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Comparative leaf anatomy and micromorphology of Psychotria species (Rubiaceae) from the Atlantic Rainforest Acta Botanica
Moraes,Tarsila Maria da Silva; Rabelo,Guilherme Rodrigues; Alexandrino,Camilla Ribeiro; Silva Neto,Sebastião José da; Da Cunha,Maura.
The genus Psychotria comprises approximately 2,000 species that are mostly shrubs distributed in forests of the tropics and subtropics. Within the Rubiaceae, Psychotria is well known for its species that produce bioactive alkaloids and for its taxonomic complexity. The anatomical and micromorphological characters of the leaves of P. hoffmannseggiana, P. carthagenensis, P. deflexa, P. glaziovii, P. leiocarpa, P. racemosa, and P. vellosiana were investigated and described to understand the interspecific variation of these species, which will contribute to the systematics of the genus. Principal component analysis (PCA) and unweighted pair group method analysis (UPGMA) indicated four groups based on the presence or absence of some of the characters studied....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf anatomy; Cluster analysis; Principal component analysis; Systematic anatomy; Domatia; Leaf surface morphology.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000100021
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Univariate and multivariate statistical tools for in vitro conservation of citrus genotypes Agronomy
Carvalho, Mariane de Jesus da Silva de; Souza, Antônio da Silva; Santos, Emanuela Barbosa; Soares Filho, Walter dos Santos; Ledo, Carlos Alberto da Silva; Souza, Fernanda Vidigal Duarte.
This study aimed to evaluate the influence of the growing environment on the in vitro conservation of citrus genotypes obtained from the Active Citrus Germplasm Bank of Embrapa Cassava and Fruit. The study used multivariate statistic tools in order to improve the efficiency in the analysis of the results. Approximately 1-cm of length microcuttings from plantlets derived from ten genotypes previously cultured in vitro were inoculated in test tubes containing 20 mL of WPM culture medium supplemented with 25 g L-1 sucrose, solidified with 7 g L-1 agar and adjusted to a pH of 5.8, and maintained under three environmental conditions for 180 days. The experiment was carried out in a completely randomized design in a split-plot in the space, with 15 replications....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomia; Ciências Agrárias multivariate analysis of variance; Partial correlation; Principal component analysis; Germplasm; Citrus spp. Conservação in vitro.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26433
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Evaluation of an electronic nose system for characterization of pomegranate varieties CIGR Journal
Sanaeifar, Alireza; Mohtasebi, Seyed Saeid; Ghasemi-Varnamkhasti, Mahdi; Mohammad Shafie, Mohammad.
The electronic nose (e-nose) would simulate the human sense (smell) to identify and realize the complex aromas by employing a chemical sensors array. One of the most common sensors used in electronic nose systems are metal oxide semiconductor (MOS) sensors. In this research, a low cost e-nose system based on six metal oxide semi-conductor (MOS) sensors as a non-destructive instrument for recognition pomegranate varieties is investigated. Principal component analysis (PCA) and linear discriminant analysis (LDA) techniques are used for this purpose. The proposed e-nose has a capability of demonstrating a clear difference in aroma fingerprint of pomegranate by PCA and LDA analysis. Using LDA analysis, it is possible to identify and to categorize the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electronic nose; Linear discriminant analysis; Non-destructive; Pomegranate; Principal component analysis.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3799
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Propolis from Southwest of Parana produced by selected bees: Influence of seasonality and food supplementation on antioxidant activity and phenolic profile Anais da ABC (AABC)
CALEGARI,MATHEUS A.; PRASNIEWSKI,ANACLARA; SILVA,CLEIDIANE DA; SADO,RICARDO Y.; MAIA,FABIANA M.C.; TONIAL,LARISSA M.S.; OLDONI,TATIANE L.C..
ABSTRACT Propolis produced by selected bees Apis mellifera were collected from March to June of 2013 and in March of 2015 and analyzed in order to evaluate the influence of climate, colony of origin, and food supplementation of colonies on the content of total phenolic and flavonoid by chromatographic analysis and antioxidant activity by radical scavenging of 2,2-diphenyl-1-picrylhydrazyl hydrate (DPPH) and 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) methods. The Principal Component Analysis (PCA) was carried out with propolis collected in 2013 and two clusters were formed. Propolis produced in the months of March and April showed a higher content of total phenolic compounds (TPC) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apis mellifera; Ethanolic extract; Polyphenols; Principal component analysis.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100045
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Cycle, physicochemical characterization and climatic adaptation of a white hybrid grape on different rootstocks Bragantia
Mattar,Gabriel Stefanini; Modesto,Lenon Romano; Hernandes,José Luiz; Tecchio,Marco Antonio; Moura,Mara Fernandes.
