Mirror QCD phase transition as the origin of the nanohertz Stochastic Gravitational-Wave Background.

Several Pulsar Timing Array (PTA) Collaborations have recently provided strong evidence for a nHz Stochastic Gravitational-Wave Background (SGWB). Here we investigate the implications of a first-order phase transition occurring within the early Universe's dark quantum chromodynamics epoch, specifically within the framework of the mirror twin Higgs dark sector model. Our analysis indicates a distinguishable SGWB signal originating from this phase transition, which can explain the measurements obtained by PTAs.

A segmentation model to detect cevical lesions based on machine learning of colposcopic images.

Background: Semantic segmentation is crucial in medical image diagnosis. Traditional deep convolutional neural networks excel in image classification and object detection but fall short in segmentation tasks. Enhancing the accuracy and efficiency of detecting high-level cervical lesions and invasive cancer poses a primary challenge in segmentation model development.

Postnatal weight gain in very low birth weight infants in Beijing and the risk of retinopathy of prematurity.

Aim: To analyze the low weight gain (WG) from birth to 4 and 6wk of life to predict the development of retinopathy of prematurity (ROP) among very low birth weight (VLBW) preterm babies.

Methods: Three hundred and three newborns with VLBW were analyzed. Body weight measurements were recorded weekly.

Birth weight and gestational age on retinopathy of prematurity in discordant twins in China.

Aim: To assess the relative effect of birth weight and gestational age on retinopathy of prematurity (ROP) using preterm twin pairs discordant for birth weigh in a tertiary neonatal intensive care unit in China.

Methods: Fifty-six discordant twin pairs of 112 preterm infants were retrospectively analyzed. The twin pairs were divided into two subgroups based on birth weight in each pair.

Dose-dependent protective effect of lithium chloride on retinal ganglion cells is interrelated with an upregulated intraretinal BDNF after optic nerve transection in adult rats.

Neuroprotection of lithium for axotomized retinal ganglion cells (RGCs) is attributed to upregulated intraretinal Bcl-2. As lithium also upregulates brain-derived neurotrophic factor (BDNF) which can rescue axotomized RGCs, it is hypothesized that lithium could protect RGCs through BDNF. This study investigated this hypothesis and a possible relationship between the dose and protection of lithium.

[Retinopathy of prematurity screening in 2185 premature infants].

Objective: To determine the incidence and risk factors of retinopathy of prematurity (ROP) among premature infants.

Methods: The fundus examination data of 2185 cases of premature infants [birth body weight ≤ 2000 g or gestational age (GA) ≤ 34 weeks] in neonatal intensive care unit of Bayi Children's Hospitals in Beijing between January 2009 and December 2010 were collected and retrospectively analyzed.

Results: Of 2185 cases of premature infants (1571 had used supplemental oxygen) received RetCam-II ophthalmoscopy screening, 287 cases developed ROP with the incidence of 13.

Analysis of the optical quality by determining the modulation transfer function for anterior corneal surface in myopes.

Aim: To describe the characteristics of modulation transfer function (MTF) of anterior corneal surface, and obtain the the normal reference range of MTF at different spatial frequencies and optical zones of the anterior corneal surface in myopes.

Methods: Four hundred eyes from 200 patients were examined under SIRIUS corneal topography system. Phoenis analysis software was applied to simulate the MTF curves of anterior corneal surface at vertical and horizontal meridians at the 3, 4, 5, 6, 7mm optical zones of cornea.

Comparison of wavefront aberrations under cycloplegic, scotopic and photopic conditions using WaveScan.

Purpose: To evaluate the differences of wavefront aberrations under cycloplegic, scotopic and photopic conditions.

Methods: A total of 174 eyes of 105 patients were measured using the wavefront sensor (WaveScan® 3.62) under different pupil conditions: cycloplegic 8.

[The neuroglobin expression when retinal ganglion cells death in acute rats' retina ischemia].

Objective: To investigate the intra-retinal expression of neuroglobin (Ngb) and death of retinal ganglion cells (RGCs) in acute retina ischemia rats.

Methods: It was an experimental study. The acute retina ischemia model was established by specific hypothesised left retina artery of Sprague-Dawley rats.

[Optimization of antibiotics in combination].

Objective: To evaluate the antibacterial activity of Ciprofloxacin, Amikacin in combination with beta-lactams against Pseudomonas aeruginosa strains in vitro, to optimize treatment regime for antibiotics on the basis of pharmacokinetics (PK)/pharmacodynamics (PD) and drug sensitivity tests. Methods With checkerboard titration method, the minimal inhibitory concentrations (MIC) of a combination of antibiotics in different concentrations for 33 clinically isolated Pseudomonas aeruginosa strains were determined by broth dilution. Fractional inhibitory concentrations (FIC) were calculated for judging synergic effect of antibiotics.

Effects of inosine on axonal regeneration of axotomized retinal ganglion cells in adult rats.

Damage to the central nervous system (CNS) is always followed by an irreversible axon degeneration of injured neurons. The purine nucleoside inosine has been shown to induce neurons to regenerate axons in culture and in vivo. In the present study, we investigated the in vivo effects of inosine on the axon regeneration of axotomized retinal ganglion cells (RGCs) in adult rats, using the model of peripheral nerve (PN) grafting onto the ocular stump of the transected optic nerve.