scholarly journals  Effect of thickening agents on perceived viscosity  and acidity of model beverages

2012 ◽  
Vol 30 (No. 5) ◽  
pp. 442-445 ◽  
Author(s):  
Z. Panovská ◽  
A. Váchová ◽  
J. Pokorný
Keyword(s):  
Viscosity Solutions ◽  
Carboxymethyl Cellulose ◽  
Kinematic Viscosity ◽  
Xanthan Gum ◽  
Methyl Cellulose ◽  
High Viscosity ◽  
Sodium Carboxymethyl Cellulose ◽  
Hydroxyethyl Cellulose ◽  
Low Viscosity ◽  
Thickening Agents

The effect of thickening agents &ndash; methyl cellulose, hydroxyethyl cellulose, sodium carboxymethyl cellulose, and xanthan gum &ndash; solutions on the sensory viscosity was investigated in the concentration range of 0&ndash;0.8%. The perceived viscosity was proportional to the logarithm of kinematic viscosity in the presence of citric and malic acids. The viscosity was inversely proportional to the acidity at the viscosity levels higher than 10 mm<sup>2</sup>/s. A liquid of high viscosity thus possess lower acidity than aqueous or low-viscosity solutions. No significant differences were found between the effects of different thickening agents. &nbsp;

Tailored IPN Hydrogel Bead of Sodium Carboxymethyl Cellulose and Sodium Carboxymethyl Xanthan Gum for Controlled Delivery of Diclofenac Sodium

2013 ◽  
Vol 52 (8) ◽  
pp. 795-805 ◽  
Author(s):  
Shiv Sankar Bhattacharya ◽  
Seema Shukla ◽  
Subham Banerjee ◽  
Purojit Chowdhury ◽  
Prithviraj Chakraborty ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Xanthan Gum ◽  
Diclofenac Sodium ◽  
Controlled Delivery ◽  
Sodium Carboxymethyl Cellulose ◽  
Hydrogel Bead

scholarly journals Studying the Rheological Properties of Non-Newtonian Fluids Under the Addition of Different Chemical Additives

2020 ◽  
Vol 23 (1) ◽  
pp. 68-80
Author(s):  
Douaa Hussein Ali ◽  
Muhannad A.R. Mohammed
Keyword(s):  
Sodium Chloride ◽  
Polyvinyl Alcohol ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Xanthan Gum ◽  
Methyl Cellulose ◽  
Carboxy Methyl Cellulose ◽  
Chemical Additives ◽  
Low Viscosity ◽  
Carboxy Methyl

This research study the rheological properties ( plastic viscosity, yield point and apparent viscosity) of non-Newtonian fluids under the addition of different chemical additives with different concentrations, such as (xanthan gum (xc-polymer) , carboxy methyl cellulose ( high and low viscosity ) ,polyacrylamide, polyvinyl alcohol, starch, quebracho, chrome lignosulfonate, and sodium chloride (NaCl). Fann viscometer model 800 with 8-speeds was used to measure the rheological properties of these samples, that have already been prepared. All samples were subjected to Bingham plastic model. It was concluded that the plastic viscosity, yield point and apparent viscosity should be increased with increasing the concentrations of (xanthan gum (xc-polymer) , carboxy methyl cellulose ( high and low viscosity ) ,polyacrylamide, polyvinyl alcohol, starch and sodium chloride (NaCl), while the opposite is true for quebracho, chrome lignosulfonate.

scholarly journals Release Kinetics Study of Azithromycin from Bi-layered Tablets

2017 ◽  
Vol 20 (1) ◽  
pp. 54-63
Author(s):  
FM Shah Noman Ul Bari ◽  
Muhammad Rashedul Islam ◽  
Md Mizanur Rahman Moghal ◽  
Israt Jahan Ira
Keyword(s):  
Release Kinetics ◽  
In Vitro Release ◽  
Methyl Cellulose ◽  
Pharmaceutical Journal ◽  
High Viscosity ◽  
Release Mechanism ◽  
Low Viscosity ◽  
Release Studies ◽  
Vitro Release

