In what context is the term "Chemical Postmortem Change" used?

The term "Chemical Postmortem Change" refers specifically to the alterations in body composition that occur after death. After an individual has passed away, various biochemical processes continue to take place, leading to significant changes in the body. These alterations can include the breakdown of cells and tissues, changes in pH levels, and the release of gases and fluids from the body as decomposition begins. This concept is critical in fields such as forensic science and anthropology, as understanding these changes can aid in estimating the time of death and the circumstances surrounding it.

In regards to the other options, changes in blood circulation before death relate to physiological processes that occur while the body is still alive. Gas release in living tissues involves metabolic processes that are active during life and do not pertain to postmortem changes. Unexplained changes in skin texture do not specifically relate to the biochemical alterations that occur after death, thus they do not capture the essence of "Chemical Postmortem Change."