Titanium dioxide is a widely used compound in industries like pharmaceuticals, cosmetics, and foods. To clean up spills of titanium dioxide, firstly, ensure you are wearing protective equipment like gloves and masks to avoid inhalation or skin exposure. Collect the spilled material in a clean, dry container, ideally with a non-sparking tool. Try to prevent dusting during the clean-up process. Dispose of the collected material as per local waste disposal regulations. Always remember to clean the area with a damp cloth or mop after the process to ensure no residues are left.

There are 20 standard amino acids that are the building blocks of proteins in organisms. These include essential amino acids that humans must obtain from their diet because the body cannot synthesize them. Apart from these, there are also non-standard amino acids, such as selenocysteine and pyrrolysine, recognized in specific functional contexts, bringing the total to 22. Furthermore, hundreds of other amino acids exist in nature but are not incorporated into proteins; these play roles in various metabolic pathways.

Polypropylene (PP) is a type of thermoplastic polymer that is widely used in a variety of applications, from packaging materials to automotive components. When it comes to its structure, polypropylene can be categorized based primarily on its tacticity, which is the spatial arrangement of the methyl groups attached to the carbon backbone. However, the term "branching" refers to the existence of side chains along the main polymer chain. Traditional polypropylene is not heavily branched; it is primarily a linear polymer. Nonetheless, certain types of polypropylene, such as high-molecular-weight polypropylene, can exhibit some degree of branching. This branching can affect its properties, such as improving its impact resistance. The creation of branched polypropylene is usually achieved through specific catalysts and polymerization processes.