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Pesquisa : B01.650.940.800.575.912.250.822.355 [Categoria DeCS]
Referências encontradas : 59 [refinar]
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[PMID]:28873585
[Au] Autor:Zhu F
[Ad] Endereço:School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand. Electronic address: fzhu5@yahoo.com.
[Ti] Título:Chemical composition and food uses of teff (Eragrostis tef).
[So] Source:Food Chem;239:402-415, 2018 Jan 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Teff (Eragrostis tef) is a cereal native to Ethiopia and Eritrea. It has an excellent adaptability to harsh environmental conditions and plays an important role in food security. In recent years, teff is becoming globally popular due to the attractive nutritional profile such as gluten free and high dietary fiber content. This review documents the recent advances in the genetic diversity, nutritional composition and food uses of teff grain. The attractive nutrients of teff include protein, dietary fiber, polyphenols, and certain minerals. Whole grain teff flour becomes increasingly important in healthy food market, and has been used to produce various gluten free food items such as pasta and bread. Efforts have been made to enhance the sensory quality of teff based products. There is great potential to adapt teff to the other parts of the world for healthy food and beverage production.
[Mh] Termos MeSH primário: Eragrostis
[Mh] Termos MeSH secundário: Pão
Grãos Comestíveis
Farinha
Triticum
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170907
[St] Status:MEDLINE


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[PMID]:28532148
[Au] Autor:Di Ghionno L; Marconi O; Lee EG; Rice CJ; Sileoni V; Perretti G
[Ti] Título:Gluten-Free Sources of Fermentable Extract: Effect of Temperature and Germination Time on Quality Attributes of Teff [Eragrostis tef (zucc.) Trotter] Malt and Wort.
[So] Source:J Agric Food Chem;65(23):4777-4785, 2017 Jun 14.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This study was conducted to evaluate the behavior of a white teff variety called Witkop during malting by using different parameters (germination temperature and duration) and to identify the best malting program. Samples were evaluated for standard quality malt and wort attributes, pasting characteristics, ß-glucan and arabinoxylan content, and sugar profile. It was concluded that malting teff at 24 °C for 6 days produced acceptable malt in terms of quality attributes and sugar profile for brewing. The main attributes were 80.4% extract, 80.9% fermentability, 1.53 mPa s viscosity, 7.4 EBC-U color, 129 mg/L FAN, and 72.1 g/L of total fermentable sugars. Statistical analysis showed that pasting characteristics of teff malt were negatively correlated with some malt quality attributes, such as extract and fermentability. Witkop teff appeared to be a promising raw material for malting and brewing. However, the small grain size may lead to difficulties in handling malting process, and a bespoke brewhouse plant should be developed for the production at industrial scale.
[Mh] Termos MeSH primário: Cerveja/análise
Eragrostis/química
Glutens/análise
Sementes/química
[Mh] Termos MeSH secundário: Eragrostis/crescimento & desenvolvimento
Fermentação
Germinação
Extratos Vegetais/análise
Sementes/crescimento & desenvolvimento
Temperatura Ambiente
Viscosidade
Xilanos/análise
beta-Glucanas/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Extracts); 0 (Xylans); 0 (beta-Glucans); 8002-80-0 (Glutens); 9040-27-1 (arabinoxylan)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170626
[Lr] Data última revisão:
170626
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170524
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b01717


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[PMID]:28419145
[Au] Autor:Rodrigo JM; Zappacosta DC; Selva JP; Garbus I; Albertini E; Echenique V
[Ad] Endereço:CERZOS-CONICET, CCT-Bahía Blanca, Bahía Blanca, Argentina.
[Ti] Título:Apomixis frequency under stress conditions in weeping lovegrass (Eragrostis curvula).
