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Open accessJournal ArticleDOI: 10.3390/HORTICULTURAE7030044

Storage Behavior of “Seddik” Mango Fruit Coated with CMC and Guar Gum-Based Silver Nanoparticles

04 Mar 2021-Horticulturae (Multidisciplinary Digital Publishing Institute)-Vol. 7, Iss: 3, pp 44
Abstract: Mango fruit (cv. Seddik) is known as a delicate fruit for storage after harvest. Herein, carboxymethyl cellulose (CMC) and guar gum-based silver nanoparticles (AgNPs) were used as fruit coatings, and their effects on postharvest storage behavior and quality attributes were investigated. AgNPs were synthesized using a chemical reduction approach and then combined with CMC and guar gum as coating bases. Mango fruits were coated with the developed and pre-characterized CMC-AgNPs and guar gum-AgNPs, and then packed and stored at 13 °C for 4 weeks. The results showed an increase in weight loss, respiration rate, total soluble solids (TSS), total sugars, and total carotenoids over the storage period. However, this increase was comparatively less significant in coated fruits compared to uncoated fruits. Firmness and titratable acidity (TA) significantly decreased during storage, but this decrease was less in coated fruits. Silver traces in fruit pulp samples were not detected. These findings showed the efficacy of CMC-AgNP and guar gum-AgNP coatings in delaying mango fruit ripening and maintaining fruit quality during cold storage. Therefore, these coatings could be promising alternative materials for extending the postharvest life and marketing period of mango fruit.

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Topics: Guar gum (59%), Guar (57%), Cold storage (56%) ... read more
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Journal ArticleDOI: 10.1016/J.SCIENTA.2021.110564
Xiaogang Liu1, Yuyang Zhang1, Leng Xianxian1, Qiliang Yang1  +3 moreInstitutions (2)
Abstract: Rational application of field-management technology can not only improve mango (Mangifera indica L.) fresh fruit yield and quality but also improve irrigation water use efficiency (IWUE). However, few studies have involved the simultaneous use of mulch and irrigation-management techniques in hot and dry environments to achieve a relatively good level of performance. We used the entropy weight method (EWM) to explore an optimal mulching and irrigation-management technology for mango production in a dry hot environment. Three irrigation levels [FI, 100% mango evapotranspiration (ETC); DI75, 75% ETC; DI50, 50% ETC] were designed with (SM) and without (NM) sugarcane leaf mulching in 2018 and 2019 in a dry hot environment. The results showed that the photosynthetic rate, stomatal conductance, transpiration rate, leaf water-use efficiency, and carboxylation efficiency in the SM treatment were 12.5% to 83.7% higher than those in the NM treatment in both years. Compared with the NM treatment, the SM treatment increased the fresh fruit yield and IWUE by 45.7% and 49.7% in 2018 and by 46.1% and 63.2% in 2019. The solid-to-acid ratio and sugar-to-acid ratio in the SM treatment were 48.5% and 50.4% higher than those in the NM treatment, respectively, but the titratable acid content decreased by 31.3%. Compared with FI, DI75 increased carotenoid content, total soluble solids, solid-to-acid ratio and sugar-to-acid ratio by 8.4%–40.7%, while it reduced titratable acid by 22.8%. Compared with FI, DI50 reduced fresh fruit yield by 24.3% and 21.9% in 2018 and 2019, respectively, while it increased IWUE by 13.6% and 17.7%. The fresh fruit yield of SMDI75 was the highest, which was 1.42 and 1.44 times that of NMFI in both years, respectively. A comprehensive evaluation by EWM also showed that the SMDI50 treatment had the highest comprehensive scores of mango yield, quality and water-use efficiency, which could provide a basis for the scientific management of mango fertiliser in dry and hot areas of China.

