Friday, 21 January 2011

SOS: Save our Science - Seeing Sharks!!
This is the end of my first week in the second lab, it's pretty fun so far, quite enjoying the variety of things I've become involved in and will hopefully get some very exciting data. It's going to be a busy term though. Anyway, more on that later. Here's some fishy news from Australia!

It is a commonly quoted fact that sharks can smell a single drop of blood in over 100 litres of water. As a top predator a shark needs highly developed senses to hunt, so it is surprising that many species are probably completely colour blind! Sharks still have excellent vision, but it is monochromatic i.e. Black and white.

The blacktip reef shark (Carcharhinus melanopterus), one of the species in the study, which lacks cone cells (source)

Sunday, 16 January 2011

SOS: Save our Science - Preventing Pandemic

Hey! I've been busy finishing my first project and after some last minute panicking it's all over and I'm moving on from chickens to yeast, but before I do I wanted to share this new story. A breakthrough in preventing the spread of Bird Flu, that has applications in protecting against a wide range of other viruses. This is the sort of story I've been looking forward to writing for a while, I hope you'll see why.

A group of researchers may have found a way to prevent the spread of bird flu through domestic populations, a revolution which could significantly reduce the risk of humans becoming infected. Not only that, but this technique could be easily used to protect against any viral infection in almost any species. It could even eventually be used to protect ourselves. This method requires no vaccinations and provides life-long protection from a broad range of different avian flu strains.

Tuesday, 4 January 2011

SOS: Save our Science - Cryptochrome, lord of time.

 I knew it'd happen sooner or later, I've started falling behind on postings. I'd hoped to put this up on New Year, but that didn't happen. Anyway, Happy New Year to all, hope you all enjoyed yourselves. I've been writing the report on my first project. The first draft is now done. Still a lot to do, and only 1.5 weeks until it's back to work. The next project is all about cytoskeleton and growth in yeast, so a bit different, I'll tell you more once I actually know anything...

So this is a relatively new paper I found, investigating how flies, and possible humans keep track of the time of day and how this is affected by our environment i.e. the sun. It seemed appropriate to do a time piece to see in the new year. Also I'm really excited as this will be my first official Research Blogging post!!

How do you know if it’s day or night? Simple, right? You look at your watch or you look outside. The differences are pretty obvious. But your body actually keeps track of these things itself. Certain proteins in your body keep track of the time of day. This system has been around for billions of years, and is shared between plants and animals.

The subconscious ability to tell night and day depends on circadian rhythms; regular changes in the presence and activity of timekeeper proteins within a part of your brain called the pineal gland (so named because it looks like a pine cone). Experiments have shown that in a room with no clocks and no changes in light levels a human will fall into a roughly 24 hour cycle of sleeping and waking (average 24 hours 11 mins). The average cycle differs between species and in some arctic species appears to be intermittent. Although the cycle is entirely self-sustaining it is trained and altered by light input, modifying it to be more exactly 24 hours long. This involves light sensitive proteins in your eye which signal to the pineal gland.