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1. Robust sufficient dimension reduction via ball covariance

Author:
Chen, Xin,   et al.   ; Zhang, Jia;     Show all 2 Author
Source:
Computational statistics & data analysis 2019 v.140 pp. 144-154
ISSN:
0167-9473
Subject:
covariance; model validation; regression analysis; simulation models
Abstract:
... Sufficient dimension reduction is an important branch of dimension reduction, which includes variable selection and projection methods. Most of the sufficient dimension reduction methods are sensitive to outliers and heavy-tailed predictors, and require strict restrictions on the predictors and the response. In order to widen the applicability of sufficient dimension reduction, we propose BCov-SDR ...
DOI:
10.1016/j.csda.2019.06.004

2. General models for estimating daily and monthly mean daily diffuse solar radiation in China's subtropical monsoon climatic zone

Author:
Chen, Xin,   et al.   ; Song, Zhe; Ren, Zhigang; Deng, Qinli; Kang, Xin; Zhou, Mi; Liu, Daoru;     Show all 7 Authors
Source:
Renewable energy 2020 v.145 pp. 318-332
ISSN:
0960-1481
Subject:
climatic zones; diffuse solar radiation; empirical models; meteorological data; monsoon season; solar energy; China
Abstract:
... Solar energy is the most prominent kind of renewable energy resource. Accessibility to accurate information on diffuse solar radiation is critical to solar energy applications. This study primarily aims to present a general approach for estimating diffuse solar radiation in China's subtropical monsoon climatic zone. For this purpose, 46 existing empirical models in eight sub-categories were invest ...
DOI:
10.1016/j.renene.2019.06.019

3. Preparation of Synthetic Amanitin Epitope Imprinted Polymers via Thiol-ene Click Reaction for Recognition and Extraction α- and β-Amanitins from Mushrooms

Author:
Chen, Xin,   et al.   ; Xu, Song; Tan, Jiean; Chen, Xiaojuan; Liang, Yong;     Show all 5 Authors
Source:
Chromatographia 2019 v.82 no.9 pp. 1355-1363
ISSN:
0009-5893
Subject:
Fourier transform infrared spectroscopy; beta-amanitin; crosslinking; epitopes; high performance liquid chromatography; microparticles; molecular imprinting; mushrooms; polymers; scanning electron microscopy; silica; sorbents; thermogravimetry
Abstract:
... Extraction and purification of α- and β-amanitins from mushroom samples are still challenges. Surface-imprinted core–shell microspheres were synthesized combining target recognition determinant imprinting and thiol-ene click reaction, and applied to the extraction of α- and β-amanitins in mushroom samples. The highly efficient thiol-ene click reaction method offers a simple condition during the cr ...
DOI:
10.1007/s10337-019-03751-8

4. p38gamma overexpression promotes renal cell carcinoma cell growth, proliferation and migration

Author:
Chen, Xin-Feng,   et al.   ; Pan, Yong-sheng; Zheng, Bing; Lu, Qiang;     Show all 4 Authors
Source:
Biochemical and biophysical research communications 2019 v.516 no.2 pp. 466-473
ISSN:
0006-291X
Subject:
CRISPR-Cas systems; apoptosis; carcinogenesis; cell growth; cyclins; humans; messenger RNA; neoplasm cells; neoplasm progression; phosphorylation; protein content; renal cell carcinoma; therapeutics; tissues; viability
Abstract:
... Recent studies have proposed that p38gamma (p38γ) might be critically involved in tumorigenesis and cancer progression. Its expression and potential functions in human renal cell carcinoma (RCC) are studied here. We show that p38γ mRNA and protein levels are upregulated in human RCC tissues, as compared to its levels in the surrounding normal renal tissues. p38γ upregulation was also detected in e ...
DOI:
10.1016/j.bbrc.2019.06.056

5. The removal mechanism and performance of tetrabromobisphenol A with a novel multi-group activated carbon from recycling long-root Eichhornia crassipes plants

