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148篇 您的检索式:作者名="Li Yongmei"
    题名 作者 年代 出处 被引量
1Cyanobacteria-/cyanotoxin-contaminations and eutrophication status before Wuxi Drinking Water Crisis in Lake Taihu, China显示文摘After the appalling 'Wuxi Drinking Water Crisis', increasing investigations concerning the contaminations of cyanobacterial blooms and their toxins in Lake Taihu have been performed and reported in the last two years. However, information regarding these issues before the crisis in 2007 remained insufficient. To provide some background data for further comparisons, the present study reported our investigations conducted in 2004, associated with the cyanotoxin contaminations as well as the eutrophication status in Lake Taihu. Results from the one-year-study near a drinking water resource for Wuxi City indicated that, unlike the status in recent two years, cyanobacteria and chlorophyta are the co-dominance species throughout the year. The highest toxin concentration (34.2 ng/mL) in water columns occurred in August. In bloom biomass, the peak value of intracellular toxin (0.59 μg/mg DW) was determined in October, which was lag behind that in water column. In addition, MC-RR was the major toxin variant throughout the year. During the study period, nutrients levels of total nitrogen and phosphorus were also recorded monthly. Results from the present study will lead to a better understanding of the eutrophication status and the potential risks before 'Wuxi Drinking Water Crisis'.Yongmei Liu Wei Chen Dunhai Li Zebo Huang Yinwu Shen Yongding Liu 2011Journal of Environmental Sciences2011,23,4:19
2Cotton GhPOX1 encoding plant class Ⅲ peroxidase may be responsible for the high level of reactive oxygen species production that is related to cotton fiber elongation显示文摘The accumulation of reactive oxygen species(ROS) is involved in plant cell development.In plant,class Ⅲ peroxidases are heme-containing enzymes encoded by a large multi-gene family participated in the release or consumption of ROS.The specific function of each member of the family is still elusive.Here,we showed that ROS was significantly generated during cotton fiber initiation and elongation,whereas,application of NADPH oxidase inhibitor diphenyleneiodonium(DPI) and peroxidase inhibitor salicylhydroxamic acid(SHAM) to the wild-type cotton ovule culture significantly suppressed fiber growth,respectively.Their inhibitory effects were caused by the reduction of superoxide radical(O2-).Ten GhPOX genes(cDNAs) encoding cotton class Ⅲ peroxidases were isolated,among them eight GhPOX genes were reported for the first time.Microarray analyses indicated that GhPOX1 was the mostly predomi-nantly expressed in fast-elongating cotton fiber cells.Real-time quantitative PCR analysis revealed the transcript level of GhPOX1 was over 400-fold higher in growing fiber cells than in ovules,flowers,roots,stems and leaves.To reveal the role of GhPOX1 in plant devel-opment,its Arabidopsis orthologue atpox13 mutant was demonstrated to be defective in branch root development.Taken together,the data suggest that GhPOX1 plays an important role during fiber cell elongation possibly by mediating production of reactive oxygen spe-cies.Wenqian Mei Yongmei Qin Wenqiang Song Jun Li Yuxian Zhu 2009Journal of Genetics and Genomics2009,36,3:19
3The effects of Xingnao Jieyu capsules on post-stroke depression are similar to those of fluoxetine显示文摘The Xingnao Jieyu capsule has been shown to effectively relieve neurologic impairments and lessen depression. It remains poorly understood whether this capsule can be used to treat post-stroke depression. Thus, in the present study, we established a rat model of post-stroke depression using left middle cerebral artery occlusions in combination of chronic unpredictable stress and solitary housing during development. Experimental rats received intragastric perfusion with 0.82, 0.41, and 0.20 g/kg Xingnao Jieyu capsules separately dissolved in 2 mL distilled water. Fluoxetine served as a positive control. The treatment was conducted over 28 days. Sugar water consumption test, open-field test, real-time fluorescent quantitative PCR and immunohistochemical staining results demonstrated that intragastric perfusion with various doses of Xingnao Jieyu capsules increased sugar water consumption, voluntary behaviors and synaptotagmin mRNA and protein expression in rats with post-stroke depression. These therapeutic effects were similar to those of fluoxetine. These results indicate that Xingnao Jieyu capsules upregulate synaptotagmin expression in hippocampi of rats with post-stroke depression, and exert antidepressant effects.Yongmei Yan Wentao Fan Li Liu Ru Yang Wenjia Yang 2013Neural Regeneration Research2013,8,19:13
