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55. Experimental study on the influence of fuel-rich and fuel-lean coal/airflow ratio on aerodynamic characteristics of a 300MWe foster wheeler down-fired boiler.

Author

Du, He, Li, Zhengqi, Zhang, Mingdi, Zhang, Ning, Chen, Zhichao, Song, Jian, Fang, Fan, Su, Jianjun, and Liu, Haibing

Subjects
COAL combustion, AIR flow, PULVERIZED coal, COAL, BOILERS, PARTICLE tracks (Nuclear physics), FURNACES
Abstract

To address the problem of late ignition and poor burnout of Foster-Wheeler down-fired boilers, this study proposed a new combustion technology, which combines adding on arch secondary air and alternately arranging the fuel-lean coal/airflow (FLCA) and fuel-rich coal/airflow (FRCA). The coal particle trajectories of FLCA and FRCA and overall aerodynamic characteristics in the furnace were studied at FRCA and FLCA ratio (RRL) of 5:5, 7:3, and 9:1. The results showed that even at a low FRCA ratio, the new combustion technology could still effectively ensure the penetration depth of pulverised coal/airflow. At different RRL values, the main airflow from the arch appeared in the near-wall area and could penetrate downwards into the cold ash hopper area. With an increase in the value of RRL, the deflection degree of FLCA towards the furnace wall increased, while that of FRCA decreased. At RRL of 7:3, both the penetration depth and deflection degree of FRCA and FLCA were at a high level, which was conductive to promoting the burnout and recommended in practical applications. [ABSTRACT FROM AUTHOR]

Published
2023
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56. Changes in the Density and Composition of Rhizosphere Pathogenic Fusarium and Beneficial Trichoderma Contributing to Reduced Root Rot of Intercropped Soybean

Author

Xu, Huiting, primary, Yan, Li, additional, Zhang, Mingdi, additional, Chang, Xiaoli, additional, Zhu, Dan, additional, Wei, Dengqin, additional, Naeem, Muhammd, additional, Song, Chun, additional, Wu, Xiaoling, additional, Liu, Taiguo, additional, Chen, Wanquan, additional, and Yang, Wenyu, additional

Published
2022
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58. Experimental investigation on controlling of airflow trajectories and flow-field of down-fired boiler by adding on arch secondary air.

Author

Li, Zhengqi, Du, He, Zhang, Ning, Zhang, Mingdi, Chen, Zhichao, Song, Jian, Fang, Fan, Su, Jianjun, and Liu, Haibing

Subjects
AIR flow, ARCHES, THERMAL efficiency, BOILERS, COAL combustion, FURNACES, COAL
Abstract

To effectively control the flow and combustion of pulverised coal in down-fired boilers and improve their thermal efficiency while ensuring low NOx emissions, on arch secondary air (OASA) combustion technology and a smoke-tracing analysis were proposed. The aerodynamic characteristics of a 300-MWe Foster Wheeler (FW) down-fired boiler with the OASA ratios (ROASA) of 0%, 10%, 20%, and 30%, the flow trajectories and mixing characteristics of OASA, and fuel-rich coal/air flow (FRA) and fuel-lean coal/air flow (FLA) were studied experimentally. For the ROASA of <10%, FRA and FLA flow to furnace centre soon after they are injected into the furnace. OASA and FLA may mix with FRA before ignition. For the ROASA of 20% or higher, FRA and FLA flow to the near-wall area soon after being injected into the furnace. FRA mixes with OASA after ignition. With the increase in ROASA, the mixing distance between OASA and FRA increases first and then decreases. The penetration depth of coal/air flow and furnace airflow fullness increases. For the ROASA of 30%, the dimensionless penetration depth of coal/air flow can exceed 0.7. Furnace dimensionless airflow fullness at all the dimensionless heights can exceed 0.6. In real operation, the recommended ROASA is between 20 and 30%. [ABSTRACT FROM AUTHOR]

Published
2023
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66. Varicella-zoster virus early infection but not complete replication is required for the induction of chronic hypersensitivity in rat models of postherpetic neuralgia

Author

Warner, Benjamin E., primary, Yee, Michael B., additional, Zhang, Mingdi, additional, Hornung, Rebecca S., additional, Kaufer, Benedikt B., additional, Visalli, Robert J., additional, Kramer, Phillip R., additional, Goins, William F., additional, and Kinchington, Paul R., additional

