Tobacco use. Smoking is one of the most important risk factors for pancreatic cancer. The risk of getting pancreatic cancer is about twice as high among smokers compared to those who have never smoked. About 20% to 30% of pancreatic cancers are thought to be caused by cigarette smoking.
Silicon dioxide is found naturally in many plants, such as: leafy green vegetables; beets; bell peppers; brown rice; oats; alfalfa; Silicon dioxide is also added to many foods and supplements. As a food additive, it serves as an anticaking agent to avoid clumping. In supplements, itâs used to prevent the various powdered ingredients from sticking together. As with many food additives, consumers often have concerns about silicon dioxide as an additive.
Silicon dioxide reacts with elemental silicon at high temperatures to produce SiO: SiO 2 + Si â 2 SiO Water solubility. The solubility of silicon dioxide in water strongly depends on its crystalline form and is three-four times higher for silica than quartz; as a function of temperature, it peaks around 340 Â°C. This property is used to grow single crystals of quartz in a hydrothermal process where natural quartz is dissolved in superheated water in a pressure vessel that is cooler at the top.