Studies on the effectiveness of cranberry juice for preventing or treating UTIs have produced mixed results. The red berry contains a tannin that prevents E. coli bacteria - the most common cause of urinary tract infections - from sticking to the walls of the bladder, where they can cause infection.
primary color for pigments - any of three pigments from which all colors can be obtained by mixing; the primary colors for pigments are red, blue, and yellow. primary colour for pigments. primary color, primary colour - any of three colors from which all others can be obtained by mixing.
What are primary colors? A common definition is that primary colors are the colors that can be used to make all other colors, and that the primary colors cannot be made by mixing any colors. Most elementary school instructors teach that red, yellow, and blue are the primary colors. All parts of this definition are either wrong or inadequate. First: there is no one set of colors that can produce all other colors. Almost any three or more colors can be mixed to produce all the other hues.