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Accuracy, precision and robustness of different methods to obtain samples from silages in fermentation studies R. Bras. Zootec.
Gomes,Rodrigo da Costa; Meyer,Paula Marques; Castro,Ari Luiz de; Saran Netto,Arlindo; Rodrigues,Paulo Henrique Mazza.
The objective of this study was to evaluate accuracy, precision and robustness of two methods to obtain silage samples, in comparison with extraction of liquor by manual screw-press. Wet brewery residue alone or combined with soybean hulls and citrus pulp were ensiled in laboratory silos. Liquor was extracted by a manual screw-press and a 2-mL aliquot was fixed with 0.4 mL formic acid. Two 10-g silage samples from each silo were diluted in 20 mL deionized water or 17% formic acid solution (alternative methods). Aliquots obtained by the three methods were used to determine the silage contents of fermentation end-products. The accuracy of the alternative methods was evaluated by comparing mean bias of estimates obtained by manual screw-press and by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bias; Ethanol; Formic acid; Organic acids; Wet brewery residue.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600008
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Aislamiento y caracterización bioquímica de metabolitos producidos por rizobacterias que solubilizan fosfato. Colegio de Postgraduados
Paredes Mendoza, Marianela.
El empleo de bacterias solubilizadoras de fosfato (BSP) para la solubilización de distintas rocas fosfatadas y de otras fuentes de fósforo es una alternativa para incrementar la cantidad de P disponible para las plantas. Se aislaron 147 BSP de la raíz y rizoplano de diferentes plantas cultivadas. El medio de cultivo denominado Medio Mínimo para Solubilización de Fosfato Colegio de Postgraduados con MgCl (MMSFCP-Mg) fue el más eficiente, debido a que en medio sólido se observaron halos de solubilización de hasta 3.8 cm a los catorce días, y en medio líquido se determinaron hasta 380 mg mL-1 de fosfato soluble a los seis días. Veintisiete de las mejores cepas fueron seleccionadas con base en la eficiencia de solubilización de fosfato...
Palavras-chave: Acidos orgánicos; Fosfatasas; Solubilización de fosfato; Inmunodetección; Roca fosfórica; Bacterias solubilizadoras de fosfato; Enfófitas; Organic acids; Phosphatases; Phosphate solubilization; Immunodetection; Rock phosphate; Phosphate solubilizing; Bacteria; Endophyte; Doctorado; Edafología.
Ano: 2010 URL: http://hdl.handle.net/10521/245
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Alternatives to antibiotics in diets of weaned piglets Ciência Rural
Ferreira,Soraia Viana; Barbosa,Lívia Maria dos Reis; Soares,Marcos Henrique; Marcolla,Camila Schultz; Holanda,Débora Muratori; Saraiva,Alysson.
ABSTRACT: This experiment was conducted to evaluate the effect of growth promoter additives an alternative to antibiotics on performance, intestinal morphology and on microbiota of 21-to-35-day-old piglets. A total of 160 commercial crossbred piglets (males and females) with initial weight of 6.10±0.709kg were allotted in a completely randomized design with five treatments: Basal diet - Negative Control (NC); Basal diet + antibiotic (PC); Basal diet + mannanoligosaccharides (MOS); Basal diet + organic acids (OA), Basal diet + mannanoligosacharides + organic acids (MOS+OA), eight replicates and four piglets per experimental unit. The inclusion of additives in the diets had no effect (P>0.05) on the final average weight of piglets. Similarly, no effects...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Additives; Growth promoters; Organic acids; Prebiotics.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001200651
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Antioxidant activity, anthocyanins and organic acids content of grape juices produced in Southwest of Minas Gerais, Brazil Ciência e Agrotecnologia
Vilas Boas,Ana Carolina; Henrique,Paôla de Castro; Lima,Luiz Carlos de Oliveira; Decarlos Neto,Antônio.
Phenolic compounds and anthocyanins content in grape juices varies in the cultivar, ripening and climate characteristics. The objective of this work was to characterize and evaluate antioxidant activity of grape juices produced in southwestern Minas Gerais. Grapes were harvested, sanitized and the juices from cultivars 'Bordô', 'Isabel Precoce', 'BRS Violeta' and 'BRS Rúbea' were produced in artisanal equipment by steam extraction and stored for 120 days. The following analyzes were performed during storage: color (L *), pH, soluble solids, titratable acidity, anthocyanins, antioxidant activity (DPPH and β-caroteno/linoleic acid), total phenolics, vitamin C and organic acids. Among the cultivars evaluated, the consumption of grape juice from cultivar 'BRS...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis labrusca; Phenolics; Vitamin C; Organic acids.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500007
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Antioxidant potential and relation with chemical composition of wild edible mushrooms cap and stipe IPB - Escola Superior Agrária
Ribeiro, Bárbara; Lopes, Rosário; Andrade, P.B.; Seabra, R.M.; Gonçalves, Rui; Baptista, Paula; Valentão, P..
