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1536篇 您的检索式:作者名="DI Liu"
    题名 作者 年代 出处 被引量
1The land use and land cover change database and its relative studies in China显示文摘In the mid-1990s, we established the national operative dynamic information serving systems on natural resources and environment. During building the land-use/land-cover change (LUCC)database for the mid-1990s, 520 scenes of remotely sensed images of Landsat Thematic Mapper (TM) were interpreted into land-use/land-cover categories at scale of 1:100,000 under overall digital software environment after being geo-referenced and ortho-rectified. The vector map of land-use/land-cover in China at the scale of 1:100,000 was recently converted into a 1-km raster database that captures all ofthe high-resolution land-use information by calculating area percentage for each kind of land use category within every cell. Being designed as an operative dynamic information serving system,monitoring the change in land-use/land-cover at national level was executed. We have completed the updating of LUCC database by comparing the TM data in the mid-1990s with new data sources received during 1999-2000 and 1989-1990. The LUCC database has supported greatly the national LUCC research program in China and some relative studies are incompletely reviewed in this paper.LIU Jiyuan, LIU Mingliang, DENG Xiangzheng, ZhuangDafang,ZHANG Zengxiang, LUO Di(1. Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China 2. Inst. of Remote Sensing Applications, CAS, Beijing 100101, China) 2002Journal of Geographical Sciences2002,12,3:96
2Current pattern of Chinese dialysis units: a cohort study in a representative sample of units显示文摘ZHOU Qiu-gen JIANG Jian-ping WU Sheng-jie TIAN Jian-wei CHEN Jiang-hua YU Xue-qing CHEN Ping-yan MEI Chang-lin XIONG Fei SHI Wei ZHOU Wei LIU Xu-sheng SUN Shi-ren XIE Di LIU Jun XU Xin HOU Fan-fan 2012Chinese Medical Journal2012,,19:69
3An Interdisciplinary Nutrition Support Team Improves Clinical and Hospitalized Outcomes of Esophageal Cancer Patients with Concurrent Chemoradiotherapy显示文摘Ming-Hua Cong Shu-Luan Li Guo-Wei Cheng Jin-Ying Liu Chen-Xin Song Ying-Bing Deng Wei-Hu Shang Di Yang Xue-Hui Liu Wei-Wei Liu Shi-Yan Lu Lei Yu 2015Chinese Medical Journal2015,,22:41
4Effect of mild moxibustion on intestinal microbiota and NLRP6 inflammasome signaling in rats with post-inflammatory irritable bowel syndrome显示文摘BACKGROUND About one-third of refractory irritable bowel syndrome(IBS)cases are caused by gastrointestinal(GI)infection/inflammation,known as post-infectious/postinflammatory IBS(PI-IBS).Although it is known that intestinal microbiota and host NOD-like receptor family pyrin domain containing 6(NLRP6)inflammsome signaling are closely related to PI-IBS and moxibustion has a therapeutic effect on PI-IBS,whether moxibustion regulates the intestinal flora and host NLRP6 events in PI-IBS remains unclear.AIM To examine the regulatory effect of moxibustion on intestinal microbiota and host NLRP6 inflammatory signaling in PI-IBS.METHODS Sprague-Dawley rats were divided into a normal control group,a model control group,a mild moxibustion group,and a sham mild moxibustion group.PI-IBS rats in the mild moxibustion group were treated with moxibusiton at bilateral Tianshu(ST 25)and Zusanli(ST36)for 7 consecutive days for 10 min each time.The sham group rats were given the same treatment as the mild moxibustion group except the moxa stick was not ignited.Abdominal withdrawal reflex(AWR)score was measured to assess the visceral sensitivity,and colon histopathology and ultrastructure,colonic myeloperoxidase(MPO)activity,and serum C-reactive protein(CRP)level were measured to evaluate low-grade colonic inflammation in rats.The relative abundance of selected intestinal bacteria in rat feces was detected by 16S rDNA PCR and the NLRP6 