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E. Castillo,R. D?az 장전수학회 2007 Advanced Studies in Contemporary Mathematics Vol.15 No.1
We construct membrane homology groups H(M ) associated with each compact connected oriented smooth manifold, and show that H(M ) is a matrix graded algebra.
Patino-Portela, Melissa C.,Arciniegas-Grijalba, Paola A.,Mosquera-Sanchez, Lyda P.,Sierra, Beatriz E. Guerra,Munoz-Florez, Jaime E.,Erazo-Castillo, Luis A.,Rodriguez-Paez, Jorge E. Techno-Press 2021 Advances in nano research Vol.10 No.2
To compare the antifungal effect of two nanomaterials (NMs), nanoparticles of zinc oxide were synthesized by a chemical route and zinc oxide-based nanobiohybrids were obtained using green synthesis in an extract of garlic (Allium sativum). The techniques of X-Ray Diffraction (XRD), Infrared (IR) and Ultraviolet Visible (UV-Vis) absorption spectroscopies and Scanning (SEM) and Transmission Electron Microscopies (TEM) were used to determine the characteristics of the nanomaterials synthesized. The results showed that the samples obtained were of nanometric size (< 100 nm). To compare their antifungal capacity, their effect on Cercospora sp. was evaluated. Test results showed that both nanomaterials had an antifungal capacity. The nanobiohybrids (green route) gave an inhibition of fungal growth of ~72.4% while with the ZnO-NPs (chemical route), inhibition was ~87.1%. Microstructural studies using High Resolution Optical Microscopy (HROM) and ultra-structural analysis using TEM carried out on the treated strains demonstrated the effect of the nanofungicides on the vegetative and reproductive structures, as well as on their cell wall. To account for the antifungal effect presented by ZnO-NPs and ZnO nanobiohybrids on the fungi tested, effects reported in the literature related to the action of nanomaterials on biological entities were considered. Specifically, we discuss the electrical interaction of the ZnO-NPs with the cell membrane and the biomolecules (proteins) present in the fungi, taking into account the n-type nature of the ZnO semiconductor and the electrical behavior of the fungal cell membrane and that of the proteins that make up the protein crown.
Galecio-Castillo Milagros,Farooqui Mudassir,Hassan Ameer E.,Jumaa Mouhammad A.,Divani Afshin A.,Ribo Marc,Abraham Michael,Petersen Nils H.,Fifi Johanna T.,Guerrero Waldo R.,Malik Amer M.,Siegler James 대한뇌졸중학회 2023 Journal of stroke Vol.25 No.3
Background and Purpose Effect of endovascular therapy (EVT) in acute large vessel occlusion (LVO) patients with tandem lesions (TLs) within 6–24 hours after last known well (LKW) remains unclear. We evaluated the clinical and safety outcomes among TL-LVO patients treated within 6–24 hours. Methods This multicenter cohort was divided into two groups, based on LKW to puncture time: early window (<6 hours), and late window (6–24 hours). Primary clinical and safety outcomes were 90-day functional independence measured by the modified Rankin Scale (mRS: 0–2) and symptomatic intracranial hemorrhage (sICH). Secondary outcomes were successful reperfusion (modified Thrombolysis in Cerebral Infarction score ≥2b), first-pass effect, early neurological improvement, ordinal mRS, and in-hospital and 90-day mortality. Results Of 579 patients (median age 68, 32.1% females), 268 (46.3%) were treated in the late window and 311 (53.7%) in the early window. Late window group had lower median National Institutes of Health Stroke Scale score at admission, Alberta Stroke Program Early Computed Tomography Score, rates of intravenous thrombolysis, and higher rates for perfusion imaging. After adjusting for confounders, the odds of 90-day mRS 0–2 (47.7% vs. 45.0%, adjusted odds ratio [aOR] 0.71, 95% confidence interval [CI] 0.49–1.02), favorable shift in mRS (aOR 0.88, 95% CI 0.44–1.76), and sICH (3.7% vs. 5.2%, aOR 0.56, 95% CI 0.20–1.56) were similar in both groups. There was no difference in secondary outcomes. Increased time from LKW to puncture did not predicted the probability of 90-day mRS 0–2 (aOR 0.99, 95% CI 0.96–1.01, for each hour delay) among patients presenting <24 hours. Conclusion EVT for acute TL-LVO treated within 6–24 hours after LKW was associated with similar rates of clinical and safety outcomes, compared to patients treated within 6 hours.
