Unusual types of gramophone records that appears when the record is played and viewed at from a certain angle. Additionally, alongside a standard vinyl release, the soundtrack for "" was made available on a holographic record that displays an image of the "Millennium Falcon" on one side and a TIE fighter on the other, both spinning at the speed of the record. The deluxe vinyl edition of Rush's "2112" features a hologram of a spinning Red Star of the Federation. All three of these were produced by Tristan Duke for his studio Infinity Light Science. Unusual types of gramophone records The overwhelming majority of records
Polymer fractionation Polymer fractionation Polymers are chainlike molecules that are made of the same repetition unit. With a few exceptions such as proteins, a polymer consists of a mix of molecules with different chain lengths. Therefore average values are given for the molecular weight like the number average, the weight average or the viscosity average molar mass. A measure for the width of the molecular weight distribution is the polydispersity index. The targeted manipulation of the molecular weight distribution of a polymer by removing short and/or long chain material is called polymer fractionation. The molecular weight of polymers has a large influence