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Oxygen pretreatment effect

The conjugation effect upon the activity of a C=0 bond is reinforced by the oxygen pretreatment and the longerthe oxygen pretreatment is, the strongerthe differences between the above considered hydrogenations are. [Pg.302]

The role of thyroid hormone in the response of the heart to ischemia and reperfusion has not been extensively investigated due to the fact that thyroid hormone accelerates heart rhythm and increases oxygen consumption, effects which could be detrimental in the setting of ischemia and reperfusion. However, accumulating experimental evidence shows that either acute or chronic pretreatment with thyroid hormone can lead to cardioprotection. In an isolated working rat heart model, cardiac work and cardiac efficiency were increased after no-flow global ischemia and reperfusion in hearts acutely pretreated with Tr74 Furthermore, thyroxine pretreatment for two weeks resulted in increased recovery of function in isolated rat hearts subjected to zero-flow... [Pg.86]

Effect of oxygen pretreatment temperature on the amount of desorbed oxygen ... [Pg.120]

The HPLP apparatus has been used to study the hydrogenation of carbon monoxide on iron and rhodium polycrystalline specimens as well as on sit e crystals and various rhodium compounds." Postreaction surface analysis revealed the presence of a catalytically active carbonaceous layer on all the samples investigated. In addition, precise control of the rhodium surface oxidation state by oxygen pretreatment in the UHV chamber was found to have a marked effect on the product distribution of the rhodium catalyzed reaction. [Pg.648]

Improved feedstock pretreatment is important to minimize catalyst consumption and reduce subsequent spent-catalyst handling requirements. Selective hydrogenation of dienes can be used to reduce acid consumption, both in HF and H2SO4 alkylation (29). More effective adsorptive treating systems have been appHed to remove oxygen-containing contaminants that are frequently introduced in upstream processing steps. [Pg.47]

In almost all industrial circumstances, a deaerator is a cost-effective oxygen-removing proposition that complements primary pretreatment equipment such as water softeners. [Pg.161]

See other pages where Oxygen pretreatment effect is mentioned: [Pg.9]    [Pg.302]    [Pg.78]    [Pg.146]    [Pg.31]    [Pg.54]    [Pg.54]    [Pg.301]    [Pg.206]    [Pg.332]    [Pg.146]    [Pg.348]    [Pg.235]    [Pg.118]    [Pg.123]    [Pg.74]    [Pg.340]    [Pg.437]    [Pg.160]    [Pg.139]    [Pg.270]    [Pg.56]    [Pg.241]    [Pg.57]    [Pg.87]    [Pg.274]    [Pg.236]    [Pg.587]    [Pg.132]    [Pg.332]    [Pg.423]    [Pg.56]    [Pg.57]    [Pg.65]    [Pg.9]    [Pg.10]    [Pg.711]    [Pg.923]    [Pg.284]    [Pg.201]    [Pg.74]    [Pg.116]   


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Oxygen effect

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