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1Estimation of internal nutrient release in large shallow Lake Taihu, China显示文摘Based on field investigation of wave, sediment suspension and the changes in nutrient concentration of the water column in Lake Taihu, China, we proposed two release models to quantify nutrient release under static and dynamic conditions, respectively. Under static conditions, nutrient release from sediments to the overlying water mainly depends on chemical diffusion induced by concentration gradient, in which the nutrient release is controlled by the temperature, dissolved oxygen concentration in the sediment-water interface, oxidation-reduction potential and the concentration difference between porewater and overlying water. Under dynamic condition (or disturbed condition),both dissolved and particulate nutrients in sediments are released into the water column because of wind-induced sediment suspension. The amount of nutrient release under dynamic conditions is larger than that under the static condition. The release of dissolved nutrients, however, does not increase because the wind induced turbulence made oxidation of metallic elements such as Fe (ferric iron), Mn which are capable of precipitating soluble reactive phosphate (SRP). Under dynamic conditions, therefore, the release of total phosphorus (TP) increases dramatically but the release of SRP is close to those under static conditions. In sediments of Lake Taihu, high Fe content leads to a high ratio of Fe to P contents in sediments (Fe:P ratio). Under dynamic conditions, therefore, nutrient release is controlled by the intensity of disturbance, sediment consolidation and nutrient content in sediments.As for dissolved nutrients, especially SRP, the release is also controlled by the intensity of dynamic re-oxidation, Fe content in sediments and nutrient concentration gradient between porewater and overlying water. Based on these two release modes, the release flux in Lake Taihu has been estimated. In the static condition (i.e. laboratory experimental condition), total release of NH4+-N for whole lake is ca. 10,000 ton/a, and PO43--P is ca. 900 ton/a. In the dynamic condition, nutrient release following sediment suspension was estimated according to three different intensities of wind forcing which were defined as 'calm' (wind speed is less than 2 m/s), 'gentle' (wind speed is greater than 2 m/s and less than 6 m/s) and 'gust' (wind speed is greater than 6 m/s). The release rate in the condition of 'calm' was estimated in terms of the nutrient release in the laboratory experimental static condition; whereas the release rate in conditions of 'gentle' and 'gust' was estimated in terms of measurement during sediment resuspension conducted in flume experiments. With the observation of wind velocity and frequency in 2001, each type of wind forcing took the frequency of 12%, 82% and 6% for 'calm', 'gentle' and 'gust', respectively. The yearly release of nitrogen was 81,000 ton and phosphorus was 21,000 ton, which is about 2-6 folds of annual external loading, respectively.QIN Boqiang, ZHU Guangwei, ZHANG Lu, LUO Liancong, GAO Guang & GU Binhe Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China Everglades Department, South Florida Water Management District, 3301 Gun Club Road, West Palm Beach, FL 33406, USA 2006Science China Earth Sciences2006,49,z1:37
2Effective treatment of manganese-induced occupational parkinsonism with p-aminosalicylic acid: a case of 17-year follow-up study.显示文摘Jiang YM Mo XA Du FQ Fu X Zhu XY Gao HY Xie JL Liao FL Pira E Zheng W 2006中国生物学文摘2006,20,8:23
3Association of N-terminal pro-brain natriuretic peptide with the severity of coronary artery disease in patients with normal left ventricular ejection fraction显示文摘Wu NQ Guo YL Li XL Liu J Qing P Xu RX Zhu CG Jia Y J Liu G Dong Q Jiang LX Li J J Ma FL 2014Chinese Medical Journal2014,,4:23
4mergy evaluation of the environment and economy of Hong Kong显示文摘EmergyevaluationoftheenvironmentandeconomyofHongKongLanShengfangDepartmentofBiology,SouthChinaAgriculturalUniversity,Guangzho...Lan ShengfangDepartment of Biology, South China Agricultural University,Guangzhou 510642, ChinaHoward T. Odum(Environmental Engineering Sciences , University of Florida .Gainesville, FL 32611 , USA) 1994Journal of Environmental Sciences1994,6,4:20