4Pediatric reference intervals in China(PRINCE):design and rationale for a large,multicenter collaborative cross-sectional study显示文摘There is a lack of accurate pediatric reference intervals(RIs) in China, with most commonly used RIs established without consideration of the effect of age and gender. The Pediatric Reference Intervals in China(PRINCE) project aims to establish and verify pediatric RIs for 31 common laboratory measurands.The project will be a large, multicenter cross-sectional study:14,490 healthy children and adolescents aged up to 19 years will be surveyed by 10 children's hospitals and one pediatric department of a university hospital. To evaluate the feasibility and efficiency of the study methods, 602 children were surveyed in the pilot phase of the PRINCE study in April 2017: it found that some measurands were distinctly age dependent and that there were differences between values for males and females. The results of the pilot study affirmed the necessity of the PRINCE project for Chinese pediatrics. The pilot also indicated potential difficulties in the full survey, e.g., difficulties in recruiting children aged under 3 years and insufficient collection of blood samples from infants. The operation of the PRINCE project has been modified based on the findings in the pilot study toward improving the validity of the PRINCE project and promoting its openness and transparency.Xin Ni Wenqi Song Xiaoxia Peng Ying Shen Yaguang Peng Qiliang Li Yan Wang Lixin Hu Yanying Cai Hong Shang Min Zhao Hong Jiang Yaoguo Huang Runqing Mu Wenxiang Chen Mingting Peng Chuanbao Zhang Jie Zeng Chenbin Li Hongling Yang Yongmei Jiang Jin Xu Guixia Li Hongbing Chen Yun Xiang Sancheng Cao Zhenxin Guo Dapeng Chen 2018Science Bulletin2018,63,24:12
5Distribution and seasonal variation of estrogenic endocrine disrupting compounds,N-nitrosodimethylamine, and N-nitrosodimethylamine formation potential in the Huangpu River, China显示文摘Detection of estrogenic endocrine disrupting compounds(EDCs) and N-nitrosodimethylamine(NDMA) in drinking water has led to rising concerns. There are, however, a paucity of studies on the distribution and seasonal variation of NDMA and NDMA formation potential(NDMA-FP) in natural waters, especially in China. For EDCs, limited studies have investigated the distribution and seasonal variation of estrone(E1), 17β-estradiol(E2), estriol(E3), 17α-ethinylestradiol(EE2), technical-nonylphenols(t-NP), and bisphenol A(BPA) in Shanghai. In this study, water samples were collected from 11 sampling sites along the Huangpu River in 2012. The distribution and seasonal variation of EDCs, NDMA, and NDMA-FP were investigated. The results showed that all of the 11 sampling sites were contaminated by the target compounds. Compared with E2 and EE2, higher E1 and E3 concentrations were usually detected in the Huangpu River. The values of 17β-estradiol equivalents(EEQ) suggest a high possibility of endocrine effects on exposed organisms in the Huangpu River. NDMA-FP and t-NP were the dominant contaminants among the eight target compounds. The detection rates of the target compounds and their concentrations were both higher in dry seasons than in wet seasons. Higher concentrations of target compounds were observed in urban sampling sites near drainage outlets, and also in suburban sampling sites where intensive livestock farming and farmlands were located.Ai Zhang Yongmei Li Ling Chen 2014Journal of Environmental Sciences2014,26,5:12
