ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Xinliang Li,Guancheng Jiang,Xiulun Shen,Gongrang Li
The hydration and swelling of shale formations are serious problems for well drilling. The use of an efficient shale inhibitor is one of the most important methods for overcoming the wellbore instability issue. In this work, poly-l-arginine (PArg) was synthesized and used as an efficient and biodegradable shale inhibitor. This inhibitor was systematically evaluated through measuring the swelling degree of the bentonite (Bent) pellet, the rheological behavior of the Bent suspensions, and the recovery percentage of shale cuttings. The results demonstrated that 2.0 wt % PArg could reduce the swelling degree of Bent to 70.53%, improve the shale recovery percentage to 71.40% at 180 °C, and inhibit 12.0 wt % Bent mud-making. The PArg displayed a highly inhibitive performance and excellent high-temperature resistance property, better than common inorganic KCl and organic polyether diamine. The underlying inhibition mechanism was also proposed based on measuring the variation of the interlayer spacing of the Bent, observing the exterior morphologies of Bent particles, and assessing the particle size distribution and electrokinetic potential. The results indicated that the PArg displayed its inhibitive effect mainly by adsorbing onto the Bent, encapsulating the Bent particles efficiently, and decreasing the interlayer spacing in a certain degree with 0.9 Å. This study can contribute to designing highly inhibitive water-based drilling fluids containing PArg.
研究领域:
石油工程
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材料科学
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生物化学
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DOI
高影响因子
JOURNAL OF ANALYTICAL CHEMISTRY
·
2018
·Vol. 73
·期 8
·817-823
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IF 0.971
Hu Q. Q.,Gao H.,Wang Y. M.,Ma W.,Sun D. M.
Abstract The poly(L-arginine)–graphene modified glassy carbon electrode ( GCE ) was fabricated and the electrochemical behavior of carmine and amaranth on this electrode was studied by cyclic voltammetric method. Compared with poly(L-arginine)/GCE and GCE, the poly(L-arginine)–graphene modified GCE improved the sensitivity for the determination of carmine and amaranth. The experimental results indicated that the oxidation peaks of carmine and amaranth were separated at 121 mV in phosphate buffer solution at pH 2.5. The linear range for the simultaneous determination of carmine and amaranth were 7.5 × 10 –7 –7.5 × 10 –5 M. The detection limits were 7 × 10 –8 M for carmine and 2.5 × 10 –7 M for amaranth. The method has been applied to the simultaneous determination of carmine and amaranth in drinks with satisfactory results.
研究领域:
分析化学
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食品科学
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电化学
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DOI
高影响因子
ANALYTICAL SCIENCES
·
2017
·Vol. 33
·期 8
·917-923
·
IF 1.228
Gangbing ZHU,Heng SUN,Junjuan QIAN,Xiangyang WU,Yinhui YI
The simultaneous and sensitive electrochemical detection of dihydroxybenzene isomers (hydroquinone, HQ; catechol, CC; resorcinol, RS) is of great significance because such isomers can be awfully harmful to the environment and human health. In this paper, by preparing poly(L-arginine) modified glassy carbon electrode (P-L-Arg/GCE) with a simple method, a highly sensitive electrochemical sensor for simultaneously detecting HQ, CC and RS was constructed successfully due to the large surface area, good electronic properties and catalytic ability of P-L-Arg/GCE and the electrostatic action between P-L-Arg (positive) and targets (negative). Under the optimized conditions, the results show that the P-L-Arg/GCE has a wide linear range from 0.1 to 110.0 μM for HQ ,CC and RS. The detection limits for HQ, CC and RS are 0.01, 0.03 and 0.1 μM, respectively. Finally, the proposed sensor was successfully applied in real sample analysis.
