Pulsed Direct And Constant Direct Currents In The Pilocarpine Iontophoresis Sweat Chloride Test

Background: The classic sweat test (CST) is the golden standard for cystic fibrosis (CF) diagnosis. Then, our aim was compare the production and volume of sweat, and side effects caused by pulsed direct current (PDC) and constant direct current (CDC). To determine the optimal stimulation time (ST) for the sweat collection. To verify the PDC as CF diagnosis option. Methods: Prospective study with cross-sectional experimental intervention. Experiment 1 (right arm): PDC and CDC. ST at 10 min and sweat collected at 30 min. Currents of 0.5; 0.75; 1.0 and 1.5 mA and frequencies of 0, 200, 1,000 and 5,000 Hz applied. Experiment 2 (left arm): current of 1.0 mA, ST at 5 and 10 min and sweat collected at 15 and 30 min with frequencies of 0; 200; 1,000 and 5,000 Hz applied Experiments 1 and 2 were performed with current density (CD) from 0.07 to 0.21 mA/cm2. Experiment 3: PDC was used in typical CF patients with two CFTR mutations screened and or with CF diagnosis by rectal biopsy and patients with atypical CF. Results: 48 subjects (79.16% female) with average of 29.54 ± 8.87 years old were enrolled. There was no statistical difference between the interaction of frequency and current in the sweat weight (p = 0.7488). Individually, positive association was achieved between weight sweat and stimulation frequency (p = 0.0088); and current (p = 0.0025). The sweat production was higher for 10 min of stimulation (p = 0.0023). The sweat collection was better for 30 min (p = 0.0019). The skin impedance was not influenced by ST and sweat collection (p > 0.05). The current frequency was inversely associated with the skin impedance (p < 0.0001). The skin temperature measured before stimulation was higher than after (p < 0.0001). In Experiment 3 (29 subjects) the PDC showed better kappa index compared to CDC (0.9218 versus 0.5205, respectively). 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Water Filling For Uncoded Communications Over Parallel Gaussian Channels

We investigate the problem of allocating power to send uncoded information over parallel Gaussian channels. We examine the reason why regular "water-filling" does not work in the uncoded case, and show that a modification of the noise level of each subchannel lets "water-filling" work in this case.21

Cardiac and pulmonary alterations in symptomatic and asymptomatic dogs infectednaturally with Leishmania (Leishmania) chagasi

Fifteen symptomatic and seven asymptomatic dogs infected naturally with Leishmania chagasi were examined in order to identify the presence of parasites and changes in heart and lung. Histopathological, cytological, and immunohistochemical analyses were performed on samples of heart and lung tissues. An inflammatory reaction characterized by inflammatory mononuclear, perivascular and intermuscular infiltrates was observed in both symptomatic and asymptomatic animals on histopathological analysis of the heart. In the lung, there was thickening of the alveolar septa due to congestion, edema, inflammatory infiltrate, and fibroblast proliferation. A focal reaction was observed although a diffuse reaction was present in both groups. On cytological examination, heart and lung imprints revealed amastigotes in two symptomatic animals and heart imprints were found in 1 asymptomatic dog. Immunoperoxidase staining showed amastigotes in the lung and heart of only 1 of 6 symptomatic animals examined. Within the ethical principles and limits of this research, it can be inferred that the study of heart and lung alterations in canine visceral leishmaniasis is increasingly important for understanding the problem related to humans. Dogs with visceral leishmaniasis were a good experimental model, since infection was caused by the same agent and the animals developed clinical, pathological and immunological alterations similar to those observed in humans

Infecção por leptospira em bovinos e sua associação com transtornos reprodutivos e condições climáticas Leptospiral infection in bovine and its association with reproductive failure and climatic conditions

