643 research outputs found
Coulomb-driven flow of a dielectric liquid subject to charge injection by a sharp electrode
Injection of charge by a sharp electrode into a surrounding dielectric liquid leads to Coulomb forces
that set the liquid into motion. An analysis is presented of this motion in a small region around the
edge of the electrode, which determines the injected current as a function of the far electric potential
seen by this region. By using an injection law appropriate for nonpolar liquids, the analysis predicts
an electric current that increases first exponentially and then as the power 7
3 of the harmonic part of
the electric potential, sometimes with a range of multiplicity in betweenMinisterio de Ciencia e Innovación PB95-0008
Generalising Exponential Distributions Using an Extended Marshall-Olkin Procedure
This paper presents a three-parameter family of distributions which includes the common
exponential and the Marshall–Olkin exponential as special cases. This distribution exhibits a
monotone failure rate function, which makes it appealing for practitioners interested in reliability,
and means it can be included in the catalogue of appropriate non-symmetric distributions to
model these issues, such as the gamma and Weibull three-parameter families. Given the lack of
symmetry of this kind of distribution, various statistical and reliability properties of this model are
examined. Numerical examples based on real data reflect the suitable behaviour of this distribution
for modelling purposes
Academic freedom or unification of terminology and concepts. Example related to the coat and equine passport
Resúmenes IV Congreso VetDoc de Docencia Veterinaria, León 2017 (6-7 de Julio)[ES] Según la legislación vigente, es el veterinario el garante de los procedimientos de identificación equina. Siendo la capa uno de los rasgos a considerar. Existe una notable confusión en su definición y clasificación. Así, por ejemplo, su número según Medlej (2016) es de 128, 22 para Registro General de Identificación Individual Animal, o 6 según el Léxico Internacional. Su armonización debe empezar en las facultades, más tarde pierde sentido
Contagious statistical distributions: k-connections and applications in infectious disease environments.
Contagious statistical distributions are a valuable resource for managing contagion by
means of k–connected chains of distributions. Binomial, hypergeometric, Po´ lya, uniform distributions
with the same values for all parameters except sample size n are known to be
strongly associated. This paper describes how the relationship can be obtained via factorial
moments, simplifying the process by including novel elements. We describe the properties
of these distributions and provide examples of their real–world application, and then define
a chain of k–connected distributions, which generalises the relationship among samples of
any size for a given population and the Po´lya urn model
Practical considerations for clinical use of mesenchymal stem cells: From the laboratory to the horse
Since the clinical use of mesenchymal stem cells (MSCs) for treating musculoskeletal injuries is gaining popularity, practitioners should be aware of the factors that may affect MSCs from tissue harvesting for MSC isolation to cell delivery into the injury site. This review provides equine practitioners with up-to-date, practical knowledge for the treatment of equine patients using MSCs. A brief overview of laboratory procedures affecting MSCs is provided, but the main focus is on shipping conditions, routes of administration, injection methods, and which commonly used products can be combined with MSCs and which products should be avoided as they have deleterious effects on cells. There are still several knowledge gaps regarding MSC-based therapies in horses. Therefore, it is important to properly manage the factors which are currently known to affect MSCs, to further strengthen the evidence basis of this treatment
MS-222 toxicity in juvenile seabream correlates with diurnal activity, as measured by a novel video-tracking method
©2010. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This document is the Accepted version of a Published Work that appeared in final form in Aquaculture. To access the final edited and published work see
https://doi.org/10.1016/j.aquaculture.2010.06.028Fish are frequently exposed to anaesthetics since their use is necessary in several
aquaculture procedures. The aim of this study was to investigate the existence of day night differences in toxicity and effectiveness of a common fish anaesthetic (MS-222)
in juvenile gilthead seabream (Sparus aurata), determining the induction time of
anaesthesia and subsequent recovery by a novel video-recording system. Our results
showed that MS-222 toxicity was significantly higher at ML (mid-light) (LC50=85.5
mg/L) than at MD (mid-darkness) (LC50=107.6 mg/L) (trimmed Spearman-Karber
method). In addition, when fish were exposed to a sublethal but effective MS-222
concentration (65 mg/L), 7 min passed before 50% a reduction in swimming activity
was observed at ML compared to the 9 min required at MD. As regards recovery, fish
showed activity levels similar to basal levels 10 min after MS-222 removal at ML, but
only 6 min at MD. These results indicated that both toxicity and effectiveness were
higher during the day than at night, coinciding with the diurnal activity pattern
displayed by seabream, which should be taken into account when designing and
applying daily protocols for anaesthesia in aquacultur
New analytical method for determination of phthalates in wastewater by on line lc-gc-ms using the totad interface and fraction collector
There is an increasing demand for automatic, reliable and sensitive analytical methods for determining trace levels of phthalic acid esters (PAEs) in environmental samples. While on line coupled liquid chromatography-gas chromatography (LC-GC) has been proof to be a powerful tool for trace-level analyses in complex matrices, the present work presents a new totally automated on line LC-GC method, using the Through Oven Transfer Adsorption Desorption (TOTAD) interface, for the analysis of four of the main phthalates, dibuthyl phthalate (DBP), diethyl phthalate (DEP), dimethyl phthalate (DMP) and diethylhexyl phthalate (DEHP), in a matrix as complex as leachate. The sample is directly injected into the LC injector valve with no sample pretreatment other than simple filtration. The LC step separates the target analytes from matrix interference. Two different LC fractions are collected in a purposely designed fraction collector and then transferred to the TOTAD interface, which concentrates the analytes, totally eliminates the solvent and transfers the analytes to the GC-MS system, where the analysis is carried out. The LOD of the method varied from 0.1 µg/L (DEHP) to 1.4 µg/L (DMP), RSD for retention time below 0.14% and for absolute peak areas below 12% and linearity from 1 µg/L to 1000 µg/L (R2 > 0.99), except in the case of DEHP (linearity from 1 to 250 µg/L, R2 = 0.94). The method was applied to the analysis of the target analytes in samples collected from a municipal solid waste (MSW) landfill in Rosario (Argentina).Fil: Espinosa, F.J.. Universidad de Castilla-La Mancha; EspañaFil: Toledano, R.M.. Universidad de Castilla-La Mancha; EspañaFil: Andini, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Cortés, J.M.. Universidad de Castilla-La Mancha; EspañaFil: Vázquez, A.M.. Universidad de Castilla-La Mancha; Españ
Extrusión del componente plástico de la copa acetabular sin luxación protésica: a propósito de un caso
Se present a un caso de extrusión del component e plástic o (polietileno)
ocurrido en el transcurso del primer me s del postoperatorio en un pacient e que había
sufrido un recambio del component e acetabular. Se destaca el hecho de que cursase de
forma asintomática y de que no se acompañase de luxación de la prótesis.A case of disassembly of the polyethylene component of the acetabular
cup acurred in a patient one mouth after revision surgery for loosening of a screwed
acetabular cup is reported. Special emphasis is made in the asyntomati c clinic and on
the no association with dislocation of the femoral component
- …