[Water-soluble Inorganic Ion Content of PM and Its Change Characteristics in Urban Area of Beijing in 2022].

To explore the content and variation characteristics of water-soluble ions of atmospheric fine particles (PM) in a Beijing urban area and put forward the pollution prevention and control scheme, the water-soluble ions, gaseous precursors (SO, NO), and meteorological factors (temperature, RH) of PM in 2022 were analyzed and determined. The results showed that the water-soluble ions with the highest proportion in PM in the Beijing City urban area were NO, NH, and SO, accounting for 52.7% of PM.

[Analysis of the Jumping Characteristics and Influencing Factors of Ozone Pollution in Beijing].

Based on environmental monitoring data and meteorological observation data from 2016 to 2022 in Beijing, combined with backward trajectory clustering and potential source area contribution analysis, the characteristics, meteorological impacts, and potential source areas of ozone (O) pollution were analyzed. The results showed that there was a total of 41 O pollution processes with jumping characteristics in Beijing from 2016 to 2022, with an average of 5.9 times a year.

[Characteristics and Source Apportionment of VOCs Initial Mixing Ratio in Beijing During Summer].

To clarify the characteristics and source apportionment of the VOCs initial mixing ratio in Beijing in summer, continuous monitoring of VOCs was conducted in the Beijing urban area from May to August 2022, and the initial mixing ratio was calculated using the photochemical ratio method. The results showed that:① during the study period, initial (TVOCs) in the Beijing urban area were (30.0 ±11.

Ablative strategies for recurrent hepatocellular carcinoma.

Hepatocellular carcinoma (HCC) is the most common primary liver cancer and is the fifth leading cause of cancer death worldwide and the third leading cause of all diseases worldwide. Liver transplantation, surgical resection and ablation are the three main curative treatments for HCC. Liver transplantation is the optimal treatment option for HCC, but its usage is limited by the shortage of liver sources.

[Pollution Characteristics and Factors Influencing the Reduction in Ambient PM in Beijing from 2018 to 2020].

Air quality data from 33 environment sites and five regional sites from 2018 to 2020, as well as meteorological data, were used to research PM variation,spatial and temporal change, diurnal variation, and heavy pollutions in Beijing. The annual average mass concentrations of PM in Beijing were 51, 42, and 38 μg·m, which showed great progress in air quality improvement. However, the PM concentration in 2020 was still 8.

[Characteristics and Sources of PM and Its Light-scattering Properties with Different Chemical Compositions in Urban Area of Beijing].

In recent years, the concentration of PM in the Beijing urban area has decreased with the increase in the proportion of secondary inorganic ions. In order to explore the characteristics and sources of the light scattering of PM with different chemical compositions, PM with its chemical components and scattering coefficient were continuously measured at hourly resolution in the Beijing urban area from December 2020 to November 2021. The components, scattering characteristics, and sources of PM were analyzed.

[Analysis of Pollution Characteristics and Sources of Rainfall Runoff from Roofs in the Central District of Beijing].

The rainwater and rainfall runoff of roofs in the central district of Beijing from June to September in 2019 were sampled and analyzed to study the characteristics of the water quality, the first flush effect, and the main influential factors and sources of pollutants. The results showed that the roof runoff was seriously polluted by total nitrogen, ammonia nitrogen, chemical oxygen demand, and total suspended solids whose event mean concentration (EMC) exceeded the fifth level of environmental quality standards for surface water (GB 3838-2002) (the EMC of suspended solids exceeded the second level of discharge standard of pollutants for municipal wastewater treatment plants (GB 18918-2002)). The rainwater was relatively less polluted than the rainfall runoff, but the EMC of ammonia nitrogen and total nitrogen of the rainwater also exceeded the standard in some rainfall events.

Treatment strategies for hepatocellular carcinoma with extrahepatic metastasis.

Extrahepatic metastasis (EHM) of hepatocellular carcinoma (HCC) has increasingly been seen due to improved survival with effective management of intrahepatic lesions. The presence of EHM indicates an advanced stage of HCC, for which systemic therapy serves as the standard treatment modality. Since the approval of Sorafenib as the first systemic agent in 2007, it took almost a decade to show its efficacy in both first and further lines of setting until the landscape of systemic drugs was finally expanded.

The Prognosis of Type III Biliary Atresia with Hilar Cyst.

Objective: To compare the outcome of biliary atresia (BA) patients with and without hilar cyst on preoperative ultrasound.

Methods: A single center retrospective review of patients of BA with (n = 27) and without hilar cyst (n = 27) over a 5 y period was done. The patients were analyzed using propensity score matching to reduce selection bias.

Multiple-Electrode Switching-Based Radiofrequency Ablation vs. Conventional Radiofrequency Ablation for Single Early-Stage Hepatocellular Carcinoma Ranging From 2 to 5 Cm.

To retrospectively compare the treatment outcome of multiple-electrode switching-based radiofrequency ablation (switching RFA) and the conventional RFA for early-stage hepatocellular carcinoma (HCC). A total of 122 patients with single early-stage HCC ranging from 2.1 to 5.

Supramolecular Photothermal Nanomedicine Mediated Distant Tumor Inhibition via PD-1 and TIM-3 Blockage.

Supramolecular nanoparticles for photothermal therapy (PTT) have shown promising therapeutic efficacy in the primary tumor and great potential for turning the whole-body immune microenvironment from "cold" to "hot," which allows for the simultaneous treatment of the primary tumor and the metastatic site. In this work, we develop a liposome-based PTT nanoparticle through the self-assembly of FDA-approved intravenous injectable lipids and a photothermal agent, indocyanine green (ICG). The obtained ICG-liposome shows long-term storage stability, high ICG encapsulation efficiency (>95%), and enhanced near-infrared (NIR) light-triggered photothermal reaction both and .

