Russian
researchers reported last week that they’d discovered a very well
preserved mammoth carcass lying under ice and tundra in the Lyakhovsky
Islands north of the Arctic Circle. Word of the find, and the fact that
flowing blood was recovered from the beast, spread around the popular
press like wildfire. “The fragments of muscle tissues, which we’ve found
out of the body, have a natural red color of fresh meat,” said
expedition leader Semyon Grigoriev in a statement
from North-Eastern Federal University (NEFU) in Yaktusk, Siberia. “The
blood is very dark, it was found in ice cavities bellow the belly, and
when we broke these cavities with a poll pick, the blood came running
out.”
Grigoriev noted that the discovery could be just the spark needed for a
joint mammoth cloning project between NEFU and the South Korean Sooam Biotech Research Foundation.
“It was important to discover the mammoth in cold weather, because the
unique discovery would melt in summer or autumn, and the priceless
material for joint project ‘Mammoth rebirth’ of NEFU and Sooam
foundation could disappear from thawing and wild animals,” he said.
But is the hope of finding viable DNA and possibly even intact cells in the mammoth really that high? Scientific American
reached out to some mammoth experts who weren’t involved in the latest
discovery, which was announced in the press before publication in the
scientific literature, to temper the enthusiasm. “[The Russian team has]
not found any ‘living cell’—at most they could hope to find what the
cloning enthusiasts might call a cell with ‘viable’ DNA, meaning that it
would be intact enough to use in the context of a cloning effort,”
wrote Daniel Fisher of the University of Michigan in an email to Scientific American.
“In fact, although there is much talk of ‘viability’ of this sort, I
think it remains to be demonstrated that any DNA from a mammoth meets
this criterion. In general, ancient DNA is highly fragmented and by no
means ‘ready to go’ into the next mammoth embryo.”
The University of Manitoba’s Kevin CampbellScientific American
that the blood, which is apparently still in a liquid state even at
-17° C, very well could contain intact proteins. “Since the sample was
collected from outside the body, it is likely that there is also
‘contamination’ from myoglobin and possibly bacteria (for example),” he
wrote in an email to the magazine. “Based on the color alone, I think it
is pretty safe to say that there is indeed a fair amount of hemoglobin
(and possibly myoglobin) in the vials.”
, who has participated in research that successfully reconstructed mammoth hemoglobin using ancient DNA, told
Cambell and Fisher both indicated that the mammoth research community
is very interested in this recent discovery and that the newly unearthed
carcass will now be studied in great detail to answer some of these
intriguing questions.
SALAMI TAIWO SCIENCE BLOG.
This is a blog that explains more about science,technology and create more research.
Monday, 10 June 2013
Monday, 18 February 2013
Drugged Fish Act Different
An anti-anxiety medication that has found its way from water
treatment plants into ponds and streams of Europe may alter the behavior
of perch even at low concentrations, according to a study published
today (February 14) in Science.
Fish exposed to the drug, called oxazepam, tended to eat more quickly
and were more active and less social than they had been prior to drug
exposure and compared with their unexposed peers.
“It’s definitely an interesting study,” said David Skelly, an ecologist at Yale University who was not involved in the research. “It’s joining a group of exposure studies that are showing very clearly that the individual chemicals that are showing up as environmental contaminants are ecologically relevant.”
Previously researchers have raised concerns about all manner of pharmaceuticals in the water, from estrogens suggested to cause reproductive abnormalities in frogs to psychoactive drugs linked to autism in fish. Oxazepam is a type of benzodiazepine, drugs that work by binding to GABA receptors and are used to treat anxiety. Since many animals have these receptors, it stands to reason that benzodiazepines might influence animal behavior, Brodin said, but they “weren’t being studied [in animals] in environmentally relevant quantities.”
Testing effluent from a sewage treatment plant in Sweden and downstream water from the River Fyris, environmental scientist Tomas Brodin of UmeĆ„ University and colleagues found 0.58 micrograms of oxazepam per liter in the river and 0.73 micrograms per liter in the treated wastewater—concentrations consistent with previously reported levels of benzodiazepine drugs in other parts of the world.
The researchers then took European perch raised in clean water and put them in water with either a low dose of 1.8 micrograms of oxazepam per liter, or a high dose of 910 micrograms per liter. By the end of the 7-day treatment, the fish on the lower drug dose had accumulated levels of oxazepam in their tissues similar to those found in wild perch in the River Fyris.
Following exposure to the medicated water at either the high or low dose, fish spent more time swimming around their tanks. When the scientists put zooplankton in water, the exposed fish found and ate them more rapidly than the control fish, but showed low interest in other fish. The researchers also found that fish treated with the high dose of the drug scored higher on tests of boldness, or their willingness to explore novel situations.