5Effect of PA-MSHA vaccine on plasma phospholipids metabolic profiling and the ratio of Th2/Thl cells within immune organ of mouse IgA nephropathy显示文摘Jia, LW Wang, C Kong, HW Yang, J Li, FL Lv, S Xu, GW 2007中国生物学文摘2007,21,11:19
6Nicotine attenuates beta-amyloid-induced neurotoxicity by regulating metal homeostasis.显示文摘Zhang J Liu Q Chen Q Liu NQ Li FL Lu ZB Qin C Zhu H Huang YY He W Zhao BL 2006中国生物学文摘2006,20,9:17
7Use of second generation contrast-enhanced ultrasound in the assessment of focal liver lesions显示文摘Ultrasound (US) is often the first imaging modality employed in patients with suspected focal liver lesions. The role of US in the characterisation of focal liver lesions has been transformed with the introduction of specific contrast media and the development of specialized imaging techniques. Ultrasound now can fully characterise the enhancement pattern of hepatic lesions, similar to that achieved with contrast enhanced multiphasic computed tomography (CT) and magnetic resonance imaging (MRI). US contrast agents are safe, well-tolerated and have very few contraindications. Furthermore, real-time evaluation of the vascularity of focal liver lesions has become possible with the use of the newer microbubble contrast agents. This article reviews the enhancement pattern of the most frequent liver lesions seen, using the second generation US contrast media. The common pitfalls for each type of lesion are discussed. The recent developments in US contrast media and specific imaging techniques have been a major advance and this technique, in view of the intrinsic advantages of US, will undoubtedly gain popularity in the years to come.Stanislas HX Morin Adrian KP Lim eremy FL Cobbold Simon D Taylor-Robinson 2007World Journal of Gastroenterology2007,13,45:16
8Helicobacter pylori infection: Host immune response, implications on gene expression and microRNAs显示文摘Helicobacter pylori(H. pylori) infection is the most common bacterial infection worldwide. Persistent infection of the gastric mucosa leads to inflammatory processes and may remain silent for decades or progress causing more severe diseases, such as gastric adenocarcinoma. The clinical consequences of H. pylori infection are determined by multiple factors, including host genetic predisposition, gene regulation, environmental factors and heterogeneity of H. pylori virulence factors. After decades of studies of this successful relationship between pathogen and human host, various mechanisms have been elucidated. In this review, we have made an introduction on H. pylori infection and its virulence factors, and focused mainly on modulation of host immune response triggered by bacteria, changes in the pattern of gene expression in H. pylori-infected gastric mucosa, with activation of gene transcription involved in defense mechanisms, inflammatory and immunological response, cell proliferation and apoptosis. We also highlighted the role of bacteria eradication on gene expression levels. In addition, we addressed the recent involvement of different microRNAs in precancerous lesions, gastric cancer, and inflammatory processes induced by bacteria. New discoveries in this field may allow a better understanding of the role of major factors involved in the pathogenic mechanisms of H. pylori.Aline Cristina Targa Cadamuro Ana Flávia Teixeira Rossi Nathália Maciel Maniezzo Ana Elizabete Silva 2014World Journal of Gastroenterology2014,20,6:16
9Helicobacter pylori: the primary cause of duodenal ulceration or a secondary infection?显示文摘INTRODUCTIONIt is generally accepted that Helicobacter pylori ( H.pylori) infection has a role in duodenal ulceration .Eradicaton of H .pylori accelerates healing compared with placebo in the absence of control of gastric secretion and reduces ulcer recurrence .There is increasing evidence ,however ,that is may not be the primary cause of duodenal ulceration ,but that is may be a secondary factor in a nnmber of cases .This possibility is supported by four sets of observations : 1 Geographical distribution:M Hobsley Fl Tovey 2001World Journal of Gastroenterology2001,7,2:13
