Release of active compounds from agar and agar–gelatin films with green tea extract

Giménez, Begoña; Lacey, Antonio López de; Pérez‐Santín, Efrén; López‐Caballero, M.E.; Montero, P.

doi:10.1016/j.foodhyd.2012.05.014

Cited by 181 publications

(77 citation statements)

References 60 publications

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“…Agar has been chosen because it is not only renewable, biodegradable, biocompatible, and abundantly available, but also it has good film forming ability with high mechanical strength and moderate water resistance (Gimenez, Lopez de Lacey, Perez-Santín, Lopez-Caballero, & Montero, 2013). Agar has been used to form composite films with various biopolymers such as carrageenan and konjac glucomannan (Rhim & Wang, 2013), and gelatin (Gimenez et al, 2013) to improve physical and mechanical properties of the films.…”

Section: Introductionmentioning

confidence: 99%

Effect of post-treatments and concentration of cotton linter cellulose nanocrystals on the properties of agar-based nanocomposite films

Oun

Rhim

2015

Carbohydrate Polymers

100

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Section: Introductionmentioning

confidence: 99%

Effect of post-treatments and concentration of cotton linter cellulose nanocrystals on the properties of agar-based nanocomposite films

Oun

Rhim

2015

Carbohydrate Polymers

100

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“…The water solubility is a measure of the water soluble matter of a film, which is used as an indicator of the film's resistance to water (Giménez et al 2013b). When compared with the control film, the gelatin film incorporated with both LS and BHT showed higher water solubility.…”

Section: Resultsmentioning

confidence: 99%

Retardation of lipid oxidation using gelatin film incorporated with longan seed extract compared with BHT

2014

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The aim of the present work was to apply the gelatin films with different levels of longan seed extract (LS) or butylated hydroxytoluene (BHT) on retardation of lipid oxidation in soybean oil. The films incorporated with various concentrations of aqueous LS (0, 50, 100, 300, and 500 ppm) or BHT (50, and 100 ppm) were developed. The films had transmittance percentages of 60-80 % at 570 nm and showed good light barrier properties when the concentration of LS or BHT increased. About 97 % protein solubility and 41 to 54 % water solubility were obtained for the developed films. Antioxidative activity of gelatin films incorporated with LS increased markedly with increasing storage time as indicated by the increase in DPPH radical scavenging activity (41-50 %) (P < 0.05). Films incorporated with LS or BHT showed the preventive effect on lipid oxidation of soybean oil during 30 days of storage. At the level of 500 ppm, LS provided the highest efficacy for lipid oxidation retardation as evidenced by lower conjugated diene (CD) values (P>0.05). According to these findings, gelatin film incorporated with longan seed extract or BHT could be used as a tool to prolong the shelf-life of oily foods.

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“…Besides polyphenols, GTE contains additional antioxidants such as carotenoids, tocopherols (vitamin E derivatives) and vitamin C. Tea contains also minerals that function as co-factors in antioxidant enzymes: zinc, selenium and manganese. Polyphenols have additional mechanisms in which they reduce oxidation level besides direct role as antioxidants [32,33]. The antifibrotic effect of GTE explained by some authors who reported that it might be through the inhibition exerted by GTE on gelatinases involved in the damage to lung extracellular matrix, matrix metalloproteinases [18] and others have demonstrated that GTE both inhibits the signal transduction of TGF-β by binding to transforming growth factor receptor II (TGFR) and attenuates the expression of α-smooth muscle actin (α-SMA) in MRC-5 cells (human lung fibroblasts), which is a myofibroblast cell line, when it is stimulated by TGF-β.…”

Section: Discussionmentioning

confidence: 99%

Modulatory effects of green tea and aloe vera extracts on experimentally-induced lung fibrosis in rats: histological and immunohistochemical study

Salem¹,

El-Azab²,

Faruk³

2014

J Histol Histopathol

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Background: Pulmonary fibrosis (PF) is a multifactorial disease in the human. The existing therapeutic agents display unfavorable adverse effects. Consequently, the discovery of novel therapeutic agents for the prevention and treatment of PF remains a challenge. Aim of the work: Evaluation of the modulatory effect of green tea and aloe vera (AV) extracts on bleomycin induced pulmonary fibrosis in rats. Material and methods: Fifty adult male rats were utilized and divided equally into 5 groups. The first was served as control group, the second was the bleomycin (BLM) group (daily I.P. dose 10 mg/kg body weight for 10 days), the third was the green tea (GTE) group which was given daily oral dose of GTE (150 mg/ kg b.w.) for 14 days with concomitant IP administration of BLM for 10 consecutive days, the fourth was the Aloe vera (AV) group which was given daily oral dose of AV (300 mg/kg b.w.) for 14 days with concomitant IP administration of BLM for 10 consecutive days, the fifth was the GTE and AV group. Lung samples were taken 14 days after the treatment. Paraffin sections were prepared for histological; H&E and Masson's trichrome staining and immunohistochemical study. Results: Green tea group revealed normal bronchioles, alveoli with apparently thin interalveolar septa, few cellular infiltration and extravasated RBCs and induced a significant decreased (P≤0.05) in collagen fibers accumulation and in caspase-3 expression compared with BLM group. Group IV (AV) and group V (GTE and AV) revealed alveoli with apparently thicker interalveolar septa, more cellular infiltration, congested blood vessels and extravasated RBCs in comparison with GTE group. Group IV showed insignificant decreased (P≤0.05) in collagen fibers accumulation compared with BLM group while the decrease was significant in caspase-3 expression. Group V showed insignificant decreased (P≤0.05) in collagen fibers accumulation and in caspase-3 expression compared with BLM group. Conclusion: Green tea and aloe vera partially alleviate pulmonary fibrosis induced by bleomycin in rats. Supporting the potential benefits of using aloe vera and green tea as a potential novel therapeutic agents by diet.

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Release of active compounds from agar and agar–gelatin films with green tea extract

Cited by 181 publications

References 60 publications

Effect of post-treatments and concentration of cotton linter cellulose nanocrystals on the properties of agar-based nanocomposite films

Effect of post-treatments and concentration of cotton linter cellulose nanocrystals on the properties of agar-based nanocomposite films

Retardation of lipid oxidation using gelatin film incorporated with longan seed extract compared with BHT

Modulatory effects of green tea and aloe vera extracts on experimentally-induced lung fibrosis in rats: histological and immunohistochemical study

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