Bodin suggested that the behavioral changes could have ecological consequences. For instance, hungry, drug-dosed fish might deplete algae-eating plankton, which could in turn cause algal blooms. On the other hand, an asocial, highly active fish might be at increased risk of being eaten.
But Skelly cautioned against going too far predicting ecological effects. “Just because you saw these changes, you can’t say very much about how it’s going to pan out in the field,” he says. In the wild, the very presence of predators might change the fish’s behavior, he noted. Oxazepam might also interact with a cocktail of other drugs that had made it into the water.
Still, Brodin said, the results are an indication of the effects benzodiazepines and many other psychoactive drugs could be having on a whole range of animals. “It’s very probable that these behavioral changes are going on in aquatic species around the world as we speak,” he said.
“It’s definitely an interesting study,” said David Skelly, an ecologist at Yale University who was not involved in the research. “It’s joining a group of exposure studies that are showing very clearly that the individual chemicals that are showing up as environmental contaminants are ecologically relevant.”
Previously researchers have raised concerns about all manner of pharmaceuticals in the water, from estrogens suggested to cause reproductive abnormalities in frogs to psychoactive drugs linked to autism in fish. Oxazepam is a type of benzodiazepine, drugs that work by binding to GABA receptors and are used to treat anxiety. Since many animals have these receptors, it stands to reason that benzodiazepines might influence animal behavior, Brodin said, but they “weren’t being studied [in animals] in environmentally relevant quantities.”
Testing effluent from a sewage treatment plant in Sweden and downstream water from the River Fyris, environmental scientist Tomas Brodin of UmeĆ„ University and colleagues found 0.58 micrograms of oxazepam per liter in the river and 0.73 micrograms per liter in the treated wastewater—concentrations consistent with previously reported levels of benzodiazepine drugs in other parts of the world.
The researchers then took European perch raised in clean water and put them in water with either a low dose of 1.8 micrograms of oxazepam per liter, or a high dose of 910 micrograms per liter. By the end of the 7-day treatment, the fish on the lower drug dose had accumulated levels of oxazepam in their tissues similar to those found in wild perch in the River Fyris.
Following exposure to the medicated water at either the high or low dose, fish spent more time swimming around their tanks. When the scientists put zooplankton in water, the exposed fish found and ate them more rapidly than the control fish, but showed low interest in other fish. The researchers also found that fish treated with the high dose of the drug scored higher on tests of boldness, or their willingness to explore novel situations.
Bodin suggested that the behavioral changes could have ecological consequences. For instance, hungry, drug-dosed fish might deplete algae-eating plankton, which could in turn cause algal blooms. On the other hand, an asocial, highly active fish might be at increased risk of being eaten.
But Skelly cautioned against going too far predicting ecological effects. “Just because you saw these changes, you can’t say very much about how it’s going to pan out in the field,” he says. In the wild, the very presence of predators might change the fish’s behavior, he noted. Oxazepam might also interact with a cocktail of other drugs that had made it into the water.
Still, Brodin said, the results are an indication of the effects benzodiazepines and many other psychoactive drugs could be having on a whole range of animals. “It’s very probable that these behavioral changes are going on in aquatic species around the world as we speak,” he said.
Thursday, 23 August 2012
INSECT SOAK UP THE SUN
Aphids are one of the most unique organisms in the animal kingdom. In
addition to being among the most destructive pets, some aphid species
are the only animals known to produce carotenoids–light absorbing
pigments that form part of the photosynthetic machinery of plants,
algae, and certain fungi.
Now, an international group of researchers led by entomologist Alain Robichon from the Sophia Institute in France, have proposed that carotenoid-producing aphids can actually use the pigment in a photosynthetic-like process to produce ATP–the cellular energy molecule.
But whether the insects can use the power of light to ultimately synthesize glucose and other compounds is far from clear, Yale University geneticist Nancy Moran, who was not involved in the study, told Nature. “Energy production seems to be the least of an aphid’s problems–their diet is loaded with excessive sugar, most of which they cannot use,” she said. However, the authors counter that aphids may use the process as an energy back-up during times of stress, Nature reported.
Now, an international group of researchers led by entomologist Alain Robichon from the Sophia Institute in France, have proposed that carotenoid-producing aphids can actually use the pigment in a photosynthetic-like process to produce ATP–the cellular energy molecule.
But whether the insects can use the power of light to ultimately synthesize glucose and other compounds is far from clear, Yale University geneticist Nancy Moran, who was not involved in the study, told Nature. “Energy production seems to be the least of an aphid’s problems–their diet is loaded with excessive sugar, most of which they cannot use,” she said. However, the authors counter that aphids may use the process as an energy back-up during times of stress, Nature reported.