10Eco-economic evolution, emergy evaluation and policy options for the sustainable development of Tibet显示文摘As economies and ecological support systems become more interdependent, new disciplines are needed to 'bridge the gap' of understanding between societies and nature. It is now clear that neither ecology nor economics alone can address the problems of our global commons. New measures of wealth, of value, of contributions and production are needed that acknowledge the 'natural capital' and 'ecosystem services' provided from healthy environments. A new interface is now being recognized termed 'eco-economics'. It is an ambitious and necessary attempt to understand the affairs of humanity and nature as a single, interdependent system. New tools are being invested to measure wealth. services and production fairly and equitably. In this report we use systems analysis approach to study the combined ecological-economic system of Tibet We use an alternative measure of value, based on real contributions to system performance, termed EMERGY, spelt with an 'M'. It is an accounting unit of total contributions, direct and indirect. used in generating a product or service. It is a concept derived from understanding whole systems, their interactions and interdependence, and the resources driving and maintaining them. This broader approach will help us to investigate Tibetan resources utilization and potentialities and exchange. Emergy analysis allows comparison and incroporation of environmental costs and benefits with variables of traditional economic costs and benefits to provide a more comprehensive perspective for public policy directives. Through this research, we think: 1) China has made a great effort in making Tibet develop from a closed regional system to a more and more opened regional system which is very important to the sustainable development of Tibet. 2) The increase of economic development and population growth has a close relationship with the total emergy storage and use in transportation. Education in modern science and technology increased the shared emergy of Tibetans to modern science and technology and stimulated the process of matching material and energy imports from outside with local resources. 3) There is great potential to develop hydropower and geothermal reserves that may stimulate not only economic development but also the better use of environment. 4) The better trained population can increase the empower of Tibet eco-economic system. Future development needs all kinds of talent exchanges with the outside system to develop education. 3) Compared with the Tibet economic system, Taiwan economic system is much more competitive. GNP and emergy use are very useful functions for comparing the competitive power of different ecological economic systems.YAN Mao-chao, H. T. Odum ( Commission for Integrated Survey of Natural Resources, Chinese Academy of Sciences, Beijing, China, Center for Environmental Policy, Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL, USA) 2000Journal of Geographical Sciences2000,10,1:13
11肝细胞癌复发来源的研究显示文摘梁小浣 Ivau.,FL 1991中华肿瘤杂志1991,13,1:13
12Conventional therapy for moderate to severe inflammatory bowel disease: A systematic literature review显示文摘BACKGROUND Despite the advent of biological drugs, conventional therapy continues to be used in moderate to severe inflammatory bowel disease(MS-IBD). This study hypothesized that as a standard of treatment and the primary alternative to biologics, conventional therapy should present robust effectiveness results in IBD outcomes.AIM To investigate the effectiveness of conventional therapy for MS-IBD.METHODS A systematic review with no time limit was conducted in July 2017 through the Cochrane Collaboration, MEDLINE, and LILACS databases. The inclusion criteria encompassed meta-analyses, systematic reviews, randomized clinical trials, observational and case-control studies concerning conventional therapy in adult patients with MS-IBD, including Crohn's disease(CD) and ulcerative colitis(UC). Corticosteroids(prednisone, hydrocortisone, budesonide, prednisolone,dexamethasone), 5-aminosalicylic acid(5-ASA) derivatives(mesalazine and sulfasalazine) and immunosuppressants [azathioprine(AZA), methotrexate(MTX), mycophenolate, cyclosporine, tacrolimus, 6-mercaptopurine(6-MP)] were considered conventional