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Enhanced magnetic properties of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Ni alloy

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Rare Metals 2023年第6期42卷 1829-1835页

作者： Shi-Zhong An Xiao-Sen Li Wu-hui Li Gui-Hong Lv Feng-zhang Ren School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang471023China Henan Key Laboratory of Nonferrous Materials Science and Processing Technology Longmen LaboratoryProvincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing TechnologyLuoyang471023China

In this work,we prepared SmCo/FeCo nanocomposite magnets with an enhanced magnetic performance by doping eutectic Sm-Ni *** magnets without Sm-Ni alloy,with a grain size of 5-12 nm and an average size of~ 9 nm,are composed of Sm_(2)Co_(17) phase and FeCo phase,leading to a relatively low remanence of 0.0365A·m^(2)·g^(-1) and coercivity of 0.15 T,*** doping 2.5 wt% Sm-Ni alloy,there is no obvious change on the grain size of SmCo/FeCo magnets.

关键词： magnets doping SmCo

Microstructure evolution and passivation quality of hydrogenated amorphous silicon oxide(a-SiOx:H) on〈100〉- and 〈111〉-orientated c-Si wafers

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Chinese Physics B 2020年第3期29卷 480-487页

作者： Jun-Fan Chen Sheng-Sheng Zhao Ling-Ling Yan hui-Zhi Ren Can Han De-Kun zhang Chang-chun Wei Guang-Cai Wang Guo-Fu Hou § Ying Zhao Xiao-Dan zhang Institute of Photoelectronic Thin Film Devices and Technology of Nankai University Tianjin 300350China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin 300350China Engineering Center of Thin Film Photoelectronic Technology of Ministry of Education Tianjin 300350China Sino-Euro Joint Research Center for Photovoltaic Power Generation of Tianjin Tianjin 300350China

Hydrogenated amorphous silicon oxide(a-SiOx:H) is an attractive passivation material to suppress epitaxial growth and reduce the parasitic absorption loss in silicon heterojunction(SHJ) solar cells. In this paper, a-SiOx:H layers on different orientated c-Si substrates are fabricated. An optimal effective lifetime(τ(eff)) of 4743 μs and corresponding implied opencircuit voltage(iV(oc)) of 724 mV are obtained on〈100〉-orientated c-Si wafers. While τ(eff) of 2429 μs and iV_(oc) of 699 mV are achieved on 111-orientated substrate. The FTIR and XPS results indicate that the a-SiOx:H network consists of SiOx(Si-rich), Si–OH, Si–O–SiHx, SiO2 ≡ Si–Si, and O3 ≡ Si–Si. A passivation evolution mechanism is proposed to explain the different passivation results on different c-Si wafers. By modulating the a-SiOx:H layer, the planar silicon heterojunction solar cell can achieve an efficiency of 18.15%.

关键词： a-SiO_x:H orientated wafers silicon heterojunction

Genomic features of meiotic crossovers in diploid potato

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Horticulture Research 2023年第6期10卷 144-153页

作者： Xiuhan Jiang Dawei Li hui Du Pei Wang Liang Guo Guangtao Zhu chunzhi zhang National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong 518120China The AGISCAAS-YNNU Joint Academy of Potato Sciences Yunnan Normal UniversityKunmingYunnan 650500China

Meiotic recombination plays an important role in genome evolution and crop ***(Solanum tuberosum L.)is the most important tuber crop in the world,but research about meiotic recombination in potato is ***,we resequenced 2163 F2 clones derived from five different genetic backgrounds and identified 41945 meiotic *** recombination suppression in euchromatin regions was associated with large structural *** also detected five shared crossover *** number of crossovers in each F2 individual from the accession Upotato 1 varied from 9 to 27,with an average of 15.5,78.25%of which were mapped within 5 kb of their presumed *** show that 57.1%of the crossovers occurred in gene regions,with poly-A/T,poly-AG,AT-rich,and CCN repeats enriched in the crossover *** recombination rate is positively related with gene density,SNP density,Class II transposon,and negatively related with GC density,repeat sequence density and Class I *** study deepens our understanding of meiotic crossovers in potato and provides useful information for diploid potato breeding.

