Tuning the Reversibility of Oxygen Redox in Lithium-Rich Layered Oxides

Recently, more and more new high-capacity lithium-rich layered oxides involving both metal and oxygen redox have been proposed. However, the structural stability was influenced by the irreversible oxygen redox, which leads to the instability of the oxygen framework. Here, we propose that the reversibility of the oxygen redox in Li₂RuO₃ can be controlled by tuning its electronic structure via incorporating boron atoms into the interstitial sites of the Li₂RuO₃ layered structure and obtain higher-stability lithium-rich layered oxides. Using <i>in situ</i> X-ray diffraction and X-ray absorption fine structure, we conclude that oxygen redox was tuned to a reversible level without reduction of Ru as reported previously. The intrinsic mechanism of the modification was further determined by density functional theory calculations. This work will provide a new scope for the strategy of balancing the high capacity and good structural stability of lithium-rich layered oxides

Subclinical Anterior Horn Cell Involvement In Juvenile Myoclonic Epilepsy

WOS: A1994NH70100011PubMed ID: 8156952Although clinical signs of muscle wasting and weakness were not present, electromyographic (EMG) evidence of subclinical anterior horn cell involvement of spinal cord was noted in 5 patients with juvenile myoclonic epilepsy (JME). Quantitative interference pattern analysis of EMG recorded from the anterior tibial muscle showed that the ratio (amplitude:turn/turn:second, A:T/T:S) was significantly increased in 10 patients with JME and 12 patients with lower motor neuron disorders (LMND) as compared with those of 22 normal subjects and 15 patients with frequent generalized tonic-clonic seizures (GTC). Subclinical anterior horn cell involvement detected by EMG techniques can be related to a genetically determined component of JME

Importance of Yeasts and Lactic Acid Bacteria in Food Processing

WOS: 000357717400015