108,966 research outputs found
Gennaro Perrotta. Sofocle. Messina-Milano, G. Principato
No full textBran A. Gennaro Perrotta. Sofocle. Messina-Milano, G. Principato. In: L'antiquité classique, Tome 8, fasc. 1, 1939. p. 243
Gennaro Perrotta. Sofocle. Messina-Milano, G. Principato
No full textBran A. Gennaro Perrotta. Sofocle. Messina-Milano, G. Principato. In: L'antiquité classique, Tome 8, fasc. 1, 1939. p. 243
Estabilidade e propriedades sensoriais da bebida de farelo de arroz parbolizado orgânico e os efeitos de seu consumo em ratos
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Programa de Pós-Graduação em Ciência dos Alimentos, Florianópolis, 2009O farelo de arroz estabilizado é um subproduto do beneficiamento dos grãos de arroz. O uso deste farelo vem crescendo no País devido ao seu valor nutricional e benefícios à saúde. Com o objetivo de oferecer alternativas para o consumo do farelo de arroz, foi elaborada uma bebida de extrato deste farelo em dois diferentes sabores. A bebida foi tratada termicamente e avaliada quanto à composição química, estabilidade e propriedades sensoriais, parâmetros de qualidade pertinentes ao novo produto. Os parâmetros para avaliar a vida de prateleira foram acidez titulável, pH e reologia. Foi realizado um ensaio biológico com ratos, para avaliar os efeitos do seu consumo no colesterol total e glicose e outro ensaio biológico para determinar o comportamento de ratos no nado forçado e no labirinto em cruz elevado com determinação de ACTH plasmático, além do efeito desta bebida na absorção de cálcio em ratos. A análise da composição nutricional mostrou um produto rico em ácidos graxos insaturados e minerais, especialmente, fósforo, potássio, manganês e magnésio. A reologia mostrou que a bebida obtida com este farelo estabilizado conservou-se por 20 dias sob refrigeração. A análise sensorial indicou que a bebida de farelo de arroz foi aceita dentro das formulações estabelecidas. Foi verificado que, em ratos, a bebida de farelo de arroz não apresentou efeito significativo (p>0,05) sobre o colesterol, mas apresentou efeito significativo (p0,05). Não houve efeito negativo na absorção de cálcio.The stabilized rice bran is a byproduct of processing grain of rice. Use of this meal is growing in the country because of its nutritional value and health benefits. Aiming to offer alternatives to the consumption of rice bran, was prepared for a drink of this bran extract in two different flavors. The drink was treated and evaluated as to the chemical composition, stability and sensory properties, the quality parameters relevant to the new product. The parameters to evaluate the shelf-life were acidity, pH and rheology. An assay was conducted with rats to evaluate the effects of its consumption in total cholesterol and glucose and other biological test to determine the behavior of rats in the forced swim and in the plus maze with determination of plasma ACTH, in addition to the effect of this drink in the absorption of calcium in rats. The analysis of the nutritional composition showed a product rich in unsaturated fatty acids and minerals, especially phosphorus, potassium, manganese and magnesium. The rheology showed that the drinks with the meal stabilized lasted 20 days under refrigeration. The sensory analysis indicated that the drink of rice bran was accepted into the formulations established. It was found that in rats, the drink of rice bran showed no significant effect (p> 0.05) on cholesterol, but significant effect (p 0.05). There was no negative effect on the absorption of calcium
Corn-bran: Alternative cellulosic filler for polypropylene
No full textIn this study, the use-ability of corn bran (CB) as a reinforcing filler in polypropylene (PP) matrix was investigated. The properties of CB/PP composites were compared with wood fiber (WF) filled PP composites. In order to enhance the interfacial adhesion, maleated-PP (PP-g-MAH) (MaPP) was used. The CB/PP and WF/PP composites were compounded in an Xplore laboratory compounder. The CB/PP/MaPP and WF/PP/MaPP composites were characterized by tensile test, differential scanning calorimetry (DSC), thennogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The morphology investigated by scanning electron microscopy (SEM). It was shown that corn bran can be an alternative candidate to be used as a reinforcing natural filler source for thermoplastic composites
How good are rodent models of carcinogenesis in predicting efficacy in humans? A systematic review and meta-analysis of colon chemoprevention in rats, mice and men
No full textTumours in rodent and human colon share many histological and genetic features. To know if rodent models of colon carcinogenesis are good predictors of chemopreventive efficacy in humans, we made a meta-analysis of aspirin, beta-carotene, calcium, and wheat bran studies. Controlled intervention studies of adenoma recurrence in human volunteers were compared with chemoprevention studies of carcinogen-induced tumours in rats, and of polyps in Min (Apc(+/-)) mice: 6714 volunteers, 3911 rats and 458 mice were included in the meta-analyses. Difference between models was small since most global relative risks were between 0.76 and 1.00. A closer look showed that carcinogen-induced rat studies matched human trials for aspirin, calcium, carotene, and were compatible for wheat bran. Min mice results were compatible with human results for aspirin, but discordant for calcium and wheat bran (no carotene study). These few results suggest that rodent models roughly predict effect in humans, but the prediction is not accurate for all agents. Based on three cases only, the carcinogen-induced rat model seems better than the Min mouse model. However, rodent studies are useful to screen potential chemopreventive agents, and to study mechanisms of carcinogenesis and chemoprevention
Processing of commercial rice bran for the production of fat and nutraceutical rich rice brokens, rice germ and pure bran.
