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Recent Scenario of Solid Biopolymer Electrolytes Based Dye-Sensitized Solar Cell
Published in Hieng Kiat Jun, Nanomaterials in Energy Devices, 2017
Rahul Singh, Pramod K. Singh, B. Bhattacharya
Gum Tragacanth: Gum Tragacanth is an exudate of Astragalus, a perennial short brush in Asia. It is slightly acidic and occurs as Ca, Mg, or Na salt. It contains neutral highly branched arabinogalactan and tragacanthic acid (linear (1→4)-linked α-D-galacturonopyranosyl units, with some substitutions). It is highly viscous with some emulsification properties. The highest conductivity reported for NaOH based biopolymer was 88.8 × 10−3 S/cm at room temperature (Arora et al. 2014).
Electrosprayed gum tragacanth/zinc oxide nanoparticles and their application as antibacterial agent on cotton terry towel
Published in The Journal of The Textile Institute, 2021
Fariba Yazdizadeh, Hossein Tavanai, Farzaneh Alihosseini
Gum tragacanth, a natural acidic polysaccharide, which is obtained as an exudate from the branches of Astragalus gummifer belongs to the Fabaceae family and is native to western Asia (Phillips & Williams, 2009). Gum tragacanth is composed of two polysaccharide fractions namely, water-soluble tragacanthin (30–40%) and water-swellable bassorin (60–70%) (Kora & Arunachalam, 2012). Tragacanthin is composed of galactose and arabinose as well as sugars such as d-xylose, l-fructose and d-mannose (Tischer et al., 2002). Gum tragacanth has so far found many applications in the food industry, pharmaceutical formulations and cosmetic products (Ramawat & Mérillon, 2015), as a natural stabilizing and binding agent thanks to its high viscosity and stability at a wide range of pH and temperature (Ghayempour & Montazer, 2017).
Experimental analysis and modeling of the thermal conductivities for a novel building material providing environmental transformation
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Fatih Koçyiğit, Fatih Ünal, Şermin Koçyiğit
The tragacanth in the samples is a type of gum obtained from the drying of resin, naturally exuding or exuded from the trunk of a thorn called as Astragalus, under natural conditions (TS 523, (1967), Weiping 2000). It is a multi-branched, heterogeneous, hydrophilic, and carbohydrate polymer. It is 1–3 cm long, has a width of at least 0.5 cm and is in the form of pale white or yellowish color strips. It is obtained as a result of the scotches applied to the body. Tragacanth brings high viscosity to the product into which it is added and it is odorless. Laminated tragacanth in the study was pulverized by an electric motor grinder for better and faster melting. When the effect of tragacanth on the thermal conductivity was examined in the present study, it was found that tragacanth had a low thermal conductivity and liquid tragacanth carried the air-filled pores in its structure after the drying process, into the mixture and formed artificial pores.
The controlled release, bioactivity and osteogenic gene expression of Quercetin-loaded gelatin/tragacanth/ nano-hydroxyapatite bone tissue engineering scaffold
Published in Journal of Biomaterials Science, Polymer Edition, 2023
Parisa Madani, Saeed Hesaraki, Maryam Saeedifar, Navid Ahmadi Nasab
The novel component of the scaffold we focused on is tragacanth, which is a gum, derived from a native Iranian herb that helps to simulate bone features in the scaffold. Tragacanth is a polymer with antibacterial properties and high molecular weight that is soluble in water or well dispersed in it. It is a complex, heterogeneous and anionic carbohydrate that is highly resistant against heat, acidity and aging [9]. Tragacanthin, Galacturonic acid part of tragacanth, is electrically neutral and water soluble with high molecular weight that makes highly viscous solutions. Bassorin is another part of tragacanth, which is an insoluble combination of methoxylated acids that swells to create gel or viscous solutions [10]. According to previous studies [11], it has been proven that using gum tragacanth (GT) based hydrogel increases osteoconductivity compared to collagen hydrogel and tissue culture plate. Furthermore, it has been demonstrated that tragacanth is a non-toxic material that has the highest ALP activity and bone mineralization with the highest expression of Runx-2, Osteonectin and Osteocalcin by the bone mesenchymal stem cells, which are the main markers of bone formation and osteogenic differentiation. Gum tragacanth has also been utilized as an agent for reducing viscosity and omitting toxic cross-linkers in gelatin-chitosan solutions, playing a role as a binder [12]. Moreover, adding it to common matrices used for encapsulation of bone cells used in bone tissue engineering, like calcium alginate (CA) beads, improves the degradation rate and swelling of the beads and stimulates cell proliferation and differentiation [13].