研究领域:
分析化学
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环境科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Peilong Wang,Xu Liu,Qingqing Hu,Hui Gao,Wei Ma
A simple and rapid electrochemical method based on a poly(L-arginine)-electrochemically reduced graphene oxide-modified glassy carbon electrode fabricated by cyclic voltammetry has been developed for the determination of tartrazine. Compared with the bare glassy carbon electrode, the modified electrode achieved a well-defined and enhanced oxidation peak due to the increased conductivity and electrochemical active surface area. The bare glassy carbon electrode and the modified electrode were characterized by scanning electron microscopy and electrochemical impedance spectroscopy. The electrocatalytic oxidation behaviors of tartrazine on the modified electrode were investigated using cyclic voltammetry and differential pulse voltammetry. The voltammetric peak current of tartrazine exhibits good linearity in the range of 1.00×10 -6 -2.50×10 -4 mol L -1 under the optimal differential pulse voltammetry conditions, with a detection limit of 2.5×10 -7 mol L -1 (at an S/N of 3). This proposed method has also been applied for quantitative analysis of tartrazine in some carbonated beverage and fruit juice samples, with satisfactory results.
研究领域:
分析化学
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食品科学
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电化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Weiqiang Li,Kaisheng Diao,Daoyang Qiu,Yifang Zeng,Kaijie Tang,Yifu Zhu,Yingying Sheng,Yangping Wen,Mingfang Li
A new strategy to mimic antibody for electrochemical recognition and detection of deoxynivalenol (DON) using a highly-sensitive and selective antibody-like sensor based on molecularly imprinted poly( l -arginine) (P-Arg-MIP) on carboxylic acid functionalized carbon nanotubes (COOH-MWCNTs) was proposed. l -arginine as functional monomer was screened to prepare imprinted electrode via its electro-polymerization in the presence of DON onto the surface of COOH-MWCNTs electrode coupled with theoretical calculation. Surface morphology, structural characteristics, and electrochemical properties of P-Arg-MIP/COOH-MWCNTs were characterized by SEM, EDS, FTIR, and CV, respectively. P-Arg-MIP/COOH-MWCNTs displayed relatively high conductivity, high effective surface area, antibody-like molecular recognition and affinity, and a good response towards DON in a linear range from 0.1 to 70 μM with LOD of 0.07 μM in wheat flour samples with satisfactory recovery and feasible practicability in comparison with HPLC. This method provides a promising biomimetic sensing platform for the determination of mycotoxins in food and agro-products.
研究领域:
食品科学
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分析化学
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生物技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2012
·
IF 2.905
Yamin Li,Zhuo Ye,Jing Zhou,Jie Liu,Ge Song,Kai Zhang,Baoxian Ye
A novel voltammetric sensor based on graphene–Nafion and poly( L -arginine) was constructed by electrodeposited and simple dipping–drying methods and used for high-sensitive determination of Terbutaline sulfate (TBS). The resulting poly( L -arginine)/graphene–Nafion modified electrode showed a significant voltammetric response to TBS due to the synergistic effect of poly( L -arginine) and graphene–Nafion, in which poly( L -arginine) had electrocatalytic ability for TBS and graphene provided a large specific surface area, excellent electric conductivity and electrocatalytic activity. The sensor gave a good linear range over 4.0 × 10 −8 –5.0 × 10 −6 mol L −1 with a detection limit of 1.2 × 10 −8 mol L −1 towards the determination of TBS. The high sensitivity and selectivity together with the good linear relationship, very easy surface regeneration and good stability at such a modified electrode led us to construct a practical TBS biosensor successfully. This work promoted the potential applications of graphene-based materials in electrochemical sensors.
研究领域:
电化学
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材料科学
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分析化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 9
·1-10
·
IF 5.705
Khan Md. Zaved H.,Liu Xiaoqiang,Tang Yunfei,Zhu Jinhua,Hu Weiping,Liu Xiuhua
A glassy carbon electrode (GCE) was modified with poly(L-arginine) (P-Arg), reduced graphene oxide (rGO) and gold nanoparticle (AuNP) to obtain an electrode for simultaneous determination of dopamine (DA), serotonin (5-HT) and L-tryptophan (L-Trp) in the presence of ascorbic acid (AA). The modified GCE was prepared via subsequent ‘layer-by-layer’ deposition using an electrochemical technique. The surface morphology of the modified electrode was studied by scanning electron microscopy, and electrochemical characterizations were carried out via cyclic voltammetry and electrochemical impedance spectroscopy. The modified electrode showed excellent electrocatalytic activity toward DA, 5-HT and L-Trp at pH 7.0. Figures of merit for the differential pulse voltammetric reponse are as follows: (a) Response to DA is linear in two intervals, viz. 1.0–50 nM and 1.0–50 μM DA concentration range, the typical working voltage is 202 mV (vs. Ag/AgCl), and the detection limit is 1 nM (at an S/N ratio of 3). For 5-HT, the respective data are 10 to 500 nM and 1.0 to 10 μM, 381 mV, and 30 nM. For L-Trp, the respective data are 10–70 nM and 10–100 μM, 719 mV, and 0.1 μM. The modified GCE is fairly selective. It was successfully applied to the simultaneous determination of DA, 5-HT, and L-Trp in spiked urine samples, and high recovery rates were found.
