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Tag: "long" at biology news

Scientists succeed in cloning human embryos from eggs matured in the lab

...." However, Mr Heindryckx warned that there was a long way to go and many problems to overcome before he and his colleagues could reach their goal. "None of these early embryos developed to the blastocyst stage, and failure to do so could reveal some problems in gene activation, especially in cloned emb...

Understanding biases in epidemic models important when making public health predictions

...ry short infectious period while a few have a very long infectious period. In reality, most people are infectious for an average period of time. For the flu the average infectious period is around 4-5 days, with incredibly few people infectious for less than a couple of days or more than a week. "Models ...

Biologists determine genetic blueprint of social amoeba

...f Dictyostelium discoideum, a simple social amoeba long used by researchers as a model genetic system, much like fruit flies and laboratory mice, to gain a better understanding of human diseases. The scientific details of this seven-year-long genetic sequencing effort, which involved 97 scientists from 2...

Invitrogen Launches i-Path -- A Unique Systems Biology Platform at BIO 2005

...." However, Mr Heindryckx warned that there was a long way to go and many problems to overcome before he and his colleagues could reach their goal. "None of these early embryos developed to the blastocyst stage, and failure to do so could reveal some problems in gene activation, especially in cloned emb...

Inhaling large amounts of salt can cause hypertension

...ry short infectious period while a few have a very long infectious period. In reality, most people are infectious for an average period of time. For the flu the average infectious period is around 4-5 days, with incredibly few people infectious for less than a couple of days or more than a week. "Models ...

Researchers Discover That Microbes Can Produce Miniature Electrical Wires

..., but quite durable and more than a thousand times long as they are wide. “Such long, thin conductive structures are unprecedented in biology,?said Lovley. “This completely changes our concept of how microorganisms can handle electrons, and it also seems likely that microbial nanowires could be useful ma...

Field of beams - Novel system uses polarized light pulses to reveal crop health

...ry short infectious period while a few have a very long infectious period. In reality, most people are infectious for an average period of time. For the flu the average infectious period is around 4-5 days, with incredibly few people infectious for less than a couple of days or more than a week. "Models ...

Purdue scientists may have found key to halting spinal cord damage

...ty is well documented." For example, acrolein has long been known to cause cancer when its concentration ...initial shock, it actually gets worse. Science has long been aware that some chemicals the damaged cells release are part of the problem, but no one has eve...

Study: Harmless virus kills some cancers

...f AAV2, none allowed the AAV2 to remain in culture long enough to see the effect that Meyers and his team observed. "One of the most compelling findings is that AAV2 appears to have no pathologic effects on healthy cells," Meyers said. "So many cancer therapies are as poisonous to healthy cells as they a...

The genetic origins of corn on the cob

... acts by signaling cells to form short rather than long branches," says Martienssen, who was joined in the study by lead author Dr. Erik Vollbrecht, now at Iowa State University. Says Vollbrecht, "We solved this enduring puzzle by combining classical and modern molecular genetics. The former included our...

$6.5 Million Grant for Microarray Center at Yale School of Medicine

... acts by signaling cells to form short rather than long branches," says Martienssen, who was joined in the study by lead author Dr. Erik Vollbrecht, now at Iowa State University. Says Vollbrecht, "We solved this enduring puzzle by combining classical and modern molecular genetics. The former included our...

Scientists find microRNAs regulate plant development

...y microRNA molecules. MicroRNAs are ~22 nucleotide long RNA molecules that provide substrate specificity to a protein complex known as the RNA-induced silencing complex. Within the complex, microRNAs are thought to bind to mRNA molecules containing a complementary stretch of RNA sequence. The complex then...

Assessing the Amazon River's sensitivity to deforestation

...hat there simply aren't enough observations over a long enough time period for us to understand the River system. So this model, by letting us simulate the entire river through time, has helped us learn much about how the river flow and flooded area react to year-to-year variations in climate." Currently...

Can our genes tell the story of our divergence?

... evolutionary arms race - prove plausible. We're a long way from understanding why we're so different from our closest primate cousins, but this study provides plenty of tools, and hypotheses, to mine the tiny differences in our DNA for more clues. ### Citation: Nielsen R, Bustamante C, Clark AG, Glanow...

Neandertal femur suggests competition with hyenas and a shift in landscape use

...Neandertals to modern humans, anthropologists have long argued that major behavioral changes and major improvements in adaptation began to take shape with modern humans," said Erik Trinkaus, Ph.D., Mary Tileston Hemenway Professor of Anthropology at Washington University and co-author of the paper. "One ...

Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory

...r use in assisted conception treatments. This is a long way off and we would have to prove it was safe because, for example, the culture process may cause genetic changes. For some men and women this would be the only route for producing sperm and eggs. It would not be reproductive cloning as fertilisatio...

Bacteria use host's immune response to their competitive advantage

...waiting for a chance to infiltrate and infect. But long before these bacteria break through our immune defenses, they must first compete against other bacterial species to colonize the mucus-lined surfaces of our noses. Competition between two common nose bacteria involves some interesting trickery, acco...

Researchers feed tiny pills of RNA to planarians to identify genes essential for regeneration

...s-feeding microscopic pills of RNA to quarter-inch long worms called planarians-have identified many genes essential to understanding a biological mystery that has captivated scientists for hundreds of years: regeneration. In pinpointing the genes, the U School of Medicine researchers have established th...

Study shows how retinoic acid enters a cell's nucleus

...does not have a recognizable NLS. Researchers have long wondered how proteins without an NLS enter a cell'...es a mystery that has been in the literature for a long time," Noy says. "It explains a basic mechanism of how this protein, CRABP-II, gets into the nucleus...

Compound might defeat African sleeping sickness, clinical trial beginning this month

...s an infectious disease expert who retired after a long career with Abbott Laboratories. "We're trying to improve the lives of these patients by treating the disease early on in the local villages before it progresses to the terminal brain stage," the physician said. "When a drug works and helps a lot of...

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