6Antidepressant effect of Xingnao Jieyu decoction mediated by alleviating neuroinflammation in a rat model of post-stroke depression显示文摘OBJECTIVE: To identify the antidepressant effect of Xingnao Jieyu (XNJY) decoction on a post-stroke depression (PSD) rat model and the underlying molecular mechanism. METHODS: We established a rat PSD model by middle cerebral artery occlusion (MCAO) combined with chronic unpredictable mild stress (CUMS). Healthy SD rats were randomly divided into six groups: sham, PSD, fluoxetine (Flu), and XNJY groups at low, middle, and high doses. The sham group underwent sham operation, while the other groups underwent MCAO+CUMS. The Flu and XNJY decoction groups were intragastrically administered with Flu or different doses of XNJY for 21 consecutive days. Histopathological changes in the cortex and hippocampus were observed by staining with hematoxylin and eosin and Terminal-deoxynucleoitidyl Transferase Mediated Nick End Labeling. Iba1 positive cells were evaluated by immunofluorescence assay. The expressions of tumor necrosis factor-α(TNF-α), interleukin-6 (IL-6), interleukin-1β(IL-1β), 5-hydroxytryptamine (5-HT), and norepinephrine (NE) in the cortex and hippocampus were measured by enzyme linked immunosorbent assay. RESULTS: The PSD group rats had a significant decrease in body weight, consumption of sucrose water, and locomotor activity but an increase in immobility time during a forced swimming test (P < 0.01) compared with sham group. Flu and different doses of XNJY significantly recovered these indices (P < 0.01). XNJY also inhibited neuronal damage and apoptosis in the cortex induced by PSD (P < 0.01). Furthermore, XNJY reduced the number of Iba1 positive cells and the expressions of TNF-α, IL-6, and IL-1β, in addition to recovered the levels of 5-HT and NE in the cortex and hippocampus (P < 0.01). CONCLUSION: The alleviation of neuroinflammation might be an important mechanism of the XNJY decoction against PSD. Thus, XNJY might be a promising candidate for the treatment of PSD.Yan Yongmei Li Tao Wang Dou Zhao Bingbing Zhou Qi 2019Journal of Traditional Chinese Medicine2019,39,5:11
7Operating condition influences on PCDD/Fs emissions from sinter pot tests with hot flue gas recycling显示文摘This study was designed to clarify the influence of operating conditions on the formation and emissions of polychlorinated-p-dibenzodioxins and dibenzofurans (PCDD/Fs) from a sintering process with hot flue gas recycling. A pilot scale sinter pot with simulated flue gas recycling was developed, and four key operational parameters, including temperature, oxygen content of the simulated waste flue gas, the coke rate of the sintering mixture, and the quicklime quality, were selected for exploring PCDD/Fs formation. The results showed that the temperature of the recycled flue gas had a major affect on PCDD/Fs formation, and a high temperature could significantly increase their formation during sintering. A clear linear correlation between the temperature of recycling flue gas and PCDD/Fs emission (r = 0.93) was found. PCDD/Fs could be reduced to a certain extent by decreasing the level of oxygen in the recycled flue gas, while sintering quality was unchanged. The coke rate had no significant influence on the formation of PCDD/Fs, but the quality of quicklime used in the sintering mixture could affect not only the amount of PCDD/Fs emissions but also the sintering productivity. Compared with a benchmark sinter pot test, PCDD/Fs emissions markedly decreased with improvements to quicklime quality. However, the reduction in PCDD/Fs emissions realized by using high-quality quicklime was limited by the temperature of the inlet gas. The highest reduction achieved was 51% compared with conventional quicklime when the temperature of the inlet gas was 150°C.Yongmei Yu Minghui Zheng Xianwei Li Xiaolei He 2012Journal of Environmental Sciences2012,24,5:11
8Occurrence and removal of N-nitrosodimethylamine and its precursors in wastewater treatment plants in and around Shanghai显示文摘六废水处理植物(WWTP ) 被调查评估出现和移动 N-nitrosodimethylamine (NDMA ) , NDMA 形成潜力(FP ) 和四位特定的 NDMA 先锋, dimethylamine (直接存储器存取) , trimethylamine (TMA ) , dimethylformamide (DMFA ) 和 dimethylaminobenzene (DMAB ) 。与直接存储器存取功能的组一起的直接存储器存取和第三级的胺通常在市政的废水存在。化学上提高的主要过程(CEPP ) 没在 NDMA 或 NDMA FP 的移动上有效果。在有第二等的处理过程的 WWTP,可观的可变性在 NDMA (19%85%) 和 NDMA FP (16%76%) 的移动被观察,而且,在 NDMA 和 NDMA FP 的移动之间没有明确的关系。直接存储器存取很好在所有六调查 WWTP 被移开;它的移动效率比 97% 大。为第三级的胺的移动,生物学的处理与氮的硝化作用和 denitrification 处理移动效率最好比常规激活的污泥处理。为 TMA, DMFA 和 DMAB 的最好的移动效率分别地是 95% , 68% 和 72% 。CEPP 能移开 73% TMA, 23% DMFA 和 36% DMAB。在紫外消毒以后,仅仅, 17% NDMA 由于低剂量被移开紫外在 WWTP 被使用。尽管氯化能减少 NDMA 先锋, NDMA 集中实际上在氯化以后被增加。Lin WANG Yongmei LI Xiaoling SHANG Jing SHEN 2014Frontiers of Environmental Science & Engineering2014,8,4:7
