scholarly journals Spontaneous reactivation and aging kinetics of acetylcholinesterase inhibited by dichlorvos and diazinon

2011 ◽  
Vol 36 (2) ◽  
pp. 237-241 ◽  
Author(s):  
Kasim Abass Askar ◽  
A. Caleb Kudi ◽  
A. John Moody
Keyword(s):  
Aging Kinetics ◽  
Kinetics Of ◽  
Spontaneous Reactivation

scholarly journals Animal hygiene assessment by spontaneous reactivation and aging kinetics of pesticide compounds

2014 ◽  
Vol 9 (2) ◽  
pp. 29-41
Author(s):  
A. Nkhwa ◽  
Najdat Ali Al-Kadhi ◽  
Mohammed Talat Abass ◽  
Kasim Sakran Abass
Keyword(s):  
Aging Kinetics ◽  
Kinetics Of ◽  
Spontaneous Reactivation

STRENGTHENING FEATURES AND AGING KINETICS OF HIGH-STRENGTH CAST ALUMINUM ALLOY AL4MS BASED ON Al–Si–Cu–Mg SYSTEM

2021 ◽  
pp. 24-34
Author(s):  
E.N. Kablov ◽  
◽  
E.V. Belov ◽  
A.V. Trapeznikov ◽  
A.A. Leonov ◽  
...  
Keyword(s):  
High Strength ◽  
Cast Aluminum Alloy ◽  
High Plasticity ◽  
Cast Aluminum ◽  
Second Stage ◽  
Low Temperature Aging ◽  
Aging Kinetics ◽  
Kinetics Of ◽  
Cold Box ◽  
Temperature Aging

Based on the conducted research, it has been found that quenching with hot isostatic pressure and step-by-step aging with consistently increasing temperatures of low-temperature aging (first stage) and high-temperature aging (second stage) provides high tensile strength for AL4MS copper silumin during cold box casting, increases the flow stress by 10%, and maintains high plasticity compared to the level of properties after single-stage aging.

Advantage of In-situ over Ex-situ techniques as reliability tool: Aging kinetics of Imec’s MCM-D discrete passives devices.

2003 ◽  
Vol 43 (9-11) ◽  
pp. 1785-1790
Author(s):  
P. Soussan ◽  
G. Lekens ◽  
R. Dreesen ◽  
W. De Ceuninck ◽  
E. Beyne
Keyword(s):  
Ex Situ ◽  
Aging Kinetics ◽  
Kinetics Of

scholarly journals Thermal Kinetics of SiCp Reinforced Al-Zn-Mg-Cu Alloy Composite

2021 ◽  
Author(s):  
Saikat Das ◽  
R. Govinda Rao ◽  
Prasanta Kumar Rout
Keyword(s):  
Base Alloy ◽  
Accelerated Aging ◽  
Stir Casting ◽  
Hardness Profile ◽  
Scanning Calorimetry ◽  
Transmission Electron ◽  
The Matrix ◽  
Aging Kinetics ◽  
Aging Phenomena ◽  
Kinetics Of

Abstract In the present work, the artificial aging kinetics of SiCp particles reinforced AA7075-SiCp composite fabricated by stir casting method was investigated. The aging behavior of AA7075-SiCp composite was investigated by Rockwell hardness tests and differential scanning calorimetry (DSC). Results show there are no changes in the sequences of formation and dissolution of precipitate. Reinforced particles are uniformly distributed throughout the matrix. The hardness profile shows increase in hardness with the comparison of AA7075 base alloy. In addition to SiCp in the matrix, precipitation kinetics has changed compared with base alloy since higher dislocations present in composite, hence requires lower activation energy to form ή precipitate and takes less time to reach the maximum hardness. In contrast, the addition of SiCp at low volume percent also showing accelerated aging phenomena in the composite during the aging process. High-resolution transmission electron microscope (HRTEM) micrograph of peak age (T6) condition divulges that enormous fine and plate-like ή (MgZn2) precipitates are uniformly distributed in the composite.

Influence of Initiation Site and Lamellar Divergency on the Overall Kinetics of Cellular Growth and Coarsening in Aged U-Nb Alloys

2018 ◽  
Vol 941 ◽  
pp. 863-868
Author(s):  
Robert E. Hackenberg ◽  
Megan G. Emigh ◽  
Pallas A. Papin ◽  
Ann M. Kelly ◽  
Robert T. Forsyth ◽  
...  
Keyword(s):  
Growth Rate ◽  
Initiation Site ◽  
Nucleation Site ◽  
Cellular Growth ◽  
Constant Growth Rate ◽  
Rate Behavior ◽  
Apparent Activation Energies ◽  
Aging Kinetics ◽  
Kinetics Of ◽  
Overall Kinetics

Overall kinetics of lamellar overaging reactions in U-5.5Nb and U-7.5Nb were analyzed by Avrami-Arrhenius analyses of volume fractions measured from an extensive temperature-time (T-t) matrix of specimens. The cellular initiation site (grain boundaries, inclusions) and regimes of lamellar divergency-cum-slowing growth rate were explicitly accounted for. Avrami exponents n from T-t regimes of constant-growth rate were consistent with theory (1<n<3); those from divergent T-t regimes were smaller, n~0.7, which is not surprising given their different growth rate behavior. The apparent activation energies Q were similar for grain-boundary and inclusion-nucleated discontinuous precipitation, indicating that their nucleation site does not alter their overall kinetics. Avrami Analysis of Isothermal Aging Kinetics

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