Amoxicillin (AMX) is a highly antibiotic resistance so that many studies focus on the removal of AMX in water environment. The present study investigated adsorptive removal of beta-lactam antibiotic AMX using a cationic surfactant, cetyltrimethylamonium bromide (CTAB) modified nanosilica (CMNS). The CTAB adsorption on nanosilica was independent of ionic strength, indicating that both electrostatic and hydrophobic interaction induced adsorption. Effective conditions for AMX removal using CMNS were systematically studied. The AMX removal using 10 mg/ mL CMNS reached 99 % at pH 9. Adsorption isotherms of AMX on CMNS at two salt concentrations were in good agreement with Langmuir model than Freundlich model. Adsorption isotherms at different ionic strengths and the surface modification by Fourier transform infrared (FT-IR) spectroscopy demonstrate that AMX adsorption on CMNS was mainly controlled by electrostatic interaction.

The paper examines the impact of the government's financial support policy on technological innovation decisions in 150 small and medium enterprises (SMEs) in Ho Chi Minh City. The study uses the Binary logistic model to quantify the influence of the government’s financial support policies on the decision to innovate technology of enterprises. The survey was collected directly from 150 small and medium sized enterprises in 6 districts of Ho Chi Minh City. Research results show that the government's financial support policy has a positive impact on the enterprises’ technological innovation decisions. However, this policy is not effective at high-grossing enterprises. Additionally, the technological innovation decisions are affected by other factors, including the operating time and the volumn of the enterprise, and the market competitiveness. The research findings propose suggestions to improve the effectiveness of this policy on technological innovation decisions in SMEs.

Species of the genus Elsholtzia have great potential for bioactive substances. Although this species has been used a lot in traditional medicines, most of it is only used based on the experience gained or left by forerunners without much knowledge of the species scientific basis. Therefore, the investigation, research, evaluation of chemical composition and screening of potential bioactive substances from plants of the genus Elsholtzia, especially those endemic to Vietnam, will be of great scientific and practical significance, actively contributing to the rational exploitation and use of the country's natural resources, thereby orienting the application of Elsholtzia essential oil in research and develops a number of food, pharmaceutical and cosmetic products. Using the method of extracting essential oils by steam distillation and the evaluation of antibacterial activity by agar diffusion method with the following contents: Results analysis, evaluation and screening of essential oils of some species of the genus Elsholtzia with biological activity obtained in different regions. Research results on mixing ratio to create antibacterial hand sanitizer products, completing the process and calculating the cost of antibacterial hand sanitizer products.