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Gastroenteritis in an adult female revealing hemolytic uremic syndrome: case report

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World Journal of Gastroenterology 2018年第6期24卷 763-766页

作者： Paulina Chinchilla-López Vania Cruz-Ramón oscar Ramírez-Pérez nahum Méndez-Sánchez Liver Research Unit Medica Sur Clinic and Foundation

nowadays acute gastroenteritis infection caused by Escherichia coli(E. coli) O157:H7 is frequently associated with hemolytic uremic syndrome(HUS), which usually developed after prodromal diarrhea that is often bloody. The abdominal pain accompanied by failure kidney is a suspicious symptom to develop this disorder. Their pathological characteristic is vascular damage which manifested as arteriolar and capillary thrombosis with abnormalities in the endothelium and vessel walls. The major etiological agent of HUS is enterohemorragic(E coli) strain belonging to serotype O157:H7. The lack of papers about HUS associated to gastroenteritis lead us to report this case for explain the symptoms that are uncommon. Furthermore, this report provides some strategies to suspect and make an early diagnosis, besides treatment approach to improving outcomes and prognosis for patients with this disorder.

关键词： Gastroenteritis Gastrointestinal hemorrhage Hemolytic-uremic syndrome Escherichia coli O157 Shiga-toxigenic Escherichia coli

Tidal drag and westward drift of the lithosphere

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Geoscience Frontiers 2023年第6期14卷 102-116页

作者： Vincenzo nesi oscar Bruno Davide Zaccagnino Corrado Mascia Carlo Doglioni Dipartimento di Matematica Guido Castelnuovo Piazzale Aldo Moro5Roma 00185Italy Istituto nazionale di Geofisica e Vulcanologia Via di Vigna Murata605Roma 00143Italy Computing and Mathematical Sciences Department Caltech1200 E.California Blvd.MC 305-16Pasadena 91125CAUSA Dipartimento di Scienze della Terra Piazzale Aldo Moro5Roma 00185Italy

Tidal forces are generally neglected in the discussion about the mechanisms driving plate tectonics despite a worldwide geodynamic asymmetry also observed at subduction and rift *** tidal drag could theoretically explain the westerly shift of the lithosphere relative to the underlying ***,viscosity in the asthenosphere is apparently too high to allow mechanical decoupling produced by tidal ***,we propose a model for global scale geodynamics accompanied by numerical simulations of the tidal interaction of the Earth with the Moon and the *** provide for the first time a theoretical proof that the tidal drag can produce a westerly motion of the lithosphere,also compatible with the slowing of the Earth’s rotational *** results suggest a westerly rotation of the lithosphere with a lower bound ofω≈(0.1-0.2)°/Myr in the presence of a basal effective shear viscosityη≈10^(16)Pa-s,but it may rise toω>1°/Myr with a viscosity ofη≈≤3×10^(14)Pa-s within the Low-Velocity Zone(LVZ)atop the *** faster velocity would be more compatible with the mainstream of plate motion and the global asymmetry at plate *** on these computations,we suggest that the super-adiabatic asthenosphere,being vigorously convecting,may further reduce the viscous coupling within the LVZ Therefore,the combination of solid Earth tides,ultra-low viscosity LVZ and asthenospheric polarized small-scale convection may mechanically satisfy the large-scale decoupling of the lithosphere relative to the underlying *** plate motions are explained because of lateral viscosity heterogeneities at the base of the lithosphere,which determine variable lithosphere-asthenosphere decoupling and plate interactions,hence plate tectonics.

关键词： Tidal drag Plate motions Polarized plate tectonics Lithosphere-asthenosphere interaction

Feeding of yeast(Candida spp.) improves in vitro ruminal fermentation of fibrous substrates

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Journal of Integrative Agriculture 2015年第3期14卷 514-519页

作者： Yoandra Marrero Yamicela Castillo oscar Ruiz Eduviges Burrola Claudio Angulo Department of Physiology Animal Science Institute Multidisciplinary Division Autonomous University of Juárez Faculty of Animal Science and Ecology Autonomous University of Chihuahua

