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Arce, Debora Pamela,Tonon, Claudia,Zanetti, Maria Eugenia,Godoy, Andrea Veronica,Hirose, Susumu,Casalongue, Claudia Anahi Korean Society for Biochemistry and Molecular Biol 2006 Journal of biochemistry and molecular biology Vol.39 No.4
To gain a better understanding on the function of the potato Solanum tuberosum Multiprotein Bridging Factor 1 protein (StMBF1) its interaction with the TATA box binding protein (TBP) was demonstrated. In addition we reported that StMBF1 rescues the yeast mbf1 mutant phenotype, indicating its role as a plant co-activator. These data reinforce the hypothesis that MBF1 function is also conserved among non closely related plant species. In addition, measurement of StMBF1 protein level by Western blot using anti-StMBF1 antibodies indicated that the protein level increased upon $H_2O_2$ and heat shock treatments. However, the potato $\beta$-1,3-glucanase protein level was not changed under the same experimental conditions. These data indicate that StMBF1 participates in the cell stress response against oxidative stress allowing us to suggest that MBF1 genes from different plant groups may share similar functions.
Tobamovirus Coat Protein CPCg Induces an HR-like Response in Sensitive Tobacco Plants
Patricio Arce-Johnson,Nicole Ehrenfeld,Paola Canon,Claudia Stange,Consuelo Medina 한국분자세포생물학회 2005 Molecules and cells Vol.19 No.3
When inoculated into sensitive tobacco Xanthi-nn plants, the crucifer and garlic-infecting Tobacco mosaic virus (TMV-Cg) induces local necrotic lesions that resemble those seen in the hypersensitive response (HR) of resistant tobacco plants. However, unlike these, tobacco Xanthi-nn plants do not become resistant to infection and the virus spreads systemically causing a severe disease characterized by necrotic lesions throughout the plant. To identify the viral protein that elicits this necrotic response, we used a set of hybrid viruses constructed by combination of TMV-Cg and the tobacco mosaic virus strain U1 (TMV-U1). In this study we present evidence that the coat protein of TMV-Cg (CPCg) is the elicitor of the necrotic response in tobacco Xanthi-nn plants. Local and systemic necrotic lesions induced by TMV-Cg and by the hybrid U1-CPCg -that carries CPCg in a TMV-U1 context- are characterized by cell death and by the presence of autoflorescent phenolic compounds and H2O2, just like the HR lesions. In addition, defense-related genes and detoxifying genes are induced in tobacco Xanthi-nn plants after TMV-Cg and U1-CPCg inoculation. We postulate that in our system, CPCg is recognized by sensitive tobacco plants that mount an incomplete defense response. We call this an HR-like since it is not enough to induce plant resistance.
( Edith Perez De Arce ),( Glauben Landskron ),( Sandra Hirsch ),( Carlos Defilippi ),( Ana Maria Madrid ) 대한소화기기능성질환·운동학회 2017 Journal of Neurogastroenterology and Motility (JNM Vol.23 No.2
Background/Aims Chronic intestinal pseudo-obstruction (CIPO) is a rare syndrome characterized by a failure of the propulsion of intraluminal contents and recurrent symptoms of partial bowel obstruction in the absence of mechanical obstruction. Regional variations of the intestinal compromise have been described. Intestinal manometry can indicate the pathophysiology and prognosis. Our objective is to establish the demographic and clinical characteristics of group Chilean patients and analyze the motility of the small intestine and its prognostic value. Methods Patients with symptoms of intestinal pseudo-obstruction with dilated bowel loops were included, in all of whom a manometry of the small intestine was performed using perfused catheters. Results Of the 64 patients included, 51 women (average age 41.5 ± 17.6 years), 54 primary and 10 secondary CIPO were included. Dilatation of the small intestine was the only finding in 38 patients; in the remaining, the compromise was associated with other segments, primarily the colon. Forty-nine patients underwent 65 surgeries, mainly exploratory laparotomies and colectomies. Intestinal manometry was performed on all patients; 4 “patterns” were observed: neuropathic (n = 26), myopathic (n = 3), mixed (n = 24), and a group without motor activity (n = 11). The most relevant findings were the complex migrating motor disorders and decreased frequency and propagation of contractions. The 9 patients who died had a severe myopathic compromise. Conclusions In our series, isolated small bowel compromise was the most common disorder. Neuropathic motor compromise was observed in most of the patients. Mortality was associated with severe myopathic compromise. (J Neurogastroenterol Motil 2017;23:273-280)
Elias Said-Hung,Sergio Arce-García,Daria Mottareale-Calvanese 한국과학학술지편집인협의회 2024 Science Editing Vol.11 No.2
