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Nicolas Sanson and his Map: The Course of the Amazon River Acta Amazonica
Cintra,Jorge Pimentel; Oliveira,Rafael Henrique de.
One of the first scientific maps of the Amazon region, The Course of the Amazon River (Le Cours de La Rivière des Amazones), was constructed by Nicolas Sanson, a French cartographer of the seventeenth century, and served as the prototype for many others. The evaluation of this chart, until now, has been that it is a very defective map, a sketch based on a historical account, according to the opinion of La Condamine. Thus, the aim of the present work was to prove that the map of the Amazon River traced by Nicolas Sanson is a scientific work, a map that presents precise geographic coordinates considering its time, shows a well-determined prime meridian, and also employs a creative methodology to deduce longitudes from latitudes and distances that had been...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Historical Cartography; Longitude; Accuracy; La Condamine; Pagan.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000300008
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Repeatability of biometric and fruit and seed yield traits of sacha inchi Acta Amazonica
VALENTE,Mágno Sávio Ferreira; LOPES,Maria Teresa Gomes; CHAVES,Francisco Célio Maia; OLIVEIRA,Ariane Mendes; FREITAS,Diego Rodrigo Bilby de.
ABSTRACT Repeatability allows an estimation of the number of evaluations needed to optimize the selection of superior genotypes, with consequent effects on the research costs in terms of financial and human resources. The objective of this study was to estimate the coefficient of repeatability of biometric and yield traits, related to fruits and seeds of sacha inchi (Plukenetia volubilis), and to define the number of evaluations required for an efficient selection and evaluation of genotypes of the species. A total of 37 non-domesticated accessions were evaluated for 19 months in a randomized block design with 5 replications and 2 plants per plot. The total number of fruits, total number of seeds, total fruit weight, mean fruit weight, and number of seeds...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Breeding; Accuracy; Selection efficiency; Plukenetia volubilis L..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000300195
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Rank-ordering coefficients of variation for popping expansion - doi: 10.4025/actasciagron.v33i3.11911 Agronomy
Arnhold, Emmanuel; Universidade Federal do Goiás (UFG); Milani, Klayton Flávio; Universidade Estatual de Maringá (UEM).
The coefficient of variation (CV) has been the most important statistic to determine the precision of experimental errors, but an even classification for guiding popcorn breeders is still lacking for popping expansion. The normality of data from 50 CVs was tested through the Shapiro-Wilk test, and the mean (m), median, standard deviation (SD), maximum and minimum values, asymmetry and kurtosis were all determined using the momentum method. The CVs were ranked as low [CV &le; (m - 1 SD)], moderate [(m - 1 SD) < CV &le; (m + 1 SD)], high [(m + 1 SD) < CV &le; (m + 2 SD)] and very high [CV > (m + 2 SD)]. In summary, these data were close to the normality because the slight and flattened curve was skewed to the right. The CV’s mean was...
Palavras-chave: Zea mays; Dispersion measurement; Genetic improvement; Precision; Accuracy Zea mays; Dispersion measurement; Genetic improvement; Precision; Accuracy.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/11911
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Comparison of whole genome prediction accuracy across generations using parametric and semi parametric methods Animal Sciences
Atefi, Abbas; Shadparvar, Abdol Ahad; Ghavi Hossein-Zadeh, Navid.
Accuracy of genomic prediction was compared using three parametric and semi parametric methods, including BayesA, Bayesian LASSO and Reproducing kernel Hilbert spaces regression under various levels of heritability (0.15, 0.3 and 0.45), different number of markers (500, 750 and 1000) and generation intervals of validating set. A historical population of 1000 individuals with equal sex ratio was simulated for 100 generations at constant size. It followed by 100 extra generations of gradually reducing size down to 500 individuals in generation 200. Individuals of generation 200 were mated randomly for 10 more generations applying litter size of 5 to expand the historical generation. Finally, 50 males and 500 females chosen from generation 210 were randomly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Accuracy; Genomic; Semi parametric methods; Genetic architecture.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/32023
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Fontes de erros na mensuração do comprimento e peso de larvas de peixes - DOI: 10.4025/actascibiolsci.v30i3.393 Biological Sciences
Pedreira, Marcelo Mattos; UFVJM; Santos, José Claudio Epaminondas dos; CODEVASF; Sampaio, Edson Vieira; CODEVASF; Silva, Janaina de Lima; UFVJM; Ferreira, Felipe Nilvan; UFVJM.