Tipo: ConferenceObject Palavras-chave: Organic acids; Phenolics composition; Alkaloids; Wild mushrooms.
Ano: 2008 URL: http://hdl.handle.net/10198/5736
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Antioxidative properties of tronchuda cabbage (Brassica oleraceae var. costata) external leaves against DPPH, superoxide radical, hydroxyl radical and hypochlorous acid IPB - Escola Superior Agrária
Vrchovska, V.; Sousa, C.; Valentão, P.; Ferreres, F.; Pereira, J.A.; Seabra, R.M.; Andrade, P.B..
The ability of the aqueous extract of tronchuda cabbage (Brassica oleracea L. var. costata DC) external leaves to act as a scavenger of DPPH- and reactive oxygen species (superoxide radical, hydroxyl radical and hypochlorous acid) was investigated. A phytochemical study was also undertaken, and thirteen phenolic compounds and five organic acids were identified and quantified. Tronchuda cabbage extracts exhibited antioxidant capacity in a concentration-dependent manner in all assays, although some pro-oxidant effect was also noticed. The samples with higher phenolic and organic acid contents displayed the major antioxidant potentials.
Tipo: Article Palavras-chave: Tronchuda cabbage; Brassica oleracea L. var. costata DC; DPPH; Superoxide radical; Hydroxyl radical; Hypochlorous acid; Phenolics; Organic acids.
Ano: 2006 URL: http://hdl.handle.net/10198/744
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Bioactive compounds and quality characteristics of five apples cultivars Ciência Rural
Zucoloto,Moises; Ku,Kang-Mo; Kushad,Mosbah M.; Sawwan,Jamal.
The aim of this study was to evaluate bioactive compounds in five apple cultivars and to analyze correlation of their quality characteristics with concentration of bioactive compounds. Phenolic compounds measurements were made in a spectrophotometer compared to a standard curve of gallic acid and expressed as gallic acid equivalent (GAE) per 100g of dry weight. Sugar and organics acids in five cultivars were quantified using high-performance liquid chromatograph (HPLC). Antioxidant activities were evaluated using three complementary tests 2,2-diphenyl-1-picrylhidrazyl (DPPH) scavenging activity, ferric reducing antioxidant power (FRAP), and 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS). 'GoldRush' had the highest total phenolic compared to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mallus domestica; Organic acids; Sugar; Antioxidant capacity; HPLC/DAD.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001101972
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Bioatividade de ácidos húmicos: efeitos sobre o desenvolvimento radicular e sobre a bomba de prótons da membrana plasmática. Repositório Alice
FAÇANHA, A.R.; FAÇANHA, A.L.O.; OLIVARES, F.L.; GURIDI, F.; SANTOS, G. de A.; VELLOSO, A.C.X.; RUMJANEK, V.M.; BRASIL, F.; SCHRIPSEMA, J.; BRAZ-FILHO, R.; OLIVEIRA, M.A de; CANELLAS, L.P..
A bioatividade de ácidos húmicos (AH) isolados de lodo da estação de tratamento de esgoto (AHL) e de vermicomposto (AHV) foi avaliada pela ação dessas substâncias sobre o transporte de prótons através da membrana plasmática de células de raízes de café e milho e sua relação com o desenvolvimento dessas espécies. Houve estímulo da área superficial radicular em ambas as espécies cultivadas com ambos AH, mostrando uma concentração ótima em torno de 40 mg L-1. Nessa condição, os tratamentos com AHL e AHV estimularam a H+-ATPase de membrana plasmática em plântulas de café e milho. Os AHL foram mais efetivos na promoção desses efeitos do que os AHV. A modificação do perfil cromatográfico dos AH em solução antes e após o cultivo das plântulas revelou que a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Zea mays; Coffea arabica; Lodo residual; Ácidos orgânicos; Vermicomposto; Sewage sludge; Organic acids; Vermicomposting.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/108732
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Brassica oleracea var. costata: comparative study on organic acids and biomass production with other cabbage varieties IPB - Escola Superior Agrária
Sousa, C.; Pereira, D.M.; Taveira, M.; Dopico-García, S.; Valentão, P.; Pereira, J.A.; Bento, Albino; Andrade, P.B..