[So] Source:PLoS One;12(4):e0175852, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:To overcome environmental stress, plants develop physiological responses that are triggered by genetic or epigenetic changes, some of which involve DNA methylation. It has been proposed that apomixis, the formation of asexual seeds without meiosis, occurs through the temporal or spatial deregulation of the sexual process mediated by genetic and epigenetic factors influenced by the environment. Here, we explored whether there was a link between the occurrence of apomixis and various factors that generate stress, including drought stress, in vitro culture, and intraspecific hybridization. For this purpose, we monitored the embryo sacs of different weeping lovegrass (Eragrostis curvula [Schrad.] Nees) genotypes after the plants were subjected to these stress conditions. Progeny tests based on molecular markers and genome methylation status were analyzed following the stress treatment. When grown in the greenhouse, the cultivar Tanganyika INTA generated less than 2% of its progeny by sexual reproduction. Plants of this cultivar subjected to different stresses showed an increase of sexual embryo sacs, demonstrating an increased expression of sexuality compared to control plants. Plants of the cv. Tanganyika USDA did not demonstrate the ability to generate sexual embryo sacs under any conditions and is therefore classified as a fully apomictic cultivar. We found that this change in the prevalence of sexuality was correlated with genetic and epigenetic changes analyzed by MSAP and AFLPs profiles. Our results demonstrate that different stress conditions can alter the expression of sexual reproduction in facultative tetraploid apomictic cultivars and when the stress stops the reproductive mode shift back to the apomixis original level. These data together with previous observations allow us to generate a hypothetical model of the regulation of apomixis in weeping lovegrass in which the genetic/s region/s that condition apomixis, is/are affected by ploidy, and is/are subjected to epigenetic control.
[Mh] Termos MeSH primário: Apomixia
Eragrostis/genética
Eragrostis/fisiologia
Sementes/fisiologia
[Mh] Termos MeSH secundário: Metilação de DNA
Secas
Epigênese Genética
Eragrostis/embriologia
Regulação da Expressão Gênica de Plantas
Genótipo
Hibridização Genética
Ploidias
Sementes/embriologia
Sementes/genética
Estresse Fisiológico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170505
[Lr] Data última revisão:
170505
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170419
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0175852


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[PMID]:28046149
[Au] Autor:Clark JK; Shanks BC; Jogan KS; Philipp D; Coffey KP; Jack NE; Caldwell JD; Rhein RT
[Ti] Título:Effects of forage species and poultry litter application timing on forage preference by horses.
[So] Source:J Anim Sci;94(12):4985-4992, 2016 Dec.
[Is] ISSN:1525-3163
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Bermudagrass ( L.) is a familiar forage in the equine industry and teff () is gaining popularity as well. However, it is unclear if the application of poultry litter as a fertilizer affects palatability of these forages in horses. Therefore, the objective of this study was to determine if forage species and timing of litter application as a fertilizer has an effect on preference by horses. Hay treatments were arranged in a 2 × 3 factorial treatment arrangement consisting of teff and bermudagrass harvested after no poultry litter application (NL), poultry litter applied to stubble immediately after removal of the previous cutting (L0), or poultry litter applied 14 d after the previous cutting (L14). Mature, stock-type geldings ( = 5; 480 ± 52.9 kg) were used in this study arranged as a balanced incomplete block design. Horses were offered different combinations of 4 of the 6 total forages daily for 3 d in each of 3 evaluation periods that immediately followed a 10-d adaptation period. Each forage was offered at half of the total daily DMI as measured during the last 5 d of the 10-d adaptation period to encourage selection among the 4 forages. Each hay offered was randomly allocated to a corner and suspended in hay nets over muck buckets in the corners of each stall. Horses were individually housed in 3.6- by 3.6-m indoor stalls with sand bedding and access to 3.6- by 7.6-m outdoor runs. Along with hay, horses were offered oats twice daily at 0.125% of BW at each feeding. Dry matter intake was greater ( < 0.01) for bermudagrass than for teff and for NL and L0 treatments compared with L14 treatments. Horses spent more ( < 0.01) time consuming bermudagrass compared with teff. However, there were no differences ( ≥ 0.25) in time spent consuming hay across litter treatments. Therefore, horses may prefer bermudagrass to teff and later application of poultry litter may affect voluntary intake by horses. However, all forages were mature, which may have impacted total intake and preference.
