Navigation accuracy for infrared equipped Apollo aircraft for reentry tracking

Navigational accuracy of infrared acquisition and tracking system for Apollo reentry aircraf

Optical and microwave communications - A comparison

Microwave, millimeter wave, and optical spacecraft communication system

Parametric analysis of microwave and laser systems for communication and tracking. Volume 2 - System selection

System selection criteria of microwave and laser systems for communication and tracking - Vol.

Is cytomegalovirus reactivation increasing the mortality of patients with severe sepsis?

Cytomegalovirus (CMV) is a ubiquitous virus present in approximately two-thirds of the healthy population. This virus rarely causes an active disease in healthy individuals, but it is among the most common opportunistic infections in immunocompromised patients such as solid organ transplant recipients, patients receiving chemotherapy for cancer or patients with human immunodeficiency virus. Critically ill patients who are immunocompetent before intensive care unit admission may also become more prone to develop active CMV infection if they have prolonged hospitalizations, high disease severity, and severe sepsis. The development of active CMV infection in these critically ill patients has been associated with a significantly higher risk of death in several previous studies. The present issue of Critical Care brings a new study by Heininger and colleagues in which the authors found that patients with severe sepsis who developed active CMV infection had significantly longer intensive care unit and hospital stays, prolonged mechanical ventilation, but no changes in mortality compared to patients without CMV infection. We discuss the possible reasons for their findings (for example, selection bias and low (20%) statistical power to detect mortality endpoints), and also perform an update of our previous meta-analysis with the addition of Heininger and colleagues' study to verify whether the higher mortality rate with CMV holds. Our updated meta-analysis with approximately 1,000 patients shows that active CMV infection continues to be associated with a significant 81% higher mortality rate than that in critically ill patients without active CMV infection

Composição química e usos da semente de imbuia nativa do município de Colombo, PR.

bitstream/CNPMS-2010/22843/1/com-tec218.pd

Presença / ausência de espinhos em progênies de pupunha (Bactris gasipaes) do projeto RECA como fonte de sementes.

Nota técnica

Efeito do tamanho e peso sobre a germinação de sementes de pupunha (Bactris gasipaes KUNTH.).

Resumo 39

Manganese Oxide/Hemin-Functionalized Graphene as a Platform for Peroxynitrite Sensing

Peroxynitrite (ONOO−, PON) is a powerful oxidizing agent generated in vivo by the diffusion-limited reaction of nitric oxide (NO) and superoxide (O2˙−) radicals. Under oxidative stress, cumulated peroxynitrite levels are associated with chronic inflammatory disorders and other pathophysiological conditions. The accurate detection of peroxynitrite in biological systems is important, not only to understand the genesis and development of diseases, but also to explore and design potential therapeutics. Herein, a manganese oxide/hemin-modified graphene interface is explored as a platform for peroxynitrite amperometric detection. Hemin-functionalized reduced graphene oxide was further modified with manganese oxide nanoparticles to provide a composite material with catalytic activity toward the electrochemical oxidation of peroxynitrite. The morphology of the composite material was characterized using scanning electron microscopy, energy dispersive X-ray analysis, X-ray photoelectron spectroscopy, and UV-Vis absorption measurements. We investigated the electrocatalytic oxidation of peroxynitrite on graphite electrodes modified with the composite material using cyclic voltammetry and amperometry. The results showed that the incorporation of manganese oxide nanoparticles into graphene/hemin material enhances the catalytic detection of peroxynitrite compared to graphene/hemin alone

Estrutura genética de populações de Grevillea robusta A. Cunn. ex. R. Br. estabelecidas no sul do Brasil.

Resumo

Mini-garfagem: um novo metodo para a enxertia do mogno sul-americano (Swietenia macrophylla King).

bitstream/CNPF-2009-09/30404/1/com_tec62.pd