PROTECTION AGAINST FROST

Mars: The Case Against Permanent CO. Frost Caps

Leighton and Murray have argued that there is a polar reservoir of solid CO: on Mars that lasts throughout the year and whose vapor pressure determines the mean partial pressure of CO: in the atmosphere. This model is discussed in the light of recent data, and several difficulties emerge. First, such a system might be unstable, owing to the tendency of poleward heat transport o increase with at...

Protection against overflow attacks

vii CHAPTER

Respiratory protection against influenza.

Protection against Oxidative Stress

Carotenoid Protection against Oxidation

Based on experimental observations made in photosynthetic organ— isms which lacked colored carotenoid pigments, a hypothesis was developed that these pigments could serve as protective agents against photosensi— tized oxidations. Over the last 20 years, many workers have confirmed this hypothesis and have extended the observations to non—photosynthetic bacteria, plants and animals. It has also ...