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22篇 您的检索式:作者名="ZHOU QingLi"
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1Optical property and spectroscopy studies on the selected lubricating oil in the terahertz range显示文摘The optical property and spectroscopy of selected kinds of lubricating oil are studied based on the terahertz time-domain spectroscopy (THz-TDS) in the spectral range of 0.3-1.6 THz. The samples are classified by their characteristics via the near-infrared spectrum. The experimental results reveal that lubricating oil is more sensitive in the range of terahertz than in the near-infrared,and the specific kinds of lubricating oil can be identified according to their different spectral features in the terahertz range. The THz-TDS technology applied to lubricating oil analysis has potentially significant impact on the petroleum field.TIAN Lu ZHOU QingLi JIN Bin ZHAO Kun ZHAO SongQing SHI YuLei ZHANG CunLin 2009Science China(Physics,Mechanics & Astronomy)2009,52,12:25
2Land Use Effects on Soil Organic Carbon, Microbial Biomass and Microbial Activity in Changbai Mountains of Northeast China显示文摘Land use changes are known to alter soil organic carbon(SOC) and microbial properties, however, information about how conversion of natural forest to agricultural land use as well as plantations affects SOC and microbial properties in the Changbai Mountains of Northeast China is meager. Soil carbon content, microbial biomass carbon(MBC), basal respiration and soil carbon mineralization were studied in five selected types of land use: natural old-growth broad-leaved Korean pine mixed forest(NF); spruce plantation(SP) established following clear-cutting of NF; cropland(CL); ginseng farmland(GF) previously under NF; and a five-year Mongolian oak young forest(YF) reforested on an abandoned GF, in the Changbai Mountains of Northeast China in 2011. Results showed that SOC content was significantly lower in SP, CL, GF, and YF than in NF. MBC ranged from 304.4 mg/kg in CL to 1350.3 mg/kg in NF, which was significantly higher in the soil of NF than any soil of the other four land use types. The SOC and MBC contents were higher in SP soil than in CL, GF, and YF soils, yielding a significant difference between SP and CL. The value of basal respiration was also higher in NF than in SP, CL, GF, and YF. Simultaneously, higher values of the metabolic quotient were detected in CL, GF, and YF soils, indicating low substrate utilization of the soil microbial community compared with that in NF and SP soil. The values of cumulative mineralized carbon and potentially mineralized carbon(C0) in NF were significantly higher than those in CL and GF, while no significant difference was observed between NF and SP. In addition, YF had higher values of C0 and C mineralization rate compared with GF. The results indicate that conversion from NF into agricultural land(CL and GF) uses and plantation may lead to a reduction in soil nutrients(SOC and MBC) and substrate utilization efficiency of the microbial community. By contrast, soils below SP were more conducive to the preservation of soil organic matter, which was reflected in the comparison of microbial indicators among CL, GF, and YF land uses. This study can provide data for evaluating soils nutrients under different land use types, and serve as references for the rational land use of natural forest in the study area.FANG Xiangmin WANG Qingli ZHOU Wangming ZHAO Wei WEI Yawei NIU Lijun DAI Limin 2014Chinese Geographical Science2014,24,3:16
3Aqueous extract of Taxus Chinensis (Pilger) Rehd inhibits lung carcinoma A549 cells through the epidermal growth factor receptor/mitogen-activated protein kinase pathway in vitro and in vivo显示文摘OBJECTIVE:To explore the anticancer mechanismof aqueous extract of Taxus Chinensis (Pilger) Rehd (AETC).METHODS: The serum pharmacological method was used to avoid interference from administration of the crude medicinal herbs. Eight purebred New Zealand rabbits were used for preparation of serum containing various concentrations of AETC. Forty-eightBalb/c-nu mice were used for in vivo experiments. The effects of serum containing AETC on the proliferation of A549 cells and expression levels of the epidermal growth factor receptor/mitogen-activated protein kinase(EGFR/MAPK) pathway-related proteins in vitro were investigated. Additionally, the effects on the growth of A549 xenografts in nudemice,and expression levels of the EGFR/MAPK pathway-related proteins in the xenografts,were investigated.RESULTS: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide(MTT) assay