Christmas was declared a us national holiday in what year

August 25, 2021 / Rating: 4.6 / Views: 704

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Why is purple cabbage good for you

The purple color in red cabbage comes from a class of pigment molecules called anthocyanins. In plants the opposite is more common -- color in flowers, for example, attracts insects to pollinate the flower. It turns out that anthocyanins are found in flower petals, leaves (it makes them turn red in the fall! Anthocyanins are plant pigments known as flavenoids and produce red, pink, violet and magenta colors in the various plant parts. The anthocyanidin group (See the sidebar below for the molecule structure) controls the color of the pigment. The electrons of the ring structures interact with incoming light and absorb various frequencies. (See How Light Works for a discussion of absorption.) The molecule shown below appears purplish red because its electrons absorb the yellow, green and blue portions of the visible spectrum. One of the things that changes the color on anthocyanins is the level of acid or alkali (i.e., p H) around the molecule. Because the color of the anthocyanin is affected by the p H of the environment, these molecules can tell you the p H of any substance. If you make an extract of red cabbage juice, it will change color when mixed with solutions of various p H. The anthocyanin turns bright pink in acids, reddish-purple in neutral solutions and green in alkaline or basic solutions. This experiment shows you how to make a p H indicator from red cabbage! The purple color in red cabbage comes from a class of pigment molecules called anthocyanins. In plants the opposite is more common -- color in flowers, for example, attracts insects to pollinate the flower. It turns out that anthocyanins are found in flower petals, leaves (it makes them turn red in the fall! Anthocyanins are plant pigments known as flavenoids and produce red, pink, violet and magenta colors in the various plant parts. The anthocyanidin group (See the sidebar below for the molecule structure) controls the color of the pigment. The electrons of the ring structures interact with incoming light and absorb various frequencies. (See How Light Works for a discussion of absorption.) The molecule shown below appears purplish red because its electrons absorb the yellow, green and blue portions of the visible spectrum. One of the things that changes the color on anthocyanins is the level of acid or alkali (i.e., p H) around the molecule. Because the color of the anthocyanin is affected by the p H of the environment, these molecules can tell you the p H of any substance. If you make an extract of red cabbage juice, it will change color when mixed with solutions of various p H. The anthocyanin turns bright pink in acids, reddish-purple in neutral solutions and green in alkaline or basic solutions. This experiment shows you how to make a p H indicator from red cabbage!

date: 25-Aug-2021 22:00next


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