ABSTRACT This study evaluated the cycle duration, physicochemical characteristics of fruits and climatic adaptation of the ‘SR 501-17’ hybrid grape grafted on four rootstocks for the production of white wine. We tested four rootstocks, ‘IAC 766 Campinas’, ‘IAC 572 Jales’, ‘IAC 571-6 Jundiaí’ and ‘IAC 313 Tropical’, planted in two climatic regions, Cfa and Aw, in the state of São Paulo, Brazil in the cultivation years 2014 and 2015. Cycle duration, production, cluster weight, number of berries per bunch, content of soluble solids, titratable acidity, a maturation index and the weight, length and width of berries were evaluated. A principal component analysis characterized the cultivar for both climatic regions and years. The rootstock did not influence the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canopy/rootstock; Climate; Principal component analysis; Vitis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300470
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Organography of greenhouse and field accessions of wild Arachisspecies (section Arachis) Bragantia
Veiga,Renato Ferraz de Arruda; Faria,Leonardo de Grazia; Valls,José Francisco Montenegro; Fávero,Alessandra Pereira.
ABSTRACT Peanut or groundnut (Arachis hypogaea L.) is a globally important oilseed crop, with important nutritional qualities, and a rich source of amino acids and protein. Another 80 species have been described in the genus Arachis, 64 of which are found in Brazil, and even though their morphology and agronomic traits remain largely unknown, they have been cultivated for forage and for landscaping and have great potential for breeding with cultivated peanut. Thus, the morphological characterization of wild Arachis species is essential for their conservation and use. In this study, we present a morphological and agronomic characterization of 29 diploid accessions of eleven wild Arachis species and one of the tetraploid A. monticola (section Arachis) with A...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Peanut; Morphological characterization; Descriptors; Principal component analysis.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100083
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Chemical quality of bottled mineral waters from markets of Curitiba-PR-Brazil BABT
Santos,Éder José dos; Oliveira Junior,Dasio Roberto de; Hermann,Amanda Beatriz; Sturgeon,Ralph Edward.
ABSTRACT Twenty-seven bottled mineral waters from local markets in Curitiba, State of Paraná, Brazil were analyzed for a number of constituents, including: pH, conductivity, total dissolved solids, hardness, HCO3 - and CO 3 2-, as well as Ca2+, Mg2+, Na+, K+, NH4 + , F-, Cl-, NO3 -, NO2 - and SO4 2- by ion chromatography (IC); Al, Ba, Cd, Cr, Cu, Fe, Li, Mn, Ni, Sr, V and Zn by inductively coupled plasma optical emission spectrometry (ICP OES); Hg by cold vapor generation-ICP OES and As, Pb, Sb and Se by ICP-mass spectrometry (ICP-MS). The obtained limits of quantitation (LOQ) were adequate for the determination of all analytes using the various analytical techniques. Results for the analysis of AccuStandard certified reference materials QCS-01-5,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bottled mineral waters; Elemental composition; Chemical quality; Principal component analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100513
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Phenotypic Characterization and Genetic Diversity of Sugarcane Varieties Cultivated in Northern Karnataka of India based on Principal Component and Cluster Analyses BABT
Tawadare,Rakesh; Thangadurai,Devarajan; Khandagave,Rayappa Bharamappa; Mundaragi,Abhishek; Sangeetha,Jeyabalan.
Abstract: Sugarcane is a major commercial crop grown in India and across the world. Hence, several elite varieties have been developed now-a-days to overcome many obstacles including abiotic stresses and diseases. The present study was undertaken to screen genetic variation among twenty four sugarcane varieties that are commonly cultivated across Northern Karnataka, India with reference to physicochemical characters. Experiment was conducted in triplicate following randomized complete block design (RCBD) at S. Nijalingappa Sugar Institute, Belagavi, Karnataka, India during February 2016-17. Physiological parameters such as internode length, stalk height, plant height, stalk girth, number of internodes, single cane weight, single cane volume of juice, cane...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physicochemical characters; Principal component analysis; Agglomerative hierarchical clustering; Sugarcane..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100215
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The vascular flora of the cerrado in Emas National Park (Central Brazil): a savanna flora summarized BABT
Batalha,Marco Antônio; Martins,Fernando Roberto.
