The phrase "alternate in between" is not correct in standard written English.
It is generally redundant, as "alternate" implies a change or switch, and "in between" adds unnecessary complexity.
Example: "You can alternate between different tasks to stay engaged."
Alternatives: "switch between" or "alternate among."
The culture density and the salt content of the experiment conducted April 2014 alternated in between OD 0.5 and 1.3 and 15 25 mS/cm, respectively, but no significant change in Y was monitored, it was therefore concluded that cell density and salinity seem to have only a small influence at best.
Bands of grain alternate in different pieces between sea green and cranberry or orange, yellow and gold and other luscious combinations.
In MBs, participants had to alternate in an unpredictable manner between performance of both of the tasks (M block).
For more than four decades the Pakistan Peoples party (PPP) and the Pakistan Muslim League (Nawaz) have alternated in power between periods of military rule.
The checkerboard pattern alternated in time between the test color and a gray background at a rate of 200 ms per frame (i.e., 2.5 Hz or 5 frames per second in square wave).
The man and woman whose points-of-view we alternate between in Flynn's book are both so unlikable, it was difficult for me to keep reading.
Chinese regulators have alternated in the last year between pumping up the economy and deflating it.
Along the two Ligurian rivieras, on either side of Genoa, the coast alternates in rapid succession between high, rocky zones and level gravel.
Furthermore, we specifically modeled subjects' behavior in the Alternate condition, in distinguishing between the detour and routine parts of their walk.
In a typical staggered wall structure, columns exist along the perimeters in the longitudinal direction and the connecting beams are located in alternate floors between two staggered walls.
