scholarly journals Effect Of The Type Of Precipitation On The Process Toobtain Sodium Alginate: Calcium Alginate Method And Alginic Acid Method

1997 ◽  
Vol 23 (2) ◽  
pp. 195-207 ◽  
Author(s):  
D.L. Arvizu-Higuera
Keyword(s):  
Sodium Alginate ◽  
Calcium Alginate ◽  
Alginic Acid ◽  
Acid Method

scholarly journals Effect of Extraction Methods on Characteristic of SodiumAlginate from Brown Seaweed Sargassum fluitans

2018 ◽  
Vol 20 (3) ◽  
pp. 478 ◽  
Author(s):  
Annisa Ajeng Maharani ◽  
Amir Husni ◽  
Nurfitri Ekantari
Keyword(s):  
Sodium Alginate ◽  
Alginic Acid ◽  
Group Analysis ◽  
Brown Seaweed ◽  
Extraction Methods ◽  
Quality Parameters ◽  
Ash Content ◽  
Primary Metabolite ◽  
Acid Method ◽  
Alginate Extraction

Alginate is a primary metabolite that is needed in food and non food industries. Alginate extraction<br />method of seaweed affect on viscosity and yield of the alginate. This study aimed to determine the effect of<br />extraction methods on characteristic and quality of sodium alginate Sargassum fluitans and the extraction<br />cost needed. This study used two different extraction methods which wereacid alginate method and calcium<br />alginate method. Quality parameters observed include yield, moisture content, ash content, viscosity,<br />pH, whiteness index, and functional group analysis, also extraction cost analysis. The results showed that<br />alginate extraction of S. fluitans by alginic acid method produced better sodium alginate quality than using<br />calcium alginate method, but the cost higher. Sodium alginate produced by alginic acid method had high<br />viscosity (127.17±11.50 cps) with yield 9.95±0.31%. The moisture and ash content of the product was low or<br />9.35±0.31% and 21.88±0.41%, respectively.<br /><br />

scholarly journals Comparison of porous carbons derived from sodium alginate and calcium alginate and their electrochemical properties

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 2209-2215
Author(s):  
Ming Li ◽  
Kuihua Han ◽  
Zhaocai Teng ◽  
Jinxiao Li ◽  
Meimei Wang ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Sodium Alginate ◽  
Calcium Alginate ◽  
Alginic Acid ◽  
Porous Carbons

Comparisons of the microstructures and electrochemical properties of porous carbons derived from the carbon-forming component alginic acid under the action of Na/Ca.

scholarly journals Formulation and Mathematical Optimization of Controlled Release Calcium Alginate Micro Pellets of Frusemide

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Amitava Ghosh ◽  
Prithviraj Chakraborty
Keyword(s):  
Sodium Alginate ◽  
Calcium Alginate ◽  
Mathematical Optimization ◽  
Extended Period ◽  
Cost Effective ◽  
Polynomial Equation ◽  
Chronic Hypertension ◽  
Order Polynomial ◽  
High Degree

Objective. Frusemide loaded calcium alginate micropellets, an oral microparticulate delivery system, was statistically optimized exhibiting prolonged therapeutic action minimizing its adverse effects.Methods. Ionotropic Gelation technique was adopted employing 32Factorial designs and keeping the entire process free from organic solvents. Physicochemical and the release characteristics of the prepared formulations were studied, keeping variations only in sodium alginate (primary polymer) and Acrycoat E30D (copolymer) dispersion.Result. Sodium alginate was predominant over Acrycoat E30D in all batches. Nonadditives or interaction was observed to be insignificant. Multiple regressions produced second-order polynomial equation, and the predictive results obtained were validated with high degree of correlation. Thein vivostudy applauded that optimized calcium alginate micropellets of frusemide can produce a much greater diuretic effect over an extended period of 24 hours.Conclusion. This study reveals that the potential of a single dose of the mathematically optimized micro pellets of frusemide formulation is sufficient in the management of peripheral edema and ascites in congestive heart failure and as well in the treatment of chronic hypertension, leading to better patient compliance, and can be produced with minimum experimentation and time, proving far more cost-effective formulation than the conventional methods of formulating dosage forms.