The Brazilian cerrado may be divided in two main phytogeographic sectors: one characterized by Piptocarpha rotundifolia, in which the Emas National Park (ENP) is located, and other characterized by Curatella americana. We carried out a floristic survey in ENP, which allowed an assessment of the taxonomic composition, taxa size, and similarity with other sites for the ENP's vascular flora. We compared the ENP's flora with southeastern outlying cerrado sites, also in the Piptocarpha sector, and with general floristic patterns in the cerrado vegetation. The distribution of species per family in ENP was significantly different from that obtained for each component of the general cerrado flora. The herbaceous component was characterized by an overproportion of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Floristics; Phytogeography; Principal component analysis; Savanna.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200012
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Long-term social recognition memory in adult male rats: factor analysis of the social and non-social behaviors BJMBR
Moura,P.J.; Meirelles,S.T.; Xavier,G.F..
A modified version of the intruder-resident paradigm was used to investigate if social recognition memory lasts at least 24 h. One hundred and forty-six adult male Wistar rats were used. Independent groups of rats were exposed to an intruder for 0.083, 0.5, 2, 24, or 168 h and tested 24 h after the first encounter with the familiar or a different conspecific. Factor analysis was employed to identify associations between behaviors and treatments. Resident rats exhibited a 24-h social recognition memory, as indicated by a 3- to 5-fold decrease in social behaviors in the second encounter with the same conspecific compared to those observed for a different conspecific, when the duration of the first encounter was 2 h or longer. It was possible to distinguish...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agonistic behavior; Long-term social recognition memory; Non-social behavior; Principal component analysis; Social behavior; Social investigation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000700009
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Benchmarking pathway interaction network for colorectal cancer to identify dysregulated pathways BJMBR
Wang,Q.; Shi,C.-J.; Lv,S.-H..
Different pathways act synergistically to participate in many biological processes. Thus, the purpose of our study was to extract dysregulated pathways to investigate the pathogenesis of colorectal cancer (CRC) based on the functional dependency among pathways. Protein-protein interaction (PPI) information and pathway data were retrieved from STRING and Reactome databases, respectively. After genes were aligned to the pathways, each pathway activity was calculated using the principal component analysis (PCA) method, and the seed pathway was discovered. Subsequently, we constructed the pathway interaction network (PIN), where each node represented a biological pathway based on gene expression profile, PPI data, as well as pathways. Dysregulated pathways...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pathway interaction network; Colorectal cancer; Dysregulated pathways; Principal component analysis; Protein-protein interaction.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000500602
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Combining Multivariate Analysis and Pollen Count to Classify Honey Samples Accordingly to Different Botanical Origins Chilean J. Agric. Res.
Corbella,Eduardo; Cozzolino,Daniel.
This study reports the combination of multivariate techniques and pollen count analysis to classify honey samples accordingly to botanical sources, in samples from Uruguay. Honey samples from different botanical origins, namely Eucalyptus spp. (n = 10), Lotus spp. (n = 12), Salix spp. (n = 5), “mil flores” (Myrtaceae spp.) (n = 12) and coronilla (Scutia buxifolia Reissek) (n = 10) were analysed using Melissopalynology (pollen identification). Principal component analysis (PCA) and linear discriminant analysis (LDA) were used to classify the honey samples accordingly to their botanical origin based on a pollen count. Honey samples of higher percentage (> 70%) of Eucalyptus, Lotus and Scutia pollen were 100% correctly classified, whilst samples from...
Tipo: Journal article Palavras-chave: Honey; Uruguay; Principal component analysis; Linear discriminant analysis; Pollen analysis.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100010
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Development, characterization and chemometric analysis of a gluten-free food bar containing whole flour from a new cultivar of amaranth Ciência e Agrotecnologia
Pagamunici,Lilian Maria; Souza,Aloisio Henrique Pereira; Gohara,Aline Kirie; Souza,Nilson Evelázio; Gomes,Sandra Terezinha Marques; Matsushita,Makoto.
