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| Registros recuperados: 43 | |
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| Rodriguez,Yeison F. B.; Guzman,Nelson G.; Hernandez,Joel G.. |
| ABSTRACT The objective of this work was to study the influence of two postharvest processing methods on the biochemical composition and sensory analysis of a Colombian specialty coffee. For this purpose, coffee beans (Coffea arabica) of the Castillo variety were collected and processed using the wet and semi-dry methods, and the drying process was conducted in a sun drier prototype with a plastic parabolic cover, with a maximum drying air temperature of 50 °C; green coffee beans were managed according to the official Specialty Coffee Association cupping protocol and roasted to a medium and dark degree. Physicochemical determinations (pH, color, titratable acidity, caffeine content, and chlorogenic acid quantification) in green coffee and roasted coffee... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caffeine; Coffee roasting; Coffee processing; Cup quality; Chlorogenic acids. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200177 |
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| Laranja,Alessandra Theodoro; Manzatto,Antonio José; Campos Bicudo,Hermione Elly Melara de. |
| Caffeine and used coffee grounds completely blocked the development of Aedes aegypti in the early stages, in treatments with the concentrations 1.0 mg/mL and 50 mg/mL, respectively. More advanced stages and even adults were obtained in lower concentrations of both substances, enabling observations to be made of mortality rate, longevity and esterase patterns. The experiments involved treatments using either eggs or 3rd instar larvae (L3), with or without the addition of fish food. Mortality rates prior to the adult stage and adult longevity were significantly different in the comparisons among treatments, in every kind of experiment, but in those using L3 larvae, their percentages were smaller. Observations of the time of larva and adult onset suggested... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aedes aegypti; Caffeine; Used coffee grounds; Mortality; Longevity; Esterases; Alternative control. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400004 |
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| Gourmelon, Michele; Caprais, Marie-paule; Mieszkin, Sophie; Marti, Romain; Wery, Nathalie; Jarde, E.; Derrien, Marc; Jadas-hecart, A.; Communal, P. Y.; Jaffrezic, A.; Pourcher, A. M.. |
| The microbiological quality of coastal or river waters can be affected by faecal pollution from human or animal sources. An efficient MST (Microbial Source Tracking) toolbox consisting of several host-specific markers would therefore be valuable for identifying the origin of the faecal pollution in the environment and thus for effective resource management and remediation. In this multidisciplinary study, after having tested some MST markers on faecal samples, we compared a selection of 17 parameters corresponding to chemical (steroid ratios, caffeine, and synthetic compounds), bacterial (host-specific Bacteroidales, Lactobacillus amylovorus and Bifidobacterium adolescentis) and viral (genotypes I-IV of F-specific bacteriophages, FRNAPH) markers on... |
| Tipo: Text |
Palavras-chave: Microbial source tracking; Faecal pollution; Bacteroidales; Bifidobacterium adolescentis; Lactobacillus; FRNA bacteriophages; Steroids; Caffeine. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00016/12710/9690.pdf |
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| Ky, Chin-long; Barre, Philippe; Noirot, Michel. |
| The objective of the paper was to identify the number of major loci explaining caffeine content in coffee seeds. Investigations were based on previously published results: (1) Caffeine binds to chlorogenic acids in a 1:1 molecular ratio; (2) Between species, the caffeine content is correlated to the chlorogenic acid content; (3) Only a part of chlorogenic acids is bound to caffeine. Especially, the content ratio between caffeine and chlorogenic acids varied between species. For identifying the number of major loci, a quantitative trait locus (QTL) approach was carried out using an interspecific cross between two highly differentiated species-Coffea liberica dewevrei and Coffea pseudozanguebariae, the latter being a caffeine-free species. As main finding,... |
| Tipo: Text |
Palavras-chave: Coffea; Chlorogenic acids; Caffeine; QTL; Interspecific cross. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00152/26298/24429.pdf |
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| Cardozo Junior,Euclides Lara; Donaduzzi,Carmen Maria; Ferrarese-Filho,Osvaldo; Friedrich,Juliana Cristhina; Gonela,Adriana; Sturion,José Alfredo. |
