Disadvantages of In-Office Whitening. 1  In-office bleaching is more expensive than take-home alternatives. 2  Its cost, on average, is $650, compared to $400 for take-home trays and under $100 for over-the-counter bleaching trays or whitening strips.
Planetary protection is a guiding principle in the design of an interplanetary mission, aiming to prevent biological contamination of both the target celestial body and the Earth in the case of sample-return missions.
Passive freeze protection. what we protect. Ocean Freight Astro-CoolerÂ® container liners and thermal pallet covers protect during shipping, and provide extra insurance if your shipment gets hung up in customs and is subject to intense heat or cold for several days.