After serious injury, the leading cause of death is blood loss. But a new study shows that if a person needs massive transfusions, the fresher the blood, the better. The study in the Annals of Emergency Medicine finds that people receiving large transfusions of packed blood more than about three weeks old have about a five percent higher death risk… and the more blood transfused, the higher the risk. Experts say more blood and plasma donors are needed to overcome shortages… and shelf life limits.
If you didn’t sleep well last night, you’re more likely to be angry today. That sounds intuitive, but a study in the Journal of Experimental Psychology proves it– losing just a couple hours of sleep makes you much more likely to react with anger to a frustrating situation. Researchers used annoying noises in the lab to measure anger responses… and found that anger was substantially higher in people who were sleep-deprived. The next step is to see if sleep loss makes people act more aggressively toward others.
And finally… people who grow up in an abusive home are more likely to repeat the behavior themselves. But a new study shows that it’s the opposite in the workplace. The study in the Journal of Applied Psychology shows that people who’ve been abused and mistreated by their bosses are much more likely to become good bosses themselves. Apparently, abused employees learn what not to do when they’re running things.
Donated blood saves 4.5 million American lives each year, but has a short shelf life, low portability and must be available for all blood types. Researchers have sought safe and effective blood substitutes for 60 years, and a few viable alternatives are in animal testing.
Blood Substitutes: DNA mutations happen all the time in the body, but the immune system usually detects and deals with them. When the system fails, cancer results. Yet some animals, such as elephants, almost never get cancer, and scientists have learned that the elephant DNA repair system is 20 times more powerful than the human system. Experts explain how they hope to tap this knowledge.
E-cigarettes and Oral Health: Experts have a lot of questions still unanswered about electronic cigarettes, but evidence is starting to accumulate that the effect on the oral cavity can be as significant as tobacco cigarettes. An expert discusses.