|
|
|
|
| |
|
|
| Pereira,Edimir A.; Brandão,Edimir M.; Borges,Soraia V.; Maia,Maria C. A.. |
| In this experimental work the rheological behavior of umbu pulp has been studied by shear flow (pseudoplasticity, apparent viscosity) and in oscillatory mode (dynamic modules) in the linear domain of viscoelasticity. The studies were carried out with the use of a controlled stress Rheometer Haake RS 100, at different soluble solid concentrations (10, 15, 20 and 25 °Brix), measured at 30 °C. Tests in steady shear were conducted over a shear rate range of 0.1 - 300 s-1 and oscillatory measurements over a frequency range of 0.01 - 100 Hz. The results indicated that umbu pulp behaves as a non-Newtonian fluid, with pseudoplastic characteristics and yield stress appearance and exhibits tixotropic properties. Rheograms were fitted to the Herschel-Bulkey model.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Viscosity; Viscoelasticity; Soluble solid content (°Brix). |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662008000100013 |
| |
|
|
| Assad-Bustillos,Melissa; Ramírez-Gilly,Mariana; Tecante,Alberto; Chaires-Martínez,Leandro. |
| Huauzontle seeds (Chenopodium berlandieri spp. nuttalliae) are produced in the central part of Mexico but their use is limited to seedling process. Thus, in order to diversify their applications it is necessary to study their components such as proteins and starch. Therefore, the objective of this study was to extract and characterize the starch contained in the seeds of huauzontle by means of chemical and physical techniques. Analysis of the results showed 50 % extraction yield, 72.5 % starch purity, 5.32 % moisture, 1.09 % ash, 0.083 % fat, 11.4 % total nitrogen, and 4.13 % crude fiber. The amylose content was 10.5 %, which suggests that huauzontle starch gels could have a low tendency to retrograde. Swelling and solubility were similar to reported... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chenopodium berlandieri; Rheology; Starch; Viscoelasticity; Microscopic structure. |
| Ano: 2014 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000800003 |
| |
|
|
| Alves-Neto,O.; Tavares,P.; Rocco,P.R.M.; Zin,W.A.. |
| Ketamine is believed to reduce airway and pulmonary tissue resistance. The aim of the present study was to determine the effects of ketamine on the resistive, elastic and viscoelastic/inhomogeneous mechanical properties of the respiratory system, lungs and chest wall, and to relate the mechanical data to findings from histological lung analysis in normal animals. Fifteen adult male Wistar rats were assigned randomly to two groups: control (N = 7) and ketamine (N = 8). All animals were sedated (diazepam, 5 mg, ip) and anesthetized with pentobarbital sodium (20 mg/kg, ip) or ketamine (30 mg/kg, ip). The rats were paralyzed and ventilated mechanically. Ketamine increased lung viscoelastic/inhomogeneous pressure (26%) compared to the control group. Dynamic and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ketamine; Elastance; Lung tissue; Resistive pressure; Viscoelasticity; Rat. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000900016 |
| |
|
|
|
