Xanthan Gum
Mostrando 13-24 de 82 artigos, teses e dissertações.
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13. Properties of films obtained from biopolymers of different origins for skin lesions therapy
In this study, the effects of the origin of xanthan used, in combination with chitosan, to prepare films for the treatment of skin lesions were evaluated. The characteristics of the films obtained with xanthan commercially available for the food industry sector and xanthan originated from a fermentation process conducted in a pilot plant were compared. Resul
Braz. arch. biol. technol.. Publicado em: 2015-04
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14. DETERMINAÇÃO DE Cd E Pb EM AMOSTRAS DE GOMA XANTANA POR GF AAS
This paper describes the evaluation of a method for determination of Cd and Pb in xanthan gum samples by Graphite Furnace Atomic Absorption Spectrometry (GF AAS) using NH4H2PO4 as the chemical modifier. The sample preparation was performed using a reflux system adapted in the digestion tubes. With this system it was possible to increase the temperature of th
Quím. Nova. Publicado em: 2015-02
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15. The effect of the inner cylinder rotation on the fluid dynamics of non-Newtonian fluids in concentric and eccentric annuli
Helical flow in an annular space occurs during oil drilling operations. The correct prediction of flow of drilling fluid in an annular space between the wellbore wall and the drill pipe is essential to determine the variation in fluid pressure within the wellbore. This paper presents experimental and CFD simulation results of the pressure drop in the flow of
Braz. J. Chem. Eng.. Publicado em: 2014-12
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16. Bioconversion from crude glycerin by Xanthomonas campestris 2103: xanthan production and characterization
The production and rheological properties of xanthan gum from crude glycerin fermentation, a primary by-product of the biodiesel industry with environmental and health risks, were evaluated. Batch fermentations (28 °C/250 rpm /120 h) were carried out using crude glycerin, 0.01% urea and 0.1% KH2PO4, (% w/v), and compared to a sucrose control under the same
Braz. J. Chem. Eng.. Publicado em: 2013-12
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17. Use of green coconut shells as an alternative substrate for the production of xanthan gum on different scales of fermentation
Xanthan, a biopolymer with extensive industrial applications, is commercially produced by fermenting glucose or sucrose using the bacteria Xanthomonas. Green coconut shells, rich in nutrients, could be an alternative substrate to obtain xanthan. This study aimed to evaluate the production and rheological properties of xanthan obtained on different fermentati
Polímeros. Publicado em: 2013
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18. Experimental investigation of the enhanced oil recovery process using a polymeric solution
Enhanced oil recovery methods are becoming an important source of oil production of wells that have already been explored and, by these methods, of increase of the total volume of oil extracted. An important example is the injection of polymeric solutions after the injected water has reached the breakthrough point. In the present work an experimental apparat
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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19. Efeito do congelamento sobre a microestrutura da massa do pão. / Effect of freezing on the microstructure of frozen bread dough.
A qualidade global da massa de pão congelada por um longo período é um desafio para indústria de panificação. O uso de diferentes técnicas pode ajudar a explicar os danos sofridos à massa de pão durante o congelamento e armazenamento congelado. A presença de água na forma de cristais de gelo foi vista como a principal causa de defeitos à estrutur
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011
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20. Avaliação in vitro e in situ do potencial erosivo do suco de laranja modificado por cálcio e alguns polímeros alimentares / In vitro and in situ evaluation of the erosive potential of the orange juice modified with calcium and some food-approved polimers
O objetivo deste trabalho foi avaliar in vitro e in situ o potencial erosivo do suco de laranja modificado por cálcio e alguns polímeros alimentares. Este estudo foi dividido em quatro fases. Na primeira, as seguintes substâncias: lactato de cálcio (Ca), goma xantana (XG), hexametafosfato de sódio (HMP), tripolifosfato de sódio (STP), pirofosfato de s�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2011
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21. Properties of extruded xanthan-starch-clay nanocomposite films
The aim of this work was to manufacture the biodegradable nanocomposite films by extrusion from different combinations of cassava starch, xanthan gum and nanoclays (sodium montmorillonite - MMT- Na) and to characterize them according to their microstructure, optical, mechanical and barrier properties. Films were manufactured from nine starch/xanthan/nanoclay
Brazilian Archives of Biology and Technology. Publicado em: 2011-12
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22. Development and evaluation of a hydrophilic matrix as a buccoadhesive system containing diclofenac sodium
The aim of this work was to study the development and evaluation of a hydrolphilic matrix as a buccoadhesive system containing diclofenac sodium. Eleven formulations were prepared containing the following bioadhesive polymers: hydroxylpropylmethylcellulose, polycarbophil, guar gum and xanthan gum individually and in combination. All the formulations were eva
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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23. Dynamic and steady: shear rheological properties of xanthan and guar gums dispersed in yellow passion fruit pulp (Passiflora edulis f. flavicarpa)
Yellow passion fruit pulp is unstable, presenting phase separation that can be avoided by the addition of hydrocolloids. For this purpose, xanthan and guar gum [0.3, 0.7 and 1.0% (w/w)] were added to yellow passion fruit pulp and the changes in the dynamic and steady - shear rheological behavior evaluated. Xanthan dispersions showed a more pronounced pseudop
Brazilian Journal of Chemical Engineering. Publicado em: 2011-09
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24. Formulation and evaluation of xanthan gum based aceclofenac tablets for colon targeted drug delivery
O presente estudo teve como objetivo o desenvolvimento de sistema de liberação cólon-alvo de aceclofenaco empregando goma xantana. Nesse trabalho, o revestimento de múltiplas camadas com característica de resistência às condições do intestino delgado além de gastrorresistência oferece como vantagem a rápida degradação desse sistema por enzimas
Brazilian Journal of Pharmaceutical Sciences. Publicado em: 2011-06