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Posts Tagged ‘saturday lecture series’

Saturday Lecture: Physiology/Tx of a Hangover

by coldwarrior ( 138 Comments › )
Filed under Academia, Open thread, saturday lecture series at January 1st, 2011 - 8:30 am

Don’t worry, this isn’t testable material. Oh, and Happy New Year!

Today we are going to look at the physiology of a  ‘hangover’ and possible treatments.

An alcohol hangover results from a constellation of adverse effects that alcohol and the metabolism of alcohol have on the body.

The misery begins when blood alcohol levels start to fall. Some experts to believe the hangover is a “kind of mini withdrawal,” says Robert Swift, professor of psychiatry and human behavior at Brown University and director of research at the Providence Veterans Adminstration Medical Center. Because alcohol is a sedative, your body reacts by releasing various neurochemicals to stimulate the brain. These chemicals cause a rapid pulse, nausea, tremors and light and sound sensitivity–the same symptoms that alcoholics experience when they stop drinking. The worst of the symptoms occur when blood alcohol levels reach zero, also known as “the morning after.”

How fast it takes you get to that zero level depends on your liver, which processes nearly all the alcohol you imbibe. And it can metabolize only small amounts of liquor each hour, explains liver specialist Dr. William Carey, professor of medicine at the Cleveland Clinic Lerner College of Medicine. But “every person is going to metabolize alcohol differently,” Carey says, with genetics and gender playing a role. On average, the liver metabolizes about one ounce of pure alcohol per hour. That’s about 12 ounces of beer, a five-ounce glass of wine or one and a half ounces of liquor.

Which leads to another theory that puts the blame for the hangover on pure physiology. Alcohol is first broken down in the liver into a toxic substance called acetaldehyde. Acetaldehyde is then further broken down into a harmless substance called acetate. At high doses, acetaldehyde causes nausea, vomiting, sweating and other symptoms akin to the hangover. Although there is no acetaldehyde in your system when you have a zero blood-alcohol level, some of the after-effects of the toxin may persist the morning after.

Congeners, by-products of the distillation and fermentation process, may also play a role in making holiday partiers miserable. Darker-colored liquors such as brandies, bourbon and red wine contain more congeners than lighter colored alcoholic beverages like gin or vodka. The big-bad of the various congeners is methanol, which is broken down by the body into formaldehyde. In the vernacular, formaldehyde is embalming fluid. When living people have this in their circulation, the clinical term for how they feel is “rotten,” Swift says.

Since alcohol is a diuretic, you’ll wake up dehydrated. That dehydration explains some of the symptoms such as headaches and a dry mouth. Alcohol also plays havoc with the body’s biorhythms, disturbing sleep patterns, despite it being a sedative. That lack of sleep contributes to the overall misery.

Meanwhile, the Aussies tell us this:

New Year’s revellers who need to cure a hangover should skip the conventional wisdom advising they swill coffee or another alcohol drink, and instead hit the gym.

The body gets rid of alcohol and its toxic by-products four ways: through breathing, via the liver or kidney and from sweating, said Aaron Michelfelder, a family physician from Loyola University Health System in Maywood, Illinois. Exercise speeds breathing, increases sweat, and moves alcohol-laden blood to the liver and kidneys more quickly.

“That’s why you should stay hydrated as well,” Michelfelder said in a telephone interview. “It takes a lot of water to process alcohol in your body.” 

Drinking plenty of water, especially between every glass of wine, whiskey or beer, has another benefit – it can reduce the overall amount of alcohol consumed, he said.

Michelfelder has a list of recommendations partygoers should heed as they hit the town on New Year’s that can help the body grapple with the tsunami of alcohol ahead. The first is, avoid a hangover altogether, he said.

“A hangover is brain damage,” he said. “Some of it is going to heal, and some will be permanent. Prevention is the best medicine, particularly with hangovers.”

The most important is to drink moderately and slowly, at most five drinks for men and three for women over a three-hour period. Other measures include taking an anti-inflammatory pill such as ibuprofen (CW notes: Tylenol (acetaminophen) IS NOT an anti-inflammatory. aspirin and ibuprofen are) and eating before any drinking occurs. The medicine may help avoid nerve damage from the alcohol, while the food may slow the absorption of alcohol. B vitamins may also help, he said.

