Clipmarks | Biology Clips

Custom Essays

Wed, 11 Nov 2009 12:36:12 GMT

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Engineered Rabbit Penises Raise Human Hopes

Tue, 10 Nov 2009 10:18:45 GMT

clipped by: tabsey
clipper's remarks: Clipped for the headline. No doubt this will be all over the web. How is the Catholic Church on this sort of tamponing, I mean tampering, with nature. Probably for it. Help the population grow beyond the planet's ability to cope.

Clip Source: www.wired.com

Using tissue grown in a laboratory, researchers have engineered fully functional replacement penises. The organs were made for rabbits, but the technique may someday be useful for people.

“This technology has considerable potential for patients requiring penile construction,” wrote researchers in a study published Monday in the Proceedings of the National Academy of Sciences.

Leading the team was Anthony Atala, director of Wake Forest University’s Institute of Regenerative Medicine. Atala is best known for developing a technique in which cells are taken from an organ and sprayed onto a frame made of collagen, the primary structural protein in animal tissue. The structure is then bathed with growth-stimulating compounds and kept in an oven that duplicates the body’s temperature and chemical composition.

Given these starting conditions, natural biology does the rest. The cells divide and arrange themselves in natural, working configurations.

Tags: ethics

Science Tattoo Emporium

Mon, 09 Nov 2009 07:15:20 GMT

clipped by: chestnut501
clipper's remarks: Scientists who have tattoos of their science.

Clip Source: blogs.discovermagazine.com

Duygu writes, “I am a developmental biologist by training.

However, I have been an evolution enthusiast and also an activist for educating public about the theory of evolution for a long time. I could not imagine a better tattoo: Darwin’s finches arranged to look like a butterfly…I got it in 2009–Darwin’s 200th anniversary and On The Origin of Species‘ 150th anniversary.

Clip Source: blogs.discovermagazine.com

All Creatures Great And Small

The Three Faces of Life

Let the Stars and the Ink Guide You Home

A Million Ankles And You’ve Got A Laptop

The Imaginary Vortex

Clip Source: blogs.discovermagazine.com

Pandora’s Viruses

A Sea of Uranium

LSD Redux

Top Predators of the Past

Old Four Lobes

Clip Source: blogs.discovermagazine.com

Jellyfish

Hidden Biology

A Trilobite

Clip Source: blogs.discovermagazine.com

Dromeosaur

The Periodic Table

Carnivore Skull

Bugs, Etc.

Clip Source: blogs.discovermagazine.com

Einstein v. Newton

Galileo

Cephalopod

Mobius Strip

Clip Source: blogs.discovermagazine.com

The Guardian of the Genome

Tropical Newton

Eye of Newt, Oil of Meteorite

Tags: science, scientists, art, tattoos, evolution, biology

Sex and school don’t mix

Sun, 08 Nov 2009 15:11:53 GMT

clipped by: Tri-City Psychology

Clip Source: www.timesonline.co.uk

So Ed Balls has decreed that sex education will be compulsory. (At the moment, parents can opt out if they don’t fancy the idea of their little darlings being given the facts of life by spotty Mr Boil in a grotty classroom.) From 2011 the nanny state will be given full control of the birds and the bees (opening instalments from age five; no parental opt-out at all for 15-year-olds) and if you bunk off, you will be fined.

Sex ed has, of course, always been a bit of a joke. I have vivid memories of a flustered biology teacher showing 30 tittering girls how to put a condom on a boiling tube (the tube was rather puny, and the rubber sagged off it like an old balloon; poor Mrs W stuttered that it wasn’t quite like that in real life).

The argument expounded by Balls is that knowledge is power: telling kids how it all works and encouraging them to use contraception is meant to enable them to say no or to take precautions.

Tags: sex education

Dissertation Assistance

Sat, 07 Nov 2009 13:14:53 GMT

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Hormones are the Switch For the Lantern Shark

Sat, 07 Nov 2009 06:03:11 GMT

clipped by: celestialdancer
clipper's remarks: http://link.brightcove.com/services/player/bcpid46203255001?bclid=46205328001&bctid=48806401001

That is the link to the video that wouldn't clip. The article is fascinating...

Clip Source: www.wired.com

The safe answer to how a lantern shark turns its luminescence on and off is: “Any way it wants.” Now researchers have looked into the belly of the beast and found that three hormones act as on-off switches for these glow-in-the-dark sharks. It is the first discovery of hormones controlling bioluminescence in animals, the scientists report in the November 15 Journal of Experimental Biology.

In all animals investigated up to this point, luminescence is triggered by nerve cells. Finding a parallel pathway to bioluminescence — one that’s controlled by hormones, not nerves — strongly supports the notion that light-emitting powers have evolved multiple times in animals, comments marine scientist Jim Gelsleichter of the University of North Florida in Jacksonville, who was not involved in the research.

