Yes, investigator b can use the specimens for cancer research without re-consent if the specimens are de-identified.
De-identification is the process of removing identifiers from human subject research specimens for the sake of privacy for research participants and to avoid leaking personal information.
<span>Since the specimen has been de-identified it can not longer be connected to a specific individual. Thus, his/her identity is safe.
I attached the document I read that is the basis of my answer. </span>
The ductus arteriosus allows fetal blood to move from the pulmonary trunk into the aorta. The ductus venosus on the other hand is a fetal vessel that transports blood from the umbilical vein to the inferior venacava. Ductus arteriosus is a blood vessel connecting the main pulmonary artery to the proximal descending aorta. It allows most of the blood from the right ventricle to bypass the fetus's fluid-filled non-functioning lungs.
The energy from cellular respiration comes from food and air. The reactants first cellular respiration are oxygen and glucose. Glucose is a form of sugar and comes from food, and oxygen is found in air.
The main reactants or cellular respiration, as stated above, are oxygen and glucose.
During the first stage of cellular respiration, which takes place in the cytoplasm, a small amount of energy is produced when glucose is broken down into smaller particles.
