Question

which solution is used to preserve specimens?

Answer 1

A good all-around fixing solution and preservative. Commercial 37% formaldehyde (= 100% Formalin) is diluted with seawater to make a 3-5% Formalin solution to which baking soda (sodium bicarbonate) is added as a buffer (to prevent unfavorable increases in acidity) using approximately 40 gms.

Answer 2

Feature in many Instron materials testing systems that limits the maximum force applied to the test article. When Specimen Protect is enabled, the actuator or crosshead moves automatically to ensure the force on the test article remains within the pre-set bounds. It is often used to protect specimens or components during set-up, prior to the setting of operational limits. Specimen Protect only functions in position control mode.