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gum arabic

Claudia Pelosi, Giuseppe Capobianco, Giorgia Agresti, Giuseppe Bonifazi, Fabio Morresi, Sara Rossi, Ulderico Santamaria, Silvia Serranti
The aim of this work is to investigate the stability to simulated solar radiation of some paintings samples through a new methodological approach adopting non-invasive spectroscopic techniques. In particular, commercial watercolours and iron oxide based pigments were used, these last ones being prepared for the experimental by gum Arabic in order to propose a possible substitute for traditional reintegration materials. Reflectance spectrophotometry in the visible range and Hyperspectral Imaging in the short wave infrared were chosen as non-invasive techniques for evaluation the stability to irradiation of the chosen pigments...
March 5, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Debashish Sarkar, Debasis Sen, B K Nayak, Pramod Bhatt, M N Deo, Bijaideep Dutta
Spray drying had been used to synthesize silica-carbon black nanocomposite micrometric granules with a uniform distribution of the two components. This was achieved by hindering the preferential diffusion of hydrophobic carbon and hydrophilic silica particles in the water droplets during evaporative assembly by introducing gum arabic as a stabilizing agent and network former. Both positive and negatively charged silica nanoparticles were used to check the stability of the sol and its effect on the morphology of the spray dried granules...
February 19, 2018: Colloids and Surfaces. B, Biointerfaces
Nazli Namazi, Bagher Larijani, Leila Azadbakht
BACKGROUND: Previous trials have reported beneficial effects of isolated and complex fiber supplements in obesity treatment. However, recommending fiber supplements in obese subjects remains controversial. To the best of our knowledge, no systematic review has updated the data on the effects of fiber supplements on obesity since 2010 and the need exists for a systematic review on this topic. Accordingly, a systematic review was undertaken to summarize the efficacy of different types of fiber supplements as a complementary treatment for weight management...
November 1, 2017: Archives of Iranian Medicine
Talita A Comunian, Marina Nogueira, Bianca Scolaro, Marcelo Thomazini, Roselayne Ferro-Furtado, Inar Alves de Castro, Carmen S Favaro-Trindade
Intake of omega-3 fatty acids and phytosterols aids in the reduction of cholesterol and serum triglycerides. However, both fatty acids and phytosterols are susceptible to oxidation. This work coencapsulated echium oil (source of stearidonic and alpha-linolenic fatty acids) and beta-sitosterol (phytosterol) by complex coacervation using different combinations of wall materials, and sinapic acid (SA) and transglutaminase as crosslinkers. High encapsulation yields were obtained (29-93% for SA; 68-100% for the mixture of oil and phytosterols) and retention of 49-99% and 16% for encapsulated and free SA, at 30 days-storage...
June 30, 2018: Food Chemistry
Bulei Sheng, Lin Li, Xia Zhang, Wenjuan Jiao, Di Zhao, Xue Wang, Liting Wan, Bing Li, Hui Rong
β-carotene is a lipophilic micronutrient that is considered beneficial to human health. However, there are some limitations in utilizing β-carotene in functional foods or dietary supplements currently because of its poor water dispersibility and chemical stability. A new type of β-carotene bilayer emulsion delivery system was prepared by a layer-by-layer electrostatic deposition technique, for which were chosen bovine serum albumin (BSA) as the inner emulsifier and Arabic gum (GA) as the outer emulsifier...
February 23, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Paolo Romita, Tamara Bufano, Annarita Antelmi, Caterina Foti
No abstract text is available yet for this article.
February 15, 2018: Contact Dermatitis
Yao Li, Jingran Bi, Siqi Wang, Tan Zhang, Xiaomeng Xu, Haitao Wang, Shasha Cheng, Bei-Wei Zhu, Mingqian Tan
Significant wastage of residual liquid food, such as milk, yogurt, and honey, in food container has attracted great attention. In this work, a bio-inspired edible super-hydrophobic interface was fabricated using the FDA-approved and edible honeycomb wax, arabic gum, and gelatin by a simple and low-cost method. The bio-inspired edible super-hydrophobic interface showed multiscale structures, which were similar to that of lotus leaf surface. This bio-inspired edible super-hydrophobic interface displayed high contact angles for a variety of liquid foods and the residue of liquid foods could be effectively reduced using the bio-inspired interface...