BACKGROUND: A study was undertaken to evaluate the effect of agronomic practices, harvesting time and leaf age on the organic acid composition and biomass production of Brassica oleracea L. var. costata DC (tronchuda cabbage). Samples were cultivated under eight different fertilisation regimes (two levels each of nitrogen, boron and sulfur, an organic fertiliser and no fertiliser) and collected at three different times. RESULTS: Principal component analysis of the data indicated significant differences. Three principal components with an eigenvalue higher than one accounted for 79.0% of the total variance of the data set. Samples obtained with conventional fertilisation were characterised by the highest values of fresh weight. External leaves showed higher...
Tipo: Article Palavras-chave: Brassica oleracea L. var. costata DC; Organic acids; Fertilisation; Principal component analysis.
Ano: 2009 URL: http://hdl.handle.net/10198/3046
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Calcium anacardate as growth promoter for piglets at the nursery phase PAB
Matos,Amanda Veruska Silva de; Watanabe,Pedro Henrique; Freitas,Ednardo Rodrigues; Santos,Kassia Moreira; Araújo,Lina Raquel Santos; Nepomuceno,Rafael Carlos; Vieira,Alini Mari; Vieira,Eloisa Helena Mendes.
Abstract: The objective of this work was to evaluate the effects of the dietary inclusion of calcium anacardate on the performance, diarrhea incidence, blood parameters, intestinal morphometry, and pH of gastrointestinal contents in piglets from 21 to 42 days of age. Sixty weaned Topigs piglets, with initial weight of 6.049±0.311 kg, were distributed in the following treatments: diet with or without antibiotic growth promoter (zinc bacitracin) and diets supplemented with increasing levels of calcium anacardate (0.4, 0.8, and 1.2%), with six replicates and two animals per experimental unit. No differences in performance (21 to 42 days of age), blood parameters, and villus height:crypt depth ratio were found between piglets fed diets containing calcium...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardic acid; Intestinal morphometry; Organic acids; Phenolic compounds; Post-weaning; Zinc bacitracin.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201253
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Calidad e inocuidad de jitomate (Lycopersicum esculentum L.) fresco almacenado a diferentes temperaturas: relación del contenido de azúcares y ácidos orgánicos con la adherencia de Escherichia coli (ECET). Colegio de Postgraduados
Ibarra Cantún, Diego.
La inocuidad es un requisito importante de aceptación en el jitomate (Lycopersicum esculentum L.), para permitirle abrir nuevos mercados. En los que además, el fruto debe cumplir con ciertos estándares de calidad relacionados con sus propiedades físicas y químicas. El presente trabajo tuvo como objetivo determinar las propiedades físicas y químicas del fruto de jitomate almacenado a diferentes temperaturas en presencia de Escherichia coli (ECET). Se utilizaron frutos de jitomate variedad Charleston, cultivados en invernadero de hidroponía en el Municipio de Aquixtla, Puebla. Los frutos se sometieron a dos temperaturas de almacenamiento (7 y 22°C), inoculados con 7 log10UFC/mL de E. coli (ECET). Se evaluaron algunas propiedades físico-químicas como color,...
Palavras-chave: Azúcares; Acidos orgánicos; Adherencia; Lycopersicum esculentum; Adherence; Organic acids; Sugars; Estrategias para el Desarrollo Agrícola Regional; EDAR.
Ano: 2012 URL: http://hdl.handle.net/10521/1696
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Caracterização de acessos do banco de germoplasma de café da Epamig em relação ao ácido clorogênico, trigonelina e cafeína. Repositório Alice
SETOTAW, T. A.; NUNES, C. F.; SOUZA, C. S. de; SALGADO, S. L.; CARVALHO, G. R.; REZENDE, J. C. de; PEREIRA, A. A.; CANÇADO, G. M. de A..
O banco de germoplasma de café da EPAMIG contém acessos muito importantes para o programa de melhoramento de Coffea arabica, os quais necessitam de caracterização em relação aos ácidos orgânicos e cafeína. Portanto, esse trabalho objetivou avaliar 64 acessos de C. arabica, C. canephora var. Robusta e Híbrido de Timor mantidos no banco de germaplasma localizado na Fazenda Experimental da EPAMIG no município de Patrocínio/MG. A avaliação foi baseada na quantificação do ácido clorogênico, trigonelina e cafeína por meio da determinação empregando HPLC Perkins Elmer com ?UV/VIS detector?. Detectou-se variabilidade em relação ao ácido clorogênico, trigonelina e cafeína entre acessos de café arábica e os outros acessos do banco de germoplasma. Isso evidencia a...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Ácidos orgânicos; Cromatografia líquida de alta eficiência; Cafeína; Caffeine; Organic acids; Coffea arabica; High performance liquid chromatography.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1036538
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Characterization of grain mold resistant sorghum germplasm accessions for physio-morphological traits Open Agri
Thakur, R.P..
