Abstract: A method includes providing a container, introducing a substance into the container, and introducing a readily dissolvable film into the container such that the dissolvable film overlies the substance within the container. An alternative method includes providing a container, providing a readily dissolvable film, the film comprising a substance carried by the film, and introducing the film into the container.

Abstract: A method includes providing a container, introducing a substance into the container, and introducing a readily dissolvable film into the container such that the dissolvable film overlies the substance within the container. An alternative method includes providing a container, providing a readily dissolvable film, the film comprising a substance carried by the film, and introducing the film into the container.

Abstract: A method is provided for extracting and purifying components of biological samples with a two-step process for elution and neutralization of the components from the sample. The separate elution and neutralization steps use adjustment of the buffer pH to improve extraction and purification of the desired components.

Abstract: A method includes providing a container, introducing a substance into the container, and introducing a readily dissolvable film into the container such that the dissolvable film overlies the substance within the container. An alternative method includes providing a container, providing a readily dissolvable film, the film comprising a substance carried by the film, and introducing the film into the container.

Abstract: Eyeglass frame protective coverings are formed on sheets, which make up a cylindrical roll. The roll consists of a plurality of perforated, connected sheets, each sheet containing one protective covering formed on each sheet. Each protective covering is connected to its respective sheet by perforations, which allows the covering to be easily removed from the sheet for use. A bridge section interconnects the two tubular pocket-like temple frame components of the protective covering. The bridge section is configured to be pulled to remove the covering from the sheet and is also perforated at its midpoint, thus allowing the bridge section to be easily separated once the temple frame components are placed on the temple pieces of the eyeglasses. Once separated, the two parts of the bridge section are draped over the temple pieces and are then available to assist in the clean and efficient removal of the two components of the covering, after the components become wet and soiled.