Published
2021
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71. 基于SPR和干涉模式复合增强窄带钙钛矿光电探测器

Author

何剑涛 He Jiantao, 吕且妮 Lu Qieni, 张明娣 Zhang Mingdi, 戴海涛 Dai Haitao, 付宜凯 Fu Yikai, and 陈小鹏 Chen Xiaopeng

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2022

72. 一种基于Kagome晶格的少模波导结构

Author

要焱宏 Yao Yanhong, 吕且妮 Qieni Lü, 陈小鹏 Chen Xiaopeng, 张明娣 Zhang Mingdi, and 张淼淼 Zhang Miaomiao

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2022

77. Industrial Measurement of Combustion and NOx Formation Characteristics on a Low-Grade Coal-Fired 600MWe FW Down-Fired Boiler Retrofitted with Novel Low-Load Stable Combustion Technology

Author

Du, He, primary, Li, Zhengqi, additional, Liu, Zheng, additional, Zhang, Mingdi, additional, Huang, Chunchao, additional, Jiang, Guangfei, additional, Chen, Zhichao, additional, Song, Jian, additional, Fang, Fan, additional, Su, Jianjun, additional, and Liu, Haibing, additional

Published
2021
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88. GBM-Targeted oHSV Armed with Matrix Metalloproteinase 9 Enhances Anti-tumor Activity and Animal Survival

Author

Sette, Paola, primary, Amankulor, Nduka, additional, Li, Aofei, additional, Marzulli, Marco, additional, Leronni, Daniela, additional, Zhang, Mingdi, additional, Goins, William F., additional, Kaur, Balveen, additional, Bolyard, Chelsea, additional, Cripe, Timothy P., additional, Yu, Jianhua, additional, Chiocca, E. Antonio, additional, Glorioso, Joseph C., additional, and Grandi, Paola, additional

Published
2019
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91. Development of Structure-Switching Aptamers for Kanamycin Detection Based on Fluorescence Resonance Energy Transfer

Author

Ruifang Su, Hongjing Sun, Xinyue Ma, Zhang Mingdi, Chunyan Sun, and Shangna Qiao

Subjects
kanamycin, Fluorophore, Aptamer, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Helix structure, lcsh:Chemistry, chemistry.chemical_compound, medicine, structure-switching, Original Research, Detection limit, Chemistry, aptamer, Kanamycin, General Chemistry, 021001 nanoscience & nanotechnology, Combinatorial chemistry, Fluorescence, 0104 chemical sciences, Förster resonance energy transfer, Linear range, lcsh:QD1-999, FRET, fluorescence, 0210 nano-technology, medicine.drug
Abstract

The structure-switching aptamers are designed for the simple and rapid detection of kanamycin based on the signal transduction principle of fluorescence resonance energy transfer (FRET). The structure switch is composed of kanamycin-binding aptamers and the complementary strands, respectively labeled with fluorophore and quencher, denoted as FDNA and QDNA. In the absence of kanamycin, FDNA and QDNA form the double helix structure through the complementary pairing of bases. The fluorophore and the quencher are brought into close proximity, which results in the fluorescence quenching because of the FRET mechanism. In the presence of kanamycin, the FDNA specifically bind to the target due to the high affinity of aptamers, and the QDNA are dissociated. The specific recognition between aptamers and kanamycin will obstruct the formation of structure switch and reduce the efficiency of FRET between FDNA and QDNA, thus leading to the fluorescence enhancement. Therefore, based on the structure-switching aptamers, a simple fluorescent assay for rapid detection of kanamycin was developed. Under optimal conditions, there was a good linear relationship between kanamycin concentration and the fluorescence signal recovery. The linear range of this method in milk samples was 100-600 nM with the detection limit of 13.52 nM (3σ), which is well below the maximum residue limit (MRL) of kanamycin in milk. This method shows excellent selectivity for kanamycin over the other common antibiotics. The structure-switching aptamers have been successfully applied to the detection of kanamycin spiked in milk samples with the satisfying recoveries between 101.3 and 109.1%, which is well-consistent with the results from LC-MS/MS. Due to the outstanding advantages of facile operation, rapid detection, high sensitivity, excellent specificity, and low cost, the application and extension of this strategy for rapid determination of antibiotics in food samples may greatly improve the efficiency in food safety and quality supervision.

Published
2019

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