revealed that the serum containing AETC significantly decreased the viability of A549 cells in a dose-dependent manner.Western blot showed that the serum containing various concentrations of AETC strongly reduced the levels of phospho-Jun N-terminal kinase(p-JNK) and phospho-extracellular signal-regulated kinase1/2(ERK1/2) while it increased the level of p-p38. However, no significant effects on the expression levels of JNK, ERK1/2, and p38 MAPK were found. In addition, an anticancer effect from AETC was observed invivo in the Balb/c-nu mice bearing A549xenografts.CONCLUSION: AETC has significant effects on the growth of A549 xenografts and on the activity of the EGFR/MAPK pathway. Therefore, AETC may be beneficial in lung carcinoma treatment.Qijin Shu Minhe Shen Binbin Wang Qingli Cui Xiaoying Zhou Luming Zhu 2014Journal of Traditional Chinese Medicine2014,34,3:10
4Spectrum features of commercial derv fuel oils in the terahertz region显示文摘Characteristic spectra in the 0.5-2.5 terahertz (THz) range of three commercial derv fuel oils have been obtained using THz time-domain spectroscopy and calculated using density functional theory.The simulated results and experimental absorption curves suggest that the skeleton vibration is predominant in the THz region,and the absorption bumps of diesels are a superposition of various components.The investigation demonstrates that different diesels can be distinguished using THz time-domain spectroscopy and THz technology is a promising method to detect the composition and properties of diesels via chemical analysis.ZHAO Hui ZHAO Kun TIAN Lu ZHAO SongQing ZHOU QingLi SHI YuLei ZHAO DongMei ZHANG CunLin 2012Science China(Physics,Mechanics & Astronomy)2012,55,2:8
5Carbon Stock of Larch Plantations and Its Comparison with an Old-growth Forest in Northeast China显示文摘The overall goal of this study was to understand carbon(C) stock dynamics in four different-aged Japanese larch(Larix kaempferi) plantations in Northeast China that were established after clear-cutting old-growth Korean pine deciduous forests. Four Japanese larch plantations which were at 10, 15, 21, and 35 years old and an old-growth Korean pine deciduous forest which was 300 years old in Northeast China were selected and sampled. We compared the C pools of biomass(tree, shrub and herb), litterfall(LF), and soil organic carbon(SOC) among them. The biomass C stock of larch plantation at 10, 15, 21, and 35 years old was 26.8, 37.9, 63.6, and 83.2 Mg/ha, respectively, while the biomass C stock of the old-growth Korean pine deciduous forest was 175.1 Mg/ha. The SOC stock of these larch plantations was 172.1, 169.7, 140.3, and 136.2 Mg/ha respectively, and SOC stock of 170.4 Mg/ha in the control of old-growth forest. The biomass C stock increased with stand age of larch plantations, whereas SOC stock decreased with age, and C stock of LF did not change significantly(P > 0.05). The increase of biomass C offset the decline of SOC stock with age, making total carbon stock(TCS) of larch plantations stable from stand ages of 10–35 years. The TCS in larch plantations was much smaller than that in the old-growth forest, suggesting that the conversion of old-growth forests to young larch plantations releases substantial C into the atmosphere.QI Guang CHEN Hua ZHOU Li WANG Xinchuang ZHOU Wangming QI Lin YANG Yuhua YANG Fengling WANG Qingli DAI Limin 2016Chinese Geographical Science2016,26,1:6
6The rotation of polarization of a terahertz wave through subwavelength metallic structures显示文摘Structures consisting of a planar array of subwavelength metallic bars fabricated on a dielectric substrate are theoretically investigated in order to rotate the polarization of a normally incident terahertz wave in the resonance frequency band.We attribute this phenomenon to one component of the terahertz electric field parallel to inclined metallic bars which is reflected strongly due to the terahertz re-radiation from accelerated electrons in the metallic bars,while the other component perpendicular to the bars transmits almost entirely through the structures.By theoretical analysis,we obtain the transmitted-terahertz components polarized in the x-and y-directions,respectively.Further studies indicate polarization of a terahertz wave can be rotated within two specific frequency bands when the terahertz impinges on the double-bar sample.LIU JianFeng ZHOU QingLi SHI YuLei ZHANG CunLin 2013Science China Chemistry2013,56,3:3
