Xinxiang City voyage Teaching Equipment Co., Ltd. to focus on product quality, strictly control the production costs! Customer satisfaction, our purpose is to service the long-term to maintain a close working relationship with our customers. Looking ahead, we will close the service, we have to "quality first, reputation first, customer first, service first" for the purpose; adhering to the "integrity of spirit, the pursuit of excellence" business philosophy of human nature, so that "no one I Yes, I have gifted, gifted people I have changed ", to provide customers with the best quality service! We also look forward to comments and suggestions from every friend, and with new and old customers work together for a better tomorrow! Orders and abroad are welcome to plans to OEM! Welcome to come to inquire negotiate !!! production specimens commonly used preservative fixed drug, what the advantages and disadvantages? Alcohol: true scientific name ethanol plant specimens, the chemical structural formula CH3CH2OH. Is a colorless liquid, boiling point 78.3 ℃, volatile, accounting for 0.80, can be mixed with carbolic acid, glycerol, any water is a good solvent. Advantages: Alcohol has a strong dehydration plant specimens, can the cell surface and internal moisture removal. So that the molecular structure of the protein release, and protein denaturation and coagulation. This is the alcohol sterilization, conservation organizations, the basic principles of preventing corruption. Alcohol in tissue permeability preschool herbarium, mixing alcohol preservative was added, can enhance penetration, shorten corrosion fixed time. Specimens fixed with alcohol, color preserved, not strong irritant, no bad smell. Disadvantages: a high concentration of alcohol, enabling the rapid degeneration of the cell surface protein coagulation, forming a protective film, but to stop the drug into the deep play. Therefore, the alcohol concentration of fixed specimens, generally should not exceed 75% (volume percent) 2. Dehydration too teaching herbarium specimen shrinkage, up to about 20%, and can dissolve fat and lipids. Thus, lipid rich organs such as the brain specimens, do not use alcohol fixative. Another drawback is that it's volatile fast, easy loss. Rare plant specimens, plant specimens, teaching voyage by voyage Teaching Equipment Co. Xinxiang. 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!