Food bars are consumed heavily, especially because of their practicality; however they cannot be ingested by celiac patients and present low contents of essential nutrients. The goal of this study was the development and physical-chemical, nutritional and sensory evaluation of a gluten-free food bar containing amaranth and linseed. Gluten fractions were not detected in the food bar formulations. Crude protein and total lipid contents ranged from 68.32 to 76.60 and 74.56 to 82.06 g kg-1 of food, respectively. The polyunsaturated/saturated and n-6:n-3 fatty acid ratios ranged from 0.45:1 to 0.55:1 and 1.44:1 to 2.50:1, respectively. Calcium, magnesium, copper, iron, manganese and zinc were the principal minerals. Application of multivariate analysis enabled...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Principal component analysis; Pseudo-cereals; Linseed; Fatty acids.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000300007
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Nutritional and bioactive compounds of adzuki beans cultivars using chemometric approach Ciência e Agrotecnologia
Gohara,Aline Kirie; Souza,Aloisio Henrique Pereira de; Gomes,Sandra Terezinha Marques; Souza,Nilson Evelázio de; Visentainer,Jesuí Vergílio; Matsushita,Makoto.
ABSTRACT Azuki beans are small red grains rich in several essential nutrients used in traditional dishes in Asia that, nowadays present many applications around the world. This work aimed at evaluating angularis and niponensis cultivars from south region of Brazil. Both cultivars presented proximal composition similar to literature and the majority fatty acids were 18:2n-6, 16:0 and 18:3n-3. All samples showed polyunsatured fatty acids prevalence and nutritional indices and ratios considered adequate for biological system maintenance of a healthy organism. The grains presented significant contents of tocopherols and vitamin E activity, resulting in a high contribution to the dietary reference intake. Significant contents of iron, manganese and zinc were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vigna angularis; Alpha-linolenic; Principal component analysis; Vitamin E; Antioxidant activity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000100104
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Snap bean production using sunflowers as living trellises in the central high valleys of Mexico Ciencia e Investigación Agraria
Morales-Rosales,Edgar Jesús; Franco-Mora,Omar; González-Huerta,Andrés.
The aim of this study was to assess growth, net assimilation rate, biomass production and pod yield in two snap bean cultivars sown in monoculture and combined with two sunflower cultivars at three localities in the State of Mexico, Mexico. The six treatments were evaluated in a 2 x 3 factorial experiment in a randomized complete block design with four replications. When F values were significant, the least significant difference test at the 5% level of significance was used. The principal component analysis was also used to study the interrelationship among the six treatments and seven variables. The results observed in the biplot indicated that the largest original variation in the data was adequately represented in the first two principal components...
Tipo: Journal article Palavras-chave: Phaseoulus vulgaris; Helianthus annuus; Multiple crops; Net assimilation rate; Principal component analysis.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100005
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Usefulness of near infrared reflectance (NIR) spectroscopy and chemometrics to discriminate between fishmeal, meat meal and soya meal samples Ciencia e Investigación Agraria
Cozzolino,Daniel; Restaino,Ernesto; La Manna,Alejandro; Fernandez,Enrique; Fassio,Alberto.
Near infrared reflectance (NIR) spectroscopy was used in combination with chemometrics to discriminate between fishmeal, meat meal and soya meal samples. Samples were obtained from commercial feed miles and scanned in the NIR region (1100 - 2500 nm) in a monochromatic instrument in reflectance mode. Principal component analysis (PCA) and linear discriminant analysis were used to classify samples based on their NIR spectra. Full cross-validation was used in the development of classification models. Partial least squares-discriminant analysis (PLS-DA) correctly classified 85.7% of the fishmeal samples and 100% of the meat meal and soya meal samples. These results demonstrate the usefulness of NIR spectra combined with chemometrics as an objective and rapid...
Tipo: Journal article Palavras-chave: Fishmeal; Glycine max; Meat meal; Near infrared; Principal component analysis; Spectroscopy; Soya meal.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200005
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The identification of outstanding potato cultivars using multivariate methods Ciencia e Investigación Agraria
Pérez,Delfina de J; González,Andrés; Sahagún,Jaime; Vázquez,Luis M; Rivera,Antonio; Franco,Omar; Domínguez,Aurelio.
