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| Registros recuperados: 186 | |
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| Guimarães,José Tasso Felix; Cohen,Marcelo Cancela Lisboa; França,Marlon Carlos; Silva,Any Kelly Terra da; Rodrigues,Suyanne Flavia Santos. |
| Based on sedimentological and geochemical data, this work relates spectrophotometric measurements with sediment composition and its application in palaeoecological studies of Amazon wetlands. The CIELAB values are directly related to mineralogical and chemical composition, mostly involving quartz, iron oxyhydroxides and sulfides (e.g. pyrite), and total organic carbon. Total organic carbon contents between 0.4-1%, 1-2%, 3-5% and 15-40% were related to L* (lightness) data of 27, 26-15, 7-10 and 7 or less, respectively. The CIELAB values of a deposit in Marabá, Pará, were proportional to variations in quartz and total organic carbon contents, but changes in zones of similar color, mainly in the +a* (red) and +b* (yellow) values of deposits in Calçoene, Amapá... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sedimentology; Amazon region; Munsell color systems; Mineralogy; Chemical composition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672013000300009 |
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| Zohra,Houari Fatima; Ramazan,Erenler; Ahmed,Hariri. |
| ABSTRACT In the present study, the phytochemical composition, antioxidant and anti-hemolytic activities of root and aerial part Rubia tinctorum hydromethanolic extracts were investigated. Phytochemical screening reveals the presence of phenol, alkaloids, coumarin, flavonoids, and tannins in both extracts. LC-ESI-MS/MS analysis showed the presence of 15 and 17 components in the root and the aerial part extracts, respectively. The quantitative analysis indicates the richness of root extracts in phenolic compounds (118.38 mg GAE/g) and flavonoids (45.29±0.04 mg GAE/g), the aerial part extract has the highest levels in tannins (134.1±0.1 mg GAE/g). Besides, aerial part extracts revealed the highest antioxidant activity for DPPH (83.23 %) and FRAP (1.51±0.22),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactivity; Chemical composition; Free radical; Rubia tinctorum L. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2022000300403 |
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| Abud, Haynna Fernandes; Araújo, Eduardo Fontes; Araujo, Roberto Fontes; Picoli, Edgard Augusto de Toledo; Gallão, Maria Izabel. |
| This study aimed to evaluate the structural changes and reserve deposition of malagueta and biquinho pepper seeds and to determine their chemical composition during ontogeny. The fruits were collected 25, 40, 55, 70, 85, and 100 days after anthesis (DAA). After collection, the seeds were extracted and fixed in FAA 50 and then stored in 70% ethanol. Subsequently, the seeds were embedded in methacrylate (Historesin) and sectioned with a microtome. The sections were stained with Toluidine blue O for anatomical analysis and Xylidine Ponceau, Periodic acid Schiff (PAS) and Lugol’s iodine solution for histochemical analysis. Sections were made using a cryomicrotome for acid phloroglucinol staining and Sudan III tests. Progressive lignification of the seed coat... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum frutescens; C. chinense; Chemical composition; Histochemistry; Reserves.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32492 |
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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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| Silveira, Hugo Vinícius Lelis; Braz, Thiago Gomes dos Santos; Rigueira, João Paulo Sampaio; Santos, Márcia Vitória; Gusmão, Jéssica Oliveira; Alves, Matheus Almeida; Martuscello, Janaina Azevedo; Mourthé, Mário Henrique França. |
| The aim of this study was to evaluate the addition of macauba palm cake (Acrocomia aculeata) on the chemical composition, fermentation and aerobic stability of elephant grass silages (Pennisetum purpureum). The experiment was performed in a completely randomized design with four replicates. The treatments were composed of six levels of macauba palm cake (0, 6, 12, 18, 24, 30%) as additive to elephant grass silage. Dry matter and ethereal extract content of the silage increased linearly with the inclusion of the additive. Addition levels of 15.54% would provide 35% of dry mass, and the limit of 7.00% of ethereal extract in the silage could be obtained with 10.47%. The neutral detergent fiber content reduced linearly from 68.97 to 52.59%, but lignin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrocomia aculeata aerobic stability chemical composition dry matter losses effluent production pH Acrocomia aculeate; Aerobic stability; Chemical composition; Dry mass losses; Effluent production; PH.. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47171 |
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| Lima, Hellen Leles; Universidade Federal da Grande Dourados; Goes, Rafael Henrique de Tonissi e Buschinelli de; Universidade Federal da Grande Dourados; Cerilo, Sara Letícia Nocchi; Universidade Federal da Grande Dourados; Oliveira, Euclides Reuter de; Universidade Federal da Grande Dourados; Brabes, Kelly Cristina da Silva; Universidade Federal da Grande Dourados; Teodoro, Ana Lúcia; Universidade Estadual de Maringá. |
