Circular Patches
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Series Fed Designs of Planar Circular and Hexagonal Microstrip Antenna Arrays for High Gain and Reduced First Side Lobe Level Radiation
Abstract To achieve a high gain and low first side-lobe level, variants of linear and planar series fed circular and hexagonal microstrip antenna arrays using the binomial distribution, are proposed around 3000 MHz frequency band, on thinner Arlon substrate (h ~ 0.027λg). The linear 7 × 1 array of circular patches, yields first side-lobe level of −25 dB
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. DIFFERENTIAL RESPONSE OF EPIPHYTIC LICHEN TAXA TO AGRICULTURAL LAND USE IN A FRAGMENTED FOREST IN CENTRAL ARGENTINA
ABSTRACT The seasonally dry subtropical forest, especially the Espinal forest in central Argentina (one of the most fragmented ecoregions), is affected by intensive agricultural activity. These activities are the main anthropogenic sources of atmospheric nitrogen compounds and their effects on lichens have been extensively studied, making them excellent ecol
CERNE. Publicado em: 2020-06
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3. Rigorous Analysis of a Compact Triangular Antenna Array Using the Spectral Domain Method
Abstract The main objective of this work is the characterization of triangular array antenna with circular form by using the spectral domain technique. Firstly, the spectral domain formulation of single triangular patch antenna is given, in order to calculate its resonant frequencies and its radiation patterns. Then, we calculate and plot the total radiated
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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4. Comparative study on morpho-anatomy of leaf, stem and root of Boerhaavia diffusa L. (Nyctaginaceae) and its adulterant plants
ABSTRACT Punarnava (Boerhaavia diffusa L.- Nyctaginaceae) is a promising drug to rejuvenate new cells in the body. It is well known in Ayurvedic medicine and locally called Tambadivasu. Superficially it is similar to other species of Boerhaavia and species of Trianthema and Sesuvium. Due to the minute morphological differences, the above plants are erroneous
Braz. J. Pharm. Sci.. Publicado em: 2016-09
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5. Uma nova proposta de antenas Quasi-Yagi banda larga para comunicação sem fio
Neste trabalho, antenas planares quasi-Yagi são estudadas com base no conceito das antenas Yagi-Uda clássicas. Estas antenas representam melhorias sobre as topologias das antenas impressas existentes por apresentarem características de banda larga, excelentes diagramas de irradiação e construção simples. Novas configurações são adaptadas para o dri
Publicado em: 2009
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6. Análise de antenas de microfita com patches circulares sobre substratos anisotrópicos usando o método dos potenciais de Hertz
Este trabalho consiste na análise teórica e numérica das características de uma antena de microfita com patch circular, cujo substrato é composto por materiais dielétricos isotrópicos e anisotrópicos uniaxiais. Para isto, uma análise de onda completa é realizada, utilizando-se o Método dos Potenciais Vetoriais de Hertz no domínio da transformada
Publicado em: 2005
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7. The Biological Activity of the Prototypic Cyclotide Kalata B1 Is Modulated by the Formation of Multimeric Pores*
The cyclotides are a large family of circular mini-proteins containing a cystine knot motif. They are expressed in plants as defense-related proteins, with insecticidal activity. Here we investigate their role in membrane interaction and disruption. Kalata B1, a prototypic cyclotide, was found to induce leakage of the self-quenching fluorophore, carboxyfluor
American Society for Biochemistry and Molecular Biology.
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8. Characterization of early DNA synthesis in Xenopus eggs after injection of circular plasmid DNA.
Circular plasmid DNA is known to replicate when injected into unfertilized eggs of Xenopus laevis. We characterized early DNA synthesis which precedes the replication. Incorporation of a radioactive precursor into covalent closed circular DNA becomes detectable as early as 2 minutes after injection. Judging from the sensitivity to aphidicolin, replicative DN
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9. Open channel and competitive block of the embryonic form of the nicotinic receptor of mouse myotubes by (+)-tubocurarine.
1. Embryonic-like nicotinic channels were studied in mouse myotubes. Channel currents were measured by patch clamping outside-out excised patches to which pulses of agonists and drugs could be applied by a liquid filament switch. The holding potential of the patches was generally around-10 to-40 mV. 2. Pulses of 100 microM or 1 mM acetylcholine (ACh) elicite
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10. Infra-red transillumination stereophotography of the iris in Fuchs's heterochromic cyclitis.
The structural pattern of the iris in 13 patients with Fuchs's heterochromic cyclitis (FHC) was studied by infra-red transillumination stereophotography. All eyes with FHC showed atrophic changes of the iris. Extensive iris atrophy appeared as light, even translucence of the iris, associated in some cases with occasional dense small patches or pigment clumps
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11. Organization of Ryanodine Receptors, Transverse Tubules, and Sodium-Calcium Exchanger in Rat Myocytes
Confocal and total internal reflection fluorescence imaging was used to examine the distribution of caveolin-3, sodium-calcium exchange (NCX) and ryanodine receptors (RyRs) in rat ventricular myocytes. Transverse and longitudinal optical sectioning shows that NCX is distributed widely along the transverse and longitudinal tubular system (t-system). The NCX l
The Biophysical Society.
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12. Activation of delayed rectifier potassium channels in canine proximal colon by vasoactive intestinal peptide.
1. Vasoactive intestinal peptide (VIP) inhibits phasic contractions and tone of gastrointestinal smooth muscles. This study examines electrical mechanisms that may mediate the inhibitory actions of VIP. 2. Electrical slow waves were recorded from canine proximal colon circular muscles. VIP (0.1 microM) decreased basal slow wave frequency but had no effect on