The evaluation and selection of potato (Solanum tuberosum) cultivars for commercial production in the high valleys of Mexico are important for plant breeding, seed production, and the generation of technology. In this work, ten potato cultivars from five different environments in México were evaluated to determine the proportion of genetic variation contained within each. The potatoes were sown in a completely randomized complete block design. Heritability was determined to be between 53% and 83%, suggesting that there is genetic variability among the potato cultivars that might be agronomically important. According to the additive main effects and multiplicative interaction (AMMI) model, the highest tuber yields were obtained at the locality named...
Tipo: Journal article Palavras-chave: AMMI model; Cluster analysis; Principal component analysis; Solanum tuberosum.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000300006
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Multivariate study and regression analysis of gluten-free granola Ciênc. Tecnol. Aliment.
Pagamunici,Lilian Maria; Souza,Aloisio Henrique Pereira de; Gohara,Aline Kirie; Silvestre,Alline Aparecida Freitas; Visentainer,Jesuí Vergílio; Souza,Nilson Evelázio de; Gomes,Sandra Terezinha Marques; Matsushita,Makoto.
This study developed a gluten-free granola and evaluated it during storage with the application of multivariate and regression analysis of the sensory and instrumental parameters. The physicochemical, sensory, and nutritional characteristics of a product containing quinoa, amaranth and linseed were evaluated. The crude protein and lipid contents ranged from 97.49 and 122.72 g kg-1 of food, respectively. The polyunsaturated/saturated, and n-6:n-3 fatty acid ratios ranged from 2.82 and 2.59:1, respectively. Granola had the best alpha-linolenic acid content, nutritional indices in the lipid fraction, and mineral content. There were good hygienic and sanitary conditions during storage; probably due to the low water activity of the formulation, which...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cereal; Pseudo-cereals; Food science; Principal component analysis; Fatty acids.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000100019
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Quality pattern evaluation of frozen soursop pulps: an assessment based on chemical composition and chemometric analysis Ciênc. Tecnol. Aliment.
NASCIMENTO,Madson Moreira; JESUS,Raildo Mota de; SANTOS,Herick Macedo; SILVA JUNIOR,André Luiz Sampaio da; CAMPOS,Nícolas Mateus Cosme Oliveira; SILVA,Erik Galvão Paranhos da; LÔBO,Ivon Pinheiro.
Abstract In the present study, the physicochemical properties and mineral composition of commercially-frozen soursop pulps from the southern region of the state of Bahia, Brazil, were evaluated. The physicochemical parameters such as soluble solids (°Brix), acidity and pH were determined according to reference methodologies. For mineral composition evaluation, samples were digested in a closed microwave system and the elements K, P, S, Ca, Mg, Fe, Cu, Zn, and Mn were quantified through inductively coupled plasma optical emission spectrometry (ICP OES). Soluble solids content ranged from 4.77 to 15.37 °Brix among the different brands of analyzed frozen pulps. Titratable acidity (equivalent to citric acid) and pH ranged from 0.49 to 1.00 and 3.61 to 4.57,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annona muricata L.; Frozen soursop pulp; Physicochemical properties; Essential elements; Multivariate statistics; Principal component analysis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005000302
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Sensory and physico-chemical characteristics of desserts prepared with egg products processed by freeze and spray drying Ciênc. Tecnol. Aliment.
Jesús,Marcelo Nunes de; Zanqui,Ana Beatriz; Valderrama,Patrícia; Tanamati,Augusto; Maruyama,Swami Arêa; Souza,Nilson Evelázio de; Matsushita,Makoto.
In this work, three freeze-dried (FD) egg products (whole egg (WE), egg yolk (EY) and egg white (EW)) were obtained and the acceptability of confections prepared with each was evaluated. Sensory analyses for confections were performed by hedonic testing with fifty panelists in each evaluation. The studied confections were: Condensed Milk Pudding (P), Quindim (Q) and Meringue (M). The results obtained for confections made with FD egg products were compared with the achieved through other formulations of the same desserts made with fresh (F) or spray-dried (SD) egg products. The sensory analysis results for confections made with FD egg products showed good acceptance by panelists. A principal component analysis of the sensory evaluation data was carried out...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Principal component analysis; Freeze-dried eggs; Confections; Sensory analysis; Egg products.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000300025
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