Triazine Resistant Pigweeds in Kentucky Corn Fields

Smooth pigweed (Amaranthus hybridus) control from atrazine and/or simazine (Princep) has been unsatisfactory in some Kentucky corn fields. Many of these fields have grown corn where one or both of these herbicides have been used continuously for several years. These two triazine herbicides, particularly atrazine, are used annually on over 90% of the corn grown in Kentucky. Other areas in the U.S. and around the world have reported. unsatisfactory control from atrazine where triazine resistant pigweed has developed

Gender Differences in Performance Predictions: Evidence from the Cognitive Reflection Test

This paper studies performance predictions in the 7-item Cognitive Reflection Test (CRT) and whether they differ by gender. After participants completed the CRT, they predicted their own (i), the other participants' (ii), men's (iii), and women's (iv) number of correct answers. In keeping with existing literature, men scored higher on the CRT than women and both men and women were too optimistic about their own performance. When we compare gender-specific predictions, we observe that men think they perform significantly better than other men and do so significantly more than women. The equality between women's predictions about their own performance and their female peers cannot be rejected. Our findings contribute to the growing literature on the underpinnings of behavior in economics and in psychology by uncovering gender differences in confidence about one's ability relative to same and opposite sex peers

Ejercicios para desarrollar la fuerza explosiva en la selección de levantamiento de pesas en la ESPOL

Lifting weights is one of the oldest sports disciplines. Its origins are around the year 3600 before Christ in China, since it was the Chinese emperors who began to practice this exercise of strength. In its execution the conditional and coordinative physical capacities are shown, within them the strength is that the research presented aims to develop a methodological alternative to develop the explosive force that allows to improve the levels of physical preparation in the selection of weightlifting in the Polytechnic School of the Litoral, for its fulfillment empirical and theoretical level methods were used to collect, process and interpret the necessary data. The procedure used, according to the nature of the variables involved in the study, allowed accepting the statistical significance in the changes produced by the influence of the alternative methodological variable at a level of 95%, the conclusions express the main concrete results obtained.El levantamiento de pesas es una de las disciplinas deportivas más antiguas. Sus orígenes se sitúan en torno al año 3600 antes de Cristo en China, ya que fueron los emperadores chinos quienes comenzaron a practicar este ejercicio de fuerza. En su ejecución se ponen de manifiesto las capacidades físicas condicionales y coordinativas, dentro de ellas la fuerza es por ello que la investigación que se presenta tiene por objetivo elaborar una alternativa metodológica para desarrollar la fuerza explosiva que permita mejorar los niveles de preparación física en la selección de levantamiento de pesas en la Escuela Superior Politécnica del Litoral, para su cumplimiento se utilizaron métodos del nivel empírico y teóricos para recopilar, procesar e interpretar los datos necesarios. El procedimiento utilizado, de acuerdo con la naturaleza de las variables implicadas en el estudio, permitió aceptar la significación estadística en los cambios producidos por la influencia de la variable alternativa metodológica a un nivel del 95%, las conclusiones expresan los principales resultados concretos obtenido

Cecal Microbiome Characterization for Layers underHeat Stress

Animal microbiomeshavegainedattentionin recent years because oftheirrolesin avariety of physiological responses to disease and environment challenges. In this study, we subjected production white egg layers to a 4-week heatstress challenge to measure changes in the cecal microbiome. We found that heat stress altersthe cecal microbial compositionafter 2 weeks of cyclic heat exposure. To our knowledge, this is the first study to demonstrate changes in microbiome in heat-stressed layers, and provides an approximatetime course for the microbiome alterations

INTEGRAL high energy monitoring of the X-ray burster KS 1741-293

KS 1741-293, discovered in 1989 by the X-ray camera TTM in the Kvant module of the Mir space station and identified as an X-ray burster, has not been detected in the hard X band until the advent of the INTEGRAL observatory. Moreover this source has been recently object of scientific discussion, being also associated to a nearby extended radio source that in principle could be the supernova remnant produced by the accretion induced collapse in the binary system. Our long term monitoring with INTEGRAL, covering the period from February 2003 to May 2005, confirms that KS 1741-293 is transient in soft and hard X band. When the source is active, from a simultaneous JEM-X and IBIS data analysis, we provide a wide band spectrum from 5 to 100 keV, that can be fit by a two component model, a multiple blackbody for the soft emission and a Comptonized or a cut-off power law model for the hard component. Finally, by the detection of two X-ray bursters with JEM-X, we confirm the bursting nature of KS 1741-293, including this source in the class of the hard tailed X-ray bursters.Comment: 7 pages, accepted for publication on MNRA

Numerical Modeling of the Internal Temperature in the Mammary Gland

The microwave thermometry method for the diagnosis of breast cancer is based on an analysis of the internal temperature distribution.This paper is devoted to the construction of a mathematical model for increasing the accuracy of measuring the internal temperature of mammary glands, which are regarded as a complex combination of several components, such as fat tissue, muscle tissue, milk lobules, skin, blood flows, tumor tissue. Each of these biocomponents is determined by its own set of physical parameters. Our numerical model is designed to calculate the spatial distributions of the electric microwave field and the temperature inside the biological tissue. We compare the numerical simulations results to the real medical measurements of the internal temperature.Comment: 8 pages, 4 figure

Ubiquitin carboxyl-terminal hydrolase 1 (UCHL1) is a potential tumour suppressor in prostate cancer and is frequently silenced by promoter methylation

<p>Abstract</p> <p>Background</p> <p>We have previously reported significant downregulation of ubiquitin carboxyl-terminal hydrolase 1 (UCHL1) in prostate cancer (PCa) compared to the surrounding benign tissue. UCHL1 plays an important role in ubiquitin system and different cellular processes such as cell proliferation and differentiation. We now show that the underlying mechanism of UCHL1 downregulation in PCa is linked to its promoter hypermethylation. Furthermore, we present evidences that UCHL1 expression can affect the behavior of prostate cancer cells in different ways.</p> <p>Results</p> <p>Methylation specific PCR analysis results showed a highly methylated promoter region for UCHL1 in 90% (18/20) of tumor tissue compared to 15% (3/20) of normal tissues from PCa patients. Pyrosequencing results confirmed a mean methylation of 41.4% in PCa whereas only 8.6% in normal tissues. To conduct functional analysis of UCHL1 in PCa, UCHL1 is overexpressed in LNCaP cells whose UCHL1 expression is normally suppressed by promoter methylation and found that UCHL1 has the ability to decrease the rate of cell proliferation and suppresses anchorage-independent growth of these cells. In further analysis, we found evidence that exogenous expression of UCHL1 suppress LNCaP cells growth probably via p53-mediated inhibition of Akt/PKB phosphorylation and also via accumulation of p27kip1 a cyclin dependant kinase inhibitor of cell cycle regulating proteins. Notably, we also observed that exogenous expression of UCHL1 induced a senescent phenotype that was detected by using the SA-ß-gal assay and might be due to increased p14ARF, p53, p27kip1 and decreased MDM2.</p> <p>Conclusion</p> <p>From these results, we propose that UCHL1 downregulation via promoter hypermethylation plays an important role in various molecular aspects of PCa biology, such as morphological diversification and regulation of proliferation.</p