Four Probe Method
Mostrando 13-24 de 121 artigos, teses e dissertações.
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13. Micro e nanofabricação (fabricação de contatos eletricos) por feixe de ions focalizados / Micro and nano (manufacture of electrical contacts) with focused ion beam
Nanoscale science and technology is a young and burgeoning field that encompasses nearly every discipline of science and engineering, the rapid growth of the field in the past decades has been enable by the sustained advances in the fabrication and characterization of materials. This work presents the hybrid process for fabrication of micro and nanocontacts,
Publicado em: 2007
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14. Segregação no transporte de fertilizantes comercializados em embalagens "BiG Bag"
The majority of mineral fertilizers used in Brazil are sold in the form of granules mixture in order to provide, lower storage and transportation costs, lower probability of hardening, easier handling and also to simplify its use. Despite the advantages mentioned, such mixtures, which might present two or three primary macronutrients, secondary macronutrient
Publicado em: 2006
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15. Construção de uma fonte de corrente e de uma sonda para medida de condutividade pelo método da sonda de quatro pontas
This paper describes the construction of an eletrical current source and of a probe to be used in the measurement of eletrical conductivity through a four-point probe method. These pieces of equipments can be obtained at the low price of US$ 50.00 and are adequate for eletrical conductivity measurements in the semiconductor range, that is from 10-1 to 10-6 S
Química Nova. Publicado em: 2003-10
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16. Blendas de polianilina e poliestireno obtidas por processamento reativo : preparação e caracterização
One of the major current objectives in the research of intrinsically conducting polymers (PIC) is the production of blends, which combine the processing properties of common thermoplastic polymers with the conductivity of conducting polymers. The main problem in applying PIC in large scale in the plastic industry has been the infusibility of these polymers,
Publicado em: 2002
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17. Crescimento e caracterização de liga eutetica sn-se
In many eutectic alloys. directional solidification is likely to resu1t in the formation of a fine anisotropic and regular structure of the lamellar or rod type. The development of specific microstructural characteristics depends upon the conditions at and the shape of the solid/liquid interface. To grow composite materiais from eutectic alloys is the main p
Publicado em: 1994
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18. Development of a rapid method for determining the susceptibility of Mycobacterium tuberculosis to isoniazid using the Gen-Probe DNA Hybridization System.
A rapid test was developed for determining the susceptibility of Mycobacterium tuberculosis to isoniazid by using nucleic acid hybridization. The method was based on quantification of total mycobacterial rRNA hybridized to a 125I-labeled DNA probe in the absence and presence of various concentrations of isoniazid. The radioactive hybridized complex was isola
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19. Molecular probe for typing strains of Candida albicans.
A method for separating strains of Candida albicans into nine possible groups was devised by using a cDNA probe for enolase and Southern blot analysis. Twenty-three isolates of C. albicans were found to be distributed among eight of the groups. Fifteen isolates from a single hospital segregated into four of the groups.
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20. Identification of Streptococcus pneumoniae with a DNA probe.
The Accuprobe Streptococcus pneumoniae Culture Identification Test (Gen-Probe, Inc.) was evaluated with 172 isolates of S. pneumoniae and 204 nonpneumococcal isolates. The sensitivity and specificity of the Accuprobe test were 100%. Optimum results were obtained when four or more discrete colonies were selected for testing. The Accuprobe test was determined
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21. Reassociation of complementary strand-specific adenovirus type 2 DNA with viral DNA sequences of transformed cells.
Complementary strand-specific adenovirus DNA, either full length or from restriction enzyme cleavage fragments, was used to estimate the fractional representation and abundance of viral sequences in two adenovirus type 2 (Ad2)-transformed rat cell lines, A2F19 and A2T2C4. The reassociation method introduced is based on the linear relationship, after exhausti
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22. Two-dimensional echoencephalography with electronic sector scanning: Clinical experiences with a new method
A new form of ultrasound diagnostic possibility is presented (the electroscan). The basic principles of this two dimensional method are described. Special attention is given to the probe consisting of an array of 21 elements of piezo-electric material. The results of this method in four patients are discussed (meningioma, arteriovenous aneurysm, subdural hae
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23. Evaluation of a nonisotopic probe for detection of Chlamydia trachomatis in endocervical specimens.
A nonisotopic probe (Gen-Probe PACE; Gen-Probe, Inc., San Diego, Calif.) for detection of Chlamydia trachomatis in endocervical specimens was evaluated in 344 women attending a dysplasia clinic or an obstetrics clinic and 158 women who visited an emergency room. For each patient, the probe, a tissue cell culture, and a direct immunofluorescent-antibody test
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24. 16S rRNA-based probes and polymerase chain reaction method to detect Listeria monocytogenes cells added to foods.
A rapid polymerase chain reaction (PCR) method was developed for detection of Listeria monocytogenes in foods. This method used a pair of primers based on a unique region in the 16S rRNA sequence of L. monocytogenes, which were previously reported by us to yield a specific nucleic acid probe. Our method included use of a shorter denaturing time, a shorter an