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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.
Iron deficiency protects against infection by creating an unfavorable environment for bacterial growth. Nevertheless, while iron deficiency might lessen infections by certain pathogenic diseases, it also leads to a reduction in resistance to other strains of viral or bacterial infections, such as Salmonella typhimurium or Entamoeba histolytica ...
Geritol is a brand name for several vitamin complexes plus iron or multimineral products in both liquid form and tablets containing from 9.5 to 18 mg of iron per daily dose. [2] The name conveys a connection with aging, as in "geriatric." The product has been promoted from almost the beginning of the mass media era as a cure for "iron-poor ...
Bromothymol blue is the indicator used in the agar, it changes to yellow in case of acid production during fermentation of lactose or changes to deep blue in case of alkalinization. Lactose-positive bacteria build yellow colonies. Bacteria which decarboxylate L-cystine cause an alkaline reaction and build deep blue colonies. [1]
Oral iron supplementations are the first line of care for iron deficiency and iron deficiency anaemia. Anaemic patients are treated with iron tablets containing 100 mg to 200 mg of iron. [ 7 ] Oral iron tablets are not easily tolerated and may cause nausea, vomiting, abdominal pain, constipation and diarrhoea. [ 7 ]
The increase in pH then causes color change in the bromothymol blue indicator, turning it blue. Under neutral conditions the medium remains a green color. The color change to blue is useful because growth on Simmons' citrate agar is often limited and would be hard to observe if it were not for the color change.
Red Dye No. 3 is an artificial food coloring derived from petroleum, commonly added to foods, drinks, supplements and drugs to create an appealing cherry-red or pink hue.
H + + Bromothymol blue (Blue) → Bromothymol blue-H + (Yellow) Elevated protein concentrations produce slightly elevated specific density results as a consequence of the indicator's protein error; in addition, samples with a pH above 6.5 give lower readings as a result of the indicator's bias.