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Tag: "size" at biology news

Chemists create 'Superbowl' molecule; May lead to better health

...hich acknowledged this and recognized their larger size and shape," says Sherburn. "'Superbowl' was perfect since it conjures up ?for me at least ?the image of a sports stadium, which the molecules are similar to in shape." Appropriately, the researcher is also a football fan and watches the Super Bowl e...

Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants

...anconventional fluorescent markers and their small size make them idealfor biological imaging. The researchers then added the molecules togerminated lily pollen grains and examined them under a confocalmicroscope.This is the very first time that Quantum Dots have been utilized forlive imaging in plant sys...

University of Manchester makes made-to-measure skin and bones a reality using inkjet printers

... tissues and have limited control over theshape or size the tissue will grow to. It also allows more than ...ve way in which they are able to pre-determine the size andshape of the tissue or bone grown.Using the printers, they are able create 3-dimensional structur...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

...p? The researchers found no difference in pancreas size or numbers of pancreatic beta cells, which produce insulin. But cultures of the beta cells revealed the answer: the undernourished mice had an abnormal way of responding to glucose. "They were somehow 'programmed' to secrete a limited amount of insu...

Termites feed through good vibrations

...s show two responses by the termites: one to block size and a second to signal source. The artificial sign...mall block with the artificial signal was the same size as a large block; thus no preference was observed. However, the signal from the termites feeding on ...

Mouse brain cells rapidly recover after Alzheimer's plaques are cleared

...e were 20 to 25percent reductions in the number or size of the existing swellings."The nerve cells' rapid ability to regain normal structure has Holtzmanand Brendza wondering if the nerve cells are constantly trying torestore their normal structure. If so, that recuperative effort mustsomehow be countered...

Key molecule in plant photo-protection identified

...e were 20 to 25percent reductions in the number or size of the existing swellings."The nerve cells' rapid ability to regain normal structure has Holtzmanand Brendza wondering if the nerve cells are constantly trying torestore their normal structure. If so, that recuperative effort mustsomehow be countered...

Plants, animals share molecular growth mechanisms

...e growth of the whole plant and also the shape and size of types of cells in the plant." Results of the s...exist on most cells. They found that the shape and size of these hairs, or trichomes, readily show when genes affecting actin filaments are askew and causin...

The secret to longevity in tubeworms

...he vents do not match the observed tubeworm colony size and individual longevity, leading Cordes et al. to propose that L. luymesi also uses its roots to release sulfate back to the microbial consortia from which it draws its sulfide. Without this return of sulfate, the model predicts an average lifespan ...

Inexpensive, mass-produced genes core of synthetic biology advances at UH

...ification (mutations, deletions, etc). Devices the size of a pager now have greater capabilities thancomputers that once occupied an entire room. Similar advances are beingmade in the emerging field of synthetic biology at the University ofHouston, now allowing researchers to inexpensively program the che...

New Technique for Tracking Gene Regulators

...heir compliments on microarrays, are limited bythe size of genome they can analyze.Dunn’s team has come up with a technique to determine the positions ofthese 500-to-1,500-base-long pieces on an entire genome ?even one aslarge as the human genome ?relatively quickly and in very largenumbers.After isolatin...

Finding Cures For Tropical Diseases: Is Open Source An Answer?

...asible. "Thedifference today is the vastly greater size and variety of chemical,biological, and medical databases; new software; and more powerfulcomputers. Researchers can now identify promising protein targets andsmall sets of chemicals using computation alone."...

The secret lives of whales

... their genetic variation ?an indicator of the past size of their population. Piecing together their ancient family trees, he has discovered that the Antarctic population of minke whales is now the longest surviving whale population on earth. It was also once the largest—many times larger than other estima...

Color-blind method opens new doors in DNA sequencing

...ion (PCR) steps, reduce its length to a manageable size of thousands of nucleotides. Using natural replicating enzymes, the DNA is tagged with four fluorescent dyes, each corresponding to a particular nucleotide. This tagging process, called Sanger sequencing, results in smaller DNA fragments, which are t...

Mouse brain tumors mimic those in human genetic disorder

...ergo treatment for the tumor,including the tumor's size and the patient's clinical symptoms. Butoften those tests aren't sufficiently informative, so experts alsoexamine pictures of the patient's brain taken with magnetic resonanceimaging (MRI). To capture such brain images, physicians inject acontrast dy...

Solution to Pollution: New Bacteria Eats Toxic Waste

...e five isolates. They answered questions about the size of their chromosome and whether plasmids were present in the mycobacterium. “Putting together genomes tells us a lot about the history of the world and may even help us with its future,?said Joanne Hughes, a Utah State Biology professor. The Departm...

Taking Aim With Nanoparticle PEBBLEs

...pically 20 to 200 nanometers in diameter—about the size of a virus. The spheres carry an assortment of molecules on their surfaces, some to guide the PEBBLEs to their targets inside the body, some to enhance their visibility on MRI images, and others to deliver a deadly cargo to cancer cells when triggere...

Open microfluidic and nanofluidic systems

...al and biochemical laboratories shrunk down to the size of a computer chip. An essential prerequisite for such labs are appropriate microcompartments for the confinement of very small amounts of liquids and chemical reagents. Directly accessible surface channels, which can be fabricated by available photo...

Study shows nanoshells ideal as chemical nanosensors

...otein to a deadly chemical agent."About 1/20th the size of a red blood cell, nanoshells are about thesize of a virus. They are ball-shaped and consist of a core ofnon-conducting glass that is covered by a metallic shell, typicallyeither gold or silver. The metal shell "captures" passing light andfocuses i...

Researchers trace evolution to relatively simple genetic changes

...Kingsley said. For example, "sticklebacks vary in size and color, reproductive behavior, in skeletal morphology, in jaws and teeth, in the ability to tolerate salt and different temperatures at different latitudes," he said. Kingsley, Schluter and their co-workers picked one trait -- the fish's armor pl...

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