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1864篇 您的检索式:作者名="Arroyo"
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1Soil Conservation Measures in Rainfed Olive Orchards in South-Eastern Spain: Impacts of Plant Strips on Soil Water Dynamics显示文摘Sloping and mountainous olive production systems are widespread, occupying large parts of the Mediterranean landscape prone to water erosion. Soil erosion, runoff, and soil water content patterns over a three-year period were monitored in erosion plots on a mountainside with rainfed olive (Olea europaea cv. Picual) trees under: 1) non-tillage with barley strips of 4 m width (BS); 2) non-tillage with native vegetation strips of 4 m width (NVS); and 3) non-tillage without plant strips (NT). The erosion plots, located in Lanjaron (Granada, south-eastern Spain), on a 30% slope, were 192 m2 in area. For assessing soil water dynamics in real-time and near-continuous soil water content measurements, multisensor capacitance probes were installed in the middle of plant strips and beneath the olive tree at five soil depths (10, 20, 30, 50, and 100 cm). The highest erosion and runoff rates were measured under NT, with a mean of 17.3 Mg ha-1 year-1 and 140.0 mm year-1, respectively, over the entire study period. The BS and NVS with respect to the NT reduced erosion by 71% and 59% and runo? by 95% and 94%, respectively. In general, greater available soil water content was found under BS than NVS and NT, especially beneath the olive tree canopies. These results supported the recommendation of non-tillage with barley strips in order to reduce erosion and to preserve soil water for trees in traditional mountainous olive-producing areas, where orchards cover vast tracts of land.V. H. DURN ZUAZO C. R. RODRíGUEZ PLEGUEZUELO L. ARROYO PANADERO A. MARTíNEZ RAYA J. R. FRANCIA MARTíNEZ B. CRCELES RODRíGUEZ 2009Pedosphere2009,19,4:8
2Telomerase activity in colorectal cancer,prognostic factor and implications in the microsatellite instability pathway显示文摘AIM: To determine whether the telomerase activity is related to the Microsatellite instability (MSI) genetic pathway and whether it means a difference in the survival. METHODS: The population consisted of 97 colorectal cancer patients. MSI determination was performed in accordance with the NCI criteria using PCR and Genescan. Telomerase activity was determined by the TRAP-assay, an ELISA procedure based on the amplification of telomeric repeat sequences. RESULTS: 6.2% showed high MSI (MSI-H), 10.3% showed low MSI (MSI-L) and 83.5% did not show this alteration (MSS). Positive telomerase activity was detected in 92.8% of the patients. 83.3% of MSI-H tumors showed positive telomerase against 93.8% of MSS tumors. In the overall survival analysis the absence of telomerase activity conferred a better prognosis. CONCLUSION: Previous works have shown that tumors which develop via the MSI pathway present a better prognosis. No link between telomerase activity and MSI status is observed, although sample sizes are small. Patients with telomerase negative tumors had better overall survival than patients with telomerase positive tumors.M Vidaurreta ML Maestro S Rafael S Veganzones MT Sanz-Casla J Cerdán M Arroyo 2007World Journal of Gastroenterology2007,13,28:8
3Immunohistochemical expression of SP-NK-1R-EGFR pathway and VDR in colonic inflammation and neoplasia显示文摘AIM:To determine the expression of neurokinin-1receptor(NK-1R),phosphorylated epidermal growth factor receptor(p EGFR),cyclooxygenase-2(Cox-2),and vitamin D receptor(VDR)in normal,inflammatory bowel disease(IBD),and colorectal neoplasia tissues from Puerto Ricans.METHODS:Tissues from patients with IBD,colitisassociated colorectal cancer(CAC),sporadic dysplasia,and sporadic colorectal cancer(CRC),as well as normal controls,were identified at several centers in Puerto Rico.Archival formalin-fixed,paraffin-embedded tissues were de-identified and processed by immunohistochemistry for NK-1R,p EGFR,Cox-2,and VDR.Pictures of representative areas of each tissues diagnosis were taken and scored by three observers using a4-point scale that assessed intensity of staining.Tissues with CAC were further analyzed by photographing representative areas of IBD and the different grades of dysplasia,in addition to the areas of cancer,within each tissue.Differences in the average age between the five patient groups were assessed with one-way analysis of variance and