Tag: "identical" at biology news

Nurtured chimps rake it in

...rchers then presented the same two groups with two identical ‘hybrid’ rakes. Each rake head had a rigid side made of wood (functional) and another side made of flimsy cloth (non-functional). The reward was placed in front of the rigid side of one rake, and in front of the flimsy side of the second rake. The...

Chronic fatigue syndrome impairs a person's slow wave activity during sleep

...the University of Michigan, focused on 13 pairs of identical twins discordant for CFS. Analyses, which were restricted to the first four non-REM periods each night in order to show comparability, revealed that SWA, or other sleep EEG measures, did not differ between the CFS and healthy twins during a regular ...

Latent memory of cells comes to life

...fact in all of us as our body develops: cells with identical genetic information adopt very different fates, fo...ght into the mechanisms by which living cells with identical DNA can achieve extreme differentiation. The research at the ‘Models of Life?Basic Research Cente...

Using nanomagnets to enhance medical imaging

...drogen in water, offer the advantage of consistent identical design but provide low contrast. The second category encompasses particles of thousands of atoms or crystals, which alter local magnetic fields; they provide contrast variation in a larger region but have irregular designs and magnetic properties tha...

In obesity, brain becomes 'unaware' of fat

...asons that remain unclear, some of the genetically identical mice became obese when fed such a diet, while others did not. “On a high-fat diet, not all of the animals become fat,?Cowley said. “About 60 percent become fat, while others on the same diet, same calories, don’t gain weight, and leptin levels rem...

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...en alpha I. The majority of these were found to be identical matches to amino acid sequences found in chicken collagen alpha I, while others matched newt and frog. For extinct species, the real goal is to find sequences unique to that organism. Asara generated a set of theoretical collagen protein sequences...

Trusting your instincts leads you to the right answer

...ck the odd one out on a screen covered in over 650 identical symbols, including one rotated version of the same symbol, actually performed better when they were given no time at all to linger on the symbols and so were forced to rely entirely on their subconscious. Dr Li Zhaoping, of the UCL Department of P...

Scientists discover stage at which an embryonic cell is fated to become a stem cell

...t the mammalian embryo starts its development with identical cells and only as these inside and outside cells form do differences between cells first emerge. However, research led by Professor Magdelena Zernicka-Goetz, University of Cambridge, has revealed evidence to suggest that differences between the em...

Protein overexpression at heart of heart failure

...ar L-VDCC, rendering these channels phenotypically identical to human and mouse heart failure. The authors conclude that electrical remodeling of the L-VDCC, based on gene expression changes, is an early step in a cascade ultimately induced in heart failure. This provides a rational framework for novel ther...

Mummy's amazing American maize

...modern samples of the crop were genetically almost identical indicating that modern European influence has not been as great as previously thought. "The entire culture of South America changed when the Europeans arrived in the 15th century ?everything from the language to the whole way of life," explained P...

New sensor detects gaseous chemical weapon surrogates in 45 seconds

... a 3 x 3 millimeter chip. And the tuning forks are identical to the kind used in wristwatches, measuring only 4 millimeters long, 2 millimeters wide and 0.3 millimeter thick. A conceptual design for a battery-operated, prototype QPAS sensor, which includes 10 pairs of QCLs and tuning forks, would fit into a br...

New research may overturn conventional wisdom on drug-resistant tuberculosis

...etic patterns and only 16 percent (5 patients) had identical patterns. Thus, there were more than 5 times as many cases caused by re-infection compared to mutation. "It was surprising to find a high rate of primary drug-resistant strains among treated patients," said Dr.Gao. "This overturned the common beli...

Scientists identify a gene that may suppress colorectal cancer

...sts have turned to mouse models, which have nearly identical genetic backgrounds and are housed in controlled conditions. The scientists used a strain of mice called Min (multiple intestinal neoplasia). Min mice carry mutations in the Apc gene, which causes the development of intestinal tumors. Inactiva...

Making mice with enhanced color vision

...that was twice as bright as a red light would look identical to the red one. But if the animal adds a second photoreceptor with different absorption properties, then by comparing both receptors, the red and green lights could always be distinguished." Normal mice failed to discriminate yellow versus red l...

Bacteria from patient's dental plaque causes ventilator-associated pneumonia

...l samples of the nine patients with pneumonia were identical to profiles of bacteria from their dental plaque. "These results suggest that the teeth likely serve as an important reservoir of infection in these patients," said Heo. "To prevent opportunistic, hospital-acquired disease, taking care of teeth a...

Volcanic eruptions, ancient global warming linked

...olcanic eruptions. Using chemical fingerprints and identical ages, they were able to positively match ash layers in east Greenland with those in marine sediments in the Atlantic Ocean. "We think the first volcanic eruptions began about 61 million years ago and then it took another 5 million years for the ma...

Scientists reveal structure of gateways to gene control

...omes by matching the sequence of each one with the identical sequence on the previously published yeast genome. "Obtaining the exact DNA sequences for all these nucleosomes allows us to precisely map their positions across the entire genome," explains Schuster. The map reveals, for the first time, precisely ...

Virtual duck bills demonstrate species coexistence

...rent species manage to coexist. If two species use identical resources, such as food, invariably one will be more efficient and out-compete the other. The classical explanation is that each species has evolved morphological or physiological traits that allow it to exploit some resources more efficiently than a...

Cloned mice created from fully differentiated cells, a milestone in cloning research

...e entire genome of the donor somatic cell it is an identical copy. This cloned embryo is then implanted into a ...ones because they possess chromosomes that are not identical to those of the original donor nucleus. Since Dolly, animal cloning using adult cells has been acc...

Early-stage immune system control of HIV may depend on inherited factors

...plants, with perfect matches only possible between identical twins. Some studies have found that HIV patients with particular versions of HLA may be better able to control viral levels, but the diversity of HLA molecules ?each person may have up to six different varieties of Class I proteins ?has made investi...

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