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Highly catalysis Zinc MOF-loaded nanogold coupled with aptamer to assay trace carbendazim by SERS
Jingjing Li,Aihui Liang,Jinling Shi,Zhiliang Jiang Techno-Press 2023 Advances in nano research Vol.14 No.4
Zinc metal organic framework (MOF<sub>Zn</sub>)-loaded goad nanoparticles (AuNPs) sol (Au@MOF<sub>Zn</sub>), which was characterized by TEM, Mapping, FTIR, XRD, and molecular spectrum, was prepared conveniently by solvothermal method. The results indicated that Au@MOF<sub>Zn</sub> had a very strong catalytic effect with the nanoreaction of AuNPs formation between sodium oxalate (SO) and HAuCl4. AuNPs in the new indicator reaction had a strong resonance Rayleigh scattering (RRS) signal at 370 nm. The indicator AuNPs generated by this reaction, which had the most intense surface enhanced Raman scattering (SERS) peak at 1621 cm -1. The new SERS/RRS indicator reaction in combination with specific aptamer (Apt) to fabricate a sensitive and selective Au@MOF<sub>Zn</sub> catalytic amplification-aptamer SERS/RRS assay platform for carbendazim (CBZ), with SERS/RRS linear range of 0.025-0.5 ng/mL. The detection limit was 0.02 ng/mL. Similarly, this assay platform has been also utilized to detect oxytetracycline (OTC) and profenofos (PF).
Distortional and local buckling of steel-concrete composite box-beam
Lizhong Jiang,Jingjing Qi,Andrew Scanlon,Linlin Sun 국제구조공학회 2013 Steel and Composite Structures, An International J Vol.14 No.3
Distortional and local buckling are important factors that influences the bearing capacity of steel-concrete composite box-beam. Through theoretical analysis of distortional buckling forms, a stability analysis calculation model of composite box beam considering rotation of steel beam top flange is resented. The critical bending moment calculation formula of distortional buckling is established. In addition, mechanical behaviors of a steel beam web in the negative moment zone subjected separately to bending stress, shear stress and combined stress are investigated. Elastic buckling factors of steel web under different stress conditions are calculated. On the basis of local buckling analysis results, a limiting value for height-to thickness ratio of a steel web in the elastic stage is proposed. Numerical examples are presented to verify the proposed models.
Breathing-based Continuous Non-intrusive User Verification Leveraging Commodity WiFi
Huan Dai,Jingjing Jiang,Jiaju Ma,He Huang,Hongbo Liu 한국통신학회 2022 Journal of communications and networks Vol.24 No.2
This paper opens up a new pathway of the utilityof breathing pattern for user verification. We demonstrate thatit is possible to capture people’s breathing pattern leveragingcommodity WiFi devices. While prior solutions for biometricsbaseduser recognition usually require dedicated devices (e.g.,video cameras or IR sensors), this paper introduces the firstgeneral, low-cost breathing-based user verification system usingcommodity WiFi devices. The proposed system is based onthe fact that the breathing pattern always keeps consistentfor the same user but distinct among different people. Ourinnovative method successfully extracts the breathing patternof different people based on channel state information of WiFisignal to facilitate user verification. The prototype study usingtwo commodity WiFi devices can differentiate people with anaverage verification accuracy over 90%, suggesting that ourbreathing-based user verification system using commerical offthe-shelf (COTS) WiFi is promising to be one of the most criticalmethods in biometrics.
One-Step Hydrothermal Preparation of 1D α-MoO3 Nanobelt Electrode Material for Supercapacitor
Puhong Wen,Jingjing Guo,Lijun Ren,Chuanchuan Wang,Yuzhu Lan,Xiaowen Jiang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.7
1D α-MoO3 nanobelts were prepared using ammonium heptamolybdate tetrahydrate [(NH4)6Mo7O24 · 4H2O] as raw material by one-step hydrothermal method without template or guide agent at 180 ℃. The layered α-MoO3 nanobelt electrode has favorable electrochemical performance, and displays a fairly high specific capacitance, which can be up to 445 F/g at a current density of 0.5 A/g.
Zhou, Xiufeng,Lu, Juan,Jiang, Jingjing,Li, Xiaobin,Lu, Mengna,Yuan, Guotao,Wang, Zuoshan,Zheng, Min,Seo, Hyo Jin Springer 2014 NANOSCALE RESEARCH LETTERS Vol.9 No.1
<P>N-doped mesoporous TiO<SUB>2</SUB> nanorods were fabricated by a modified and facile sol–gel approach without any templates. Ammonium nitrate was used as a raw source of N dopants, which could produce a lot of gasses such as N<SUB>2</SUB>, NO<SUB>2</SUB>, and H<SUB>2</SUB>O in the process of heating samples. These gasses were proved to be vitally important to form the special mesoporous structure. The samples were characterized by the powder X-ray diffraction, X-ray photoelectron spectrometer, nitrogen adsorption isotherms, scanning electron microscopy, transmission electron microscopy, and UV-visible absorption spectra. The average length and the cross section diameter of the as-prepared samples were <I>ca</I>. 1.5 μm and ca. 80 nm, respectively. The photocatalytic activity was evaluated by photodegradation of methylene blue (MB) in aqueous solution. The N-doped mesoporous TiO<SUB>2</SUB> nanorods showed an excellent photocatalytic activity, which may be attributed to the enlarged surface area (106.4 m<SUP>2</SUP> g<SUP>-1</SUP>) and the narrowed band gap (2.05 eV). Besides, the rod-like photocatalyst was found to be easy to recycle.</P>
Domination Rule For The Dynamic Multi-Route Transportation Problem Under Demand Uncertainty
Suk-Chul Rim(임석철),JingJing Jiang(장정정) 한국SCM학회 2014 한국SCM학회지 Vol.14 No.1
In today’s global manufacturing environment, products are usually transported globally to meet the changing demand of the customer, from an origin to a destination, multiple routes are usually available, with different lead times and unit transportation costs. In this paper, we consider the case where more than two routes are available. Assuming that the length of lead time and unit transportation cost are in reverse order for m (m>2) routes, we mathematically formulate the problem. We present a domination rule where some of the (m-2) in-between routes can be dominated by the fastest and slowest route in minimizing the long-term average total cost, while keeping the shortage rate at a certain level for a single product. In case all in-between routes are dominated, the problem becomes the two-route case, whose approximate optimal solution is known.