February 14, 2018: Journal of Agricultural and Food Chemistry
Giovanna Fia, Claudio Gori, Ginevra Bucalossi, Francesca Borghini, Bruno Zanoni
The wine industry is well known for its production of a large amount of wastes and by-products. Among them, unripe grapes from thinning operations are an undervalued by-product. Grapes are an interesting source of natural antioxidants such as flavonoids, non-flavonoids and stilbenes. A potential strategy to exploit unripe grapes was investigated in this study. Juice from unripe grapes, v. Sangiovese, was obtained by an innovative technique of solid-liquid extraction without the use of solvents. The juice was dried by a spray-drying technique with the addition of arabic gum as support to obtain powder; juice and powder were characterized for antioxidant activity, phenolic concentration and profile...
February 8, 2018: Antioxidants (Basel, Switzerland)
Simon Steger, Heike Stege, Simone Bretz, Oliver Hahn
A non-invasive method has been carried out to show the capabilities and limitations of Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) for identifying of colourants and binders in modern reverse glass paintings. For this purpose, the reverse glass paintings "Zwei Frauen am Tisch" (1920-22), "Bäume" (1946) (both by Heinrich Campendonk), "Lofoten" (1933) (Edith Campendonk-van Leckwyck) and "Ohne Titel" (1954) (Marianne Uhlenhuth), were measured. In contrast to other techniques (e.g. panel and mural painting), the paint layers are applied in reverse succession...
February 2, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Kotaro Konno, Sachiko Shimura, Chihiro Ueno, Toru Arakawa, Masatoshi Nakamura
MLX56 family defense proteins, MLX56 and its close homolog LA-b, are chitin-binding defense proteins found in mulberry latex that show strong growth-inhibitions against caterpillars when fed at concentrations as low as 0.01%. MLX56 family proteins contain a unique structure with an extensin domain surrounded by two hevein-like chitin-binding domains, but their defensive modes of action remain unclear. Here, we analyzed the effects of MLX56 family proteins on the peritrophic membrane (PM), a thin and soft membrane consisting of chitin that lines the midgut lumen of insects...
March 2018: Phytochemistry
J Shanthilal, R Babylatha, M C Navya, A Chakkaravarthi, Suvendu Bhattacharya
Dispersions having chickpea (37%, 40%, and 43%, w/w) and gum arabic (0%, 1%, 2%, 3%, 4%, and 5%, w/w) solids were prepared. These dispersion droplets were fried, and the physical, sensory, and microstructural characteristics of the fried products were determined. The oil content in the fried snack decreased up to 20.3% when the level of chickpea and/or gum in the dispersions was increased. The compression curve for fried snack showed 5 major zones and exhibited the failure phenomenon. Failure force (6.5 to 11...
February 6, 2018: Journal of Food Science
Isara Wattananapakasem, Adele Costabile, Prisana Suwannaporn
Black waxy and red jasmine rice flour (6.5% and 18.7% amylose content, respectively) were modified using pullulanase followed by heat-moisture treatment (Hydrolyzed-HMT) to produce microcapsules that entrapped L. plantarum TISTR 1465. Hydrolyzed-HMT of colored rice flours showed restricted pasting properties, lower breakdown and higher thermal properties than native flour (p<0.05). Hydrolysis treatment was able to promote a low molecular weight starch that easily formed a crystalline structure after HMT...
January 2018: Food Research International
Chiaki Yoshioka, Yoshimasa Ito, Noriaki Nagai
Cilostazol (CLZ) is an anti-platelet agent that is generally used after the onset of cerebral infarction. However, CLZ is a poorly water-soluble drug and a strategy for increasing its bioavailability is required. In the present study, novel oral formulations were designed containing CLZ solid nanoparticles to improve bioavailability. The present study investigated the therapeutic effect of the oral formulations containing CLZ nanoparticles on ischemic stroke using a cerebral ischemia/reperfusion-induced injury model (MCAO/reperfusion mice)...
January 2018: Experimental and Therapeutic Medicine
Fawzi Babiker, Eman Gouda
No abstract text is available yet for this article.
August 2017: Atherosclerosis
Mohammed Hamid, Yassin Abdulrahim, Dandan Liu, Gang Qian, Alamzeb Khan, Kehe Huang
The antioxidant and anti-inflammatory effects of selenium-enriched yeast (SY) and Gum Arabic (GA) have been reported. This study aimed to determine the hepatoprotective effect of SY and GA combination on carbon tetrachloride (CCl4 )-induced chronic liver injury in rats and to explore their synergistic mechanisms of action. Forty adult male Wistar rats randomly allotted to 5 groups: (A) worked as control, (B) was administered CCl4 , (C-E) were fed daily by GA, SY, and GA+SY respectively after mixing with basal diet, following CCl4 -intoxication...