Author:
Chen, Xin,   et al.   ; Liu, Lili; Wang, Zhiping; Wang, Xixi; Lin, Sen;     Show all 5 Authors
Source:
RSC advances 2019 v.9 no.43 pp. 24760-24769
ISSN:
2046-2069
Subject:
Eichhornia crassipes; activated carbon; adsorption; electron transfer; eutrophication; heat production; hydrogen bonding; moieties; remediation; sodium hydroxide; wastewater treatment
Abstract:
... Long-root Eichhornia crassipes has shown great potential in eutrophication treatments while the heavy disposal of its plants limits its large-scale application. In this study, the adsorption of TBBPA by a novel multi-group activated carbon (MGAC), prepared from the reaped long-root Eichhornia crassipes plants has been investigated as a potential recycling and remediation technology. The MGAC showe ...
DOI:
10.1039/c9ra03374b

6. Maduramicin induces apoptosis through ROS-PP5-JNK pathway in skeletal myoblast cells and muscle tissue

Author:
Chen, Xin,   et al.   ; Zhang, Yumei; Jiang, Shanxiang; Huang, Shile;     Show all 4 Authors
Source:
Toxicology 2019 v.424 pp. 152239
ISSN:
0300-483X
Subject:
acetylcysteine; apoptosis; maduramicin; mice; mitogen-activated protein kinase; myoblasts; myocytes; poultry production; protein content; reactive oxygen species; skeletal muscle; toxicity
Abstract:
... Our previous work has shown that maduramicin, an effective coccidiostat used in the poultry production, executed its toxicity by inducing apoptosis of skeletal myoblasts. However, the underlying mechanism is not well understood. Here we show that maduramicin induced apoptosis of skeletal muscle cells by activating c-Jun N-terminal kinase (JNK) pathway in murine C2C12 and L6 myoblasts as well as sk ...
DOI:
10.1016/j.tox.2019.152239

7. Elevated urine histone 4 levels in women with ovarian endometriosis revealed by discovery and parallel reaction monitoring proteomics

Author:
Chen, Xin,   et al.   ; Liu, Haiyuan; Sun, Wei; Guo, Zhengguang; Lang, Jinghe;     Show all 5 Authors
Source:
Journal of proteomics 2019 v.204 pp. 103398
ISSN:
1874-3919
Subject:
animal ovaries; biomarkers; body fluids; female genital diseases; histones; monitoring; pathophysiology; patients; proteome; proteomics; therapeutics; urine; women
Abstract:
... Endometriosis is a common gynecologic disorder and due to a lack of non-invasive detection methods, it can take up to 12 years before an affected woman obtains a diagnosis and receives appropriate treatment. Therefore, the identification of a specific biomarker that can be detected quickly and non-invasively is urgently needed. In this study, the urine proteome, a potentially rich source of biomar ...
DOI:
10.1016/j.jprot.2019.103398

8. Facile assembly of cellulose-derived 3D-graphene/lithium hydroxide monohydrate nanocomposite for low-temperature chemical heat storage

Author:
Chen, Xin,   et al.   ; Yang, Xixian; Li, Shijie; Zhang, Shiyi; Peng, Shuai;     Show all 5 Authors
Source:
Cellulose 2019 v.26 no.8 pp. 4815-4825
ISSN:
0969-0239
Subject:
activation energy; cellulose; environmental impact; graphene; heat; hydrophilicity; nanocomposites; nanomaterials; petroleum; storage temperature; thermal conductivity; thermal energy
Abstract:
... Commonly used nanocarbon composite materials are routinely synthesized from petroleum-based resources. To avoid their bad impact on the environment, using cellulose-based materials as the promising resources is a better choice due to its easy acquisition and rich reserves. In this study, microcrystalline cellulose was selected as the carbon precursor to synthesize novel cellulose-derived 3D-graphe ...
DOI:
10.1007/s10570-019-02409-w

9. Towards developing efficient aminopyridine-based electrochemical catalysts for CO2 reduction. A density functional theory study

