[A Review of Comparative Studies on Exposure Levels of Air Pollutants Among Different Modes of Transportation in China's Cities].

Urban traffic is closely related to the daily life of the public,and air pollution in the traffic microenvironment has become a public health problem that cannot be ignored.This paper reviews the comparative studies of air pollutant exposure levels among different modes of transportation in multiple cities in China.By comparing the exposure levels of pollutants among different modes of transportation,this paper provides a reference for protecting the health of the public in daily transportation and selecting targeted control measures.

[Research Status and Trend of Screening for Women's Common Diseases in China].

Objective To visualize the research status and hotspots of women's common disease screening based on CiteSpace 6.1.R6,and to provide a reference for the in-depth research in this field thereafter.

[Characteristics and Differences of Household Fine Particulate Matter Pollution Caused by Fuel Burning in Urban and Rural Areas in China].

Objective To explore the overall level,distribution characteristics,and differences in household fine particulate matter (PM) pollution caused by fuel burning in urban and rural areas in China. Methods The relevant articles published from 1991 to 2021 were retrieved and included in this study.The data including the average concentration of household PM and urban and rural areas were extracted,and the stoves and fuel types were reclassified.

[Receiving Human Immunodeficiency Virus Serostatus Disclosure from Male Sexual Partners and Related Factors among Men Who Have Sex with Men Aged 50 and Above].

Objective To investigate the rate and correlates of receiving human immunodeficiency virus(HIV) serostatus disclosure from their most recent male sexual partners among men who have sex with men(MSM) aged 50 and above. Methods With a geosocial networking application,we recruited participants through online convenience sampling to collect the demographic variables,behavioral information,receiving HIV serostatus disclosure,etc.Univariate and multivariate analyses were performed to interpret the associated factors of receiving HIV serostatus disclosure.

Prevalence and Predictors of PTSD During the Initial Stage of COVID-19 Epidemic among Female College Students in China.

Background: College students are vulnerable and may experience high stress due to COVID-19, especially girls. This study aims to identify posttraumatic stress disorder (PTSD) and related factors among the target population during the initial phases of the COVID-19 pandemic.

Methods: In the initial phase of COVID-19 epidemic (February 23 to March 5, 2020), 2205 female college students from six provinces in mainland China were enrolled in this study and completed the online survey about the cognitive status of COVID-19, including the Impact of Event Scale-6, the Multidimensional Perceived Social Support Scale and a self-developed 10-item Perceived threat scale.

Spatiotemporal evolution characteristics of the late frost damage risk to shrubby tea trees in tea region, southwest China from 1971 to 2020.

Understanding the spatiotemporal evolution characteristics of the risk of late frost damage has scientific guiding significance for optimizing the regional agricultural production layout and varie-ty tuning. Based on the daily meteorological data of 65 weather stations in the southwest China tea region from 1971 to 2020, we analyzed variation characteristics of the last frost date (LFD), tea bud open date (BOD), and their relationships, constructed frost damage probability index and frost damage severity index of spring shoots of shrubby tea trees, and analyzed the spatiotemporal evolution chara-cteristics of the late frost damage risk of shrub tea trees in the southwest tea region. The results showed that both the BOD and LFD had a significant ahead of trend from 1971 to 2020 and the early rate of the LFD was relatively faster than that of the BOD in the southwest tea region.

Impacts of transportation and meteorological factors on the transmission of COVID-19.

The ongoing pandemic of 2019 novel coronavirus disease (COVID-19) is challenging global public health response system. We aim to identify the risk factors for the transmission of COVID-19 using data on mainland China. We estimated attack rate (AR) at county level.

Psychological impact of COVID-19 on medical care workers in China.

Background: Medical care workers experienced unprecedented levels of workload and pressure since the outbreak of coronavirus disease 2019 (COVID-19). Little is known about its exact impact on medical care workers and related factors in China. This study aims to identify the psychological impact of COVID-19 on medical care workers in China.

Age-dependent Gender Differences in COVID-19 in Mainland China: Comparative Study.

Background: The ongoing pandemic of novel coronavirus disease 2019 (COVID-19) is challenging the global public health system. Sex differences in infectious diseases are a common but neglected problem.

Methods: We used the national surveillance database of COVID-19 in mainland China to compare gender differences in attack rate (AR), proportion of severe and critical cases (PSCC), and case fatality rate (CFR) in relation to age, affected province, and onset-to-diagnosis interval.

Unconjugated bilirubin alleviates experimental ulcerative colitis by regulating intestinal barrier function and immune inflammation.

Background: Unconjugated bilirubin (UCB) is generally considered toxic but has gained recent prominence for its anti-inflammatory properties. However, the effects of it on the interaction between intestinal flora and organisms and how it influences immune responses remain unresolved.

Aim: To investigate the role of UCB in intestinal barrier function and immune inflammation in mice with dextran-sulfate-sodium-induced colitis.

Hydrophilic polymer matrices in optical array sensing.

Whether in a glass chip or multi-well plate, differential array sensors are performed as a series of experiments and their output is compared among each other to obtain the differential signals evaluated by pattern recognition methods. To increase the practicality of performing a large number of experiments the sensor elements are often used as semi-wet gels displaying properties of both the solution and the solid state. Due to their semi-wet nature, such array sensors are easier to handle while offering a mechanical support, the affinity of hydrophilic matrices for water aids in analyte transport, and the tunable hydrophilic/hydrophobic nature of the matrices can be used adjusting the preference of the chemosensor membrane for different analytes.

The power of the weak: recognition of ion pairs in water using a simple array sensor.

An array sensor comprising six off-the-shelf indicators doped in a poly(ether-urethane) recognizes five cations, seven anions and thirty-five ion pairs at pH 5-9 in water. Such a discrimination capacity and recognition efficiency (6 : 35) with > or = 93% accuracy is rare. Low cost and wide availability of various polymers and indicators could make this approach useful in numerous applications.

[Research on the procedure for recovery and species identification of Legionella from surface environmental water].

Objective: To establish a set of procedure for recovery and species identification of Legionella from the surface environmental water.

Methods: Forty-four water samples were collected in eight parks of Guangzhou city from August to November in 2006. The bacteriologic examination was performed by cultivation on BCYEalpha plate, and 108 presumptive Legionella colonies were picked and their homogeneous relationship was analyzed by using an amplified fragment length polymorphism (AFLP) method.

[Beta-thalassemia major caused by compound heterozygosity for +40 to +43(-AAAC), IVS-2-654 (C to T) and codon 41/42 (-TCTT)].

Objective: To report the analysis of a rare beta-thalassemia ternary heterozygote [+40 to +43(-AAAC)*CD41/42(-TTCT)*IVS-2-654] causing beta-thalassemia major in a Chinese.

Methods: Using PCR-ASO probe hybridization analysis to scan 17 known types of beta-thalassemia mutations, and gene cloning and DNA sequencing to identify the underlying causative mutation.

Results: Reverse dot blot (RDB) analysis showed that the patient's beta-globin gene had three mutations: +40 to +43(-AAAC), CD41/42(-TCTT) and IVS-2-654(C to T).