7Carrier dynamics and terahertz photoconductivity of doped silicon measured by femtosecond pump-terahertz probe spectroscopy显示文摘The carrier dynamics and terahertz photoconductivity in the n-type silicon (n-Si) as well as in the p-type Silicon (p-Si) have been investigated by using femtosecond pump-terahertz probe technique. The measurements show that the relative change of terahertz transmission of p-Si at low pump power is slightly smaller than that of n-Si,due to the lower carrier density induced by the recombination of original holes in the p-type material and the photogenerated electrons. At high pump power,the bigger change of terahertz transmission of p-Si originates from the greater mobility of the carriers compared to n-Si. The transient photoconductivities are calculated and fit well with the Drude-Smith model,showing that the mobility of the photogenerated carriers decreases with the increasing pump power. The obtained results indicate that femtosecond pump-terahertz probe technique is a promising method to investigate the carrier dynamics of semiconductors.ZHOU QingLi SHI YuLei LI Tong JIN Bin ZHAO DongMei ZHANG CunLin 2009Science China(Physics,Mechanics & Astronomy)2009,52,12:2
8Optical property and spectroscopy studies on the explosive 2,4,6-trinitro- 1,3,5-trihydroxybenzene in the terahertz range 显示文摘Zhou Qingli Zhang Cunlin Mu Kaijun 2008Applied Physics Letters2008,92,10:1
9Catalytic steam reforming of fast pyrolysis bio-oil in fixed bed and fluidized bed reactors 显示文摘Lan Ping Xu Qingli Zhou Ming 2010Chemical Engineering and Technology2010,33,12:1
10The Establishment of a New Air Health Index Integrating the Mortality Risks Due to Ambient Air Pollution and Non-Optimum Temperature显示文摘A composite Air Health Index(AHI)is helpful for separately emphasizing the health risks of multiple stimuli and communicating the overall risks of an adverse atmospheric environment to the public.We aimed to establish a new AHI by integrating daily mortality risks due to air pollution with those due to non-optimum temperature in China.Based on the exposure-response(E-R)coefficients obtained from time-series models,the new AHI was constructed as the sum of excess mortality risk associated with air pollutants and non-optimum temperature in 272 Chinese cities from 2013 to 2015.We examined the association between the“total AHI”(based on total mortality)and total mortality,and further compared the ability of the“total AHI”to predict specific cardiopulmonary mortality with that of“specific AHIs”(based on specific mortalities).On average,air pollution and non-optimum temperature were associated with 28.23%of daily excess mortality,of which 23.47%was associated with non-optimum temperature while the remainder was associated with fine particulate matter(PM2.5)(1.12%),NO2(2.29%,),and O3(2.29%).The new AHI uses a 10-point scale and shows an average across all 272 cities of 6 points.The E-R curve for AHI and mortality is approximately linear,without any thresholds.Each one unit increase in“total AHI”is associated with a 0.84%increase in all-cause mortality and 1.01%,0.98%,1.02%,1.66%,and 1.71%increases in cardiovascular disease,coronary heart disease,stroke,respiratory diseases,and chronic obstructive pulmonary disease mortality,respectively.Cause-specific mortality risk estimates using the“total AHI”are similar to those predicted by“specific AHIs.”In conclusion,the“total AHI”proposed herein could be a promising tool for communicating health risks related to exposure to the ambient environment to the public.Qingli Zhang Renjie Chen Guanjin Yin Xihao Du Xia Meng Yang Qiu Haidong Kan Maigeng Zhou 2022Engineering2022,8,7:1
11PCA-U-Net based breast cancer nest segmentation from microarray(jj)hyperspectral images显示文摘The incidence of breast cancer is tending younger globally,and tumor development,clinical treatment,and prognosis are largely influenced by histopathological diagnosis.For diagnosed patients,the distinction between the cancer nests and normal tissue is the basis of breast cancer treatment.Microscopic hyperspectral imaging technology has shown its potential in auxiliary pathological examinations due to the superior imaging modality and data characteristics.This paper presents a method for cancer nest segmentation from hyperspectral images of breast cancer tissue microarray samples.The scheme combines the strengths of the U-Net neural network and unsupervised principal component analysis,which reduces the amount of calculation and improves the recognition accuracy.The experimental accuracy of cancer nest segmentation reaches 87.14%.Furthermore,a set of quantitative pathological characteristic parameters reflects the degree of breast cancer lesions from multiple angles,providing a relatively comprehensive reference for the pathologist’s diagnosis.In-depth exploration of the combined development of deep learning and microscopic hyperspectral imaging technology is worthy to promote efficient diagnosis of breast tumors and concern for human health.Jiansheng Wang Yan Wang Xiang Tao Qingli Li Li Sun Jiangang Chen Mei Zhou Menghan Hu Xiufeng Zhou 2021Fundamental Research2021,1,5:1
