Technology

Cupertino -- The online Apple Store posted a pre-order notice Friday for the iPad, the California technology firm's entry into the digital-reader market.

Cambridge -- U.S. scientists say they've built a sensor array that, for the first time, can detect a molecule of hydrogen peroxide coming from a single living cell.

San Jose -- U.S. scientists say a multi-year study involving polymers could lead to the development of new types of biodegradable, biocompatible plastics.

New York -- U.S. scientists say they've devised a method that uses blood vessel cells to grow unlimited amounts of adult stem cells.

Boston-- A U.S. scientist, saying antenna technology hasn't kept pace with wireless advancements, is starting a project he says might transform communication devices.

Cambridge -- Massachusetts Institute of Technology researchers say they are developing a computer language that will produce flexible and dynamic Web security.

New York -- Rising pressure to provide free WiFi service at U.S. airports is countered by economic realities, the managing director of two airport networks said.

Madrid -- Spanish scientists say they've created an ultrasound technique to determine water content, thickness and other properties of leaves without touching them.

Greenbelt -- NASA's Goddard Space Flight Center in Greenbelt, Md., has selected Zantech IT Services Inc. to provide programmatic and institutional learning services.