Abstract
The development of high brightness and short pulse width (<200 picoseconds) x-ray lasers now offers biologists the possibility of high-resolution imaging of specimens in an aqueous environment without the blurring effects associated with natural motions and chemical erosion. As a step toward developing the capabilities of this type of x-ray microscopy, a tantalum x-ray laser at 44.83 angstrom wavelength was used together with an x-ray zone plate lens to image both unlabeled and selectively gold-labeled dried rat sperm nuclei. The observed images show ∼500 angstrom features, illustrate the importance of x-ray microscopy in determining chemical composition, and provide information about the uniformity of sperm chromatin organization and the extent of sperm chromatin hydration.
Original language | English (US) |
---|---|
Pages (from-to) | 269-271 |
Number of pages | 3 |
Journal | Science |
Volume | 258 |
Issue number | 5080 |
DOIs | |
State | Published - 1992 |
Externally published | Yes |
ASJC Scopus subject areas
- General