Author:
Chen, Xin,   et al.   ; Wang, Chiming; Pan, Houhe; Qi, Dongdong; Jiang, Jianzhuang;     Show all 5 Authors
Source:
Journal of catalysis 2019 v.373 pp. 75-80
ISSN:
0021-9517
Subject:
carbon dioxide; catalysts; catalytic activity; chromium; cobalt; density functional theory; electrochemistry; energy; manganese; moieties; nickel; oxygen; prediction; reaction mechanisms; thermodynamics
Abstract:
... We report here the electrochemical reaction mechanism of CO2 reduction catalyzed by aminopyridine cobalt complex. The thermodynamic energy barriers and the rate-determining step are unveiled on the basis of DFT calculation results. In addition, a computational investigation for the purpose of predicting the catalytic reactivity of a series of aminopyridine metal (Mn, Ni, Cr) complexes has also bee ...
DOI:
10.1016/j.jcat.2019.03.018

10. Colorimetric assay of Hg²⁺ based on the inhibition of peroxidase mimetic activity of gold nanoclusters induced by Hg²⁺

Author:
Chen, Xin,   et al.   ; Jiang, Xueding; Xu, Weicheng; Liang, Yong;     Show all 4 Authors
Source:
Analytical methods 2019 v.11 no.16 pp. 2179-2182
ISSN:
1759-9679
Subject:
aqueous solutions; blood serum; cattle; color; colorimetry; enzyme inhibition; gold; hydrogen peroxide; lakes; mercury; nanogold; nanoparticles; peroxidase
Abstract:
... In this paper, we report a highly sensitive and selective colorimetric assay for Hg²⁺ detection in aqueous solutions. Bovine serum albumin–gold nanoclusters (BSA–AuNCs) were prepared and used as a mimetic peroxidase to catalyze the 3,3′,5,5′-tetramethylbenzidine (TMB)–H₂O₂ system. In the absence of Hg²⁺, the AuNCs catalyze the reaction between TMB and H₂O₂, leading to a color change from colorless ...
DOI:
10.1039/c9ay00109c

11. Investigation of inverse emulsion assisted controlled release of polyacrylamides for enhanced oil recovery

Author:
Chen, Xin,   et al.   ; Liu, Zheyu; Mendiratta, Shruti; Zhang, Jian; Li, Yiqiang;     Show all 5 Authors
Source:
RSC advances 2019 v.9 no.21 pp. 11968-11977
ISSN:
2046-2069
Subject:
emulsions; micelles; oil fields; oils; permeability; polyacrylamide; viscoelasticity; viscosity
Abstract:
... Conventional polymer flooding (e.g. using polyacrylamide) has been widely used in the oil fields as an economical means for enhanced oil recovery. However, its efficacy is affected by the polymer properties and increasingly harsh reservoir conditions. In this study, a high-molecular-weight modified polyacrylamide polymer (GF-1) encapsulated in a water-in-oil emulsion is proposed for controlled pol ...
DOI:
10.1039/c9ra00465c

12. One-step fabrication of trimetallic core–shell Au@PdAuCu mesoporous nanospheres for ethanol electrooxidation

Author:
Chen, Xin,   et al.   ; Lv, Hao; Sun, Lizhi; Xu, Dongdong; Liu, Ben;     Show all 5 Authors
Source:
Green chemistry 2019 v.21 no.8 pp. 2043-2051
ISSN:
1463-9270
Subject:
aqueous solutions; catalysts; ethanol; gold; green chemistry; nanocrystals; nanoparticles; nanospheres; oxidation; porous media; quaternary ammonium compounds; surfactants
Abstract:
... The electrocatalytic performance of the noble metal-based nanocatalysts greatly depends on the structure/morphology and composition, which can be precisely tailored by the control over synthetic parameters. In this study, a simple one-step fabrication of hierarchically trimetallic core–shell Au@PdAuCu mesoporous nanospheres (MNSs) was realized via the successive reduction and growth of metal nanoc ...
DOI:
10.1039/c9gc00263d