Palavras-chave: Grain; Germplasm; Fungi; Sorghum; Agronomic characters; Hybrids; Breeds (animals); Organic acids; Genetic resistance; Cereals.
Ano: 2008 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3143
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Chemical and antioxidative assessment of dietary turnip (Brassica rapa var. rapa) IPB - Escola Superior Agrária
Fernandes, F.; Valentão, P.; Sousa, C.; Pereira, J.A.; Seabra, R.M.; Andrade, P.B..
The phenolic compounds and organic acids of turnip (Brassica rapa var. rapa L.) edible parts (leaves and stems, flower buds and roots) were determined by HPLC–DAD and HPLC–UV, respectively. The results revealed a profile composed of 14 phenolics (3-p-coumaroylquinic, caffeic, ferulic and sinapic acids, kaempferol 3-O-sophoroside-7-O-glucoside, kaempferol 3-O-sophoroside-7-O-sophoroside, kaempferol 3-O-(feruloyl/caffeoyl)-sophoroside-7-O-glucoside, kaempferol 3,7-O-diglucoside, isorhamnetin 3,7-O-diglucoside, kaempferol 3-O-sophoroside, 1,2-disinapoylgentiobiose, 1,20-disinapoyl-2-feruloylgentiobiose, kaempferol 3-O-glucoside and isorhamnetin 3-O-glucoside) and six organic acids (aconitic, citric, ketoglutaric, malic, shikimic and fumaric acids). The...
Tipo: Article Palavras-chave: Turnip; Brassica rapa var. rapa L.; Phenolic compounds; Organic acids; Antioxidant activity.
Ano: 2007 URL: http://hdl.handle.net/10198/736
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Chemical and sensorial characterization of tropical syrah wines produced at different altitudes in northeast of the Brazil. Repositório Alice
OLIVEIRA, J. B. de; EGIPTO, R.; LAUREANO, O.; CASTRO, R. de; PEREIRA, G. E.; RICARDO-DA-SILVA, J. M..
Over the years, viticulture has expanded to new regions outside the temperate zones, such as Northeast Brazil, India, Thailand, Myanmar, Vietnam, Bangladesh and Venezuela, characterized by the production of tropical wines. It is important for the productive sector to comprehend the effects of grapevine interaction with the characteristics of each new region on wines composition. In this study, the composition of wines of Syrah from two regions with different altitudes in Northeast Brazil were analyzed by different methodologies to characterize chemical compounds as sugar, acids, minerals, phenolics (anthocyanins, flavonols, stilbenes and condensed tannins) and the sensory profile. The wines of the Bahia region (1100 m of altitude) obtained high...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Altitude tropical region; Organic acids; Semi-arid tropical region; Syrah; Phenolic compounds.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118412
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Chemical assessment and in vitro antioxidant capacity of Ficus carica latex IPB - Escola Superior Agrária
Oliveira, A.P.; Silva, L.R.; Ferreres, F.; Pinho, P. Guedes de; Valentão, P.; Silva, B.M.; Pereira, J.A.; Andrade, P.B..
Ficus species possess latex-like material within their vasculatures, affording protection and selfhealing from physical attacks. In this work, metabolite profiling was performed on Ficus carica latex. Volatiles profile was determined by HS-SPME/GC-IT-MS, with 34 compounds being identified, distributed by distinct chemical classes: 5 aldehydes, 7 alcohols, 1 ketone, 9 monoterpenes, 9 sesquiterpenes and 3 other compounds. Sesquiterpenes constituted the most abundant class in latex (ca. 91% of total identified compounds). Organic acids composition was also characterized, by HPLC-UV, and oxalic, citric, malic, quinic, shikimic and fumaric acids were determined. Malic and shikimic acids were present in higher amounts (ca. 26%, each). The antioxidant potential...
Tipo: Article Palavras-chave: Ficus carica latex; Volatiles; Organic acids; Antioxidant potential; Acetylcholinesterase inhibition.
Ano: 2010 URL: http://hdl.handle.net/10198/3116
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Chemical composition and antioxidant activity of tronchuda cabbage internal leaves IPB - Escola Superior Agrária
Ferreres, F.; Sousa, C.; Vrchovska, V.; Valentão, P.; Pereira, J.A.; Seabra, R.M.; Andrade, P.B..
