Infobox references. Bromothymol blue (also known as bromothymol sulfone phthalein and BTB) is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7). A common use is for measuring the presence of carbonic acid in a liquid.

What is BTB in biology?

BTB may refer to: In biology: Blood–testis barrier or Blood–thymus barrier, in testicular anatomy. Bovine tuberculosis or Mycobacterium bovis, a disease originating in cattle. Breakthrough bleeding, of the menstrual period.

What does BTB indicate the presence of?

Bromothymol blue solution, BTB, can indicate the presence of carbon dioxide in the water. When little or no carbon dioxide is present, BTB will show a blue color. Depending upon the amount of carbon dioxide, BTB will change to green or yellow. Yellow indicates more carbon dioxide.

What is the meaning of Bromothymol?

: a dye derived from thymol that is an acid-base indicator.

What is the function of BTB?

The BTB domain (also known as the POZ domain) is a versatile protein-protein interaction motif that participates in a wide range of cellular functions, including transcriptional regulation, cytoskeleton dynamics, ion channel assembly and gating, and targeting proteins for ubiquitination.

Is BTB blue?

BTB is a weak acid and it is almost red in color. However, when it reacts with acidic solution then it turns into yellow color and blue color after reacting with alkaline solution. At neutral pH (7.0) it shows bluish green color.

How does algae use cellular respiration?

Algae perform cellular respiration which uses carbon dioxide. This would capture CO2, decreasing the amount in the atmosphere.

What does it mean when BTB turns yellow?

BTB is an acid indicator; when it reacts with acid it turns from blue to yellow. When carbon dioxide reacts with water, a weak acid (carbonic acid) is formed (see chemical reaction below). The more carbon dioxide you breathe into the BTB solution, the faster it will change color to yellow.

What does CG mean in physical therapy?

For example, the Physical Therapy abbreviation SBA (stand by assist) or CGA ( contact guard assist ) are common PT medical abbreviations.

Does phenolphthalein turn pink?

Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.

What color does phenolphthalein turn in a base?

Phenolphthalein is an indicator — a chemical which changes colour depending on whether it meets an acid or a base. It turns purple if it meets something basic, such as ammonia; it stays colourless if it meets an acid like vinegar or a neutral substance like water.

Is Bromothymol blue acid or base?

Bromothymol blue is an acidic pH chromoionophore where acid to base change corresponds to its neutral to anionic form, respectively. For this reason it can be electrostatically immobilized on the surface on anion-exchanger resin like Amberlite IRA 401. Solutions of different concentration of the indicator were used.