scholarly journals Active and Robust Composite Films Based on Gelatin and Gallic Acid Integrated with Microfibrillated Cellulose

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2831
Author(s):  
Yinghua Luo ◽  
Yanbei Wu ◽  
Yali Wang ◽  
Liangli (Lucy) Yu
Keyword(s):  
Gallic Acid ◽  
Food Packaging ◽  
Radical Scavenging Activity ◽  
Crosslinking Agent ◽  
Radical Scavenging ◽  
Microfibrillated Cellulose ◽  
Food Preservation ◽  
Commercial Application ◽  
Scavenging Activity ◽  
Compact Structure

Background: Gelatin is a renewable, biodegradable, and inexpensive food polymer. The insufficient mechanical and functional properties of gelatin-based films (GBF) restrict their commercial application in food packaging. This work proposed a facile strategy to prepare an active and robust GBF that has the potential to be used in food packaging. Methods: A strong and active GBF was prepared based on the principle of supramolecular chemistry via the incorporation of gallic acid (GA) as an active crosslinking agent and of microfibrillated cellulose (MFC) as a reinforcing agent. Results: Under the appropriate concentration (1.0 wt%), MFC was evenly dispersed in a gelatin matrix to endow the film with low surface roughness and compact structure. Compared with the GF, the tensile strength and elongation at break of the resultant film reached 6.09 MPa and 213.4%, respectively, representing the corresponding improvement of 12.8% and 27.6%. Besides, a significantly improved water vapor barrier (from 3.985 × 10−8 to 3.894 × 10−8 g·m−1·Pa−1·s−1) and antioxidant activity (from 54.6% to 86.4% for ABTS radical scavenging activity; from 6.0% to 89.1% for DPPH radical scavenging activity) of GBFs were also observed after introducing the aromatic structure of GA and nano-/microfibrils in MFC. Moreover, the UV blocking performance and thermal stability of GGF and GGCFs were also enhanced. Conclusions: this work paves a promising way toward facile preparation of multifunctional GBFs that have great potential to be used in fabricating active and safe food packaging materials for food preservation.

scholarly journals HPLC Evaluation of Phenolic Profile, Nutritive Content, and Antioxidant Capacity of Extracts Obtained fromPunica granatumFruit Peel

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Sushil Kumar Middha ◽  
Talambedu Usha ◽  
Veena Pande
Keyword(s):  
Antioxidant Activity ◽  
Gallic Acid ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Water Extract ◽  
Scavenging Activity ◽  
Fruit Peel ◽  
Phenolic Profile ◽  
Antioxidant Power

This study revealed polyphenolic content, nutritive content, antioxidant activity, and phenolic profile of methanol and aqueous extracts ofPunica granatumpeel extract. For this, extracts were screened for possible antioxidant activities by free radical scavenging activity (DPPH), hydrogen peroxide scavenging activity and ferric-reducing antioxidant power (FRAP) assays. The total phenolics and flavonoid recovered by methanolic (MPE) and the water extract (AQPE) were ranged from 185 ± 12.45 to 298.00 ± 24.86 mg GAE (gallic acid equivalents)/gm and 23.05 ± 1.54 to 49.8 ± 2.14 quercetin (QE) mg/g, respectively. The EC50of herbal extracts ranged from 100 µg/ml (0.38 quercetin equivalents), for AQPE, 168 µg/ml (0.80 quercetin equivalents), for MPE. The phenolic profile in the methanolic extracts was investigated by chromatographic (HPLC) method. About 5 different flavonoids, phenolic acids, and their derivatives including quercetin (1), rutin (2), gallic acid (3), ellagic acid (4), and punicalagin as a major ellagitannin (5) have been identified. Among both extracts, methanolic extract was the most effective. This report may be the first to show nutritive content and correlation analysis to suggest that phenols and flavonoids might contribute the high antioxidant activity of this fruit peel and establish it as a valuable natural antioxidant source applicable in the health food industry.

scholarly journals Gallic Acid and Quercetin as Intelligent and Active Ingredients in Poly(vinyl alcohol) Films for Food Packaging

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1999 ◽  
Author(s):  
Francesca Luzi ◽  
Elisa Pannucci ◽  
Luca Santi ◽  
José Maria Kenny ◽  
Luigi Torre ◽  
...  
Keyword(s):  
Gallic Acid ◽  
Vinyl Alcohol ◽  
Food Packaging ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Casting Process ◽  
Poly Vinyl Alcohol ◽  
Hydroxyl Groups ◽  
Active Ingredients