Tukey-Kramer multiple comparisons test.The mean scores for normal tissues and tissues with IBD,dysplasia,CRC,and CAC were calculatedand statistically compared using one-way analysis of variance and Dunnett’s multiple comparisons test.Correlations between protein expression patterns were analyzed with the Pearson’s product-moment correlation coefficient.Data are presented as mean±SE.RESULTS:On average,patients with IBD were younger(34.60±5.81)than normal(63.20±6.13,P<0.01),sporadic dysplasia(68.80±4.42,P<0.01),sporadic cancer(74.80±4.91,P<0.001),and CAC(57.50±5.11,P<0.05)patients.NK-1R in cancer tissue(sporadic CRC,1.73±0.34;CAC,1.57±0.53)and sporadic dysplasia(2.00±0.45)were higher than in normal tissues(0.73±0.19).p EGFR was significantly increased in sporadic CRC(1.53±0.43)and CAC(2.25±0.47)when compared to normal tissue(0.07±0.25,P<0.05,P<0.001,respectively).Cox-2 was significantly increased in sporadic colorectal cancer(2.20±0.23 vs 0.80±0.37 for normal tissues,P<0.05).In comparison to normal(2.80±0.13)and CAC(2.50±0.33)tissues,VDR was significantly decreased in sporadic dysplasia(0.00±0.00,P<0.001 vs normal,P<0.001 vs CAC)and sporadic CRC(0.47±0.23,P<0.001 vs normal,P<0.001 vs CAC).VDR levels negatively correlated with NK-1R(r=-0.48)and p EGFR(r=-0.56)in normal,IBD,sporadic dysplasia and sporadic CRC tissue,but not in CAC.CONCLUSION:Immunohistochemical NK-1R and p EGFR positivity with VDR negativity can be used to identify areas of sporadic colorectal neoplasia.VDR immunoreactivity can distinguish CAC from sporadic cancer.Raymond A Isidro Myrella L Cruz Angel A Isidro Axel Baez Axel Arroyo William A González-Marqués Carmen González-Keelan Esther A Torres Caroline B Appleyard 2015World Journal of Gastroenterology2015,21,6:7
4Expression of HER2 and bradykinin B_1 receptors in precursor lesions of gallbladder carcinoma显示文摘AIM:To determine the expression of HER2 and bradykinin B 1 receptors(B 1 R) in the two pathogenic models of gallbladder cancer:the metaplasia-dysplasia-carcinoma and the adenoma-carcinoma pathways.METHODS:Receptor proteins were visualized by immunohistochemistry on 5-μm sections of paraffin-embedded tissue.Expression of both receptors was studied in biopsy samples from 92 patients(6 males and 86 females;age ranging from 28 to 86 years,mean 56 years).High HER2 expression in specimens was additionally investigated by fluorescence in situ hybridiza-tion.Cell proliferation in each sample was assessed by using the Ki-67 proliferation marker.RESULTS:HER2 receptor protein was absent in adenomas and in normal gallbladder epithelium.On the contrary,there was intense staining for HER2 on the basolateral membrane of epithelial cells of intestinal metaplasia(22/24;91.7%) and carcinoma in situ(9/10;90%),the lesions that displayed a significantly high proliferation index.Protein up-regulation of HER2 in the epithelium with metaplasia or carcinoma in situ was not accompanied by HER2 gene amplification.A similar result was observed in invasive carcinomas(0/12).The B 1 R distribution pattern mirrored that of HER2 except that B 1 R was additionally observed in the adenomas.The B 1 R appeared either as cytoplasmic dots or labeling on the apical cell membrane of the cells composing the epithelia with intestinal metaplasia(24/24;100%) and carcinoma in situ(10/10;100%) and in the epithelial cells of adenomas.In contrast,both HER2(4/12;33%) and B 1 R(1/12;8.3%) showed a low expression in invasive gallbladder carcinomas.CONCLUSION:The up-regulation of HER2 and B1R in precursor lesions of gallbladder carcinoma suggests cross-talk between these two receptors that may be of importance in the modulation of cell proliferation in gallbladder carcinogenesis.Cesar Toledo Carola E Matus Ximena Barraza Pamela Arroyo Pamela Ehrenfeld Carlos D Figueroa Kanti D Bhoola Maeva del Pozo Maria T Poblete 2012World Journal of Gastroenterology2012,18,11:6
5Systemic, renal, and hepatic hemodynamic derangement in cirrhotic patients with spontaneous bacterial peritonitis显示文摘Luis Ruiz-del-Arbol Jesús Urman Javier Fernández Mónica González Miguel Navasa Alberto Monescillo Agustín Albillos Wladimiro Jiménez Vicente Arroyo 2003Hepatology2003,,5:4
6The management of ascites in cirrhosis: Report on the consensus conference of the International Ascites Club显示文摘Kevin P. Moore Florence Wong Pere Gines Mauro Bernardi Andreas Ochs Francesco Salerno Paolo Angeli Michael Porayko Richard Moreau Guadelupe Garcia-Tsao Wladimiro Jimenez Ramon Planas Vicente Arroyo 2003Hepatology2003,,1:4