9Effects of grassland management on the community structure, aboveground biomass and stability of a temperate steppe in Inner Mongolia, China显示文摘Plant community structure responds strongly to anthropogenic disturbances, which greatly influence community stability. The changes in community structure, aboveground biomass(AGB), biodiversity and community stability associated with different management practices were studied with a three-year field investigation in a temperate steppe of Inner Mongolia, China. The species richness, Shannon-Wiener index, evenness, plant functional type abundance, AGB, temporal community stability, summed covariance, scaling coefficient and dominant species stability were compared among areas subjected to long-term reservation(R), long-term grazing(G), mowing since enclosure in 2008(M) and grazing enclosure since 2008(E). Site R had higher perennial grass abundance and lower species richness than sites G, M and E, although the AGB was not significantly different among the four sites. The species structure varied from a single dominant species at site R to multiple dominant species at sites G, M and E. The long-term reservation grassland had lower biodiversity but higher stability, whereas the enclosed grassland with/without mowing had higher biodiversity but lower stability. Different stability mechanisms, such as the compensatory dynamics, mean-variance scaling and dominant species stability were examined. Results showed that community stability was most closely related to the relative stability of the dominant species, which supports the biomass ratio hypothesis proposed by Grime.ZHANG Jinghui HUANG Yongmei CHEN Huiying GONG Jirui QI Yu YANG Fei LI Engui 2016Journal of Arid Land2016,8,3:6
10Effects of vegetation types on soil water dynamics during vegetation restoration in the Mu Us Sandy Land, northwestern China显示文摘The arid and semi-arid northwestern China has been undergoing ecological degradation and the efforts to reverse the ecological degradation have been undertaken for many years. Some shifting dunes have been fixed and the vegetation has been partially recovered in certain areas and the Mu Us Sandy Land in the Ordos Plateau is an example of the success. The present study attempts to reveal the relationships between the vegetation restoration and ecohydrology in the Mu Us Sandy Land. We continuously measured soil water content at 10-min intervals under three vegetation types(i.e., shifting dune, shrub-dominated community, and herb-dominated community) in the Mu Us Sandy Land from April 2012 to October 2013. The results show the infiltration coefficient increased with increased rainfall amount and eventually reached a stable value. Infiltration coefficients were 0.91, 0.64, and 0.74 in the shifting dune, in the shrub-dominated community, and in the herb-dominated community, respectively. Cumulative infiltration and soil texture are two vital factors affecting the depths of rainfall penetration. Only rainfall events larger than 35.0 mm could recharge soil water at the 60–80 cm layer in the herb-dominated community. Our results imply that the expected forward succession of restored vegetation may be destined to deterioration after reaching the climax simply because of following two facts:(1) soil water is mainly retained at shallower layer and(2) plant fine roots mainly distribute in deeper layer in the herb-dominated community.Yu Xiaona Huang Yongmei Li Engui Li Xiaoyan Guo Weihua 2017Journal of Arid Land2017,9,2:6
11The Way to Apply Machine Learning to IoT Driven Wireless Network from Channel Perspective显示文摘Internet of Things(IoT) is one of the targeted application scenarios of fifth generation(5 G) wireless communication.IoT brings a large amount of data transported on the network.Considering those data,machine learning(ML) algorithms can be naturally utilized to make network efficiently and reliably.However,how to fully apply ML to IoT driven wireless network is still open.The fundamental reason is that wireless communication pursuits the high capacity and quality facing the challenges from the varying and fading wireless channel.So in this paper,we explore feasible combination for ML and IoT driven wireless network from wireless channel perspective.Firstly,a three-level structure of wireless channel fading features is defined in order to classify the versatile propagation environments.This three-layer structure includes scenario,meter and wavelength levels.Based on this structure,there are different tasks like service prediction and pushing,self-organization networking,self adapting largescale fading modeling and so on,which can be abstracted into problems like regression,classification,clustering,etc.Then,we introduce corresponding ML methods to different levelsfrom channel perspective,which makes their interdisciplinary research promisingly.Wei Li Jianhua Zhang Xiaochuan Ma Yuxiang Zhang Hua Huang Yongmei Cheng 2019China Communications2019,16,1:5