The light-emitting cells in some sharks aren’t connected to prominent nerve cells, and the slow onset of their glow hinted that something other than nerves were involved.

Ghostly 'dance of a sea dragon'

Fri, 06 Nov 2009 23:17:41 GMT

clipped by: EddieIsSteady

Clip Source: news.bbc.co.uk

Ghostly 'dance of a sea dragon'

One of the most elegant courtship rituals in the animal kingdom has been captured on film by a BBC crew.

The dance of the weedy sea dragon takes place every year in the shallow seas off the coast of Australia.

Clip Source: www.youtube.com

[Video]

Clip Source: news.bbc.co.uk

During the ghostly dance, two beautifully odd-looking fish mirror each other's every movement.

At the end of the ritual, the male fish is the one to get pregnant, giving birth two months later, a process the BBC crew filmed for the first time.

The dance of the weedy sea dragon is captured for the BBC natural history series Life.

Clip Source: newsimg.bbc.co.uk

Clip Source: news.bbc.co.uk

"There is no sense that they are at all concerned about anything other than each other."

The mirror dance usually takes place in the fading evening light.

"What's so lovely is you feel you have seen the most intimate moments of their lives," says Mr Chapman.

The ritual usually takes place in spring.

Clip Source: newsimg.bbc.co.uk

Clip Source: news.bbc.co.uk

Sea dragons, seahorses and pipefish are the only fish species in which the males carry and raise the young.

Tags: marine-biology, seahorses, video

We Learn Our Language in the Womb

Fri, 06 Nov 2009 09:14:11 GMT

clipped by: valann 47

Clip Source: www.neatorama.com

No wonder learning a new language can be more difficult the older you get. We were learning our individual languages before we were even born! That’s what researchers revealed in a release today by Current Biology.

It seems that fetuses not only warm to the sound of mother’s voice as they gestate, they also are being programmed in the direct patterns inherent in certain languages. By the time we are born, our dialect is determined.

Wermke’s team recorded and analyzed the cries of 60 healthy newborns, 30 born into French-speaking families and 30 born into German-speaking families, when they were three to five days old. That analysis revealed clear differences in the shape of the newborns’ cry melodies, based on their mother tongue.

Specifically, French newborns tend to cry with a rising melody contour, whereas German newborns seem to prefer a falling melody contour in their crying. Those patterns are consistent with characteristic differences between the two languages, Wermke said.

Tags: science, language, biology, fetuses

Plants Recognize Their Relatives - New Study

Thu, 05 Nov 2009 21:15:25 GMT

clipped by: celestialdancer

Clip Source: www.wired.com

In a study of more than 3,000 mustard seedlings, scientists discovered that the young plants recognize their siblings — other plants grown from the seeds of the same momma plant — using chemical cues given off during root growth. And it turns out mustard plants won’t compete with their brethren the way they will with strangers: Instead of rapidly growing roots to suck up as much water and minerals as possible, plants who sensed nearby siblings developed a shallower root system and more intertwined leaves.

“It’s possible that when kin are grown together, they may balance their nutrient uptake and not be greedy,” plant biologist Harsh Bais of the University of Delaware said in a press release. The work will be published in an upcoming issue of Communicative and Integrative Biology.

The top video shows unrelated plants, while the bottom one shows siblings.

Clip Source: www.youtube.com

[Video]

Clip Source: www.youtube.com

[Video]

New Jersey Plastic Surgeon The Best Choice I’ve Ever Made

Thu, 05 Nov 2009 07:24:19 GMT

clipped by: cadengavin
clipper's remarks: I recently went to a New Jersey Plastic Surgeon and not only were the results great, but the job was done so well I’m planning on going back for more.

Clip Source: ezinearticles.com

Plastic Surgery Can Improve Your Career Prospects

By A Aaronson

You'd never think of your plastic surgeon as someone who can help you improve your career prospects, but if a new study published in the Journal of Applied Psychology is to be believed, intelligence is not the only trait that matters when it comes to climbing the corporate ladder.

The study found that attractiveness, along with confidence, can help you stand out from the herd and boost your job prospects. Actually, that's not really a new finding. It's been known for years, that no matter how much we downplay our tendency to find attractive people more appealing, it's built into our biology to do so.

Tags: new jersey plastic surgeon

molecular biology programs

Wed, 04 Nov 2009 19:36:42 GMT

clipped by: eudominguez

Clip Source: bitesizebio.com

8. ApE
ApE is an all-in-one plasmid and sequence workbench. Sequences can be uploaded to ApE manually, direct from the NCBI database or from ABI chromatogram traces. ApE can be used for sequence annotation, restriction mapping, primer design and sequence alignment. A great all round tool.

