Word: plasma
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Dates: during 2000-2009
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...measuring the current that flows across the sperm’s plasma membrane for the first time, Yuriy V. Kirichok and Betsy Navarro of the Children’s Hospital in Boston, found that sperm have a unique ion pathway. The discovery allowed Kirichok and Navarro to determine the function of the cation channel of sperm (CatSper) and could potentially lead to the development of new contraceptives designed to block the protein...
According to Kirichock, data on sperm physiology has long suggested that ion channels located on the sperm’s plasma membrane played a key role in determining sperm motility and sperm-egg interactions, and scientists have been unsuccessfully trying to measure the activity of those ion channels since...
...sperm’s constant wriggling and rigid plasma membranes made them difficult targets to study using the traditional patch-clamp technique. The patch-clamp method uses a tiny pipette to delicately rupture the plasma membrane of cells to measure the flow of electrical currents...
...changing the look and feel of department-store shopping. On his agenda: broader aisles (managers will be assigned 32-in. rulers or measuring tapes to make sure they leave at least that much space), less cluttered departments (15% of display racks will be removed), upgraded fitting rooms (with plasma-screen TVs in the waiting area), stores that are easier to navigate ("way finding" signs will guide shoppers) and more help looking up prices (at least 35 bar-code readers in every store). The changes may sound cosmetic, but Lundgren hopes they will distinguish Macy's from its competitors: Macy...
While in the U.S., people speculated about the outcome of the Rose Bowl and the size of Samsung’s new humongous plasma TV at Las Vegas’ Consumer Electronics Show, Europe had a very cold New Year. Flaunting global warming, already freezing temperatures in the Old Continent managed to get colder thanks to Russian President Vladimir Putin...