QINGHUA SCIENCE & EDUCATION EQUIPMENT CO.,LTD. QINGHUA ELECTRONIC INSTRUMENT CO.,LTD.
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Refrigeration compressor performance test bench, compressor performance test teaching model
Compressor (compressor), a driven fluid machinery that lifts low-pressure gas to high-pressure gas, is the heart of the refrigeration system. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and discharges the high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle, thereby realizing compression → condensation (heat release) →expansion→evaporation (heat absorption) refrigeration cycle.
2020
07-04
Junior high school mechanics suit vehicle seat belt protection effect experience device
The "safety" suit junior high school mechanics has become the primary consideration for drivers and occupants, and it is also one of the most important performances of automobiles. Traditional components that ensure safe driving, such as rearview mirrors and left and right door mirrors (traditional rearview system), seat belts, AIRBAG (airbag) and ABS (anti-lock brake system), etc., have been used by the majority of drivers and passengers. Familiar.
07-01
Photovoltaic power generation system experimental instrument, solar photovoltaic power generation training station
The indoor photovoltaic power system training platform is composed of solar cell module, battery module, controller module, off-grid inverter module, load regulation control module, monitoring instrument module, PC monitoring module, and other one-sided components.
06-28
American merchants favor Shehong "biological gold"
Sichuan Tiangui Animal Products Processing Factory, located in Shehong Meifeng Industrial Park, has received frequent good news. After the new technology of injection-grade heparin sodium bioenzymatic preparation in the factory passed the appraisal and certification of project results of Sichuan Science and Technology Department on April 8, representatives of Pfizer Company of the United States and the head of Nanjing Jianyou Pharmaceutical Company came to Tiangui Animal Products Processing Factory on April 11 to inspect and discuss cooperation matters. Sichuan Tiangui Animal Products Processing Factory is a private enterprise founded more than 10 years ago by Cai Tiangui, a Shehong native. The enterprise mainly uses the small intestine of live pigs as raw materials to produce heparin sodium and supplies it to domestic pharmaceutical companies. The pharmaceutical companies also transferred it to large foreign companies. In 2008, the sales volume of crude products reached more than 1000 kilograms. Heparin sodium is a natural polysaccharide substance extracted from biological raw materials. It is a mucopolysaccharide sulfate anticoagulant. It is clinically effective for cardiovascular system, respiratory system, liver, kidney disease, ulcerative colitis, constipation, and burns. It has a unique effect on arteriovenous thrombosis and blood plugs, and also has a significant effect on anti-cancer. The selling price of crude heparin sodium in China ranges from 12000 yuan to 15000 yuan per kilogram, while that of fine products is above 30000 yuan. Heparin sodium is recognized as "biological gold" in the world ". For more than 10 years, the factory has been employing university biology experts and professors to guide the production technology. The supply of heparin sodium products has been in short supply. It has established a good supply relationship with Nanjing Jianyou biochemical company and Chengdu Dongfeng biochemical company for a long time. Through these companies, the products are exported to the United States, France and other European and American countries and Southeast Asia. On April 8, Tiangui Animal Products Processing Factory injection grade heparin sodium bio-enzymatic preparation of new technology by the Sichuan Provincial Science and Technology Department product achievement appraisal certification, certification said: "The product has reached the Chinese Pharmacopoeia heparin sodium quality standards, by a number of customers trial has been recognized; the project development has reached the domestic advanced level; the process has green manufacturing characteristics, in line with the current environmental protection requirements. It is recommended to further increase industrial production." On April 11, Ms. Giaapleps, a representative of Pfizer, said after a detailed inspection of the production environment, production process and products of Tiangui livestock products processing plant: the production environment here is good, the production process meets the requirements of the United States, and she is satisfied with the product quality. she will further establish a long-term supply and marketing relationship with the plant, report the situation after returning home, and is expected to become an investment partner of the company.
