Posts tagged ‘head’

We Don’t Lose Most of Our Heat Through Our Heads

By Chad Upton | Editor

Winter hat, stocking cap, beanie or toque; whatever you call it, it keeps your head warm. But, it doesn’t necessarily keep you warm.

An old US Army survival manual suggested wearing a hat since “40 to 45 percent of body heat” is lost through your head. This recommendation is thought to have come from a military experiment over 60 years ago when participants were dressed from neck to toe in Arctic clothing, but no headwear. Over time, this has snowballed into “most” heat is lost through our heads. (more…)

November 27, 2012 at 2:00 am 1 comment

Redheads Require More Anesthesia

By Kaye Nemec

It seems ridiculous to say out loud, but the fact of the matter is that studies have proven that redheads actually require more anesthesia than blondes, brunettes etc. In 2004 a study was published in Anesthesiology that found that up to 20% more anesthetic was needed to achieve the same result in redheads that had been achieved in the blondes and brunettes taking part in the study.

So how does this make any sense? Without getting all scientific (those details can be found here) the bottom line is that redheads have specific mutations on the MCR1 gene that not only increase expression of red pigment but may also be involved with the function of the central nervous system.

This study opened the door for scientists to learn more and more about anesthesia and how it affects different patients. Do you know people who swear Tylenol or Ibuprofen doesn’t do anything for them? How about people who swear they have to take more than the recommended dosage in order for the medicine to take effect? Perhaps there is some truth to their claims after all. This study is a breakthrough in what could be a detailed explanation of how different people are affected by different medications.

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Sources: OR.orgMedscape, Discovery Health

Photo: Johnnyalive

May 20, 2011 at 2:00 am 47 comments

How to Increase Shower Water Pressure

There is nothing worse than a low pressure shower. Actually, 1000AwesomeThings said it best, “Not much affects your day every day as much as a good shower.”

In a lot of cases, there is something you can do about it. For example, if a nearby faucet has good pressure then you can probably improve your shower pressure in about 5 minutes.

Modern shower heads contain a flow restriction plate to decrease the amount of water you consume, which saves you money and ensures the city can produce enough clean water for everyone. It’s basically a rubber or Teflon disc that has a small hole in it. The smaller the hole, the less water can travel through it and onto your head. If you want to know what that restrictor looks like, click here to see a 10 pack of them on amazon (great if you own a lot of showers and have a problem with too much pressure).

Sometimes, these flow restrictor get clogged with debris, which reduces the flow further. Other times, they’re too small for your home’s water pressure. In either case, you can remove the restrictor, clean it and put it back in. If it’s not dirty then it may be too restrictive for your water pressure. If that’s the case, you can leave it out entirely or drill the hole so it is slightly larger. (more…)

April 6, 2010 at 11:31 pm 7 comments

Why do Some Cars Have Blue Headlights?

Traditionally, cars have had yellowish headlights. Now, many cars have light blue colored headlights. Some cars come with those headlights from the factory and other times, owners will install similar systems or similar looking systems.

The factory blue headlights are known as HID (high intensity discharge) headlights. Just like the name describes, they’re brighter than normal halogen headlights.

Traditional lights heat a small metal filament to produce light while HID lights create a plasma discharge arc between two tungsten electrodes. It is this plasma discharge that creates the blue color. But, this technology is not new, it’s very similar to the bright lights that illuminate stadiums and roadways.

The brightness is the main advantage of these lights. Like rear fog lights, these headlights were popularized in Europe where fog, rain and curvy roads create demanding driving conditions. Because HID lights are brighter, they penetrate fog, rain and snow better than halogen lights — an advantage when the conditions are not ideal.

HID headlights are also more energy efficient than halogens, which isn’t a major concern in vehicles right now, but as we move to battery powered cars that will become very important — the less power accessories consume, the further the vehicle can drive on a single charge. (more…)

April 2, 2010 at 12:46 am 12 comments


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