Search

Your search keyword '"Zheng, L. H."' showing total 131 results
Start Over Author "Zheng, L. H."
131 results on '"Zheng, L. H."'

2. Phase equilibria of the Al-Co-Er system at 400°C and 600°C

Author

Zheng L.-H., Zhang L.-G., Zhao F.-Y., Liu L.-B., Wang D., and Wu C.-J.

Subjects
phase equilibria, al-co-er, aluminum alloys, Mining engineering. Metallurgy, TN1-997
Abstract

The 400°C and 600°C isothermal sections of the Al–Co–Er system were studied assisted with X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA) techniques. 18 three-phase fields were identified in the 400°C isothermal section. The maximum solid solubilities of Al in Co3Er and Co2Er were 13.93 at.%, and 16.13 at.%, respectively whereas the maximum solid solubilities of Co in Al2Er, Al2Er3 and AlEr2 were 6.93 at.%, 6.65 at.%, and 6.49 at.%, respectively. The solid solution range of λ is from 22.22 at.% Al to 44.44 at.% Al while the 600°C isothermal section included 20 three-phase fields. The maximum solid solubilities of Al in Co17Er2 and Co7Er2 were 10.17 at.% and 10.24 at.%, respectively. The maximum solid solubilities of Co in Al2Er and Al2Er3 were 3.63 at.% and 2.01 at.%, respectively.

Published
2021
Full Text
View/download PDF

10. Physicochemical properties of a non-reducing maltoheptaose prepared by dual-enzyme cascade reaction from starch.

Author

Pan, Y., Zhen, Y.-H., Jiang, B., Zheng, L.-H., Chen, J.-J., and Zhang, T.

Subjects
MAILLARD reaction, MALTODEXTRIN, CYCLODEXTRINS, MELTING points, STARCH, HUMIDITY, FOOD industry
Abstract

The existence of a reducing end in the structure of maltodextrin can limit its applications as undesirable Maillard reaction would occur in some food processing steps. Consequently, a non-reducing maltoheptaose (N-G7) with a single degree of polymerisation was prepared through a cascade reaction of cyclodextrinase and maltooligosyltrehalose synthase, using β-cyclodextrin as substrate. The physicochemical properties of N-G7 were investigated. N-G7 exhibited low moisture absorption ability (8.91 and 18.02% at 43 and 81% relative humidity, respectively), excellent pH stability and thermostability (less than 10% N-G7 was hydrolysed between pH 4 and 10, even at 100°C), and a melting point higher than that of maltodextrin, as well as a typical gel-like behaviour. Most importantly, the results of Maillard reaction indicated that N-G7 was considered to be non-reducing, which suggested that it could be used in food processing where Maillard reaction should be avoided. Overall, the present work may provide important implications for the development and application of N-G7 in food products. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

24. CHCHD2 decreases docetaxel sensitivity in breast cancer via activating MMP2.

Author

MA, L., ZHENG, L.-H., ZHANG, D.-G., and FAN, Z.-M.

Abstract

OBJECTIVE: This study aims to clarify the influences of CHCHD2 and MMP2 on docetaxel resistance in breast cancer. PATIENTS AND METHODS: Differential levels of CHCHD2 in breast cancer and para-tumor tissues were detected. The relationship between CHCHD2 and prognosis in breast cancer patients was analyzed. After generating Docetaxel-resistant breast cancer cell lines (MCF-7/DTX and SKBR3/DTX), the regulatory effects of CHCHD2 on proliferative and migratory potentials were assessed by Cell Counting Kit-8 (CCK-8) and transwell assay, respectively. The interaction between CHCHD2 and MMP2 was tested by Western blot and Pearson correlation test. At last, the involvement of MMP2 in CHCHD2-regulated proliferation and migration in Docetaxel-resistant breast cancer cells was analyzed. RESULTS: CHCHD2 was upregulated in breast cancer tissues. It predicted high incidence of distant metastasis and poor prognosis in breast cancer patients. Proliferation inhibition rate was lower in MCF-7/DTX and SKBR3/DTX cells compared with their parental cells. After knockdown of CHCHD2 in MCF-7/DTX and SKBR3/DTX cells, their proliferative and migratory potentials were markedly reduced. MMP2 was upregulated in breast cancer tissues, and its level was positively regulated by CHCHD2. Overexpression of MMP2 could reverse the regulatory effects of CHCHD2 on proliferative and migratory potentials in MCF-7/DTX and SKBR3/DTX cells. CONCLUSIONS: Upregulated CHCHD2 in breast cancer is related to distant metastasis rate and poor prognosis. CHCHD2 and MMP2 are positively correlated to each other. CHCHD2 stimulates proliferative and migratory potentials in Docetaxel-resistant breast cancer cells by upregulating MMP2. [ABSTRACT FROM AUTHOR]

Published
2020

48. Mode-locked Tm,Ho:YAP laser around 21 μm

Author

Yang, K. J., primary, Heinecke, D. C., additional, Kölbl, C., additional, Dekorsy, T., additional, Zhao, S. Z., additional, Zheng, L. H., additional, Xu, J., additional, and Zhao, G. J., additional

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results