The quality of store-bought purple dyes varies widely depending on the brand and intended use (fabric, hair, craft, etc.). High-quality brands tend to offer vibrant, long-lasting colors, whereas cheaper options may fade quickly or not adhere well. For fabrics, look for dyes specifically formulated for the material you're coloring to ensure good results. For hair, professional-grade dyes usually yield better outcomes than generic brands. Reading reviews and researching can guide you to the best product for your needs. Always follow the application instructions carefully to achieve the desired effect.

Yes, bark is primarily composed of cellulose, along with other materials such as lignin, which provides support and rigidity. Cellulose is a complex carbohydrate and the most abundant organic polymer on Earth, forming the cell walls of plants, including trees. The bark of a tree serves as a protective layer, and its cellulose content contributes to this function by providing structural support. Additionally, the inner layers of bark, which are involved in nutrient transport, also contain cellulose, albeit in a less condensed form than the outer layers. Beyond its structural role, the cellulose in bark is integral to the tree's overall health and growth, playing a key role in water and nutrient transport.

The molar mass of anatase titanium dioxide (TiO2) can be calculated by summing the atomic masses of titanium and oxygen, found in the periodic table. Titanium has an atomic mass of approximately 47.867 g/mol, and oxygen has an atomic mass of about 15.999 g/mol. Since TiO2 consists of one titanium atom and two oxygen atoms, its molar mass is calculated as follows: \(47.867 g/mol + 2 \times 15.999 g/mol = 79.865 g/mol.\) Thus, the molar mass of anatase titanium dioxide is approximately 79.865 grams per mole. This property is crucial in various applications, including photocatalysis, where the efficacy of TiO2 is influenced by its molecular weight among other factors.

Yes, Titanium dioxide (in food) has been banned in some countries. As of 2020, France banned the use of titanium dioxide in food production due to uncertainties about its potential health risks.