December 5, 2013

Link to Rotary Evaporation

Advent Chemistry: Rotary Evaporation

Consider this: You’ve got a flask of liquid. In the flask is some solvent, and dissolved in it (along with probably some leftover bits and pieces of raw material that you don’t care about) is your product. How do you get the product out? You...

Advent Oil & Gas: Well drilling – bits and string

I’ve already mentioned drilling as part of exploration and appraisal, but how does it actually work?  The well-publicised image of an oil derrick is only the visible part of a complicated engineering system, intended to drill through immense thicknesses of rock and to extract valuable...

December 4, 2013

More things with numbers

Advent Computing: More things with numbers

The last two posts have been about how a computer converts between the numbers it stores and letters and symbols you see on your screen or out of your printer. But computers don’t just use numbers for storing text. Computers use numbers for everything. One...

Advent Oil & Gas: Prospecting and exploration

Based on our knowledge of oil and gas formation we can make some reasonable guesses as to where they can be found.  The best places to look are sedimentary rock basins, especially those that are close to faults and plate boundaries – but there over...

Advent Chemistry: Freezing Mixture

How do you make things cold? This isn’t an academic question. Quite a lot of reactions, some of them very ordinary lab procedures, put out heat. You don’t want to burn yourself or your worktop on scalding hot glass because your mixture is hot, and...

December 3, 2013

More bits

Advent Computing: More bits

Yesterday I talked about encoding characters, i.e. letters and numbers and symbols, in bytes. One byte can represent any number between 0 and 255, and the near-universal standard known as ASCII gives a specific character for any number between 0 and 127. If you write...

Advent Oil & Gas: Reserves and reservoirs

Having looked at how oil and gas are formed, it makes sense to look at where it all is now.  Everyone knows that you oil and gas are found underground, but you can’t just drill anywhere and find the stuff. Oil and gas reservoirs need...

A Buchner funnel and side-arm flask

Advent Chemistry: Filtration, Faster

So, as mentioned, filtration is really slow. Sufficiently so that in reality, it’s hardly ever done that way. Unless there’s a compelling reason not to subject your mixture to anything more aggressive than gravity, you use a related, but more complicated bit of kit, and...

December 2, 2013

Bits

Advent Computing: Bits

If you watched yesterday’s video, you’ll have spotted the symbols that were being written to that “infinitely long” tape were “1” and “0”. There’s a reason binary – counting with only ones and zeros – is used so extensively in computing, and it’s essentially that it’s much...

Advent Biology: One bat, two bats, three bats, four…

So yesterday I started with bat transect surveys. While relatively quick and able to be carried out with minimum experience, in most environments and with fairly basic kit-though you can of course use more exciting and expensive equipment, like the EM3 which I’ll take a...

Pages:«1...567891011...18»