12TiO 2 Wedgy Nanotubes Array Flims for Photovoltaic Enhancement显示文摘Hao Pan Jieshu Qian Ang Yu Meigui Xu Luo Tu Qingli Chai Xingfu Zhou 2011Applied Surface Science2011,,11:1
13Optical properties of Nd^(3+) ions doped GdTaO_(4) for pressure and temperature sensing显示文摘Pressure-and temperature-dependent luminescence properties of ^(3)F_(3/2)→^(4)I9/2 transition of Nd^(3+):GdTaO_(4) were studied for potential applications in optical sensing.Two isolated emission lines corresponding to^(3)F_(3/2)(R2,1)→^(4)I_(9/2)(Z5)transitions,located at 920 and 927 nm under ambient condition,are very sensitive to pressure with coefficients of-15.6 and-14.5 cm^(-1)/GPa determined in a pressure range up to about 9 GPa.The luminescence intensity ratio between the two emission lines exhibits a large dependence with temperature in a range from 80 to 620 K,the corresponding temperature sensitivity at room temperature is similar to that of Nd^(3+):YAG.These advantages,together with the other observed features of high stable position relationship under pressure and low thermal shifts for the two emission lines indicate that Nd^(3+):GdTaO_(4) is a promising candidate to be used as pressure and temperature sensors in the near-infrared spectral range.Pengyu Zhou Qingli Zhang Fang Peng Baoquan Sun Xiuming Dou Bao Liu Dandan Han Yongzhou Xue Kun Ding 2022Journal of Rare Earths2022,40,6:1
14Low dose of resveratrol enhanced immune responseof mice显示文摘FENG YONGHONG’ZHOU WENLIANG’WU QINGLI etal 2002Acta Pharmacolsin2002,10,:1
15Optical property and spectroscopy studies on the explosive 2,4,6-trinitro1,3,5-rihydroxybenzene in the terahertz range显示文摘Zhou Qingli Zhang Cunlin Mu Kaijun 0,,:1
16Study of dipole arrays at terahertz frequencies显示文摘Jianfeng Liu Qingli Zhou Yulei Shi Cunlin Zhang 2012Optics Communications2012,,:1
17Spatial-spectral identication of abnormal leukocytes based on microscopic hyperspectral imaging technology显示文摘Screening and diagnosing of abnormal Leukocytes are crucial for the diagnosis of immune diseases and Acute Lymphoblastic Leukemia(ALL).As the deterioration of abnormal leukocytes is mainly due to the changes in the chromatin distribution,which signicantly affects the absorption and reflection of light,the spectral feature is proved to be important for leukocytes classication and identication.This paper proposes an accurate identication method for healthy and abnormal leukocytes based on microscopic hyperspectral imaging(HSI)technology which combines the spectral information.The segmentation of nucleus and cytoplasm is obtained by the morphological watershed algorithm.Then,the spectral features are extracted and combined with the spatial features.Based on this,the support vector machine(SVM)is applied for classication ofve types of leukocytes and abnormal leukocytes.Compared with different classication methods,the proposed method utilizes spectral features which highlight the differences between healthy leukocytes and abnormal leukocytes,improving the accuracy in the classication and identication of leukocytes.This paper only selects one subtype of ALL for test,and the proposed method can be applied for detection of other leukemia in the future.Xueqi Hu Jiahua Ou Mei Zhou Menghan Hu Li Sun Song Qiu Qingli Li Junhao Chu 2020Journal of Innovative Optical Health Sciences2020,,2:0
18Results and Analysis on Proficiency Testing and Measurement Audit for Molds and Yeast in Cosmetics显示文摘In order to improve and evaluate the proficiency testing of cosmetic microorganism detection laboratory,strengthen the control of cosmetic microbial detection quality.In 2019 and 2020,the laboratory of the author’s unit participated in the proficiency testing(NIFDC-PT-242)and measurement audit(NIFDC-MA-2020-148)for molds and yeasts in cosmetics organized by the National Institutes for Food and Drug Control,respectively.According to the operation instruction for counting molds and yeasts in cosmetics and the Safety and Technical Standards for Cosmetics,the results of the sample for proficiency testing numbered NIFDC-PT-242 were unsatisfactory,and the results of the sample for measurement audit numbered NIFDC-MA-2020-148 were satisfactory.In view of the unsatisfactory results,the laboratory analyzed and summarized from the aspects of“human,machine,material,method and environment”,providing reference for the laboratories participating in proficiency testing and measurement audit..Ma Qunming Zhou Lei Chen Rui Chen Jingjing Hua Xin Zhu Qingli Yang Jia 2022China Detergent & Cosmetics2022,7,2:0
