Rupture in Biological News

Scripps studies offer new picture of Lake Tahoe's earthquake potential

... graduate student Danny Brothers investigated the rupture history of the West Tahoe Fault in greater ... of over 50 km (31 miles). When combined with the rupture offset size observed across the fault from CHIRP ... with a slip-rate approaching 0.8 mm/year and the rupture timeline taking place between 4,100 and 4,500 ...

Inflammation worsens danger due to atherosclerosis

... that inflammation increases the risk of plaque rupture in atherosclerosis. The related report by ... individuals. One potential cause of plaque rupture is the thinning of the collagen fiber cap ... of inflammatory cells in atherosclerotic plaque rupture using an animal model of atherosclerosis with ...

Describing soils: Calibration tool for teaching soil rupture resistance

... Resources and Life Sciences Education . rupture resistance is a measure of the strength of a soil ... In soil survey, during routine soil descriptions, rupture resistance is described for each horizon or layer in the soil profile. The current rupture resistance classes were developed from the ...

Protein's strength lies in h-bond cooperation

... of short beta strands in a structural protein rupture simultaneously rather than sequentially when ... four bonds. After observing the simultaneous rupture of these hydrogen-bond clusters within the ... entropic energy in the system and leads to the rupture of hydrogen bonds. By calculating the energy ...

Sticky protein helps reinforce fragile muscle membranes

... by scientists at the University of Iowa shows why muscle membranes don't rupture when healthy people exercise. The findings shed light on a mechanism ... GI tract and skin, are constantly under mechanical stress, which can rupture cell membranes," Campbell said. "Our findings support the idea that ...

Complications early in pregnancy or in previous pregnancies adversely affect existing or subsequent pregnancies

... nearly doubled the risk in an ongoing pregnancy of preterm premature rupture of the membrane that surrounds the baby in the womb, and increased the ... to be terminated for any reason, this increased the risk of premature rupture of the membrane, premature and very premature delivery in subsequent ...

Speed plays crucial role in breaking protein's H-bonds

... of atomistic interactions as their basisshow for the first time the basic rupture mechanisms of protein structures when protein strands unfold in response ... As a result, these earlier models predicted that the hydrogen bonds would rupture in response to pressures so small that proteins would be unstable. This ...

NIH awards UC $9 million grant to improve patient point-of-care technologies

... its meningitis, then a spinal tap is called for. However, if its an acute rupture of an artery in the brain, a CT scan is usually performed but is not ... to four hours. If the problem is a subarachnoid hemorrhage, its going to rupture again. But in doing the spinal tap, more blood might be introduced by the ...

August 2009 Geology and GSA Today media highlights

... more easily than is predicted based on measurements of rock strength. The cause of this mechanical weakness may be a key to understanding earthquake rupture processes and tsunami generation. The presence of trapped, pressurized fluids is one hypothesis widely invoked to explain these "weak faults," yet it ...

'Microfluidic palette' may paint clearer picture of biological processes

... to move in and out of the cells naturally and eliminates the risk of shear stresses, commonly produced by currents, which could cause the cells to rupture or behave abnormally. The NIST microfluidic palette manages this with a clever plumbing trick. The key element of the palette is the ...

Debate on admin. of magnesium sulfate to pregnant women to prevent cerebral palsy in pre-term infants

... magnesium sulfate should be considered for use in women at high risk of delivery before 34 weeks of gestation, mainly in those with premature rupture of membranes, labor in active phase, and planned delivery within 24 hours." They found persuasive evidence that administration of magnesium sulfate ...

Details of bacterial 'injection' system revealed

... structure that traverses the bacterial cell membrane and acts as a biological syringe to inject deadly proteins into intestinal cells. These proteins rupture the cell's innards, leading to bloody diarrhea and sometimes death. Similar secretion systems exist in a range of other infectious bacteria, ...

Men are the weaker sex

... more abundant. "Pregnancies with a male fetus are more often complicated," says Prof. Glezerman. "They're more likely to result in a premature rupture of the embryonic sac and suffer from premature delivery. And those male fetuses which make it to term," he continues, "are more likely to suffer from ...

