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26. Properties of aniline or O-phenylenediamine/YBCO hybrid materials

Author

LIN Shan, YUAN Hong-mei, WANG Dong, CHEN Shu-qing, ZHANG Wen-gong, and CHEN Li-hui

Subjects
aniline, o-phenylenediamine, ybco, hybrid, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

YBa2Cu3O7-δ(YBCO) bulk material prepared by high temperature solid state reaction was milled and dispersed through ultrasonic process in ethanol to prepare nanoscale YBCO/ethanol sol. Then it was mixed with aniline or O-phenylenediamine and the organic/YBCO hybrid materials were obtained after concentration and being dried in vacuum. The influence of the organic on YBCO’s chemical composition, phase, elemental valence and magnetic properties was studied by Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and vibrating sample magnetometer(VSM). The results show that the infrared absorption of YBCO is not affected by the aniline or O-phenylenediamine within 0.05%-5%(mass fraction, the same below), however the intensity of the XRD peaks is significantly increased. The interaction between the N atom in aniline or O-phenylenediamine and the Y atom in YBCO is stronger compared with N-Ba or N-Cu. The superconducting transition temperature Tc and magnetization M of YBCO are significantly affected by the content of N element in the hybrid materials. When the content of N element exceeds 1%, Tc is significantly decreased and Mmin is increased accordingly.

Published
2021
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30. Effect of short neuropeptide F signaling on larval feeding in Mythimna separata.

Author

Li, Mei‐Mei, Yang, Qi, Chen, Li‐Hui, Li, Yan‐Ying, Wu, Jun‐Xiang, and Xu, Xiang‐Li

Subjects
RNA interference, NEUROPEPTIDES, GREEN fluorescent protein, SMALL interfering RNA, TRANSMEMBRANE domains, DOUBLE-stranded RNA, TREHALOSE
Abstract

Mythimna separata is a notorious phytophagous pest which poses serious threats to cereal crops owing to the gluttony of the larvae. Because short neuropeptide F (sNPF) and its receptor sNPFR are involved in a diversity of physiological functions, especially in functions related to feeding in insects, it is a molecular target for pest control. Herein, an sNPF and 2 sNPFRs were identified and cloned from M. separata. Bioinformatics analysis revealed that the sNPF and its receptors had a highly conserved RLRFamide C‐terminus and 7 transmembrane domains, respectively. The sNPF and its receptor genes were distributed across larval periods and tissues, but 2 receptors had distinct expression patterns. The starvation‐induced assay elucidated that sNPF and sNPFR expression levels were downregulated under food deprivation and recovered with subsequent re‐feeding. RNA interference knockdown of sNPF, sNPFR1, and sNPFR2 by injection of double‐stranded RNA into larvae not only suppressed food consumption and increased body size and weight, but also led to decrease of glycogen and total lipid contents, and increase of trehalose compared with double‐stranded green fluorescent protein injection. Furthermore, molecular docking was performed on the interaction mode between sNPFR protein and its ligand sNPF based on the 3‐dimensional models constructed by AlphaFold; the results indicated that both receptors were presumably activated by the mature peptide sNPF‐2. These results revealed that sNPF signaling played a considerably vital role in the feeding regulation of M. separata and represents a potential control target for this pest. [ABSTRACT FROM AUTHOR]

Published
2024
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38. Recycled ancient ghost carbonate in the Pitcairn mantle plume

Author

Wang, Xiao-Jun, Chen, Li-Hui, Hofmann, Albrecht W., Hanyu, Takeshi, Kawabata, Hiroshi, Zhong, Yuan, Xie, Lie-Wen, Shi, Jin-Hua, Miyazaki, Takashi, Hirahara, Yuka, Takahashi, Toshiro, Senda, Ryoko, Chang, Qing, Vaglarov, Bogdan S., and Kimura, Jun-Ichi

Published
2018

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