inflammsome signaling in the colon was detected by immunofluorescence,qRTPCR,and Western blot.RESULTS The AWR score was significantly decreased and the low-grade intestinal inflammation reflected by serum CRP and colonic MPO levels was inhibited in the mild moxibustion group compared with the sham group.Mild moxibustion remarkably increased the relative DNA abundances of Lactobacillus,Bifidobacterium,and Faecalibacterium prausnitzii but decreased that of Escherichia coli in the gut of PI-IBS rats.Additionally,mild moxibustion induced mRNA and protein expression of intestine lectin 1 but inhibited the expression of IL-1β,IL-18,and resistance-like moleculeβby promoting the NLRP6 and reducing the mRNA and protein expression of apoptosis-associated speck-like protein containing CARD(ASC)and cysteinyl-aspartate-specific proteinase 1(Caspase-1).The relative DNA abundances of Lactobacillus,Bifidobacteria,Faecalibacterium prausnitzii,and Escherichia coli in each group were correlated with the mRNA and protein expression of NLRP6,ASC,and Caspase-1 in the colon.CONCLUSION These findings indicated that mild moxibustion can relieve low-grade GI inflammation and alleviate visceral hypersensitivity in PI-IBS by regulating intestinal microbes and controlling NLRP6 inflammasome signaling.Chun-Hui Bao Chun-Ye Wang Guo-Na Li Yi-Lu Yan Di Wang Xiao-Ming Jin Lu-Yi Wu Hui-Rong Liu Xiao-Mei Wang Zheng Shi Huan-Gan Wu 2019World Journal of Gastroenterology2019,25,32:45
5Anisotropic coding metamaterials and their powerful manipulation of differently polarized terahertz waves显示文摘Metamaterials based on effective media can be used to produce a number of unusual physical properties(for example,negative refraction and invisibility cloaking)because they can be tailored with effective medium parameters that do not occur in nature.Recently,the use of coding metamaterials has been suggested for the control of electromagnetic waves through the design of coding sequences using digital elements‘0’and‘1,'which possess opposite phase responses.Here we propose the concept of an anisotropic coding metamaterial in which the coding behaviors in different directions are dependent on the polarization status of the electromagnetic waves.We experimentally demonstrate an ultrathin and flexible polarization-controlled anisotropic coding metasurface that functions in the terahertz regime using specially designed coding elements.By encoding the elements with elaborately designed coding sequences(both 1-bit and 2-bit sequences),the x-and y-polarized waves can be anomalously reflected or independently diffused in three dimensions.The simulated far-field scattering patterns and near-field distributions are presented to illustrate the dual-functional performance of the encoded metasurface,and the results are consistent with the measured results.We further demonstrate the ability of the anisotropic coding metasurfaces to generate a beam splitter and realize simultaneous anomalous reflections and polarization conversions,thus providing powerful control of differently polarized electromagnetic waves.The proposed method enables versatile beam behaviors under orthogonal polarizations using a single metasurface and has the potential for use in the development of interesting terahertz devices.Shuo Liu Tie Jun Cui Quan Xu Di Bao Liangliang Du Xiang Wan Wen Xuan Tang Chunmei Ouyang Xiao Yang Zhou Hao Yuan Hui Feng Ma Wei Xiang Jiang Jiaguang Han Weili Zhang Qiang Cheng 2016Light(Science & Applications)2016,5,1:36