therapy. The exclusion criteria were sample size below50; narrative reviews; specific subpopulations(e.g., pregnant women,comorbidities); studies on postoperative IBD; and languages other than English,Spanish, French or Portuguese. The primary outcome measures were clinical remission(induction or maintenance), clinical response and mucosal healing. As secondary outcomes, fecal calprotectin, hospitalization, death, and surgeries were analyzed. The quality of the evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation criteria.RESULTS The search strategy identified 1995 citations, of which 27 were considered eligible(7 meta-analyses, 20 individual studies). For induction of clinical remission, four meta-analyses were selected(AZA and 6-MP showed no advantage over placebo,MTX or 5-ASA in CD; MTX showed no statistically significant difference versus placebo, 6-MP, or 5-ASA in UC; tacrolimus was superior to placebo for UC in two meta-analyses). Only one meta-analysis evaluated clinical remission maintenance, showing no statistically significant difference between MTX and placebo, 5-ASA, or 6-MP in UC. AZA and 6-MP had no advantage over placebo in induction of clinical response in CD. Three meta-analyses showed the superiority of tacrolimus vs placebo for induction of clinical response in UC. The clinical response rates for cyclosporine were 41.7% in randomized controlled trials(RCTs) and 55.4% in non-RCTs for UC. For induction of mucosal healing,one meta-analysis showed a favorable rate with tacrolimus versus placebo for UC. For secondary outcomes, no meta-analyses specifically evaluated fecal calprotectin, hospitalization or death. Two meta-analyses were retrieved evaluating colectomy rates for tacrolimus and cyclosporine in UC. Most of the twenty individual studies retrieved contained a low or very low quality of evidence.CONCLUSION High-quality evidence assessing conventional therapy in MS-IBD treatment is scarce, especially for remission maintenance, mucosal healing and fecal calprotectin.Adérson Omar Mourao Cintra Damiao Matheus Freitas Cardoso de Azevedo Alexandre de Sousa Carlos Marcela Yumi Wada Taciana Valéria Marcolino Silva Flávio de Castro Feitosa 2019World Journal of Gastroenterology2019,25,9:13
13Current and future applications of in vitro magnetic resonance spectroscopy in hepatobiliary disease显示文摘原子磁性的回声光谱学允许细胞的生物化学和新陈代谢的学习,在整个身体在活体内并且在更高的磁场力量在试管内。因为这种技术非侵略、非选择,磁性的回声光谱学方法论广泛地在生物化学和药被使用了。房间,身体液体和纸巾的在试管内磁性的回声光谱学研究在医药生物化学被使用了调查 pathophysiological 过程,更最近,这种技术被医生使用了决定疾病畸形在活体内。这个加亮的话题说明在试管内的潜力在学习肝胆管系统的磁性的回声光谱学。在恶意、非恶意的肝疾病和胆汁作文的学习的磁性的回声光谱学学习的在试管内质子和磷的角色被讨论,特别地与关联词在活体内的参考整个身体的磁性的回声光谱学应用。在摘要,磁性的回声光谱学技术能在到内在的 pathophysiological 过程的疾病严厉和指针上提供非侵略的生物化学的信息。磁性的回声光谱学为疾病简历标记,以及估计的治疗学的反应作为一个屏蔽工具保持潜在的诺言。I Jane Cox Amar Sharif Jeremy FL Cobbold Howard C Thomas Simon D Taylor-Robinson 2006World Journal of Gastroenterology2006,12,30:10
14PARTICLE CHARACTERIZATION: LIGHT SCATTERING METHODS显示文摘Renliang Xu Beckman Coulter, Miami, FL, USA 2003China Particuology2003,1,6:9
15What are the ten new commandments in severe polytrauma management?显示文摘CW Kam CH Lai SK Lam FL So CL Lau KH Cheung 2010World Journal of Emergency Medicine2010,1,2:9
16Cloning and expression of NS3 cDNA fragment of HCV genome of Hebei isolate in E.coli显示文摘CloningandexpressionofNS3cDNAfragmentofHCVgenomeofHebeiisolateinE.coliZHUFenLu,LUHaoYing,LIZhuoandQIZhongTianSubjectheadin...Zhu, FL Lu, HY Li, Z Qi, ZT 1998World Journal of Gastroenterology1998,4,2:7
17高吸水聚合物(SAP):新型多功能混凝土外加剂Viktor Mechtcherine Lukasz Dudziak Arnd-Eike Brüdern Simone Hempel Christof Schrfl 俞琳 2012商品混凝土2012,0,5:6
18Clinical and histopathological correlations of fecal calprotectin release in colorectal carcinoma显示文摘AIM:To determine calprotectin release before and after colorectal cancer operation and compare it to tumor and histopathological parameters.METHODS:The study was performed on patients with diagnosed colorectal cancer admitted for operation.Calprotectin was measured in a single stool sample before and three months after the operation using an enzymelinked immunosorbent assay(ELISA).Calprotectin levels greater than or equal to 50μg/g were considered positive.The compliance for collecting stool samples was assessed and the value of calprotectin was correlated to tumor