ABSTRACT
Infectious diseases (such as Corona Virus Disease 2019) and tumors pose a tremendous challenge to global public health. Early diagnosis of infectious diseases and tumors can lead to effective control and early intervention of the patient's condition. Over the past few decades, carbon nanomaterials (CNs) have attracted widespread attention in different scientific disciplines. In the field of biomedicine, carbon nanotubes, graphene, carbon quantum dots and fullerenes have the ability of improving the accuracy of the diagnosis by the improvement of the diagnostic approaches. Therefore, this review highlights their applications in the diagnosis of infectious diseases and tumors over the past five years. Recent advances in the field of biosensing, bioimaging, and nucleic acid amplification by such CNs are introduced and discussed, emphasizing the importance of their unique properties in infectious disease and tumor diagnosis and the challenges and opportunities that exist for future clinical applications. Although the application of CNs in the diagnosis of several diseases is still at a beginning stage, biosensors, bioimaging technologies and nucleic acid amplification technologies built on CNs represent a new generation of promising diagnostic tools that further support their potential application in infectious disease and tumor diagnosis.
ABSTRACT
In recent years, the import of aquatic products at Zhanjiang port has continued to increase, which has effectively promoted the development of the local economy. However, unqualified imported aquatic products have occurred from time to time, and it has always been an important duty of the customs to control the safety of imported food. Especially with the continuous outbreak of novel coronavirus pneumonia epidemic situation since 2020, it is particularly important to ensure the quality and safety of imported aquatic products, especially the traceability of the products. This article focused on analyzing the characteristics and functions of blockchain technology, combining with the problems of traceability of imported aquatic products in Zhanjiang, combined blockchain technology with three-dimensional customs supervision, explored the establishment of customs blockchain supervision model, and analyzed and studied the feasibility of the application of blockchain in the traceability of imported aquatic products in Zhanjiang. The traceability supervision system including production enterprises, importers and exporters, third-party institutions, logistics, warehousing, banking, insurance and other stakeholders was constructed. Finally, relevant application exploration schemes were put forward, and it was expected to provide some reference for improving the quality of imported products and perfecting the construction of imported food safety traceability management system.
ABSTRACT
In recent years, the import of aquatic products in China has maintained a rapid development. The outbreak of the novel coronavirus pneumonia in the world in 2020 has brought a great impact on the import of aquatic products. This paper analyzed the global consumption and trade of aquatic products, studied China's imported products in 2020 from the aspects of import types, trading countries and trade modes, and analyzed that China's imported products had the characteristics of high quality and low price, large market potential, obvious decline in processing trade in the second half of the year affected by the new crown, and from the aspects of blocked transportation, decline in global output under the influence of public opinion, consumers' consumption had decreased, restrictive measures had been taken in some regions, corporate profits had been declining, the advantages of processing trade were no longer available, and the ability to cope with market changes was poor. Finally, we would conduct in-depth research on the reasons for the decline of China's imported aquatic products from the aspects of transmitting responsibility pressure to key national competent departments, strengthening the inspection and quarantine supervision of imported aquatic products strengthen self construction, provided technical support and guarantee, gave full play to the role of industry associations, expanded the import of high-quality aquatic products, promoted the increase of domestic aquaculture production, guided enterprises to explore the domestic market and make up for market vacancies, so as to provide some reference for meeting the people's good life needs and stabilizing market supply.