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136 results on '"Zhao, Yuanzheng"'

11. Maize functional requirements drive the selection of rhizobacteria under long‐term fertilization practices

Author

Zhang, Liyu, primary, Yuan, Liang, additional, Wen, Yanchen, additional, Zhang, Meiling, additional, Huang, Shuyu, additional, Wang, Shiyu, additional, Zhao, Yuanzheng, additional, Hao, Xiangxiang, additional, Li, Lujun, additional, Gao, Qiang, additional, Wang, Yin, additional, Zhang, Shuiqing, additional, Huang, Shaomin, additional, Liu, Kailou, additional, Yu, Xichu, additional, Li, Dongchu, additional, Xu, Jiukai, additional, Zhao, Bingqiang, additional, Zhang, Lu, additional, Zhang, Huimin, additional, Zhou, Wei, additional, and Ai, Chao, additional

Published
2024
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22. Inhibition of Potato Fusarium Wilt by Bacillus subtilis ZWZ-19 and Trichoderma asperellum PT-29: A Comparative Analysis of Non-Targeted Metabolomics.

Author

Hao, Jianxiu, Wang, Zhen, Zhao, Yuanzheng, Feng, Shujie, Cui, Zining, Zhang, Yinqiang, Wang, Dong, and Zhou, Hongyou

Subjects
POTATOES, BACILLUS subtilis, AMINO acid metabolism, METABOLOMICS, TRICHODERMA, FUSARIUM, FUSARIUM diseases of plants
Abstract

Potato Fusarium Wilt is a soil-borne fungal disease that can seriously harm potatoes throughout their growth period and occurs at different degrees in major potato-producing areas in China. To reduce the use of chemical agents and improve the effect of biocontrol agents, the inhibitory effects of the fermentation broth of Bacillus subtilis ZWZ-19 (B) and Trichoderma asperellum PT-29 (T) on Fusarium oxysporum were compared under single-culture and co-culture conditions. Furthermore, metabolomic analysis of the fermentation broths was conducted. The results showed that the inhibitory effect of the co-culture fermentation broth with an inoculation ratio of 1:1 (B1T1) was better than that of the separately cultured fermentation broths and had the best control effect in a potted experiment. Using LC-MS analysis, 134 metabolites were determined and classified into different types of amino acids. Furthermore, 10 metabolic pathways had the most significant variations, and 12 were related to amino acid metabolism in the KEGG analysis. A correlation analysis of the 79 differential metabolites generated through the comprehensive comparison between B, T, and B1T1 was conducted, and the results showed that highly abundant amino acids in B1T1 were correlated with amino acids in B, but not in T. [ABSTRACT FROM AUTHOR]

Published
2024
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31. The Aqueous Extract of Brassica oleracea L. Exerts Phytotoxicity by Modulating H 2 O 2 and O 2 − Levels, Antioxidant Enzyme Activity and Phytohormone Levels.

Author

Wang, Yu, Zhao, Yuanzheng, Dong, Baozhu, Wang, Dong, Hao, Jianxiu, Jia, Xinyu, Zhao, Yuxi, Nian, Yin, and Zhou, Hongyou

Subjects
COLE crops, ABSCISIC acid, GERMINATION, PHYTOTOXICITY, BROOMCORN millet, SUPEROXIDE dismutase, WEED control
Abstract

Allelopathic interactions between plants serve as powerful tools for weed control. Despite the increasing understanding of the allelopathic mechanisms between different plant species, the inhibitory effects of B. oleracea on weed growth remain poorly understood. In this study, we conducted experiments to demonstrate that B. oleracea extract can suppress the germination of Panicum miliaceum L.varruderale Kit. seeds as well as of the roots, shoots and hypocotyl elongation of P. miliaceum seedlings. Furthermore, we observed that B. oleracea extract reduced the levels of hydrogen peroxide and superoxide anion in the roots while increasing the activities of catalase and ascorbate peroxidase. In the shoots, B. oleracea extract enhanced the activities of superoxide dismutase and peroxidase. Moreover, the use of the extract led to an increase in the content of phytohormones (indole-3-acetic acid, indole-3-acetaldehyde, methyl indole-3-acetate, N6-isoPentenyladenosine, dihydrozeatin-7-glucoside, abscisic acid and abscisic acid glucose ester) in P. miliaceum seedlings. Interestingly, the aqueous extract contained auxins and their analogs, which inhibited the germination and growth of P. miliaceum. This may contribute to the mechanism of the B. oleracea-extract-induced suppression of P. miliaceum growth. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Comparative study of PTFE filled different dopants as propellants for laser-electric hybrid thruster

