References. 1  Top of page. 2  Abstract. 3  Circadian and homeostatic mechanisms in sleep. 4  The role of thalamus in sleep. 5  Intergeniculate leaflet and suprachiasmatic nuclei. 6  NREM and REM sleep. 7  Similarities between pineal melatonin production and spindle formation. 8  Spindles and melatonin in brain disorders. 9  DLMO and NREM sleep gate.
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Dri-Eaz HEPA 500 Negative Air Machine. The Dri-Eaz DefendAir HEPA 500 Negative Air Machine is a portable filtration system that draws air in from the surrounding environment and passes it through an advanced filtration system.The unit removes airborne particles like dust, mold spores, pollen, pet dander and miscellaneous debris.he Dri-Eaz DefendAir HEPA 500 Negative Air Machine is a portable filtration system that draws air in from the surrounding environment and passes it through an advanced filtration system.