In vitro gas production technique（IVGPT） was used with the objective of determining the inclusion effect of live cells of two strains of Candida yeast on in vitro ruminal fermentation of two fibrous substrates. In order to achieve this, two experiments were performed： A） using oat straw（Avena sativa） as substrate; B） using alfalfa hay（Medicabo sativa） as substrate, comparing the effect of two different strains of Candida genre, both isolated from the rumen, on the mentioned substrates. Levica 25（Candida tropicalis） yeast belongs to the culture collection of the Institute of Animal Science, Cuba, and Levazoot 15（Candida norvegensis） yeast is part of the collection of the Faculty of Zootechnology and Ecology of the Autonomous University of Chihuahua, Mexico. Both strains demonstrated their potential in activating the ruminal fermentation. They stimulated（P〈0.0001） the ruminal fermentation of the substrates under study. However, the Levazoot strain stimulated the dry matter（DM） fermentation of alfalfa in 21.43%, more than Levica 25. It is concluded that there is an influence of yeast strain and diet on the rumen environment and, therefore, it is important to select the appropriate strain in every production condition.

关键词： rumen yeast gas production fermentation product microbial additive

Protein Shuttle between nucleus and Cytoplasm:new Paradigms in the ABI5-dependent ABA Responses

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Molecular Plant 2019年第11期12卷 1425-1427页

作者： Inmaculada Sanchez-Vicente Pablo Albertos oscar Lorenzo Dpto.de Botanica y Fisiologia Vegetal Instituto Hispano-Luso de Investigaciones Agrarias(CIALE)Facultad de BiologiaUniversidad de SalamancaC/Rio Duero 1237185 SalamancaSpain Present address:Biotechnology in Horticultural Crops TU Munchen-WeihenstephanLiesel-Beckmann-Strasse 185354 FreisingGermany

Plant survival depends on seed germination,progression through post-germinative developmental checkpoints,and adaptation to abiotic *** these processes underlie a tightly controlled regulation by the stress hormone abscisic acid(ABA)at different levels,even though the main research focuses on changes in transcript and protein ***,protein fate undergoes complex readjustments that allow signal transduction to be integrated into physiological *** them,protein redox status,stability,capacity of oligomerization,formation of complexes,and subcellular compartmentalization become key points for plant reprogramming against stresses to acquire an optimal *** this Spotlight,we highlight and discuss the latest advances in dissecting the mechanisms driving protein dynamics of nucleocytoplasmic trafficking in the cell and its relevance for regulating the stability of ABI5 and the ABI5-dependent AB A signaling pathway(Figure 1).

关键词： Figure driving programming

Morphological and productivity responses of Buffel grass(Cenchrus ciliaris)and Guinea grass(Panicum maximum)ecotypes to simulated grazing in a semi-arid environment

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Grassland Research 2022年第4期1卷 290-300页

作者： Bosco Kidake Kisambo Oliver V.Wasonga oscar K.Koech George n.Karuku Department of Land Resources Management and Agricultural Technology University of NairobiNairobiKenya Arid and Range Lands Research Institute—Kiboko Kenya Agricultural and Livestock Research Organization(KALRO)NairobiKenya

Background Livestock production is an economically significant activity in grassland-based production systems with herbivory,a critical process in modifying plant structure and regulating biomass dynamics in these *** A grazing simulation experiment was undertaken in a semi-arid environment in Kenya to determine the effects of clipping frequency and intensity on the morphology and productivity of Cenchrus ciliaris and Panicum maximum grass *** ecotypes were clipped at different frequencies(every 2,4,and 12 weeks)and different intensities(5,10,and 15 cm clipping heights).The morphological responses of the grass ecotypes and biomass yields were *** The grass ecotypes showed significantly(pnses to cutting frequency and *** parameters,tillering,and biomass production were all affected by clipping frequency and *** highest dry matter(DM)yields were recorded under low frequency(LF)clipping,followed by moderate frequency(MF)clipping and high frequency(HF)*** clipping in *** ecotype Kilifi was 20%and 31%more compared to MF and HF *** significant difference in yields was found by cutting the *** ecotype Magadi at 4-and 12-week intervals,even though clipping at 2-week intervals cumulatively yielded less *** was a biomass yield reduction in *** ecotype Taveta of 23%and 25%for MF and HF clipping,respectively,while for ecotype Isinya,the reduction was 13%and 15%for MF and HF,*** intensity had a significant(pn cumulative yields in *** ecotypes,but not *** differences were apparent in both *** and *** ecotype DM *** The results in this study suggest that clipping range grass ecotypes less frequently(4-and 12-week intervals)and at 10 and 15 cm stubble heights results in higher biomass ***,LF and MF grazing and cutting strategies are advantageous for semi-arid lan