7Diabetic gastroenteropathy:An underdiagnosed complication显示文摘This article is an extensive review that provides an update on the pathophysiology,symptoms,diagnosis,and treatment of diabetic gastroenteropathy.There is no reported prevalence,but it has been described that patients with type 1 diabetes have a cumulative incidence at 10 years of 5.2%,and type 2 patients,1%.Also,in the group of type 1 diabetes,it has been observed that women are more likely to present this condition(5.8%vs 3.5%).Many factors are associate with its development(e.g.,hyperglycemia,vagal dysfunction,loss of expression of neural nitric oxide synthase in the myenteric plexus,alterations in the Cajal interstitial cell network,and oxidative stress).Gastrointestinal discomfort could be perceived 70% higher in diabetic patients,describing that 25%of diabetic patients experience gastrointestinal symptoms.Diabetic enteropathy could affect any portion of the gastrointestinal tract,but esophageal alterations were described in more than 60% of diabetic patients,also 60% of them present constipation,and 20%,diarrhea.Gastric emptying scintigraphy is useful to evaluate gastroparesis,therefore,gastric retention of more than 60%at 2 h has a sensitivity of 100% and specificity of 20% for diagnosis;however,other studies such as breath tests,with a sensitivity of 89% and a specificity of 80%,or the endoscopic capsule contribute to the diagnosis.There is no cure;however,management must be multidisciplinary,focused on slowing the progression of diabetic gastroenteropathy,reducing symptoms,and restoring function;that includes nutritional recommendation,maintain glucose levels kept below 180 mg/dL,use of prokinetics,anti-emetics;nowadays,it has been special interest in surgical treatment,such as pyloroplasty,also gastric electrical stimulation appears to be another alternative.Marcio JoséConcepción Zavaleta Jhean Gabriel Gonzáles Yovera Diego Martín Moreno Marreros Luciana del Pilar Rafael Robles Kely Roxana Palomino Taype Karen Nohelly Soto Gálvez Luis Fernando Arriola Torres Julia Cristina Coronado Arroyo Luis Alberto Concepción Urteaga 2021World Journal of Diabetes2021,12,6:4
8Acute-on chronic liver failure显示文摘Rajiv Jalan Pere Gines Jody C Olson Rajeshwar P Mookerjee Richard Moreau Guadalupe Garcia-Tsao Vicente Arroyo Patrick S Kamath 2012Journal of Hepatology2012,,6:4
9Prevalence and risk factors of infections by multiresistant bacteria in cirrhosis: A prospective study显示文摘Javier Fernández Juan Acevedo Miriam Castro Orlando Garcia Carlos Rodríguez de Lope Daria Roca Marco Pavesi Elsa Sola Leticia Moreira Anibal Silva Tiago Seva‐Pereira Francesco Corradi Jose Mensa Pere Ginès Vicente Arroyo 2012Hepatology2012,,:4
10Ionic Species Affect the Self-Propulsion of Urease-Powered Micromotors显示文摘Enzyme-powered motors self-propel through the catalysis of in situ bioavailable fuels,which makes them excellent candidates for biomedical applications.However,fundamental issues like their motion in biological fluids and the understanding of the propulsion mechanism are critical aspects to be tackled before a future application in biomedicine.Herein,we investigated the physicochemical effects of ionic species on the self-propulsion of urease-powered micromotors.Results showed that the presence of PBS,NaOH,NaCl,and HEPES reduced self-propulsion of urease-powered micromotors pointing towards iondependent mechanisms of motion.We studied the 3D motion of urease micromotors using digital holographic microscopy to rule out any motor-surface interaction as the cause of motion decay when salts are present in the media.In order to protect and minimize the negative effect of ionic species on micromotors’performance,we coated the motors with methoxypolyethylene glycol amine(mPEG)showing higher speed compared to noncoated motors at intermediate ionic concentrations.These results provide new insights into the mechanism of urease-powered micromotors,study the effect of ionic media,and contribute with potential solutions to mitigate the reduction of mobility of enzyme-powered micromotors.Xavier Arque Xavier Andres Rafael Mestre Bernard Ciraulo Jaime Ortega Arroyo Romain Quidant Tania Patino Samuel Sanchez 2020Research2020,,1:3
