Prepare specimens commonly used preservative fixed drug, What are the advantages? Glycerol: glycerol scientific name, is a colorless, transparent, odorless, viscous liquid with a sweet. Advantages: a mixed preservative fixative, glycerin is a good selection of drugs. Use of its corrosion resistance, moisture and inorganic salts of certain drugs to dissolve the special forces, which dubbed the solution is relatively stable, easy to dry specimens are fixed, more flexible, connective tissue is slightly transparent. 2. mixed with glycerin can absorb drugs (such as formaldehyde, ethanol, phenol, etc.), stranded in the sample interior and surface, making these drugs less volatile and loss of plant specimens show, to enhance the effect of these drugs Xinxiang plant specimens fixed preservative manufacturers, improve the ability of anti-mildew. Glycerin can mitigate volatile formaldehyde, reducing irritating odor, improve the teaching and learning environment. Glycerol having hydrophilic and dewatering, and as the concentration increases strengthened. High concentrations of glycerol enables organizations to protein denaturation, played antiseptic effect, but also make organizational severe dehydration, specimens shrink dry. Glycerol dehydration antiseptic effect, can be made semi specimens; glycerol transparent effect, can be made translucent specimens. Plant specimen collection should note the following one. Select as roots, leaves, stems, flowers, fruit. Because the plant flowers and fruits are the main basis for the identification of plant specimens, but also try to keep the integrity of the specimen. Acquisition little herb, to the roots dug up, such as higher plant specimens soaked specimens, can be divided into upper, middle and lower three sections acquisition, it has roots respectively, leaves, flowers (fruit), then combined into a specimen. 2. To be representative. To capture the growth in the normal environment of robust plants, not adopt perverted, sick plants, to adopt the characteristics of a typical representative of the plant branches, not mining leggy branches sprout branches, dense branches and so on. 3. Protection of plants collected good. To collect the specimen into the collection box, such as the plant softer toilet paper should be fitted, and pressed specimens folder. 4. Give the collected specimens hang tag, and indicate the collection location, date and name of the person collecting, strictly speaking should note the growing environment and morphological characteristics of plants, such as land, pond, sunny, odor, color flower shape, milk and so on. Herbarium custom voyage teaching (certified), plant specimens 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.