| To evaluate the grass B. brizantha cv. Marandu, under grazing, we use three sampling methods: total availability (TA), hand plucked (HP) and extrusa (EXT) in a completely randomized design with four replications. The hand plucked method was collected manually after observing the behavior of grazing animals. TA was determined by cutting at ground level, using a metallic square (0.25 m²) and EXT was collected by rumen evacuation. The values for dry matter (DM), neutral detergent fiber (NDF) and acid detergent fiber (ADF), were 27.20, 88.52 and 43.70% in the treatment and HP, and 25.53, 87.70 and 45.50% in TA. The extrusa had the lowest DM content (15.88%) and higher crude protein (CP) (15.22%), possibly due to the presence of saliva. The levels checked for... |
| Tipo: Pesquisa de campo |
Palavras-chave: 5.04.04.00-8 Brachiaria brizantha; Chemical composition; Extrusa; Hand plucking; Total availability. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/13745 |
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| Morais, Selene Maia de; Alves, Daniela Ribeiro; Nascimento, José Eranildo Teles do; Cavalcante, Géssica Soares; Vieira-Araújo, Franscisco Marcelo. |
| Current study analyzes the chemical composition of lipids in fish commonly found in the dams of the state of Ceará, Brazil, namely Pterygoplichthys pardalis (bodó), Hoplias malabaricus (traira), Cichla ocellaris (tucunaré), Prochilodus brevis (curimatã) and Oreochomis niloticus (tilapia). The animals were collected during the summer and Folch extraction procedure was used for the extraction of lipids, whilst Iupac methodology (International Union of Pure and Applied Chemistry [Iupac], 1987) was used to methylate the fatty acids. Methyl esters were analyzed by GC/MS and the different components in fish oil were identified. Palmitic acid, C16:0 (35.71-45.02%), was the saturated fatty acid with the highest percentage, while oleic acid, C18:1Δ9 (10.62-25.29%)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias freshwater fish; Chemical composition; Fatty acids.. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/31014 |
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| Lima, Mário Henrique Melo e; Pires, Daniel Ananias de Assis; Moura, Marielly Maria Almeida; Costa, Renê Ferreira; Rodrigues, José Avelino Santos; Alves, Kamila Antunes. |
| This study evaluated the nutritional characteristics of hay of nineteen hybrids between sorghum and Sudan grass. The experimental design was a randomized block with nineteen treatments and three replications. The chemical characteristics of the respective hays were analyzed 52 days after sowing and 45 and 49 regrowth days. Data were analyzed by analysis of variance, and when the F test was significant, the treatment means were compared by the Scott and Knott test at 5%. Genotypes 1013026 and 1014020 showed similar dry matter content. As for ether extract content, the highest values ranged from 2.20 to 2.66%. Higher values of minerals were observed in hybrids 1013026 and 1011005. In relation to crude protein, higher content values were reported for hybrids... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrição animal; Forragicultura; Produção Animal sudan grass; Chemical composition; Digestibility.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/32524 |
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| Maciel, Gisele; Wagner, Jorge Ricardo; Juan, Nestor Antonio; San Martino, Silvina; Bartosik, Ricardo. |
| Pairs of soybean seeds and their correspondent expeller samples were collected from ten extrusion-expelling processing plants in Argentina. Seeds were analyzed for proximal composition, bulk moisture content (MC) and individual seed MC. Expeller were analyzed for proximal composition, bulk MC, protein solubility in KOH, expeller urease activity and free fatty acid content. Results indicated that average soybean composition was 136 g/kg MC, 207 g/kg oil and 391g/kg crude protein (CP), while the oil extraction efficiency (OEE) of the process was of 60.7%. The expeller composition was 922 g/kg dry matter (DM), 81g/kg oil and 442 g/kg CP. In soybean seeds, coefficient of variation (CV) of MC was 17.2%, 3.0% for CP and 5.1% for oil, while in SBE CV for DM was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soybean processing; Extrusion-expelling; Oil extraction efficiency; Chemical composition; Individual seed moisture. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5991 |
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| Garcia,Jaime; Cozzolino,Daniel. |
| The objective of the study was to evaluate the potential of near infrared reflectance (NIR) spectroscopy as a rapid method to predict the chemical composition of forage in broad-based calibration models. In total, 650 samples representing a wide range of chemical characteristics, phenological states and origins were scanned in an NIR instrument. The coefficient of determination in calibration (R²) and standard error in cross validation (SECV) for the NIR calibration models were as follows: dry matter 0.95 (SECV: 0.7%), crude protein 0.98 (SECV: 0.98%), ash 0.90 (SECV: 0.99%), in vitro organic matter digestibility 0.90 (SECV: 3.6%), acid detergent fiber 0.95 (SECV: 2.0%) and neutral detergent fiber 0.86 (SECV: 5.4%) on a dry matter basis. The results... |
| Tipo: Journal article |
Palavras-chave: Forage quality; NIR; Chemical composition; Near infrared analysis. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072006000100005 |
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| Ramos-Trejo,O. Santiago; Victoria-Graniel,C. Arturo; Sandoval-Gío,J. José. |