6Environmental connections of novel avian-origin H7N9 influenza virus infection and virus adaptation to the human显示文摘A novel H7N9 influenza A virus has been discovered as the causative identity of the emerging acute respiratory infection cases in Shanghai,China.This virus has also been identified in cases of infection in the neighboring area Hangzhou City in Zhejiang Province.In this study,epidemiologic,clinical,and virological data from three patients in Hangzhou who were confirmed to be infected by the novel H7N9 influenza A virus were collected and analyzed.Human respiratory specimens and chicken feces from a contacted free market were tested for influenza virus by real-time reverse transcription PCR(RT-PCR) and sequencing.The clinical features of the three cases were similar featured with high fever and severe respiratory symptoms;however,only one of the patients died.A certain degree of diversity was observed among the three Hangzhou viruses sequenced from human samples compared with other reported H7N9 influenza A viruses.The sequences of the novel avian-origin H7N9 influenza viruses from Hangzhou City contained important amino acid substitutions related to human adaptation.One of the Hangzhou viruses had gained a novel amino acid substitution(Q226I) in the receptor binding region of hemagglutinin.More importantly,the virus sequenced from the chicken feces had a 627E substitution in the PB2 protein instead of the mammalian-adapted 627K substitution that was found in the PB2 proteins from the Hangzhou viruses from the three patients.Therefore,the newly-emerging H7N9 virus might be under adaptation pressure that will help it 'jump' from avian to human hosts.The significance of these substitutions needs further exploration,with both laboratory experiments and extensive field surveillance.LI Jun YU XinFen PU XiaoYing XIE Li SUN YongXiang XIAO HaiXia WANG FenJuan DIN Hua WU Ying LIU Di ZHAO GuoQiu LIU Jun PAN JingCao 2013Science China(Life Sciences)2013,56,6:32
7SIRT6 safeguards human mesenchymal stem cells from oxidative stress by coactivating NRF2显示文摘Huize Pan Di Guan Xiaomeng Liu Jingyi Li Lixia Wang Jun Wu Junzhi Zhou Weizhou Zhang Ruotong Ren Weiqi Zhang Ying Li Jiping Yang Ying Hao Tingting Yuan Guohong Yuan Hu Wang Zhenyu Ju Zhiyong Mao Jian Li Jing Qu FuchouTang Guang-Hui Liu 2016Cell Research2016,26,2:32
8Effect of bax,bcl-2 and bcl-xL on regulating apoptosis in tissues of normal liver and hepatocellular carcinoma显示文摘AIM: To investigate the expression of bax, bcl-2 and bcl-xL mRNA in the tissues of normal liver and hepatocellular carcinoma (HCC), and analyze the relationship between the expression of bax, bcl-2 and bcl-xL mRNA and clinical parameters of HCC patients.METHODS: The expression of bax, bcl-2 and bcl-xL mRNA of normal liver and HCC was measured by Northern blot. Statistical analyses were made by t test and correlation analysis.RESULTS: A very low mRNA level was indicated at bax,bcl-2 and bcl-xL in the HCC tissues in contrast to the tissues of normal liver by Northern blot analysis. The analyses of mRNA level revealed that HCC tissues exhibited a mean 7.6-fold decrease in bax, 4.2-fold in bcl-2 and 3.5-fold in bcl-xL in comparison with normal control tissues, respectively. Positive correlation was found between bax and bcl-xL (r=0.7061,P<0.01). There was no significance between the mRNA expression of these three genes and age, gender, tumor differentiation and tumor stage of HCC patients. CONCLUSION: The results are consistent with the fact that apoptosis rarely occurs in normal livers but increases in HCC, indicating that bcl-2 and bcl-xL may play a very important role in regulating the apoptosis of normal liver and HCC.Xiao-Zhong Guo Xiao-Dong Shao Min-Pei Liu Jian-Hua Xu Li-Nan Ren Jia-Jun Zhao Hong-Yu Li Di Wang,Department of Gastroenterology,General Hospital of Shenyang Military Region,Shenyang 110016,Liaoning Province,China 2002World Journal of Gastroenterology2002,8,6:34