13. Facile fabrication of hierarchical porous ZIF-8 for enhanced adsorption of antibiotics

Author:
Chen, Xin,   et al.   ; Jiang, Xue; Yin, Changjie; Zhang, Baoliang; Zhang, Qiuyu;     Show all 5 Authors
Source:
Journal of hazardous materials 2019 v.367 pp. 194-204
ISSN:
0304-3894
Subject:
Ostwald ripening; adsorption; anions; chloramphenicol; crystals; electrostatic interactions; macropores; mass transfer; porosity; porous media; quaternary ammonium compounds; surface area; tetracycline
Abstract:
... Aiming for improve mass transfer rate of antibiotics adsorption from water, a strategy of building larger pores (>2 nm) in microporous MOFs has been put forward. However, most of reported approaches are complicated and inefficient. Herein, a facile one-spot approach to fabricate hierarchical porous Zeolitic Imidazolate Framework-8 (HpZIF-8) was developed, where poly(diallyldimethylammonium chlorid ...
DOI:
10.1016/j.jhazmat.2018.12.080

14. Colorimetric assay for ultrasensitive detection of Ag(I) ions based on the formation of gold nanoparticle oligomers

Author:
Chen, Xin,   et al.   ; Jiang, Xueding; Xu, Weicheng; Liang, Yong;     Show all 4 Authors
Source:
Analytical and bioanalytical chemistry 2019 v.411 no.11 pp. 2439-2445
ISSN:
1618-2642
Subject:
colorimetry; detection limit; glass; ions; mercury; microscopy; nanogold; nanosilver; oligonucleotides; river water; silver
Abstract:
... Here, we report an ultrasensitive colorimetric method for determination of Ag⁺ based on gold nanoparticle (AuNP) oligomers with dark-field microscopy. In a proof-of-concept trial, two cytosine-rich (C-rich) aptamers as the sensing elements and AuNPs as the transducer to produce the detectable signal are designed for Ag⁺ determination. Obviously, the C bases in the two aptamers play a crucial role ...
DOI:
10.1007/s00216-019-01685-6

15. An integrated approach to investigate the relationship of coupling coordination between social economy and water environment on urban scale - A case study of Kunming

Author:
Chen, Xin,   et al.   ; Cui, Dan; Xue, Yinglan; Li, Rui; Zeng, Weihua;     Show all 5 Authors
Source:
Journal of environmental management 2019 v.234 pp. 189-199
ISSN:
0301-4797
Subject:
ammonium nitrogen; case studies; cities; decision making; dynamic models; pollutants; pollution; socioeconomic development; wastewater; water resources; China
Abstract:
... With a rapid economic growth and social development in China, the associated problems of water pollution and shortage of water resources would limit the sustainable and coordinated development of socioeconomic and water environmental systems of urban cities. To investigate the relationship of coupling coordination between social economy and water environment on urban scale, we introduced an integr ...
DOI:
10.1016/j.jenvman.2018.12.091

16. Sensitive colorimetric detection of melamine in processed raw milk using asymmetrically PEGylated gold nanoparticles

Author:
Chen, Xin-Yue,   et al.   ; Ha, Wei; Shi, Yan-Ping;     Show all 3 Authors
Source:
Talanta 2019 v.194 pp. 475-484
ISSN:
0039-9140
Subject:
aggregation behavior; aqueous solutions; color; colorimetry; detection limit; melamine; milk; nanogold; polyethylene glycol; raw milk; stabilizers
Abstract:
... In this study, the asymmetrically modified gold nanoparticles (AuNPs) with relatively large size are proposed for highly sensitive detection of melamine in raw milk. At first, we found that the sensitivity of colorimetric detection of melamine based on the conventional citrate-stabilized AuNPs could be significantly increased (limit of detection by visual observation: from 1 μmol L−1 to 1 nmol L−1 ...
DOI:
10.1016/j.talanta.2018.10.070

