Mikedowney.co.uk
What's New
Site Map

Diary
Astronomy
Bits N Bobs
Computing
Food And Drink
Links
Photography
Welcome


Recipe Collections
Recipe A Week 2013
Recipe A Week 2010
A-Z of Regional Cakes


Selected Entries
Pinhole Photography
Keeping Quail
Coventry
Recipes
A different recipe each week
Friends websites
Oven Temperatures and Measuring Cups


Most popular stories
A Hamster's Home is his C...
Hamster Peanuts
Simple HDR photography wi...
A Tangfastic Mess
Pizza, Hamsters and Ballo...
Hamster Baby Update
Decaffeinated Coffee
Halloween Animal Beds
More Squirrel Photos
Not Quite HDR photography
Giant Sunflowers


RSS Feeds:
RSS Feed Entire Site.
RSS Feed Diary only.



Powered by Blosxom


Pinhole Photography Ring
pinhole webring logo
powered by RingSurf
Next | Previous
Random Site | List Sites

Artificial Life

Story location: Home / science /
07/Nov/2011

Last year the Craig Venter Institute announced that they had created an artificial bacterium. I thought I should follow up last months discussion of the Origin of Life with an overview of the claims, even though it is now considered 'old news' now.

Traditionally, genetically modified organisms (GMOs) are created by taking the DNA from an existing organism and identifying the gene responsible for a particular behaviour. In the most widely publicised cases, this has involved taking crop plants and adding genes from other species to add resistance to pesticides or to make the plant create an insect-repelling chemical.

See more ...



The Origin of Life on Earth, part 2.

Story location: Home / science /
07/Oct/2011

In part 1, I discussed how early life may have arisen. In this part I will comment on one of the aspects of current terrestrial life - that of molecules symmetry or 'handedness'.

Molecular handedness, which chemists call Chirality, is a property of the 4 bonds which a carbon atom can form. If a particular carbon has 4 different groups of atoms attached to it, then there are two ways of attaching them such that one is a mirror image of the other. These are the two chiral forms, which are referred to as D- or L-isomers depending on the particular arrangement. In the 'skeleton' form of the amino acid Leucine, shown below, triangles mean the bond is pointing towards the viewer and the 'ladder' is a bond pointing away.

See more ...



The Origin of Life on Earth, part 1.

Story location: Home / science /
06/Oct/2011

This week's science posting is in two parts. Part 1 covers a few theories about how life arose on Earth. Part 2 goes into a bit more detail on the molecules of life.

How Life came to Earth

There are two main theories on how life started on Earth: It came from Outer Space, and it started here on Earth. I will briefly describe the two approaches.

See more ...



Sugar fermentation in yeast (follow-up)

Story location: Home / science /
03/Oct/2011

After last week's post about Yeast, I received a couple of questions asking for a bit of clarification. I thought it would be a good idea to post the questions and my response here.

See more ...



Sugar fermentation in yeast

Story location: Home / science /
30/Sep/2011

This is the first in a short series of science-related posts where I will be explaining a bit of science behind some things which are of particular interest or relevence to me. I will be starting with fermentation since it is important in both baking and wine- and beer-making.

See more ...