12Accurate Analysis of Connectivity and Resilience for a Class of Wireless Sensor Networks显示文摘Increasing attention is being devoted to network security with the extensive application of wireless sensor networks in various fields. Connectivity and resilience are the crucial metrics of network security.We establish precise formulas for obtaining the resilience of a Key predistribution scheme(KPS) obtained from an Orthogonal array(OA). We study the connectivity and resilience of the Broadcast-enhanced key predistribution scheme(BEKPS) based on OAs and improve the existing methods. We also present precise formulas for evaluating the resilience of these schemes based on any number of partitions, completely solving the problem regarding the resilience of this type of BEKPS. We obtain precise formulas for ensuring the connectivity of two partitions under the condition that each pair of trees from different partitions intersects at exactly one node. We present a general approximate formula for evaluating the connectivity of more than two partitions, providing a positive solution to the open problem in Kendall et al.'s paper in ACM Transactions on Sensor Networks(Vol.11,No.1, 2014). Thus, we can conclude that for this type of BEKPS, connectivity increases, whereas resilience remains unchanged as the number of partitions increases. A comparison of the obtained results and the previously reported results reveals the superior performance of the proposed BEKPSs.PANG Shanqi HU Xianchao GAO Qiang LI Yongmei XIA Yifan 2020Chinese Journal of Electronics2020,29,2:5
13Waste activated sludge hydrolysis and acidification: A comparison between sodium hydroxide and steel slag addition显示文摘Alkaline treatment with steel slag and NaOH addition were investigated under different pH conditions for the fermentation of waste activated sludge. Better performance was achieved in steel slag addition scenarios for both sludge hydrolysis and acidification. More solubilization of organic matters and much production of higher VFA(volatile fatty acid)in a shorter time can be achieved at pH 10 when adjusted by steel slag. Higher enzyme activities were also observed in steel slag addition scenarios under the same pH conditions.Phosphorus concentration in the supernatant increased with fermentation time and pH in NaOH addition scenarios, while in contrast most phosphorus was released and captured by steel slag simultaneously in steel slag addition scenarios. These results suggest that steel slag can be used as a substitute for NaOH in sludge alkaline treatment.Ying Zhang Chaojie Zhang Xuan Zhang Leiyu Feng Yongmei Li Qi Zhou 2016Journal of Environmental Sciences2016,28,10:5
14An applied research on remote sensing classification in the Loess Plateau显示文摘Due to complex terrain of the Loess Plateau, the classification accuracy is unsatisfactory when a single supervised classification is used in the remote sensing investigation of the sloping field. Taking the loess hill and gully area of northern Shaanxi Province as a test area, a research was conducted to extract sloping field and other land use categories by applying an integrated classification. Based on an integration of supervised classification and unsupervised classification, sampling method is remarkably improved. The results show that the classification accuracy is satisfactory by the method and is of critical significance in obtaining up-to-date information of the sloping field, which should be helpful in the state key project of converting fiumland to forest and grassland on slope land in this area. This research sought to improve the appfication accuracy of image classification in complex terrain areas.LIU Yongmei TANG Guoan LI Tianwen YANG Qinke 2003Journal of Geographical Sciences2003,13,4:5
