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| Registros recuperados: 22 | |
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| Guerra, Cristina Aparecida; Pereira, Claudia Maria Miranda de Araujo. |
| This work discusses the importance of the kaki productive chain in the Antônio Carlos district and its growing potentialities, analysed from the perspective of Transaction Costs Economics. The objective is to verify how the transactions between the kaki producers from the Antônio Carlos district and the downstream and upstream agents of the productive chain occur, as well as to study the governance structure in this chain. The data were obtained from semi-structured interviews carried out with seven producers, who were chosen according to criteria such as accessibility and representativity of the district’s production. It was verified that the contracts made between the producers and the downstream industry are classic and the form of governance is the... |
| Tipo: Journal Article |
Palavras-chave: Transaction costs; Kaki; Specificity; Agribusiness; Agricultural Finance; Industrial Organization. |
| Ano: 2008 |
URL: http://purl.umn.edu/61475 |
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| Janes, Holly; Longton, Gary M.; Pepe, Margaret S.. |
| Classification accuracy is the ability of a marker or diagnostic test to discriminate between two groups of individuals, cases and controls, and is commonly summarized by using the receiver operating characteristic (ROC) curve. In studies of classification accuracy, there are often covariates that should be incorporated into the ROC analysis. We describe three ways of using covariate information. For factors that affect marker observations among controls, we present a method for covariate adjustment. For factors that affect discrimination (i.e., the ROC curve), we describe methods for modeling the ROC curve as a function of covariates. Finally, for factors that contribute to discrimination, we propose combining the marker and covariate information, and we... |
| Tipo: Article |
Palavras-chave: Roccurve; Comproc; Rocreg; Receiver operating characteristic analysis; ROC; Covariates; Sensitivity; Specificity; Research Methods/ Statistical Methods. |
| Ano: 2009 |
URL: http://purl.umn.edu/122695 |
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| Pereira, Claudia Maria Miranda de Araujo; Raimundo Melo, Mario; Dias, Pedro Bernardo. |
| The objective of this paper is to characterize the production of roses at the region of Barbacena and to identify its transaction attributes, that is, asset specificity, transaction frequency, and uncertainty. The research is based on the theoretical framework of the New Institutions Economy which allows the use of qualitative methods in order to understand in depth the study object. The results have shown that rose producers in the region of Barbacena seek to demand the requirements of their customers, but they perceive the need of improvement in the productive chain through associations and contractual relations, informal ones included, among the agents involved in the agribusiness of roses. |
| Tipo: Journal Article |
Palavras-chave: Rosas; Nova economia das Instituições e especificidade; Roses; New economics of Institutions; Specificity; Crop Production/Industries; Institutional and Behavioral Economics. |
| Ano: 2010 |
URL: http://purl.umn.edu/102005 |
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| Khan,Anwar Sheed; Ali,Sajid; Khan,Muhammad Tahir; Ahmed,Sajjad; Khattak,Yasir; Abduljabbar,; Irfan,Muhammad; Sajjad,Wasim. |
| ABSTRACT GeneXpert is one of the recent technological instruments used to diagnose tuberculosis in a short span of time. In this study, the performance of GeneXpert MTB/RIF assay for the diagnosis of extrapulmonary tuberculosis (EPTB) was compared with light-emitting diode Fluorescent Microscopy (LED-FM) in Khyber Pakhtunkhwa, Pakistan. A total of 737 EPTB samples were collected from tuberculosis (TB) suspected patients. Out of these samples, male to female ratio was 53% (n = 390) to 47% (n = 347) respectively. The sensitivity and specificity was 73% and 100% for GeneXpert, while 40% and 100% for LED-FM microscopy. This shows that the sensitivity of GeneXpert is 40–50%, higher than LED-FM microscopy. GeneXpert also detected low number of bacilli as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GeneXpert; LED-FM microscopy; Sensitivity; Specificity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400909 |
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| Bellec, Laure; Clerissi, Camille; Edern, Roseline; Foulon, Elodie; Simon, Nathalie; Grimsley, Nigel; Desdevises, Yves. |
| Background: Numerous studies have investigated cospeciation (or cophylogeny) in various host-symbiont systems, and different patterns were inferred, from strict cospeciation where symbiont phylogeny mirrors host phylogeny, to complete absence of correspondence between trees. The degree of cospeciation is generally linked to the level of host specificity in the symbiont species and the opportunity they have to switch hosts. In this study, we investigated cophylogeny for the first time in a microalgae-virus association in the open sea, where symbionts are believed to be highly host-specific but have wide opportunities to switch hosts. We studied prasinovirus-Mamiellales associations using 51 different viral strains infecting 22 host strains, selected from... |
