[Variational Trend and Characteristics of Air Pollution in Baoding City].

To understand the trends and characteristics of air pollution in Baoding in recent years, an analysis of air quality and air pollutant concentrations in Baoding from 2013 to 2018 was carried out. The results showed that: 1 from 2013 to 2018, the comprehensive index of Baoding dropped from 11.6 to 6.

Motivators for and Barriers to Exercise Rehabilitation in Hemodialysis Centers: A Multicenter Cross-Sectional Survey.

Objectives: The aim of the study was to explore motivators for and barriers to exercise rehabilitation in hemodialysis patients and the barriers perceived by the hemodialysis center staff.

Design: A cross-sectional study was performed in five hemodialysis centers using patient questionnaires designed for this study to evaluate the motivators for and barriers to exercise rehabilitation. Questionnaires were not yet validated.

Vascular smooth muscle cell apoptosis is an early trigger for hypothyroid atherosclerosis.

Aims: Endothelial dysfunction is an initial and vascular smooth muscle cell (VSMC) apoptosis, a later step of atherosclerosis. Hypothyroidism accelerates atherosclerosis. However, the early events responsible for this pro-atherosclerotic effect are unclear.

Heat-shock protein 70 is involved in hyperbaric oxygen preconditioning on decompression sickness in rats.

Decompression sickness (DCS) is a major concern in diving and space walk. Hyperbaric oxygen (HBO) preconditioning has been proved to enhance tolerance to DCS via nitric oxide. Heat-shock protein (HSP) 70 was also found to have protective effects against DCS.

Therapeutic effects of hydrogen saturated saline on rat diabetic model and insulin resistant model via reduction of oxidative stress.

Background: Molecular hydrogen, as a novel antioxidant, has been proven effective in treating many diseases. This study aimed to evaluate the therapeutic effects of hydrogen saturated saline in treatment of a rat model of diabetes mellitus and a rat model of insulin resistant.

Methods: A rat diabetes mellitus model was established by feeding a high fat/high carbohydrate diet followed by injection of a small dose of streptozotocin, and an insulin resistant model was induced with a high glucose and high fat diet.

Combined effects of intravenous perfluorocarbon emulsion and oxygen breathing on decompression-induced spinal cord injury in rats.

The spinal cord is one of the most commonly affected sites in decompression sickness (DCS). Alternative methods have long been sought to protect against DCS spinal cord dysfunction, especially when hyperbaric treatment is unavailable. Use of perfluorocarbon (PFC) emulsion with or without oxygen breathing has shown survival benefits in DCS animal models.

Heme oxygenase-1 could mediate the protective effects of hyperbaric oxygen preconditioning against hepatic ischemia-reperfusion injury in rats.

1. Heme oxygenase 1 (HO-1) has been shown to play a pivotal role in the maintenance of cellular homeostasis when the liver undergoes sublethal stress, such as ischaemia-reperfusion (I/R) injury. In the present study, we investigated the protective role of HO-1 in hyperbaric oxygen (HBO) preconditioning against liver injury after I/R.

Protective effect of hydrogen-rich saline on decompression sickness in rats.

Introduction: Hydrogen (H2) has been reported to be effective in the treatment of oxidative injury, which plays an important role in the process of decompression sickness (DCS). This study was designed to test whether H2-rich saline (saline saturated with molecular hydrogen) protected rats against DCS.

Methods: Models of DCS were induced in male Sprague-Dawley rats weighing 300-310 g.

Hyperbaric oxygen preconditioning reduces the incidence of decompression sickness in rats via nitric oxide.

Divers are at risk of decompression sickness (DCS) when the ambient pressure decrease exceeds a critical threshold. Hyperbaric oxygen (HBO2) preconditioning has been used to prevent various injuries, but the protective effect on DCS has not been well explored. To investigate the prophylactic effect of HBO2 on DCS, rats were pretreated with HBO2 (250 kPa-60 minutes) (all the pressures described here are absolute pressure) for 18 hours before a simulated air dive (700 kPa-100 minutes) with fast decompression to the surface at the rate of 200 kPa/min (n=33).

Mechanism of ischemic tolerance induced by hyperbaric oxygen preconditioning involves upregulation of hypoxia-inducible factor-1alpha and erythropoietin in rats.

We studied the effect of hyperbaric oxygen (HBO) preconditioning on the molecular mechanisms of neuroprotection in a rat focal cerebral ischemic model. Seventy-two male Sprague-Dawley rats were pretreated with HBO (100% O(2), 2 atmospheres absolute, 1 h once every other day for 5 sessions) or with room air. In experiment 1, HBO-preconditioned rats and matched room air controls were subjected to focal cerebral ischemia or sham surgery.

Therapeutic effects of hyperbaric oxygen in a rat model of endothelin-1-induced focal cerebral ischemia.

It has been established that hyperbaric oxygen (HBO) treatment reduces brain edema, decreases infarct volume, contributes to neurological functional recovery and suppresses apoptosis in suture-induced focal cerebral ischemic animal models. In the present study, we evaluated the therapeutic effect of HBO in an endothelin-1-induced focal cerebral ischemia in rats and explored the associated mechanisms of HBO-induced brain protection. One hundred twenty male Sprague-Dawley rats (280 to 320 g) were randomly assigned to sham, focal cerebral ischemia and focal cerebral ischemia treated with HBO groups.

[Resonance light scattering of rhodamine B].

The characteristic and mechanism of resonance light scattering (RLS) of Rhodamine B (RhB) were studied. In acidic solutions with pH from -0.38 to 4.

[Resonance light scattering of aurintricarboxylic acid].

Resonance light scattering (RLS), absorption and fluorescence spectra of aurintricarboxylic acid (ATA) were studied. In solutions with pH 3.7 to pH 11.