| The objective of this work was to determine the contents of methylxanthines, caffeine and theobromine, and phenolic compounds, chlorogenic and caffeic acids, in 51 mate progenies (half-sib families) and estimate the heritability of genetic parameters. Mate progenies were from five Brazilian municipalities: Pinhão, Ivaí, Barão de Cotegipe, Quedas do Iguaçu, and Cascavel. The progenies were grown in the Ivaí locality. The contents of the compounds were obtained by high performance liquid chromatography (HPLC). The estimation of genetic parameters by the restricted maximum likelihood (REML) and the prediction of genotypic values via best linear unbiased prediction (BLUP) were obtained by the Selegen - REML/BLUP software. Caffeine (0.248-1.663%) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ilex paraguariensis; Caffeine; Caffeic acid; Chlorogenic acid; Genetic parameters; Theobromine. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000200008 |
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| REIS,L.A.C.; CARVALHO,F.P.; FRANÇA,A.C.; FRANCINO,D.M.T.; PINTO,N.A.V.D.; FREITAS,A.F.. |
| ABSTRACT: The most widely used herbicide in coffee crop is glyphosate, it inhibits the biosynthesis of secondary metabolites, responsible for structures and substances of plant defense. This work aimed to evaluate the morphoanatomy, total phenols, flavonoids and caffeine in leaves of Arabica coffee submitted to different sub-doses of glyphosate. The treatments were combinations of three coffee cultivars (MGS Travessia, Oeiras MG 6851 and Catuaí IAC 144) and five sub-doses of glyphosate (0.0, 57.6, 115.2, 230.4 and 460.8 g a.e. ha-1). The total thickness of the leaf blade, thickness of adaxial and abaxial epidermis, palisade and spongy parenchyma, in addition to the total phenol, total flavonoids and caffeine were evaluated 30 days after spraying. Catuaí... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide drift; Coffea arabica; Epidermis; Parenchyma; Caffeine; Flavonoid. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100336 |
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| Cardoso-Lopes,Elaine Monteiro; Paula,Daisy Maria Bentes de; Barbo,Fausto Erritto; Souza,Amanda de; Blatt,Cecília Terumi Teradaira; Torres,Luce Maria Brandão; Young,Maria Cláudia Marx. |
| Pera glabrata (Schott) Baill. was selected for this study after showing a preliminary positive result in a screening of Atlantic Forest plant species in the search for acetylcholinesterase inhibitors and antifungal compounds. The bioassays were conducted with crude ethanol extract of the leaves using direct bioautography method for acetylcholinesterase and antifungal activities. This extract was partitioned with hexane, chloroform and ethyl acetate solvents. The active chloroform fraction was submitted to silica gel chromatography column affording 12 groups. Caffeine, an alkaloid, which showed detection limits of 0.1 and 1.0 µg for anticholinesterasic and antifungal activities, respectively, was isolated from group nine. After microplate analyses, only... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 9-hydroxy-4-megastigmen-3-one; Biological activities; Caffeine; Euphorbiaceae. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000400019 |
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| Mendes,LR; Silva,RB; Bueno,CFD; Couto,FAP; Dias,AN; Fernandes,V; Faria Filho,DE. |
| This experiment aimed at evaluating the effect of the dietary inclusion of caffeinated and decaffeinated coffee on the performance and internal and external egg quality of commercial layers. One hundred and twenty 25-week-old Hy-line Brown layers, with 1575 ± 91 average body weight, were distributed according to a completely randomized experimental design with three treatments (control, 1.2% caffeinated coffee, or 1.2% decaffeinated coffee) of five replicates of eight birds each. The inclusion of 1.2% caffeinated coffee was calculated to supply 6mg caffeine per kg body weight, which is considered a moderate dose. The applied treatments did not influence (p>0.05) feed intake, egg production, egg weight, egg mass, feed conversion ratio, Haugh units,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Layers; Caffeinated coffee; Decaffeinated coffee; Caffeine. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200010 |
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| Rios,Teodulo Salinas; Torres,Teresa Sánchez; Cerrilla,María Esther Ortega; Hernández,Marcos Soto; Cruz,Antonio Díaz; Bautista,Jorge Hernández; Cuéllar,Cuauhtémoc Nava; Huerta,Humberto Vaquera. |
| The objective of the present study was to determine the nutritive value, the presence of antioxidant compounds, and the antioxidant capacity of coffee pulp ensiled or non-ensiled. Dry matter (DM), crude protein (CP), ash, acid detergent fiber (ADF), neutral detergent fiber (NDF), and lignin, as well as the antioxidant compounds present in coffee pulp and their antioxidant capacity, were determined. A completely randomized design was used. Data were analyzed by analysis of variance. Ensiling of coffee pulp increased the CP content from 98.6 to 111.6 g kg−1 DM, NDF from 414.6 to 519.5 g kg−1 DM, ADF from 383.9 to 439.3 g kg−1 DM, and lignin from 122.9 to 133.6 g kg−1 DM. Caffeine decreased from 5.72 to 5.02 mg g−1 DM. Three antioxidant compounds were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caffeic; Caffeine; Chlorogenic; Gallic acid; Silage; Trolox. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000900492 |
