The purpose of the study was to compare the effect of semithin section by microscope and ultrathin section by electron microscope in observation of apoptosis.

Using the comparative methods of paraffin-section,semithin-section with light microscopy and ultrathin-section with transmisson electron microscopy,some aspects,i.

The Study of stratified iodide distribution in a single silver iodobromide tnicrocrystal by ultrathin sectioning and X-ray line scan were carried out.

The effect of the thickness of ultrathin sections on the topographical contrast in the images of atomic force microscopy (AFM) had been studied.

Seawater samples were collected from the area where the high mortality of clam Meretrix meretrix occurred in Qidong city,Jiangsu province,and the tissues and organs in the infected clam such as mantle,branchia,foot and digestive deverticula were analyzed by chemical method,bacteria isolation and ultrathin sections.

The various factors which causes the ultrathin section\'s staining contamination are discussed,and a contaminated EM image processing method is introduced.

Imaging and dissecting of ultrathin sections of human ligual squamous carcinoma tissue by AFM;

The virion was found by electron microscope in negative staining tissue and ultrathin sections of the diseased shrimp.