关键词： dry matter dryland grasslands grazing grazing frequency grazing intensity pastures rehabilitation

Superplasticity of a friction stir processed overaged WE54 magnesium alloy

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Journal of Magnesium and Alloys 2022年第11期10卷 3156-3166页

作者： oscar A.Ruano Marta Alvarez-Leal Alberto Orozco-Caballero Fernando Carreño Physical Metallurgy Department CENIM-CSICAv.Gregorio del Amo 828040 MadridSpain Department of R&D and programmes Technology Centre of Metal-Mechanical and Transport(CETEMET).Avda.1°de Mayos/n.LinaresJaén2370Spain Department of Mechanical Engineering Chemistry and Industrial DesignPolytechnic University of MadridRonda de Valencia 328012MadridSpain

The coarse-grained WE54 magnesium alloy was heat treated in order to have minimum hardness minimizing the effects of precipitates and solid solution. Friction stir processing(FSP) was applied in severe conditions to obtain fine, equiaxed and highly misoriented grains, with grain sizes even less than 1 μm. The high severity of processing demonstrated to have a strong impact in the microstructure. Consequently,the processed materials exhibited excellent superplasticity at the high strain rate 10^(-2)s^(-1), and temperatures between 300 and 400 ℃. The maximum tensile superplastic elongation of 756% was achieved at 400 ℃ thanks to the operation of grain boundary sliding mechanism(GBS). Besides the new data obtained through tensile testing, the paper deals with a transcendental question regarding the large differences in strain rate values at a given stress in the superplastic regime at maximum elongation compared to other magnesium-based alloys. With this is mind, 19 magnesium alloys from 22 different investigations were analyzed to give some light to this behavior that never was treated before. It is proposed that this behavior has to be attributed to the accommodation process, necessary for GBS to occur, which is hindered by reinforcing solutes.

关键词： WE54 magnesium alloy Friction stir processing Processing severity Superplasticity Grain boundary sliding Solutes

Spinal cord injury-induced cognitive impairment: a narrative review

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neural Regeneration Research 2022年第12期17卷 2649-2654页

作者： oscar V.Alcántar-Garibay Diego Incontri-Abraham Antonio Ibarra Centro de Investigación en Ciencias de la Salud(CICSA) Facultad de Ciencias de la SaludUniversidad Anáhuac México Campus NorteHuixquilucanEstado de MéxicoMéxico

Spinal cord injury is a serious damage to the spinal cord that can lead to life-long *** on its etiology,spinal cord injury can be classified as traumatic or non-traumatic spinal cord ***,the pathology of spinal cord injury can be divided into two phases,a primary injury phase,and a secondary injury *** primary spinal cord injury phase involves the initial mechanical injury in which the physical force of impact is directly imparted to the spinal cord,disrupting blood vessels,axons,and neural cell *** the primary injury,a cascade of secondary events begins,expanding the zone of neural tissue damage,and exacerbating neurological *** injury is a progressive condition characterized by pro-inflammatory cytokines,reactive oxygen species,oxidative damage,excitatory amino acids such as glutamate,loss of ionic homeostasis,mitochondrial dysfunction,and cell *** secondary phase lasts for several weeks or months and can be further subdivided into acute,subacute,and *** of the most frequent and devastating complications developed among the spinal cord injury population is cognitive *** risk of cognitive decline after spinal cord injury has been reported to be 13 times higher than in healthy *** exact etiology of this neurological complication remains unclear,however,many factors have been proposed as potential contributors to the development of this disorder,such as concomitant traumatic brain injury,hypoxia,anoxia,autonomic dysfunction,sleep disorders such as obstructive sleep apnea,body temperature dysregulation,alcohol abuse,and certain *** review focuses on a deep understanding of the pathophysiology of spinal cord injury and its relationship to cognitive *** highlight the main mechanisms that lead to the development of this neurological complication in patients with spinal cord injury.

