Showing papers on "Guar gum published in 2018"
TL;DR: Various possible composites of guar gum and their most probable applications in different fields are summarized in this review article.
267 citations
TL;DR: The synthesized hydrogel revealed tremendous potential as soil conditioning material for agricultural applications by improving its porosity, moisture absorption and retention capacity significantly and was confirmed to be biodegradable.
167 citations
TL;DR: A compact three-dimensional dynamic cross-linked net formed of glycerol-water-borax net that has self-adhesive properties and strain sensitivity and the hydrogel exhibited an ultrafast self-healing ability and the antifreeze and moisturizing properties of the gel are improved.
Abstract: Recently, flexible, injectable, and strain-sensitive hydrogels have attracted great research interest for application as electronic skin and wearable strain sensors. The synergistic integration of high flexibility, rapid self-healing, and antifreezing properties makes injectable, strain-sensitive, and self-healing guar gum hydrogels still a great challenge. Here, inspired by the strong hydrogen bonding of glycerol and water, the chelation cross-linking between glycerol and borax, we constructed a compact three-dimensional dynamic cross-linked net formed of glycerol-water-borax. Under stress, dynamic interactions of glycerol-water-borax net act as sacrificial bond energy for effective dissipation, which enables the hydrogel to achieve high flexibility, stretchability, and injectability. More importantly,because of the presence of glycerol, the antifreeze and moisturizing properties of the gel are improved. The hydrogel also exhibited an ultrafast self-healing ability of only 15 s. In addition, the results show that the hydrogel has self-adhesive properties and strain sensitivity. The hydrogels have the potential to be used to make flexible, wearable, and 3D-printable electronic skin and strain-sensitive sensors.
143 citations
TL;DR: In this paper, the authors compared a commercial wax (CW) and uncoated fruit on post-harvest quality of Valencia oranges held for up to four weeks at 20°C and 5°C with an additional storage for 7 d at 20°C.
107 citations
TL;DR: In this article, the effects of different gums viz. gum arabic (GA), guar gum (GG), k-carrageenan gum (KG), and xanthan gum (XG) on rheological and 3D printing characteristics of vitamin D enriched orange concentrate (OC) wheat starch (WS) blends were evaluated and compared.
Abstract: This study examined the effects of different gums viz. gum arabic (GA), guar gum (GG), k-carrageenan gum (KG), and xanthan gum (XG) on rheological and 3D printing characteristics of vitamin D (Vit D) enriched orange concentrate (OC) wheat starch (WS) blends. The textural and microstructural properties of printed objects from above mixture were evaluated and compared. The addition of gums induced an increase in apparent viscosity, storage modulus (G′), and loss modulus (G″) of the OC-WS mixtures, while GA decreased the apparent viscosity and G′. Nuclear magnetic resonance (NMR) analysis of 3D printed samples revealed that the movement of transverse time (T2) toward closer to 0 ms indicated an increase in immobilized and bound water populations suggesting the gel formation. The slight shift toward shorter wavelength in FT-IR results for the broadband centered around 3400 cm−1 after addition of gums possibly caused an increase of G′ and load bearing capacity of the blends. 3D printing characteristics revealed that the objects printed using KG containing blend possessed maximum fidelity to the target geometry and good loading bearing capacity, preventing collapsing over time due to the proper G′ value. At tanδ of 0.238, OC-WS-KG mixture achieved the best printing condition. Higher tanδ of GA (0.038) containing samples led to an unwanted collapse of the printed constructs. The objects printed using KG also exhibited the smoothest visible surface as well as microstructure and best mastication properties. Considering the studied features, vitamin D enriched OC with WS-KG was found to be the best match for orange fruit concentrate-based 3D food printing. This work demonstrates the novel ways to develop fortified 3D printed foods.
104 citations
TL;DR: Emulsion-templated approach was adopted to obtain edible oleogels using hydroxypropyl methyl cellulose (HPMC) as the main emulsifier in combination with the usage of thickening agents.
100 citations
TL;DR: Results showed that neutral pH favoured the adsorption process andKinetics results were indicative of the physical interactions between the thiophanate methyl and GG-crosslinked-SY NHS surface, and Thermodynamic results have shown the spontaneous and endothermic adsorptive process.
95 citations
TL;DR: Galactomannan, a water-soluble heteropolysaccharide was isolated and purified from seed of fenugreek locally called as Kasuri Methi and its functional attributes were studied in detail.
95 citations
TL;DR: Wang et al. as mentioned in this paper used Guar gum (GG), a widely available pollution-free natural polymer, as the main ingredient to produce modified Guar Gum -GGTCS by chemically modifying its functional group, followed by employing infrared spectroscopy and thermogravimetric analysis to characterize the chemical structure and thermal stability of GG and its modified product GGTCS.
89 citations
TL;DR: Chitosan-Guar gum blend Silver Nanoparticle bionanocomposite (CGS) was synthesized by incorporating palm shell extract capped nano silver particles during the formation of blend.
75 citations
TL;DR: Results showed higher functional properties of lysozyme-guar gum conjugate and the antibacterial activity also increased significantly against gram positive pathogens.
TL;DR: The results showed that the hydrocolloids exert a great influence on the process rheokinetics and on the resulting rheological response.
TL;DR: In this article, a study was carried out to maintain the quality of sweet cherry by using the guar gum (GG) and ginseng extract (GSE) coatings during storage at 20°C and 70-75% RH for 8 days.