关键词： breeding tuberosum crossover

Cold exposure and capsaicin promote 1,2-dimethylhyrazine-induced colon carcinogenesis in rats correlates with extracellular matrix remodeling

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World Journal of Gastroenterology 2021年第39期27卷 6615-6630页

作者： Jing-chun Qin Wei-Tao Yu hui-Xuan Li Yu-Qi Liang Fei-Fei Nong Bin Wen Institute of Science and Technology Innovation Center Guangzhou University of Chinese MedicineGuangdong 530001Guangdong ProvinceChina Liuzhou People’s Hospital Guangxi545006Guangxi Province China Traditional Chinese Medicine Department The Second People’s Hospital of LianyungangLianyungang 222000Jiangsu ProvinceChina National Center for Respiratory Medicine Guangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouState Key Laboratory of Respiratory Disease and National Clinical Research Center for Respiratory DiseaseGuangdong 510000Guangdong ProvinceChina

BACKGROUND Extracellular matrix(ECM)remodeling and stiffening,which are correlated with tumor malignancy,drives tumor ***,the relationship between ECM remodeling and rat experimental model of 1,2-dimethylhyrazine(DMH)-induced colorectal cancer(CRC)imposed by cold and capsaicin exposure remains *** To explore the effects of cold exposure and capsaicin on ECM remodeling and ECM enzymes in DMH-induced *** For histopathological analysis,the sections of colon tissues were stained with hematoxylin and eosin,Masson’s trichrome,Picrosirius red,and Weigert’s Resorcin-Fuchsin to observe the remodeling of collagen and ***,the protein expression level of type I collagen(COL I),type 3 collagen(COL III0,elastin,matrix metalloproteinase(MMP)1,MMP2,MMP9,and tissue-specific matrix metalloproteinase 1(TIMP1)was assessed by *** messenger RNA(mRNA)levels of COL I,COL III,elastin,and lysyl oxidase-like-2(LOXL2)in the colon tissues of rats was measured by reverse-transcriptase quantitative polymerase chain *** Although no differences were observed in the proportion of adenomas,a trend towards the increase of invasive tumors was observed in the cold and capsaicin *** cold exposure group had a metastasis rate compared with the other ***,abnormal accumulation of both collagen and elastin was observed in the cold exposure and capsaicin ***,collagen quantitative analysis showed increased length,width,angle,and straightness compared with the DMH *** deposition and straightness were significantly increased in the cold exposure group compared with the capsaicin *** exposure and capsaicin significantly increased the protein levels of COL I,elastin,and LOXL2 along with increases in their mRNA levels in the colon tissues compared with the DMH group,while COL III did not show a significant ***,in immunohistochemical evaluations,MMP1,MMP2,MMP9,an

关键词： Colon cancer Cold exposure Capsaicin Extracellular matrix remodeling Extracellular matrix enzymes

Relations Between Photosynthetic Parameters and Seed Yields of Adzuki Bean Cultivars (Vigna angularis)

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Journal of Integrative Agriculture 2012年第9期11卷 1453-1461页

作者： SONG hui GAO Jin-feng GAO Xiao-li DAI hui-ping zhang Pan-an FENG Bai-li WANG Peng-ke CHAI Yan State Key Laboratory of Crop Stress Biology in Arid Areas Ministry of Science and Technology/College of Agriculture Northwest A&F University Yangling 712100 P.R.China College of Life Science Northwest A&F University Yangling 712100 P.R.China

