Low-field MR spectra and images were acquired using a 47.5 mT MR scanner (89 mm i.d. bore) equipped with Prospa software (version 3.12, Magritek, Wellington, New Zealand).
For MRI, a Bruker vertical 4.7-T scanner with a 60-cm-id bore equipped with an AC-44 actively shielded gradient set of the maximum strength 40 mT/m, and a 19.5-cm-id linear birdcage radiofrequency coil was used.
All experiments were conducted on a 4.7 T Bruker horizontal bore magnet equipped with a Varian Inova spectrometer and VNMR version 6.1.
Briefly, mouse MRI measurements were performed using a 4.7 T Bruker Avance horizontal bore system equipped with a 200 mm inner diameter gradient set capable of 30 G/cm gradient strength or a 7T Bruker Pharmascan system.
All MR imaging was acquired at a 1.5 T MRI scanner (MAGNETOM Aera, Siemens AG, Germany) with a 70 cm bore magnet equipped with XI gradients (33 mT/m @ 125 T/m/s) and XQ gradients (45 mT/m @ 200 T/m/s).
Mouse brain MRI was performed on seven infected mice (week 8 p.i). and nine control mice using a 9.4 T small bore animal scanner, equipped with a BGA12S gradient system capable of 675 mT/m (BioSpec 94/20, Bruker, Germany).
The bears are equipped with 12 joints, multiple touch sensors, microphones, speakers, and accelerometers.
The bear is equipped with sensors for light, touch, alcohol and accelaration.
All MRI experiments were performed on a 7 T (310 mm bore size) superconducting magnet equipped with actively shielded imaging gradients (400 mT/m maximum gradient strength, 120 mm inner bore size) (Agilent Technologies, Palo Alto, CA).
All the reintroduced bears will be equipped with radio collars so that wildlife biologists can monitor their health and movements, Dr. Servheen said.
The polar bear comes specially equipped with a double layer of fur, undergirded by four inches of blubber, that almost completely prevents heat loss; broad, fluffy paws that act as snowshoes, and short, solid claws that grip the ice; an elongated snout for poking into ice holes and pulling out seals; and the ability of that snout to smell prey from a distance of 20 miles.
