Rachel Horowitz-Scherer, Chris Woodcock (2010) CIL:769, Patiria miniata, sperm. CIL. Dataset

Phosphorus has a characteristic electron energy loss with an edge at 160 eV. The Zeiss 902 electron microscope permits images to be recorded at different energy losses which can be digitized and processed to yield a net phosphorus image. For nuclear chromatin, phosphorus is primarily located in DNA, allowing its distribution in chromatin fibers to be mapped. Electron energy loss (EELS) imaging is also known as electron spectroscopic imaging (ESI) and electron energy filtering TEM (EFTEM).
Starfish sperm chromatin, which has clearly defined chromatin fibers was fixed, embedded in Lowicryl at low temperature, thin sections prepared and imaged unstained. The 3 grouped images were recorded with a Zeiss 902 energy filtered TEM at 80KV using 5eV windows centered on energy loss values of 170, 160, and 120eV (this image).

磷元素具有特定的电子能量损失特征，其边缘位于160电子伏特。蔡司902型电子显微镜允许记录不同能量损失的图像，这些图像可数字化并处理后得到净磷图像。对于核染色质，磷主要位于DNA中，这使得其在染色质纤维中的分布得以描绘。电子能量损失成像（EELS）也被称为电子能谱成像（ESI）和电子能量过滤透射电子显微镜（EFTEM）。海星精子染色质，其染色质纤维结构清晰可辨，经过低温固定、Lowicryl介质包埋，制备了薄片并进行无染色成像。三组图像使用蔡司902型能量过滤透射电子显微镜在80KV电压下，以5电子伏特为窗口，分别聚焦于170、160和120电子伏特的能量损失值进行记录（此图像）。