Effects of Sodium Alginate and Gelatin on Physical and Thermal Properties of Pullulan Blend Films

This study was conducted to examine the effect of dietary sodium alginate and fish oil on bodily accumulated trichloroethylene (TCE), which has been widely used as a halogenated solvent and is metabolized at a high rate. Each of three groups of rats was fed on either of diets containing cellulose-soybean oil (control), Na-alginate-soybean oil or cellulose-fish oil for 3 wk, and thereafter given a single oral dose of TCE (100 mg (0.76 mmol)/rat). TCE levels in the blood were monitored for 10 h after the administration of TCE. The peak concentrations of TCE in the blood tended to be higher in the alginate and fish oil groups as compared with those in the cellulose-soybean oil group, but not to a significant extent. TCE concentrations in the liver, kidney, brain and the three fat tissues (epididymal, perirenal and subcutaneous) were significantly lower in the alginate and fish oil groups than in the cellulose-soybean oil group. Fat tissue weights were also lower in the alginate group and fish oil group. The hepatic drug metabolizing enzymes could not account for the remarkable decreases of residual TCE contents in the alginate and fish oil groups. These findings indicate that the metabolism and excretion of TCE might be accelerated in animals with reduced fat tissue mass.

Effect of sodium alginate on the yogurt stability was dependent on the thickening effect and interaction between casein micelles and sodium alginate

Effect of sodium alginate on phosphorus recovery by vivianite precipitation

In this paper, the effect of sodium alginate (SA) on the flotation separation of molybdenite (MoS2) from chalcopyrite using kerosene as collector was systematically investigated. The results of single-mineral micro-flotation tests indicated that SA exhibited strong depression on chalcopyrite flotation while it imposed no impact on the floatability of molybdenite. However, in the chalcopyrite–molybdenite mixed-mineral flotation system, the presence of chalcopyrite significantly increased the depressing effect of SA on molybdenite flotation, leading to a considerable reduction in the flotation selectivity. The negative impact of chalcopyrite on the performance of SA in molybdenite flotation was eliminated by adding a certain dosage of kerosene prior to SA. A concentrate containing 53.43% of molybdenum (Mo) was obtained at 76.90% of recovery using 19 mg/L kerosene and 40 mg/L SA at pH 5.4. Zeta potential measurements indicated that the adsorption of SA on chalcopyrite surfaces was stronger than that on molybdenite surfaces, which agreed with the single-mineral flotation test results. The adsorption of SA on chalcopyrite was further confirmed to be chemisorption by Fourier-transform infrared spectroscopy (FTIR) spectra analyses. When Cu2+ appeared in solution, the flotation of molybdenite was strongly depressed by SA. Mechanism analyses indicated that more active sites were generated on molybdenite surfaces after the addition of Cu2+, thus promoting the adsorption of SA.

Effects of sodium alginate and rice variety on the physicochemical characteristics and 3D printing feasibility of rice paste

The effect of sodium alginate on struvite crystallization in aqueous solution: A kinetics study

Given the gradual increase in the chlorite content of hematite ores, pulp properties seriously deteriorate during flotation. The traditional anion reverse flotation of hematite cannot effectively eliminate the effects of chlorite, leading to a significant decrease in the total Fe (TFe) grade of the concentrate. In this work, the effect of sodium alginate on the reverse flotation of hematite was systematically investigated. Flotation tests of artificially mixed ores were conducted, and the results showed that sodium alginate can significantly improve the removal rates of quartz and chlorite. The adsorption measurements, infrared spectroscopy, and contact angle tests demonstrated that sodium alginate adsorbs on the quartz surface by chelating with calcium ions, thereby weakening the steric hindrance of oleate ions and increasing the adsorption capacity of sodium oleate to ultimately improve the removal rate of quartz. Furthermore, owing to its lower density and fine particle size, chlorite is easily entrained into the foam layer. Sodium alginate dramatically increases the liquid-to-gas ratio of the foam layer by increasing pulp viscosity, thereby increasing the entrainment rate of chlorite and finally improving its removal rate. The core content of this thesis bears significance in improving the Fe grade in the reverse flotation of chlorite-containing hematite.

The effect of sodium alginate on the flotation separation of scheelite from calcite and fluorite

Effects of sodium alginate on properties of WPI-NaCas composite films optimized by previous uniform design experiments were investigated. Films were prepared with different concentrations (1%, 2%, 3%) and ratios (1:0, 5:1, 3:1, 1:1, 1:3, 1:5, 0:1, ratio of composite protein solution to sodium alginate solution) of sodium alginate additions. Results suggested increases in water solubility of films and middle diameter, volume-length mean diameter and area-length mean diameter of film-forming solutions. Addition of sodium alginate decreased the gas and water vapor barrier properties of composite films, however, their mechanical properties could be improved by proper usage. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope analysis indicated that protein and sodium alginate presented well interaction and compatibility.

