⑵ dehydration: is the tissue cells contained moisture removed. Usually with ethanol (Alcohol, alcohol), the concentration of the delivery rise to 100%. This process also enables organizations to block further hardened. ⑶ Transparency: with both pure alcohol soluble organic solvent can melt paraffin tissue sections, the tissue to replace tissue slicer alcohol so immersed in paraffin. Usually with xylene (xylene) is transparent agent. ⑷ Baptist wax: The temperature inside the conduct. The organization has been transparent pieces into heated to melt the wax and let soak paraffin tissue, as a support medium. ⑸ embedding: The tissue blocks have dipped into the hot melt wax paraffin embedding, the rapid condensation of animal tissue slices, never will be a wax-embedded tissue. ⑹ sections: The slicer. Commonly used rotary slicer have flat push type. The easy-to-use rotary cut serial sections. Slice thickness adjustment purposes with the producer. Mostly teaching specimen thickness 5 ~ 6μm. ⑺ patch to dry: the warm paraffin Puyang flattened tissue sections on glass slides move, dried, can be processed for staining. After staining with gum, sloping piece sealing lid, can be permanently stored. The following briefly describes several aspects from the principle of common staining technique: a display of succinate dehydrogenase (SDH) activity nitro -BT law: (Succinate dehydrogenase) ⑴ positioning enzymes and biological significance: succinic off mitochondrial marker enzyme catalase, which is present in all cells of aerobic respiration, and mitochondrial closely. Without coenzyme and enzyme itself has flavoprotein (FP, Flavoprotein) supplemented groups. In the group of reaction is often used to reflect the situation in the citric acid cycle. ⑵ Principle: The final step of the above reaction principle, nitro -BT (Nitro-blue tetrozolyum, tetrazolium) systems can vary tetrazolium ring compounds, when it accepts the hydrogen itself is reduced to a colored precipitate the product ( A) (Formazan). Tissue sections | animal tissue slices | voyage teaching (certified merchants) provided by Xinxiang City Teaching Equipment Co. voyage. Xinxiang City voyage Teaching Equipment Co. (www.xxyuanhang.cn) located in the village of Hongqi District Xinxiang City of Henan Province town freemason 207 number. Scraps and development in the wave of market economy, the current voyage teaching has a high profile in the sample model, enjoys a good reputation. Teaching voyage made the whole network business alliance certification, marking our service and management level has reached a new height. Voyage teaching staff willing to work with all people of insight and common development, for a better future.