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Tag: "units" at biology news

Ecology in an era of globalization

...uding "Ecological impacts of wildlife conservation units policy in Mexico," "Timber production in selectively logged tropical forests in South America," "Assessing invasive alien species across multiple spatial scales: working globally and locally," and "Cascading events in linked ecological and socioecon...

Fascinating spider silk

...the second consisted of oligomers—multiple protein units linked together. After the addition of potassium phosphate, a natural initiator of silk aggregation, the liquid could be pulled into threads. "It is clearly not a structural change in the protein, but rather the degree of oligomerization that is cruc...

Better assessment of transfusions could save blood

...nt of patients admitted to hospital intensive care units are affected by anemia. Consequently, these patients receive a large number of red blood cell (RBC) transfusions in order to restore proper hemoglobin levels. New research shows that alternative treatments may lead to fewer transfusions, conserving c...

When your brain talks, your muscles don't always listen

...ctrode was repositioned to sample from other motor units within the muscle. Knight and graduate student Dhiraj Poojari and undergraduate researchers Maria Bellumori and Christopher Martens then analyzed the firing-rate data for frequency and amplitude in a tedious process that Knight hopes to automate i...

Secret of worm's poison pill box protein could produce new natural insecticide

...s, found that the protein was formed from four sub units in the shape of a hollow cage or box which is configured to bind well to part of a caterpillar’s gut called "Brush Border Membrane Vesicles" (BBMV). The XptA1 protein seemed to specifically target the BBMV of caterpillars Pieris Brassicae ?(The ...

Scientists map key landmarks in human genome

...ant melanoma. Nucleosomes are spherical packing units for DNA. They consist of a length of DNA wrapped around a core, like ribbon around a spool that is made up of proteins called histones, and the nucleosomes are located along the chromosomes like beads on a string. Nucleosomes have multiple functio...

Stem cells decrease ischemic injury and restore brain function

...ic patients (early diagnosis, thrombolysis, stroke units and rehabilitation centers), stroke still represents a major and unresolved medical issue. "Stroke causes the death of many nervous cells that, in theory, could be substituted by stem cells. A few studies have shown that these cells can be effect...

Fruit fly gene research may shed light on human disease processes

...s a single DNA molecule that may contain different units of inheritance called genes, along with proteins that help to activate these genes under certain conditions. Even though it is the presence or absence of the human Y chromosome that directs sex development, human females still need to determine h...

End-of-life care can be improved

...ovements in the end-of-life care in intensive care units (ICU) and have shared their findings in a special supplement to Critical Care Medicine, the journal of the Society of Critical Care Medicine. The supplement is dedicated entirely to end-of-life care in the critical care setting. "Improving the quali...

Mutant gene causes severe kidney disease in infants

...t. There are about one million of these filtration units in each human kidney. As blood flows through a net...ined in the bloodstream. If the kidney's filtering units don't work properly, nephrotic syndrome develops. Proteins leaking out from the glomerulus are excre...

Bones at the nanoscale

...breaking, de-spite being made of essentially rigid units at the molecular level. The re-sults are published this week in the PNAS online edition. A bone is made up of two different elements: half of it is a stretchable fibrous protein called collagen and the other half a brittle mineral phase called apati...

Compound eyes, evolutionary ties

...) allows the formation of distinct light gathering units in each of its 800 unit eyes, an evolutionary chan...and many mosquito species have the light-gathering units fused together into a "closed system." In a paper published in this week's early online edition of ...

New technique boosts size of proteins that can be analyzed

...oken down, or digested, enzymatically into smaller units of five to 20 amino acids. These pieces are then introduced into the mass spectrometer where researchers can match masses of those pieces to known sequences and identify the proteins. However, this approach reveals less information concerning modif...

Researchers identify new weapon to fight deadly bacterial sepsis

...e and death. Even the best hospital intensive care units may be helpless to save patients stricken by severe sepsis. According to a 2003 study by Emory University and the Centers for Disease Control and Prevention, sepsis killed 120,491 hospitalized people in 2000. The same study found cases of sepsis in t...

Carnegie Mellon scientists use 'green' approach to transform plastics manufacturing

...ing a special catalyst to add one or a few monomer units at a time to a growing polymer chain. ATRP requires a balance between two species of copper (Cu) catalyst, CuI and CuII. But as an ATRP reaction progresses, CuII builds up. Typically, researchers add more CuI to compensate for this effect and maintai...

Gene chip technology shows potential for identifying life-threatening blood infection

...ch a test could not only be used in intensive care units but also in emergency rooms and other settings where a timely diagnosis of infection is important, adds Cobb, who is also professor of surgery and associate professor of genetics. His team's research was published in the November issue of the Journal...

Very low birth weight linked to reduced quality of life in pre-school children

...ication. Longer stays in neonatal intensive care units were also linked to reduced social function. The r... and were cared for in the neonatal intensive care units of four hospitals in northern Taiwan. The survival rate for babies in this weight range is just over...

Singing for survival

...e humans, gibbons assemble a finite number of call units into more complex structures to convey different messages, and our data show that distant individuals are able to distinguish between different song types and understand what they mean. This study offers the first evidence of a functionally referent...

Detecting explosives with honeybees

...epellant. In addition, the team studied structural units in the honey bee's antenna and looked for biochemical and molecular mechanisms that could advance their ability to be trained and retain their training for longer periods of time. ...

'Smart' genetic therapy helps the body to heal itself

... can be manipulated in such a manner that certain units ('exons') are skipped. In this way, the readability of the code can be restored and the progress of DMD delayed or even stopped. In collaboration with the Dutch biotech company Prosensa BV, and supported by the national and international Duchenne ...

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