|
Subject |
Comments |
Views |
Author |
Date Written |
What are varicose veins?
|
view preview
Varicose veins in a patient's lower leg. The veins, which carry blood back to the heart, are swollen, irregular and distorted. Varicose veins are most common in the legs, but may also be found in the oesophagus or testis. They occur when valves, which usually prevent the backflow of blood and support the pressure from the blood above, become leaky. The veins then stretch and bulge. Support stockings are usually used to treat the condition, although in some cases surgery is needed to remove the veins. Pregnancy, being overweight, and standing for long periods, all increase the risk of varicose veins. ...
|
|
|
1 |
3278 |
duddy |
11 years ago |
Flowers that look like monkeys
|
view preview
These are monkey orchids ( Orchis simia). This species can be found in Europe, the Mediterranean, Russia, Asia Minor, and Iran.
|
|
|
4 |
3690 |
duddy |
11 years ago |
I Think You Meant Mutation
|
view preview
‘’I’m afraid you have the gene for Breast Cancer…’’ No, I’m afraid that the quote above is a common misconception and one that this post aims to correct. I know that in previous posts I have emphasized the ambiguity of certain genetic lingo, but in this post I am to enforce the clarity of one such piece of lingo…Mutations. All the ENCODE hype has certainly brought molecular genetics to the forefront of the scientific stage and such exposure inadvertently highlights some trivial mistakes. On numerous occasions, I have heard people (from all ranges of scientific backgrounds) use phrases very similar to that set at the top of this page. Phrases declaring that ‘he was unlucky to have the gene for Huntington’s disease’ or ‘it was just in h ...
|
|
|
0 |
2990 |
Chapman333 |
11 years ago |
A Genetically Modified World...?
|
view preview
Genetic modification is one of the most controversial topics in all of modern science and with the advancement of synthetic biology over the last decade or so it is sure to become even more of a talking point in the future. Genetic modification is a subject that most people seem to have an opinion on, but I must say that a great deal of those opinions are built upon misconceptions or influenced by the charm of organic propaganda. I cant help but find such misunderstandings quite ironic, for example, the man who strongly opposes the consumption of genetically modified foods, yet requires the injection of insulin produced via genetically modified micro-organisms to keep his diabetes under control, to name just one such example. It seems that ...
|
|
|
10 |
3621 |
Chapman333 |
11 years ago |
Epigenetics - Regulating the Code...
|
view preview
‘’These patterns of gene expression are governed by the cellular material — the epigenome — that sits on top of the genome, just outside it (hence the prefix epi-, which means above). It is these epigenetic "marks" that tell your genes to switch on or off, to speak loudly or whisper. It is through epigenetic marks that environmental factors like diet, stress and prenatal nutrition can make an imprint on genes that is passed from one generation to the next.’’ Time Magazine (2010) The quote above may well be a few years old now, but its importance is abundantly obvious. Although, three years may have passed since that issue of Time magazine was distributed, a great deal of people have still never heard of epigenetics and those that have know v ...
|
|
|
2 |
2650 |
Chapman333 |
11 years ago |
|
0 |
3839 |
duddy |
11 years ago |
Pharmacogenomics?
|
view preview
In recent posts I have discussed the potential medical and anthropological impacts (mainly benefits admittedly) of genetic modification and research in epigenetic phenomena. Whilst trawling through various journals and publications I constantly bumped into that term ‘pharmacogenomics’ . Then, it occurred to me that a discussion of that daunting subject just needed to be my next venture; it seems that pharmacogenomics is not as well publicized as similar areas of genetic research, yet equally interesting and controversial. Pharmacogenomics was an idea born out of the aftermath of the human genome project, when it became obvious that sequencing a human genome was very much a feasible idea . Many people thought that by unlocking the information ...
|
|
|
0 |
2897 |
Chapman333 |
11 years ago |
Snow tunnel found in Russia
|
view preview
This snow tunnel near the Mutnovsky Volcano in Russia is almost a kilometre long. These tunnels form under the snow fields in deep ravines at the end of the summer thaw. Meltwater flows through glaciers towards lower elevations, finding an outlet at the terminus of the glacier and carving the ice on the way. The Mutnovsky Volcano is found in the southern part of the Kamchatka Peninsula.
|
|
|
1 |
3148 |
duddy |
11 years ago |
|
0 |
3484 |
duddy |
11 years ago |
Synthetic Biology: Origins, Scope & Biofuel
|
view preview
The emerging field of synthetic biology is affirming itself at the forefront of modern science, possibly offering practical, effective solutions to many of the worlds most pressing problems. Described most simply as the ‘design and construction of new biological entities…’ synthetic biology, at first, seems to be a natural progression from twentieth century genetic engineering . However, synthetic biology sets itself a slightly different ethos, the central ‘from the bottom up’ dogma of the field means that organisms are designed, programmed, built, not just slightly altered or adjusted. Origin & ScopeAlthough synthetic biology has only recently entered the scientific limelight, it was first mentioned back in 1912 by French biologist Stephan ...
|
|
|
0 |
3272 |
Chapman333 |
11 years ago |
Why do some people sneeze after staring into bright light?
|
view preview
18% to 35% of people are "sun sneezers" who have genetically inherited the photic sneeze reflex. The photic sneeze reflex (also known as photoptarmosis) is a condition of uncontrollable sneezing in response to numerous stimuli, such as looking at bright lights or periocular (surrounding the eyeball) injection. Unfortunately, its exact mechanism of action and evolutionary purpose is not well understood. ...
|
|
|
0 |
2893 |
bio_man |
11 years ago |
A white-blooded ice fish
|
view preview
This is a white-blooded ice fish, or "crocodile fish" ( Chaenocephalus aceratus). They lack both red blood cells and hemoglobin, and so have white blood. They have translucent bodies, and absorb oxygen directly from the water around them.
|
|
|
0 |
2660 |
duddy |
11 years ago |
Geep!
|
view preview
A goat-sheep chimera also known as a geep all over the world is normally produced by the fusion of the embryos of both a sheep and a goat. The animal formed by this method thus has cells of not only goat but also of sheep origin. Those parts of the chimera that grow from the embryo of a sheep are woolly. Whereas those that grow from the embryo of a goat turn out to be hairy.
|
|
|
0 |
3933 |
duddy |
11 years ago |
A hybrid dolphin whale
|
view preview
The wolphin is the extraordinary result of breeding a female bottle-nosed dolphin with a male false killer whale. In captivity there are two occurrences, both are in the Sea Life Park in Hawaii. Unlike other hybrids, the wolphin is fertile.
|
|
|
0 |
5698 |
duddy |
11 years ago |
How to make meat in a lab
|
view preview
The biomass pyramid above shows how a large amount of plant matter is eaten by many small animals which are in turn eaten by fewer numbers of large animals. At each step of the biomass pyramid, matter and energy are lost in the form of energy to keep the animal warm and moving, or as faeces and urine. Therefore, the more steps there are in a biomass pyramid, the more loss of matter and energy that occurs. Humans are usually at the top of the Food Chain or biomass pyramid (unless we are eaten by sharks, lions or bears!). Also, there is often a significant loss of matter and energy at each step that can be avoided. Does that mean that we should all become vegetarians? No. However, we can eat more vegetables and less meat. Food security is an im ...
|
|
|
0 |
3221 |
bio_man |
11 years ago |