17. Integral structured Co–Mn composite oxides grown on interconnected Ni foam for catalytic toluene oxidation

Author:
Chen, Xin,   et al.   ; Jiang, Xueding; Xu, Weicheng; Lai, Shufeng;     Show all 4 Authors
Source:
RSC advances 2019 v.9 no.12 pp. 6533-6541
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; catalysts; catalytic activity; cobalt; foams; manganese; nickel; oxidation; oxides; oxygen; scanning electron microscopy; texture; toluene; toxicity; transmission electron microscopy; volatile organic compounds
Abstract:
... Considering the three-dimensional ordered network of Ni foam-supported catalysts and the toxicity effects of volatile organic compounds (VOCs), the design of proper active materials for the highly efficient elimination of VOCs is of vital importance in the environmental field. In this study, a series of Co–Mn composite oxides with different Co/Mn molar ratios grown on interconnected Ni foam are pr ...
DOI:
10.1039/c8ra10102g

18. Targeting NPRL2 to enhance the efficacy of Olaparib in castration-resistant prostate cancer

Author:
Chen, Xin,   et al.   ; Chen, Zhixiong; Zheng, Bin; Tang, Wei;     Show all 4 Authors
Source:
Biochemical and biophysical research communications 2019 v.508 no.2 pp. 620-625
ISSN:
0006-291X
Subject:
DNA repair; Western blotting; apoptosis; ataxia (disorder); cell lines; cell proliferation; drug therapy; drugs; enzymes; gene expression; genes; in vivo studies; mechanism of action; mice; prostatic neoplasms
Abstract:
... Castration-resistant prostate cancer (CRPC) lacks effective treatment, and studies have shown that PARPi inhibitors, such as Olaparib, are somewhat effective; however, the efficacy of Olaparib in CRPC still needs to be further improved. Nitrogen permease regulator-like 2 (NPRL2) is reported to be a tumor suppressor candidate gene and is closely related to the DNA repair pathway, which can affect t ...
DOI:
10.1016/j.bbrc.2018.11.062

19. Cadmium removal from soil by fulvic acid-aided hydroxyapatite nanofluid

Author:
Chen, Xin,   et al.   ; Li, Qi; Chen, Xijuan; Jin, Yan; Zhuang, Jie;     Show all 5 Authors
Source:
Chemosphere 2019 v.215 pp. 227-233
ISSN:
0045-6535
Subject:
adsorption; cadmium; cost effectiveness; fulvic acids; hydroxyapatite; leachates; loam soils; nanofluids; nanoparticles; pollutants; polluted soils; subsurface drainage
Abstract:
... Mobile engineered nanoparticles have the potential for removing a variety of pollutants from contaminated soils. In this study, elution of soil cadmium (Cd) by nano hydroxyapatite (nHAP) suspension was investigated at different concentrations of fulvic acid (FA). The nHAP nanofluid (500 mg L−1) increased the elution rate of soil Cd by ∼4.34 times (from 0.64% to 2.78%) compared with nHAP-free backg ...
DOI:
10.1016/j.chemosphere.2018.10.031

20. Oxygen reduction reaction on cobalt–(n)pyrrole clusters from DFT studies

Author:
Chen, Xin
Source:
RSC advances 2016 v.6 no.7 pp. 5535-5540
ISSN:
2046-2069
Subject:
active sites; adsorption; cobalt; durability; electrochemistry; oxygen; pyrroles; synergism
Abstract:
... The oxygen reduction reaction (ORR) catalyzed by Co–(n)PPy (n = 2–10) clusters is investigated in detail at BLYP/DZP level of theory. The calculation results indicate that different O₂ adsorption modes could greatly affect the types of the reduction intermediates. The side-on O₂ adsorption is more likely to yield the intermediate HO–OH, while end-on yields H₂O–O. However, the side-on O₂ adsorption ...
DOI:
10.1039/c5ra23568e