and histopathological parameters of intra-and peri-tumoral inflammation.Surgical specimens were fixed in neutral buffered formalin and stained with hematoxylin and eosin.Staging was performed according to the Dukes classification system and the 7th edition tumor node metastasis classification system.Intra-and peri-tumoral inflammation was graded according to the Klintrup criteria.Immunohistochemical quantification was performed for MPO,CD45R0,TIA-1,CD3,CD4,CD8,CD57,and granzyme B.Statistical significance was measured using Wilcoxon signed rank test,Kruskal Wallis test and Spearman’s rank correlation coefficient as appropriate.RESULTS:Between March 2009 and May 2011,80 patients with colorectal cancer(46 men and 34 women,with mean age of 71±11.7 years old)were enrolled in the study.Twenty-six patients had rectal carcinoma,29 had left-side tumors,23 had right-side tumors,and2 had bilateral carcinoma.In total,71.2%of the patients had increased levels of calprotectin before the operation(median 205μg/g,range 50-2405μg/g)and experienced a significant decrease three months after the operation(46μg/g,range 10-384μg/g,P<0001).The compliance for collecting stool samples was 89.5%.Patients with T3 and T4 tumors had significantly higher values than those with T1 and T2 cancers(P=0.022).For all other tumor parameters(N,M,G,L,V,Pn)and location,no significant difference in calprotectin concentration was found.Furthermore,the calprotectin levels and histological grading of both peri-and intra-tumoral inflammation was not correlated.Additional testing with specific markers for lymphocytes and neutrophils also revealed no statistically significant correlation.CONCLUSION:Fecal calprotectin decreases significantly after colorectal cancer operation.Its value depends exclusively on the individual T-stage,but not on other tumor or histopathological parameters.Frank Serge Lehmann Francesca Trapani Ida Fueglistaler Luigi Maria Terracciano Markus von Flüe Gieri Cathomas Andreas Zettl Pascal Benkert Daniel Oertli Christoph Beglinger 2014World Journal of Gastroenterology2014,20,17:6
19MLVA-16 对新疆分离布鲁氏菌80/23株的鉴定与分析显示文摘为了对新疆布鲁氏菌分离株80/23株进行分型鉴定,本实验采用MLVA-16检测方法和常规生物学鉴定方法对布鲁氏80/23株进行研究,将测定结果与http://gffzzc70700eb713d4f53hoxqcb9pkvx0p69wp.ffgz.tsg.suse.edu.cn/MLVA net提供的530株布鲁氏菌数据库比较分析,应用UPGMA进行遗传进化树分析,并构建系统进化树。结果显示,常规分型方法鉴定为羊种3型,MLVA方法鉴定该菌株与德国分离株Bruce0261菌株的亲缘关系最近,属为东地中海3型,羊种1型,两种分型方法种属结果一致。结论:MLVA-16与常规生物学鉴定方法相比,具有更高的精确性,对布鲁氏菌生物型和株间差异有很高的鉴别力。并能为布病疫情流行株的溯源进化关系提供依据。任晓莉 王慧 陈创夫 王远志 张亚丽 Philippe Le Flèche 2013石河子大学学报(自然科学版)2013,31,3:6
20Upregulation of the APE1 and H2AX genes and miRNAs involved in DNA damage response and repair in gastric cancer显示文摘Gastric cancer remains one of the leading causes of cancer-related death worldwide,and most of the cases are associated with Helicobacter pylori infection.This bacterium promotes the production of reactive oxygen species(ROS),which cause DNA damage in gastric epithelial cells.In this study,we evaluated the expression of important genes involved in the recognition of DNA damage(ATM,ATR,and H2AX)and ROS-induced damage repair(APE1)and the expression of some miRNAs(miR-15a,miR-21,miR-24,miR-421 and miR-605)that target genes involved in the DNA damage response(DDR)in 31 fresh tissues of gastric cancer.Cytoscape v3.1.1 was used to construct the postulated miRNA:mRNA interaction network.Analysis performed by real-time quantitative PCR exhibited significantly increased levels of the APE1(RQ=2.55,p<0.0001)and H2AX(RQ=2.88,p=0.0002)genes beyond the miR-421 and miR-605 in the gastric cancer samples.In addition,significantly elevated levels of miR-21,miR-24 and miR-421 were observed in diffuse-type gastric cancer.Correlation analysis reinforced some of the gene:gene(ATM/ATR/H2AX)and miRNA:mRNA relationships obtained also with the interaction network.Thus,our findings show that tumor cells from gastric cancer presents deregulation of genes and miRNAs that participate in the recognition and repair of DNA damage,which could confer an advantage to cell survival and proliferation in the tumor microenvironment.Fernanda S.Manoel-Caetano Ana Flávia T.Rossi Gabriela Calvet de Morais Fábio Eduardo Severino Ana Elizabete Silva 2019Genes & Diseases2019,6,2:5
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