Cells are active components in their environment and constantly adjusting their performance to improve extracellular milieu changing. This approach is reflected their tends of maintaining intracellular homeostasis. When the cells encounter stress or pathologic stimuli, they can undergo a new manner (adaptation) and new steady state for achieving viability and function. If the external stress is...

Perovskite solar cells have shown unprecedent performance increase up to 22% efficiency. However, their photovoltaic performance has shown fast deterioration under light illumination in the presence of humid air even with encapulation. The stability of perovskite materials has been unsolved and its mechanism has been elusive. Here we uncover a mechanism for irreversible degradation of perovskit...

The electrochemical behaviour of indole and a group of indole-containing compounds with a substituent at the C3 position, indol-3-acetamide (IAM), tryptamine, gramine, indole acetic acid (IAA), indole propionic acid (IPA), indole butyric acid (IBA) and tryptophan, was investigated at a glassy carbon electrode, in order to determine their oxidation pathways. Indole undergoes one irreversible pH ...

The Geometry of Interaction semantics introduced by Girard provides a new way of understanding the reduction process in the-calculus where the computation steps are linear and reversible. Moreover, this can be trivially implemented to give a simple compilation technique: the Geometry of Interaction Machine. At the cost of introducing global operations (irreversible copying and discarding) Danos...

introduction : teeth with irreversible pulpitis usually undergo root canal therapy (rct). this treatment modality is often considered disadvantageous as it removes vital pulp tissue and weakens the tooth structure. a relatively new concept has risen which suggests vital pulp therapy (vpt) for irreversible pulpitis. vpt with calcium enriched mixture (vpt/cem) has demonstrated favorable treatment...

The thermal denaturation of ribonuclease A has been studied by differential scanning calorimetry in the presence of 4-chlorobutan-1-ol. The thermal transitions were observed to be reversible at pH 5.5 in the presence of low concentration (up to 50 mM) of the alcohol, irreversible in the intermediate (50 mM < c < mM) and again reversible in the presence of 250 mM and higher concentrations of 4-c...