Optimal COVID-19 infection spread under low temperature, dry air, and low UV radiation

Performance of Air Foam Flooding under Low Frequency Vibration

Foam injection is widely applied in amounts of fields to drilling, production, and formation protection. Sometimes, the application result is disappointing, which is caused by the failure of bubble generation in foam flooding. Therefore, it is necessary to seek ways for improving the performance of foam injection. An increased disturbance to the stratum, like the vibration caused by a seismic o...

Nutrition and Infection with COVID-19

Low-temperature ionizing radiation resistance of Deinococcus radiodurans and Antarctic Dry Valley bacteria.

The high flux of cosmic rays onto the unshielded surface of Mars poses a significant hazard to the survival of martian microbial life. Here, we determined the survival responses of several bacterial strains to ionizing radiation exposure while frozen at a low temperature characteristic of the martian near-subsurface. Novel psychrotolerant bacterial strains were isolated from the Antarctic Dry V...

Effects of ultraviolet (UV) irradiation in air and under vacuum on low-k dielectrics

This work addresses the issue as to whether ultraviolet radiation of wavelengths longer than 200 nm can break Si-CH3 bonds in porous low-k dielectrics. To resolve this issue, porous SiCOH films (k = 2.3) were exposed to 4.9 eV (254 nm) ultraviolet (UV) radiation in both air and vacuum for 1 hour. Using Fourier Transform Infrared (FTIR) spectroscopy, the chemical structures of the dielectric fil...

Detection of low Intraperitoneal Air

Perforation of a hollow viscus is an acute abdominal drama and the accurate diagnosis highly depends on demonstration of free intra­pritoneal air. The importance of adequate examination in the demonstration of ,tiny amount ()ff air is stressed and the value of an upright chest film when the horizontal beam is tangential to the top of the diaphragm is mentioned. Before standing for chest x-ray t...