[Mh] Termos MeSH primário: Ração Animal/análise
Cynodon/química
Cavalos/fisiologia
[Mh] Termos MeSH secundário: Animais
Dieta/veterinária
Eragrostis
Fertilizantes
Masculino
Esterco
Aves Domésticas
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fertilizers); 0 (Manure)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170104
[St] Status:MEDLINE
[do] DOI:10.2527/jas.2016-0564


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[PMID]:27285925
[Au] Autor:Lopez R; Pulsipher GD; Guerra-Liera JE; Soto-Navarro SA; Balstad LA; Petersen MK; Dhuyvetter DV; Brown MS; Krehbiel CR
[Ti] Título:Effects of fat and/or methionine hydroxy analog added to a molasses-urea-based supplement on ruminal and postruminal digestion and duodenal flow of nutrients in beef steers consuming low-quality lovegrass hay.
[So] Source:J Anim Sci;94(6):2485-96, 2016 Jun.
[Is] ISSN:1525-3163
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Five crossbred beef steers (initial BW = 338.6 ± 7.8 kg) fitted with ruminal and duodenal cannulas were used in a 5 × 5 Latin square design experiment to evaluate the effects of methionine hydroxy analog (MHA) and/or yellow grease (fat) added to a molasses-urea-based supplement on intake and characteristics of digestion. Steers were fed low-quality hay (long-stem lovegrass : 3.3% CP, 76.8% NDF; DM basis) ad libitum and supplemented with 0.91 kg/d (as fed) of 1 of 4 supplements in a 2 × 2 + 1 factorial arrangement of treatments. Supplemental treatments were 1) control (no supplement, NC); 2) molasses-urea liquid supplement (U); 3) U containing (as-fed basis) 1.65% MHA (UM); 4) U containing (as-fed basis) 12% fat (UF); and 5) U containing (as-fed basis) 1.65% MHA and 12% fat (UMF). Total and forage OM intake (kg/d and as % of BW) increased ( < 0.01) with molasses-urea, decreased ( ≤ 0.04) with MHA, and were not affected ( = 0.61) with fat supplementation. Total tract NDF digestibility increased ( = 0.01) with molasses-urea supplementation, and was less ( = 0.01) for fat than for nonfat supplementation. Total and microbial N flowing to the duodenum increased ( = 0.01) with molasses-urea supplementation. Although, total N flowing to duodenum was not affected ( = 0.27), microbial N decreased ( = 0.01), and nonammonia nonmicrobial N (NANMN) increased ( = 0.01) with fat supplementation. Extent of in situ OM and NDF digestibility at 96 h increased ( = 0.01) with molasses-urea supplementation, but were not affected ( ≥ 0.14) by either MHA or fat supplementation. Duodenal flow of total AA, essential AA, and nonessential AA increased ( ≤ 0.02) with molasses-urea supplementation. Total and nonessential serum AA concentration decreased ( < 0.01) with molasses-urea supplementation. Total ruminal VFA concentration increased ( = 0.01) with molasses-urea supplementation, and was not affected ( ≥ 0.14) by MHA or fat supplementation. Fat can be used in molasses-urea liquid supplements for cattle consuming low-quality forage to increase energy intake without negatively affecting forage intake or characteristics of digestion. However, adding MHA did not further improve the response to urea supplementation of cattle consuming low-quality forage. Conversely, the inclusion of MHA on urea supplement decreased forage intake.
