Reduction kinetics and carbon deposit for Cu-doped Fe-based oxygen carriers: role of Cu

2021 ◽  
pp. 117406
Author(s):  
Guida Li ◽  
Wenxing Yao ◽  
Yunlei Zhao ◽  
Bo Jin ◽  
Jianyong Xu ◽  
...  
Keyword(s):  
Carbon Deposit ◽  
Reduction Kinetics ◽  
Oxygen Carriers

Catalytic Decomposition of Ethylene on Nanocrystalline Cobalt

2007 ◽  
Vol 128 ◽  
pp. 249-254 ◽  
Author(s):  
Urszula Narkiewicz ◽  
Marcin Podsiadły ◽  
Iwona Pełech ◽  
Waleran Arabczyk ◽  
M.J. Woźniak ◽  
...  
Keyword(s):  
Activation Energy ◽  
Apparent Activation Energy ◽  
Reduction Process ◽  
Catalytic Decomposition ◽  
Carbon Deposit ◽  
Reduction Kinetics

Nanocrystalline cobalt was carburised with ethylene in the range 340– 500°C to obtain Co(C) nanocapsules. The carbon deposit was reduced by a flow of hydrogen in the range 500– 560°C. The reduction kinetics were studied using thermogravimetry, described by the equation: α = Α[1-exp(-kt)n]. The apparent activation energy of the reduction process of the carbon deposit was determined. After carburisation and reduction the samples were examined by XRD and HRTEM.

ROLE OF REDOX POTENTIAL OF HEMOGLOBIN-BASED OXYGEN CARRIERS ON METHEMOGLOBIN REDUCTION BY PLASMA COMPONENTS

2002 ◽  
Vol 30 (1) ◽  
pp. 39-51 ◽  
Author(s):  
Scott C. Dorman ◽  
Clare F. Kenny ◽  
Lee Miller ◽  
Rhoda Elison Hirsch ◽  
John P. Harrington
Keyword(s):  
Redox Potential ◽  
Oxygen Carriers

Possible Role of Artificial Oxygen Carriers in Transfusion Medicine: A Retrospective Analysis on the Current Transfusion Practice

2009 ◽  
Vol 33 (2) ◽  
pp. 127-132 ◽  
Author(s):  
Fumiaki Yoshiba ◽  
Akira T. Kawaguchi ◽  
Osamu Hyodo ◽  
Takaaki Kinoue ◽  
Sadaki Inokuchi ◽  
...  
Keyword(s):  
Retrospective Analysis ◽  
Transfusion Practice ◽  
Transfusion Medicine ◽  
Oxygen Carriers ◽  
Artificial Oxygen Carriers

Abstract 17692: Arrhythmogenic Mechanisms in Hemorrhagic Shock-induced Heart and Comparable Effect of Different Hemoglobin Concentration of Two Artificial Oxygen Carriers

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Bonpei Takase ◽  
Yuko Higashimura ◽  
Yoshihiro Tanaka ◽  
Kenichi Hashmoto
Keyword(s):  
Hemorrhagic Shock ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Electrophysiological Study ◽  
Hemoglobin Concentration ◽  
Conduction Delay ◽  
Oxygen Carriers ◽  
Artificial Oxygen Carriers ◽  
Ventricular Electrical Remodeling

Lethal ventricular arrhythmias (VT/VF) are serious complications after resuscitation of severe hemorrhagic shock (HS). To investigate mechanisms of arrhythmogenesis after HS and a role of two different concentration of oxygenated liposome-encapsulated human hemoglobin (LHb [Hgb=6g] or HbV [Hgb=10g]), optical mapping analysis (OMP) and electrophysiological study (EPS) were performed using rat HS model. HS was induced by withdrawing 30% blood from aorta (shock alone). Rats were resuscitated by transfusing saline, 5% albumin (5%ALB), LHb, HbV or oxygenated autologous washed red blood cells (wRBC: n=7, per group). After excising heart, OMP and EPS were performed in isolated Langendorff-perfused hearts. OMP revealed abnormal ventricular conduction delay (VCD) with impaired action potential duration dispersion (APDd) in both ventricles in shock alone, saline, and 5%ALB whereas VCD and APDd were substantially attenuated in LHb, HbV or wRBC (a). VT/VF was easily provoked by burst pacing stimulus to LV in saline and 5%ALB while few VT/VF was induced in LHb, LbV or wRBC (b). Conclusion: Ventricular electrical remodeling of abnormal VCD and APDd after HS causes VT/VF. LHb, LbV and wRBC comparably prevent VT/VF possible by attenuating ischemia-reperfusion injury in HS. Especially, even low concentration of hemoglobin in LHb is comparably effective with closely normal concentration of HbV.

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