Prrx1b restricts fibrosis and promotes Nrg1-dependent cardiomyocyte proliferation during zebrafish heart regeneration

Therapeutic cell differentiatio

A pilot study of acute phase proteins as indicators of bovine mastitis caused by different pathogens

This study analysed three acute phase proteins in milk from natural cases of bovine mastitis and compared their profiles across different pathogens causing the infection. Their ability to differentiate subclinical and clinical mastitis from normal (uninfected) milk samples was also examined. Samples from various dairy farms across Scotland submitted to the Veterinary Diagnostic Services unit of the University of Glasgow were used for this study. They were subjected to microbiological examination for mastitis pathogens, evaluation of somatic cell counts and analyses by ELISAs for haptoglobin, C-reactive protein and mammary associated serum amyloid A3. Each acute phase protein (APP) was compared across pathogens and form of mastitis. Significant differences (P = 0.000) were observed for each APP between causative pathogen and form of mastitis. There were significant correlations between the pathogen and the form of mastitis and the 3 APP showed similar profile for the different pathogen type and forms of mastitis. It can be concluded that the aetiological pathogen of mastitis to a large extent influences the clinical form of the disease, this, ultimately being reflected in the degree and course of secretions of the acute phase proteins; Hp, M-SAA3 and CRP into milk during mastitis. Variations of which, show correspondent patterns with related pathogen/form-of-mastitis. [Abstract copyright: Copyright © 2018 Elsevier Ltd. All rights reserved.

Architecture for context-aware multiparty delivery in mobile heterogeneous networks

Future networks are envisioned to satisfy the user needs and improve their quality of experience. This requires the networks to support context-aware information, where context of the user, session, network and environment will greatly influence the way the session is delivered: new approaches are required to deal with the overall context information and network reaction to constantly context changes. This paper presents a context-aware architecture that provides delivery of multiparty services in heterogeneous and mobile environments. The architecture, its elements and functionalities are described through a specific application to a context-driven use case scenario. We show that this architecture is able to provide personalized and multiparty services to the users, addressing their characteristics and preferences, and optimizing network support while mobility and heterogeneous environments are in place. ©2009 IEEE

Context-aware multiparty services delivery: Evaluation and experimentation

This paper addresses the challenge of enabling efficient multimedia group communications in today's highly heterogeneous networking environment. In particular, such an environment calls for a multiparty delivery solution capable of finding an optimal balance between two apparently contradictory needs: on one hand personalizing the service delivery for each user based on his particular context to offer the desired quality of experience, and on the other hand optimizing network resources by maximizing the use of traffic aggregation techniques like IP multicast when possible. The proposed context-aware multimedia multiparty delivery architecture reaches this objective by optimizing the service delivery for each user through dynamic adaptations at the session, transport, and network layers. These adaptations encompass means for dynamic selection of the best user device (if multiple are available), media coding, access network, routing path, transport connection type, transp ort reliability scheme, and QoS support. Both the networking context of the user and his environmental context (typically acquired from sensors) are taken into account in that process. In particular, the architecture (a) enables dynamic clustering of users with similar contexts into subgroups receiving the same content but in different formats (e.g. different media codings); and (b) for each subgroup it builds a QoS-enabled multiparty transport overlay tree maximizing the use of IP multicast when available for efficient use of network resources. This architecture has been validated and evaluated both through simulation and prototyping; and the results obtained are presented hereunder

Crecimiento inicial de Palo de Rosa (Aniba rosaeodora Ducke) en distintos ambientes de fertilidad Growth of initial Rosewood (Aniba rosaeodora Ducke) in different environnement of fertility

Los estudios de requerimientos nutricionales son de gran importancia para identificar aquellos más importantes en el desarrollo fisiológico y crecimiento de plántulas. Con el objetivo de evaluar las exigencias nutricionales y los efectos de la omisión de macronutrientes en el crecimiento de plántulas de Aniba rosaeodora; se realizó un experimento en el vivero del INPA-Amazonas-Brasil teniendo como substrato un suelo Podozolico Rojo de baja disponibilidad de nutrientes. Se utilizaron 8 tratamientos bajo la técnica del nutriente faltante: Control (Suelo con macronutrientes), Suelo natural, y la omisión de un macronutriente por vez (-N, -P, -K, -Ca, -Mg, -S). Se evaluaron las siguientes características: tasa de crecimiento relativo (TCR), Tasa de asimilación neta (TAN), peso de la materia seca de la parte aérea (MSPA) y de las raíces (MSR), contenido de nutrientes en las hojas, concluyendo que el N, Mg y Ca, demostraron ser limitantes al crecimiento en suelo con pequeña disponibilidad; Las plántulas de A. rosaeodora presentaron un bajo requerimiento nutricional para el P, K y S. La omisión de Ca y N perjudica TCR de la especie. Los elementos más importantes para la MSPA fueron el Ca y el Mg; actuando el Mg más en el área foliar; por otro lado la omisión de azufre favorece la absorción de macronutrientes (N, P, K, Ca, Mg).<br>Studies of nutritional requirements are of great importance for identifying the most important nutrients in physiologic development and seedling growth. A greenhouse pot experiment was conducted at INPA to evaluate the mineral nutritional demands and the effects of macronutrient omission in the plant growth of Aniba rosaeodora Ducke. The following treatments were used: Complete (fertilization with N, P, K, Ca, Mg, S, B and Zn), Standard (nature soil), Complete without N, Complete without P, Complete without K, Complete without Ca, Complete without Mg, and Complete without S. An Ultisoil with low nutrient availability was used as a substratum. The following characteristics were evaluated, relative growth rate (RGR), net assimilation rate (NAR), plant height, diameter, dry matter production of the aerial part (DMPAP) and amount of nutrient in the dry matter of leaves. We concluded from the results that: low availability of N, Ca and Mg constraints the growth of the Aniba rosaeodora plants. Seedlings of A. rosaeodora required little P, K and S. The omission of Ca and N harmed the RGR of the species. The most important elements for DMPAP were Ca and Mg; the Mg acting more in the leaf area; on the other hand, the omission of sulfur favored the macronutrient absorption (N, P, K, Ca, Mg)