scholarly journals RECIRCULACIÓN DE LÍQUIDOS RESIDUALES EN LA CONVERSIÓN DE ALGINATO DE CALCIO EN ÁCIDO ALGÍNICO DURANTE EL PROCESO DE PRODUCCIÓN DE ALGINATOS

2005 ◽  
Vol 20 (1-2) ◽  
pp. 1
Author(s):  
Y. E. Rodríguez-Montesinos ◽  
G. Hernández-Carmona ◽  
D. L. Arvizu-Higuera
Keyword(s):  
Calcium Alginate ◽  
Alginic Acid ◽  
Current System ◽  
Macrocystis Pyrifera ◽  
Alginate Production ◽  
Yield And Quality ◽  
Alginate Fibers ◽  
Counter Current ◽  
Very High

Se estudió el efecto de recircular la solución ácida residual en la etapa de conversión de alginato de calcio en ácido algínico, utilizando el alga Macrocystis pyrifera . Los líquidos residuales fueron reciclados en un sistema en contra corriente, con lo cual se logró procesar tres cargas de alginato de sodio con el mismo volumen de agua, permitiendo una conversión efectiva en ácido algínico, con una reducción del 56% en el consumo de agua dulce. Se experimentó un sistema de recirculación en línea (sin reemplazo de agua), este sistema no es recomendable, debido a que la acumulación de calcio en el alginato después de la segunda recirculación, produce una viscosidad aparente muy alta, con un porcentaje de reducció superior al 50%. Se determinó el efecto del número de lavados ácidos del ácido algínico sobre la calidad y rendimiento del alginato obtenido. El tratamiento ácido se llevó a cabo con tres, dos y un lavado. Se concluye que se requieren tres lavados de las fibras de alginato de calcio para lograr una conversión efectiva en ácido algínico, pero el primero y segundo lavado se pueden hacer con ácido reciclado. Es tesis tema representa un ahorro del 66% en el consumo de agua en esta etapa. Recycling of residual liquids from the conversion of calcium alginate to alginic acid during alginate production process The effect of recycling the residual acid solution from the conversion of calcium alginate to alginic acid from the alga Macrocystis pyrifera was studied. The residual liquid was recycled using a counter current system; it was possible to treat three batches of calcium alginate with the same amount of water, with an effective conversion into alginic acid, saving 56% of fresh water. An inline recycling system was experimented (without water replacement). This system is not recommended, because the large increase of calcium in the alginate after the second recycling, produces a very high apparent viscosity. Using this system the viscosity was reduced in more than 50%. We experimented the effect of the number of acid washings of the alginic acid, on the yield and quality of the final alginate. The acid treatment was carried out with three, two and one washing. It was concluded that three acid washings of the calcium alginate fibers are necessary to obtain an effective conversion of calcium alginate to alginic acid, but the first and second washings can be carried out with recycled acid. This system represents a water saving up to 66% in this step.

scholarly journals The effects of calcium alginate and alginic acid additives on the control of diclofenac release from alginate gel beads.

1995 ◽  
Vol 10 (2) ◽  
pp. 105-110
Author(s):  
Yoshifumi Murata ◽  
Tadashi Maeda ◽  
Etsuko Miyamoto ◽  
Susumu Kawashima
Keyword(s):  
Calcium Alginate ◽  
Alginic Acid ◽  
Alginate Gel ◽  
Gel Beads

Synthesis of spherical porous cross-linked glutaraldehyde/poly(vinyl alcohol) hydrogels

2016 ◽  
Vol 36 (9) ◽  
pp. 891-898
Author(s):  
Sadao Araki ◽  
Yuko Shirakura ◽  
Harufumi Suzuki ◽  
Hideki Yamamoto
Keyword(s):  
Sodium Alginate ◽  
Vinyl Alcohol ◽  
Calcium Alginate ◽  
Chloride Solution ◽  
Calcium Chloride Solution ◽  
Inorganic Salts ◽  
Poly Vinyl Alcohol ◽  
Cross Linking ◽  
Alginate Content ◽  
Calcium Alginate Gels

