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Related to deoxyhaemoglobin: Deoxyhemoglobin


n. desoxihemoglobina, forma reducida de hemoglobina que ocurre cuando la oxihemoglobina pierde el oxígeno.
References in periodicals archive ?
The central part contains areas of high signal on T1 and T2WI reflecting oxidised haemoglobin with darker areas on T1weighted images due to deoxyhaemoglobin.
Interactions of Porphyromonas gingivalis with oxyhaemoglobin and deoxyhaemoglobin.
Lack of oxygen causes the initial change to deoxyhaemoglobin (blue), followed by the production of haemosederin (bluish-black to brown).
The presence of deoxyhaemoglobin in the tissue being imaged therefore perturbs the magnetic field, resulting in a signal loss as measured by T2*-weighted MR imaging.
Maximal or minimum values during the exercise period were used to determine absolute concentration changes for deoxyhaemoglobin ([DELTA]HHb), oxyhaemoglobin (DELTA]O2Hb), total haemoglobin (DELTA]cHb), and tissue oxygenation index (TOI, the ratio of oxygenated to total tissue haemoglobin) and normalised tissue haemoglobin index (nTHI, the relative concentration of total haemoglobin).
This interference is due to the peak light absorption of PBV (638 nm (22)) and ISB (646 nm (23)) being very close to the 660 nm calibration for deoxyhaemoglobin.
The contrast in fMRI is a consequence of the higher ratio of oxy- to deoxyhaemoglobin that accompanies neuronal activation in local draining venules and veins and is known as the blood oxygenation level dependent (BOLD) signal.
In the cortical regions activated, the partial oxygen blood pressure decreases the deoxyhaemoglobin levels, thus reducing the local magnetic field measured using MRI methods, which makes it possible to detect any changes in the signals occurring in the zones involved (this is the BOLD effect: the Blood Oxygen Level Dependent contrast effect).
2] in the system leads to the dissociation of oxy-haemoglobin producing deoxyhaemoglobin and liberated [O.
Active neurones extract oxygen from the blood at a greater rate than adjacent inactive neurones, resulting in localised increased levels of deoxyhaemoglobin compared with oxyhaemoglobin.
The absorption of oxyhaemoglobin and deoxyhaemoglobin at these two wavelengths is very different.