Author Archives: curiouscat

Smokers with High Blood Pressure and High Cholesterol Lose 10 Years

By examining data from the Whitehall Study researchers have found smokers with high blood pressure and high cholesterol in middle age died 10 years earlier than the others after reaching age 50. This is independent of changes after later in life (quiting smoking, etc.). Life expectancy in relation to cardiovascular risk factors: 38 year follow-up of 19,000 men in the Whitehall study

At entry, 42% of the men were current smokers, 39% had high blood pressure, and 51% had high cholesterol. At the re-examination, about two thirds of the previously “current” smokers had quit smoking shortly after entry and the mean differences in levels of those with high and low levels of blood pressure and cholesterol were attenuated by two thirds. Compared with men without any baseline risk factors, the presence of all three risk factors at entry was associated with a 10 year shorter life expectancy from age 50 (23.7 v 33.3 years). Compared with men in the lowest 5% of a risk score based on smoking, diabetes, employment grade, and continuous levels of blood pressure, cholesterol concentration, and body mass index (BMI), men in the highest 5% had a 15 year shorter life expectancy from age 50 (20.2 v 35.4 years).

Conclusion Despite substantial changes in these risk factors over time, baseline differences in risk factors were associated with 10 to 15 year shorter life expectancy from age 50.

Another conclusion: if you don’t want to live a shorter life, don’t smoke. Not a new idea but given how many people continue to smoke it seems some don’t understand this conclusion.

3D Printing is Here

photo of objects printed using a 3D printer

Photo by Jessica Sabo at the at 2009 Annual ASEE Conference.

The Future of Printing is 3D [I removed the broken link]

At this year’s annual ASEE Conference in Austin, one of the main topics of conversation started with the question, “have you seen the 3D printer?”. The company Stratasys, Inc. has created their Dimension 3D Printers. Their latest innovation is their line of uPrint machines, which are less costly (prices starting at $14,900)
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Jesse Roitenberg, the representative from Stratasys at the conference, explained the benefits of using 3D printing as opposed to building models by hand:

“With a 3D printer, you are actually able to create an object as you had designed it. Once the object is created, the designer is then able to hold, test and verify the design. The object created is more accurate and the process is less time consuming.”
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The Dimension 3D printers have been used in both educational facilities and the workplace, benefiting everyone from engineers to middle school science teachers. Below is a video of Jay Leno explaining how he was able to use the 3D printer to recreate an old steam engine car part.

Norman E. Borlaug 1914-2009

The Father Of the Green Revolution

Norman E. Borlaug, 95, an American plant pathologist who won the Nobel Peace Prize in 1970 for starting the “Green Revolution” that dramatically increased food production in developing nations and saved countless people from starvation, died Saturday at his home in Dallas.

“More than any other single person of this age, he has helped provide bread for a hungry world,” the Nobel committee said in honoring him. “Dr. Borlaug has introduced a dynamic factor into our assessment of the future and its potential.”
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In his lecture accepting the Nobel Prize, he said an adequate supply of food is “the first component of social justice. . . . Otherwise there will be no peace.”
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In 1977, Dr. Borlaug received the Medal of Freedom, the highest civilian honor of the U.S. government.

Billions Served: Norman Borlaug interviewed by Ronald Bailey

As a matter of fact, Mother Nature has crossed species barriers, and sometimes nature crosses barriers between genera–that is, between unrelated groups of species. Take the case of wheat. It is the result of a natural cross made by Mother Nature long before there was scientific man. Today’s modern red wheat variety is made up of three groups of seven chromosomes, and each of those three groups of seven chromosomes came from a different wild grass. First, Mother Nature crossed two of the grasses, and this cross became the durum wheats, which were the commercial grains of the first civilizations spanning from Sumeria until well into the Roman period. Then Mother Nature crossed that 14-chromosome durum wheat with another wild wheat grass to create what was essentially modern wheat at the time of the Roman Empire.

Durum wheat was OK for making flat Arab bread, but it didn’t have elastic gluten. The thing that makes modern wheat different from all of the other cereals is that it has two proteins that give it the doughy quality when it’s mixed with water. Durum wheats don’t have gluten, and that’s why we use them to make spaghetti today. The second cross of durum wheat with the other wild wheat produced a wheat whose dough could be fermented with yeast to produce a big loaf. So modern bread wheat is the result of crossing three species barriers, a kind of natural genetic engineering.
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I see no difference between the varieties carrying a BT gene or a herbicide resistance gene, or other genes that will come to be incorporated, and the varieties created by conventional plant breeding. I think the activists have blown the health risks of biotech all out of proportion.
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the data that’s put out by the World Health Organization and [the U.N.’s Food and Agriculture Organization], there are probably 800 million people who are undernourished in the world. So there’s still a lot of work to do.

I am a bit more cautious about supporting genetic engineering in our food supply but I agree with him that we need to remain focused on the lives of hundreds of millions of hungry people (which is far too often ignored). I am worried about the risks to the environment and human health. I am also worried about the concentration of food plants in a greatly reduced genetic varieties that are more productive in general but increase the risks of massive food failures (due to limited genetic varieties).

