نتایج جستجو برای: d and 3
تعداد نتایج: 17162174 فیلتر نتایج به سال:
Lympho-stromal interactions in the thymus crucially de- termine the fate of developing T cells. Epithelial cells, inter- digitating reticular cells, macrophages and fibroblasts all play a role in the shaping of the T cell repertoire. Recently published evidence shows that lympho-stromal interaction acts bi-directional. Developing T cell themselves, at different stages of differentiation, contro...
The invention of the digital camera is attributed to Eastman Kodak engineer Steven Sasson in 1975 [1]. Sasson’s device recorded 0.01-megapixel black-and-white pictures to cassette tapes. The first digital photograph required 23 seconds to generate and needed a television set to display [2]. Today, digital cameras recording greater than 10-megapixel color photos to Secure Digital (SD) cards with...
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