Trabalhos com larvas de peixes, sejam de cultivo ou ecológicos invariavelmente empregam o comprimento e o peso como parâmetros. Assim sendo, este experimento foi realizado com larvas de Lophiosilurus alexandri pacamã objetivando determinar algumas fontes de erros amostrais na medição do tamanho e do peso de larvas de peixes. Avaliou-se cinco possíveis fontes de erros. O primeiro foi o erro na medida dos comprimentos total e padrão, devido a acuidade de medição de dois observadores. O segundo, foi o erro na medida dos comprimentos total e padrão, devido ao encolhimento proporcionado pelo fixador formalina a 10%. O terceiro foi o erro devido a duas formas de secagem das larvas na obtenção da biomassa. O quarto experimento foi sobre a influência do tamanho e...
Palavras-chave: 2.00.00.00-6 Ciências Biológicas amostragem; Exatidão; Larvas de peixes; Lophiosilurus alexandri; Medidas; Precisão sampling; Accuracy; Fish larvae; Measurements; Precision.
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/393
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Transient elastography and APRI score: looking at false positives and false negatives. Diagnostic performance and association to fibrosis staging in chronic hepatitis C BJMBR
Mendes,L.C.; Ferreira,P.A.; Miotto,N.; Zanaga,L.; Gonçales,E.; Lazarini,M.S.; Gonçales Júnior,F.L.; Stucchi,R.S.B.; Vigani,A.G..
Although long regarded as the gold standard for liver fibrosis staging in chronic hepatitis C (CHC), liver biopsy (LB) implies both the risk of an invasive procedure and significant variability. The aim of this study was to evaluate the diagnostic performance for transient elastography (TE) and aspartate aminotransferase to platelet index (APRI) used alone and in combination compared to liver biopsy and to analyze false positive/negative results. Patients with CHC, and no previous clinical diagnosis of cirrhosis were enrolled to undergo liver biopsy, TE and APRI. A total of 182 adult patients with a median age of 55 years and median body mass index of 26.71 kg/m2 were analyzed. On LB, 56% of patients had significant levels of fibrosis (METAVIR F≥2) and 28%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Liver biopsy; Noninvasive tests; APRI; Transient elastography; Accuracy; False results.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000900702
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A combined enrichment/polymerase chain reaction based method for the routine screening of Streptococcus agalactiae in pregnant women BJM
Munari,F.M.; De-Paris,F.; Salton,G.D.; Lora,P.S; Giovanella,P; Machado,A.B.M.P; Laybauer,L.S.; Oliveira,K.R.P.; Ferri,C; Silveira,J.L.S.; Laurino,C.C.F.C; Xavier,R.M.; Barth,A.L; Echeverrigaray,S; Laurino,J.P..
Group B Streptococcus (GBS) is the most common cause of life-threatening infection in neonates. Guidelines from CDC recommend universal screening of pregnant women for rectovaginal GBS colonization. The objective of this study was to compare the performance of a combined enrichment/PCR based method targeting the atr gene in relation to culture using enrichment with selective broth medium (standard method) to identify the presence of GBS in pregnant women. Rectovaginal GBS samples from women at ≥36 weeks of pregnancy were obtained with a swab and analyzed by the two methods. A total of 89 samples were evaluated. The prevalence of positive results for GBS detection was considerable higher when assessed by the combined enrichment/PCR method than with the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Streptococcus agalactiae; Group B Streptococcus; Atr gene; Screening test; Accuracy.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100029
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Evaluation of turbidity measuring instruments using statistical process control Ciência e Agrotecnologia
Souza,Lucas de Paula Ferreira; Campos,Cláudio Milton Montenegro.