Gallic acid (GA) and quercetin (QC) were used as active ingredients in poly(vinyl alcohol) (PVA) film formulations obtained by solvent casting process. The effect of two different percentages (5 and 10 % wt.) on morphological behavior, thermal stability, optical, mechanical, and release properties of PVA were investigated, while migration with food stimulants and antioxidant properties were tested taking into account the final application as food packaging systems. The results showed how different dispersability in PVA water solutions gave different results in term of deformability (mean value of ε PVA/5GA = 280% and ε PVA/5QC = 255%, with 190% for neat PVA), comparable values for antioxidant activity at the high contents (Radical Scavenging Activity, RSA(%) PVA/10GA = 95 and RSA(%) PVA/10QC = 91) and different coloring attitude of the polymeric films. It was proved that GA, even if it represents the best antioxidant ingredient to be used with PVA and can be easily dispersed in water, it gives more rigid films in comparison to QC, that indeed was more efficient in tuning the deformability of the PVA films, due the presence of sole hydroxyl groups carrying agent. The deviation of the film coloring towards greenish tones for GA films and redness for QC films after 7 and within 21 days in the simulated conditions confirmed the possibility of using easy processable PVA films as active and intelligent films in food packaging.

scholarly journals Radical scavenging activity of an inulin-gallic acid graft and its prebiotic effect on Lactobacillus acidophilus in vitro growth

2017 ◽  
Vol 29 ◽  
pp. 135-142 ◽  
Author(s):  
Daniel Arizmendi-Cotero ◽  
Adriana Villanueva-Carvajal ◽  
Rosa María Gómez-Espinoza ◽  
Octavio Dublán-García ◽  
Aurelio Dominguez-Lopez
Keyword(s):  
Gallic Acid ◽  
Lactobacillus Acidophilus ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Scavenging Activity ◽  
In Vitro Growth

scholarly journals EVALUATION OF PHYTOCONSTITUENTS, AND ANTIMICROBIAL AND ANTIOXIDANT ACTIVITY OF JUGLANS REGIA FROM KASHMIR REGION

2019 ◽  
pp. 89-92
Author(s):  
ISHFAQ KHAN ◽  
NEHA CHAUHAN ◽  
CHAUHAN PK ◽  
MOHD. AZHAR KHAN
Keyword(s):  
Free Radical ◽  
Gallic Acid ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Oral Bacteria ◽  
Free Radical Scavenging ◽  
Free Radical Scavenging Activity ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Standard Curve

Objectives: The main focus of the present study was to evaluate the antimicrobial efficacy (against oral pathogenic bacteria), free radical scavenging activity, and total phenolic and flavonoids content (TPC and TFC) of methanolic extract (ME) of J. regia obtained from Kashmir region. Methods: The plant part was collected and its ME was prepared. ME was subjected to antibacterial activity against oral bacteria such as Staphylococcus aureus, Streptococcus mutans, and Pseudomonas aeruginosa. The free radical scavenging activity was determined using 2,2-diphenyl- 1-picrylhydrazylhydrate (DPPH) assay. TPC and TFC were also determined using a standard curve equation of gallic acid and quercetin. A standard curve using different concentrations of gallic acid and quercetin was drawn from which the concentration of phenols in the test sample was calculated and expressed in mg/g. Results: The ME of J. regia was found effective against all the strains of microorganisms responsible for oral infection understudy. It was also observed that scavenging of DPPH increased with the increase in concentration for both standard ascorbic and methanolic bark extract of J. regia showing its antioxidant potential. The TPC and TFC of ME was found to be 43.35±0.079 and 17.28±0.125. Conclusions: The results obtained from the study clearly indicate that the walnut bark from Kashmir region can be a good candidate for employment as an antibacterial against oral pathogens. J. regia bark was found to be a good source of healthy compounds such as phenolic and flavonoids, suggesting that its bark could be useful to prevent diseases in which free radicals are present.

Gallic Acid Ameliorates Cyclophosphamide-Induced Neurotoxicity in Wistar Rats Through Free Radical Scavenging Activity and Improvement in Antioxidant Defense System

2015 ◽  
Vol 13 (4) ◽  
pp. 402-419 ◽  
Author(s):  
Ademola Adetokunbo Oyagbemi ◽  
Temidayo Olutayo Omobowale ◽  
Adebowale Bernard Saba ◽  
Ebunoluwa Racheal Olowu ◽  
Racheal Omolola Dada ◽  
...  
Keyword(s):  
Free Radical ◽  
Gallic Acid ◽  
Wistar Rats ◽  
Antioxidant Defense ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Antioxidant Defense System ◽  
Free Radical Scavenging ◽  
Scavenging Activity ◽  
Defense System

scholarly journals Edible coatings for strawberry based on extracellular compounds of Humphreya coffeata

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5556-5573
Author(s):  
Alma Rosa Agapito-Ocampo ◽  
Benjamín Amaro-Guadarrama ◽  
Gerardo Díaz-Godínez ◽  
Ma de Lourdes Acosta-Urdapilleta ◽  
Liliana Aguilar-Marcelino ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Food Preservation ◽  
Edible Coatings ◽  
Scavenging Activity ◽  
Total Phenols ◽  
Phenol Content ◽  
Gallic Acid Equivalent

