Free hemoglobin (fHb) may induce vasoconstriction by scavenging nitric oxide.It may increase in older blood units due to storage lesions.This study evaluated whether old red blood cell transfusion increases plasma fHb in sepsis and how the microvascular response may be affected.This is a secondary analysis of a randomized study.Twenty adult septic
In underwater navigation, sonars are useful sensing devices for operation in confined or structured environments, enabling the detection and identification of underwater environmental features through the acquisition of acoustic images.Nonetheless, in these environments, several problems affect their performance, such as background noise and multip
Brain tissue is highly dynamic in terms of electrical activity and energy demand.Relevant energy metabolites have turnover times ranging from milliseconds to seconds and are rapidly exchanged between cells and within cells.Until recently these fast metabolic events were inaccessible, because standard isotopic techniques require use of מזון popu