The certified power conversion efficiency (PCE) of Organic-inorganic hybrid perovskite solar cells can exceed 25.5% currently. However, stability remains the dominating obstacle in practical applications as it’s easy to degrade when exposed in air. Scientists have been trying to make the device stable, better with self-healing properties that can resist hostile operation environments.
Neutron, as an electrically neutral particle, has a strong penetrability and always emits secondary gamma rays during the particle collision process. The scientific and efficient scheme of shielding neutron is to select high Z (atomic number), low Z materials, and neutron absorbing materials simultaneously for combined shielding. However, lead-containing materials are restricted in application with biological toxicity.
1,056 seconds, a new pulse length world record for high temperature tokamak plasma has been achieved on the "artificial sun" in Institute of Plasma Physics, Hefei Institutes of Physical Sciences (HFIPS), Chinese Academy of Sciences (ASIPP). On December 30th, the experimental advanced superconducting tokamak (EAST) set this milestone of tokamak operation for longer than 1,000 seconds by the end of 2021.
We can see and smell alcohol everywhere in medical environment as it is extensively used for skin disinfection. In some clinical examinations, it could be applied as conductive medium.
When hypertension (high blood pressure), is diagnosed, the structure and function of arteries usually have changed. Therefore, if people at high risk of hypertension could be identified at early stage, intervention measures such as active exercise, reasonable diet can be introduced to reduce the incidence of hypertension.