Edible coatings (EC) are a biodegradable alternative for food preservation. In this work EC based on extracellular compounds of Humphreya coffeata and pectin (PHC) were elaborated and characterized through testing on strawberries. Two PHC types were obtained (PHC1, which settled, and PHC2, which floated during the first separation). The conservation period of the strawberry and the phenol content and antioxidant activity in strawberries with the EC were determined. Four EC were prepared (EC1, EC2, EC3, and EC4), in which EC1 did not contain any PHC, EC2 contained PHC1, EC3 contained PHC2, and EC4 contained both PHCs. Three EC types (EC2, EC3, and EC4) delayed the decay of strawberries approximately 90% at 20 °C during the first 10 days of evaluation, and at 4 °C the effect was between 75 and 90% after 25 days of experimentation. However, EC3 and EC4, both of which contained PHC2, presented the best results. The content of total phenols (approximately 55 mg (gallic acid equivalent (GAE)/mL) and the free radical scavenging activity were 35% with ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and 75% with DPPH (2,2-diphenyl-1-picrylhydrazyl) in strawberries with EC. Thus, EC are an alternative for preserving strawberries without losing their antioxidant capacity.

Optimization of Pyrogallol Autoxidation Conditions and Its Application in Evaluation of Superoxide Anion Radical Scavenging Capacity for Four Antioxidants

2016 ◽  
Vol 99 (2) ◽  
pp. 504-511 ◽  
Author(s):  
Qing-An Zhang ◽  
Xi Wang ◽  
Yun Song ◽  
Xue-Hui Fan ◽  
Juan Francisco García Martín
Keyword(s):  
Ascorbic Acid ◽  
Antioxidant Capacity ◽  
Gallic Acid ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Superoxide Anion Radical ◽  
Scavenging Activity ◽  
Pyrogallol Autoxidation

Abstract In this study, some factors influencing pyrogallol autoxidation, including EDTA, temperature, and solvent, were systematically investigated to improve its feasibility in the evaluation of antioxidants for the first time. Subsequently, the improved pyrogallol autoxidation conditions were used to assess the superoxide anion scavenging activity (SASA) of four commonly used antioxidants, namely, ascorbic acid, rutin, catechin, and gallic acid, by both the reaction rate method and the terminated method. The results indicate that pyrogallol autoxidation could be successfully used to determine the antioxidant capacity of ascorbic acid and rutin, which correspondingly suggests the feasibility of its use to measure the superoxide anion radical scavenging activity of polysaccharides and flavonols, because these compounds have a similar basic structural unit as ascorbic acid and rutin, respectively. Unexpectedly, however, pyrogallol autoxidation cannot be used to evaluate the SASA of catechin and gallic acid, although their good antioxidant capacity was confirmed by the 1,1-diphenyl-2-picrylhydrazyl assay. Together, these results suggest the importance of noting the conditions used for pyrogallol autoxidation when assessing the SASA of targeted compounds.

Antioxidant Activities of Xiao-Yan-Hua-Jie-San and Identification of the Active Components

2013 ◽  
Vol 781-784 ◽  
pp. 1020-1026
Author(s):  
Yu Ping Li ◽  
Li Hua Yao ◽  
Guang Jie Wu ◽  
Fu Quan Jiang ◽  
Xiang Yuan Xiong ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Gallic Acid ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Model Systems ◽  
Total Phenolic ◽  
Dependent Manner ◽  
Scavenging Activity ◽  
Concentration Dependent Manner

Xiao-Yan-Hua-Jie-San (XYHJS), a traditional Chinese prescription, is used as a medication recipe to clinically treat inflammation and hepatitis. In previous study, we reported the hepatoprotective effects of XYHJS by increasing an antioxidant enzyme activity in mice. In the present study, the main bioactive components of XYHJS and their antioxidant activity were further investigated by using different model systems in vitro. The total phenolics content in the extract of XYHJS was determined by the Folin-Ciocalteu method. Analysis of the major phenolic compounds in the extract of XYHYS was carried out by high-performance liquid chromatography (HPLC) and thin layer chromatographic (TLC) method. The total phenolic content of the extract was 2.84 ± 0.06 mg gallic acid equivalent (GAE)/g extract powder. The phenolic acid in XYHJS was found to be gallic acid (GA). The content of GA was 2.80 mg/ml by HPLC (n=5, RSD=1.26%). Furthermore, the antioxidant activity of XYHJS extract was determined by 1, 1-diphenyl-2-picrylhydrazyl radical (DPPH) scavenging activity and hydroxyl free radicals (·OH) scavenging activity assay. The radical scavenging activity of XYHJS increased significantly in a concentration-dependent manner. At a concentration of 2.5 mg/ml, the DPPH and ·OH scavenging activity was 89.94% and 91.53%, respectively. It can be concluded that the content of GA in XYHJS is very high and it is the main contributor to the antioxidant activity of XYHJS. Our study indicates that XYHJS prescription could be considered to be an effective agent in the prevention of various liver diseases associated with oxidative stress.

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