Use of antioxidants substances to protect the hydrocolloids carrageenan , agaran and alginates used in food industry when exposed to radiation. Carrageenan , agaran e alginates are hydrocolloids largely employed in every kind of food products as stabilizing agent and viscosity builder. The human body does not absorb them, so they do not introduce extra calories in the diet. Irradiation is presented as an important alternative method in food preservation because do not induce temperature increase being of good efficiency in cold food ingredients decontamination.
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Use of antioxidants substances to protect the hydrocolloids carrageenan , agaran and alginates used in food industry when exposed to radiation. Carrageenan , agaran e alginates are hydrocolloids largely employed in every kind of food products as stabilizing agent and viscosity builder.
The human body does not absorb them, so they do not introduce extra calories in the diet. Irradiation is presented as an important alternative method in food preservation because do not induce temperature increase being of good efficiency in cold food ingredients decontamination. In this work aqueous solutions of carrageenan , agar e sodium alginate were gamma irradiated kGy in presence of ascorbic acid, roselle Hibiscus sabdariffa L. Edible polysaccharide solutions showed to be suitable systems for the evaluation of ionizing radiation effects as they presented a singular radiosensitivity through viscosity changes.
The results obtained showed that in general the antioxidants employed had a radioprotective action that can be of importance in the future commercial applications of food irradiation. Use of antioxidants substances to protect the hydrocolloids carrageenan , agaran and alginates used in food industry when exposed to radiation; Uso de substancias antioxidantes na resposta a radiacao dos hidrocoloides carragenanas, agaranas e alginatos utilizados na industria alimenticia.
Gamma radiation effects on the viscosity of carrageenan , agarans and alginates to be used as food additives. Carrageenan , agarans and alginates are phycocolloids, which change the consistence of the foodstuff and prevent undesirable changes such as moisture migration or textural profile changes.
These phycocolloids are additives used in large scale for all kind of food products. They are not absorbed for the human organism and do not introduce extra calories in the diet. The process of irradiation, is an alternative method of great potential, because do not increase the temperature and it is highly in the decontamination of food ingredients.
In this work, agar alginates and carrageenan were irradiated as powder with different doses kGy of Co and the rheological functional performance of water solutions of the irradiated additives was studied. The results are analyzed taking in account the future applications of those additives in irradiated foods.
The viscosity of these hydrocolloids shows a decrease when submitted to an irradiation with doses until 10 kGy.
Gamma radiation effects on the viscosity of carrageenan , agarans and alginates to be used as food additives; Efeito da radiacao gama na viscosidade de carragenanas, agaranas e alginatos utilizados na industria alimenticia.
A novel high-performance anion-exchange chromatographic method for the analysis of carrageenans and agars containing 3,6-anhydrogalactose. Analytical Biochemistry, , Table 3 Overview of seaweed type hydrocolloid source Rheological properties of agar and carrageenan from Ghanaian red seaweeds. This work shows that certain red seaweed species in Ghana contain hydrocolloids with desirable properties for high value applications Fourier transform infrared Agar, alginate, and carrageenans are high-value seaweed hydrocolloids , which are used as gelation and thickening agents in different food, pharmaceutical, and biotechnological applications.
The annual global production of these hydrocolloids has recently reached , tons with a gross market Hydrocolloid -based nutraceutical delivery systems.
Nutraceuticals are important due to their inherent health benefits. However, utilization and consumption are limited by their poor water solubility and instability at normal processing and storage conditions. Herein, we propose an elegant and novel approach for the delivery of nutraceuticals in their active form using hydrocolloid matrices that are inexpensive and non-toxic with generally recognized as safe GRAS status. Iota- carrageenan and curcumin have been chosen as models of hydrocolloid and nutraceutical compounds, respectively.
The iota- carrageenan network maintains a stable organization after encapsulating curcumin molecules, protects them from melting and then releases them in a sustained manner. These findings lay a strong foundation for developing value-added functional and medicinal foods. Improving adhesion of seasonings to crackers with hydrocolloid solutions.