9The effect of oxidative stress in myocardial cell injury in mice exposed to chronic intermittent hypoxia显示文摘背景妨碍的睡觉呼吸暂停症候群(OSAS ) 是为心血管的疾病的一个重要风险因素。长期的断断续续的组织缺氧(CIH ) 被认为是在 OSA 病人的心血管的疾病的最重要的原因之一。这个重复组织缺氧和氧化周期类似于 hypoxia-reperfusion 损害,它开始氧化应力。在这研究,我们观察了 CIH 和 N-acetylcysteine (NAC ) 的效果导致的 cardiocytes 损害。三十只 ICR 老鼠随机被分到 3 个组的方法:控制, CIH 和 NAC (CIH+NAC ) 组。Malondialdehyde (MDA ) 和 cardiocyte homogenates 的 superoxide dismutase (草皮) 被测量。浆液类脂化合物被一个仪器方法测量。浆液心脏的 troponin (cTnl ) 我被连接酶的 immunosorbent 试金(ELISA ) 检测。心肌层病理学的节是草皮活动和在 CIH 的 cardiocyte homogenates 的 MDA 集中组织的 observed.Results (1 ) 比在另外的组显著地高(P < 0.005 ) 。NAC 组的 MDA 集中比控制组的低(P < 0.01 ) 。(2 ) CIH 和 NAC 组的浆液 cTnl 集中比控制组的显著地高(P < 0.01 ) 。(3 ) 在 NAC 组的浆液 triglyceride 层次比在另外的组低(P < 0.01 ) ,当在低密度脂蛋白和高密度没有重要差别时,在三之中的脂蛋白组织。(4 ) 心肌层,模糊的横向的有条纹或刻痕之状态,和织物流出的退化在 CIH 和 NAC 组在织物节被观察。然而,正常织物在 CIH 导致的氧化压力能伤害的控制 group.Conclusion 被发现 cardiocytes 和损害效果罐头被 NAC 部分禁止。LIU Jian-nan ZHANG Jie-xin LU gan QIU Yan YANG Di YIN Guo-yong ZHANG Xi-long 2010Chinese Medical Journal2010,,1:25
10Origin and molecular characterization of the human-infecting H6N1 infl uenza virus in Taiwan显示文摘In June 2013,the fi rst human H6N1 infl uenza virus infec-tion was confirmed in Taiwan.However,the origin and molecular characterization of this virus,A/Taiwan/2/2013(H6N1),have not been well studied thus far.In the present report,we performed phylogenetic and coalescent analy-ses of this virus and compared its molecular profi le/char-acteristics with other closely related strains.Molecular characterization of H6N1 revealed that it is a typical avian infl uenza virus of low pathogenicity,which might not rep-licate and propagate well in the upper airway in mammals.Phylogenetic analysis revealed that the virus clusters with A/chicken/Taiwan/A2837/2013(H6N1)in seven genes,except PB1.For the PB1 gene,A/Taiwan/2/2013 was clus-tered with a different H6N1 lineage from A/chicken/Taiwan/A2837/2013.Although a previous study demonstrated that the PB2,PA,and M genes of A/Taiwan/2/2013 might be derived from the H5N2 viruses,coalescent analyses revealed that these H5N2 viruses were derived from more recent strains than that of the ancestor of A/Taiwan/2/2013.Therefore,we propose that A/Taiwan/2/2013 is a reassor-tant from different H6N1 lineages circulating in chickens in Taiwan.Furthermore,compared to avian isolates,a sin-gle P186L(H3 numbering)substitution in the hemaggluti-nin H6 of the human isolate might increase the mammali-an receptor binding and,hence,this strain’s pathogenicity in humans.Overall,human infection with this virus seems an accidental event and is unlikely to cause an infl uenza pandemic.However,its co-circulation and potential reas-sortment with other infl uenza subtypes are still worthy of attention.Weifeng Shi Yi Shi Ying Wu Di Liu George F.Gao 2013Protein & Cell2013,4,11:26
11Epigenetic silencing of microRNA-149 in cancer-associated fibroblasts mediates prostaglandin E2/interleukin-6 signaling in the tumor microenvironment显示文摘Pu Li Jing-Xuan Shan Xue-Hua Chen Di Zhang Li-Ping Su Xiu-Ying Huang Bei-Qin Yu Qiao-Ming Zhi Cheng-Long Li Ya-Qing Wang Sara Tomei Qu Cai Jun Ji Jian-Fang Li Lotfi Chouchane Ying-Yan Yu Fang-Zhen Sun Zhi-Heng Xu Bing-Ya Liu Zheng-Gang Zhu 2015Cell Research2015,25,5:24
12Individualized prediction of perineural invasion in colorectal cancer: development and validation of a radiomics prediction model显示文摘Objective: To develop and validate a radiomics prediction model for individualized prediction of perineural invasion(PNI) in colorectal cancer(CRC).Methods: After computed tomography(CT) radiomics features extraction, a radiomics signature was constructed in derivation cohort(346 CRC patients). A prediction model was developed to integrate the radiomics signature and clinical candidate predictors [age, sex, tumor location, and carcinoembryonic antigen(CEA) level]. Apparent prediction performance was assessed. After internal validation, independent temporal validation(separate from the cohort used to build the model) was then conducted in 217 CRC patients. The final model was converted to an easy-to-use