Tag: "pairs" at biology news

Evolution of typhoid bacteria

...stigated the sequence diversity within 90,000 base pairs per strain. Eighty-eight informative sequence differences were detected, showing that the population structure has evolved over the last 10,000 to 43,000 years. Amazingly, the ancestral strain continues to exist today, as do many of its direct descen...

NHGRI funds large-scale sequencing centers

...ogies, is expected to be about 12 billion DNA base pairs per month the equivalent of four human genomes. A significant portion of NHGRI's medical sequencing program will be used for The Cancer Genome Atlas (TCGA), which was launched in December 2005 as a $100 million, collaborative three-year pilot pr...

Ritualized submission and pseudo-copulation reduce aggression among male crayfish

...ubordinate male, who either accepts or refuses. In pairs that pseudo-copulated, initial aggressive interact...vived over the first 24 hours. However, in male pairs that did not pseudo-copulate, similar initial levels of aggression were maintained over the first ho...

Chemical exchanges show wasps are bad losers

...The scientists staged 47 separate contests between pairs of female wasps, placing them in a transparent chamber with a larva, which in the wild they paralyse to use as a host to lay their eggs on. One 'owner' female had paralysed the host 24 hours before the other wasp was allowed to intrude. Making ne...

Critical pairing

...ne bases adenine (A) and guanine (G) form specific pairs with the pyrimidine bases thymine (T) and cytosine...eed obtain molecules that could form specific base pairs not only with each other, but also with complementary RNA and DNA strands. Interestingly, only one s...

UCLA researchers unravel a mystery about DNA

...gy between -- and hence the distance separating -- pairs of fluorescent chemical tags attached to key structural elements of RNAP and the DNA double helix during initiation of the transcription process. The changes in the distances between these tags confirmed that transcription proceeds initially throu...

Nanotech tools yield DNA transcription breakthrough

...luorescence spectroscopy. The researchers attached pairs of fluorescent "tags" to key structural elements of the machine and then monitored changes in distance between tags in single molecules as transcription occurred. The researchers showed that, during initial transcription, the machine does not move to...

Genetic study of Neanderthal DNA reveals early split between humans and Neanderthals

... from Vindija, Croatia. They recovered 65,250 base pairs of the Neanderthal's 3 billion total base pairs and utilized traditional sequencing technologies used for the Human Genome Project as well as the ne...

Neanderthal genome sequencing yields surprising results and opens a new door to future studies

...hey used to characterize more than 65,000 DNA base pairs of Neanderthal origin. Their results not only prov...ancestors through the scanning of billions of base pairs of DNA sequences available on the web rather than only being able to study the limited number of bon...

454 Life Sciences and Max Planck publish sequence of one million base pairs

...l Nature, is titled: "Analysis of one million base pairs of Neandertal DNA". "Direct high-throughput 454 ...Neandertal genome, including over one million base pairs of hominoid nuclear DNA sequences, giving us the confidence to commence with the sequencing of the e...

Selecting life: Scientists find new way to search for origin of life

... of life." Like amino acids, some minerals have pairs of crystal surfaces that have a mirror relationshi...zen and coworkers have identified molecule/surface pairs of interest with the DNA microarray and ToF-SIMS, an arsenal of other techniques can be used to look...

A prickly subject: The sea urchin genome is sequenced

...f the scientists who helped decode the 814 million pairs of nucleotide bases in the sea urchin's chromosomes. The Human Genome Sequencing Center at Baylor College of Medicine in Texas led the project and announced the completion of the three-year project today. Having the complete genome, Coffman says, "...

The LouseBuster kills

...ious two weeks. Clayton dispatched his students in pairs to the homes of infested children to test the various methods. After completion of each treatment trial, each participant was paid $10 and given conventional treatments for lice. Some 94 percent of the children were girls, who are more like...

Group decisions: From compromise to leadership in pigeon homing

...S tracking devices to follow the homing flights of pairs of pigeons, where both individuals had their own, ...sis of pigeon behavior showed that birds flying in pairs seem to take more efficient routes home than those flying alone, suggesting that in addition to safe...

Floating lovers count too -- in the health of eagle populations

...dalberti over the last century. With less than 150 pairs in the whole Iberian Peninsula, this eagle is one of the most threatened raptors in the world. They found that extremely high mortalities of floaters in settlement areas cause a decrease in the number of breeders, due to the increasing difficulty of...

Fathers influence child language development more than mothers

...UNC's School of Education. Researchers videotaped pairs of parents and their 2-year-old children in their homes during playtime. The children whose fathers used more diverse vocabularies had greater language development when they were tested one year later. However, the mothers' vocabulary did not signifi...

American research finds twins more likely to have premature menopause

...nceived. Subsequently, several more identical twin pairs came forward for possible treatment and the resear...ned Dr Gosden. They analysed data from 428 twin pairs on the Australian twin register and 404 on the UK twin register who had undergone a natural menopaus...

USGS presents a world of science at GSA in Philadelphia

...Change in Pictures: The author will compare photo pairs of sites in southern Alaska showing spectacular sc...nge, with imagery dating as far back as 1880. The pairs show that glacial retreat rapidly transforms the landscape. Bruce F. Molnia, PCC Auditorium Lecture...

A ruler of gold and DNA

... particle's spidery DNA strands, which are 54 base pairs long, are shortened for whatever reason, then the ...oparticle roughly 100 DNA strands that are 54 base pairs long. But among these base pairs they inserted a sequence of six base pairs that are specially tailo...

Childcare tug-of-war influences shorebird breeding systems

...er is particularly interesting because whilst some pairs are monogamous, in other pairs either the male or female can be sequentially polygamous, mating several different times throughout ...

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(Date:4/23/2014)... contribute to early fetal death according to a new ... Children,s Hospital Los Angeles and Ulaanbaatar, Mongolia the ... paper published today in the journal BMC Pregnancy ... between seasonal ambient air pollutants and pregnancy loss in ... the highest levels of air pollution of all world ...
(Date:4/23/2014)... Like a hungry diner ripping open a dinner roll, ... must tear open a hydrogen molecule. Now researchers have ... the two halves of its hydrogen feast. The view ... make the catalyst work better for alternative energy uses. ... shown precisely where the hydrogen halves end up in ...
(Date:4/23/2014)... research shows that male black widow spiders prefer their ... example of mate preference by male spiders. ... and Maydianne Andrade, a professor in UTSC,s Department of ... the wild that males overwhelmingly chose to mate with ... can tell whether a potential mate is well-fed and ...
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