The influence of maternal gestational weight gain on adverse perinatal outcomes.

Objective: To analyze the impact of maternal gestational weight gain (GWG) on adverse outcomes for mothers and infants.

Methods: A retrospective analysis was conducted, collecting relevant information on 9,058 singleton pregnancies and newborns from prenatal check-ups and deliveries at Guangdong Women and Children Hospital from 2017 to 2022. The subjects were grouped according to different GWG, and logistic regression was used to analyze the impact of GWG on adverse outcomes, including hypertensive disorders of pregnancy (HDP), gestational diabetes mellitus (GDM), large-for-gestational-age infants (LGA), small-for-gestational-age infants (SGA), and preterm births.

The correlation of bisphenol A exposure on inflammatory cytokines in preschool children.

Objective: Based on current evidence suggesting that bisphenol A (BPA) may contribute to obesity through the modulation of inflammatory markers, this study aims to investigate the correlation between BPA exposure and cellular inflammatory factors in preschool children.

Methods: A total of 155 preschool children aged 4-6 years were included. Urine and blood samples were collected.

Sensitively monitoring photodegradation process of organic dye molecules by surface-enhanced Raman spectroscopy based on Fe3O4@SiO2@TiO2@Ag particle.

Photodegradation of organic dye molecules has attracted extensive attention because of their high toxicity to water resources. Compared with traditional UV-visible spectroscopy, SERS technology can reflect more sensitively the catalytic degradation process occurring on the surface of the catalysts. In this paper, we report the synthesis and structure of Fe3O4@SiO2@TiO2@Ag composite, which integrates SERS active Ag nanostructure with catalytically active titania.

Monitoring plasmon-driven surface catalyzed reactions in situ using time-dependent surface-enhanced Raman spectroscopy on single particles of hierarchical peony-like silver microflowers.

Investigating the kinetics of catalytic reactions with surface-enhanced Raman scattering (SERS) on a single particle remains a significant challenge. In this study, the single particle of the constructed hierarchical peony-like silver microflowers (SMFs) with highly roughened surface led to the coupling of high catalytic activity with a strong SERS effect, which acts as an excellent bifunctional platform for in situ monitoring of surface catalytic reactions. The kinetics of the reaction of 4-nitrothiophenol (4-NTP) dimerizing into 4,4'-dimercaptoazobenzene (DMAB) was investigated and comparatively studied by using the SERS technique on a single particle of different morphologies of SMFs.

Highly sensitive in situ monitoring of catalytic reactions by surface enhancement Raman spectroscopy on multifunctional Fe₃O₄/C/Au NPs.

In this study, multifunctional Fe₃O₄/C/Au nanoparticles (NPs), which catalytically integrated active small Au NPs with surface-enhanced Raman scattering (SERS) active large Au NPs, were fabricated via a facile method and employed for the in situ SERS monitoring of a catalytic reaction of p-nitrothiophenol (p-NTP) to p-aminothiophenol (p-ATP). In addition, the effect of magnet power was tested and it was demonstrated that the SERS intensity of the reaction system was stronger, and the reaction proceeded more smoothly because more hot spots existed and remained the same in the magnetic field; hence, the catalytic rate could be determined.

Highly uniform and optical visualization of SERS substrate for pesticide analysis based on Au nanoparticles grafted on dendritic α-Fe2O3.

Here, Au nanoparticles (NPs) grafted on dendritic α-Fe2O3 (NPGDF) are designed as a highly uniform surface-enhanced Raman scattering (SERS) substrate with a feature of optical visualization by an optical microscope (OM) system and used for in situ detection of pesticide residues that are annually used in agriculture. With this strategy, the dendritic α-Fe2O3 has been synthesized by a hydrothermal method and significantly functionalized by an inductively coupled plasma (ICP) apparatus and then Au NPs were grafted on it densely and uniformly. In addition, the profile of NPGDF can be clearly observed using an OM platform of a Raman spectrometer, and the profile of SERS spectral mapping with NPGDF as substrate almost exactly coincides with the OM image, the electron microscope (EM) image and the elemental mapping of NPGDF, which indicates remarkable uniformity of the NPGDF as SERS substrate, thus ensuring the laser beam focuses on the efficient sites of the substrate under the OM platform.