Effect of spring oilseed rape crop density on plant root biomass and ... by Cepuliene, Rita; Marcinkeviciene, Ausra; Velicka, Rimantas; Kosteckas, Robertas; Pupaliene, Rita / Estonian Journal of Ecology.
A study in Washington State gathered 154 first to fifth graders from two elementary schools. The students were given four gummy bears made with either xylitol or maltitol (types of sugars used in many types of sugarless chewing gum) three times a day during school hours. All were checked for plaque and bacteria in their mouths at the start of the study and six weeks later.
1 Ancient Mayans (in South America) chewed chicle which was made from the sap of the sapodilla tree. 2  North American Indians chewed sap from spruce trees. 3  Chewing gum was made and sold in America from 1848 but it was very different to the gum we know today. 4  It was made from spruce gum. Chewing gum was made and sold in America from 1848 but it was very different to the gum we know today. 2  It was made from spruce gum. 3  Mr Thomas Adams first introduced chewing gum made out of chicle in 1871.