Author Archives: curiouscat

Is Dirt Healthier Than Broccoli?

That dirt I ate as a kid is maybe why I have been relatively healthy. Ok, probably that hasn’t been the most important factor. But it may be that some dirt and germs (kids licking their dirty hands and the ice cream melts on it, etc.) is actually more important for their long term health than finishing off the broccoli (of course, a healthy diet requires eating a bunch of vegetables, more than most kids eat).

The hygiene hypothesis has become a popular explanation for the boom in asthma, allergies and other health problems. Boiled down to one sentence the hypothesis is that exposure to germs early in life creates a healthy immune system and too little exposure results in a hypersensitive immune system (that is not as effective and leads to things like allergies).

A recent closed science paper, Microbial Exposure During Early Life Has Persistent Effects on Natural Killer T Cell Function, found mice exposed to more germs early on where healthier:

Exposure to microbes during early childhood is associated with protection from immune-mediated diseases such as inflammatory bowel disease (IBD) and asthma. Here, we show that, in germ-free (GF) mice, invariant natural killer T (iNKT) cells accumulate in the colonic lamina propria and lung, resulting in increased morbidity in models of IBD and allergic asthma compared to specific pathogen-free (SPF) mice. This was associated with increased intestinal and pulmonary expression of the chemokine ligand CXCL16, which was associated with increased mucosal iNKT cells. Colonization of neonatal—but not adult—GF mice with a conventional microbiota protected the animals from mucosal iNKT accumulation and related pathology. These results indicate that age-sensitive contact with commensal microbes is critical for establishing mucosal iNKT cell tolerance to later environmental exposures.

The microscopic battles waged in our bodies every day and over our lifetimes are amazing.

Lean Science: Using Cheap Robots to Aid Research

Fun video showing how scientists use Lego Mindstorm robots to aid research into creating artificial bones. Lego Mindstorm robots are useful at a very reasonable price.

The webcast also includes this practical quote from Michelle Oyen, lecturer in the Department of Engineering at Cambridge University: “without your bones you would be a pile of goo lying on the floor.”

The thinking discussed in the webcast echos the lean manufacturing principles discussed in the Curious Cat Management Improvement Blog: finding good solutions to aid people in doing their jobs. The type of custom solutions they discuss here are great.

This type of use of technology is great. One of the problems we often see with technology solutions though is when they are imposed on the workplace in a way that doesn’t aid people. There is a big difference between what Toyota does (using robots to make people’s jobs easier) and what others do in trying to copy Toyota (using robots to eliminate jobs). Lean manufacturing stressed the importance of using brainpower people bring to work every day. You want to use technology to enable people. These scientists understand that. Unfortunately many managers don’t.

Photosynthesis: Science Explained

Another very good webcast on a science topic from Crash Course. It is packed with info, thankfully you can pause and rewind as much as you need. Well normally you can, YouTube decided to not let me do that just now 🙁

Friday Fun: Monkey and Kitten Playing

If somehow you need more to entice you to watch the webcast, there are even cameos by a dog and people. But if you need to know more than kitten and monkey maybe you need to connect to your inner 5 year old self.

Â£50m Package to Attract Scientists and Boost Welsh Economy

‘Star scientists’ Â£50m package to boost Welsh economy

First Minister Carwyn Jones said the fund would be used to encourage leading professors to move to Wales to work and boost research and the economy. It will pay for specialist equipment, top-up salaries to the level outstanding academics would expect and will fund members of their teams.
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our network plans will enable us to attract more talent to Wales to help drive this figure up and in due course create more high quality business and research jobs in Wales.” The strategy sets out three key areas to boost research and businesses – the life sciences and health; low carbon, energy and environment; and advanced engineering and materials.

The Welsh government said it wanted to see more industry-academic partnerships like SPECIFIC led by Swansea University with Tata Steel UK. The Â£20m project aims to turn homes and businesses into self-generating “power stations” by developing a special coating for ordinary building materials, such as steel and glass, that traps and stores solar energy.

The USA dominated the practice of attracting leading scientists a few decades ago. In the last decade or two Europe stepped up and was able to attract global talent. Lately Asia (Singapore, Korea, China…) has been spending to attract leading scientists. I believe Asia will continue to do so and the benefits of doing so will pay off handsomely for Asia (at the expense of Europe and the USA).

Intel Science Talent Search 2012 Awardees

Nithin Tumma, whose research could lead to less toxic and more effective breast cancer treatments, received the top award of $100,000 at the Intel Science Talent Search 2012, a program of Society for Science & the Public. Other finalists from across the U.S. took home additional awards totaling $530,000.

The Intel Science Talent Search, the nation’s oldest and most prestigious pre-college science and math competition, recognizes 40 high school seniors who are poised to be the next leaders in innovation and help solve some of the world’s greatest challenges.

Nithin Tumma, 17, of Fort Gratiot, Mich., won the top award of $100,000 from the Intel Foundation for his research, which could lead to more direct, targeted, effective and less toxic breast cancer treatments. He analyzed the molecular mechanisms in cancer cells and found that by inhibiting certain proteins, we may be able to slow the growth of cancer cells and decrease their malignancy. Nithin is first in his class, a varsity tennis player and a volunteer for the Port Huron Museum, where he started a restoration effort for historical and cultural landmarks.

