FITC (389 g/mol) was one of the first dyes which was used for fluorescence microscopy and served as an origin for further fluorescent dyes like Alexa FluorÂ®488. Its fluorescence activity is due to its large conjugated aromatic electron system, which is excited by light in the blue spectrum.
Body odor is not catching. If the body odor is due to an infection, the infection may be contagious, such as a sexually transmitted disease. Inherited conditions may be passed on to children through the genes.ody odor is the term used for any unpleasant smell associated with a person's body. People usually associate body odor with sweat, but sweat by itself does not give off an odor.
Constipation can cause bad body odor, and almost always does. This is because when one has constipation, food takes too long to pass through the intestines. When food sits in the intestines for a day or even longer in some cases, certain toxins are reabsorbed, and these cause various odors, none of which are pleasant.