Author

Tan Sheng, Jian Li, Ou Yang, Yu Zhang, Zhao Yuanzheng, and Jianjun Wu

Subjects
Propellant, 020301 aerospace & aeronautics, Materials science, Dopant, Doping, technology, industry, and agriculture, Oxide, Aerospace Engineering, 02 engineering and technology, Impulse (physics), Laser, 01 natural sciences, law.invention, chemistry.chemical_compound, 0203 mechanical engineering, chemistry, law, 0103 physical sciences, Specific impulse, Composite material, human activities, 010303 astronomy & astrophysics, Voltage
Abstract

This study presents a broad comparison of samples, which are made of polytetrafluoroethylene (PTFE) filled with different dopants according to the same preparation steps, as propellants on a laser-electric hybrid thruster with a common design base. The impulse bit, specific impulse, efficiency and discharge success rate of the propellant samples were measured and analyzed under the same operation. The experimental results illustrated that the dopants of alloy could improve the impulse bit, that of salt could promote the stability of the discharge process, and the samples doped with oxide performed dramatic specific impulse and thrust efficiency. And three representative samples were adopted to investigate the dependence of propulsion characteristics on different working parameters in the respective doping ratios. It is found that the sample doped with TiO2 in lower doping rate was expected to rank maximal specific impulse and efficiency at most operations, especially under the conditions of low laser energy, long discharge width and high initial voltage. And the samples doped with Co–Cr alloy in low doping ratio appeared better performance at low discharge width and laser energy, while those in high doping ratio performed greater performance at high discharge width and laser energy.

Published
2021

42. The ablation characteristics of laser-assisted pulsed plasma thruster with metal propellant

Author

Peng Zheng, Yu Zhang, Zhao Yuanzheng, Ou Yang, Jianjun Wu, and Tan Sheng

Subjects
Propellant, Materials science, Laser ablation, medicine.medical_treatment, technology, industry, and agriculture, Condensed Matter Physics, Ablation, Laser, humanities, law.invention, Electrically powered spacecraft propulsion, law, visual_art, medicine, Aluminium alloy, visual_art.visual_art_medium, Pulsed plasma thruster, Specific impulse, Composite material
Abstract

In this study, a laser-assisted pulsed plasma thruster (LA-PPT) with a new configuration is proposed as a novel electric propulsion thruster which separates laser ablation and electromagnetic acceleration. Because of the unique structure of the thruster, metals can also be used as propellants, and a higher specific impulse is expected. The ablation quality, ablation morphology, and ablation plume of various metals (aluminium alloy, red copper, and carbon steel) with different laser energies were studied experimentally. The ablation morphology and plume distribution of red copper were more uniform, as compared to those of other metals, and the ablation quality was higher, indicating its greater suitability for LA-PPT. The plume generated by nanosecond laser ablation of aluminium alloy expanded faster, which indicated that the response time of the thruster with aluminium alloy as the propellant was shorter. In addition, when the background pressure was 0.005 Pa, an obvious plume splitting phenomenon was observed in the ablation plume of the pulsed laser irradiating aluminium alloy, which may significantly reduce the utilisation rate of the propellant.

Published
2021

50. Application of MSCTA combined with VRT in the operation of cervical dumbbell tumors

Author

Wang, Wan, Lin, Jia, Knosp, Engelbert, Zhao, Yuanzheng, Xiu, Dianhui, and Guo, Yongchuan

Subjects
Case Report
Abstract

Cervical dumbbell tumor poses great difficulties for neurosurgical treatment and incurs remarkable local recurrence rate as the formidable problem for neurosurgery. However, as the routine preoperative evaluation scheme, MRI and CT failed to reveal the mutual three-dimensional relationships between tumor and adjacent structures. Here, we report the clinical application of MSCTA and VRT in three-dimensional reconstruction of cervical dumbbell tumors. From January 2012 to July 2014, 24 patients diagnosed with cervical dumbbell tumor were retrospectively analyzed. All patients enrolled were indicated for preoperative MSCTA/VRT image reconstruction to explore the three-dimensional stereoscopic anatomical relationships among neuroma, spinal cord and vertebral artery to achieve optimal surgical approach from multiple configurations and surgical practice. Three-dimensional mutual anatomical relationships among tumor, adjacent vessels and vertebrae were vividly reconstructed by MSCTA/VRT in all patients in accordance with intraoperative findings. Multiple configurations for optimal surgical approach contribute to total resection of tumor, minimal damage to vessels and nerves, and maximal maintenance of cervical spine stability. Preoperative MSCTA/VRT contributes to reconstruction of three-dimensional stereoscopic anatomical relationships between cervical dumbbell tumor and adjacent structures for optimal surgical approach by multiple configurations and reduction of intraoperative damages and postoperative complications.

Published
2015

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