Normal Cones and Thompson Metric

The aim of this paper is to study the basic properties of the Thompson metric $d_T$ in the general case of a real linear space $X$ ordered by a cone $K$. We show that $d_T$ has monotonicity properties which make it compatible with the linear structure. We also prove several convexity properties of $d_T$ and some results concerning the topology of $d_T$, including a brief study of the $d_T$-convergence of monotone sequences. It is shown most of the results are true without any assumption of an Archimedean-type property for $K$. One considers various completeness properties and one studies the relations between them. Since $d_T$ is defined in the context of a generic ordered linear space, with no need of an underlying topological structure, one expects to express its completeness in terms of properties of the ordering, with respect to the linear structure. This is done in this paper and, to the best of our knowledge, this has not been done yet. The Thompson metric $d_T$ and order-unit (semi)norms $|\cdot|_u$ are strongly related and share important properties, as both are defined in terms of the ordered linear structure. Although $d_T$ and $|\cdot|_u$ are only topological (and not metrical) equivalent on $K_u$, we prove that the completeness is a common feature. One proves the completeness of the Thompson metric on a sequentially complete normal cone in a locally convex space. At the end of the paper, it is shown that, in the case of a Banach space, the normality of the cone is also necessary for the completeness of the Thompson metric.Comment: 36 page

Controle químico de lagartas de Eupalamides dedalus em dendezeiros.

bitstream/item/39961/1/Com-Tec-38-Am-Oriental.pd

Substâncias atrativas na captura de adultos de Eupalamides dedalus em dendezais.

bitstream/item/39964/1/Com-Tec-37-Am-Oriental.pd

Biodiversidade, população e economia: uma região de mata atlântica [Biodiversity, Population, and Economy: a region of atlantic forest]

Minas Gerais; Rio Doce; mata atlântica; atlantic forest; sustainable development; conservation; regional development; environment

Broadcast spawning coral <i>Mussismilia hispida</i> can vertically transfer its associated bacterial core

The hologenome theory of evolution (HTE), which is under fierce debate, presupposes that parts of the microbiome are transmitted from one generation to the next [vertical transmission (VT)], which may also influence the evolution of the holobiont. Even though bacteria have previously been described in early life stages of corals, these early life stages (larvae) could have been inoculated in the water and not inside the parental colony (through gametes) carrying the parental microbiome. How Symbiodinium is transmitted to offspring is also not clear, as only one study has described this mechanism in spawners. All other studies refer to incubators. To explore the VT hypothesis and the key components being transferred, colonies of the broadcast spawner species Mussismilia hispida were kept in nurseries until spawning. Gamete bundles, larvae and adult corals were analyzed to identify their associated microbiota with respect to composition and location. Symbiodinium and bacteria were detected by sequencing in gametes and coral planula larvae. However, no cells were detected using microscopy at the gamete stage, which could be related to the absence of those cells inside the oocytes/dispersed in the mucus or to a low resolution of our approach. A preliminary survey of Symbiodinium diversity indicated that parental colonies harbored Symbiodinium clades B, C and G, whereas only clade B was found in oocytes and planula larvae [5 days after fertilization (a.f.)]. The core bacterial populations found in the bundles, planula larvae and parental colonies were identified as members of the genera Burkholderia, Pseudomonas, Acinetobacter, Ralstonia, Inquilinus and Bacillus, suggesting that these populations could be vertically transferred through the mucus. The collective data suggest that spawner corals, such as M. hispida, can transmit Symbiodinium cells and the bacterial core to their offspring by a coral gamete (and that this gamete, with its bacterial load, is released into the water), supporting the HTE. However, more data are required to indicate the stability of the transmitted populations to indicate whether the holobiont can be considered a unit of natural selection or a symbiotic assemblage of independently evolving organisms

Efeito de óleos essenciais e revestimentos comestíveis sobre podridões pós-colheita em manga, cv. Kent.

A procura por novos agentes antimicrobianos, a partir de plantas, é intensa devido à crescente resistência dos micro-organismos patogênicos frente aos produtos sintéticos. Além disso, o uso destes pesticidas a longo prazo, causa impactos negativos para a sociedade e para o meio ambiente devido à poluição causada pelos resíduos químicos. Frente a este problema o objetivo desta pesquisa foi avaliar o efeito do óleo de Lippia sidoides e de Piper aduncum, cera de carnaúba e dextrina para o controle da podridão peduncular em manga cv. Kent. As frutas foram inoculadas com suspensões de 106 conídios/mL de Lasiodiplodia theobromae ou Botryosphaeria dothidea e, após 24 horas, submetidas aos tratamentos. O delineamento foi inteiramente casualizado com três repetições e a unidade experimental foi composta por uma bandeja contendo seis frutas. Após oito dias em câmara fria (10 ± 2 ºC) as frutas permaneceram por cinco dias em temperatura ambiente (25 ± 2 ºC) quando foram realizadas diariamente as avaliações da severidade da doença. Os melhores tratamentos foram Lippia sidoides e Piper aduncum os quais mostraram especificidade para o controle das podridões de L. theobromae e B. dothidea em manga

Putative genes involved in muscle functioning are differentially expressed in Nelore steers divergent for sodium and potassium concentration.

Editores: Luiz Lehmann Coutinho, ESALQ/USP; Luciana Correia de Almeida Regitano, Embrapa Pecuária Sudeste; Gerson Barreto Mourão, ESALQ/USP; Aline Silva Mello Cesar, ESALQ/USP; Bárbara Silva Vignato, FZEA/USP; Mirele Daiana Poleti, ESALQ/USP; Wellison Jarles da Silva Diniz, UFSCar