No full textSuccessive sieving of commercial rice bran on the basis of particle size was performed and different
fractions were obtained of which the rice brokens and rice germ fractions contained fat 33 g/kg and
207 g/kg, oryzanol 400 mg/kg and 874 mg/kg, total tocols (tocopherols and tocotrienols) 16.5 mg/kg and
87.8 mg/kg, and total phytosterols 128.7 mg/kg and 769.6 mg/kg respectively, thus indicating that these
fractions are a good source of fat and nutraceuticals. The residual fat (6 g/kg) from commercial defatted
rice bran contained high oryzanol content of 4.8 g/100 g, indicating that commercial defatted rice bran as
a source of oryzanol. The fat from pure rice bran fraction of commercial rice bran decreased in the color
value (48.5%) indicating that sieving could also improve the quality of crude rice bran oils
Composition and average content of 100 g of wheat bran.
No full text<p><sup>a</sup>unit: g</p><p><sup>b</sup>unit: mg</p><p>Composition and average content of 100 g of wheat bran.</p
Utilization of maize bran-based diets supplemented with Roxazyme G2 G by broilers
No full textOne hundred and fifty broilers (Abor AcrePlus Strain) were randomly assigned to 5 dietary treatments of 3 replicates each. Five diets (Diet 1: basal, maize-based, with no Roxazyme G2 G enzyme; Diet 2: 20% maize bran with Roxazyme G2 G; Diet 3: 20% maize bran without Roxazyme G2 G; Diet 4: 40% maize bran with Roxazyme G2 G and Diet 5: 40% maize bran without Roxazyme G2 G) were formulated and offered to the birds. The aim was to compare the performance of the birds on the enzyme-supplemented diets and the unsupplemented diets with those on the maize-based diets. Feed intake and weight gain were significantly (
A comparison of the HIPERLAN/2 and IEEE 802.11a wireless LAN standards
No full textAt present, WLANs supporting broadband multimedia communication are being developed and standardized around the world. Standards include HIPERLAN/2, defined by ETSI BRAN, 802.11a, defined by the IEEE, and HiSWANa defined by MMAC. These systems provide channel adaptive data rates up to 54 Mb/s (in a 20 MHz channel spacing) in the 5 GHz radio band. In this article an overview of the HIPERLAN/2 and 802.11a standards is presented together with software simulated physical layer performance results for each of the defined transmission modes. Furthermore, the differences between these two standards are highlighted (packet size, upper protocol layers etc.), and the effects of these differences on throughput are analyzed and discussed
Evaluasi Pemalsuan Dedak Padi dengan Penambahan Tepung Kulit Kacang Tanah Menggunakan Uji Fisik
No full textThe objective of this research was to evaluate the physical properties of forgery rice bran with the addition peanut hull flour levels. This research was designed by Completely Randomize Design with 5 treatments i.e P0 (100% rice bran), P1 (95% rice bran + 5% peanut hull flour), P2 (90% rice bran + 10% peanut hull flour), P3 (85% rice bran + 15% peanut hull flour) and P4 (80% rice bran + 20% peanut hull flour) and 3 replications. Data were analyzed by the analysis of variance (ANOVA) and any significant results were futher analyzed by contrast orthogonal test. The addition of peanut hull flour 0%, 5%, 10%, 15% and 20% on treatment showed a significant influence (P<0.01) in a decrease specific gravity (1.21 kg l-1, 1.19 kg l-1, 1.18 kg l-1, 1.17 kg l-1 and 1.16 kg l-1), bulk density (340.52 g l-1, 332.96 g l-1, 323.98 g l-1, 316.46 g l-1 and 308.01 g l-1), compacted bulk density (525.40 g l-1, 514.58 g l-1, 498.35 g l-1, 487.02 g l-1 and 473.94 g l-1), and angle of repose (41.60o, 41.12o, 40.69o, 40.40o and 39.91o). The bulk density has the highest correlation value (r = 99.69%) compared the other physical properties
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