The president's announcement capped weeks of intensive negotiations between federal officials, carmakers, environmental groups and California regulators, who agreed to follow the new federal guidelines rather than impose their own, more stringent clean-air standards on new vehicles.
Although standard clean-in-place (CIP) procedures can help restore columns towards their original state, fouling by certain types of material is often irreversible under typical conditions (Jin et al., 16), and this must be balanced by the fact that more stringent cleaning can cause degeneration of the resin pore structure and ligand (Jiang et al., 14; Muller-Spath et al., 23).
"Laws have become more stringent about clean water, endangered species.
The same vehicle can get more than one grade depending on which of several certification standards is used -- California guidelines, federal standards, or more stringent federal clean-vehicle standards for certain regions with more pollution -- and low-sulfur gasoline in California reduces emissions.
Add to it the clean-up costs, more stringent safety regulations and an inevitable increase in insurance arrangements, and the economics of nuclear will be forever changed.
But to make that happen the hot spot would have to be restored to a "clean" standard, which is more stringent than the industrial standard that the rest of the property must meet to be used for manufacturing.
Wet Ones, antibacterial wipes or baby wipes get lots of votes, as do waterless hand sanitizers like the one from Purell; the more stringent carry Lysol or Clorox wipes to clean out sinks and showers in hotel rooms.
The survival of B. pumilus SAFR-032 spores to standard clean room sterilization practices requires development of more stringent disinfection agents.
Under the new bankruptcy laws, which took effect on Oct. 17, companies have to meet more stringent requirements before having the luxury of wiping their debts clean.
With the environmental regulations becoming more stringent and people's environmental awareness getting stronger, the demand for clean production of gasoline, diesel and lubricants and other products from crude oil is increasing.