9. Cn3D
Cn3D… say it out loud… “see in 3D”. This great piece of software from NCBI is a sequence viewer with a difference. Not only does it perform 2D alignments, it also allows the user to see the position residues in the 3D protein sequence. Great for mutagenesis studies.

10. BioToolKit
This is one packed toolkit! Primer design, antibody design, microarray analysis, calculators for molecular weight, molar concentration and OD, centrifguation speed converter, label printing templates… and much more! Phew!

Tags: labwork

molecular biology program

Wed, 04 Nov 2009 19:34:51 GMT

clipped by: eudominguez

Clip Source: bitesizebio.com

1. Serial Cloner
Serial Cloner is fantastic all-in-one workbench; import and manipulate sequences, construct plasmid and restriction site maps, determine %GC and fragment TM, extract and ligate fragments, perform virtual PCR… and lots more, all in one window using a very intuitive graphical interface.

Tags: labwork

Birds use light to migrate

Thu, 29 Oct 2009 15:58:40 GMT

clipped by: Kelika

Clip Source: www.wired.com

A cell in the eye may be worth two in the beak, at least when it comes to a migratory bird’s magnetic compass. In European robins, a visual center in the brain and light-sensing cells in the eye — not magnetic sensing cells in the beak — allow the songbirds to sense which direction is north and migrate correctly, a new study finds. The study, appearing Oct. 29 in Nature, may improve conservation efforts for migratory birds.

“This is basically the sixth sense of biology, but no one knows how it works,” says study co-author Henrik Mouritsenof the University of Oldenburg in Germany. “The magnetic sense is by far the least-understood sense in the natural world.”

Migratory birds that humans have relocated often fly back to the original migratory grounds. But if researchers can figure out how the birds navigate, conservationists may be able to trick the birds into staying where it’s safe.

Tags: nature

Sperm Whale Classified Carbon Neutral

Thu, 29 Oct 2009 11:34:13 GMT

clipped by: celestialdancer
clipper's remarks: Prior analysis of whale carbon dioxide emissions attributes 25 percent of carbon dioxide emissions total to the animals in the Southern Ocean region. Subsequent computation lowers the whales’ carbon dioxide emissions estimate to 0.3 percent, which is equivalent to 17 million tons of carbon a year. Lavery and team explain that there are low levels of iron in the Southern Ocean, and the sperm whales each contribute about 10 grams of iron to the surface. Since the iron comes from the whales’ waste material, it takes the form of liquid plumes, effectively acting as a fertilizer and encouraging growth of plankton. Depending on the exact values and environmental conditions, sperm whales can then be classified “either a net carbon sink or as carbon-neutral,” Discovery writes.

Clip Source: ecoworldly.com

Because of their enormous body size, whales have been thought to contribute a considerable amount of carbon dioxide to the total greenhouse gas build-up whenever they exhale. However, Trish J. Lavery of Flinders University in Adelaide, Australia claims they – the sperms whales of Southern Ocean, at least – are falsely-accused and that they live quite a carbon-neutral life.

During the October 13 Biennial Conference on the Biology of Marine Mammals in Quebec City, Canada, Lavery talked about earlier calculations overlooking the whales’ capacity to offset their carbon dioxide emissions. The 210,000 sperm whales in Southern Ocean should be declared carbon neutral, according to Lavery. The carbon neutral status is achieved by bringing iron from the depths of the ocean to the surface whenever they feed. This extra iron in the water induces plankton growth which in turn traps carbon and prevents it from being released into the atmosphere.

Shrimp Eyes May Lead to Ultra-Quality DVDs

Tue, 27 Oct 2009 00:23:02 GMT

clipped by: EddieIsSteady

Clip Source: www.foxnews.com

Shrimp Eyes May Lead to Ultra-Quality DVDs

The amazing eyes of a giant shrimp living on Australia's Great Barrier Reef could hold the key to developing a new type of super high-quality DVD player, British scientists said on Sunday.

Clip Source: www.foxnews.com

Mantis shrimps, dubbed "thumb splitters" by divers because of their vicious claws, have the most complex eyes in the animal kingdom.

They can see in 12 primary colors, four times as many as humans, and can also detect different kinds of light polarization — the direction of oscillation in light waves.

"The mechanism we have found in this eye is unknown to human synthetic devices. It works much, much better than any attempts that we've made to construct a device," researcher Nicholas Roberts told Reuters.

He believes the "beautifully simple" eye system, comprising cell membranes rolled into tubes, could be mimicked in the lab using liquid crystals.

Details of the mantis shrimp research were published in the journal Nature Photonics.

Tags: shrimp, marine-biology, science, technology