Abstract Spherical glutaraldehyde cross-linked poly(vinyl alcohol) (PVA) hydrogels (G-PVA) were prepared in three steps: gelatification, cross-linking, and removal of alginate. Gelatification was carried out by dropping a solution of alginate, PVA, and glutaraldehyde into a calcium chloride solution to form calcium alginate. Calcium alginate gels were prepared at 20°C, 40°C, 60°C, and 80°C to study the effect of gelatification temperature on the formation of pores on the surface of G-PVA. The effect of the alginate content was studied. PVA and glutaraldehyde were cross-linked by immersion of the gels in a solution of H2SO4 and Na2SO4. The effect of sodium alginate and inorganic salts, such as MgSO4 and K2SO4, on the formation of pores on the surface of G-PVA was confirmed.

scholarly journals Characterization of sodium alginate/d-limonene emulsions and respective calcium alginate/d-limonene beads produced by electrostatic extrusion

2015 ◽  
Vol 45 ◽  
pp. 111-123 ◽  
Author(s):  
Steva Lević ◽  
Ivana Pajić Lijaković ◽  
Verica Đorđević ◽  
Vladislav Rac ◽  
Vesna Rakić ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Calcium Alginate

scholarly journals The Effect Of Sodium Alginate Concentration On The Rheological Parameters Of Spinning Solutions

2015 ◽  
Vol 15 (2) ◽  
pp. 123-126
Author(s):  
Magdalena Brzezińska ◽  
Grzegorz Szparaga
Keyword(s):  
Rheological Properties ◽  
Sodium Alginate ◽  
Calcium Alginate ◽  
Solution Method ◽  
Polymer Solutions ◽  
Rheological Parameters ◽  
Wet Spinning ◽  
Alginate Concentration ◽  
Preliminary Research ◽  
Alginate Fibres

Abstract The aim of the study was to determine the rheological properties of solutions of two types of sodium alginate in water. Rheological studies were carried out to determine the rheological properties of the spinning solutions. Polymer solutions of different concentrations were obtained. Based on the preliminary research of the concentrations of solutions, the proper n and k parameters were selected in order to obtain fibre by wet spinning from solution method. For selected concentrations of polymer solutions, the calcium alginate fibres were obtained.

The effects of the addition to soil of alginic acid and of other forms of organic matter on soil aeration

1947 ◽  
Vol 37 (3) ◽  
pp. 257-266 ◽  
Author(s):  
J. H. Quastel ◽  
D. M. Webley
Keyword(s):  
Sodium Alginate ◽  
Alginic Acid ◽  
Methyl Cellulose ◽  
Preceding Paper ◽  
High Water ◽  
Soil Aeration ◽  
Holding Power ◽  
Acetate Methyl ◽  
Standard Soil ◽  
Water Holding

1. A manometric technique for the assessment of soil aeration, described in a preceding paper by Webley (1947), has been used for comparing the effects of the incorporation into soil of alginic acid (as the ion) and other organic materials on soil airwater relationships. Some of the shortcomings of the technique, as well as its advantages are described.2. The addition of sodium alginate to a soil improves its crumb stability and its water-holding power. It is shown that the addition of 0-1 g. sodium alginate to 100 g. of the air-dried standard soil used in this work has a gross effect equivalent to an increase in the water-holding power of soil of 11%. The effect of the alginate rapidly increases to a maximum with increase of the concentration of the alginate. The incorporation of the relatively insoluble calcium alginate has but little effect on the soil airwater relationship. It is suggested that alginate confers hydrophilic properties on soil by its combination as an ion with one or more constituents of the soil particle, thereby presenting new surfaces with high water-holding powers.3. Incorporation into soil of cellulose acetate, methyl cellulose or of carboxymethyl cellulose improves its water-air relationships.

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