The objective of this study was to analysis in vitro release kinetics of Azithromycin from bi-layer tablets prepared by direct compression using high viscosity to low viscosity grades of hydroxypropyl methyl cellulose (HPMC K15M, HPMC K4M, HPMC 50 cps), Carbopol 934p and Carbopol 974p. In addition, it also includes evaluating the effect of formulation variables like polymer proportion and polymer viscosity on the release of Azithromycin. In vitro release studies were performed using USP Type-II (Rotating paddle method) at 100 rpm. The dissolution medium consisted of 0.1N HCl (900 ml) for the first 2 hr and the phosphate buffer (pH 6.0) from 3rd to 10th hour. From twenty five different formulations (F-1 to F-25) based on polymer variation, model-dependent and independent methods were used for data analysis and the best results were observed for HPMC 50cps in Korsmeyer- Peppas (R2=0.995 on F-23) kinetic model. The release mechanism of all formulations was Fickian.Bangladesh Pharmaceutical Journal 20(1): 54-63, 2017

scholarly journals 3D Printing of a Reactive Hydrogel Bio-Ink Using a Static Mixing Tool

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1986 ◽  
Author(s):  
María Puertas-Bartolomé ◽  
Małgorzata K. Włodarczyk-Biegun ◽  
Aránzazu del Campo ◽  
Blanca Vázquez-Lasa ◽  
Julio San Román
Keyword(s):  
3D Printing ◽  
Viscosity Solutions ◽  
Structural Integrity ◽  
Cell Types ◽  
High Viscosity ◽  
Soft Tissue Regeneration ◽  
Low Viscosity ◽  
Good Shape ◽  
Wide Range

Hydrogel-based bio-inks have recently attracted more attention for 3D printing applications in tissue engineering due to their remarkable intrinsic properties, such as a cell supporting environment. However, their usually weak mechanical properties lead to poor printability and low stability of the obtained structures. To obtain good shape fidelity, current approaches based on extrusion printing use high viscosity solutions, which can compromise cell viability. This paper presents a novel bio-printing methodology based on a dual-syringe system with a static mixing tool that allows in situ crosslinking of a two-component hydrogel-based ink in the presence of living cells. The reactive hydrogel system consists of carboxymethyl chitosan (CMCh) and partially oxidized hyaluronic acid (HAox) that undergo fast self-covalent crosslinking via Schiff base formation. This new approach allows us to use low viscosity solutions since in situ gelation provides the appropriate structural integrity to maintain the printed shape. The proposed bio-ink formulation was optimized to match crosslinking kinetics with the printing process and multi-layered 3D bio-printed scaffolds were successfully obtained. Printed scaffolds showed moderate swelling, good biocompatibility with embedded cells, and were mechanically stable after 14 days of the cell culture. We envision that this straightforward, powerful, and generalizable printing approach can be used for a wide range of materials, growth factors, or cell types, to be employed for soft tissue regeneration.

scholarly journals Effect of addition of different hydrocolloids on pasting, thermal, and rheological properties of cassava starch

2012 ◽  
Vol 32 (3) ◽  
pp. 579-587 ◽  
Author(s):  
Tatiana Dias Leite ◽  
Joel Fernando Nicoleti ◽  
Ana Lúcia Barretto Penna ◽  
Célia Maria Landi Franco
Keyword(s):  
Rheological Properties ◽  
Carboxymethyl Cellulose ◽  
Food Systems ◽  
Xanthan Gum ◽  
Starch Granule ◽  
Cassava Starch ◽  
Sodium Carboxymethyl Cellulose ◽  
Starch Granules ◽  
Starch Properties ◽  
Starch Gels

Starches and gums are hydrocolloids frequently used in food systems to provide proper texture, moisture, and water mobility. Starch-gum interaction in food systems can change the starch granule swelling and its gelatinization and rheological properties. In this study, the effect of the addition of xanthan gum (XG), sodium carboxymethyl cellulose (SCMC), and carrageenan (CAR) at the concentrations of the 0.15, 0.25, 0.35 and 0.45% (w/v) on the pasting, thermal, and rheological properties of cassava starch was studied. The swelling power (SP) and the scanning electron microscopy (SEM) of the starch gels were also evaluated. The results obtained showed that xanthan gum (XG) had a strong interaction with the cassava starch penetrating between starch granules causing increase in pasting viscosities, SP, storage and loss (G', and G", respectively) modulus and reduction in the setback of the starch; sodium carboxymethyl cellulose (SCMC) greatly increased the pasting viscosities, the SP, and the storage and loss (G', and G", respectively) modulus of the starch-mixtures, mainly due to its greater capacity to hold water and not due to the interaction with cassava starch. Carrageenan (CAR) did not change any of the starch properties since there was no interaction between this gum and cassava starch at the concentrations used.