[Mh] Termos MeSH primário: Ração Animal
Suplementos Nutricionais
Digestão/fisiologia
Duodeno/metabolismo
Eragrostis
Gorduras
Metionina/análogos & derivados
Rúmen/metabolismo
[Mh] Termos MeSH secundário: Animais
Bovinos
Duodeno/microbiologia
Ingestão de Energia
Fermentação
Masculino
Metionina/metabolismo
Melaço
Carne Vermelha
Rúmen/microbiologia
Ureia/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fats); 583-91-5 (alpha-hydroxy-gamma-methylmercaptobutyric acid); 8W8T17847W (Urea); AE28F7PNPL (Methionine)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160611
[St] Status:MEDLINE
[do] DOI:10.2527/jas.2015-0228


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[PMID]:27190000
[Au] Autor:Zhang W; Xu J; Bennetzen JL; Messing J
[Ad] Endereço:Waksman Institute of Microbiology, Rutgers University.
[Ti] Título:Teff, an Orphan Cereal in the Chloridoideae, Provides Insights into the Evolution of Storage Proteins in Grasses.
[So] Source:Genome Biol Evol;8(6):1712-21, 2016 06 13.
[Is] ISSN:1759-6653
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Seed storage proteins (SSP) in cereals provide essential nutrition for humans and animals. Genes encoding these proteins have undergone rapid evolution in different grass species. To better understand the degree of divergence, we analyzed this gene family in the subfamily Chloridoideae, where the genome of teff (Eragrostis tef) has been sequenced. We find gene duplications, deletions, and rapid mutations in protein-coding sequences. The main SSPs in teff, like other grasses, are prolamins, here called eragrostins. Teff has γ- and δ-prolamins, but has no ß-prolamins. One δ-type prolamin (δ1) in teff has higher methionine (33%) levels than in maize (23-25%). The other δ-type prolamin (δ2) has reduced methionine residues (<10%) and is phylogenetically closer to α prolamins. Prolamin δ2 in teff represents an intermediate between δ and α types that appears to have been lost in maize and other Panicoideae, and was replaced by the expansion of α-prolamins. Teff also has considerably larger numbers of α-prolamin genes, which we further divide into five sub-groups, where α2 and α5 represent the most abundant α-prolamins both in number and in expression. In addition, indolines that determine kernel softness are present in teff and the panicoid cereal called foxtail millet (Setaria italica) but not in sorghum or maize, indicating that these genes were only recently lost in some members of the Panicoideae Moreover, this study provides not only information on the evolution of SSPs in the grass family but also the importance of α-globulins in protein aggregation and germplasm divergence.
[Mh] Termos MeSH primário: Eragrostis/genética
Evolução Molecular
Prolaminas/genética
Proteínas de Armazenamento de Sementes/genética
[Mh] Termos MeSH secundário: Grãos Comestíveis/genética
Deleção de Genes
Duplicação Gênica/genética
Genoma de Planta
Mutação
Filogenia
Sorghum/genética
Zea mays/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Prolamins); 0 (Seed Storage Proteins)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170302
[Lr] Data última revisão:
170302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160519
[St] Status:MEDLINE
[do] DOI:10.1093/gbe/evw117


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[PMID]:26919613
[Au] Autor:Bremm C; Carvalho PC; Fonseca L; Amaral GA; Mezzalira JC; Perez NB; Nabinger C; Laca EA
[Ad] Endereço:Grazing Ecology Research Group, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
[Ti] Título:Diet Switching by Mammalian Herbivores in Response to Exotic Grass Invasion.