nomogram.Results: The developed radiomics nomogram that integrated the radiomics signature and CEA level showed good calibration and discrimination performance [Harrell's concordance index(c-index): 0.817; 95% confidence interval(95% CI): 0.811–0.823]. Application of the nomogram in validation cohort gave a comparable calibration and discrimination(c-index: 0.803; 95% CI: 0.794–0.812).Conclusions: Integrating the radiomics signature and CEA level into a radiomics prediction model enables easy and effective risk assessment of PNI in CRC. This stratification of patients according to their PNI status may provide a basis for individualized auxiliary treatment.Yanqi Huang Lan He Di Dong Caiyun Yang Cuishan Liang Xin Chen Zelan Ma Xiaomei Huang Su Yao Changhong Liang Jie Tian Zaiyi Liu 2018Chinese Journal of Cancer Research2018,30,1:23
13Bacterial flora concurrent with Helicobacter pylori in the stomach of patients with upper gastrointestinal diseases显示文摘AIM:To investigate the non-Helicobacter pylori(H.pylori) bacterial flora concurrent with H.pylori infection.METHODS:A total of 103 gastric biopsy specimens from H.pylori positive patients were selected for bacterial culture.All the non-H.pylori bacterial isolates were identified by matrix-assisted laser desorption ionization time-of-flight mass spectrometry(MALDI-TOF MS).RESULTS:A total of 201 non-H.pylori bacterial isolates were cultivated from 67(65.0%) of the 103 gastric samples,including 153 isolates identified successfully at species level and 48 at genus level by MALDI-TOF MS.The dominant species were Streptococcus,Neisseria,Rothia and Staphylococcus,which differed from the predominantly acid resistant species reported previously in healthy volunteers.The prevalence of non-H.pylori bacteria was higher in non-ulcer dyspepsia group than in gastric ulcer group(100%vs 42.9%,P < 0.001).Six bacterial species with urease activity(Staphylococcus epidermidis,Staphylococcus warneri,Staphylococcus capitis,Staphylococcus aureus,Brevibacterium spp.and Klebsiella pneumoniae) were also isolated.CONCLUSION:There is a high prevalence of the non-H.pylori bacteria concurrent with H.pylori infection,and the non-H.pylori bacteria may also play important as-yet-undiscovered roles in the pathogenesis of stomach disorders.Yuan Hu Li-Hua He Di Xiao Guo-Dong Liu Yi-Xin Gu Xiao-Xia Tao Jian-Zhong Zhang 2012World Journal of Gastroenterology2012,18,11:20
14Blocking the recruitment of naive CD4+ T cells reverses immunosuppression in breast cancer显示文摘渗入肿瘤的 Tregs 的起源,肿瘤免疫力的抑制的批评调停人,是不清楚的。这里,,我们证明在人的乳癌的渗入肿瘤的天真的 CD4 + T 房间和 Tregs 有重叠 TCR 全部剧目几乎别与传播 Tregs 重叠,建议 intratumoral Tregs 主要在 situ 而非从招募的 Tregs 从天真的 T 房间发展。而且,许多天真的 CD4 + T 房间和 Tregs 密切被相关,两个显示的穷人为乳癌病人的预后。天真的 CD4 + T 房间与许多生产 CCL18 巨噬细胞成比例遵守肿瘤片。而且,采纳地转移的人的天真的 CD4 + T 房间以一种 CCL18 依赖的方式渗入人的乳癌 orthotopic 异种皮移植。在在人性化的鼠标的人的乳癌异种皮移植,由将 PITPNM3 的表达式击倒堵住天真的 CD4 + T 房间的招募进肿瘤, CCL18 受体,显著地减少 intratumoral Tregs 并且禁止肿瘤前进。这些调查结果建议那个乳房渗入肿瘤的 Tregs 从在 situ 区分进 Tregs 的传播天真的 CD4 + T 房间的趋化性产生。由防碍 CCL18 的 PITPNM3 识别禁止天真的 CD4 + T 房间招募进肿瘤可以是为 anticancer 免疫疗法的吸引人的策略。Shicheng Su Jianyou Liao Jiang Liu Di Huang Chonghua He Fei Chen LinBing Yang Wei Wu Jianing Chen Ling Lin Yunjie Zeng Nengtai Ouyang Xiuying Cui Herui Yao Fengxi Su Jian-dong Huang Judy Lieberman Qiang Liu Erwei Song 2017Cell Research2017,27,4:19