Preoperative prediction of tumour deposits in rectal cancer by an artificial neural network-based US radiomics model.

Objective: To develop a machine learning-based ultrasound (US) radiomics model for predicting tumour deposits (TDs) preoperatively.

Methods: From December 2015 to December 2017, 127 patients with rectal cancer were prospectively enrolled and divided into training and validation sets. Endorectal ultrasound (ERUS) and shear-wave elastography (SWE) examinations were conducted for each patient.

[Temporal Variation, Spatial Distribution, and Reactivity Characteristics of Air VOCs in Beijing 2015].

In 2015, continuous volatile organic compound (VOC) monitoring was conducted for Dongsi (urban site), the southeast boundary site Yongledian, and Dingling (background site). The average annual mole fraction of atmospheric VOCs in urban areas was(48.93±31.

[Analysis of Atmospheric Particulate Matter Pollution Characteristics by LIDAR in Beijing During Spring Festival, 2016].

Real-time aerosol extinction retrieved by Micro-pulse LIDAR and concentrations of PM and PM in Beijing were analyzed to investigate the air quality during the Spring Festival. The results showed that fireworks on the New Year's Eve resulted in a sharp increase in particulate matter concentrations in a short time. The maximum concentration of PM at Guanyuan station was 639.

Real-Time Shear Wave Ultrasound Elastography Differentiates Fibrotic from Inflammatory Strictures in Patients with Crohn's Disease.

Background And Aim: The distinction of intestinal fibrosis from inflammation in Crohn's disease (CD) associated strictures has important therapeutic implications. Ultrasound elastography is useful in evaluating the degree of fibrosis in liver, but there is little evidence whether it can assess fibrosis in the bowel. We determined whether shear-wave elastography (SWE), a novel modification of elastography, quantifying tissue stiffness, could differentiate between inflammatory and fibrotic components in strictures of patients with CD.

[Pollution Characteristics of NH,NO,SO in PMand Their Precursor Gases During 2015 in an Urban Area of Beijing].

Simultaneous measurements of precursor gases NH,NO,NO,SO and the main water-soluble ions in PM such as sulphate (SO),nitrate (NO) and ammonium (NH) (collectively called SNA)were carried out in the urban area of Beijing during 2015-01 to 2015-12,which obtained 325 groups of samples. PTFE membrane filters were used to collect particulate NH, NO and SO, followed by the online instruments to collect precursor gases. The pollution characteristics of the precursor gases and SNA were analyzed and their correlation was studied.

Liver stiffness measurements with supersonic shear wave elastography in the diagnosis of biliary atresia: a comparative study with grey-scale US.

Objectives: To prospectively assess the diagnostic performance of supersonic shear wave elastography (SSWE) in identifying biliary atresia (BA) among infants with conjugated hyperbilirubinaemia by comparing this approach with grey-scale ultrasonography (US).

Methods: Forty infants were analysed as the control group to determine normal liver stiffness values. The use of SSWE values for identifying BA was investigated in 172 infants suspected of having BA, and results were compared with the results obtained by grey-scale US.

[Concentration Characteristics of PM in Beijing During Two Red Alert Periods].

Variations of PM concentrations and effects of pollution control measures during two red alert periods in 2015 in Beijing were analyzed based on atmospheric pollutant monitoring data. The results showed that during the first red alert, the highest hourly-averaged PM concentration occurred at 19:00 on 9th December with a value of 282 μg·m and the highest hourly PM concentration appeared at Yongledian station which is near the southeast border of Beijing, with the peak concentration of 496 μg·m. During the second red alert, the highest hourly-averaged concentration of PM occurred at 20:00 on 22th with a value of 421 μg·m.

Elastography of shear wave speed imaging for the evaluation of liver fibrosis: A meta-analysis.

Aim: A meta-analysis was carried out to assess the accuracies of shear wave speed imaging (SWSI) in predicting significant fibrosis (stages F2-4) and cirrhosis (stage F4).

Methods: A review was performed of relevant studies published until October 2015. A bivariate binomial model was used to combine the sensitivity, specificity, and the area under the summary receiver operating characteristic (AUC), and 95% confidence intervals were derived to indicate the diagnostic accuracy of imaging modalities.

[Air Quality Characteristics in Beijing During Spring Festival in 2015].

To analyze the impacts of emissions from fireworks on the air quality, monitoring data of PM2.5, PM10, SO2, NO2 chemical compositions of PM2.5 of automatic air quality stations in Beijing during Spring Festival(February 18th-24th) in 2015 were investigated.

[Chemical Species of PM2.5 in the Urban Area of Beijing].

From August 2012 to July 2013, 220 groups of PM2.5 samples were continuously collected at four locations in the urban area of Beijing (Shijingshan, Chegongzhuang, Dongsi, and Tongzhou), and the primary chemical species of PM2.5 were analysed by the chemical mass balance method.

Optimizing the US Diagnosis of Biliary Atresia with a Modified Triangular Cord Thickness and Gallbladder Classification.

Purpose To evaluate the diagnostic performance of ultrasonography (US) in the identification and exclusion of biliary atresia with a modified triangular cord thickness metric together with a gallbladder classification scheme, as well as hepatic artery (HA) diameter and liver and spleen size, in a large sample of jaundiced infants. Materials and Methods The ethics committee approved this study, and written informed parental consent was obtained. In 273 infants with conjugated hyperbilirubinemia (total bilirubin level ≥ 31.