Soaked specimens and materials soaked specimens and test materials should have the label, the label be affixed to the real, outside waxed, by number smoothly into the biological hood save. Specimen bottle can not be shaken, in order to avoid break, and there should not be placed in direct sunlight, high temperature or below 0 ℃ to put Henan herbarium offer, sealing wax to prevent melting and glass cracking. Plant material can also experiment without liquid soaked specimen bottle and put some 20% formalin soaked cotton wool, white superstructure, and then sealing material for a long time you can put a small amount of 20% formalin liquid in a plastic bag Henan herbarium price, then add the experimental material, tie the bag. Can also be long-term preservation. Register to use the mark by making a note of the date the specimen bottle and liquid formulations, to facilitate future inspection process. Prepare specimens commonly used preservative fixed drug, what the advantages and disadvantages? Formaldehyde: aka ants aldehyde, is a colorless gas with a strong odor stimulation, soluble in water, its 35 to 40% aqueous solution of a trade name is usually called formalin. Advantages: Formaldehyde easily with protein amino combine to make the protein coagulation, gelatin coagulation, tissue fixation, but also save fat and lipids, permeability strong, shrinkage small, inexpensive to maintain the position of the specimen form and maintain a good skin color, is an excellent, the most widely used preservative fixative. Cons: The fixed tissue stiff brittle, easily pulled off the muscle fibers, inconvenience anatomy operate; there is a strong irritant, eye conjunctiva, respiratory tract and frequent contact with the skin have some damage. Henan plant specimen boxes, plant specimens, teaching voyage by voyage Teaching Equipment Co., Ltd. Xinxiang City. Xinxiang City voyage Teaching Equipment Co. (www.xxyuanhang.cn) strong, credible, in Xinxiang specimen model industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the voyage into the brilliant teaching and you work for a better future!