January 19, 2018: Journal of Food Science
Xiaolin Yao, Yu Chen, Meng Shu, Kun Zhang, Zhiming Gao, Ying Kuang, Yapeng Fang, Katsuyoshi Nishinari, Glyn O Phillips, Fatang Jiang
Interfacial engineering approaches have been used to design functional foods so as to control lipase-induced digestion of emulsified lipids and release of bioactive lipophilic components in the gastrointestinal tract. In this study, emulsion droplets with the interface stabilized with gum Arabic (GA) and whey protein isolate (WPI) were prepared by mixing or sequential adsorption. WPI/GA intramolecular soluble complexes (ISCs) have superior emulsifying properties in stabilizing oil-in-water emulsions. The impact of the interfaces for WPI/GA ISC-layered (one-layered) and double-layered emulsions formed by sequential deposition of WPI or GA on the lipolysis of emulsions was investigated using an in vitro simulated gastrointestinal model...
January 19, 2018: Food & Function
Meng Zhao, Ying Wang, Xue Huang, Michael Gaenzle, Zhengjun Wu, Katsuyoshi Nishinari, Nan Yang, Yapeng Fang
Ambient storage of dry powdered probiotics is necessary for manufacturer's cost reduction and customer's convenience. Complex coacervation is a promising microencapsulation technique. In this work, a probiotic matrix of type-A gelatin/gum arabic/sucrose (GE/GA/S) with high coacervation pH was designed, based on the alkaline isoelectric point of type-A gelatin. Bacterial survival during ambient storage at room temperature and certain relative humidity were detected. To clarify the protection factors of the coacervation matrix of GE/GA/S, dry microcapsules of GA, GE, GE/sucrose and GE/GA were prepared as controls and compared in terms of their morphology, moisture content, dynamic vapor absorption and cell viability...
January 18, 2018: Food & Function
Lingying Luo, Yun Bai, Guanghong Zhou
3-Amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (Trp-P-1) is a group 2B carcinogen characterized by the International Agency for Research on Cancer (IARC) and great efforts have been taken to reduce Trp-P-1 mutagenicity to humans. In this study, the effect of a reduction of Trp-P-1 on intestinal absorption as a promising strategy was investigated. The data showed that when 20 mM Trp-P-1 cotransported with 10 mM of sodium carboxymethyl cellulose (CMC), xanthan gum, or carrageenan, the absorption rate of Trp-P-1 was reduced by 31...
January 16, 2018: Journal of Food Science
Sanchita Biswas Murmu, Hari Niwas Mishra
The effect of five coating formulations viz.: (A) 5% Arabic gum (AG)+1% sodium caseinate (SC)+1% cinnamon oil (CE); (B) 5% AG + 1% SC + 2% CE; (C) 5% AG + 1% SC + 1% lemongrass oil (LG); (D) 5% AG + 1% SC + 2% LG; and (E) 5% AG + 1% SC + 2% CE + 2% LG on guava during 35 days storage at 4-7 °C was investigated. Thereafter samples were allowed to ripen for five days at 25 ± 2 °C. The quality of guava was analyzed at an interval of 7, 21, 35 and 40 days. The coating applications resulted in lower activity of PPO & POD, higher DPPH radical scavenging activity, higher retention of ascorbic acid, phenol & flavonoid content, exhibited slower rise of reducing and total sugar in guava pulp...
April 15, 2018: Food Chemistry
Mohammad Anvari, Helen S Joyner Melito
Concentrated emulsions containing both proteins and polysaccharides are the basis for many commercial products; however, the effects of protein-polysaccharide interactions on the functional properties of these complex systems are often poorly understood from a fundamental standpoint. Hence, the objective of this study was to determine the effects of fish gelatin (FG)-gum arabic (GA) complexation at different aqueous phase pH (3.6, 5.0, and 9.0) on concentrated emulsion structure-function relationships. Concentrated emulsions were prepared using FG-GA mixtures and characterized by rheometry and confocal scanning laser microscopy (CSLM)...
December 2017: Food Research International
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