Effects of Candida norvegensis Live Cells on In vitro Oat Straw Rumen Fermentation
Ruiz, Oscar,Castillo, Yamicela,Arzola, Claudio,Burrola, Eduviges,Salinas, Jaime,Corral, Agustin,Hume, Michael E.,Murillo, Manuel,Itza, Mateo Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.2
This study evaluated the effect of Candida norvegensis (C. norvegensis) viable yeast culture on in vitro ruminal fermentation of oat straw. Ruminal fluid was mixed with buffer solution (1:2) and anaerobically incubated with or without yeast at $39^{\circ}C$ for 0, 4, 8, 16, and 24 h. A fully randomized design was used. There was a decrease in lactic acid (quadratic, p = 0.01), pH, (quadratic, p = 0.02), and yeasts counts (linear, p<0.01) across fermentation times. However, in vitro dry matter disappearance (IVDMD) and ammonia-N increased across fermentation times (quadratic; p<0.01 and p<0.02, respectively). Addition of yeast cells caused a decrease in pH values compared over all fermentation times (p<0.01), and lactic acid decreased at 12 h (p = 0.05). Meanwhile, yeast counts increased (p = 0.01) at 12 h. C. norvegensis increased ammonia-N at 4, 8, 12, and 24 h (p<0.01), and IVDMD of oat straw increased at 8, 12, and 24 h (p<0.01) of fermentation. Yeast cells increased acetate (p<0.01), propionate (p<0.03), and butyrate (p<0.03) at 8 h, while valeriate and isovaleriate increased at 8, 12, and 24 h (p<0.01). The yeast did not affect cellulolytic bacteria (p = 0.05), but cellulolytic fungi increased at 4 and 8 h (p<0.01), whereas production of methane decreased (p<0.01) at 8 h. It is concluded that addition of C. norvegensis to in vitro oat straw fermentation increased ruminal fermentation parameters as well as microbial growth with reduction of methane production. Additionally, yeast inoculum also improved IVDMD.
Kinematic and deformation analyses of a translational parallel robot for drilling tasks
R. Maldonado-Echegoyen,E. Castillo-Castaneda,M. A. Garcia-Murillo 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.10
A 3DOF translational parallel robot for drilling tasks based on two 5-bar mechanisms with a large workspace is presented in this study. The position analysis is performed by applying simple geometric procedures, and the velocity and acceleration analyses are developedusing the theory of screws. A numerical example is included in the contribution to validate the equations of the kinematic analysis, anddeformation analysis is performed to assess the accuracy considering the forces reported in the literature for drilling process. A prototypeis presented, and an experimental test is performed to validate accuracy using a circular test.
Understanding and Using Early Learning Standards for Young Children Globally
Sharon Lynn Kagan,Elise Castillo,Rebecca E. Gomez,Saima Gowani 육아정책연구소 2013 International Journal of Child Care and Education Vol.7 No.2
Around the world, there is an increasing focus on the importance of the early years, with growing numbers of countries specifying early learning and development standards. The authors find that differences in country context and pre-primary service delivery influence the content and use of standards documents. Generally, within their documents, countries favor either specifying precise indicators of what children should know and be able to do, or including many elements that guide early education more broadly, such as broad learning goals for children and pedagogical guidance for teachers. Although the standards’ documents vary, countries generally use their documents for the purposes of curriculum development, professional development, parent engagement, and national monitoring and evaluation. By using the standards for multiple purposes, early education is better aligned and countries are advancing the integration of their services. Standards have made numerous positive contributions to the early childhood field, but, lacking rigorous outcome evaluations, it is too early to discern the effect of standards on children’s performance and learning. The authors recommend that countries devote greater attention to developing their early childhood infrastructure so that the standards documents are more effectively understood, utilized, and evaluated.
N.A. Medellin-Castillo,R. Leyva-Ramos,E. Padilla-Ortega,R. Ocampo Perez,J.V. Flores-Cano,M.S. Berber-Mendoza 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
The adsorption of fluoride from water on bone char (BC) was investigated in this work, and the fluorideadsorption capacity of BC was compared to that of hydroxyapatite (HAP). The adsorption capacity of BCand HAP drastically increased while decreasing the pH from 7.0 to 5.0. Furthermore, the fluorideadsorption on BC was due to its HAP content and was not considerably affected by the presence of theanions Cl-, HCO3-, CO32-, SO42-, NO3- and NO2-. The mechanism of fluoride adsorption on BC wasattributed to electrostatic interactions between surface charge of BC and fluoride ions in solution.