| Tipo: Text |
Palavras-chave: Cophylogeny; Prasinovirus; Phycodnaviridae; Mamiellale; Chlorophyta; Specificity. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00374/48497/48827.pdf |
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| Cantelmo,Narjara Fonseca; Von Pinho,Édila Vilela de Resende; Von Pinho,Renzo Garcia; Von Pinho,Iolanda Vilela; Nascimento,Micaela Sandim. |
| With the growth in the transgenic market, fast and economically viable methodologies are necessary for undertaking transgene detection tests, both for identification of contamination in seeds and in grain. Seeds from commercial conventional GNZ 2004, and transgenic VT-Pro (MON89034), Roundup Ready (NK603) and Herculex (TC1507) maize cultivars were used. In order to simulate different levels of contamination, the transgenic seeds were mixed with conventional seeds at levels of 0.2%, 0.4%, 1.0% and 1.6% for VT-Pro, and 0.2%, 0.5%, 0.8% and 1.2% for Roundup Ready and Herculex. The lateral flow membrane strip test was performed in the whole seed, endosperm and embryo. For evaluation of the specificity of the technique in detection of the TC1507 event by means... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fast testing; Contamination; Specificity; Transgenesis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500003 |
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| Granada,Camille E; Strochein,Marcos; Vargas,Luciano K; Bruxel,Manuela; Sá,Enilson Luiz Saccol de; Passaglia,Luciane M.P. |
| This work aimed to evaluate the symbiotic compatibility and nodulation efficiency of rhizobia isolated from Desmodium incanum, Lotus corniculatus, L. subbiflorus, L. uliginosus and L. glaber plants by cross-inoculation. Twelve reference strains and 21 native isolates of rhizobia were genetically analyzed by the BOX-PCR technique, which showed a high genetic diversity among the rhizobia studied. The isolates were also characterized based on their production of indolic compounds and siderophores, as well as on their tolerance to salinity. Fifteen of the 33 rhizobia analyzed were able to produce indolic compounds, whereas 13 produced siderophores. All the tested rhizobia were sensitive to high salinity, although some were able to grow in solutions of up to 2%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhizobia; Nodulation; Nitrogen; Specificity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000300012 |
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| Thomas, B.; Ollevier, F.P.. |
| The host specificity and population dynamics of <i>Anguillicola crassus</i> in a number of paratenic hosts were investigated. Various freshwater fish species were sampled monthly (March 1990 to March 1991) from the Kolenhaven (Albertcanal, Genk, Belgium) and examined for L<sub>3</sub>-larvae of <i>Anguillicola crassus</i>. Sixteen species were found to be infected: all the physoclist species examined (<i>Gymnocephalus cernua, Lepomis gibbosus, Ictalurus nebulosus, Stizostedion lucioperca, Gasterosteus aculeatus, Oreochromis niloticus</i> and <i>Perca fluviatilis</i>) and those physostome species of which a sufficient number could be examined to detect the infection (<i>Gobio gobio, Leuciscus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Endoparasites; Freshwater fish; Hosts; Introduced species; Parasites; Population dynamics; Specificity; Swim bladder; Anguillicola crassus; Pisces [Fish]. |
| Ano: 1992 |
URL: http://www.vliz.be/imisdocs/publications/299068.pdf |
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| Gardner, Ian A.; Whittington, Richard J.; Caraguel, Charles G. B.; Hick, Paul; Moody, Nicholas J. G.; Corbeil, Serge; Garver, Kyle A.; Warg, Janet V.; Arzul, Isabelle; Purcell, Maureen K.; Crane, Mark St J.; Waltzek, Thomas B.; Olesen, Niels J.; Gallardo Lagno, Alicia. |
| Complete and transparent reporting of key elements of diagnostic accuracy studies for infectious diseases in cultured and wild aquatic animals benefits end-users of these tests, enabling the rational design of surveillance programs, the assessment of test results from clinical cases and comparisons of diagnostic test performance. Based on deficiencies in the Standards for Reporting of Diagnostic Accuracy (STARD) guidelines identified in a prior finfish study (Gardner et al. 2014), we adapted the Standards for Reporting of Animal Diagnostic Accuracy Studies—paratuberculosis (STRADAS-paraTB) checklist of 25 reporting items to increase their relevance to finfish, amphibians, molluscs, and crustaceans and provided examples and explanations for each item. The... |
| Tipo: Text |
Palavras-chave: Reporting standards; Sensitivity; Specificity; Finfish; Amphibians; Molluscs; Crustaceans; STRADAS-paraTB; Diagnostic validation. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00334/44505/44191.pdf |
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| Ma,Min Min; Jiang,Dan; Li,Shuang Ya; Wu,Yuan; Meng,Ju; Huang,Jiang Yao. |