Food powders were applied on crackers that had been coated using water, oil, emulsion, sucrose, or hydrocolloid solutions. The hydrocolloids that were used include gellan gum, kappa- carrageenan , methylcellulose, gum karaya, gum tragacanth, gum arabic, guar gum, modified starch, and maltodextrin. Solutions of similar hydrophobicity to the powder gave the greatest adhesion. Hydrocolloid structural differences, including the presence or absence of branching, substitution of sugar units, and molecular weight affect water binding and thickening of the hydrocolloid spray that seemed to be significant factors affecting adhesion of powders to the target surface.
For cheese powder, hydrocolloids were capable of replacing the oil within an emulsion while improving or maintaining the same level of adhesion, with gum arabic providing the greatest adhesion. For cocoa powder, hydrocolloid solutions were ineffective adhesives due to differences in hydrophilicity that result in insolubility. The effect of hydrocolloid concentration on adhesion was dependent both on the hydrocolloid type and the concentration that is sprayable, with 0.
Adhesion using sucrose solutions was determined by particle size and relative hydrophobicity. Increasing sucrose concentration decreased adhesion of smaller particles, but increased adhesion of larger particles. Adhesion of NaCl significantly increased with decreasing NaCl size using oil, water, and sucrose solutions.
Functional hydrocolloids from seaweeds. The global production of seaweeds continues to grow for production of food hydrocolloids , i. Because of their unique gelling properties seaweed hydrocolloids are used in various food and pharmaceutical applications. Effect of hydrocolloids on the physico-chemical and rheological properties of reconstituted sweetened yoghurt powder.
The consistency of sweetened yoghurt misti dahi is a desired characteristic which is attributed to the casein protein network formation during fermentation. Unfortunately, this property is lost in reconstituted sweetened yoghurt RSY due to the irreversible nature of protein denaturation during spray drying. Therefore, this study aimed to increase the consistency of RSY using different hydrocolloids.
RSY containing different hydrocolloids further increased the rheological properties. Addition of hydrocolloids significantly increased the starter bacteria count and pH and reduced water expulsion rate P hydrocolloids can improve the rheological properties of reconstituted yoghurt. A review of extractions of seaweed hydrocolloids : Properties and applications. Directory of Open Access Journals Sweden. Full Text Available The term hydrocolloid generally refers to substances that form gels or provide viscous dispersion in the presence of water.
Alginate, agar, and carrageenan are three commercially valuable hydrocolloids derived from certain brown and red seaweed and each has their distinct physicochemical properties i. Various applications of these seaweed hydrocolloids as thickeners, stabilizers, coagulants and salves in the wound and burn dressings and materials to produce bio-medical impressions in the food, pharmaceutical, and biotechnology industries are highlighted in this review.
Although the existing industrial methods of extraction for these seaweed hydrocolloids are well-established, still growing demand has exposed certain limitations of those methods, notably efficiency and product consistency. In order to achieve targeted hydrocolloids for specific purposes and functionalities, some novel and green extraction methods have also been proposed and discussed. Microwave-assisted extraction MAE, ultrasound-assisted extraction UAE, enzyme-assisted extraction EAE, supercritical fluid extraction SFE, pressurized solvent extractions PSE, reactive extrusion and photobleaching process are selectively presented as highly promising candidates that can avoid the use of chemicals and provide novel means of access to seaweed hydrocolloids with both economic and environmental benefits.
Application of iota and kappa carrageenans to traditional several food using modified cassava flour. Al-Baarri, A. Carrageenan has been known well as hydrocolloids that forming viscous dispersions and gels when dispersed in water.
