Adverse effects of microplastics on the growth, photosynthesis, and astaxanthin synthesis of Haematococcus pluvialis.

Due to the widespread pollution, microplastics (MPs) have garnered increasing attention. Research has shown that MPs negatively affect many organisms. Microalgae are primary producers in aquatic environments and play a crucial role in the stability of aquatic ecosystems.

Spatiotemporal variations and impact factors of nutrients in the Sanya Bay, northern South China Sea.

Nutrients play a fundamental role in maintaining coastal ecosystem stability. Based on two cruise observations in the winter of 2020 and the summer of 2021, the spatiotemporal variations of dissolved inorganic nitrogen (DIN) and orthophosphate (PO) and their influencing factors in Sanya Bay were analyzed. Results show that the mean DIN concentrations in the bay are 2.

An empirical analysis of double reduction education policy based on public psychology.

To effectively reduce the homework burden and off-campus training burden of students in the compulsory education stage in China, China adopts the double reduction policy to carry out corresponding governance in the field of education. This study aims to explore the public's psychological cognition of the current education system under the implementation of the double reduction policy. The public's opinion data on education concepts under the implementation of the double reduction policy are collected, then the SPSS software and Amos software to quantitatively analyze the public's educational concept data are used, and a corresponding structural model equation to analyze the public's opinion on the implementation of the double reduction policy is established.

Fetal ECG extraction using short time Fourier transform and generative adversarial networks.

Fetal ECG (FECG) plays an important role in fetal monitoring. However, the abdominal ECG (AECG) recorded at the maternal abdomen is affected by various noises, making the extraction of FECG a challenging task. The main objective is to present a novel approach to FECG extraction using short time Fourier transform (STFT) and generative adversarial networks (GAN).

Qualitative and quantitative assessment of genotoxins using lysis reporter under the control of a newly designed SOS responsive promoter in .

A new bacterial genotoxicity detection strain was constructed, in which the cell lysis gene of from a lambda phage was controlled by a new designed SOS responsive element, designated as BL21/pUC-PST. The biosensor responded only after 0.5 h contact with mutagens and the changes in cell culture turbidity could be easily differentiated with the naked eyes from the control sample.

[Prokaryotic expression of HPV 16L1 and optimization of expression conditions].

Objective: To construct the HPV16 L1 prokaryotic expression plasmid and to optimize its expression.

Methods: A pair of primers was designed according to plasmid sequences of pGEX-KG and the HPV16L1 genes published by GeneBank. The DNA fragment of 1500 bp was amplified by PCR from the HPV recombinant plasmid with HPV16L1 gene, then cloned into pGEX-KG and transformed into the host E.