The study comparatively examined the leaf photosynthetic capacities of different adzuki bean cultivars, high-yield 2000-75 and Jihong 9218, and low-yield Hongbao 1 and Wanxuan 1 from flowering to ripening. It showed that after flowering, the leaves of the cultivars gradually aged, the leaf chlorophyll （Chl.）, soluble protein （SP） contents, net photosynthetic rates （Pn）, transpiration rates （Tr） and stomatal conductance （G） of the cultivars tended to decline, but the leaf intercellular CO2 concentration （Ci） of the cultivars tended to rise. The leaf photosynthetic capacities of the cultivars decreased gradually from the lower to the upper nodes. The dry seed yields of the cultivars were positively correlated with their leaf Chl., SP, Pn, and Tr and Gs, and negatively associated with their leaf Ci. At the late growth stages, the high-yield cultivars maintained higher leaf Chl. contents, SP contents, Pn, Tr, and Gs than the low-yield cultivars, indicating that leaf photosynthetic capacity was one of important yield-affecting factors of adzuki bean. Therefore, it was important for a crop at the crucial stage of yield formation to maintain a high leaf chlorophyll content and a high leaf photosynthetic capacity and delay leaf aging.

关键词： adzuki bean net photosynthetic rate chlorophyll content dry seed yield

Performance evaluation of CLM5.0 in simulating liquid soil water in high mountainous area,Northwest China

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Journal of Mountain Science 2023年第7期20卷 1865-1883页

作者： zhang Lan-hui NING Feng-wei BAI Xu-liang ZENG Xuan HE Chan-sheng Key Laboratory of West China’s Environmental System(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Department of Geography Western Michigan UniversityKalamazooMichigan 49008USA

The model performance in simulating soil water content(SWC) is crucial for successfully modeling earth’s system,especially in high mountainous *** this study,the performance of Community Land Model 5.0(CLM5.0) in simulating liquid SWC was evaluated against observations from nine in-situ sites in the upper reach of the Heihe River Watershed(HRW),Northwest *** CLM5.0 shows reliable performance in the study area with correlation coefficients(R) ranging between 0.79–0.93,root mean standard errors(RMSE)ranging between 0.044–0.097 m^(3)/m^(3),and the mean bias(BIAS) ranging between-0.084–0.061 m^(3)/m^(3).The slightly worse performance of CLM5.0 than CLM4.5 on alpine meadow and grassland is mainly caused by the revised canopy interception *** CLM5.0 overestimates interception and underestimates evapotranspiration(ET) on both alpine meadow and grassland during the growth *** systematical overestimations at all the grassland sites indicate that the underestimation of ET is much larger than the overestimation of interception on grassland during growth period,while the errors of simulated interception and ET are partially canceled out on alpine ***,the underestimation of ET is more responsible for the overestimation of SWC than the overestimation of interception in the high mountainous *** is necessary to estimate reasonable empirical parameter α(proportion of leaf water collection area) in interception parameterization scheme and further improve the dry surface layerbased soil evaporation resistance parameterization introduced in CLM5.0 in future *** performance of CLM5.0 is better under completely frozen stage than thawing stage and freezing stage,because of low variations of liquid SWC caused by extremely low hydraulic conductivity of *** underestimation of liquid SWC under frozen state is caused by underestimation of soil temperature,which leads to more ice mass and less liquid water in total water conten

关键词： Performance evaluation Soil water content CLM5.0 Evapotranspiration High mountainous area

Protective effects of quercetin against H2O2 induced KGN cells injury

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Traditional Medicine Research 2024年第2期9卷 1-7页

作者： Ning zhang hui-Xia zhang Xiao-Ling Ma Jin-Ni Hong Reproductive Medicine Center Lanzhou University First HospitalLanzhou 730030China Department of Traditional Chinese Medicine Guangdong Provincial People's Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510080China