scholarly journals Formulation of a fast-dissolving oral film using gelatin and sodium carboxymethyl cellulose

2020 ◽  
Vol 24 (3) ◽  
pp. 338-346
Author(s):  
Jwan Ahmed ◽  
Dina Boya ◽  
Hunar Kamal
Keyword(s):  
Carboxymethyl Cellulose ◽  
Dosage Form ◽  
Methyl Cellulose ◽  
Petri Dish ◽  
Sodium Carboxymethyl Cellulose ◽  
Solvent Casting ◽  
Casting Method ◽  
Disintegration Time ◽  
Cellulose Solvent ◽  
Transparent Films

Background and objective: Orally disintegrating film is a solid dosage form made as an alternative for tablets for pediatric and geriatric patients who have difficulty in swallowing. These formulations are designed to dissolve in the mouth rapidly upon contact with saliva. This study aimed to prepare a thin oro-dispersible film base that can withstand handling in which a drug can be incorporated to provide a new dosage form. Methods: The solvent casting method was used to prepare the films, in which the ingredients were mixed, dissolved, and cast in a Petri dish. Then, they were left to dry in the oven overnight. Different concentrations of each of the two polymers alone and combined in different ratios were compared using different concentrations of plasticizer. Results: Successful, transparent films were prepared from gelatin and glycerin. A combination of 70% gelatin and 30% sodium carboxymethyl cellulose with glycerin formed an acceptable film having white color. The film forming capacity of sodium carboxymethyl cellulose alone was not good. All films were tearing and not well formed. All films that contain polyethylene glycol were brittle. Both superdisintegrants reduced the disintegration time for both films, but kyron was more effective than sodium starch glycolate. Conclusion: A successful oral film was prepared using different types of polymers, which is suitable for incorporating a potent drug to form a new dosage form that is easily portable and does not require water for swallowing. Keywords: Fast dissolving oral film; Gelatin; Sodium carboxy methyl cellulose; Solvent casting method.

Solubility and Diffusivity of CO2in Natural Methyl Cellulose and Sodium Carboxymethyl Cellulose

2011 ◽  
Vol 56 (11) ◽  
pp. 4040-4044 ◽  
Author(s):  
Tina Perko ◽  
Elena Markočič ◽  
Željko Knez ◽  
Mojca Škerget
Keyword(s):  
Carboxymethyl Cellulose ◽  
Methyl Cellulose ◽  
Sodium Carboxymethyl Cellulose

Reduction of oil uptake in deep fried tortilla chips Reducción de la absorción de aceite en la fritura de tiras de maíz

2000 ◽  
Vol 6 (5) ◽  
pp. 425-431 ◽  
Author(s):  
O. Esturk ◽  
A. Kayacier ◽  
R.K. Singh
Keyword(s):  
Moisture Content ◽  
Carboxymethyl Cellulose ◽  
Oil Content ◽  
Initial Moisture Content ◽  
High Viscosity ◽  
Oil Uptake ◽  
Frying Time ◽  
Low Viscosity ◽  
Tortilla Chips ◽  
Corn Masa

The reduction of oil uptake in fried tortilla chips was attempted with baking and carboxymethyl cellulose (CMC) addition. The effects of CMC type and concentration, frying time, and prefrying treatment on oil uptake and moisture content were studied. Chips were prepared using corn masa flour. Results showed that the addition of CMC reduced the oil uptake significantly for all samples. The reduction in oil uptake ranged from 5-40% according to the CMC type and concentration. The most effective CMC type was high viscosity, which caused a 40% reduction in oil content for 30 s frying time of baked samples. The addition of CMC also reduced the initial moisture content of raw chips. The highest moisture content reduction was for samples prepared with low-viscosity CMC. Frying time was an important factor on oil uptake and moisture content. When frying time increased, oil content increased while moisture content decreased.

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