The carrageenan has not been widely applied to traditional foods. Therefore, the aim of this research was to determine the effect of kappa and iota carrageenans in traditional food models using modified cassava flour, sugar, and coconut milk. The textural properties, i. On the other hand, the reserve result were found in the adhesiveness parameter. As conclusion, kappa carrageenan scan be potentially used for producing traditional foods based on the hard-texture-oriented foods whereas iota carrageenan can be used for the traditional foods with better adhesiveness.
Seaweed hydrocolloid production: an update on enzyme assisted extraction and modification technologies. The techno-functional properties of the seaweed polysaccharides depend strictly on their unique structural make-up, notably degree and position of sulfation and presence of anhydro-bridges.
Classical extraction techniques include hot alkali treatments, but recent research has shown promising results with enzymes. Current methods mainly involve use of commercially available enzyme mixtures developed for terrestrial plant material processing. Application of seaweed polysaccharide targeted enzymes allows for selective extraction at mild conditions as well as tailor-made modifications of the hydrocolloids to obtain specific functionalities.
Full Text Available Agar, alginate, and carrageenans are high-value seaweed hydrocolloids , which are used as gelation and thickening agents in different food, pharmaceutical, and biotechnological applications. Polysaccharides hydrocolloid carrageenan , agar and alginate containing phenol compounds was oxidized to be converted into quinone and it was expected to act as a cross linking agent. The purpose of this study was to determine the characteristics thickness, tensile strength, elongation, solubility and water vapour transmition rate of edible film made from nile tilapia skin gelatin by adding different type polyssacharide hydrocolloid.
Based on the result it can be seen that the addition of oxidized polisacarides hydrocolloid have a significant effect on tensile strength TS , water vapor transmision rate, solubility and elongation at break properties, but did not in thickness. Edible film gelatin with the addition of alginate has better characteristics viewed by tensile strength Improvement of physical properties of gluten-free steamed cake based on black waxy rice flour using different hydrocolloids.
Hydrocolloids increased the apparent viscosity and the thixotropic behaviour, depending on the type of hydrocolloids. Xanthan had the greatest effects on both moduli, whereas carrageenan had the smallest effects. The overall acceptability of cake with xanthan and guar were higher than control. This study is the first report on using black waxy rice flour as a main raw material in gluten free cake. The results of this study provided useful information for selection hydrocolloids as ingredients that can help to improve the physical properties of waxy rice steamed cake.
Extension shelf life of batte by using hydrocolloids and gamma irradiation. Full Text Available Batte is baked french one of the most baked coated most prevalent in the markets after the cake wrapping. Batte exposed generally two types of corruption which is occurring phenomenon of anti-staling and corruption microbial molds. In this study produced batte with an attempt to prolong the period of its validity by addition 1.
Hydrocolloids at 1. The hydrocolloids increase flexibility, rubber and freshness of batte to 24 days compared to 8 days in control sample.
Thiobarbituric acid T. A values at the end of storage at room temperature ranged to 0. Also, gamma irradiation reduced the total bacterial count of batte product. Sensory evaluation of produced batte was done. The addition of 1. Radiation effects on agar, alginates and carrageenan to be used as food additives.
Agar, alginates and carrageenan are hydrocolloids that induce stabilization of physical properties of the food product during shelf life and prevention of undesirable changes such as moisture migration, gas cell coalescence or textural profile changes.
In this work, agar, alginates and carrageenan was irradiated as powder with different doses kGy of Co and the rheological functional performance of water solutions of these irradiated additives was studied. This study investigated the efficacy of ultra-high pressure homogenization UHPH in the presence or absence of added hydrocolloids for enhancing a range of physic-chemical properties of soymilk-which are important for extending shelf-life.
metodos de extraccion de carragenina
Carrageenan: A natural seaweed polysaccharide and its applications Vipul D. Prajapati , Pankaj M. Maheriya, Girish K. Jani, Himanshu K. Solanki Department of Pharmaceutics, S. As they are derived from the natural source, they are easily available, non-toxic, cheap, biodegradable and biocompatible.