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Political Attitudes of the New Social Class in China
Zhang Haidong,Deng Meiling 한국사회학회 2017 한국사회학회 사회학대회 논문집 Vol.2017 No.12
The rise and growth of a new social class in China has gradually seized the attention of the public, and has also become one of the hot topics in the academic world. Based on survey data, this paper discusses how to evaluate political attitudes of the new social class, and then compares differences in political attitudes between this new class and other social classes, and differences within this class. Five indicators, i.e. trust in government, perception of social security, consciousness of rights, identification with authority, and awareness of inequality, are adopted to measure political attitudes of this new class. The results show that compared with the middle class “inside the system,” this class has significantly lower trust in government. It shows no obvious preference for liberalism or conservatism compared with the lower middle class. And within this class, freelancing intellectuals tend to be more liberal than private employees and employers.
MEILING ZOU,HAN ZHU,PAN WANG,MINGLIANG DU,MING ZHANG,SHIYONG BAO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.3
In this paper, epigallocatechin gallate (EGCG) was used as a green reductant both for thefabrication of soluble reduced graphene oxide (rGO) and the synthesis of Au nanoparticles/rGOnanocomposite. Fourier transform infrared (FTIR) spectra con¯rmed the e±cient removal of theoxygen-containing groups in graphene oxide (GO) through the reduction act of EGCG. Aunanoparticles (AuNPs) were anchored onto the rGO sheets by heating the mixed solution of rGOand chloroauric acid at 65?C using EGCG as reductant. Transmission electron microscopy(TEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS) wereemployed to characterize the resulting nanocomposite. Due to the chelating e®ect of polyhydroxyEGCG, AuNPs with diameters of ? 20 – 50 nm were stably decorated onto both sides of the rGOsheets. Because this reduction method avoids the use of toxic reagents, AuNPs/rGO nano-composite would be eco-friendly, and it might be useful not only for electronic devices but also forbiocompatible materials in the future applications.
Shengwei Zhang,Lihong Cai,Thi Anh Nguyet Nguyen,Meiling Geng,Kun Gao,Sung-Tae Hong,Moon-Jo Kim 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.10 No.2
Aluminum clad steel (ACS) sheets are heat treated by electrically assisted rapid heat treatment (subsecond duration) to balance their strength and ductility. The results of microstructural analysis show that the electric current results in the formation of different intermetallic compounds (IMCs) attributed to the rapid heating and the athermal effect of the electric current. The different IMCs affect the interfacial bonding strength and the mechanical properties of the ACS sheet. The tensile tests suggest that the yield strength of the ACS sheet gradually decreases, while the elongation gradually increases up to the current density of 170 A/mm2. In contrast, a higher current density of 190 A/mm2 dramatically increases the thickness of the IMC layer, resulting in premature fracture of the ACS sheet due to early interfacial debonding. The fracture mechanism is found to be a matrix-dominated fracture or interfacial IMC-dominated fracture depending on the applied current density. Moreover, the U-shape forming test confirms that the enhanced interfacial bonding strength and favorable formability of the ACS sheet can be achieved by repeatedly applying the electric pulses of 170 A/mm2 four times rather than using the single electric pulse of 190 A/mm2 due to the formation of a thick IMC layer under the high current density of 190 A/mm2. The present study proves that the electrically assisted rapid heat treatment is an efficient method to balance the strength and formability of the ACS sheet.
Zhengyang Pan,Guoxi Xu,Yan Zhang,Meiling Wu,Jiahui Yu,Xujun He,Wei Zhang,Junfeng Hu The Korean Gastric Cancer Association 2024 대한위암학회지 Vol.24 No.3
Purpose: Gastric cancer (GC) is among the deadliest malignancies and the third leading cause of cancer-related deaths worldwide. Galectin-1 (Gal-1) is a primary protein secreted by cancer-associated fibroblasts (CAFs); however, its role and mechanisms of action of Gal-1 in GC remain unclear. In this study, we stimulated GC cells with exogenous human recombinant galectin-1 protein (rhGal-1) to investigate its effects on the proliferation, migration, and resistance to cisplatin. Materials and Methods: We used simulated rhGal-1 protein as a paracrine factor produced by CAFs to induce GC cells and investigated its promotional effects and mechanisms in GC progression and cisplatin resistance. Immunohistochemical (IHC) assay confirmed that Gal-1 expression was associated with clinicopathological parameters and correlated with the expression of neuropilin-1 (NRP-1), c-JUN, and Wee1. Results: Our study reveals Gal-1 expression was significantly associated with poor outcomes. Gal-1 boosts the proliferation and metastasis of GC cells by activating the NRP-1/C-JUN/Wee1 pathway. Gal-1 notably increases GC cell resistance to cisplatin The NRP-1 inhibitor, EG00229, effectively counteracts these effects. Conclusions: These findings revealed a potential mechanism by which Gal-1 promotes GC growth and contributes to chemoresistance, offering new therapeutic targets for the treatment of GC.
Sperm maturation screening and the effect of ecdysone on sperm development of silkworm Bombyx mori
Cheng Hao,Wang Yanyan,Chang Meiling,Zhang Kun,Cai Zhiyan,Qian Yuxin,Li Dandan 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.2
There are two sperm morphs of silkworm, the nucleated spermatozoa (eupyrene) and anucleated spermatozoa (apyrene). Eupyrene sperm cannot complete fertilization successfully without the apyrene sperm. Here a modified rapid and efficient method for sperm identification was developed, after 10 s of fixation in para formaldehyde and 30 s of 4 ′ 6-diamidino-2-phenylindole (DAPI) or propidium Iodide (PI) staining, the sperm bundles can be detected easily using a fluorescence microscope. Sperm maturation process of silkworm from the fifth instar larvae to the adult was described with the above method, the precise time of earliest elongate apyrene bundles was detected on day 2 of pre-pupation, with a ratio of 5% in total sperm bundles, after which the percentage of apyrene sperm bundles increased rapidly and attained a relatively stable ratio of 75% at the end of pupation and nearly 80% after eclosion. Delayed mating leads to apyrene sperm accumulation and damaged fertilization. Previous study showed that ecdysone can increase the frequency of apyrene sperm bundles in vitro. Here 20-hydroxyecdysone (20E) was injected into hemolymph of the 2-d-old fifth instar larvae, the worms entered into mounting period after three days injection, but no apyrene sperm bundles were induced unless day 2 of pre-pupation. Interestingly, maturation of eupyrene sperm bundles were accelerated, and the ratio of eupyrene sperm bundles increased and exhibited a dose-dependent effect after 20E injection, which indicated that the development of eupyrene sperm can be accelerated by ecdysone before pupation of silkworm in vivo. These results will provide new clues for lepidopteran pest control.
SHIYONG BAO,HAN ZHU,PAN WANG,MEILING ZOU,MINGLIANG DU,MING ZHANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.6
A facile and green route was introduced to synthesize Pt nanoparticles (PtNPs) immobilized on Cu2O octahedrons to form Cu2O–Pt hierarchical heterostructure. Transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were employed to study their morphology, chemical and crystallographic properties of the Cu2O–Pt hierarchical heterostructure. These novel Cu2O–Pt hierarchical heterostructures show fascinating degradations of methylene blue (MB), due to the suppressed electron/hole recombination phenomena and the efficient ability to capture the light.