11Analysis of the cryptocurrency market using different prototype-based clustering techniques显示文摘Since the emergence of Bitcoin,cryptocurrencies have grown significantly,not only in terms of capitalization but also in number.Consequently,the cryptocurrency market can be a conducive arena for investors,as it offers many opportunities.However,it is difficult to understand.This study aims to describe,summarize,and segment the main trends of the entire cryptocurrency market in 2018,using data analysis tools.Accord-ingly,we propose a new clustering-based methodology that provides complementary views of the financial behavior of cryptocurrencies,and one that looks for associations between the clustering results,and other factors that are not involved in clustering.Particularly,the methodology involves applying three different partitional clustering algorithms,where each of them use a different representation for cryptocurrencies,namely,yearly mean,and standard deviation of the returns,distribution of returns that have not been applied to financial markets previously,and the time series of returns.Because each representation provides a different outlook of the market,we also examine the integration of the three clustering results,to obtain a fine-grained analysis of the main trends of the market.In conclusion,we analyze the association of the clustering results with other descriptive features of cryptocurrencies,including the age,technological attributes,and financial ratios derived from them.This will help to enhance the profiling of the clusters with additional descriptive insights,and to find associations with other variables.Consequently,this study describes the whole market based on graphical information,and a scalable methodology that can be reproduced by investors who want to understand the main trends in the market quickly,and those that look for cryptocurrencies with different financial performance.In our analysis of the 2018 and 2019 for extended period,we found that the market can be typically segmented in few clusters(five or less),and even considering the intersections,the 6 more populations account for 75%of the market.Regarding the associations between the clusters and descriptive features,we find associations between some clusters with volume,market capitalization,and some financial ratios,which could be explored in future research.Luis Lorenzo Javier Arroyo 2022Financial Innovation2022,8,1:3
12Probiotics for human lactational mastitis显示文摘L. Fernández R. Arroyo I. Espinosa M. Marín E. Jiménez J.M. Rodríguez 2014Beneficial Microbes (-)2014,,1:3
13Bacterial infections in cirrhosis: Epidemiological changes with invasive procedures and norfloxacin prophylaxis显示文摘Javier Fernández Miquel Navasa Juliá Gómez Jordi Colmenero Jordi Vila Vicente Arroyo Juan Rodés 2002Hepatology2002,,1:3
14Factors related to quality of life in patients with cirrhosis and ascites: Relevance of serum sodium concentration and leg edema显示文摘Elsa Solà Hugh Watson Isabel Graupera Fanny Turón Rogelio Barreto Ezequiel Rodríguez Marco Pavesi Vicente Arroyo Mónica Guevara Pere Ginès 2012Journal of Hepatology2012,,6:3
15Definition and diagnostic criteria of refractory ascites and hepatorenal syndrome in cirrhosis显示文摘V Arroyo P Gines AL Gerbes FJ Dudley P Gentilini G Laffi TB Reynolds H Ring-Larsen J Scholmerich 1996Hepatology1996,,1:3
16Hepatic Expression of CXC Chemokines Predicts Portal Hypertension and Survival in Patients With Alcoholic Hepatitis显示文摘Marlene Dominguez Rosa Miquel Jordi Colmenero Montserrat Moreno Joan–Carles García–Pagán Jaime Bosch Vicente Arroyo Pere Ginès Juan Caballería Ramón Bataller 2009Gastroenterology2009,,5:3
17Renal Failure in Patients With Cirrhosis and Sepsis Unrelated to Spontaneous Bacterial Peritonitis: Value of MELD Score显示文摘Carlos Terra Mónica Guevara Aldo Torre Rosa Gilabert Javier Fernández Marta Martín-Llahí Maria E. Baccaro Miquel Navasa Conxita Bru Vicente Arroyo Juan Rodés Pere Ginès 2005Gastroenterology2005,,6:2
18Portal Hypertension and Its Complications显示文摘Arun J. Sanyal Jaime Bosch Andres Blei Vincente Arroyo 2008Gastroenterology2008,,6:2
19The Long-term Results of a Randomized Clinical Trial of Laparoscopy-assisted Versus Open Surgery for Colon Cancer显示文摘Antonio M. Lacy Salvadora Delgado Antoni Castells Hubert A. Prins Vicente Arroyo Ainitze Ibarzabal Josep M. Pique 2008Annals of Surgery2008,,1:2
20Acute-on-Chronic Liver Failure: Recent Concepts显示文摘Richard Moreau Rajiv Jalan Vicente Arroyo 2014Journal of Clinical and Experimental Hepatology2014,,:2
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