Researchers win award for best clinical paper in orthopedic physical therapy

... topics in sports medicine-the management of anterior cruciate ligament (ACL) injuries. Each year, nearly 250,000 Americans, particularly athletes, rupture their ACL, which is one of the major ligaments of the knee. The authors included Wendy Hurd, a Ph.D. graduate of the UD Biomechanics and Movement ...

University of Miami biomedical engineer

... the arteries open to supply oxygen to the brain tissue. "Slowing down the blood flow within the aneurysm leads to natural clotting, which prevents rupture of the aneurysm and elicits a healthy scar-response from the body, thus restoring the diseased arterial segment to its normal state," explained ...

September 2007 Sumatran earthquakes research findings

... a magnitude 9.2 in December 2004, produced the most widespread and destructive tsunami in living memory. The cause of that calamity was the rupture of a 1600-km-long piece of the Sunda megathrust, a 6,000-km-long active fault that dives gently landward from the seafloor a couple hundred ...

Yale researchers unravel mystery of brain aneurysms

... and biochemical changes that cause this devastating brain disease, providing hope that we may also be able to provide preventive therapy before rupture occurs," Lifton said. For instance, the new findings implicate variations in the gene SOX17, which is known to play a crucial role in the early ...

Mitochondria could be a target for therapeutic strategy for Alzheimer's disease patients

... opening that leads to cell death for those with Alzheimer's. Mitochondrial permeability transition pore causes mitochondrial swelling, outer membrane rupture and release of cell death mediators and enhances production of reactive oxygen species (ROS). Cyclophilin D (CypD), a type of enzyme called a prolyl ...

The role of stem cells in renewing the cornea

... the limbus between them into a kind of equilibrium zone. Due to the constant expansion, stem cells accumulate in this zone. In the event of a rupture in the equilibrium, such as a large corneal injury, these limbal stem cells migrate into the cornea and conjunctiva and differentiate into the ...

LIAI launches new division to look at novel approaches to heart disease and inflammation

... disease," said Ley. Further study found that inflammatory T cells not only contributed to plaque formation, but they also played a key role in the rupture of the artery wall, which produces a heart attack. It is this aspect of the inflammatory process that draws Ley's primary attention. He focuses ...

Recurrence of group B strep high in subsequent pregnancies, say UT Houston obstetricians

... and sepsis, pneumonia or meningitis. Some of the symptoms that increase a woman's risk of passing GBS to her baby include: labor before 37 weeks, rupture of her amniotic membrane 18 hours or more before delivery, fever during labor, a urinary tract infection as a result of GBS during pregnancy and a ...

Ante-partum bed rest moms get active in Case Western Reserve University study

... own health care. Nearly 1 million pregnant women annually are sent to bed near the end of their pregnancies to prevent preterm labor, premature rupture of membranes, placenta previa, incompetent cervix or placental abruption. According to Maloni, many women leave the hospital and cannot ...

LSUHSC awarded $10M+ COBRE grant

... diabetes, and sepsis. Dr. Bazan's project is designed to fill major gaps in our knowledge regarding the process of carotid plaque instability and rupture resulting in stroke. "In the state of Louisiana, the incidence rate for cardiovascular disease is disproportionately high, particularly for ...

USGS science picks -- leads, feeds and story seeds

... . Paper copies of the narrative are available by request. High-resolution images and a computer animation showing the scenario earthquake rupture and the waves of energy spreading across Southern California are online at http://urbanearth.usgs.gov/shakeout . For more information, contact ...

Lab in a drop

... to isolate 30 cells implanted with the genetic information for a green-fluorescing protein from 25 L of blood, concentrate them 100-fold, wash them, rupture them, and detect the gene for the green protein by real-time PCRall within just 17 minutes! ...

AGU Journal Highlights -- March 19, 2008

... deformations from the initial aseismic deformations. They study the 2003 Tokachi-Oki event, where the ground signal was further complicated by the rupture of a large aftershock (magnitude 7.4) about an hour after the main shock (magnitude 8). By reducing GPS noise, the authors estimate the displacements ...

