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Tag: "gradient" at biology news

New understanding of cell movement may yield ways to brake cancer's spread

...e cell, enzymes degrade the PIP3 lipid, creating a gradient from one end of the cell to the other. It is this PIP3 lipid gradient that sets the cell into motion toward the right direction. The PIP3-binding portion of DOCK180 sense...

Researchers make headway in mystery of migraines

...otassium from outside, the sodium pump maintains a gradient of potassium, which is critical for the propagation of electrical signals along nerve cells. Like an air conditioner in the heat of summer, the sodium pump is a massive energy hog, consuming around 30% of the energy produced by the cell in order to p...

Gradient guides nerve growth down spinal cord

... University of Chicago researchers reported that a gradient of biochemical signals known as the Wnt proteins a...m previous studies, Zou and colleagues knew that a gradient of various Wnt proteins, including Wnt4, formed along the spinal cord around the time of birth. Here...

U-M scientists discover identifying markers for primitive blood-forming stem cells

...t markers we use to purify HSCs are expressed as a gradient from high to low across the hematopoietic cell hierarchy," says Omer H. Yilmaz, co-first author and a student in the Medical School's M.D./Ph.D. program. "What's really exciting about this finding is that now we have markers that turn on and off abru...

Tropical Atlantic cooling and African deforestation correlate to drought, report scientists

...and cools relative to the ocean, there is a larger gradient between the ocean temperature and the land causing less moisture to be pulled from the ocean air toward the land. Weldeab and his colleagues studied cores from beneath the ocean floor of the Gulf of Guinea, in the tropical Atlantic just off the coas...

Forsyth scientists gain greater understanding of how embryos differentiate left from right

...cal functions, cytoplasmic pH and membrane voltage gradient (Vmem) regulation. Varying either pH or Vmem, independently of direct manipulation of H+-V-ATPase, caused disruptions of the normal LR pattern, suggesting important roles for both physiological parameters. V-ATPase inhibition also abolished the norma...

Some like it hot: Worms at deep-sea vents favor a fiery 45-55°C

...y above freezing, a steep and variable temperature gradient exists around the thermal vents, making it difficu...(58 and 142 degrees Fahrenheit). When this thermal gradient was established, all the worms migrated to parts of the tank registering 45 to 55 degrees Celsius. ...

Chemical signaling helps regulate sensory map formation in the brain

...of the journal Nature, the researchers show that a gradient of a molecule known as Wnt3 counterbalances anothe...gues reveal a new role for Wnts. They show that a gradient of Wnt3 along the medial-lateral axis within the developing brain is the opposing regulating force, ...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

... nanostructure by expelling water and developing a gradient in the local pH. This in turn influences lipid organization and the form of the silica nanostructure, reduces stress, and ultimately improves the living conditions of the ensconced cellular tenants. The work was initially funded by Sandia's Laborat...

Even when faint, ovary scent draws sperm cells

...ofluidic device the ability to generate a chemical gradient with transporting sperm cells to evaluate sperm ch...al approach for precisely controlling the chemical gradient and accurately tracking chemotactic events. This combination led to greater repeatability in the exp...

Harmful Algal Blooms monitored from space in Chile

...st. With in situ measurements you cannot produce a gradient map as obtained with EO images. The value of this information is the area and resolution obtained in a single didactic image." Last month, the CAP project was presented at the AQUA2006 event organised by the World Aquaculture Society in Florence, I...

New technology enables faster, more efficient cell harvest: Cell therapy meeting study

...ssing time of about 2.5 to 4 hours with the Ficoll gradient technique. The Filter Harvest System also exhibited higher yield of MNCs for significantly better recovery (60 to 95 percent) than the Ficoll method. The Pall Filter Harvest system can be used as a closed system that adheres to Good Manufacturing...

Embryos exposed in 3-D

...ssing time of about 2.5 to 4 hours with the Ficoll gradient technique. The Filter Harvest System also exhibited higher yield of MNCs for significantly better recovery (60 to 95 percent) than the Ficoll method. The Pall Filter Harvest system can be used as a closed system that adheres to Good Manufacturing...

Cholera pathogen reveals how bacteria generate energy to live

...in concentrations between outside and inside. This gradient acts like a battery that powers essential cell functions, such as the movement of the bacterium’s tail, the flagellum. Most cells, including human cells, use gradients of protons for this energy conservation function, but enzymes that work with so...

Salty oceans provide early warning for climate change

...sure wave. “The surge of salt generates a pressure gradient in the ocean that sends energy to the north without water actually being transported,” explains Zahn. Regardless of whether ocean circulation speeds up or slows down it causes significant climate change, altering the hydrological cycle and affect...

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