A phytochemical study was undertaken on the internal leaves of tronchuda cabbage (Brassica oleracea L. var. costata DC). Seventeen phenolic compounds were characterized and quantified by reversed-phase HPLCDAD-ESI-MSn and HPLC/DAD, respectively: quercetin 3-O-sophoroside-7-O-glucoside, 3-p-coumaroylquinic acid, kaempferol 3-O-sophoroside-7-O-glucoside, kaempferol 3-O-(caffeoyl)-sophoroside-7-O-glucoside, sinapoyl glucoside acid, kaempferol 3-O-(sinapoyl)-sophoroside-7-Oglucoside, kaempferol 3-O-(feruloyl)-sophoroside-7-Oglucoside, kaempferol 3-O-(p-coumaroyl)-sophoroside- 7-O-glucoside, 4-p-coumaroylquinic acid, sinapic acid, kaempferol 3-O-sophoroside, 3 isomeric forms of 1,2- disinapoylgentiobiose, 1-sinapoyl-2-feruloylgentiobiose,...
Tipo: Article Palavras-chave: Tronchuda cabbage internal leaves; Brassica oleracea L. var. costata DC; Phenolics; Organic acids; Antioxidant capacity.
Ano: 2006 URL: http://hdl.handle.net/10198/738
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Chemical composition and fermentative parameters of heart of palm waste produced from Alexander Palm ensiled with chemical additives R. Bras. Zootec.
Bayão,Geraldo Fábio Viana; Marcondes,Marcos Inácio; Queiroz,Augusto César de; Pimentel,Robérson Machado; Cardoso,Lucas Ladeira; Cardoso,Alex Júnio da Silva; Sousa,Katiene Régia Silva; Batalha,Camila Delveaux Araujo.
ABSTRACT The objective of this study was to evaluate the chemical composition and the fermentative parameters of heart of palm waste produced from Alexander Palm, ensiled with chemical additives. Treatments consisted of silage of the sheath with or without calcium oxide. In the silage without calcium oxide, we evaluated the control silage (without additive) and the silage enriched with 5.0 g kg−1 urea (urea). In the silage with calcium oxide, we evaluated the silage enriched with 5.0 g kg−1 calcium oxide (control) and the silage enriched with 5.0 g kg−1 urea and 5.0 g kg−1 calcium oxide (urea). Experimental silos were distributed in a completely randomized design in a 2 × 2 factorial arrangement (inclusion or lack of lime × inclusion or lack of urea), with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fermentation; Forage conservation; Organic acids; Silage.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000600489
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Chemical fractionation of carbohydrate and protein composition of corn silages fertilized with increasing doses of nitrogen Ciência Rural
Neumann,Mikael; Nörnberg,José Laerte; Leão,Guilherme Fernando Mattos; Horst,Egon Henrique; Figueira,Danúbia Nogueira.
ABSTRACT: The use of nitrogen fertilizers in corn crops for silage can improve both production and, theoretically, nutritional quality, especially carbohydrate and protein fractions, thereby optimizing animal production. Thus, the aim of this study was to evaluate the effect of increasing levels of nitrogen fertilization in carbohydrate and protein fractionation on the resulting corn silage (Zea mays L.). Nitrogen fertilization was carried out in the urea form (45-00-00) in V5 stage, at the following doses: T1: 0kg N ha-1; T2: 45kg N ha-1; T3: 90kg N ha-1; and T4: 135kg N ha-1. Crops were harvested at R4 stage and submitted to ensiling in experimental PVC silos. The chemical composition of the resulting silage was evaluated after silo opening. There was no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Starch; Organic acids; C fraction; PH; Solubility.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500251
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Climate effects on physicochemical composition of Syrah grapes at low and high altitude sites from tropical grown regions of Brazil. Repositório Alice
OLIVEIRA, J. B. de; EGIPTO, R.; LAUREANO, O.; CASTRO, R. de; PEREIRA, G. E.; RICARDO-DA-SILVA, J. M..
The major areas of the world where viticulture is practiced enjoy temperate or cool temperature climates. When wine grapes are grown in tropical regions, edaphoclimatic factors result in distinct grape quality attributes, and production techniques also require significant adjustment. The objective of this study was to characterize the chemical compositions, in particular of phenolic compounds, of Syrah grapes grown in two location in northeast Brazil - these are also at widely different altitudes. A range of methods of phenolic extraction were used, along with classical chemical analyses including for organic acids, sugars, monomeric anthocyanins, flavonols, stilbene, condensed tannins and some of the monomeric and small oligomeric procyanidins. The...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Organic acids; Tropical region; Vitis vinifera L; Phenolic compounds; Sugars.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118402
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