This invention provides a method for preparing a liquid composition of N-N–L-\u03b1-aspartyl-L-phenylalanine 1-methyl ester comprising the steps of providing a liquid carrier; and mixing N-N–L-\u03b1-aspartyl-L-phenylalanine 1-methyl ester with said liquid carrier in a ratio of up to 3:2 by weight to produce a liquid composition. When a session is suspended, its state is captured and persistently stored as a session image in a data repository, and the session is terminated. In one aspect, the fixed members and moveable members collectively form a stack of members in which a moveable member is positioned adjacent each fixed member. The active documents operate on a network in a context of strings, streams and parse trees, which allows programs to be embedded in documents, and since the documents are structured, the programs have the same syntax as documents. The apparatus includes multiple spacers that together allow for increased range of adjustment and ease of installation. The silicone rubber layer has a high heat conductivity and long-term temperature durability.