Controle em campo e pós-colheita de doenças e metabolismo do morangueiro após tratamento com Saccharomyces cerevisiae /

Orientador: Prof. Dr. Luiz Antonio BiasiCo-orientadores: Profª Drª Louise Larissa May de Mio e Prof. Dr. Cicero DeschampsTese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Agronomia. Defesa: Curitiba, 2007Inclui bibliografiaÁrea de concentração: Produção vegeta

Efeito de extratos vegetais em soja sob condições de laboratório e campo.

O Brasil é o maior produtor mundial e o Paraná o maior produtor nacional de soja orgânica. A cultura vem sendo uma alternativa na viabilização econômica de pequenas propriedades, sobretudo no Sudoeste Paranaense. Com a expansão da atividade aumenta a demanda por pesquisas visando obter alternativas aos agrotóxicos no manejo fitossanitário da cultura. Assim, no presente trabalho, o objetivo foi avaliar o efeito da aplicação de extratos vegetais sobre a produção de fitoalexinas, o desenvolvimento de doenças e a produtividade de soja. O trabalho foi realizado in vitro e in vivo na UTFPR Campus Dois Vizinhos. Avaliou-se o alho (Allium sativum - 10 mL.L-1), neem (Azadirachta indica - 5 mL.L-1) e timbó (Derris spp. - 6 mL.L-1), isoladamente ou em combinações. Os extratos vegetais a base de alho e neem induziram a produção de fitoalexinas gliceolinas em cotilédones e reduziram a incidência de oídio causado por Microsphaera diffusa em plantas de soja

Electroweak scale neutrinos and decaying dark matter

We explore the scalar phenomenology of a model of electroweak scale neutrinos that incorporates the presence of a lepton number violating singlet scalar. An analysis of the pseudoscalar-Majoron field associated to this singlet field is carried out in order to verify the viability of the model and to restrict its parameter space. In particular we study the Majoron decay $J \to \nu \nu$ and use the bounds on the Majoron mass and width obtained in a modified Majoron Decaying Dark Matter scenario.Comment: 8 pages, 6 figures. A discussion on the invisible Higgs decay mode present in the model and some references were added . Version to appear in PL

Enzimas associadas a indução de resistência em morangueiro pelo uso de quitosana e acibenzolar-s-metil

A indução de resistência em plantas a patógenos  com a utilização de indutores   está sendo amplamente estudada considerando a demanda por frutos  mais saudáveis. O objetivo deste trabalho foi avaliar a atividade de enzimas associadas a indução de resistência em morangueiro pelo uso de quitosana e  Acibenzolar-S-Metil (ASM). O delineamento experimental foi de blocos ao acaso com 16 plantas por parcela e cinco repetições. Os tratamentos foram quitosana (1,0%); ASM (0,0025%), com aplicação de fungicidas e à testemunha (água destilada). A aplicação dos tratamentos ocorreu 45 dias após o plantio das mudas de morangueiro cv. Aroma e as amostras foliares foram coletadas 24, 72, 120 e 168 h após a aplicação dos mesmos. As PRs-proteinas quitinase e b-1,3-glucanase são ativadas pelo uso dos indutores, sendo a b-1,3-glucanase pronunciada nas primeiras 120 horas após a aplicação dos indutores  e a quitinase a partir de 168 horas da indução.

Effect of different Bacillus thuringiensis strains on the longevity of Africanized honey bee

The aim of this study was to assess the effects of three strains of Bacillus thuringiensis (Bt) on the longevity of workers of Africanized honey bee. Solutions at a concentration of 3 × 108 spores.mL-1 (dosage) were prepared for each strain of Bt (IPS 82, BR 81, and BR 147). Three bioassays were performed as follows: spraying on the bees, contact with the sprayed surface, and candy paste incorporated with Bt. The bees of the Bt bioassay were submitted to histological analysis of the mesenteron. The longevity of workers was assessed from one to 120 hours using different ranges. It was found that the bees that were exposed to the strain of Bt IPS 82, in the spraying test, exhibited a reduced longevity. In the contact test, the BR 147 strain reduced the longevity of the bees. In the food test, in turn, the three studied strains reduced the longevity of the bees as follows: Bt IPS 82: 64.5 hours; Bt BR 81: 64.5 hours; and Bt BR 147: 60.0 hours. The Bt BR 81 strain was considered the most selective of the evaluated strains on Apis mellifera, reducing the longevity of this bee only when it came into contact by the method of ingestion

The Long-Baseline Neutrino Experiment: Exploring Fundamental Symmetries of the Universe

The preponderance of matter over antimatter in the early Universe, the dynamics of the supernova bursts that produced the heavy elements necessary for life and whether protons eventually decay --- these mysteries at the forefront of particle physics and astrophysics are key to understanding the early evolution of our Universe, its current state and its eventual fate. The Long-Baseline Neutrino Experiment (LBNE) represents an extensively developed plan for a world-class experiment dedicated to addressing these questions. LBNE is conceived around three central components: (1) a new, high-intensity neutrino source generated from a megawatt-class proton accelerator at Fermi National Accelerator Laboratory, (2) a near neutrino detector just downstream of the source, and (3) a massive liquid argon time-projection chamber deployed as a far detector deep underground at the Sanford Underground Research Facility. This facility, located at the site of the former Homestake Mine in Lead, South Dakota, is approximately 1,300 km from the neutrino source at Fermilab -- a distance (baseline) that delivers optimal sensitivity to neutrino charge-parity symmetry violation and mass ordering effects. This ambitious yet cost-effective design incorporates scalability and flexibility and can accommodate a variety of upgrades and contributions. With its exceptional combination of experimental configuration, technical capabilities, and potential for transformative discoveries, LBNE promises to be a vital facility for the field of particle physics worldwide, providing physicists from around the globe with opportunities to collaborate in a twenty to thirty year program of exciting science. In this document we provide a comprehensive overview of LBNE's scientific objectives, its place in the landscape of neutrino physics worldwide, the technologies it will incorporate and the capabilities it will possess.Comment: Major update of previous version. This is the reference document for LBNE science program and current status. Chapters 1, 3, and 9 provide a comprehensive overview of LBNE's scientific objectives, its place in the landscape of neutrino physics worldwide, the technologies it will incorporate and the capabilities it will possess. 288 pages, 116 figure