Trajectory of breastfeeding among Chinese women and risk prediction models based on machine learning: a cohort study.

Background: Breastfeeding is the optimal source of nutrition for infants and young children, essential for their healthy growth and development. However, a gap in cohort studies tracking breastfeeding up to six months postpartum may lead caregivers to miss critical intervention opportunities.

Methods: This study conducted a three-wave prospective cohort analysis to examine maternal breastfeeding trajectories within the first six months postpartum and to develop risk prediction models for each period using advanced machine learning algorithms.

A novel PVDF-TiO@g-CN composite electrospun fiber for efficient photocatalytic degradation of tetracycline under visible light irradiation.

A novel composite electrospun fiber with high photocatalytic efficiency, good stability, strong hydrophobicity, good pollution resistance, and easy separation and recovery was synthesized. The TiO@g-CN (TCN) with special core-shell structure (5-10 nm shell) facilitated the separation of photogenerated electron-holes and had high photocatalytic performance. The poly (vinylidene fluoride) (PVDF) electrospun fiber immobilized with TCN was successfully fabricated (PVDF-TCN) with uniform distribution and size of nanofibers by using electrospinning, which was used for degrading tetracycline under visible-light irradiation (> 400 nm).

The influence of variables on the bioavailability of heavy metals during the anaerobic digestion of swine manure.

The speciation of heavy metals, besides the total concentrations, urgently need to be considered when assessing the eco-toxicity and the bioavailability of heavy metals in environment. This paper aims to investigate the distribution and chemical speciation (e.g.

The optical lens coupled X-ray in-line phase contrast imaging system for the characterization of low Z materials.

Due to the high spatial resolution and contrast, the optical lens coupled X-ray in-line phase contrast imaging system with the secondary optical magnification is more suitable for the characterization of the low Z materials. The influence of the source to object distance and the object to scintillator distance on the image resolution and contrast is studied experimentally. A phase correlation algorithm is used for the image mosaic of a serial of X-ray phase contrast images acquired with high resolution, the resulting resolution is less than 1.

[Quantitative analysis of the concentration of Br-doping in micro-shell coating with XRF].

In inertial confinement fusion (ICF) physics experiment, the micro-shell that contains Br-doped CH coating must be characterized for doping Br concentration level. X-ray fluorescence (XRF), with its unique capability to quantitatively determine concentrations of most elements simultaneously and non-destructively, is generally the method of choice for total dopant (Z > 11) concentration. In the present paper, a method to determine the dopant concentration in ICF micro-shell coating with X-ray fluorescence spectrometry is described, and the calibration model is founded by the calculation of fluorescence intensity of film and micro-shell sample.

Preparation and characterization of planar deuterium cryotargets.

Using a planar-cryotarget system with the cooling power provided by a Gifford-McMahon cryocooler, the deuterium vapor is condensed to form liquid in a cylinder target cell. The liquefaction processes of deuterium are examined by the Mach-Zehnder interference and infrared spectra. The infrared-absorption spectra of deuterium show a strong absorption peak around 3040 nm at 19 K.