Streptomycin used in human and veterinary medicine is released into the environment mainly through excretions. As such, its elimination in water should be investigated to control pollution. In this study, the degradation of streptomycin in water was studied, and the influence of variables, including light exposure, solution pH, temperature, ionic strength, dissolved organic matter (DOM), and coexisting surfactants, on degradation was investigated. Streptomycin degradation was consistent with the first-order model in aquatic environments. Its degradation rate under light exposure was 2.6-fold faster than that in the dark. Streptomycin was stable under neutral conditions, but it was easily decomposed in acidic and basic environments. Streptomycin degradation was enhanced by high temperature, and its half-life decreased from 103.4 days at 15 °C to 30.9 days at 40 °C. This process was also accelerated by the presence of Ca and slightly improved by the addition of HA. Streptomycin degradation was suppressed by high levels of the cationic surfactant cetyltri- methylammonium bromide (CTAB), but was promoted by the anionic surfactant sodium dodecyl benzene sulfonate (SDBS). The main degradation intermediates/products were identified through liquid chromatography-mass spectrometry, and the possible degradation pathway was proposed. The antibacterial activity of streptomycin solution was also determined during degradation. Results showed that STR degradation generated intermediates/products with weaker antibacterial activity than the parent compound.

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This study examines the significance, theoretical underpinnings, and associated doctrines of China's domestic labor compensation system. It also studies the domestic labor compensation systems of important foreign nations and draws inspiration from them to enhance China's system. Then, we examine the actual state of China's domestic labor compensation system, as well as its legislative shortcomings and root reasons, and offer workable legislative recommendations for enhancing it. The first section provides background information, discusses the topic's relevance to daily life, and highlights the opinions of some domestic and international intellectuals on the domestic labor compensation system using examples from various works of literature. In the second section, the system is described, the ideas are sorted out, the many philosophies of the domestic labor compensation system are examined, and the importance of creating a perfect domestic work compensation system is briefly discussed. The third section examines the domestic labor compensation systems of significant foreign nations and takes inspiration from them in order to improve the system. The fourth section examines the flaws in the application procedure and addresses the reasons why domestic employment in China is imperfect, using the actual remuneration for domestic work in China as a starting point. The fifth section elaborates legislative solutions to address the shortcomings of China's