Second place honors and $75,000 went to Andrey Sushko, 17, of Richland, Wash., for his development of a tiny motor, only 7 mm (almost 1/4 inch) in diameter, which uses the surface tension of water to turn its shaft. Born in Russia, Andrey worked from home to create his miniature motor, which could pave the way for other micro-robotic devices. Andrey, a long-time builder of small boats, recently filed for a Guinness World Record for the smallest radio-controlled sailing yacht.

Third place honors and $50,000 went to Mimi Yen, 17, of Brooklyn, N.Y., for her study of evolution and genetics, which focuses on microscopic worms, specifically looking at their sex habits and hermaphrodite tendencies. Mimi believes that through research such as hers, we may better understand the genes that contribute to behavioral variations in humans. Mimi was born in Honduras and is fluent in Cantonese. She plays French horn and volunteers to prepare and deliver meals to people with serious illnesses.

These finalists join the ranks of other notable Science Talent Search alumni who over the past 70 years have gone on to win seven Nobel Prizes, two Fields Medals, four National Medals of Science, 11 MacArthur Foundation Fellowships and even an Academy Award for Best Actress.

“We invest in America’s future when we recognize the innovative achievements of our nation’s brightest young minds,” said Intel President and CEO Paul Otellini. “Hands-on experience with math and science, such as that required of Intel Science Talent Search finalists, encourages young people to think critically, solve problems and understand the world around them. Rather than simply memorizing facts and formulas, or repeating experiments with known outcomes, this competition engages students in an exciting way and provides a deeper level of understanding in such important but challenging subjects.”

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Thorium Nuclear Reactors

Kirk Sorensen is founder of Flibe Energy and is an advocate for nuclear energy based on thorium and liquid-fluoride fuels and author of Energy From Thorium blog.

He also taught nuclear engineering at Tennessee Technological University as a guest lecturer. He is active in nonprofit advocacy organizations such as the Thorium Energy Alliance and the International Thorium Energy Organization. He is married and has four small children.

See another video with him on why the thorium molten-salt reactor wasn’t developed (from a Google tech talk).

Science Continues to Explore Causes of Weight Gain

Science is amazing when it explains very cool ideas. It is also very interesting (if a bit frustrating) when the scientific inquiry process is ongoing and open to debate. Weight gain is one such area that is of great concern and large amount of study but some issues are still unclear. I have discussed this before. I think that calories in compared to calories consumed is a good first approximation. I believe it makes sense that the efficiency of our bodies at capturing the calories and turning them into weight gain could be affected by things other than the total calories in. It might be the type of calories or it might be other factors (bacteria or chemical present)…

What’s Really Making Us Fat?

Researchers in a relatively new field are looking at the role of industrial chemicals and non-caloric aspects of foods — called obesogens — in weight gain. Scientists conducting this research believe that these substances that are now prevalent in our food supply may be altering the way our bodies store fat and regulate our metabolism. But not everyone agrees. Many scientists, nutritionists, and doctors are still firm believers in the energy balance model. A debate has ensued, leaving a rather unclear picture as to what’s really at work behind our nation’s spike in obesity.
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A widely reported study that came out in January in The American Journal of Clinical Nutrition (AJCN) would seem to dispute this finding: it confirms the belief in the energy balance model, and has been cited as proof by many researchers working in the field. I asked an author of the study, Dr. George Bray, professor of medicine at Louisiana State University, about the myriad of additives and industrial ingredients in our food that were not accounted for in this study. “It doesn’t make any difference,” he said in a telephone interview. “Calories count. If you can show me that it doesn’t work, I’d love to see it. Or anybody else who says it doesn’t — there ain’t no data the other way around.”

It seems to me that it certainly makes sense to reduce calories if you need to lose weight. And it sure seems the strongest evidence is for calories being the most important factor.

I also believe exercise is good, for overall health. It also seems more and more evidence is being found about how difficult it is to lose weight which reinforces the importance of preventing the weight gain in the first place.

Dolphins Saved by People

Is this a bit like man bites dog? In any case it is a happy event. I wish I could have helped.

Star Stuff: The Universe is In Us

Great statement from Neil DeGrasse Tyson on “what is the most astounding fact you can share with us about the universe.”

“The atoms that comprise life on earth, the atoms that make up the human body, are traceable to the crucibles that cooked light elements into heavy elements in their core under extreme temperatures and pressures. These stars, the high mass ones among them, went unstable in their later years. They collapsed and then exploded scattering their enriched guts across the galaxy. Guts made of carbon, nitrogen, oxygen, and all the fundamental ingredients of life itself. These ingredients become part of gas clouds that condense, collapse, form the next generation of solar systems: stars with orbiting planets. And those planets now have the ingredients for life itself. So when I look up at the night sky and I know that, yes we are part of this universe, we are in this universe, but perhaps more important than both of those facts, is that the universe is in us… my atoms came from those stars….”

I think this might well be my thought on the most astounding fact also. Ever since I learned the atoms we are made of were created inside stars it has never ceased to amaze me.

Neil DeGrasse Tyson is amazing. I would edit his statement a bit myself, though, to make it:

“The most astounding fact is that the atoms that comprise life on earth, the atoms that make up the human body, were created in the crucible of stars that cooked light elements into heavy elements. Those stars went unstable, in their later years: they collapsed and then explored scattering their enriched cores across the galaxy. Those stars made the carbon, nitrogen, oxygen, and all the fundamental ingredients of life itself. Those ingredients became part of gas clouds that condensed to form the next generation of solar systems: stars with orbiting planets. And those planets have the ingredients for life. So when I look up at the night sky, I know that my atoms came from the predecessors of the stars I see.”