Abstract: The present study was carried out to maintain the quality of sweet cherry by using the guar gum (GG) and ginseng extract (GSE) coatings during storage at 20 °C and 70–75% RH for 8 days. Coatings with 0.15% (m/v) GG + 0.1% (m/v) calcium chloride + 0.1% (m/v) glycerol + 1% (m/v) GSE presented the best characteristics to uniformly coat sweet cherry surface. Quality (weight loss, decay percentage, firmness), respiration rate, nutrient components (total soluble solids, titratable acid, ascorbic acid, total phenols, anthocyanins) and malondialdehyde evaluations were performed. Coatings with GG-GSE controlled water loss and delayed loss of firmness and of titratable acid, ascorbic acid and total phenols, compared with untreated fruit. Overall, coatings developed in this study extend sweet cherries’ shelf life for about 8 days, demonstrating for the first time that the combination of guar gum and ginseng extract as edible coating materials has great potential in expanding the shelf life of fruits.
TL;DR: It is concluded that CMC, XG and GG improved the texture and cooking quality of dried-natural fermented rice noodles but they had negative effects on starch digestion rate and estimated GI.
TL;DR: Guar gum and its derivatives have attracted an increasing amount of attention over the last three decades, predominantly due to two main reasons: firstly environmental concerns, and secondly the realization that our petroleum resources are finite as mentioned in this paper.
TL;DR: The composition of potato starch and guar gum based biodegradable composite film was optimised based on physical, optical, mechanical and barrier properties and the structural characterisation of the optimised film was analysed by FESEM and XRD which point to the semi-crystalline nature of the developed film.
TL;DR: Guar gum based hydrogels have evoked great attention in research as well as in industry for exploring miscellaneous applications in the field of water purification, medicine, agriculture, explosive...
TL;DR: In this article, a grafted copolymer of guar gum/polyacrylic acid (GG/Poly(AA)) has been synthesized by two-step free radical graftcopolymerization using ammonium persulphate (APS) as initiator and N, N′−methylenebisacrylamide (MBA) as cross-linking agent.
TL;DR: A review of the application of various ATRP techniques to modify non-cellulosic polysaccharides under homogenous condition is given in this paper, with a focus on pre-functionalization or protection of some functional groups in the backbone required in some cases to prepare a precursor with higher solubility in organic solvents.
TL;DR: In this paper, the enhancement of pH response capability was demonstrated with a 5-flourouracil (5-FU)-loaded guar gum (GG)-grafted-lysine-β-cyclodextrin (Lβ-CD) drug carrier.
Abstract: The physiological environment is a crucial factor in biomedical systems, which can be regulated with relative ease both in vitro and in vivo Control of pH has emerged as a powerful strategy in cancer therapy because pH has a profound effect on the interaction of a polymeric-based drug delivery system with tumor cells In this regard, the enhancement of pH response capability was demonstrated with a 5-flourouracil (5-FU)-loaded guar gum (GG)-grafted-lysine-β-cyclodextrin (L-β-CD) drug carrier The size, charge, morphology, and encapsulation efficiency of the 5-FU-loaded polymeric carrier were characterized for the control and sustained release of the drug In a specific cancer pH environment, 5-FU-loaded GG-g-L-β-CD could rapidly swallow, disassemble, and release 5-FU by accepting or losing electrons In vitro observations indicate that GG-g-L-β-CD dramatically releases 5-FU in an acidic environment rather than in a basic environment In vitro antitumor activity tests showed that 5-FU-loaded GG-g-L-β-CD had a higher cytotoxicity against KB cells, with an IC50 value of 138 μg ml−1 The reactive oxygen species (ROS) generated by 5-FU in the KB cells showed efficient suppression of tumour cell growth The Hoechst assay revealed the active nature of 5-FU in the cell nucleus of the KB cells The potential mitochondrial damage by apoptosis in KB cells greatly increased cell death Therefore, due to its active nature, the pH-sensitive 5-FU-loaded GG-g-L-β-CD carrier is a potential drug delivery system for safe and effective cancer therapy, and it can be useful for inhibiting tumour cell growth
TL;DR: Outcomes of the current study suggest that partially hydrolyzed guar can be considered as potential prebiotic compound that may further stimulate the growth of potentially probiotic bacteria or native gut microflora.
TL;DR: The results suggest that the synergistic effect of GG and LBG addition on rheological properties of XG appears to be due to intermolecular interaction occurred between XG and galactomannans, as confirmed by dynamic rheology properties.
TL;DR: In this article, the authors explored processing procedures that minimize disruption to physicochemical properties such as changes to temperature, molecular weight and contact times, and developed novel composite DF blends that draw on individual characteristics.
TL;DR: The sonochemical synthesis of Fe3O4-guar gum nanocomposite does not require stringent experimental conditions or any toxic agents, and thus, a straightforward, rapid, efficient and green method for the fabrication of highly active catalysts for treating environmental pollutants.
TL;DR: In this paper, the authors used guar gum, a long chain polysaccharide, to remove Pb2+ from turbid wastewater containing kaolinite, which achieved 83% removal at an initial Pb concentration of 15 ǫ l−1.
TL;DR: The analysis of variance suggested that xanthan gum could restrict the swelling of starch granules and the destruction of granule structure more effectively than other hydrocolloids tested, owing to the efficient thickening property.
TL;DR: In this paper, the use of guar gum and two derivatives as LIB positive electrodes binders was investigated and it was shown that these polymers are electrochemically stable within the operating voltage of LIBs and do not show evidence of thermal decomposition up to 200°C.
TL;DR: In this article, the authors investigated the potential of guar gum and a double emulsion to increase the thermal stability of anthocyanins and found that guar-gum addition significantly increased the color stability and bathochromic displacement of the samples, suggesting the occurrence of a co-pigmentation process.
TL;DR: It was observed that ethanolic essential oils supplemented coatings conferred a greater retention of fruit quality as compared to both controls and suggested the application of these edible coatings for preservation of unripe green mangoes during cold storage.