Genetic differences in clover make one type toxic

... explores the lurid possibility of plant suicide. In hypothesis two, we question the role of frequent frosts. The frosts could cause cell rupture and the release of cyanide leading to autotoxicity. If cyanogenic plants are poisoning themselves in cold climates, then those plants will be at a ...

October Geology and GSA Today media highlights

... deposits around ancient faults. Sheldon and Micklethwaite explain these relationships in terms of "damage," or cracking, that occurs after a fault rupture event or earthquake. Damage creates pathways that allow fluid to pass through the rock, transporting and depositing gold and other minerals. The ...

AGU journal highlights -- Sept. 6, 2007

... 5. A universal rule for the timing of repeating earthquakes? In some seismic settings, groups of events rupture at the same patch of fault repeatedly with nearly identical seismic signatures. These repeating sequences are suggestive of a renewal process taking ...

In mice, drug protects against diabetes and atherosclerosis

... encourage macrophages to load up on cholesterol and become "foam cells" that adhere to artery walls, creating dangerous plaques that eventually may rupture and trigger a heart attack. In mice lacking these lipid chaperones, there was no sign of heart disease. Next, the researchers turned to humans. ...

Now, self-healing materials can mimic human skin, healing again and again

... of a microencapsulated healing agent and a catalyst distributed throughout a composite matrix. When the material cracked, microcapsules would rupture and release healing agent. The healing agent then reacted with the embedded catalyst to repair the damage. “With repeated damage in the same ...

New research shows that flu is a trigger of heart attacks

... However, in some patients the quiescent, stable atherosclerotic plaques undergo sudden changes, mainly due to exaggerated inflammation, leading to rupture of these vulnerable plaques and subsequent formation of clots resulting in heart attacks. "This study shows that flu is an important trigger of ...

Common blood test can help distinguish between mononucleosis and tonsillitis

... "The importance in differentiating patients with tonsillitis from those with glandular fever [mononucleosis] is the prevention of spontaneous rupture of the spleen and acute intra-abdominal hemorrhage," potential complications of mononucleosis, the authors write. Currently, distinguishing between ...

Light wine intake is associated with longer life expectancy in men

... health benefit because the polyphenolic compounds contained in wine have been seen in animal to interfere with the formation, progression and rupture of atherosclerotic plaques ?the build-up of fatty tissue in the arteries that can result in stroke or heart attack. "Those people who already ...

Temple University Hospital investigates treatment for cervical dysplasia

... it may cause complications related to fertility and childbirth, such as cervical stenosis, pre-term delivery, low birthweight babies, and premature rupture of membranes." Approximately 20 million people, mostly women, are currently infected with HPV, with 6.2 million new infections occurring ...

PET imaging shows young smokers quick benefit of quitting

... endothelium—the innermost layer of the artery—and over time, plaques can narrow coronary arteries, allowing less blood to flow to the heart muscle. rupture of these plaques may result in a stroke, heart attack and death. It's generally known that the risk of death from coronary artery disease is up ...

Cincinnati surgeons report new treatment for often-fatal injury

... usually a non-penetrating "deceleration" injury, can jerk the aorta forward and back again, causing it to crack. If all three layers of the aorta rupture immediately, the patient will die almost instantly from blood loss. If the outer layer remains intact, however, a weakened area called a ...

New 'self-exploding' microcapsules could take sting out of drug delivery

... injection followed by a series of boosters, for instance, certain vaccines could be given in a single shot with the "booster" microcapsules timed to rupture at appropriate intervals. ...

A whole lot of shaking goin' on triggers early hatching in red-eyed tree frogs

... tears a few eggs from the clutch. With that bite, the embryos start to wiggle frantically. As the snake moves to take another morsel, the embryos rupture their egg capsules, drop into the water, and, as tadpoles, swim away to safety -- hatching one to three days earlier than they would have if left ...