منابع مشابه
PI3K At The Clinical Crossroads | Cover Story | Chemical & Engineering News
PI3 kinases are obvious targets for researchers developing cancer drugs. Formally known as phosphatidylinositol-3 kinases, the enzymes are involved in a laundry list of functions that contribute to the ability of cells to thrive. By adding a phosphate to signaling molecules, they set off a chain reaction that can lead to protein synthesis, cell survival, cell migration, and blood vessel growth....
متن کاملChemical & Engineering News Digital Edition - February 25, 2013
FIFTEEN YEARS AGO, two fraud cases sent shock waves through the world of photography, helping to trigger a revolution in photo conservation science. Long dismissed by the art establishment as a second-tier medium, “photography used to fight for space in galleries,” says James M. Reilly , director of the Image Permanence Institute in Rochester, N.Y. But by the 1990s the prestige—and price tags—o...
متن کاملMeasuring Online News Participation
Social plugins for sharing news through Facebook and Twitter have become increasingly salient features on news sites. Together with the user comment feature, social plugins are the most common way for users to contribute. The wide use of multiple features has opened new areas to comprehensively study users’ participatory practices. However, how do these opportunities to participate vary between...
متن کاملIdeology and Online News
News consumption is moving online. If this move fundamentally changes how news is produced and consumed it will have important ramifications for politics. In this chapter we formulate a model of the supply and demand of news online that is motivated by descriptive features of online news consumption. We estimate the demand model using a combination of microdata and aggregate moments from a pane...
متن کاملAnalyzing online news participation
The development of social media applications, such as blogs, Facebook and Twitter, has offered new participatory opportunities for everyday media users. This article contributes to research by looking into one specific aspect of the increasingly more participatory media ecology – the news comment feature. Drawing on a quantitative content analysis of 1100 news pieces, as well as spaces for user...
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ژورنال
عنوان ژورنال: Chemical & Engineering News Archive
سال: 1998
ISSN: 0009-2347,2157-4936
DOI: 10.1021/cen-v076n033.p003