40 New Species Found in Papua New Guinea

The rat is not afraid of humans, which could make it vulnerable. Photo by the BBC.

Yet another discovery of dozens of new species has been made. The rat that’s the size of a cat: 40 new species in ‘lost world’ at a remote volcano in Papua New Guinea.

In the kilometre-deep crater of Mount Bosavi, they found a habitat teeming with life which has evolved in isolation since the volcano last erupted 200,000 years ago.

Among the new species was the the Bosavi Woolly Rat. One of the biggest rats in the world, it measures just over 32 inches from nose to tail and weighs 3lb. The silvery grey mammal has dense fur and its teeth suggest it has a largely vegetarian diet and probably builds nests in tree hollows or underground.
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It is estimated that along with the giant rat and cuscus the expedition found about 16 species of frogs, one species of gecko, at least three species of fish, at least 20 of insects and spiders and possibly one new species of bat.
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Further evidence of the rich wildlife of the tropical location came with the discovery of the Bosavi Silky Cuscus. This animal, which resembles a small bear, is a marsupial that lives up in trees, feeding on fruits and leaves.

Weighing in at some 4.5lb, it has thick silky fur adapted for the mountain environment in which it lives. Dr Helgen has identified it as a new subspecies in the group of strange marsupials known as cuscuses.
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The habitat in the area is currently regarded as pristine, but less than 20 miles to the south of Mount Bosavi extensive logging operations are happening.

How to Stay Healthy: Avoiding the Flu

It is no secret that washing your hands is a great strategy to stay healthy. Still few people take care to wash their hands thoroughly frequently during each day. The H1N1 Flu is just the latest sickness that washing your hands protects you from.

The CDC recommends you take these everyday steps to protect your health to protect yourself from the flu:

Wash your hands often with soap and water, especially after you cough or sneeze. Alcohol-based hand cleaners are also effective. Though the scientific evidence is not as extensive as that on hand washing and alcohol-based sanitizers, other hand sanitizers that do not contain alcohol may be useful for killing flu germs on hands.
Avoid touching your eyes, nose or mouth. Germs spread this way.
Try to avoid close contact with sick people.

And to keep others healthy you should

Cover your nose and mouth with a tissue when you cough or sneeze. Throw the tissue in the trash after you use it. [others also suggest coughing into you elbow instead of your hands, again to reduce the spread of germs.]
If you are sick with flu-like illness, CDC recommends that you stay home for at least 24 hours after your fever is gone except to get medical care or for other necessities. (Your fever should be gone without the use of a fever-reducing medicine.) Keep away from others as much as possible to keep from making others sick.

The spread of this 2009 H1N1 flu is thought to be happening in the same way that seasonal flu spreads. Flu viruses are spread mainly from person to person through coughing or sneezing of people with influenza. Sometimes people may become infected by touching something with flu viruses on it and then touching their mouth or nose.

The incidence of H1N1flu is likely to be high this flu season based on results in the Southern Hemishpere. Symptoms are those of the flu: fever, cough, sore throat, runny or stuffy nose, body aches, headache, chills and fatigue; can include diarrhea and vomiting.

The CDC includes weekly flu statistics on their web site. Since mid-April to August 30, 2009, a total of 9,079 hospitalizations and 593 deaths associated with 2009 influenza A (H1N1) viruses have been reported to CDC an increase from 8,843 hospitalizations and 556 deaths from the prior week.

Engineer Tried to Save His Sister and Invented a Breakthrough Medical Device

Here is another remarkable example of the great benefit engineers provide society.

How a software engineer tried to save his sister and invented a breakthrough medical device

I wanted to help my sister as much as I could. I went to Medline, where there are hundreds of thousands of documents describing clinical studies, to see what I could find.

There are billions of dollars spent every year on clinical studies. I was surprised to discover that there were sometimes clinical studies of treatments for which there were no clinical applications. The trials would show successful results but no clinical applications.

I found a 1987 Italian funded set of clinical studies that showed successful treatment of tumors by the application of chemotherapy directly into the tumors. But I could find nothing since then.
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It took us two years to do the engineering. And it has taken the FDA seven years and two months to approve the product for sale. We were able to shorten the FDA process a little by saying that it was similar to other devices that had already been approved.

Great stuff.

Scientific Illiteracy Leaves Many at Risk in Making Health Care Judgements

Scientific literacy is important for many reasons and that importance has increased greatly over the last century. Medical research is often difficult to interpret. Often various studies seem to contradict each other. Often the conclusions that are drawn are far too broad (especially as the research conclusions are passed on and people hear of them overly simplified ways).

Many health care options are not obviously all good, or all bad, but instead a mix of benefits and risks, both of which include interactions with the individuals makeup. So we often see contradictory (and seemingly contradictory) advice. Without a level of scientific literacy it is very difficult for people to know how to react to medical advice.

We have numerous posts on the scientific inquiry process showing that acquiring scientific knowledge is complex and can be quite confusing in many instances. While understanding things are often less clear cut than they are presented it is still true that most often strategies for healthy living have far better practices that will provide far better results than alternatives.