2019
01-13
Shanghai Entomological Museum enters busy season from late spring to early summer
300 Fenglin Road-In the quiet yard of the Institute of Plant Physiology and Ecology, Shanghai Academy of Life Sciences, Chinese Academy of Sciences, a beautiful "flying party" is quietly brewing ". Starting this month, the 500-square-meter open-air butterfly garden of the Shanghai Entomological Museum will enter a busy season: students traveling, guests and friends of the "Science and Technology Week", and children celebrating the "June 1" International Children's Day will not miss the butterfly. The best season for "close contact. In addition, the city's first free "insect summer camp" also has plans to open this year, dozens of children of migrant workers in Xuhui District will become "lucky" ...... Such excitement will continue until the golden autumn of October. Because for most insects, 22 ℃ ~ 27 ℃ is the most suitable temperature for survival. In Shanghai, if you want to "play" with insects in nature, you have to grasp the half year from the end of April to October. No, the reporter found in the greenhouse of the insect museum a few days ago: the little guys who pupate into butterflies are getting darker and have begun to break out of the cocoon. The Shanghai Entomological Museum, formerly known as the Insect Department of the Shanghai Aurora Museum, was built in Xujiahui in 1883 and enjoyed the reputation of "the British Museum of Asia" in the last century. After upgrading and transformation, it is now the "leading figure" in the city's popular science venues. The indoor exhibition hall covers an area of 2600 square meters and has more than 100 million insect specimens from all over the country. Among them, the only insect in China that has been designated as "national first-class protection"-the coracoid butterfly, and the "goddess of light" flash butterfly with a single specimen price of 360000 yuan, are all "treasures of the town hall". The insect net room (I .e. butterfly garden) and glass greenhouse are "outdoor branches" put into use last year: late spring, early autumn and the whole summer are "good times" for butterfly garden. children can try how to catch butterflies with nets, but they must be released before leaving. the staff will "return" a butterfly specimen for you to make bookmarks, greeting cards and other souvenirs. After the weather turned cool, insects "moved" to the greenhouse, visitors can ignore the cold outside and continue to "spy" the secrets of insects in the winter. In the butterfly garden, there are also flowers and plants and small bridges and flowing water, but it is different from the general garden. It seems that there is no need to pay attention to bright colors of plants. They are determined not to "eat" pesticides, and even "weeds" are too lazy to take care. Experts from the Entomology Museum told reporters that the protagonist here is not plants, but insects. As long as plants that can provide parasites for insects, they must "indulge" its growth. For example, the kind of small flowers that will open inconspicuous pulp grass, rich in nectar, is one of the favorite butterflies.
Recently a new exhibition opened up human specimens
The new exhibition hall for human specimens is about to be completed. The exhibition hall has added new exhibits to the specimens in the former exhibition hall. Science and Technology Association Award as the city's popular science education base, in the near future will be to the public exhibition hall, open to primary and secondary school students.
World's Largest Umbilical Cord Blood Bank, 500000 Enabled
On April 21, the new bank of Beijing umbilical cord blood hematopoietic stem cell bank was completed and put into use in Beijing Economic and Technological Development Zone, thus completing the third expansion since the establishment of the bank in 1996. It is reported that the new library has a total investment of 0.12 billion yuan, a construction area of nearly 10,000 square meters, and a library capacity of 500000 copies. It is currently the largest umbilical cord blood hematopoietic stem cell bank in the world. ● 24-hour monitoring system "escort" liquid nitrogen library The new library consists of liquid nitrogen library, laboratory, purification work area, data database and other parts. Among them, the liquid nitrogen library has installed more than 100 storage tanks, which are the largest single liquid nitrogen tanks in the world today, each tank can store 5000 specimens. "Umbilical cord blood stem cells need to be stored in liquid nitrogen, and their storage process must be absolutely safe." Dr. Gao Feng of Beijing umbilical cord blood bank told reporters that all tanks are connected by vacuum pipes, and the terminal is connected to an outdoor storage tank with 30000 cubic meters of reserves, which can ensure 24-hour uninterrupted replenishment of liquid nitrogen. In addition, the status of all liquid nitrogen storage tanks and the replenishment of liquid nitrogen are controlled by the central control room, from which the status of the storage tanks can be monitored, and any information of umbilical cord blood stem cells can be retrieved at any time. At the same time, the monitoring system installed in the library can implement 24-hour monitoring. ● Donor information is disclosed as an active donation barrier. There are about 65700 umbilical cord blood stem cells in Beijing umbilical cord blood bank, of which nearly 50000 are voluntarily funded and stored, and only 10000 are voluntarily donated by citizens. "People who voluntarily donate cord blood stem cells often have to undergo the test of personal information being made public." In this regard, Gao Feng explained that some genetic diseases only develop after 3 to 5 years. Therefore, in order to ensure that the donated cord blood stem cells do not contain any genetic diseases, the Beijing Cord Blood Bank must conduct long-term health status of donors. track. "From illness to medical records to changes in home address, we must be informed in time, which makes it difficult for many people to accept psychologically." Citizens who actively donate cord blood stem cells, once they and their families suffer from leukemia and need hematopoietic stem cell transplantation, they will have the priority of matching in Beijing cord blood bank. ● Millions of patients wait for hematopoietic stem cells every year. There are millions of patients waiting for hematopoietic stem cell transplantation in my country every year. There are 40000 new patients with leukemia every year, of which more than 50% are children. Umbilical cord blood stem cell transplantation has become an important means for the treatment of leukemia. Umbilical cord blood stem cell transplantation in China has achieved more than 500 cases of clinical application. At present, the Beijing umbilical cord blood bank uses umbilical cord blood for the treatment of more than 200 diseases, of which 85 umbilical cord blood helps 70 patients complete hematopoietic stem cell transplantation, and the success rate of umbilical cord blood transplantation is more than 80%. The cord blood stem cells provided by the Beijing Umbilical Cord Blood Bank are not only used in various common diseases such as leukemia, severe aplastic anemia, thalassemia, myelodysplasia, lymphoma, etc., but also applied to mucopolysaccharidosis, Langerhans cell histiocytosis, WAS syndrome, severe combined immunodeficiency, Parkinson and more than 20 diseases.
In 2005, our company was named "Zhejiang Province Teaching Instrument Industry Advanced Collective"
