Effect of gamma irradiation on the physicochemical properties of sodium alginate solution and internally crosslinked film made thereof

Ground reinforcement is a method used to reduce the damage caused by earthquakes. Usually, cement-based reinforcement methods are used because they are inexpensive and show excellent performance. Recently, however, reinforcement methods using eco-friendly materials have been proposed due to environmental issues. In this study, the cement reinforcement method and the biopolymer reinforcement method using sodium alginate were compared. The dynamic properties of the reinforced ground, including shear modulus and damping ratio, were measured through a resonant-column test. Also, the viscosity of sodium alginate solution, which is a non-Newtonian fluid, was also explored and found to increase with concentration. The maximum shear modulus and minimum damping ratio increased, and the linear range of the shear modulus curve decreased, when cement and sodium alginate solution were mixed. Addition of biopolymer showed similar reinforcing effect in a lesser amount of additive compared to the cement-reinforced ground, but the effect decreased above a certain viscosity because the biopolymer solution was not homogeneously distributed. This was examined through a shear-failure-mode test.

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Microwave-assisted extraction of sodium alginate from brown macroalgae Nizimuddinia zanardini, optimization and physicochemical properties

Separation Science and Technology ◽

10.1080/01496395.2021.1954020 ◽

2021 ◽

pp. 1-14

Author(s):

Payam Torabi ◽

Nasser Hamdami ◽

Javad Keramat

Keyword(s):

Physicochemical Properties ◽

Sodium Alginate ◽

Microwave Assisted Extraction ◽

Brown Macroalgae ◽

Microwave Assisted ◽

Assisted Extraction

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Changes in Microbiological and Physicochemical Properties of Bee Pollen by Application of Gamma Irradiation and Ozone Treatment

Journal of Food Protection ◽

10.4315/0362-028x-61.2.217 ◽

1998 ◽

Vol 61 (2) ◽

pp. 217-220 ◽

Cited By ~ 11

Author(s):

HONG-SUN YOOK ◽

SEONG-IL LIM ◽

MYUNG-WOO BYUN

Keyword(s):

Fatty Acid Composition ◽

Fatty Acid ◽

Physicochemical Properties ◽

Gamma Irradiation ◽

Acid Composition ◽

Thiobarbituric Acid ◽

Acid Value ◽

Ozone Treatment ◽

Bee Pollen ◽

Thiobarbituric Acid Value

The effects of gamma irradiation and ozone treatment on microbiological and physicochemical properties of bee pollen were investigated. Gamma irradiation at 7.5 kGy reduced the total microbial loads below detection levels (>102 CFU g−1) but after ozone treatment of up to 18 ppm for 8 h the total aerobic bacteria were found in concentrations of more than 103 CFU g−1. Physicochemical properties such as amino acid and fatty acid composition, thiobarbituric acid value, mineral content, and pigment were not significantly changed by gamma irradiation, whereas ozone treatment caused significant changes in fatty acid composition, thiobarbituric acid value, and pigment by lipid oxidation and decoloration (P < 0.05).

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Stability of Anthocyanin from Mulberry Extracts in Alginate Microspheres at High Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.506.587 ◽

2012 ◽

Vol 506 ◽

pp. 587-590 ◽

Cited By ~ 2

Author(s):

R. Yamdech ◽

Pornanong Aramwit ◽

Sorada Kanokpanont

Keyword(s):

High Temperature ◽

Sodium Alginate ◽

Dry Weight ◽

Flow Rates ◽

Alginate Solution ◽

Water Extracts ◽

External Gelation ◽

Mulberry Fruit ◽

Total Anthocyanins ◽

Mulberry Fruits

The aim of this study was to investigate stabilities of anthocyanins from mulberry fruits extracts in alginate microspheres. The total anthocyanins contents measured from water extracts of mulberry fruits (Chiangmai/Jul cultivars) were at 10.46±0.51 mg/g DW and 15.31±0.86 mg/g DW (Chiangmai/Korat cultivars). At high temperature the extracts lost their anthocyanin contents to 52%wt (at 100°C for 5 hour) and 73%wt (at 121°C for 20 min). Alginate microspheres were prepared using external gelation methods. Sodium alginate solution (2.5%w/v) was sprayed into CaCl2solution (0.1M) through a nozzle at N2flow rates of 20 L/min. The average bead sizes were at 342.03±3.21µm. Anthocyanins loading on alginate microspheres were at 2.283±0.15 mg/g dry weight. At 80(10h), 100(5h) and 121°C(20min), Anthocyanins retention were at 91%wt, 82%wt and 89%wt, respectively. Adsorption of anthocyanins from mulberry fruit extracts on alginate microspheres resulted in a greater stability at high temperature than that of the free anthocyanins.

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Physicochemical Properties of Calcium Caseinate Films Cross-Linked by Gamma-Irradiation

Chemical Engineering Communications ◽

10.1080/00986440214058 ◽

2002 ◽

Vol 189 (10) ◽

pp. 1389-1402 ◽

Cited By ~ 3

Author(s):

M. Lacroix ◽

M. Ressouany ◽

B. Ouattara ◽

H. -L. Yu ◽

M. A. Mateescu ◽

...

Keyword(s):

Physicochemical Properties ◽

Gamma Irradiation

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Synergistic effects of citric acid - sodium alginate on physicochemical properties of α-tricalcium phosphate bone cement

Ceramics International ◽

10.1016/j.ceramint.2018.10.124 ◽

2019 ◽

Vol 45 (2) ◽

pp. 2146-2152 ◽

Cited By ~ 6

Author(s):

Haishan Shi ◽

Wenqian Zhang ◽

Xu Liu ◽

Shenghui Zeng ◽

Tao Yu ◽

...

Keyword(s):

Citric Acid ◽

Physicochemical Properties ◽

Bone Cement ◽

Sodium Alginate ◽

Tricalcium Phosphate ◽

Synergistic Effects

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Study on the Calamine/Sodium Alginate Modified Viscose Fiber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.192 ◽

2011 ◽

Vol 418-420 ◽

pp. 192-195

Author(s):

Dong Qi Liu ◽

Ying Liu ◽

Shu Fa Han ◽

Yu Feng Zhang ◽

Cui Yu Yin

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Sodium Alginate ◽

Mechanical Performance ◽

Viscose Fiber ◽

Alginate Solution ◽

Fiber Properties ◽

Injection Methods ◽

The Stability ◽

Scanning Electron

In this article we successfully prepared calamine / sodium alginate viscose fiber. Good dispersion and stability of the modified solution was prepared by dispersing calamine in alkaline solution of sodium alginate, and then mixed it with viscose spinning solution by spinning injection methods. Moreover, the stability of calamine / sodium alginate solution, the effect of concentration of calamine on the fiber properties is studied in this paper. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and physical mechanical performance are test to characterize the structure and the performance of the calamine / sodium alginate viscose fiber.

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