Michelfelder’s most surprising advice involves what to do after the hangover has set in. Coffee is unlikely to ease the nausea, dizziness, cotton candy head and general malaise that stems from over-imbibing, though it may lift some symptoms of depression that can set in after the warm and pleasant effects of the alcohol wear off, he said.

“Hair of the dog,” the familiar standby of getting down just one more drink in order to stymie the ill-effects of a hangover, is particularly unhelpful, Michelfelder said. It will only make you feel worse, he said.

I thought this an appropriate way to start the new year as last night was amateur night and there will probably be more than the average number of hangovers out there. Anyone have their own very sure fire hangover cure…and please dispense with the ‘dont drink booze’ treatment as that is just plain crazy talk.

Saturday Lecture Series: Christmas Break

by coldwarrior ( 49 Comments › )
Filed under Academia, Open thread, saturday lecture series at December 25th, 2010 - 8:30 am

There are no lectures today as it is Christmas Day.

Merry Christmas, everyone!

Saturday Lecture Series: The Dark Ages

by coldwarrior ( 39 Comments › )
Filed under Academia, History, Open thread, saturday lecture series at December 11th, 2010 - 8:30 am

Today we return to Prof Eugen Weber’s course, ‘The Western Tradition’.  Today he discusses: The Dark Ages .

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Please follow this link out to 17 The Dark Ages

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The Barbarian kingdoms took possession of the fragments of the Roman Empire. As the Barbarians became Christianized, the Christian Church is influenced by them, the legends of ‘supernatural power’ of the saints is on the rise as patron while the leaders of the church become violent and unjust at times, and conversion is done by a new power that impressed and subdued the barbarians.

The ruling classes are gradually changed and succession to power is stabilized by the church’s decrees. The church offers an escape from the ‘doomed world’ to those that are baptized and follow.  Monasteries and Convents start as a refuge, and mature during this period.  They then spread the word, educate, convert, and transcribe, and write. The Monasteries are an interesting counterpoint to society in general.

Saturday Lecture Series: Arsenic as a Building Block for Life?

by coldwarrior ( 176 Comments › )
Filed under Academia, Open thread, saturday lecture series, Science at December 4th, 2010 - 8:30 am

NASA astrobiologist went out to the hyper saline Lake Mono California (eastern edge of Yosemite National Park) looking for extremeophiles, microorganisms that thrive in places that would be lethal to most other organisms. This enables the astrobiologists to better understand how life can arise elsewhere in our solar system and beyond. Well, they found one, GFAJ-1 strain of Gammaproteobacteria uses toxic arsenic as a key building block of its DNA, causing astrobiologists to re-think the possibilities for life on and off our planet:

From the NASA website:

NASA-supported researchers have discovered the first known microorganism on Earth able to thrive and reproduce using the toxic chemical arsenic. The microorganism, which lives in California’s Mono Lake, substitutes arsenic for phosphorus in the backbone of its DNA and other cellular components.

New Life Form Discovered in Mono Lake

A microscopic image of GFAJ-1 grown on arsenic. [larger image]

“The definition of life has just expanded,” said Ed Weiler, NASA’s associate administrator for the Science Mission Directorate at the agency’s Headquarters in Washington. “As we pursue our efforts to seek signs of life in the solar system, we have to think more broadly, more diversely and consider life as we do not know it.”

This finding of an alternative biochemistry makeup will alter biology textbooks and expand the scope of the search for life beyond Earth.

Carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur are the six basic building blocks of all known forms of life on Earth. Phosphorus is part of the chemical backbone of DNA and RNA, the structures that carry genetic instructions for life, and is considered an essential element for all living cells.

Phosphorus is a central component of the energy-carrying molecule in all cells (adenosine triphosphate) and also the phospholipids that form all cell membranes. Arsenic, which is chemically similar to phosphorus, is poisonous for most life on Earth. Arsenic disrupts metabolic pathways because chemically it behaves similarly to phosphate.

Please read the rest here

Here are some photo’s of Mono Lake

Arsenic as a replacement for phosphorous in ATP, DNA,  and phospholipids…amazing how life will adapt…what fits, survives.