The quality management system (QMS) and environmental management system (EMS) are currently being widely developed in laboratories, and have contributed to significant improvements in measurement management processes and client opinion. The purpose of this work is to establish appropriate methodologies for assessing the turbidity measurement that guarantee the quality of the results concerning precision and accuracy and also to test the service performance of the Water Analysis Laboratory of the Engineering Department (LAADEG) of Federal University of Lavras (UFLA). The research assessed two bench turbidimeters "A and B" through a statistical process capability study, analyzing the potential capability indexes (Cp) and performance capability (Cpk). We...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Precision; Accuracy; Testing; Quality management.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000400006
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Estimated live weight of growing Pêga breed donkeys Ciência Rural
Moreira,Camilla Garcia; Balieiro,Júlio César de Carvalho; Menezes,Madalena Lima; Ribeiro,Gabriela; Nascimento,Olivia Carmen de Araújo; Brandi,Roberta Ariboni.
ABSTRACT: The equations available in the literature to estimate the body weight (BW) of Pêga breed donkeys were evaluated using 25 animals aged 0-6 months and it was proposed an equation for BW prediction. For the measurement of the thoracic perimeter (TP) and for weighing the animals using the weighing tape, the animals were positioned in a forced station on a steep slope. An electronic scale was used for the determination of the BW. Accuracy of linear and nonlinear equations described in the literature was tested for BW prediction based on the animals’ TP, followed by the comparison of these equations with the equation developed in the present study for BW prediction of Pêga breed donkeys. A difference was noted (P<0.001) between the weights obtained...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Accuracy; Asinine; Equations; Estimation; Growth.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000651
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Evaluating uncertainty in measurements of fish shoal aggregate backscattering cross-section caused by small shoal size relative to beam width ArchiMer
Diner, Noel.
The aggregate backscattering cross-section, sag, is the sum of backscattering cross-sections of all fish in a shoal. It is a basic acoustical parameter used for shoal description and biomass estimation. Simulations were undertaken for evaluating the impact of horizontal dimension, density, depth and beam width on measurements of sag for shoals with constant abundance. The important factor determining measurement bias is the ratio of shoal size expressed as along cross-section length relative to along ship beam width at mean shoal depth. The results show that 10 log10(sag) is underestimated by about 8 dB for a 5 m long shoal located at 200 m depth if detected by a 7? beam. A formula for correcting sag estimates for shoal sizes bigger than 1.3 times the beam...
Tipo: Text Palavras-chave: Shoal dimension; Shoal energy; Single beam echosounder; Acoustic measurements; Accuracy; Bias.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2583.pdf
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A mussel tissue certified reference material for multiple phycotoxins. Part 1: design and preparation ArchiMer
Mccarron, Pearse; Emteborg, Hakan; Nulty, Ciara; Rundberget, Thomas; Loader, Jared I.; Teipel, Katharina; Miles, Christopher O.; Quilliam, Michael A.; Hess, Philipp.
The development of multi-analyte methods for lipophilic shellfish toxins based on liquid chromatography-mass spectrometry permits rapid screening and analysis of samples for a wide variety of toxins in a single run. Validated methods and appropriate certified reference materials (CRMs) are required to ensure accuracy of results. CRMs are essential for accurate instrument calibration, for assessing the complete analytical method from sample extraction to data analysis and for verifying trueness. However, CRMs have hitherto only been available for single toxin groups. Production of a CRM containing six major toxin groups was achieved through an international collaboration. Preparation of this material, CRM-FDMT1, drew on information from earlier studies as...
Tipo: Text Palavras-chave: CRM-FDMT1; Certified reference material; Shellfish toxins; Phycotoxins; Accuracy; Precision; Liquid chromatography-mass spectrometry.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00037/14826/12237.pdf
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Monitoring Marine Habitats With Photogrammetry: A Cost-Effective, Accurate, Precise and High-Resolution Reconstruction Method ArchiMer
Marre, Guilhem; Holon, Florian; Luque, Sandra; Boissery, Pierre; Deter, Julie.
Underwater photogrammetry has been increasingly used to study and monitor the three-dimensional characteristics of marine habitats, despite a lack of knowledge on the quality and reliability of the reconstructions. More particularly, little attention has been paid to exploring and estimating the relative contribution of multiple acquisition parameters on the model resolution (distance between neighbor vertices), accuracy (closeness to true positions/measures) and precision (variability of positions/measures). On the other hand, some studies used expensive or cumbersome camera systems that can restrict the number of users of this technology for the monitoring of marine habitats. This study aimed at developing a simple and cost-effective protocol able to...