Schematic presentation of the voltammetric sensor based on a glassy carbon electrode modified with poly(L-arginine), reduced graphene oxide (rGO) and gold nanoparticle (GCE/P-Arg/ErGO/AuNP) for simultaneous determination of dopamine (DA), serotonin (5-HT) and L-tryptophan (L-Trp).
研究领域:
分析化学
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生物医学工程
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神经科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Mengru Yao,Guiyin Zhang,Danchun Shao,Shan Ding,Lihua Li,Hong Li,Changren Zhou,Binghong Luo,Lu Lu
Currently, hemoperfusion is clinically the most rapid and effective treatment for removing toxins from the blood. The core of hemoperfusion is the sorbent inside the hemoperfusion device. Due to the complex composition of the blood, adsorbents tend to adsorb substances such as proteins in the blood (non-specific adsorption) while adsorbing toxins. Hyperbilirubinemia is caused by excessive levels of bilirubin in the human blood, causing irreversible damage to the patient's brain and nervous system, and even leading to death. High adsorption and high biocompatibility adsorbents with specific bilirubin adsorption are urgently needed to treat hyperbilirubinemia. Herein, poly(L-arginine) (PLA) which can specifically adsorb bilirubin, was introduced into chitin/MXene (Ch/MX) composite aerogel spheres. Ch/MX/PLA prepared by supercritical CO 2 technology had higher mechanical properties than Ch/MX and can withstand 50,000 times its own weight. The in vitro simulated hemoperfusion test showed that the adsorption capacity of Ch/MX/PLA was as high as 596.31 mg/g, which was 15.38 % higher than that of Ch/MX. Binary and ternary competitive adsorption tests showed that Ch/MX/PLA also had good adsorption capacity in the presence of a variety of interfering molecules. In addition, hemolysis rate testing and CCK-8 testing confirmed that Ch/MX/PLA had better biocompatibility and hemocompatibility. Ch/MX/PLA can meet the required properties of clinical hemoperfusion sorbents and has the ability to produce mass production. It has good application potential in the clinical treatment of hyperbilirubinemia.
研究领域:
材料科学
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生物医学工程
·
化学工程
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Shuo Yang,Nan Wang,Xiao–kun Ouyang,Yiwei Wu,Junhua Hu
Infection and inflammation are key factors affecting wound healing. Hydrogels are excellent wound dressings that provide a moist healing environment and serve as carriers for drugs or functional components. This work proposes a composite hydrogel, APLCE, composed of methyl methacrylate L-arginine (M-L-Arg) as an NO donor, synthesized through free radical polymerization with acrylamide (AM) and polyethylene glycol (PEG). The hydrogel matrix exhibits good water retention and mechanical properties. CaO 2 and ε-poly-L-arginine (EPL) are embedded in the hydrogel to form APLCE, where the hydrolysis of CaO 2 releases H 2 O 2 , triggering the release of arginine to release NO, inhibiting wound inflammation and bacterial growth. EPL added to the hydrogel synergistically with NO exhibits an antibacterial effect, with a bacterial inhibition rate exceeding 99 %. Animal experiments show that APLCE can completely eradicate bacteria in infected wounds, promote new skin formation, and achieve a wound closure rate of 94 % within 14 days. These findings emphasize the potential clinical application of APLCE as an innovative wound dressing material.
研究领域:
材料科学
·
生物医学工程
·
药学
·
伤口愈合
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）