In honor of Mothers everywhere, we are unashamedly recycling this post because it’s just that good.
General
Don’t Judge a Cheetah by Its Spots: New Insights into the Genetics and Evolutionary History of African and Asiatic Cheetahs
The genetics of wild cheetah (Acinonyx jubatus) populations has a special significance for me. In fact, it could be said that the population genetics of cheetahs changed my life. I first learned about the low genetic variability in cheetahs in a darkened lecture hall at Iowa State University in 1988. I was so fascinated by what I learned in those lectures about genetics and its importance in conservation efforts that I eventually changed my major to Genetics. “The Cheetah Papers” as a colleague calls them, were, and perhaps still are, common teaching tools for biology and genetics classes. And why not? The results were amazingly cool, if a bit disturbing. Imagine a population that, through a series of natural events over thousands of years, had become so genetically similar to one another as to be almost clonal.
Still, if science teaches us nothing else, it teaches us that there is always more to the story. Continue reading “Don’t Judge a Cheetah by Its Spots: New Insights into the Genetics and Evolutionary History of African and Asiatic Cheetahs”
Recycle or Compost? Sorting Out the Cornstarch from the Plastic
Environmental concerns have driven people to seek products that are not derived from petroleum. This has translated into people using products from renewable resources for serving food and beverages. Now you are drinking iced tea out of corn plastic cups or coffee from paper cups labeled as ecofriendly. What does this label mean and what do you do with them when you have consumed your beverage?
Continue reading “Recycle or Compost? Sorting Out the Cornstarch from the Plastic”Pop Pi Quiz
Teachers, architects and engineers have found the mathematical constant, π, to be an invaluable tool for understanding and changing the world around us. Without Π, we would not be able to quickly calculate the area of a circle. To celebrate Pi Day (March 14th), today’s mental exercise will be to test your knowledge of Π. Are you ready for more Π?
1) What does Π represent?
a) The ratio of the circumference of a circle to its diameter
b) A rounded value of 3.14
c) The 16th letter in the Greek alphabet
d) All of the above Continue reading “Pop Pi Quiz”
Lab Equipment Today: Kitchen Gadget Tomorrow?
My husband likes to cook and he also likes to collect kitchen gadgets. Mushroom slicers, blenders, numerous graduated vials and measuring devices, meat thermometers, etc., our kitchen drawers are overflowing with the essentials for precision cooking. For each culinary process, there is a unique device, and he uses them all. I do not even know what some of them are for. I only use knives and measuring cups. But his cooking is way better than mine so there is obviously some benefit to using the right tools well.
Some of the most sophisticated kitchen tools come straight from the laboratory. I was interested to read an article in the March 2011 issue of Scientific American describing how high-speed centrifuges are among the newest trends in fancy kitchen equipment. They are being used in restaurants to separate ingredients into their component parts and create potent flavorings. It turns out that centrifugation is a fast and convenient way to purify fat from various vegetables and nuts, creating interesting flavored butters and dairy-free creams (think pea butter or essence of carrot). Centrifugation is a fast alternative to straining or filtering as a means of separating components.
Continue reading “Lab Equipment Today: Kitchen Gadget Tomorrow?”Satellites and Sea Turtles: Can We Save the Last Member of the Genus Dermochelys?
Let me start out by saying: I love sea turtles. I can’t explain why, but they fascinate me. I have sweatshirts, bags and artwork with sea turtles on them. I even make jewelry with sea turtle themes. Ask anyone who knows me; I have a thing for sea turtles. So when I came across the article “Tracking leatherback turtles from the world’s largest rookery: Assessing threats across the South Atlantic” in the Proceedings of the Royal Society B (1), all thoughts of writing about anything else were readily dismissed. How could I NOT write about leatherback sea turtles? Continue reading “Satellites and Sea Turtles: Can We Save the Last Member of the Genus Dermochelys?”
Sailing: Relaxing Pastime or Dangerous Sport?
Sailing has always struck me as a civilized, relaxing way to spend a beautiful summer day. I imagine sitting on the boat’s deck in a sundress with a big floppy hat to keep the sun off of my face, a cold beverage in hand and perhaps a picnic basket of sandwiches at my feet. What could be more tranquil than gently gliding along the water’s rippling surface, with just enough of a breeze to keep you cool on a hot sunny day?
That’s how I envision sailing, and it will be obvious to many of you from this description that I do not sail. However, my husband and many of my friends do, and they tell a very different account, especially during a race: Sailors quickly moving around the deck, tackling and subduing unruly spinnakers, dodging booms and other hazards, and in general just trying not to fall overboard, especially on those days when it is blowing 20 (translation for us nonsailors: days with 20-mile-per-hour winds). Thus, a recent paper in the December issue of the journal Wilderness & Environmental Medicine caught my attention (1). In it, the authors report the frequency and types of injuries sustained by sailors while sailing. Those of you who sail will not be surprised by the findings, but I was. Sailing is more dangerous than I imagined. Continue reading “Sailing: Relaxing Pastime or Dangerous Sport?”
Harry Potter Sings the Elements
I went to see Harry Potter and the Deathly Hallows this weekend, and thoroughly enjoyed it. I dismissed the idea of blogging about it because it seemed unlikely that there would be a connection with science.
I was wrong. This is for scientist Potter fans.
[youtube=http://www.youtube.com/watch?v=rSAaiYKF0cs&rel=0&hl=en_US&feature=player_embedded&version=3]
When a Cold, Wet, White Nose Isn’t a Good Thing
On February 16, 2006, a recreational caver exploring Howes Cave in Albany, New York, photographed a bat with an unusual white growth on its muzzle. In the few years since that picture was snapped, hundreds of thousands of bats in North America have died from White-Nose Syndrome (WNS; 1,2).
The disease affects hibernating populations of bats, and has been found in the northeastern and eastern United States, as far south as Tennessee, as well as in the Canadian provinces of Quebec and Ontario (2).
Some suffering bats are emaciated with little or no body fat and have a characteristic white fungal growth on their wing membranes, ears and muzzles, hence the name “White-Nose Syndrome.” Instead of hibernating all winter, these bats can be seen active in the snow, when there is virtually no food available for them (1,2).
The white fungal growth observed on the bats is the result of infection with a previously undescribed cold-loving fungus,
Continue reading “When a Cold, Wet, White Nose Isn’t a Good Thing”Top 10 Things to Do When You (or Your Kids) Have Too Much Halloween Candy
10. Set a daily limit. (An ounce of prevention is worth a pound of cure.) Allow X number of pieces of candy per day, then put the bag away, under lock and key.
9. Parental help (good for the child, not so good for the parent). In my childhood, though it was not apparent at the time, Dad was helping by eating some of the candy. Many Promega parents engage in this practice with their children now.
8. Burn more energy. Go for a run or walk or outside to play. For every X pieces of candy, a walk or bike ride around the block. Continue reading “Top 10 Things to Do When You (or Your Kids) Have Too Much Halloween Candy”
