Products: electronic communications measuring instruments and virtual instruments, multimedia audio-visual equipment, computers, office furniture, general education and special equipment, training equipment, laboratory supplies. Whiteboards, projectors, printers, scanners, fax machines, a variety of biochemical analytical instruments. Engineering: Biochemical Physics Laboratory building, campus radio building, multimedia classroom building. Herbarium include: Chinese herbarium, herbs herbaria, herbarium herbarium, biological herbarium, taxidermy museum, herbarium, moving Herbarium, simulated ecological museum specimens, ecological park, Biological Park, Herbarium, History Room geography room. Prepare specimens commonly used preservative fixed drug, what the advantages and disadvantages? Phenol: Phenol preschool herbarium scientific name, also known as carbolic acid. Phenol and ethanol plant specimens show a similar, but also make the protein coagulation, is a good antiseptic, but no fixed specimen herbarium custom hardening effect is generally not used alone, much used in conjunction with other drugs. Disadvantages: 1. there is a bad smell, so color is poor specimen of muscle (especially cardiac) and brain specimens and other processing are not ideal. High concentrations of phenol has a strong corrosive, pay attention to protection contact. Concentrated phenol can burn the skin, such as accidentally stained, requiring immediate rubbing alcohol. Low concentrations of phenol can still make nerve endings paralysis, long-term direct contact, should take appropriate protective measures. 2. For phenol bad smell, particularly poor color samples stored disadvantage plant specimens, it was in the phenol derivatives, pentachlorophenol sodium proposed to replace it. Mildew sterilization function of sodium pentachlorophenol phenol potent than phenol strong, bad smell few specimens stored color better than phenol, tendons, fascia and other connective tissue white, yellow fat, muscle dark red to brown. Pentachlorophenol sodium concentration used is 0.25 to 1.0%, if the concentration further increase, the treated muscle specimens appears dark brown, typically 0.75% solution. Sodium pentachlorophenol usually be mixed with formaldehyde used. Phenol can corrode glass, cadavers fixative treated by phenol preservative, is not suitable for plexiglass package. Preschool herbarium 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.