| ABSTRACT Adulterant herbal materials are threats to import and export trade and consumer safety. In this study, we established a simple and rapid examination system for the detection of Phellodendron chinense Schneid. Two detection methods, real-time fluorescence quantitative PCR (real-time PCR) and loop-mediated isothermal amplification (LAMP), were developed for traditional Chinese medicine detection, and their specificity and sensitivity were compared. The DNA of P. chinense was extracted and its special periods amplified with designed primers. Real-time PCR and LAMP experiments were conducted to test the specificity of primers in contrast to other similar species. The template concentration was diluted from 101 ng/µL to 10-5 ng/µL in order to contrast... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Traditional Chinese medicine; Real-time PCR; Phellodendron chinense Schneid; LAMP; Specificity; Sensitivity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100314 |
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| Riou, Virginie; Périot, Marine; Biegala, Isabelle. |
| Oligonucleotide probes are increasingly being used to characterize natural microbial assemblages by Tyramide Signal Amplification-Fluorescent in situ Hybridization (TSA-FISH, or CAtalysed Reporter Deposition CARD-FISH). In view of the fast-growing rRNA databases, we re-evaluated the in silico specificity of eleven bacterial and eukaryotic probes and competitor frequently used for the quantification of marine picoplankton. We performed tests on cell cultures to decrease the risk for non-specific hybridization, before they are used on environmental samples. The probes were confronted to recent databases and hybridization conditions were tested against target strains matching perfectly with the probes, and against the closest non-target strains presenting one... |
| Tipo: Text |
Palavras-chave: TSA-FISH; Probes; Specificity; Marine; Prokaryotes; Eukaryotes; Oligonucleotide; CARD-FISH. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00640/75208/75339.pdf |
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| Valadares,Rafael Borges da Silva; Otero,Joel Tupac; Pereira,Marlon Corrêa; Cardoso,Elke Jurandy Bran Nogueira. |
| In Orchidaceae, association with symbiotic fungi is required for seed germination and seedling development, thereby being the main energy source during the first steps of germination. Colombia is one of the countries with the greatest biodiversity of orchids, with an estimated 3,200 species, but few studies on orchid mycorrhiza have been conducted. In our study, we isolated and sequenced the internal transcribed spacer rDNA region of fungi from two co-occurring Colombian epiphytic orchids, I. utricularioides and P. pusilla, both belonging to the subtribe Oncidiinae. All sequences were recognized as belonging to the genus Ceratobasidium, known to be a common orchid mycorrhizal fungus in both tropical and temperate orchids. One sequence was 100% similar to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Co-existence; ITS phylogeny; Mycorrhiza; Orchidaceae; Specificity. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000100040 |
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| Arruda,Rafael; Lunardelli,Caroline; Kitagawa,Clóvis; Caires,Claudenir Simões; Teodoro,Grazielle Sales; Mourão,Fabiana Alves. |
| Mistletoe can have a major impact on the fitness of the host plant. If there is more than one species of mistletoe on the same host tree, the overall impact might be amplified. We report the occurrence of more than one species of mistletoe on the same host tree. Although it is not a rule in the field, to our knowledge, there have been no studies of this topic. In most cases, two species of mistletoe were recorded on the same host tree, although we recorded three species of mistletoe on one occasion. This demonstrates that different species of mistletoe can be compatible with the same host species. Therefore, compatibility (structural and physiological) might be an important factor for the occurrence of mistletoe. Recent studies have shown that if the... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Parasite-host relationship; Compatibility; Specificity; Parasitic plants; Red Queen hypothesis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100021 |
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| Gawler, A; Beecher, J; Brandao, J; Carroll, N; Falcao, L; Gourmelon, Michele; Masterson, B; Nunes, B; Porter, J; Rince, A; Rodrigues, R; Thorp, M; Walters, J; Meijer, W. |
| The recent implementation of the Revised Bathing Water Directive in the European Union has highlighted the need for development of effective methods to differentiate between sources of faecal contamination. It had previously been shown that amplification of 16S rRNA genes of host-specific Bacteriodales species using the HF183F and CF128F primers could be used as markers for human and bovine faecal contamination in the United States. This paper determined the sensitivity and specificity of these markers in four Atlantic Rim countries (France, Ireland, Portugal and the United Kingdom) to evaluate their usefulness in determining the origin of faecal contamination. It was shown that the HF183F marker displayed high sensitivity (80-100%) and specificity... |
| Tipo: Text |
Palavras-chave: Sensitivity; Specificity; PCR; Microbial source tracking; Bacteriodales. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-4957.pdf |
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| Registros recuperados: 22 | |
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