15Sodium Tanshinone Ⅱ A Sulfonate Injection as Adjuvant Treatment for Unstable Angina Pectoris: A Meta-Analysis of 17 Randomized Controlled Trials显示文摘Objective: To systematically evaluate the effectiveness and safety of Sodium Tanshinone ⅡA Sulfonate Injection(STS) as one adjuvant therapy for treating unstable angina pectoris(UAP). Methods: Randomized controlled trials(RCTs) of UAP treated by STS were searched in the China National Knowledge Infrastructure Database(CNKI), VIP Database for Chinese Technical Periodicals(VIP), Wanfang Database, the Chinese Biomedical Literature Database(CBM), Web of Science, the Cochrane Library, Embase, and Pub Med, which from inception to January, 2016. The Cochrane Risk Assessment Tool was used to evaluate the methodological quality of the RCTs. The Review Manager 5.3 software was used to conduct the metaanalysis. Results: The results showed that 17 RCTs involving 1,372 patients were included. The meta-analysis indicated that the combined use of STS and Western medicine(WM) in the treatment of UAP can obviously improve the total effective rate [risk ratio(RR)=1.31, 95% confidence interval(CI)(1.24,1.39), P<0.0001], and the total effective rate of electrocardiogram [RR=1.43, 95% CI(1.30,1.56), P<0.0001], decrease the level of CRP [mean difference(MD)=–3.06, 95%CI(–3.85, –2.27), P<0.00001], fibrinogen [MD=–1.03, 95% CI(–1.16, –0.89), P<0.00001], and whole blood high shear viscosity [MD=–0.70, 95% CI(–0.92, –0.49), P<0.00001]. Additionally, the occurrence of adverse drug reaction of the experimental group was significantly higher than that of the control group [RR=3.57, 95% CI(1.28, 9.94), P<0.05]. Conclusions: Compared with WM, the combined use of STS was more effective.TAN Di WU Jia-rui ZHANG Xiao-meng LIU Shi ZHANG Bing 2018Chinese Journal of Integrative Medicine2018,24,2:19
16Blockade of Tim-3 Pathway Ameliorates Interferon-γ Production from Hepatic CD8^+ T Cells in a Mouse Model of Hepatitis B Virus Infection显示文摘T cell immunoglobulin-and mucin-domain-containing molecule-3(Tim-3) has been reported to participate in the pathogenesis of inflammatory diseases. However,whether Tim-3 is involved in hepatitis B virus(HBV) infection remains unknown. Here,we studied the expression and function of Tim-3 in a hydrodynamics-based mouse model of HBV infection. A significant increase of Tim-3 expression on hepatic T lymphocytes,especially on CD8+ T cells,was demonstrated in HBV model mice from day 7 to day 18. After Tim-3 knockdown by specific shRNAs,significantly increased IFN-γ production from hepatic CD8+ T cells in HBV model mice was observed. Very interestingly,we found Tim-3 expression on CD8+ T cells was higher in HBV model mice with higher serum anti-HBs production. Moreover,Tim-3 knockdown influenced anti-HBs production in vivo. Collectively,our data suggested that Tim-3 might act as a potent regulator of antiviral T-cell responses in HBV infection.Ying Ju Nan Hou Xiaoning Zhang Di Zhao Ying Liu Jinjin Wang Fang Luan Wei Shi Faliang Zhu Wensheng Sun Lining Zhang Chengjiang Gao Lifen Gao Xiaohong Liang Chunhong Ma 2009Cellular & Molecular Immunology2009,6,1:19
17Estimation of Undrained Bearing Capacity for Offshore Soft Foundations with Cyclic Load显示文摘The degradation strength of soils under cyclic loading is studied and a method for deter-mining the cyclic degradation strength with cyclic triaxial tests is given in the paper.Furthermore,a dum-my static method for estimating the undrained bearing capacity for offshore soft foundation under waveloads is developed.It can consider the effect of the difference of cyclic stress for different parts of the foun-dation on both the degradation strength of the foundation soil and the bearing capacity so that the esti-mated result can better reflect the real condition of foundation under cyclic loading.The method can be ap-plied to plane and space problem.Wang, JH Liu, YF Xing, Y Di, HM 1998China Ocean Engineering1998,13,2:18