| Pennisetum purpureum has an extended use as forage and further knowledge related to the seasonal influence and fertilization could improve its cultivation. The effects of dry and rainy season and application of fertilizers (200-60-00), on the yield of four varieties of P. purpureum (Taiwan, OM-22, Maralfalfa, CT-115), and a homogeneous mixture of them were evaluated. The study, with four replicates, was conducted at Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias, Tizimín, México, and lasted 10 months. Dry matter (DM), crude protein, leaf/stem ratio, stalks per cluster, and plant height, were assessed. Mean values of DM of all treatments in rainy season were significantly different with respect of dry season (36 and 28 t ha-1). Dry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; Dry matter; Tropical forages; King Napier grass; Yield. |
| Ano: 2015 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000800002 |
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| MONTERO,DANIEL A.V.; MARQUES,MARCIA ORTIZ M.; MELETTI,LAURA M.M.; KAMPEN,MARIA H. VAN; POLOZZI,SANDRA C.. |
| ABSTRACT This study describes for the first time the chemical composition and olfactive description of floral scent from Brazilian Passiflora (Passiflora edulis Sim, Passiflora alata Curtis, Passiflora cincinnata Mast., Passiflora coccinea Aubl. and Passiflora quadrangularis L.). Five species were grown in greenhouse at the Agronomic Institute (IAC), São Paulo, Brazil. Volatile compounds were collected using dynamic headspace. Analyses of scent composition were performed by gas chromatograph coupled to mass spectrometer. Identification of chemical constituents was conducted through of retention index followed by comparative analysis of mass spectra with specialized databases. The olfactive descriptions of floral scent from each species was evaluated for a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; Fragrances; Olfactive description; Passiflora. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401191 |
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| Rodrigues,Jéssica Ferreira; Resende,Lívia Maria Braga; Silva,Luiz Fernando de Oliveira da; Pedroso,Márcio Pozzobon; Pinheiro,Ana Carla Marques; Nunes,Cleiton Antônio. |
| ABSTRACT This study aimed to characterize the volatile composition and sensory characteristics of virgin olive oils (VOOs) from eight olive cultivars grown in the southeast region of Brazil. The volatiles were extracted by Solid Phase Micro Extraction (SPME) and analyzed by Gas Chromatography coupled to MassSpectrometry (GC-MS). The dominant sensory attributes were determined by Temporal Dominance of Sensations (TDS). C5 and C6 alcohols and C6 aldehydes were the most abundant volatiles in the investigated VOOs. E-2-hexenal was among the majorityof volatiles in all investigated olive oils, mainly in VOOs fromcultivars Arbequina, Arbosana and Grappolo 541, in which it had the most of their chromatographic area (about 60-80%). VOOs from cultivars Maria da Fé,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; Sensory profile; Solid phase micro extraction; Edible oils. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400479 |
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| Pádua,Márcia de; Fontoura,Paulo Sérgio Growoski; Mathias,Alvaro Luiz. |
| Chemical composition of three species of Chlorophyta, Ulva lactuca, Ulva fasciata and Ulvaria oxysperma, was determined. Ulvaria oxysperma showed humidity (16-20%), ash (17-31% dry-base), proteins (6-10%db), lipids (0.5-3.2%db), fibers (3-12%db) and carbohydrates (46-72%db) which corresponded to 192-270 kcal.100g-1 (wet-base). U lactuca (15-18%db) and U fasciata (13-16%db) revealed grades slightly higher for proteins, but with similar energetic contents (250-272 and 225-239 kcal.100g-1), respectively. Natural blades of U lactuca and of U fasciata were more rigid than blades of U oxysperma. Other native algae showed higher protein levels. Ulvaria sp could be cultivated on the cotton-nylon net without having significance competition from other algae or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; Algae; Ulvaria; Ulva; Guaraqueçaba; Ilha do Mel. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000100007 |
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| Pinto,Alessandra Teixeira Barbosa; Pereira,Joyce; Oliveira,Tatiana Roselena de; Prestes,Rosilene Aparecida; Mattielo,Rodrigo Rodrigues; Demiate,Ivo Mottin. |
| This work has the objective of characterizing twenty corn landraces grown in the Campos Gerais region (Paraná State) in relation to its chemical composition (moisture, ash, protein, ether extract, dietary fiber and starch) and physical properties (weight of 1000 grains, real density, flotation index, granulometry and color). In addition, also the lab scale processing of the kernels from the varieties was carried out for producing starch; starch purity was evaluated by measuring its protein contamination. Amylose contents and viscoamylograph profile were also evaluated. The results showed that the evaluated landraces have differences in chemical composition as well as in pericarp/endosperm/germ proportions and consequently it should have different... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maize landraces; Chemical composition; Starch; Physical properties; Rapid viscoanalyzer. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000700003 |
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| Registros recuperados: 186 | |
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