Purpose: This study aimed to examine how educational researchers in Spain promoted the dissemination of scientific knowledge on Twitter/X as a platform and to contrast their approach with science influencers in the same country. Methods: Accounts on the Twitter/X service belonging to 210 Spanish researchers were analyzed, and their 2016–2020 tweets were compared to those of 38 Twitter/X influencers. Text mining techniques, sentiment and emotion analysis, network analysis, and the Kardashian index (K-index) were used in the study. Results: The results indicated a low academic presence of researchers (4.4%) on Twitter/X. The researchers shared 185,020 posts (38.7% original content and 61.3% retweets). A network analysis revealed low interconnectivity among researchers, with distinct clusters based on their interests or affiliations. The top influencers had strong connections with the news media. The researchers focused minimally on academic topics, while the influencers emphasized the dissemination of scientific findings. The impact of the researchers’ posts was minimal, with low K-index values, whereas the influencers had greater reach because of their follower base. Conclusion: When using Twitter/X, the researchers had a minimal impact on the dissemination of scientific information because they published few original posts and relied instead on retweets unrelated to their academic or research activities. Consequently, the researchers did not use Twitter/X as a tool for scientific communication, which limited the potential for forming new connections beyond their existing social and academic networks. Promoting informal learning that encompasses diverse knowledge and learning levels is crucial to fostering greater engagement and collaboration.
Recent developments in G<small>EANT</small>4
Allison, J.,Amako, K.,Apostolakis, J.,Arce, P.,Asai, M.,Aso, T.,Bagli, E.,Bagulya, A.,Banerjee, S.,Barrand, G.,Beck, B.R.,Bogdanov, A.G.,Brandt, D.,Brown, J.M.C.,Burkhardt, H.,Canal, Ph.,Cano-Ott, D. Elsevier 2016 Nuclear Instruments & Methods in Physics Research. Vol.835 No.-
<P><B>Abstract</B></P> <P>G<SMALL>EANT</SMALL>4 is a software toolkit for the simulation of the passage of particles through matter. It is used by a large number of experiments and projects in a variety of application domains, including high energy physics, astrophysics and space science, medical physics and radiation protection. Over the past several years, major changes have been made to the toolkit in order to accommodate the needs of these user communities, and to efficiently exploit the growth of computing power made available by advances in technology. The adaptation of G<SMALL>EANT</SMALL>4 to multithreading, advances in physics, detector modeling and visualization, extensions to the toolkit, including biasing and reverse Monte Carlo, and tools for physics and release validation are discussed here.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Multithreading resulted in a smaller memory footprint and nearly linear speed-up. </LI> <LI> Scoring options, faster geometry primitives, more versatile visualization were added. </LI> <LI> Improved electromagnetic and hadronic models and cross sections were developed. </LI> <LI> Reverse Monte Carlo and general biasing methods were added. </LI> <LI> Physics validation efforts were expanded and new validation tools were added. </LI> </UL> </P>
Félix Téllez-Ávila,Josué Barahona-Garrido,Sandra García-Osogobio,Gustavo López-Arce,Jesús Camacho-Escobedo,Angela Saúl,Salvador Herrera-Gómez,Javier Elizondo-Rivera,Rafael Barreto-Zúñiga 대한소화기내시경학회 2014 Clinical Endoscopy Vol.47 No.1
Background/Aims: No clear data have been established and validated regarding whether rectal retroflexion has an important and therapeutic impact. The aim of the present study was to evaluate the diagnostic yield and therapeutic impact of rectal retroflexion compared with straight view examination. Methods: A prospective single-blind study was conducted. Consecutive patients evaluated between October 2011 and April 2012 were included. Results: A total of 934 patients (542 women [58%]) were included. The mean age was 57.4±14.8 years. Retroflexion was successful in 917 patients (98.2%). Distinct lesions in the anorectal area were detected in 32 patients (3.4%), of which 10 (1%) were identified only on retroflex view and 22 (2.4%) on both straight and retroflex views. Of the 32 identified lesions, 16 (50%) were polyps, nine (28.1%) were angiodysplasias, six (18.8%) were ulcers, and one (3.1%) was a flat lesion. All 10 patients (1%) in whom lesions were detected only by rectal retroflexion showed a therapeutic impact. Conclusions: Rectal retroflexion has minimal diagnostic yield and therapeutic impact. However, its low rate of major complications and the possibility of detecting lesions undetectable by straight viewing justify its use.