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ejection in Biological News

Basis for DNA ejection from single phage particles

Studying phage, a primitive class of virus that infects bacteria by injecting its genomic DNA into host cells, researchers have gained insight into the driving force behind this poorly understood injection process, which has been proposed in the past to occur through the release of pressure accumul...

Life on Earth came from other planets

...ve proven that microbes can easily survive an interplanetary journey. Many species of microbe have evolved the ability to survive a violent impact and ejection into space; the frigid temperatures and vacuum of an interstellar environment; the UV rays, cosmic rays, gamma rays, and ionizing radiation they would...

Slicing chromosomes leads to new insights into cell division

... Hunt's results validate the theory that "polar ejection forces" are at play. Scientists had hypothesized t...ding chromosome movements. In this capacity, polar ejection forces would play a central role separating chromo... had established a direct link until now. Polar ejection forces are thought to arise out of the interaction...

Gene therapy reversed heart damage in heart failure

...ol concurrently. Twelve weeks after receiving the treatment, the rats who received the ARKct had a significantly increased left ventricular ejection fraction. The treatment also reversed the left ventricular deterioration and normalized the neurohormonal status. Dr. Koch said that targeting the GRK...

Scientists discover DNA knot keeps viral genes tightly corked inside shell

... A novel twist of DNA may keep viral genes tightly wound within a capsule, waiting for ejection into a host, a high-resolution analysis of its structure has revealed. Using electron microscopy and three-dimensional computer reconstruction, UC ...

Three Dimensional Visualization of Right Ventricle Provides Important Information for Treatment of Patients with Tetralogy of Fallot, According to a Study in The American Journal of Cardiology

...University of Washington, VentriPoint is developing this breakthrough diagnostic tool that can provide measurement of a heart's volume and ventricular ejection fraction. The VentriPoint Diagnostic System, together with its associated online service, is being developed for a variety of heart related disease st...

Herceptin and chemo improves response rates without major adverse effects in HER2 breast cancer

...re surgery to make it as effective as possible. To minimise the risk, we excluded patients with any previous heart problems and excluded patients with ejection fractions of below 55%. However, our results showed no increase in toxicity for the combination chemotherapy plus trastuzumab compared with chemothera...

Eat less or exercise more? Either way leads to more youthful hearts

..., the left ventricle is a suction pump," Kovcs explains. "Think of the rubber bulb of an old-fashioned bicycle horn you squeeze it (the analog of the ejection phase of the cardiac cycle), then let go (the analog of the filling or diastolic phase) and the rubber bulb springs back to its original shape, suckin...

Building blocks of life formed on Mars

...ar to the Svalbard samples, was during rapid cooling of fluids on Mars. A second event produced organic material from carbonate minerals during impact ejection of ALH 84001 from Mars. The results of this study show that volcanic activity in a freezing climate can produce organic compounds, remarked co-auth...

Geron Demonstrates hESC-derived cardiomyocytes improve heart function after myocardial infarction

...nificantly improved (0.01) in animals that received cardiomyocytes compared to all three control groups. MRI analysis showed improved left-ventricular ejection fraction (p=0.05) in the cardiomyocyte-treated rats compared to controls, as well as a 2.5-fold increase in systolic wall thickening in the infarct zo...

An elephant tail

...attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps...ications did not reduce noninvasive measures of vascular stiffness, improve ejection fraction, or improve clinical outcomes. To the contrary, we noted a possibl...

Little known DNA repair enzyme may be a tumor suppressor gene

...attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps...ications did not reduce noninvasive measures of vascular stiffness, improve ejection fraction, or improve clinical outcomes. To the contrary, we noted a possibl...

Use of amino acid supplement following a heart attack provides no benefit, may be harmful

...attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps...ications did not reduce noninvasive measures of vascular stiffness, improve ejection fraction, or improve clinical outcomes. To the contrary, we noted a possibl...

Potential heart benefit found in stem cells

...for cardiac therapy is the bone marrow. To improve global left ventricular ejection fraction (EF, the volume of blood pumped out of the heart's main chamber du...single beat) and regional left ventricular wall motion, which is related to ejection fraction, researchers evaluated a treatment with bone marrow-derived cells,...
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