Tartaric acid in red wine as one of the key factors to induce   superconductivity in FeTe0.8S0.2
  The red wine dependence of superconductivity in FeTe0.8S0.2 was investigated. Samples with a higher shielding volume fraction had a tendency to show a higher concentration of tartaric acid in red wine. We found the tartaric acid is one of the key factors to induce superconductivity in FeTe0.8S0.2. 
Keita Deguchi, Tohru Okuda, Yasuna Kawasaki, Hiroshi Hara, Satoshi   Demura, Tohru Watanabe, Hiroyuki Okazaki, Toshinori Oza...
cond-mat.supr-con