Embracing city life: physical activities and the social integration of the new generation of female migrant workers in urban China

Drawing on empirical data from interviews with young Chinese female rural-urban migrant workers in the Pearl River Delta of China’s Guangdong province, this article explores the ways in which physical activities help to fulfil the ‘urban dream’ of this new generation of female migrant workers and promote their social integration. The article demonstrates that physical activities exert their influence and facilitate the young female migrant workers’ social integration into cities through four dimensions: ‘space’, ‘network’, ‘identity’ and ‘image’. Participating in sport and exercise expands the scale of workers’ living spaces and contributes to building social networks and selfidentification. It also enhances female migrant workers’ individualistic values, as opposed to family-oriented ones. These new values allow them to enjoy recreational life and to change the stereotypical image of rural-urban migrant workers

A new liquid chromatography–fluorescence method for determination of perfluorooctanesulphonyl fluoride upon derivatisation with 1-naphthol

<div><p>Perfluorooctanesulphonyl fluoride (PFOSF), as a main precursor of perfluorooctanesulphonate (PFOS) that is ubiquitous in the environment, has been released to the environment with substantial quantity. Determination of PFOSF presents significant analytical challenges for using liquid chromatography with UV (LC–UV) and fluorescence detection (LC–FLD) due to the lack of chromophore in the molecular structure. In this study, a new method was developed by derivatising PFOSF with 1-naphthol to form 1-naphthylperfluorooctanesulphonate (NPFOS), which allowed rapid qualitative and quantitative analysis using LC–UV and LC–FLD. The derivatising product was confirmed from the analyses by proton nuclear magnetic resonance and quadrupole–time of flight mass spectrometry. The LC–FLD method demonstrated good linearity in the NPFOS concentration range from 20 pg µL⁻¹ to 20 ng µL⁻¹ with a correlation coefficient better than 0.999, with the instrument detection limit of 1.5 pg µL⁻¹.</p></div

Synthesis of Triarylmethanes by Decarbonylation of 3,3-Diaryl Benzofuranones

A simple protocol for the synthesis of triarylmethane derivatives with three different (hetero)­aryl groups by decarbonylation of 3,3-diaryl benzofuranones, which can easily be prepared via arylation of benzofuranones, was developed. The reaction proceeds on heating in dimethylformamide (DMF) in the presence of CH3ONa and water to generate the products in good to excellent yields. This reaction can be easily scaled up to give a triarylmethane in a gram scale. Further chemical manipulation of the products enabled useful transformations of the phenol ring, including reduction, arylation, cyclization, etc

Nickel-Catalyzed Regioselective Cleavage of C_sp²–S Bonds: Method for the Synthesis of Tri- and Tetrasubstituted Alkenes

We describe here an efficient route for the synthesis of (<i>Z</i>)-vinylic sulfides <b>3</b> via the highly regio- and stereoselective coupling of (<i>Z</i>)-1,2-bis­(aryl­(alkyl)­thio)­alkenes and Grignard reagents over a Ni catalyst under mild conditions. (<i>Z</i>)-Vinylic sulfides <b>3</b> are important intermediates in the synthesis of tri- and tetrasubstituted alkenes that are important construction blocks for drugs and natural products. The directing organosulfur groups (SR) can be converted to diaryl­(alkyl) disulfides (RSSR) using H₂O₂ as oxidant, hence avoiding the waste of sulfur resources. The protocol provides a general method that is highly regio- and stereoselective for the synthesis of a diversity of tri- and tetrasubstituted alkenes

sj-tif-1-ajr-10.1177_19458924221104919 - Supplemental material for Long Non-Coding RNA DUXAP8 Acts as an Oncogene in Sinonasal Squamous Cell Carcinoma Through miR-584-5p/FNDC3B Pathway

Supplemental material, sj-tif-1-ajr-10.1177_19458924221104919 for Long Non-Coding RNA DUXAP8 Acts as an Oncogene in Sinonasal Squamous Cell Carcinoma Through miR-584-5p/FNDC3B Pathway by Xuan Chen, Guidi Li, Guanzhong Zhong, Junyong Chen, Lijun Feng, Tao Zhang and Zhi Tang in American Journal of Rhinology & Allergy</p

DataSheet1_Adsorption of Phosphate by Surface Precipitation on Lanthanum Carbonate Through In Situ Anion Substitution Reactions.docx

Efficient removal of phosphate (PO43−) is the main solution to control eutrophication. In this study, lanthanum carbonate (La2(CO3)3) was the adsorbent of choice for the removal of PO43−. Both adsorption isotherm and thermodynamic were investigated. La2(CO3)3 was an effective adsorbent for the removal of phosphate (PO43− or H2PO4−) under weak acidic conditions (pH = 2.0–6.0); the maximum adsorption amount was 106.6 mg g−1 at pH 2.9. The pHzpc of La2(CO3)3 changed from 2.1 to 6.5 prior to and after adsorption of PO43−. The adsorption of PO43− on the surfaces of La2(CO3)3 was an endothermic process. With the increase of anions, the adsorption efficiency of PO43- decreased. The presence of natural organic matter also inhibited the adsorption of PO43−, but the interference was weaker than that of anions. The mechanisms of adsorption were investigated by various techniques including Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), powder X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Based on the results obtained using XPS, during the adsorption process of PO43− on La2(CO3)3, La3+ was released and could precipitate with PO43− or H2PO4− under weak acidic conditions (pH = 2.0–4.0). Adsorption was dominated by in situ substitution reactions between CO32− and H2PO4− or HPO42−. This study provides a useful reference and potential material for the removal of PO43− in aquatic environments.</p

Palladium-Catalyzed Stereoselective Difunctionalization of Bicyclic Alkenes with Organoammonium Salts and Organoboronic Compounds

A palladium-catalyzed difunctionalization of bicyclic alkenes with organoammonium salts and organoboronic compounds was reported. A wide range of functionalized cyclic products, including those bearing functional groups, were produced stereoselectively in good to excellent yields. The gram-scale experiment, one-pot operation, and synthetic application of β-borylated products further demonstrated the synthetic value of this new reaction in organic synthesis

Negative Ion Laser Desorption/Ionization Time-of-Flight Mass Spectrometric Analysis of Small Molecules Using Graphitic Carbon Nitride Nanosheet Matrix

Ultrathin graphitic carbon nitride (g-C₃N₄) nanosheets served as a novel matrix for the detection of small molecules by negative ion matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) was described for the first time. In comparison with conventional organic matrices and graphene matrix, the use of g-C₃N₄ nanosheet matrix showed free matrix background interference and increased signal intensity in the analysis of amino acids, nucleobases, peptides, bisphenols (BPs), and nitropolycyclic aromatic hydrocarbons (nitro-PAHs). A systematic comparison of g-C₃N₄ nanosheets with positive and negative ion modes revealed that mass spectra produced by g-C₃N₄ nanosheets in negative ion mode were featured by singly deprotonated ion without matrix interference, which was rather different from the complicated alkali metal complexes in positive ion mode. Good salt tolerance and reproducibility allowed the determination of 1-nitropyrene (1-NP) in sewage, and its corresponding detection limit was lowered to 1 pmol. In addition, the ionization mechanism of the g-C₃N₄ nanosheets as matrix was also discussed. The work expands its application scope of g-C₃N₄ nanosheets and provides an alternative approach for small molecules