Tuesday, 14 February 2012
Saturday, 10 December 2011
UNDERGROND HELL IN RUSSIA
place or symbolical? Bible talks about hell several times. But I would like to share you this true to life experience of scientist named Dr. Azzacove from Russia who doesnt believe in God, in bible and hell. This news appeared in the well respected Finland newspaper, Ammenusastia.
Heres what happened, a group of geological scientist was drilling a 14.4 kilometers hole deep in Siberia, … then after using their super sensitive microphones to test the underground for sound intervals, they shocked on what they heard. First they heard a high pitched sound, they thought the sound was from their digging devices. After some adjustments: They heard a terrifying screams…, not just screams of a single human, but screams of millions human voice, a screams of pain.
Dr. Azzavoc the project manager of the scientist says. Aside from the screams they heard they were also surprised on a very high temperature around 1,100 degrees celsius. They are afraid to continue the project, and about half of the scientist quit because of fear.
Dr. Azzavoc is a communist, doesnt believe on God, and bible.. But after this event. He believes now that Hell really exist!. If you want to download the hell screaming sounds in mp3 format… click here. You may put that mp3 file in your cellphones, ipods so you can share this to other.
Heres what happened, a group of geological scientist was drilling a 14.4 kilometers hole deep in Siberia, … then after using their super sensitive microphones to test the underground for sound intervals, they shocked on what they heard. First they heard a high pitched sound, they thought the sound was from their digging devices. After some adjustments: They heard a terrifying screams…, not just screams of a single human, but screams of millions human voice, a screams of pain.
Dr. Azzavoc the project manager of the scientist says. Aside from the screams they heard they were also surprised on a very high temperature around 1,100 degrees celsius. They are afraid to continue the project, and about half of the scientist quit because of fear.
Dr. Azzavoc is a communist, doesnt believe on God, and bible.. But after this event. He believes now that Hell really exist!. If you want to download the hell screaming sounds in mp3 format… click here. You may put that mp3 file in your cellphones, ipods so you can share this to other.
NEW DISCOVERY BY SALAMI TAIWO
1) The tooth is the only part of the human body that cant repair itself.
2) In an average adult the volume of blood is one eleventh of the body weight, or between 5 and 6 quarts.
3) The feet account for one quarter of all the human bodies bones.That is 52 bones in the feet alone.
4) The first toy balloon,made of vulcanized rubber, was thought of by someone in the J.G Ingram company in London,England in 1847.
5) A cough releases an explosive charge of air that moves at speeds up to 60 mph.
6) Do not cut or push back your toenail cuticles,Cuticles protect you against bacterial infection.
7) Saturn rings are about 500,000 miles in circumference but only about a foot thick.
2) In an average adult the volume of blood is one eleventh of the body weight, or between 5 and 6 quarts.
3) The feet account for one quarter of all the human bodies bones.That is 52 bones in the feet alone.
4) The first toy balloon,made of vulcanized rubber, was thought of by someone in the J.G Ingram company in London,England in 1847.
5) A cough releases an explosive charge of air that moves at speeds up to 60 mph.
6) Do not cut or push back your toenail cuticles,Cuticles protect you against bacterial infection.
7) Saturn rings are about 500,000 miles in circumference but only about a foot thick.
Friday, 18 November 2011
WHY WE YAWN
Yawning, which opens the sinuses located to the left and right of the nose, acts to cool the brain when it gets too hot.
Excessive yawning, argue the researchers, appears to be a symptom of conditions that increase the brain or core temperature, such as damage to the central nervous. In addition, fits of yawning often precede epileptic seizures and migraines. Therefore, the authors say, understanding the physiological purpose of the reflex could have medical relevance.
Earlier work by the authors showed that the brains of mice increased in temperature just before a yawn and decreased directly after. The authors propose that the mucus within the sinus constantly evaporates and, like a refrigerator, cools the surrounding blood vessels and cerebrospinal fluid. A yawn, they suggest, would amplify this process by stretching the jaw, which flexes the walls of the sinus bringing new air into it rapidly cooling an overheated brain.
Excessive yawning, argue the researchers, appears to be a symptom of conditions that increase the brain or core temperature, such as damage to the central nervous. In addition, fits of yawning often precede epileptic seizures and migraines. Therefore, the authors say, understanding the physiological purpose of the reflex could have medical relevance.
Earlier work by the authors showed that the brains of mice increased in temperature just before a yawn and decreased directly after. The authors propose that the mucus within the sinus constantly evaporates and, like a refrigerator, cools the surrounding blood vessels and cerebrospinal fluid. A yawn, they suggest, would amplify this process by stretching the jaw, which flexes the walls of the sinus bringing new air into it rapidly cooling an overheated brain.
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