18Process analysis of PM_(2.5) pollution events in a coastal city of China using CMAQ显示文摘US EPA's Community Multiscale Air Quality modeling system(CMAQ) with Process Analysis tool was used to simulate and quantify the contribution of individual atmospheric processes to PM_(2.5) concentration in Qingdao during three representative PM_(2.5) pollution events in the winter of 2015 and 2016. Compared with the observed surface PM_(2.5) concentrations, CMAQ could reasonably reproduce the temporal and spatial variations of PM_(2.5) during these three events. Process analysis results show that primary emissions accounted for 72.7%–93.2% of the accumulation of surface PM_(2.5) before and after the events.When the events occurred, primary emissions were still the major contributor to the increase of PM_(2.5) in Qingdao, however the contribution percentage reduced significantly,which only account for 51.4%–71.8%. Net contribution from horizontal and vertical transport to the accumulation of PM_(2.5) was also positive and its percentage increased when events occurred. Only 1.1%–4.6% of aerosol accumulation was due to PM processes and aqueous chemical processes before and after events. When the events occurred,contribution from PM processes and aqueous chemistry increased to 6.0%–11.8%. Loss of PM_(2.5) was mainly through horizontal transport, vertical transport and dry deposition, no matter during or outside the events. Wet deposition would become the main removal pathway of PM_(2.5), when precipitation occurred.Qiang Zhang Di Xue Xiaohuan Liu Xiang Gong Huiwang Gao 2019Journal of Environmental Sciences2019,31,5:17
19Astragalus extract inhibits destruction of gastric cancer cells to mesothelial cells by anti-apoptosis显示文摘AIM: To determine the inhibitory effect of Astragalus memebranaceushas on gastric cancer cell supernatantinduced apoptosis of human peritoneal mesothelial cells. METHODS: Human peritoneal mesothelial cell (HPMC) line HMrSV5 was co-incubated with gastric cancer cell supernatant (MKN45) and/or Astragalus memebranaceushas. Morphological changes in gastric cancer cells were observed under phase-contrast microscope. Quantitative cell damage was determined by MTT assay. Apoptosis was determined under transmission electron microscope and quantified by detecting acridine orange/ethidium bromide-stained (AO/EB) condensed nuclei under fluorescent microscope or by flow cytometry. Expressions of Bcl-2 and Bax were evaluated with immunostaining. RESULTS: Morphological changes and exfoliation occurred and naked areas appeared in cultured HMrSV5 cells 24 h after they were treated with gastric cancer cell supernatant. Cell supernatant from MKN45 gastric cancer cells induced apoptosis of HMrSV5 cells in a time-dependent manner. Obvious morphological changes were observed in cell apoptosis, such as condensation of chromatin, nuclear fragmentations and apoptotic bodies. Astragalus memebranaceus could partly suppress these changes and regulate the expressions of Bcl-2 and Bax in HMrSV5 cells.CONCLUSION: Gastric cancer cells induce apoptosis of HPMCs through the supernatant. Astragalus memebranaceushas inhibits this phenomenon and can be used an adjuvant chemothera-peutic agent in gastric cancer therapy.Di Na Fu-Nan Liu Zhi-Feng Miao Zong-Min Du Hui-Mian Xu 2009World Journal of Gastroenterology2009,15,5:17
20Short-term memory of danger signals or environmental stimuli in mesenchymal stem cells: implications for therapeutic potential显示文摘间充质的 stem/stromal 房间(MSC ) 拥有有免疫力的房间的一些特征,包括支持 inflammatory 显型,抑制免疫力的显型,抗菌剂性质和像使用费的受体蛋白质的表示。这里,我们显示出那,类似于有免疫力的房间, MSC 为时间的一个时期从危险信号或环境刺激保留信息。当与支持 inflammatory 因素 lipopolysaccharide (LPS ) 或肿瘤坏死 factor-α 对待时;(TNF-α) , MSC 显示增加了 IL-6, IL-8 和 MCP-1 的表示。当刺激因素, IL-6 的表示, IL-8 和 MCP-1 不在时的后面的小块地 re 和几轮房间部门仍然保持比在未经治疗的房间高超过 7 天。当房间暴露于秒轮刺激时,在 cytokine 分泌物的尖铁发生了。我们与 LPS 和告知 LPS 的 MSC 告知 MSC 在在一只糖尿病的老鼠支持皮肤拍动幸存的治疗学的功效最好比的当模特儿 unprimed MSC。最后,我们发现包括 miR146a, miR150 和 miR155,与由 5-hydroxymethylcytosine (5hmC ) 的 DNA 的修正一起,几 microRNAs 调停对 LPS 和 TNF-α 的 MSC 反应;刺激。一起,我们的数据建议 MSC 有环境信号的短期的记忆,它可以影响他们的治疗学的潜力。Guang-Yang Liu Yang Liu Ying Lu Ya-Ru Qin Guo-Hu Di Yong-Hong Lei Hu-Xian Liu Yan-Qi Li Chutse Wu Xian-Wen Hu Hai-Feng Duan 2016Cellular & Molecular Immunology2016,13,3:17
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