15Verification of Mutagen Function of Zeocin in Nannochloropsis oceanica Through Transcriptome Analysis显示文摘Zeocin can cause double strand breaks of DNA and thus is frequently used as a selective antibiotic of eukaryotic Sh ble transformants. In non-transformation system, Zeocin may function as a mutagen if not totally lethal. To verify such function of Zeocin, we mutated Nannochloropsis oceanica by increasing the concentration of Zeocin in medium gradually, and isolated a N. oceanica strain(single cell culture) which survived Zeocin up to 10.0μg mL^(-1). The Zeocin-tolerant strain entered the exponential growth phase later and grew slower than the wild strain. Transcriptome profiling showed that the Zeocin-tolerant N. oceanica strain survived Zeocin mainly by adapting(heritable), rather than acclimating(plastic) to Zeocin. Hence mutating N. oceanica with Zeocin was approved effective. Meanwhile, the physiological characteristics of this Zeocin-tolerant strain were demonstrated. As we proposed, N. oceanica tolerated Zeocin by strengthening its protein degradation and antioxidation. The genes controlling cell division and cellular response to stimuli may also have played important roles in the reduction of growth and the tolerance to Zeocin. Our findings evidenced that Zeocin can serve as an appropriate mutagen of microalgae. Creating variations through mutation with Zeocin may help to study the genetic basis of the traits of this monoploidy and asexual microalga, as well as improve its production.LIN Genmei WANG Yamei GUO Li DING Haiyan HU Yongmei LIANG Sijie ZHANG Zhongyi YANG Guanpin 2017Journal of Ocean University of China2017,16,3:5
16Development of a rapid and sensitivity magnetic chemiluminescence immunoassay for DNA methyltransferase 1 in human serum显示文摘DNA methyltransferase 1(DNMT1)is a useful biomarker for lung cancer in early clinical diagnosis.A rapid magnetic chemiluminescence immunoassay(MCLIA)for DNMT1 in human serum has been developed.Horseradish peroxidase(HRP)-second-Ab was used to labeled polyclonal antibodies of anti-DNMT1.DNMT1 in sample integrates with specific immunomagnetic beads and can constitute a supersandwiched immunoreaction.In magnetic field,nonspecific materials can be separated.After luminescent substrate luminol-H2O2-BIP was added,the relative light unit(RLU)of HRP was detected and was discovered to be directly proportional to the content of DNMT1 in sample.The correlative variables involved in the MCLIA value were optimized and the methodological evaluation was carried out.After optimization,in the range of0.5–128 ng/mL,the linear regression equation was y=0.5014 x+1.769(x was logCDNMT1,y was relative luminescence units(RLU)/RLU0),and the limit of detection was 0.01 ng/mL.The RSD of intra-and interassays were 15.8%–16.9%and 14.3%–18.1%,respectively.The recovery was from 70.0%to 106.2%.Furthermore,paralleled with purchasable enzyme-linked immunosorbent assay(ELISA)kits,MCLEIA had lower detection limit,wider linear range and shorter detection time.Therefore,the MCLEIA established in this study could be used for the sensitive detection of DNMT1 in serum sample.Sitian He Leiliang He Beibei Liu Songcheng Yu Li'e Liu Yongmei Tian Jia Wang Lihua Ding Yilin Wang Lingbo Qu Fei Yu Yongjun Wu 2019Chinese Chemical Letters2019,30,5:4
17Hypoxia induces T-cell apoptosis by inhibiting chemokine C receptor 7 expression:the role of adenosine receptor A2显示文摘Hypoxia is a major characteristic of the tumor microenvironment,and its effects on immune cells are proposed to be important factors for the process of tumor immune escape.It has been reported that hypoxia affects the function of dendritic cells and the antitumor function of T cells.Here we discuss the effects of hypoxia on T-cell survival.Our results showed that hypoxia induced apoptosis of T cells.Adenosine and adenosine receptors(AR)are important to the hypoxia-related signaling pathway.Using AR agonists and antagonists,we demonstrated that hypoxia-induced apoptosis of T cells was mediated by A^(2a)and A^(2b)receptors.Furthermore,we are the first,to our knowledge,to report that hypoxia significantly inhibited the expression of chemokine C receptor 7(CCR7)of T cells via the A^(2)R signal pathway,perhaps representing a mechanism of hypoxia-induced apoptosis of T cells.Collectively,our research demonstrated that hypoxia induces T-cell apoptosis by the A^(2)R signaling pathway partly by suppressing CCR7.Blocking the A^(2)R signaling pathway and/or activation of CCR7 can increase the anti-apoptosis function of T cells and may become a new strategy to improve antitumor potential.Jintang Sun Yan Zhang Meixiang Yang Yun Zhang Qi Xie Zewu Li Zhaogang Dong Yongmei Yang Biping Deng Alei Feng Weixu Hu Haiting Mao Xun Qu 2010Cellular & Molecular Immunology2010,7,1:3
