1,721,362 research outputs found
Gaining insights in renal magnesium handling
No full textContains fulltext :
19118.pdf (Publisher’s version ) (Open Access)128 p
CIL:19118
No full textConfocal laser scanning micrograph of immunofluorescence-labeled corn stunt spiroplasma (CSS, Spiroplasma kunkelii, Class Mollicutes) aggregates (green) in whole mount preparations of its leafhopper vector D. maidis, showing the anterior and posterior midgut (amg and pmg). Whole-mount organs were labeled with primary CSS antibodies then with secondary antibodies (Alexa Fluor-488, green), and stained with the nuclear stain propidium iodide (red). CIL:12580, from the same image group, is an uncropped unlabeled version of this image. CSS is a wall-less procaryote that causes corn stunt disease and is biologically transmitted by some leafhopper species, e.g. Dalbulus maidis and D. gelbus (Hemiptera, Cicadellidae). Spiroplasma cells are limited by a unit membrane with no cell wall. They can be quasi-spherical, pleiomorphic or maintain a filamentous/spiral form. CSS multiplies in both plant and insect hosts and is transmitted with salivary secretions during feeding of the vector on new host plants. For additional information refer to Ammar and Hougenhout(2005)
Ann. Entomol. Soc. Am. 98(6): 820Ð826
Efecto Antibacteriano del Extracto Etanólico de las hojas de Psidium guajava L. sobre Listeria monocytogenes ATCC 19118 comparado con Ampicilina
Get PDFSe realizó un estudio experimental in vitro con el objetivo de evaluar el efecto antibacteriano del extracto etanólico de las hojas de Psidium guajava L sobre cepas de Listeria monocytogenes ATCC 19118 comparado con ampicilina a 10 µg, en un estudio in vitro. Se realizaron 4 diluciones del extracto (al 100%, 75%, 50%, 25%) y un control negativo con agua destilada (DMSO). Los resultados muestran que no se obtuvieron halos de inhibición a las diferentes concentraciones del extracto etanólico de las hojas de Psidium guajava L sobre cepas de Listeria monocytogenes ATCC 19118, y ampicilina mostró un halo de inhibición de 30,70 mm (DS: 1.3mm, IC 95%: 29.74 - 31.66). Según ANOVA los resultados del estudio fueron altamente significativos (p = 0.000). Así mismo la prueba post ANOVA de TUKEY analizó la homogeneidad de grupos, demostró que la Listeria Monocytogenes no era sensible al extracto etanólico de las hojas de Psidium guajava L. pero si fue sensible para ampicilina (según CLSI≥ 17mm). Por lo que se concluye que el extracto etanólico de las hojas de Psidium guajava L no tiene efecto antibacteriano sobre cepas de Listeria monocytogenes ATCC 19118
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Determinación de la bioconservación de quesos frescos de Metapán, utilizando una cepa probiótica Lactobacillus rhamnosus HOWARU™ frente a listeria monocytogenes ATCC 19118
No full textTuvo como objetivo determinar la Bioconservación de queso frescos de Metapán utilizando una cepa probiótica Lactobacillus rhamnosus HOWARU™ frente a Listeria monocytogenes ATCC 19118. Así como la verificación de las Buenas Prácticas de Higiene mediante una lista de chequeo. Se estableció la calidad microbiológica inicial de los quesos frescos según los Criterios microbilógicos del Reglamento Técnico Centroamericano (RTCA 67.04.50:08) para el 1.0 Grupo de alimento: Leche y productos lácteos; 1.9 Subgrupo del alimento: Quesos frescos, no madurados y requesón los cuales fueron Listeria monocytogenes, Staphylococcus aureus, Escherichia coli y Salmonella spp. Posteriormente se inocularon en los quesos frescos las cepas estandarizadas a concentraciones de Lactobacillus rhamnosus HOWARU™ 106 y 107 UFC/g y Listeria monocytogenes ATCC 19118 103 y 105 UFC/g comprobando su sobrevivencia a los 0, 3, 5, 8 y 15 días, simultáneamente se determinó el pH, color, olor y mejor tiempo de vida en anaquel de los quesos frescos comparando sus características con un queso patrón.
Se realizaron dos ensayos de Bioconservación, utilizando cinco muestras de quesos frescos para cada uno, determinados en el Laboratorio de Microbiología de Alimentos del Centro de Investigación y Desarrollo en Salud (CENSALUD) en el período de agosto a noviembre de 2016. En el primer ensayo la bacteria Listeria monocytogenes ATCC 19118 disminuyo seis logaritmos desde su concentración inicial hasta el día tres manteniéndose en este mismo logaritmo hasta el día quince, Lactobacillus rhamnosus HOWARU™ aumenta cuatro logaritmos hasta el día quince obteniéndose una mejoría en las características organolépticas de las muestras, mientras que en el segundo ensayo Listeria monocytogenes ATCC 19118 mantuvo su mismo logaritmo y Lactobacillus rhamnosus HOWARU™ aumento dos hasta el día quince
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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