[So] Source:PLoS One;11(2):e0150167, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Invasion by exotic grasses is a severe threat to the integrity of grassland ecosystems all over the world. Because grasslands are typically grazed by livestock and wildlife, the invasion is a community process modulated by herbivory. We hypothesized that the invasion of native South American grasslands by Eragrostis plana Nees, an exotic tussock-forming grass from Africa, could be deterred by grazing if grazers switched dietary preferences and included the invasive grass as a large proportion of their diets. Bos taurus (heifers) and Ovis aries (ewes) grazed plots with varying degrees of invasion by E. plana in a replicated manipulative experiment. Animal positions and species grazed were observed every minute in 45-min grazing session. Proportion of bites and steps in and out of E. plana tussocks were measured and used to calculate several indices of selectivity. Both heifers and ewes exhibited increasing probability of grazing E. plana as the proportion of area covered by tussocks increased, but they behaved differently. In agreement with expectations based on the allometry of dietary preferences and morphology, ewes consumed a low proportion of E. plana, except in areas that had more than 90% E. plana cover. Heifers consumed proportionally more E. plana than ewes. Contrary to our hypothesis, herbivores did not exhibit dietary switching towards the invasive grass. Moreover, they exhibited avoidance of the invasive grass and preference for short-statured native species, both of which should tend to enhance invasion. Unless invasive plants are highly palatable to livestock, the effect of grazing to deter the invasion is limited, due to the inherent avoidance of the invasive grass by the main grazers in the ecosystem, particularly sheep.
[Mh] Termos MeSH primário: Bovinos/psicologia
Dieta
Eragrostis
Comportamento Alimentar
Herbivoria
Espécies Introduzidas
Ovinos/psicologia
[Mh] Termos MeSH secundário: Distribuição Animal
Animais
Biodiversidade
Tamanho Corporal
Brasil
Bovinos/fisiologia
Ecossistema
Feminino
Preferências Alimentares
Dispersão Vegetal
Ovinos/fisiologia
Especificidade da Espécie
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1607
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160227
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0150167


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[PMID]:26833063
[Au] Autor:Gebre YG; Bertolini E; Pè ME; Zuccolo A
[Ad] Endereço:Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33-56127, Pisa, Italy. y.gebre@sssup.it.
[Ti] Título:Identification and characterization of abundant repetitive sequences in Eragrostis tef cv. Enatite genome.
[So] Source:BMC Plant Biol;16:39, 2016 Feb 01.
[Is] ISSN:1471-2229
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Eragrostis tef is an allotetraploid (2n = 4 × = 40) annual, C4 grass with an estimated nuclear genome size of 730 Mbp. It is widely grown in Ethiopia, where it provides basic nutrition for more than half of the population. Although a draft assembly of the E. tef genome was made available in 2014, characterization of the repetitive portion of the E. tef genome has not been a subject of a detailed analysis. Repetitive sequences constitute most of the DNA in eukaryotic genomes. Transposable elements are usually the most abundant repetitive component in plant genomes. They contribute to genome size variation, cause mutations, can result in chromosomal rearrangements, and influence gene regulation. An extensive and in depth characterization of the repetitive component is essential in understanding the evolution and function of the genome. RESULTS: Using new paired-end sequence data and a de novo repeat identification strategy, we identified the most repetitive elements in the E. tef genome. Putative repeat sequences were annotated based on similarity to known repeat groups in other grasses. Altogether we identified 1,389 medium/highly repetitive sequences that collectively represent about 27% of the teff genome. Phylogenetic analyses of the most important classes of TEs were carried out in a comparative framework including paralog elements from rice and maize. Finally, an abundant tandem repeat accounting for more than 4% of the whole genome was identified and partially characterized. CONCLUSIONS: Analyzing a large sample of randomly sheared reads we obtained a library of the repetitive sequences of E. tef. The approach we used was designed to avoid underestimation of repeat contribution; such underestimation is characteristic of whole genome assembly projects. The data collected represent a valuable resource for further analysis of the genome of this important orphan crop.
[Mh] Termos MeSH primário: DNA de Plantas
Eragrostis/genética
Genoma de Planta
Sequências Repetitivas de Ácido Nucleico
[Mh] Termos MeSH secundário: Elementos de DNA Transponíveis
Eragrostis/classificação
Biblioteca Gênica
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA Transposable Elements); 0 (DNA, Plant)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160203
[St] Status:MEDLINE
[do] DOI:10.1186/s12870-016-0725-4


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[PMID]:26572436
[Au] Autor:Maphalla TG; Emmambux MN
[Ad] Endereço:University of Pretoria, Department of Food Science, Private Bag X20, Hatfield, Pretoria 0028, South Africa.
