Microplastics pollution has received growing attention worldwide in recent years. However, data on microplastics in the freshwater environment are still limited, especially in high-latitude nature reserves in Northern China. The first study on microplastic pollution in the Liaohe River Reserve in Northern China is reported here, and mesoplastics were also incorporated. Surface water and sediment samples were collected from 32 sites along the nature reserve. The abundance, type, shape, color, and size of micro-and mesoplastics were measured using density extraction, optical microscopy, and FTIR spectroscopy. The data showed that diverse micro-and mesoplastics were found widespread in the 32 sites, and the average abundance of these plastics was 0.11AE0.04 10 -2 items/L in surface water and 62.29AE54.30 items/kg in sediment. Moreover, 70% and 66% were smaller than 2000 μm in surface water and sediment, respectively. Fiber accounted for 91.86% in surface water and 43.48% in sediment, indicating that the major source of micro-and mesoplastics in the Liaohe River Reserve may be domestic sewage and aquaculture. A total of 16 and 27 polymers were identified in surface water and sediment, respectively, and mostly consisted of rayon, polyester, polystyrene, and poly(ethylene terephthalate). Moreover, both the risk index and the pollution load index demonstrated a low risk of micro-and mesoplastics in surface water and sediment in the Liaohe River Reserve.

The historical theory column "History and Culture" of Journal of Silk is unique in the textile and costume journal industry. Many famous scholars in history and nowadays have written papers on this column. The phased research on the column will help us clarify the academic history and important figures of textile and costume history. Based on the relevant statistics of Journal of Silk, the research concludes that: ① The name change of historical theory column in Journal of Silk reflects the determination of Journal of Silk whose historical theory column starts from the history of silk and finally extends to the entire history of textile culture and textile technology. ② The research on clothing history in Journal of Silk can be divided into four periods. 1977-1986 is the budding period, 1987-2003 is the hovering period, 2004-2014 is the stable period, and 2015 is the accelerated development period. ③ The factors of this stage are closely related to the amount of papers published. The changes in the amount of papers published in the previous period are closely related to politics. With the deepening of economic reforms, it is closely related to the reform and development of the textile industry and the development of universities.

After the reissue of Journal of Silk, the historical papers published can reflect the academic history of Chinese Textile and Apparel History research. The mathematical analysis of these papers is helpful to clarify the territory and important towns of the research on Chinese Textile and Apparel History. Through literature collation and mathematical analysis, the paper believes that: ① The changes in the types of historical papers in Journal of Silk, especially the decline in the amount of papers published by corporate personnel, indicate that the Journal has transformed from a journal that integrates education, academia, and training into an academic publication. ② For a long time, authors from Zhejiang and Jiangsu have published more than half of the papers. This phenomenon is related to the earliest research on historical theory in the two places, especially the Zhejiang Silk Institute of Technology, which was the first organization to engage in professional research on historical theory in China. ③ Authors in Zhejiang Province had the largest number of papers before 2003. But after 2004, authors in Jiangsu had the largest number of papers. And after 2004, authors in Shanghai had more papers published, which is related to the strengthening of relevant majors by Suzhou University, Jiangnan University and Donghua University. At the same time, the experience of Jiangnan University shows that restricting the graduation conditions for master's students is conducive to research in the field of Historical Theory.

With the morphological characters, anatomy and molecular biology research, 29 entomopathogenic nematodes populations isolated from Gansu province were identified and the resoult showed that they were 8 species of EPN, Steinernema feltiae,Steinernema bicornutum,Steinernema affin,Steinernema krusse and Steinernema karil were belong to Steinernema while Heterorhabditis brevicaudis,Heterorhabditis megidi and Heterorhabditis marelatu were belong to Heterorhabditis respectively. And what more research found that S. affin,S. krusse,S. karil and H. marelatu were new species in China.