Reaction ◽  
Kinetics Of ◽  
Reactant Flow

The kinetics of a model biphasic reaction at the interface of surface nanodroplets is quantitatively studied. The droplet reaction time scales with ∼Pe−2/3 of the reactant flow. Enhanced mass transport contributes to accelerated kinetics.

scholarly journals Formation of the Planets

1981 ◽  
Vol 93 ◽  
pp. 113-128
Author(s):  
Chushiro Hayashi
Keyword(s):  
Time Scales ◽  
Solar Nebula ◽  
Planetary Formation ◽  
Evolutionary Sequence ◽  
Basic Features ◽  
Estimation Of Time

A timetable for an evolutionary sequence of processes, which begins with the formation of the solar nebula being nearly in equilibrium and ends with the planetary formation, is presented. Basic features of the processes and grounds for the estimation of time-scales are explained for each of the processes.

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

LVSEM: Past Present and Future

1990 ◽  
Vol 48 (1) ◽  
pp. 364-365
Author(s):  
James B. Pawley
Keyword(s):  
Field Emission ◽  
Line Width ◽  
Time Scales ◽  
Silicon Oxide ◽  
Beam Current ◽  
High Brightness ◽  
High Beam ◽  
Fixed Charges ◽  
Beam Voltage ◽  
Deposited Metal

Past: In 1960 Thornley published the first description of SEM studies carried out at low beam voltage (LVSEM, 1-5 kV). The aim was to reduce charging on insulators but increased contrast and difficulties with low beam current and frozen biological specimens were also noted. These disadvantages prevented widespread use of LVSEM except by a few enthusiasts such as Boyde. An exception was its use in connection with studies in which biological specimens were dissected in the SEM as this process destroyed the conducting films and produced charging unless LVSEM was used.In the 1980’s field emission (FE) SEM’s came into more common use. The high brightness and smaller energy spread characteristic of the FE-SEM’s greatly reduced the practical resolution penalty associated with LVSEM and the number of investigators taking advantage of the technique rapidly expanded; led by those studying semiconductors. In semiconductor research, the SEM is used to measure the line-width of the deposited metal conductors and of the features of the photo-resist used to form them. In addition, the SEM is used to measure the surface potentials of operating circuits with sub-micrometer resolution and on pico-second time scales. Because high beam voltages destroy semiconductors by injecting fixed charges into silicon oxide insulators, these studies must be performed using LVSEM where the beam does not penetrate so far.

MASS TRANSPORT AT THE LASERGLAZING OF METALS

1984 ◽  
Vol 45 (C2) ◽  
pp. C2-285-C2-288
Author(s):  
I. B. Borovskii ◽  
D. D. Gorodskii ◽  
I. M. Sharafeev
Keyword(s):  
Mass Transport

Computer Simulation of the Response of Amperometric Biosensors in Stirred and non Stirred Solution

2003 ◽  
Vol 8 (1) ◽  
pp. 3-18 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
J. Kulys
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Finite Difference ◽  
Mass Transport ◽  
Enzyme Reaction ◽  
Analyte Concentration ◽  
Amperometric Biosensors ◽  
Finite Difference Technique ◽  
Enzyme Layer ◽  
Biosensor Response

A mathematical model of amperometric biosensors has been developed to simulate the biosensor response in stirred as well as non stirred solution. The model involves three regions: the enzyme layer where enzyme reaction as well as mass transport by diffusion takes place, a diffusion limiting region where only the diffusion takes place, and a convective region, where the analyte concentration is maintained constant. Using computer simulation the influence of the thickness of the enzyme layer as well the diffusion one on the biosensor response was investigated. The computer simulation was carried out using the finite difference technique.

Sign in / Sign up

Export Citation Format

Share Document