Topic
Gum arabic
About: Gum arabic is a research topic. Over the lifetime, 2197 publications have been published within this topic receiving 47782 citations. The topic is also known as: acacia gum.
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03 Nov 2011
TL;DR: Gum arabic has been known for many thousands of years and there are no artificial substitutes that match it for quality or cost of the production as discussed by the authors, and most commercial gums are derived from Acacia senegal locally known as hashab gum (in the Sudan) and as Kordofan gum around the world.
Abstract: Although there are more than 1100 species of Acacia distributed throughout the tropical and subtropical areas of the world, most commercial gum arabic is derived from Acacia senegal locally known as hashab gum (in the Sudan) and as Kordofan gum around the world. Gum arabic has been known for many thousands of years and there are no artificial substitutes that match it for quality or cost of the production.1 Gum arabic consists mainly of high-molecular weight polysaccharides made up of rhamnose, arabinose, and galactose, glucuronic and 4-O-methylglucuronic acid, and the salts of calcium, magnesium, potassium, and sodium of the two acids.
4 citations
12 Dec 2018
TL;DR: In this article, the effect of Taleh Gum (TG) dosages on concrete properties is investigated with nil or some water reduction compared to a reference concrete mix with water/cement ratio(W/C) of 0.58 and consistence (slump=70±10) mm.
Abstract: This study aims at finding alternative indigenous Sudanese material for concrete admixtures that are necessary for casting concrete in hot weather of the Sudan. It investigates Gum Arabic (GA) namely, Acacia Seyal (known locally as Taleh Gum (TG)). The methodology of the study is based on identifying suitable dosages from literature review. Then the European standards BS EN 934 & BS EN 480 have been used as a paradigm to classify TG functionality as concrete admixture. The effect of TG dosages on concrete properties are investigated with nil or some water reduction compared to a reference concrete mix with water/cement ratio(W/C) of 0.58 and consistence (slump=70±10) mm. The 0.8%TG by cement weight has been found to be the most appropriate dosage with water reduction levels of 11.5% and 7.5% to achieve similar consistence to reference concrete and mortar mixes respectively. Also TG has impaired the concrete compressive strength when used at equal water content of the reference mix. However, upon reducing water, the compressive strength has increased in mixes containing the TG. At 0.8%TG dosage, TG satisfied all criteria set by BS EN 934-2:2009 for a set accelerating water reducer (SA\WR).
4 citations
TL;DR: In this paper, the foundry properties of Gum Arabic were investigated to ascertain its suitability as a composite binder for core production, and the results revealed that the binder has a low refractoriness of 1200°C.
Abstract: Gum Arabic, exudates of several species of acacia, is typical of gum that contains Arabin. Gum Arabic of finest quality is obtained from Acacia Senegal and A. Arabica found in western and northern Africa. The Gum forms a clear thick solution in water. In this work, the foundry properties of Gum Arabic were investigated to ascertain its suitability as a composite binder for core production. Various percentages of Gum Arabic and some conventional foundry binders were prepared and their binding properties determined. Since the binder has low limit hydration, it does not require the use of much water during mixture preparation. For the purpose of this work, 4%-6% of the Gum Arabic was used with conventional binders like bentonite, water glass, industrial starch, linseed oil to prepare core mixtures. A higher percentage (13-15%) of Gum Arabic alone was also used. Foundry properties like permeability, scatter index; mouldability index, moisture content, compressive strength tests and refractoriness were examined. The results revealed that the binder has a low refractoriness of 1200°C. This has the advantage of enhanced and good collapsibility during knock out.
4 citations
Patent•
08 Sep 2009
TL;DR: In this article, an independent claim is included for powder composition, comprising of particles of plant dry extract associated with gum arabic, and spraying the mixture in hot air stream.
Abstract: Powder composition (A), comprises particles of plant dry extract associated with gum arabic. An independent claim is included for producing (A) comprising: preparing a plant decoction in water and extracting obtained liquid by filtration; adding the obtained liquid gum arabic; spraying the mixture in hot air stream; and spraying the mixture in hot air stream. ACTIVITY : Antiinflammatory. MECHANISM OF ACTION : None given.
4 citations
TL;DR: In this paper, three types of binders at various concentrations (% w/v) were used: carrageenan at 0.1, 0.2 and 0.3; gelatin at 1, 2 and 3%; and gum arabic 0.01, 0.,03 and 0.,05.
Abstract: This study investigated the types and concentrations of binders on the physical and antioxidant properties of pelleted sweet corn seeds. Three types of binders at various concentrations (% w/v) were used: carrageenan at 0.1, 0.2 and 0.3; gelatin at 1, 2 and 3%; and gum arabic 0.01, 0.03 and 0.05. The storage periods were 0, 1, 2, 3 and 4 months. The physical properties and qualities of unpelleted and pelleted seeds with non-ionic polyacrylamide (PAM, 5% w/v) were evaluated and compared. The results showed that all three binders were better in pelleting integrity than PAM. Throughout the 4 months’ storage period, pelleted seeds with gum arabic of 0.01% w/v showed that their germination index, seedling growth and shoot growth rates were higher than in unpelleted seeds. The highest amount of anthocyanins, phenolics, carotenoids and the levels of the antioxidant capacities determined by the ferric-reducing antioxidant power, 1,1-diphenyl-2-picrylhydrazyl, and 2, 2-azino-bis (3-ethyl-benzothiazoline-6-sulfonic acid) diammonium salt assays were found in pelleted seeds with gum arabic of 0.01% w/v. The overall quality of seeds depends on their treatment.
4 citations