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| Malta, Marcelo Ribeiro; EPAMIG; Chagas, Sílvio Júlio de Rezende; EPAMIG. |
| O presente trabalho teve como objetivo avaliar os teores de trigonelina, ácidos clorogênicos (5-ACQ) e cafeína em grãos de diferentes cultivares de cafeeiro (Coffea arabica L.). As cultivares avaliadas foram coletadas na Fazenda Experimental da Epamig em Lavras, Estado de Minas Gerais, no ano agrícola de 2005/2006. O delineamento experimental utilizado foi um inteiramente casualizado constando de oito cultivares de café com três repetições. Foram avaliadas as cultivares: Oeiras MG 6851, Acaiá Cerrado MG 1474, Catuaí Vermelho IAC 99, Rubi MG 1192, Topázio MG 1190, Mundo Novo IAC 379/19, Catucaí Amarelo 2 SL e Catuaí Amarelo IAC 62. Após a colheita dos cafés por derriça manual no pano, estes foram lavados e submetidos ao processo de descascamento e... |
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Palavras-chave: 5.01.03.04-0 Produção de Mudas Coffea arabic; Melhoramento; Composição química; Ácido clorogênico; Cafeína; Trigonelina. Coffea Arabica; Breeding; Chemical composition; Chlorogenic acids; Caffeine; Trigonelline. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6629 |
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| Reis,A.M.S.; Oliveira,K.P.; Paula,I.H.F.; Silva,A.P.; Tarragô,J.F.; Ocarino,N.M.; Serakides,R.. |
| ABSTRACT The aim of this study was to evaluate the effect of concentrations of caffeine on the viability, synthesis activity and gene expression in cultures of chondrocytes. Extracted articular cartilage from the femurs and tibias of 15 Wistar rats at three days old to isolate chondrocytes. Chondrocytes were cultured in chondrogenic medium (control) or supplemented with caffeine (0.5, 1.0, 2.0mM). Cell viability, alkaline phosphatase activity and collagen synthesis were assessed using colorimetric assays at 7, 14, 21 days. The chondrocyte cultures of all groups grown under coverslips were stained with hematoxylin-eosin to determine the percentage of cells/field and with PAS, safranin O, alcian blue to determine the percentage of matrix chondrogenic/field... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rats; Caffeine; Chondrocytes; Chondrogenesis. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000200509 |
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| Del Campo,A.; Bracho,M.; Marcano,L.; Guíñez,J.; De la Torre,C.. |
| This work evaluated the qualitative and quantitative cellular changes induced by treatment with 5-aminouracil (5-AU) and a combination of 5-AU and caffeine in plant cells in relation to DNA damage, repaired damage, and residual damage. As biological material, Allium cepa L. root tips were used, grown in filtered water, in darkness, with aeration at constant temperature of 25 °C ± 0.5. Cell populations were synchronized using 5 mM caffeine in order to study the effects of 5-AU and caffeine/5-AU combined treatment on the DNA content and their incidence in the entrance to mitosis. The results showed a delay in the G2 period due to induced DNA damage by the 5-AU and caffeine/5-AU combined treatment, shown by aberrant metaphases, anaphases and telophases. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5-aminouracil; G2 checkpoints; Caffeine. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452005000200003 |
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| Marcelain,Katherine; de la Torre,Consuelo; González,Patricio; Pincheira,Juana. |
| Checkpoint response to DNA damage involves the activation of DNA repair and G2 lengthening subpathways. The roles of nibrin (NBS1) and the ATM/ATR kinases in the G2 DNA damage checkpoint, evoked by endogenous and radio-induced DNA damage, were analyzed in control, A-T and NBS lymphoblast cell lines. Short-term responses to G2 treatments were evaluated by recording changes in the yield of chromosomal aberrations in the ensuing mitosis, due to G2 checkpoint adaptation, and also in the duration of G2 itself. The role of ATM/ATR in the G2 checkpoint pathway repairing chromosomal aberrations was unveiled by caffeine inhibition of both kinases in G2. In the control cell lines, nibrin and ATM cooperated to provide optimum G2 repair for endogenous DNA damage. In... |
| Tipo: Journal article |
Palavras-chave: Ataxia-telangiectasia; ATM; ATR kinases; Caffeine; G2 checkpoint; Nibrin (Nbs1); Nijmegen breakage syndrome (NBS). |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000200007 |
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| Registros recuperados: 43 | |
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