We have examined the superfluidity of 3He in 98.2% porous silica aerogel with up to 34% 4He at 21.6 bars. The mixture is phase separated for 4He fractions between ,11% and 34%, and the 4Herich phase preferentially occupies the regions of highest silica density in the aerogel, thus modifying the distribution of the correlated disorder seen by superfluid 3He. The 3He Tc increases slightly with 4H...

Forty years ago, a Japanese press release issued on the occasion of a visit by Arthur Kornberg called him the “father of life in a test tube.” This was in reference to his laboratory’s 1967 feat of copying single-stranded circular DNA into a replicative form and then back to an infectious viral DNA strand using purified DNA polymerase and DNA ligase (Figure 1, left panel). Although a somewhat e...

Midbrain dopaminergic (mDA) neuron development has been an intense area of research during recent years. This is due in part to a growing interest in regenerative medicine and the hope that treatment for diseases affecting mDA neurons, such as Parkinson’s disease (PD), might be facilitated by a better understanding of how these neurons are specified, differentiated and maintained in vivo. This ...

Interactivity is one of the key conceptual apparatuses through which video games have been theorized thus far. As many writers have noted, video games are distinct from other forms of media because player actions seem to have direct, immediate consequences in the world depicted onscreen. But in many ways, this “interactive” feature of video games tends to manifest itself as a relentless series ...