Tipo: Text Palavras-chave: Underwater photogrammetry; Resolution; Accuracy; Precision; 3D habitat mapping; Marine ecology.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00501/61272/64848.pdf
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Accuracy Assessment of Coastal Topography derived from UAV Images ArchiMer
Long, N.; Millescamps, B.; Pouget, F.; Dumon, A.; Lachaussee, N.; Bertin, X..
To monitor coastal environments, Unmanned Aerial Vehicle (UAV) is a low-cost and easy to use solution to enable data acquisition with high temporal frequency and spatial resolution. Compared to Light Detection And Ranging (LiDAR) or Terrestrial Laser Scanning (TLS), this solution produces Digital Surface Model (DSM) with a similar accuracy. To evaluate the DSM accuracy on a coastal environment, a campaign was carried out with a flying wing (eBee) combined with a digital camera. Using the Photoscan software and the photogrammetry process (Structure From Motion algorithm), a DSM and an orthomosaic were produced. Compared to GNSS surveys, the DSM accuracy is estimated. Two parameters are tested: the influence of the methodology (number and distribution of...
Tipo: Text Palavras-chave: Digital Surface Model; Coastal monitoring; UAV photogrammetry; Accuracy.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00668/78011/80248.pdf
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Measurement of the isotopic composition of dissolved iron in the open ocean ArchiMer
Lacan, F.; Radic, A.; Jeandel, C.; Poitrasson, F.; Sarthou, Geraldine; Pradoux, C.; Freydier, R..
This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflow resin and purified using an AG1x4 anion exchange resin. The isotopic ratios are measured with a MC-ICPMS Neptune, coupled with a desolvator (Aridus II), using a Fe-57-Fe-58 double spike mass bias correction. Measurement precision (0.13%, 2SD) allows resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from delta Fe-57 = -0.19 to +0.32 parts per thousand). Isotopically light iron found in...
Tipo: Text Palavras-chave: MC ICP MS; Chelating resin; Southern ocean; Fractionation; Seawater; Earth; Separation; Accuracy; Pacific; FE(III).
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00202/31374/29781.pdf
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Sequential process to choose efficient sampling design based on partial prior information data and simulations ArchiMer
Kermorvant, Claire; Coube, Sébastien; D’amico, Frank; Bru, Noëlle; Caill-milly, Nathalie.
Issues on sampling procedure definition led numerous study results to be biased and object of controversy. Choosing relevant sampling design and number of samples is a difficult task when wanted to set up or optimize a survey. The survey design choice is very important to avoid bias and increase the survey cost-efficiency. It can have a strong effect on the sample size needed to achieve some targeted accuracy on results. And on the final cost of the procedure. The sequential process we expose here melt design based and model based sampling theories. Its objectives is helping practitioners defining a sampling design and a number of samples for their survey when inference to the whole population is wanted. The main idea is to mathematically reconstruct the...
Tipo: Text Palavras-chave: Accuracy; Cost-effectiveness; Survey; Simulations; Survey optimization; Virtual ecology.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00619/73140/72306.pdf
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Estimating soybean crop areas using spectral-temporal surfaces derived from MODIS images in Mato Grosso, Brazil PAB
Epiphanio,Rui Dalla Valle; Formaggio,Antonio Roberto; Rudorff,Bernardo Friedrich Theodor; Maeda,Eduardo Eiji; Luiz,Alfredo José Barreto.
The objective of this work was to evaluate the application of the spectral-temporal response surface (STRS) classification method on Moderate Resolution Imaging Spectroradiometer (MODIS, 250 m) sensor images in order to estimate soybean areas in Mato Grosso state, Brazil. The classification was carried out using the maximum likelihood algorithm (MLA) adapted to the STRS method. Thirty segments of 30x30 km were chosen along the main agricultural regions of Mato Grosso state, using data from the summer season of 2005/2006 (from October to March), and were mapped based on fieldwork data, TM/Landsat-5 and CCD/CBERS-2 images. Five thematic classes were considered: Soybean, Forest, Cerrado, Pasture and Bare Soil. The classification by the STRS method was done...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Accuracy; Agricultural statistics; Classification; Remote sensing; Thematic map.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000100010
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Test-day or 305-day milk yield for genetic evaluation of Gir cattle PAB
Pereira,Rodrigo Junqueira; Ayres,Denise Rocha; Santana Junior,Mário Luiz; Faro,Lenira El; Vercesi Filho,Aníbal Eugênio; Albuquerque,Lucia Galvão de.
