'After preservation treatment, a herring can be stored for over 10 times the traditional 4℃ refrigeration period, reaching up to 70 days.' Professor Wan Jinqing and his team from Shanghai Ocean University have developed the 'new technology of non-freezing preservation for food at 0℃ to -4℃' after 20 years of painstaking research, which has become one of the exhibits in the university section of the China International Industry Fair. The 22nd China International Industry Fair will be held from today to the 19th at the 'Four Leaves Clover' National Exhibition and Convention Center (Shanghai). There are many technological innovations closely related to people's healthy life in the university section.

 Half an hour to detect toxic substances in the air

 'Even if the PM2.5 values of two cities are the same, the toxicity of their air to the human body can vary greatly,' emphasized Chen Jianmin, a professor of environmental science and engineering at Fudan University. The PM2.5 index cannot directly reflect the biological toxicity of the air, as the composition of particulate matter varies, and its toxicity may differ significantly. In fact, what is truly toxic to the human body are only a small amount of organic compounds such as polycyclic aromatic hydrocarbons and substances such as heavy metals, which have teratogenic and carcinogenic effects. If existing laboratory methods are used to sample and detect pollutants, it takes several days to obtain results.

 In order to quickly and accurately assess the biological toxicity of air, Chen Jianmin's team spent 5 years developing an AI-enabled multifunctional aerosol concentration enrichment system combined with an atmospheric particulate matter toxicity detection instrument. This domestically developed equipment consists of three major modules: PM2.5 collection and eluate preparation module, chemical composition analysis, and toxicity detection module, enabling online real-time intelligent broadcasting of the biological toxicity of atmospheric particulate matter within 30 minutes. According to reports, the team conducted thousands of experiments just to achieve a 90% overall collection efficiency for particles of different sizes. To efficiently complete the complex process of toxicity detection, the team also collaborated with enterprises to design a robotic arm to grab pipettes and flexibly complete various reagent addition steps. Currently, this combined instrument has applied for 12 Chinese invention patents and 1 US invention patent.

 The intelligent diagnostic device that replaces B-mode ultrasound is here

 In the past, doctors would judge where there might be lesions based on the images displayed on the screen after scanning with a B-mode ultrasound instrument, and then suggest patients undergo tissue biopsy to confirm whether there were indeed lesions. 'With the multimodal photoacoustic molecular imaging and tumor diagnosis system, everything has changed,' said Cheng Qian, a professor at Tongji University, who exhibited this system at this year's Industrial Expo.

 In this project, 'multimodal' refers to the use of three biometric technologies: ultrasound, photoacoustic imaging, and photoacoustic spectroscopy, to explore, identify, and diagnose tumors. Currently, conventional tumor diagnosis relies on 'inspection' of body tissues using ultrasound and other methods to detect targets. Multimodal photoacoustic molecular imaging technology obtains information about the size, distance, and current status of various organs based on the delay time and intensity patterns of the monitored echoes, thereby detecting suspicious changes in large molecules such as hemoglobin, collagen, and lipids in the body. Then, experienced doctors can use pathology and clinical medicine to determine whether there is a lesion and the extent of functional impairment. 'The judgment made by B-mode ultrasound is 'there may be a tumor,' while the intelligent diagnostic instrument can distinguish more detailed information, such as determining whether the tumor is malignant, its current condition, and which area is the worst,' Cheng Qian explained. Because multimodal photoacoustic molecular imaging and tumor diagnosis systems not only use ultrasound imaging but also employ laser irradiation to excite large molecules in the body to 'move,' the 'movement' information is transmitted through sound waves, obtaining rich data through multiple channels.

 Currently, Cheng Qian's team has partnered with Tongji Hospital affiliated to Tongji University, Shanghai Dermatology Hospital, Xinhua Hospital, Ruijin Hospital, etc., to conduct applied research in spinal, cranial, oncology, dermatology, hematology, and other fields. (Reporter: Li Lei)

Article source: Jiefang Daily (http://sh.xinhuanet.com/2020-09/15/c_139368616.htm)