Joint replacement is a medical treatment in which an artificial joint is used to replace a painful joint that has lost function.Our joint replacements are divided into Hip Artificial Prosthesis and Total Knee Artificial Prosthesis System.
The artificial femoral stems are also available in a plain type (which requires cement) and a coral type without cement. Indications for joint replacement include osteonecrosis, irreducible comminted fractures and dislocations, osteoarthropathy with pain and mobility disorders, rheumatoid arthritis with rigidity or difficulty in mobility, and bone tumors. Complications of replacement include loosening of the prosthesis, wear or fracture, deep infection, foreign body reaction, and soft tissue calcification that impedes movement. hip Replacements,Hip Implants,Hip Artificial Prosthesis,Artificial Prosthesis Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.aomedortho.com
DNA fingerprints, giving the corn "identity"
In an unexpected turn of events, farmer Wang from Pinggu found himself victorious in a legal battle thanks to a cutting-edge technology—corn DNA fingerprinting. Alongside fellow farmers from nearby villages, he had purchased corn seeds from a local agricultural extension station and planted over 1,000 mu of them. However, the resulting plants varied greatly in height and ear size. Concerned, Wang took the seeds to a seed testing center, where they were found to be only 60% pure, far below the national standard of 96%. Armed with this evidence, he sued the agricultural station and was awarded more than 300,000 yuan in compensation. This case highlights how a once obscure biotech tool is now playing a vital role in agriculture.
Zhao Jiuran, a researcher at the Maize Research Center, explained that DNA fingerprinting can accurately identify seed purity and authenticity, directly benefiting both seed companies and farmers. "Applying such high-tech methods to agriculture opens up new frontiers in biotechnology," he said. With over 200 officially registered corn varieties in China and more than 1,000 approved by various provinces, the challenge of distinguishing between similar types has become increasingly complex. Farmers and even experts often struggle to tell them apart, leading to issues like counterfeit seeds and illegal reproduction of premium varieties.
"Previously, variety identification relied on visual observation—planting seeds and monitoring growth stages," Zhao explained. But as genetic diversity narrows, many corn varieties have become nearly identical, resembling 'brothers.' This makes traditional methods ineffective. DNA, however, is present in every cell of a plant, including roots, stems, leaves, and ears. Each variety has a unique DNA profile, making it an ideal marker for identification.
"The term 'DNA fingerprint' comes from its ability to distinguish individuals, just like human fingerprints," Zhao added. "Each corn variety has a distinct molecular identity, providing a reliable 'ID card' from the genetic level."
Internationally, the International Union for the Protection of New Varieties of Plants (UPOV) is working on global efforts to use DNA fingerprinting for species identification. Zhao was invited to participate in UPOV’s 9th BMT technical conference and joined an expert group for international collaboration. In China, the Beijing Basic Research and Innovation Platform for Agricultural Breeding launched a project called "Super Corn Germplasm Innovation and DNA Fingerprint Library Construction." As a result, China's first maize DNA fingerprint database was established at the Beijing Academy of Agriculture and Forestry. "By extracting DNA and comparing it with the database, we can quickly determine the variety," Zhao said, expressing excitement about the progress.
Efficiency has also improved significantly. The old method required hours of work in liquid nitrogen, while the new single-seed DNA extraction technique takes just five minutes per sample, increasing efficiency by nearly 20 times. Due to its simplicity, speed, accuracy, and cost-effectiveness, more institutions are adopting this technology. Initially used by county-level seed companies, it has now expanded to major enterprises like DeNong and Monsanto, as well as international players. Many seed management agencies and companies are actively learning this technique.
Currently, Zhao's team has identified DNA fingerprints for over 200 major maize hybrids under the Ministry of Agriculture's supervision, developed specific DNA standards for maize varieties, and conducted forensic analysis for over 90 types of seeds for courts and law enforcement. This technology is not only revolutionizing seed verification but also setting new standards for agricultural science.
Beyond corn, the Beijing platform has made significant strides in other crops. For example, in wheat research, a series of high-yielding hybrid parents were established using a winter-spring hybrid model, laying the foundation for new wheat varieties suited for northern China. Seed production techniques have boosted average yields from 400 to 460 pounds per mu, with seed purity reaching 96%. These achievements highlight the transformative impact of modern biotechnology on agriculture.