Abstract: The objective of this work was to compare genetic evaluations of milk yield in the Gir breed, in terms of breeding values and their accuracy, using a random regression model applied to test-day records or the traditional model (TM) applied to estimates of 305-day milk yield, as well as to predict genetic trends for parameters of interest. A total of 10,576 first lactations, corresponding to 81,135 test-day (TD) records, were used. Rank correlations between the breeding values (EBVs) predicted with the two models were 0.96. The percentage of animals selected in common was 67 or 82%, respectively, when 1 or 5% of bulls were chosen, according to EBVs from random regression model (RRM) or TM genetic evaluations. Average gains in accuracy of 2.7, 3.0,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Accuracy; Persistency; Random regression; Rank correlation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104305
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Genetic evaluation and genetic gains with the selection for Jatropha curcas populations PFB - Pesquisa Florestal Brasileira
Juhász, Ana Cristina Pinto; Morais, Danielle de Lourdes Batista; Soares, Bruno Oliveira; Pimenta, Samy; Rabello, Hudson de Oliveira; Resende, Marcos Deon Vilela de.
This work aimed at estimating genetic parameters from the vegetative stage in five populations from Jatropha curcas L. The half sib progenies were cultivated at Biojan farm, in Janaúba, MG. Plant height, stem diameter, number of branches and crown projection were assessed in all plants at three and six months old. In population 2, there was no genetic variability for all traits evaluated. The genetic gains estimated with the selection from the ten best individuals in other populations were 4% to 8% for plant height (population 1 and 4), 5% to 7% for stem diameter (population 1 and 5), 14% to 25% for the number or branches (population 3 and 5) and 9% for crown projections in population 4. According to the results obtained from this study, these populations...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Variability; Heritability; Accuracy; Genetic gain. Variabilidade; Herdabilidade; Acurácia; Ganho genético..
Ano: 2010 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/83
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Economics of Increased Beef Grader Accuracy AgEcon
Ibarburu, Maro A.; Lawrence, John D.; Busby, Darrell.
Carcass data from more than 38,000 cattle was used to compare the called and measured yield grade in two different periods: before and after the slaughter plant incorporated another grader in the line to improve grading accuracy. The study shows that the graders accuracy significantly increased. The higher accuracy affected all yield grades, but most notably resulted in more called yield grade 4 and 5 carcasses. This analysis will develop insight of what will be the effect of instrument grading that will be more accurate than previously called grades.The results are expressed as the conditional distribution of the called yield grade for a given value of the measured yield grade. The pricing grid currently used by the industry was used to analyze the effect...
Tipo: Conference Paper or Presentation Palavras-chave: Cattle; Carcass grading; Accuracy; Economics of grading.
Ano: 2007 URL: http://purl.umn.edu/37558
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Impact of embryo transfer phenotypic records on large-scale beef cattle genetic evaluations R. Bras. Zootec.
Junqueira,Vinícius Silva; Lopes,Paulo Sávio; Resende,Marcos Deon Vilela de; Silva,Fabyano Fonseca e; Lourenço,Daniela Andressa Lino; Yokoo,Marcos Jun Iti; Cardoso,Fernando Flores.
ABSTRACT We aimed to evaluate the impact of using embryo transfer (ET) information on weaning weight estimated breeding values (EBV) and its accuracy. Data from Hereford and Braford cattle, raised under extensive conditions in Southern Brazil, were used. A model that included ET information in addition to maternal (genetic and permanent environmental) effects as a function of foster dams was compared to a model without ET information. Accuracy of both bulls and calves increased due to inclusion of ET records in 0.04 and 0.12 points, respectively. In general, the inclusion of ET records provided a greater amount of phenotypic variance and most accurate EBV for sires and progeny. The results obtained in this study encourage the use of ET phenotypic records...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Accuracy; Assisted reproduction; Foster dam; Genetic groups.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100405
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