18A novel extractant bis(2-ethylhexyl)((2-ethylhexylamino)methyl) phosphine oxide for cerium(Ⅳ) extraction and separation from sulfate medium显示文摘By introducing the amine group into phosphorus extractant,a novel aminophosphine compound bis(2-ethylhexyl)((2-ethylhexylamino)methyl) phosphine oxide(DEHAPO,abbreviated as A) was synthesized for the extraction of cerium(Ⅳ)(Ce(Ⅳ)) from sulfate medium(H2 SO4).The influence factors including extractant concentration,H2 SO4 concentration and temperature on the Ce(Ⅳ) extraction were investigated and discussed.It is found that the extraction ability of Ce(Ⅳ),thorium(Ⅳ)(Th(Ⅳ)) and rare earths(REs(Ⅲ))(La,Gd,Yb) decreases in sulphate medium in the following order:Ce(Ⅳ)> Th(Ⅳ)> REs(Ⅲ).The extraction process is an exothermic reaction and the thermodynamic parameters were calculated.The extracted complex of Ce(HSO4)2 SO4·A in loaded organic solution was identified by the slope methods and further proved by FT-IR spectral analysis.Stripping studies indicate that Ce(IV) can be effectively stripped from the organic phase.The results of separation factors(β) and saturation loading capacity demonstrate that DEHAPO could be used to selectively extract Ce(Ⅳ) from sulphate medium with high separation efficiency and good extraction ability.Mingxia Huang Yongmei Fu Youcai Lu Wuping Liao Zhongjun Li 2020Journal of Rare Earths2020,38,12:3
19Flotillin1 promotes EMT of human small cell lung cancer via TGF-β signaling pathway显示文摘Objective:Small cell lung carcinoma(SCLC)is considered one of the most aggressive types of lung cancer due to its rapid growth and early metastasis.No tumor markers or therapeutic targets have been demonstrated to be specific or effective in SCLC to date.This study aims to evaluate the potential of Flotillin1(Flot1)as a target of SCLC treatment.Methods:Flot1 expression level in the tissue of SCLC and other tissue of lung disease was detected using immunohistochemical staining.Transwell and Matrigel assays were employed to examine migration and invasion of cancer cells.Flow cytometry and xCELLigence system were used to evaluate cell apoptosis and cell viability,respectively.Expression levels of Flot1,epithelialmesenchymal transition(EMT)marker E-cadherin,vimentin,cyclinD1,TGF-β-Smad2/3,and p-AKT were examined using Western blot.Furthermore,xenograft tumor in nude mice was used to evaluate the growth and metastasis of NCI-H446 cells in vivo.Results:Our results demonstrated that Flot1 is highly expressed in SCLC samples and that its expression correlates strongly with clinical stage,distant metastasis,and poor survival.The knockdown of Flot1 decreased the growth,migration,and invasiveness of SCLC cells and reversed EMT phenotype in vitro and in vivo,while enhanced Flot1 expression exhibited the opposite behavior.Gene expression profile analysis demonstrated that Flot1-regulated genes frequently mapped to the AKT and TGF-β-Smad2/3pathways.Our results further revealed that Flot1 affected the progression of SCLC via regulation of EMT progression.Conclusions:These findings indicated an oncogenic role of Flot1 via promoting EMT in SCLC and suggested its potential as a tumor marker and prognostic indicator.Lianmei Zhao Jie Li Yueping Liu Wei Zhou Yanan Shan Xinyi Fan Xinliang Zhou Baoen Shan Yongmei Song Qimin Zhan 2018Cancer Biology & Medicine2018,15,4:3
20Novel lysosome-targeted anticancer fluorescent agents used in zebrafish and nude mouse tumour imaging显示文摘The design of three novel fatty nitrogen mustard-based anticancer agents with fluorophores incorporated into the alkene structure(CXL 118,CXL121,and CXL122)is described in this report.The results indicated that these compounds are selectively located in lysosomes and exhibit effective antitumour activity.Notably,these compounds can directly serve as both reporting and imaging agents in vitro and in vivo without the need to add other fluorescent tagging agents.Xiuli Chen Feng Liu Bin Chen Haiying Wu Kun Li Yongmei Xie Weihong Kuang Zhihui Li 2022Frontiers of Chemical Science and Engineering2022,16,1:2
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