Background:Oxidative stress is one of the key contributors to cellular senescence and ovarian *** has a variety of physiological activities such as *** that hydrogen peroxide can cause oxidative damage to cells,the present study is designed to verify the protective effect of quercetin on human ovarian granulosa tumor cell line under oxidative ***:Cell counting kit-8 and lactate dehydrogenase assays examined cell viability and *** cytometry detected reactive oxygen species *** level was measured to analyze the oxidation *** apoptosis was evaluated by Hoechst 33258 staining,acridine orange/Ethidium Bromide staining and western *** mitochondrial structure was observed under a transmission electron *** membrane integrity was detected by JC-1 staining and western ***:Hydrogen peroxide could induce cell injury,promote reactive oxygen species accumulation,and lead to glutathione *** peroxide also resulted in mitochondrial morphological damage and depolarization,which activate caspase3/9 ***,quercetin could mitigate these ***:Present study found that hydrogen peroxide induced oxidative stress and mitochondrial apoptosis of human ovarian granulosa tumor cell line cells,which could be attenuated by quercetin.

关键词： oxidative stress granulosa cells apoptosis mitochondria quercetin

The Circadian System Is Essential for the Crosstalk of VEGF-Notch-mediated Endothelial Angiogenesis in Ischemic Stroke

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Neuroscience Bulletin 2023年第9期39卷 1375-1395页

作者： Yuxing zhang Xin Zhao chun Guo Ying zhang Fukang Zeng Qian Yin Zhong Li Le Shao Desheng Zhou Lijuan Liu Department of Neurology The First Hospital of Hunan University of Chinese MedicineChangsha410007China Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases Changsha410208China Hunan University of Chinese Medicine Changsha410006China Laboratory of Prevention and Transformation of Major Diseases in Internal Medicine of Traditional Chinese Medicine Changsha410007China

Ischemic stroke is a major public health problem *** the circadian clock is involved in the process of ischemic stroke,the exact mechanism of the circadian clock in regulating angiogenesis after cerebral infarction remains *** the present study,we determined that environmental circadian disruption(ECD)increased the stroke severity and impaired angiogenesis in the rat middle cerebral artery occlusion model,by measuring the infarct volume,neurological tests,and angiogenesis-related *** further report that Bmal1 plays an irreplaceable role in *** of Bmal1 promoted tube-forming,migration,and wound healing,and upregulated the vascular endothelial growth factor(VEGF)and Notch pathway protein *** promoting effect was reversed by the Notch pathway inhibitor DAPT,according to the results of angiogenesis capacity and VEGF pathway protein *** conclusion,our study reveals the intervention of ECD in angiogenesis in ischemic stroke and further identifies the exact mechanism by which Bmal1 regulates angiogenesis through the VEGF-Notch1 pathway.

关键词： Circadian clock Ischemic stroke Angiogenesis VEGF Notch pathway

Research progress on refractory composition and deformability of shell molds for TiAl alloy castings

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China Foundry 2018年第1期15卷 1-10页

作者： chun-ling Bao Shuang-qi zhang Yu-yan Ren You-wei zhang Hua-sheng Xie Jun Zhao Titanium Alloy Division Shenyang Research Institute of Foundry School of Materials Science and Engineering Shenyang University of Technology

At present, most TiAl components are produced by an investment casting process. Environmental and economic pressures have, however, resulted in a need for the industry to improve the current casting quality, reduce manufacturing costs and explore new markets for the process. Currently, the main problems for investment casting of TiAl alloys are cracks, porosities, and surface defects. To solve these problems, many studies have been conducted around the world, and it is found that casting defects can be reduced by improving composition and properties of the shell molds. It is important to make a summary for the related research progress for quality improvement of TiAl castings. So, the development on refractory composition of shell molds for TiAl alloy investment castings was reviewed, and research progress on deformability of shell mold for TiAl alloy castings both at home and abroad in recent years was introduced. The existing methods for deformability characterization and methods for improving the deformability of shell molds were summarized and discussed. The updated advancement in numerical simulation of TiAl alloy investment casting was presented, showing the necessity for considering the deformability of shell mold during simulation. Finally, possible research points for future studies on deformability of shell mold for TiAl alloy investment casting were proposed.

关键词： TiAl based alloys investment casting shell mold deformability