Radical Cage Effects in the Photochemical Degradation of Polymers:  Effect of Radical Size and Mass on the Cage Recombination Efficiency of Radical Cage Pairs Generated Photochemically from the (CpCH2CH2N(CH3)C(O)(CH2)nCH3)2Mo2(CO)6(n= 3, 8, 18) Complexes

2003 ◽  
Vol 125 (34) ◽  
pp. 10319-10326 ◽  
Author(s):  
Erick Schutte ◽  
T. J. R. Weakley ◽  
David R. Tyler
Keyword(s):  
Photochemical Degradation ◽  
Recombination Efficiency ◽  
Cage Effects

Cage Effects in the Photochemical Degradation of Polymers. Studies of Model Complexes with Different Chain Lengths

1997 ◽  
Vol 30 (20) ◽  
pp. 6404-6406 ◽  
Author(s):  
Jonathan L. Male ◽  
Britt E. Lindfors ◽  
Katharine J. Covert ◽  
David R. Tyler
Keyword(s):  
Photochemical Degradation ◽  
Model Complexes ◽  
Chain Lengths ◽  
Cage Effects

Radical Cage Effects in the Photochemical Degradation of Polymers:  In-Cage Trapping of Photochemically Generated Radical Cage Pairs in Polymer Model Compounds

1999 ◽  
Vol 32 (12) ◽  
pp. 3898-3906 ◽  
Author(s):  
Jonathan L. Male ◽  
Myungok Yoon ◽  
Anne G. Glenn ◽  
T. J. R. Weakley ◽  
David R. Tyler
Keyword(s):  
Photochemical Degradation ◽  
Polymer Model ◽  
Model Compounds ◽  
Cage Effects

The Malleable Excited States of Benzothiadiazole Dyes and Investigation of their Potential for Photochemical Control

2019 ◽  
Author(s):  
Caroline C. Warner ◽  
andrea thooft ◽  
Bryan J. Lampkin ◽  
selin demirci ◽  
Brett VanVeller
Keyword(s):  
Excited State ◽  
Excited States ◽  
Polar Solvent ◽  
Nonpolar Solvent ◽  
Photochemical Degradation ◽  
Solvent Lead ◽  
Environmentally Sensitive

<p>A strategy to control the efficiency of a photocleavage reaction based on changing the nature of the excited state is presented. A novel class of photoactive compounds has been synthesized by combining the classical o-nitrobenzyl scaffold with an environmentally sensitive dye, 4-amino-nitrobenzothiazole. Irradiation in a polar solvent lead to an excited state that is inoperative for photochemistry whereas excitation in a nonpolar solvent lead to an excited state that is photochemically active. A photochemical degradation appears to be the preferred process in contrast to the intended photocleavage process.</p>

Bearing Performance Limits With Grease Lubrication

2005 ◽  
Author(s):  
P. M. Cann ◽  
A. A. Lubrecht
Keyword(s):  
Surface Damage ◽  
Design Parameters ◽  
Performance Limits ◽  
Grease Lubrication ◽  
Lubricated Contacts ◽  
System A ◽  
Operating Limits ◽  
Bearing Design ◽  
Cage Effects ◽  
Efficient Mechanisms

This paper has examined the influence of bearing design and operation in controlling lubricant supply to the contact zone. Grease lubricated contacts are liable to starvation and as a result the film thickness is reduced, this can result in surface damage or premature bearing failure. It is of obvious importance to know when starvation occurs and the effect of grease type, bearing design and operation on lubrication replenishment. The aim therefore is to develop a starvation parameter capable of predicting the operating limits for a particular bearing/grease system. A number of bearing design parameters are examined in the paper, these include cage design, ball spin and bearing size. Ball spin and cage effects can be efficient mechanisms for maintaining the lubricant supply to the track. Increased bearing size, line contact geometries and high load result in reduced lubricant replenishment of the contact. Using this analysis it will be possible to establish operating limits for families of bearings.

Increasing the homologous recombination efficiency of eukaryotic microorganisms for enhanced genome engineering

2019 ◽  
Vol 103 (11) ◽  
pp. 4313-4324 ◽  
Author(s):  
Ying Ding ◽  
Kai-Feng Wang ◽  
Wei-Jian Wang ◽  
Yi-Rong Ma ◽  
Tian-Qiong Shi ◽  
...  
Keyword(s):  
Homologous Recombination ◽  
Genome Engineering ◽  
Recombination Efficiency ◽  
Eukaryotic Microorganisms

Effect of chelation in alkoxide precursors of niobium oxide nanoparticles on photochemical degradation of rhodamine B

2021 ◽  
Vol 98 (2) ◽  
pp. 319-334
Author(s):  
Subia Ambreen ◽  
N. D. Pandey ◽  
Arti Chouhan ◽  
Hemaunt Kumar ◽  
Ashutosh Pandey
Keyword(s):  
Rhodamine B ◽  
Niobium Oxide ◽  
Oxide Nanoparticles ◽  
Photochemical Degradation ◽  
Alkoxide Precursors
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