Black phosphorus nanosheets‑based effective electrochemical sensor for uric acid detection
Hao Wang,Haitao Wang,Jingjing Yang,Pramitha Yuniar Diah Maulida,Jing Zou,Arramel,Can Wu,Jizhou Jiang 한국탄소학회 2023 Carbon Letters Vol.33 No.7
Black phosphorus (BP) is incorporated in the electrochemical detection of uric acid (UA) to form few layers of BP nanosheets (BPNS)-modified glassy carbon electrodes (BPNS/GCE), investigated by means of ultrasound-assisted liquid-phase exfoliation. We find a significant increase in the peak current magnitude and positive potential shift in the electrochemical response of BPNS/GCE, which may be attributed to the larger specific surface area and good charge transfer ability of BPNS. Further, the electrochemical response of BPNS/GCE is evaluated under different conditions to achieve the optimal conditions. UA detection using differential pulse voltammetry (DPV) shows linear response within the range of 1–1000 μM with a detection limit of 0.33 μM. This work reveals new applications of BP nanomaterials in the electrochemical sensing, thereby promoting further advancement in terms of practical applications of two-dimensional nanomaterials.
Yanwei Ye,Jie Li,Dongbao Jiang,Jingjing Li,Chuangfeng Xiao,Yingze Li,Chao Han,Chunlin Zhao 대한암학회 2020 Cancer Research and Treatment Vol.52 No.4
Purpose Fibroblast growth factor receptor 4 (FGFR4) plays a critical role in cancer progression involving in tumor proliferation, invasion, and metastasis. This study clarified the role of FGFR4-Arg388 variant in gastric cancer (GC), and more importantly highlighted the possibility of this single nucleotide polymorphism (SNP) as potential therapeutic targets. Materials and Methods FGFR4 polymorphism was characterized in advanced GC patients to perform statistical analysis. FGFR4-dependent signal pathways involving cell proliferation, invasion, migration, and resistance to oxaliplatin (OXA) in accordance with the SNP were also assessed in transfected GC cell lines. Results Among 102 GC patients, the FGFR4-Arg388 patients showed significantly higher tumor stage (p=0.047) and worse overall survival (p=0.033) than the Gly388 patients. Immunohistochemical results showed that FGFR4-Arg388 patients were more likely to have higher vimentin (p=0.025) and p-STAT3 (p=0.009) expression compared with FGFR4-Gly388 patients. In transfected GC cells, the overexpression of FGFR4-Arg388 variant increased proliferation and invasion of GC cells, increasing resistance of GC cells to OXA compared with cells overexpressing the Gly388 allele. Conclusion The exploration mechanism may be through FGFR4-Arg388/STAT3/epithelial to mesenchymal transition axis regulating pivotal oncogenic properties of GC cells. The FGFR4-Arg388 variant may be a biomarker and a candidate target for adjuvant treatment of GC.
Hongmin Yang,Jingtao Zhi,Xianqun Yu,Jingjing Bao,Xiaoxiang Jiang 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.6
Titanium dioxide (TiO2) and Mn-doped TiO2 (Mn(x)-TiO2) were synthesized in a sol-gel method and characterized by BET surface area analysis, X‐ray diffraction (XRD) and X‐ray photoelectron spectroscopy (XPS). Gasphase elemental mercury (Hg0) oxidation and capture by the Mn-doped TiO2 catalyst was studied in the simulated flue gas in a fixed-bed reactor. The investigation of the influence of Mn loading, flue gas components (SO2, NO, O2, and H2O) showed that the Hg0 capture capability of Mn(x)-TiO2 was much higher than that of pure TiO2. The addition of Mn inhibits the grain growth of TiO2 and improves the porous structure parameters of Mn(x)-TiO2. Excellent Hg0 oxidation performance was observed with the catalyst with 10% of Mn loading ratio and 97% of Hg0 oxidation was achieved under the test condition (120 oC, N2/6%O2). The presence of O2 and NO had positive effect on the Hg0 removal efficiency, while mercury capture capacity was reduced in the presence of SO2 and H2O. XPS spectra results reveal that the mercury is mainly present in its oxidized form (HgO) in the spent catalyst and Mn4+ doped on the surface of TiO2 is partially converted into Mn3+ which indicates Mn and the lattice oxygen are involved in Hg0 oxidation reactions.