19Phlorizin alleviates deltamethrin-induced oxidative stress in brine shrimp Artemia显示文摘Deltamethrin(DEL),a commonly used pyrethroid pesticide,results in higher reactive oxygen species(ROS)levels in aquatic animals,which consequently unbalance the redox state.Phlorizin(PHL)is a flavonoid and a natural product promising to prevent or reduce pesticide-induced oxidative stress.Artemia is a micro-crustacean widely used in marine hatcheries and an experimental aquatic organism for environmental toxicology research.This research aimed to evaluate the toxicity of DEL on Artemia and the antioxidative effect of PHL against the toxicity.Results show that 0.08-mg/mL PHL exerted its antioxidative effects on hatching percentage of the cysts in 24-h incubation and on body length and survival rate of Artemia in 12-d culture.After 12-d culture,12-,24-,and 36-h DEL exposure showed significant drops in SOD,CAT,and GSH-Px enzyme activities,and significant increases in ROS and malondialdehyde(MDA)levels in Artemia(P<0.05).On the contrary,0.08-mg/mL PHL application improved the enzyme activities and decreased the ROS and MDA levels(P<0.05).Moreover,0.08-mg/mL PHL significantly increased mRNA expression levels of Cu/Zn SOD,CAT,GST,HO-1,NQO1,and Nrf2,and decreased mRNA expression level of Keap1 in the DEL-exposed Artemia(P<0.05).Therefore,DEL is toxic to Artemia,while PHL alleviates DEL-induced oxidative damage by possibly regulating the Nrf2signaling pathway.This study provided a theoretical basis for PHL to reduce pesticide-induced toxicity in aquatic animals.Dandan MA Qingli ZHOU Liying SUI Qingbin GUO Huanhuan LIU Honghe LIANG Zhenjing LI Zhongna SANG 2024Journal of Oceanology and Limnology2024,42,1:0
20Tolerance and acceptance of hepatic venous pressure gradient measurement in cirrhosis(CHESS1904):An international multicenter study显示文摘Aim:To determine the tolerance and acceptance of hepatic venous pressure gradient(HVPG)measurements in patients with liver cirrhosis.Methods:This prospective international multicenter study included 271 patients with cirrhosis who were scheduled to undergo HVPG measurement between October 2019 and June 2020.Data related to the tolerance and acceptance of HVPG measurements were collected using descriptive questionnaires.Results:HVPG measurements were technically successful in all 271 patients,with 141(52.0%)undergoing HVPG measurement alone.The complication rate was 0.4%.Postoperative pain was significantly lower than preoperative expected pain(p<0.001)and intraoperative pain(p<0.001),and intraoperative pain was also significantly lower than preoperative expected pain(p=0.036).No,mild,moderate,severe,and intolerable discomfort scores were reported by 36.9%,44.6%,11.1%,6.3%,and 0.4%of these patients,respectively,during HVPG measurement and by 54.6%32.5%,11.4%,1.5%,and 0%,respectively,after HVPG measurement.Of these patients,39.5%had little understanding and 10%had no understanding of the value of HVPG measurement,with 35.1%and 4.1%regarding HVPG measurements as being of little or no help,respectively.Most patients reported that they would definitely(15.5%),probably(46.9%),or possibly(29.9%)choose to undergo additional HVPG measurements again,and 62.7%regarded the cost of the procedure as acceptable.Conclusion:HVPG measurement was safe and well‐tolerated in patients with cirrhosis,but patient education and communication are warranted to improve the acceptance of this procedure.Jun‐Hui Sun He Zhao Haijun Zhang Lei Li NecatiÖrmeci Zi‐Niu Yu Xun Li Shuangxi Li Xujun Yang Huaping Wei Xiaoliang Zhu Zhengcong Zhang Yajin Wang Zhongwei Zhao Jianting Mao Qiaohong Wu Xiaole Sun Huiling Xiang Kefeng Jia Chao Yang Wei Wu Xiuqing Lin Haixin Yao Changzeng Zuo Jitao Wang Bo Zhang Chunqing Zhang Xiaoling Wu Guangchuan Wang Shengjuan Yao Ruihang Wang Li Zhou Hui Huan Qingli Tu Xue Pu Feng Zhang Qin Yin Linpeng Zhang Ying Guo Jian Wang Kohei Kotani Sawako Uchida‐Kobayashi Norifumi Kawada He Zhu Li Li Wei Wang Guo Zhang Lei Yu Xudong Cui Qingliang Zhu Hailong Zhang Xiaoli Hu Rafael OXimenes Adriano Gonçalves de Araújo Giulliano Gardenghi Yubao Zheng Zebin Wu Mingsheng Huang Xiaoyong Chen Jun Wu Feng Xie Yang Bo Shengjuan Hu Linke Ma Xiao Li Xiaolong Qi 2022Portal Hypertension & Cirrhosis2022,1,1:0
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