[Ti] Título:Functionality of maize, wheat, teff and cassava starches with stearic acid and xanthan gum.
[So] Source:Carbohydr Polym;136:970-8, 2016 Jan 20.
[Is] ISSN:1879-1344
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Consumer concerns to synthetic chemicals have led to strong preference for 'clean' label starches. Lipid and hydrocolloids are food friendly chemicals. This study determines the effects of stearic acid and xanthan gum alone and in combination on the functionality of maize, wheat, teff and cassava starches. An increase in viscosity was observed for all starches with stearic acid and xanthan gum compared to the controls with cassava having the least increase. A further increase in viscosity was observed for the cereal starches with combination of stearic acid and xanthan gum. Stearic acid reduced retrogradation, resulting in soft textured pastes. Combination of stearic acid and xanthan gum reduced the formation of type IIb amylose-lipid complexes, syneresis, and hysteresis in cereal starches compared to stearic acid alone. A combination of stearic acid and xanthan gum produce higher viscosity non-gelling starches and xanthan gum addition increases physical stability to freezing and better structural recovery after shear.
[Mh] Termos MeSH primário: Amilose/química
Polissacarídeos Bacterianos/química
Ácidos Esteáricos/química
[Mh] Termos MeSH secundário: Eragrostis/química
Lipídeos/química
Manihot/química
Resistência ao Cisalhamento
Triticum/química
Viscosidade
Zea mays/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Lipids); 0 (Polysaccharides, Bacterial); 0 (Stearic Acids); 4ELV7Z65AP (stearic acid); 9005-82-7 (Amylose); TTV12P4NEE (xanthan gum)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151117
[Lr] Data última revisão:
151117
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151118
[St] Status:MEDLINE


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[PMID]:25656865
[Au] Autor:Chufo A; Yuan H; Zou D; Pang Y; Li X
[Ad] Endereço:Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; College of Natural Science, Arba Minch University, Arba Minch, Ethiopia.
[Ti] Título:Biomethane production and physicochemical characterization of anaerobically digested teff (Eragrostis tef) straw pretreated by sodium hydroxide.
[So] Source:Bioresour Technol;181:214-9, 2015 Apr.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The biogas production potential and biomethane content of teff straw through pretreatment by NaOH was investigated. Different NaOH concentrations (1%, 2%, 4% and 6%) were used for each four solid loadings (50, 65, 80 and 95 g/L). The effects of NaOH as pretreatment factor on the biodegradability of teff straw, changes in main compositions and enhancement of anaerobic digestion were analyzed. The result showed that, using 4% NaOH for pretreatment in 80 g/L solid loading produced 40.0% higher total biogas production and 48.1% higher biomethane content than the untreated sample of teff straw. Investigation of changes in chemical compositions and physical microstructure indicated that there was 4.3-22.1% total lignocellulosic compositions removal after three days pretreatment with NaOH. The results further revealed that NaOH pretreatment changed the structural compositions and lignin network, and improved biogas production from teff straw.
[Mh] Termos MeSH primário: Biocombustíveis
Biotecnologia/métodos
Eragrostis/metabolismo
Metano/biossíntese
Hidróxido de Sódio/farmacologia
Resíduos
[Mh] Termos MeSH secundário: Anaerobiose
Eragrostis/efeitos dos fármacos
Concentração de Íons de Hidrogênio
Lignina/química
Esgotos
Volatilização
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Biofuels); 0 (Sewage); 0 (Waste Products); 11132-73-3 (lignocellulose); 55X04QC32I (Sodium Hydroxide); 9005-53-2 (Lignin); OP0UW79H66 (Methane)
[Em] Mês de entrada:1511
[Cu] Atualização por classe:150224
[Lr] Data última revisão:
150224
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150207
[St] Status:MEDLINE



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