关键词： autonomic dysfunction cognitive impairment spinal cord injury traumatic brain injury

nightlife in the city: drivers of the occurrence and vocal activity of a tropical owl

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Avian Research 2020年第2期11卷 92-105页

作者： oscar Humberto Marín‑Gómez Michelle García‑Arroyo Camilo ESánchez‑Sarria JRoberto Sosa‑López Diego Santiago‑Alarcon Ian MacGregor‑Fors Red de Ambiente y Sustentabilidad Instituto de Ecología A.C.Carretera antigua a Coatepec 351El Haya91073 XalapaVeracruzMexico Departamento de Ciencias naturales y Matemáticas Pontificia Universidad Javeriana Cali760044 CaliColombia Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Oaxaca(CIIDIR) Instituto Politécnico NacionalOaxacaMexico Dirección de Cátedras Consejo Nacional de Ciencia y Tecnología(CONACYT)Mexico CityMexico Red de Biología y Conservación de Vertebrados Instituto de Ecología A.C91073 XalapaVeracruzMexico

Background:Cities differ from non-urban environments by the intensity,scale,and extent of anthropogenic pres-sures,which can drive the occurrence,physiology,and behavior of the organisms thriving in these *** as green cover often predict the occurrence patterns of bird species in urban ***,anthropogenic noise and artificial light at night(ALAn)could also limit the presence and disrupt the behavior of ***,there is still a dearth of knowledge about the influence of urbanization through noise and light pollution on nocturnal bird species *** this study,we assessed the role of green cover,noise,and light pollution on the occurrence and vocal activity of the Mottled Owl(Ciccaba virgata)in the city of Xalapa(Mexico).Methods:We obtained soundscape recordings in 61 independent sites scattered across the city of Xalapa using autonomous recording *** performed a semi-automated acoustic analysis of the recordings,corroborating all Mottled Owl *** calculated two measures of anthropogenic noise at each study site:daily noise(during 24 h)and masking noise(mean noise amplitude at night per site that could mask the owl’s vocalizations).We further performed generalized linear models to relate green cover,ALAn,daily noise,and masking noise in relation to the owl’s occurrence(i.e.,detected,undetected).We also ran linear models to assess relationships among the beginning and ending of vocal activity with ALAn,and with the anthropogenic and masking noise levels at the moment of which vocalizations were ***,we explored variations of the vocal activity of the Mottled Owl measured as vocalization rate across ***:The presence of Mottled Owls increased with the size of green cover and decreased with increases in both artificial light at night and noise *** the temporal scale,green cover was positively related with the ending of the owl’s vocal activity,while daily noise and ALAn levels were not related to the tim

关键词： Anthropogenic noise Acoustic monitoring nighttime ecology Urban ecology Urbanization Vocal activity

Subacute osteomyelitis due to Staphylococcus caprae in a teenager:A case report and review of the literature

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World Journal of Clinical Cases 2023年第20期11卷 4897-4902页

作者： oscar Vazquez Giacomo De Marco nathaly Gavira Celine Habre Marcia Bartucz Christina n Steiger Romain Dayer Dimitri Ceroni Paediatric Orthopaedics Unit Geneva Children’s HospitalGeneva University HospitalsGeneva 1211Switzerland Paediatric Radiology Unit Geneva Children’s HospitalGeneva University HospitalsGeneva 1211Switzerland

BACKGROUnD Staphylococcus caprae(***)is a human commensal bacterium which can be detected in the nose,nails,and *** can be responsible for heterogeneous infections such as bacteremia,endocarditis,pneumonia,acute otitis externa,peritonitis,and urinary tract *** and joint infections due to *** have also been reported,but most of them resulted from the infection of orthopedic devices,especially joint prostheses and internal osteosynthesis *** cases of primary osteoarticular infections caused by *** have been described,including osteitis,arthritis,or *** SUMMARY We report an unusual case of subacute osteomyelitis in a toe phalanx caused by *** in a 14.5-year-old *** Subacute *** osteomyelitis is a little-known and probably underestimated community-acquired infectious *** microorganism’s pathogenicity should be seen as more than a classic nosocomial orthopedic device infection.

关键词： Subacute Osteomyelitis Staphylococcus caprae Teenagers Case report