The technique that identifies the amino acid composition of small peptides is amino acid analysis. This process involves hydrolyzing the peptide into its constituent amino acids, which are then separated and quantified, usually by high-performance liquid chromatography (HPLC) or capillary electrophoresis. These methods can accurately determine the types and amounts of amino acids present in the peptide. Prior to analysis, peptides are typically hydrolyzed with strong acids, like 6N hydrochloric acid, under high temperature, which breaks the peptide bonds. Post-hydrolysis, the free amino acids are derivatized to make them more detectable by the chosen analytical method. This technique is crucial not only for understanding the composition of peptides but also for verifying the purity and composition of synthesized peptides and proteins. However, it is worth noting that amino acid analysis does not provide information about the sequence of the peptide or the location of any post-translational modifications.

Titanium dioxide is widely used in soap making as a whitening agent, giving soaps a bright, opaque appearance. To incorporate it into your soap, first disperse the titanium dioxide in a small amount of oil from your recipe or water for melt and pour soaps. This step prevents clumps and ensures even distribution within the soap batter. Use about 1 teaspoon per pound of oils for cold process soaps, adjusting based on the desired level of whiteness. It's important to add the dispersed titanium dioxide to your soap batter at light trace to achieve a uniform color. For melt and pour bases, mix well and pour as usual. Always wear protective gear, such as gloves and a mask, when handling titanium dioxide powder.

The term "PVC accessories" refers to various items made from polyvinyl chloride (PVC), a widely used plastic polymer. PVC accessories can include a range of products such as piping, fittings, window frames, and more. When the question asks if PVC accessories are the molding, it seems to inquire about the manufacturing process of these items. PVC accessories are indeed often produced through molding processes. Molding involves heating and shaping the PVC material into specific forms using molds. Two common methods are injection molding and compression molding. Injection molding forces molten PVC into a mold cavity under high pressure, while compression molding uses heat and pressure to shape PVC powder into the desired form. Both techniques enable the efficient production of precise and consistent PVC accessory shapes. Given the versatility and durability of PVC, using molding processes ensures that these accessories meet industry standards for quality and performance.