II. Paraffin technical advantages and disadvantages of paraffin (paraffin section) histological methods in conventional production techniques most widely used. Paraffin sections were observed not only for normal tissue morphology, but also the pathology and forensic medicine and other disciplines to study, observe and form the main method to determine changes in cells and tissues, but also has been quite widely used to study many other disciplines in. Teaching, light microscopy biopsy specimens mostly paraffin sections were prepared. In immunohistochemistry on this one. Frozen sections simplicity biological sliced ??manufacturers, producers lost during antigen activity less, but the organization is poor cell morphology; paraffin sections biological many steps, the producers of the antigenic activity has reduced, but the clear tissue morphology is immunohistochemistry One conventional method for preparing slices. Paraffin-embedded tissue sections generally used to detect cytoplasmic or nuclear antigen within, not so surface antigen staining. Three. Frozen section frozen section technique is a way for organizations at low temperatures rapidly cooled to a certain hardness, and then slicing approach. Because the production process than the paraffin fast, easy, and more used in rapid pathological diagnosis surgery. Frozen sections of many types of biological slice supply, low-temperature cryostat frozen section method, carbon dioxide frozen section method biological slice suppliers, methanol cycle refrigeration frozen section method. These methods, along with the change, the development of science and technology era, many years ago, is considered to be a very important technology, is now gradually being eliminated. Of course, some technologies, such as low-temperature cryostat frozen section method is favored. Biological slice manufacturers _ voyage teaching (certified) _ biological sections provided by Xinxiang City Teaching Equipment Co. voyage. Xinxiang City voyage Teaching Equipment Co. (www.xxyuanhang.cn) is an industry leader in Henan Xinxiang, specimen model years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. On the voyage instructional leadership with the staff warmly welcome all inquiries negotiations to create a better future teaching voyage.