The scientific illiteracy that has some think because their are risks no matter what is done that means there is no evidence some alternatives are far superior is very dangerous. As you can see in action now with those that risk their and others lives and health by doing things like not vaccinating their children, or driving when drunk, or driving when talking on a cell phone.

Without a scientifically literate society even completely obvious measures like not using antibiotics on viral infections are ignored.

Appropriate Technology: Solar Water in Poor Cairo Neighborhoods

Cairo Slums Get Energy Makeover

Since 2003 the nonprofit Solar CITIES project has installed 34 solar-powered hot water systems and 5 biogas reactors in Cairo’s poor Coptic Christian and Islamic neighborhoods.
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Solar CITIES’ hot water systems are constructed from recycled materials and are uniquely tailored to the parts of a city where water and electricity availability are often sporadic. “The problem with professional solar hot water systems is that they’re made for cities with continuous water,” Culhane said. By contrast, Solar CITIES’s water heaters use a city’s water when it’s available but draw from a backup storage tank when it’s not.

The setup consists of an insulated rectangular box covered in clear glass or plastic on one side. Inside the box are copper tubes wrapped in sheets of aluminum, which are painted black. Sunlight striking the darkened aluminum is converted to heat, which is then used to warm water flowing through the pipes. The glass sheet on top of the box prevents the heat from being carried away by wind.
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Solar CITIES also installs biogas reactors, which are based on designs Culhane saw while working in India. The reactors use microbes harvested from animal guts to break down food wastes into flammable gas that can be used for cooking and heating. If necessary, the reactors can draw hot water from the solar water heaters to maintain the warm temperatures the bacteria need to survive.

By attaching a simple plastic tube to the reactors, gas can be piped down several stories for residents to use. “In 24 hours, you’ve got 2 hours of cooking gas from yesterday’s cooking garbage,” Culhane said. The biogas reactors provide a more reliable supply of cooking gas than most residents currently have.

Awesome, I love to see people using engineering to make life better for those that can truly use help.

Researchers Work to Protect Bats Against Deadly Disease

Researchers work to protect Wisconsin bats against deadly disease

Redell, who studies bats for the Department of Natural Resources, lives every day now with the threat of a disease called white-nose syndrome hanging over his head. The disease, though not yet in Wisconsin, has killed more than 90 percent of the cave bats in Eastern states such as New York and Vermont. Experts predict it could make its way to Wisconsin, with its eight species and hundreds of thousands of bats, in as little as two years.
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One female little brown bat – with a body less than the length of your thumb – can eat its body weight in insects in one evening, Redell said. Such is the insect-hunting prowess of the bats that they are thought to save farmers billions of dollars in crop losses, according to Sheryl L. Ducummon, with Bat Conservation International.

In a recent scientific article on the ecological and economic importance of bats, Ducummon reported that, in one summer, the 150 bats in an average colony of big brown bats can conservatively eat 38,000 cucumber beetles, which attack corn and other farm crops. Damage from the beetle and their larvae cost corn farmers as much as $1 billion a year.

The loss of such an insect-eating force could be devastating, Redell said. The approximate 1 million bats that have already died of white-nose syndrome in the last three years on the East Coast would have eaten 700,000 tons of insects were they still hunting the night skies, he said.

Bats perform other important tasks, too. Several Western species serve crucial roles as pollinators for desert plants such as agave and as seed dispersers for dozens of species of cacti.
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“I mean, this is like a mouse that flies, but it has the predatory capabilities of a polar bear,” Blehert said. “They are physically adapted to command the night sky. You’re talking about a little thing with a body less than half the size of your thumb whose heartbeat can get up to 1,000 beats a minute when they are flying but that can slow when they are hibernating in the winter to 4 beats a minute. And they live 20 to 25 years!”

Bats really are amazing and very valuable animals.

Friday Fun: Bristol Zoo’s Human Exhibit

Photo of the Homo Sapiens zoo sign at the Bristol Zoo

A mysterious sign has appeared on the side of the Zoo’s popular Coral CafÃ©, designating the area as a place to spot one of the world’s most widespread species – Homo sapiens. The notice, which appeared without warning this week, shows humans ‘on display’ inside the cafÃ© and includes tongue-in-cheek description of the species and its characteristics.

Zoo staff were surprised and amused to discover the new fixture. Dr Jo Gipps, Director of Bristol Zoo Gardens, said: “This is definitely not one of the Zoo’s own signs, it is clearly a prank and a very good one too. It looks completely genuine. We think it’s great sign and we have absolutely no intention of removing it, however I think one of them is probably enough.”

From the sign:

After a gestation period of nine months, the you usually live in the parents’ next for around 16 years. While the parents are out foraging for food, juveniles are looked after in large groups by other adults.

In adolescence, the offspring adopt a more nocturnal lifestyle and engage in ritualized activities of drinking fermented liquids and dancing to rhythmical sounds, which scientists believe may help them to find a mate.
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They are known to adopt other species as pets, particularly dogs (canis lupus familians) and cats (felis catus).

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