Realizou-se estudo sorológico, por meio do teste de soroaglutinação microscópica, utilizando antígenos vivos, para pesquisa de aglutininas anti-leptospiras em bovinos de leite na Microrregião de Parnaíba, PI, em dois períodos do ano: estações seca e chuvosa. Das 1975 amostras analisadas, pertinentes a 16 rebanhos, 1044 (52,9%) mostraram-se positivas a pelo menos um sorovar e todos os rebanhos apresentaram animais reagentes. A prevalência variou entre 25% e 81%. O sorovar de maior prevalência foi Hardjo reagindo em 39,5%, seguido de Wolffi com 26,7% e Hebdomadis com 12,2%. Os sorovares mais freqüentes foram Hardjo e Wolffi presentes em 100% dos rebanhos. Foram ainda encontrados animais reagentes aos sorovares Australis, Bratislava, Autumnalis, Butembo, Icterohaemorrhagiae, Shermani e Patoc. Houve correlação positiva entre a proporção de animais sororreagentes para leptospirose e pluviometria, mas não para temperatura. Foi constatada associação entre infecção e ocorrência de transtornos reprodutivos, e o sorovar que apresentou maior associação foi o Hardjo.This study was carried out by serologic sampling (microscopic agglutination test, living antigens) for anti-leptospiral antibodies in dairy farms of Parnaíba microrregion, state of Piauí, Brazil, during dry and rainny seasons. All 16 flocks were infected and 1044 out of 1975 sera samples (52.9%) were positive for at least one serovar. Higher prevalence was serovar Hardjo (39.5%) folowed by Wolffi (26.7%) and Hebdomadis (12.2%). Hardjo and Wolffi were found in all flocks. Serovars Australis, Bratislava, Autumnalis, Butembo, Hebdomadis, Icterohaemorrhagiae, Hardjo, Wolffi, Shermani and Patoc, were also present. A positive correlation between prevalence of infection and pluviometric was detected, but temperature ratios. Association between infection and reproductive failures was evidenced mainly regarding Hardjo serovar

Conidiobolomicose em ovinos: reavaliação de três casos previamente diagnosticados como tumor etimoidal enzoótico

Conidiobolomycosis is an infection caused by fungi of the genus Conidiobolus spp. that is associated with a granulomatous rhinitis in humans and animals. In sheep, the disease is clinically characterized by respiratory changes, exophthalmia, craniofacial asymmetry, and fever. Microscopically, there are multifocal granulomas containing intralesional hyphae. For a long time, this disease was diagnosed as Enzootic Ethmoid Tumor. This report described three cases of conidiobolomycosis that had been previously diagnosed as Enzootic Ethmoid Tumor. Samples of nasal cavity, lung, parotid gland, and lymph node from three sheep submitted to histopathological examination in 1979 were retrieved in 2010 for a new histological, histochemical, and immunohistochemical evaluations. Paraffin-embedded tissue sections were stained with Hematoxylin-Eosin, Grocott's Metanamine Silver, and Periodic Acid Schiff. Immunohistochemistry was performed on paraffin embedded tissues using anti-cytokeratin primary antibody. Based on histopathology, histochemistry, and immunohistochemistry, the diagnosis of conidiobolomycosis was confirmed in three sheep, which had been previously diagnosed as Enzootic Ethmoid Tumor in 1979

Flora Of Ceará State, Brazil: Capparaceae [flora Do Ceará, Brasil: Capparaceae]

Capparaceae comprises 25 genera and approximately 500 species, having worldwide distribution, but occurring especially in tropical and subtropical regions and being well represented in seasonally dry tropical forests. In Brazil, there are 12 genera and 28 species, twelve of which are endemic. Species of Capparaceae are woody plants with simple leaves or 3-foliolate (Crateva); flowers having an exsert gynophore and succulent fruits. This study aims to describe the species of Capparaceae occurring in Ceará and map their distribution within the state, thus contributing to the understanding of the local flora. This study was based on the analysis of specimens obtained during field work, material available from the herbaria EAC, HUEFS, HVASF, IPA and UFRN, and examination of bibliography and types. Five species were recorded: Capparidastrum frondosum, Crateva tapia, Cynophalla flexuosa, Cynophalla hastata and Neocalyptrocalyx longifolium. 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Disponível em Acesso em 2 maio 201