The effects of sodium alginate on the adhesion and aggregation of rat and human platelets were examined to investigate the role of this material in haemostasis. The adhesion of the rat and human platelets on the surface of glass beads, as well as the platelet aggregation in vitro, were enhanced in the presence of sodium alginate. This effect was dependent of the molecular weight and concentration of sodium alginate in the medium. The scanning and transmission electron microscopic observations revealed that the aggregated platelets, in the presence of sodium alginate, lost their discoid shape and formed irregular spheres with extended pseudopods. The number of microfibrils in the cytoplasm of these platelets markedly increased. These findings demonstrated that the aggregation of platelets was apparently enhanced in the presence of sodium alginate. Sodium alginate did not inhibit the aggregation of platelets induced by adenosine diphosphate or collagen, but instead, accelerated the action of these agents. Sodium alginate had no direct effects upon the release of serotonin from platelets and arachidonic acid cascade. The results of the present study suggest that the enhancing effect of sodium alginate on the adhesion and aggregation of platelets may have a significant role in haemostasis.

Effect of sodium alginate and different types of oil on the physical properties of ultrasound-assisted nanoemulsions

To combat climate change, one approach is to manufacture products from biomass-fungi composite materials instead of petroleum-based plastics. These products can be used in packaging, furniture, and construction industries. A 3D printing-based manufacturing method was developed for these biomass-fungi composite materials, eliminating the need for molds, and enabling customized product design. However, previous studies on the 3D printing-based method showed significant shrinkage of printed samples. In this paper, an approach is proposed to reduce the shrinkage by incorporating ionic crosslinking into biomass-fungi composite materials. This paper reports two sets of experiments regarding the effects of sodium alginate (SA) and calcium chloride (CaCl2) on fungal growth and fungal viability. The first set of experiments was conducted using Petri dishes with fungi isolated from colonized biomass-fungi material and different concentrations of SA and CaCl2. Fungal growth was measured by the circumference of fungal colonies. The results showed that concentrations of SA and CaCl2 had significant effects on fungal growth and no fungal growth was observed on Petri dishes with 15% CaCl2. Some of these Petri dishes were also observed under confocal microscopy. The results confirmed the differences obtained by measuring the circumference of fungal colonies. The second set of experiments was conducted using Petri dishes with biomass-fungi mixtures that were treated with different concentrations of SA and exposure times in a CaCl2 (crosslinking) solution. Fungal viability was measured by counting colony-forming units. The results showed that the addition of the SA solution and exposure times in the crosslinking solution had statistically significant effects on fungal viability. The 2SA solution was prepared by dissolving 2 g of SA in 100 mL of water, the 5SA solution was prepared by dissolving 5 g of SA in 100 mL of water, and the crosslinking solution was prepared by dissolving 5 g of CaCl2 in 100 mL of water. The results also showed that fungal viability was not too low in biomass-fungi mixtures that included 2SA solution and were exposed to the crosslinking solution for 1 min.

Meat products, such as fish meat, are known to be susceptible to undesirable chemical and microbial reactions that characterize spoilage. In this study, the effect of a sodium alginate and chitosan coating incorporated with Mentha piperita, Artemisia dracunculus, and Zataria multiflora essential oils on chemical and microbial attributes of rainbow trout meat was evaluated during storage at 4°C. Chemical and microbial assays were performed on rainbow trout fillets with alginate and chitosan coatings and 0.2% concentration of test essential oils. The results showed that the alginate coating with essential oils significantly decreased production of thiobarbituric acid (TBA) and total volatile basic nitrogen (TVBN) and reduced the growth of foodborne spoilage bacteria during storage at 4ºC. At day 12, the best results were obtained in chitosan coating + Z. multiflora, with 5.96 ± 0.12, 4.93 ± 0.12, and 3.83 ± 0.2 for total viable counts, psychrotrophic bacterial count, and lactic acid bacteria count, respectively. Moreover, the lowest amounts of chemical analysis were observed in chitosan coating + Z. multiflora at the final day (0.54 ± 0.03 and 20.31 ± 0.1 for TBA and TVBN, respectively). Our study revealed that essential oils can be used as effective natural components against undesirable chemical and microbial reactions in fish meat.

The effect of sodium alginate in supersaturated solutions of calcium carbonate was investigated under plethostatic conditions. The rates of crystal growth measured in the presence of sodium alginate at concentrations as low as 0.83 x 10(-7) mol dm(-3) were drastically reduced. Kinetic analysis according to a Langmuir-type adsorption isotherm led to the calculation of an affinity constant Kaff = 999.8 x 10(-4) mol dm(-3). The apparent order found from kinetic data was 3.0+/-0.2 suggesting a surface nucleation mechanism.

The effects of sodium alginate on Staphyiococcus aureus 196 exposed to mild heating or to freezing at -21 C were studied. The addition of sodium alginate to a diluent appeared to confer some protection of viable cells during mild heating. The effect of the presence of sodium alginate in the suspending media during freezing was less clear. There was a slight trend, not statistically significant, for greater reduction in numbers of viable cells at the low temperature when 4% alginate was present in phosphate buffer. Results indicated that the value of sodium alginate in controlling this food-poisoning microorganism in frozen food is questionable.