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Topics: Titratable acid (50%)

Open accessJournal ArticleDOI: 10.3390/COATINGS11111406
19 Nov 2021-THE Coatings
Abstract: This study evaluated the effect of edible coating and gaseous ozone on the antioxidant activities and biochemical properties of mango fruit. Mango fruit (cv. Keitt) were coated with moringa leaf extract and carboxymethyl cellulose (EC) before exposure to ozone (0.25 ppm). Gaseous ozone (O3) was administered intermittently for 24 or 36 h, and the control fruit were untreated. The fruit were stored at 10 °C for twenty-one days, then ripened at ambient temperature for seven days. The parameters measured were ascorbic acid, lipid peroxidation, phenolic content, total sugars, and antioxidant capacity (FRAP and DPPH). At the end of storage, the EC + O3 (36 h) had high phenolic content: 175.02 µg GEA/g DM compared to 151.87 µg GEA/g DM and 138.98 µg GEA/g DM for the O3 (24 h) and untreated fruit, respectively. Moreover, the combination of the EC and O3 (36 h) had a higher effect (p < 0.05) on preserving the antioxidant capacity of the mangoes. The EC + O3 (24 h) and EC significantly delayed fruit softening and maintained membrane integrity. Furthermore, the fruit treated with the EC reduced the accumulation of reducing (7.61 mg/mL) and total sugars (8.81 mg/mL) compared to the control treatment, which had a concentration of 12.74 mg/mL and 13.78 mg/mL, respectively. These findings demonstrate that EC combined with gaseous O3 enhanced the antioxidants of mango fruit during storage.

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Topics: Ascorbic acid (54%)


Journal ArticleDOI: 10.1007/S11694-021-01057-8
Sachin Kumar1, Arvind Kumar Baswal1, Asghar Ramezanian2, K.S. Gill3  +1 moreInstitutions (3)
Abstract: Edible coatings form a semi-permeable membrane film which retards the ripening and senescence. In this sight an research was investigated to study the effects of different concentrations of carboxymethyl cellulose (CMC; 1.0, 1.5 and 2.0 g L− 1) on the storage life and quality of guava fruit cv. ‘Allahabad Safeda’ under ambient storage conditions (24 ± 1 °C and 65 ± 5% RH) for up to 12 days. Determination of weight loss, decay, firmness, sugars; soluble solids content (SSC), reducing sugars (RS) and total sugars (TS), titratable acidity, ascorbic acid content, total phenol content and sensory attributes was done. Fruit coated with CMC (1.5 g L− 1) significantly showed reduced weight loss (3.95%) and decay (8.33%) besides maintaining higher firmness (41.68 N), sugars (SSC, RS and TSS; 11.32%, 2.98% and 7.79% respectively), titratable acidity (0.40%), ascorbic acid content (216.11 mg 100 g− 1 pulp), total phenol content (113.90 mg 100 g− 1 pulp) and sensory attributes (7.81) compared with control. Overall, coating with CMC (1.5 g L− 1) significantly extended the storage life and maintained the fruit quality of guava cv. ‘Allahabad Safeda’ for up to 12 days under ambient storage conditions. Further investigations would explore knowledge among growers for successful post-harvest application of CMC to extend the storability and marketability of guava fruit cv. ‘Allahabad Safeda’ under ambient storage conditions.

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Topics: Ascorbic acid (54%), Titratable acid (52%)
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74 results found


Journal ArticleDOI: 10.1021/AC60111A017
Abstract: Simple sugars, oligosaccharides, polysaccharides, and their derivatives, including the methyl ethers with free or potentially free reducing groups, give an orangeyellow color w-hen treated with phenol and concentrated sulfuric acid. The reaction is sensitive and the color is stable. By use of this phenol-sulfuric acid reaction, a method has been developed to determine submicro amounts of sugars and related substances. In conjunction with paper partition chromatography the method is useful for the determination of the composition of polysaccharides and their methyl derivatives.

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Topics: Uronic acid (52%), Dextransucrase activity (50%)

41,792 Citations


Journal ArticleDOI: 10.2307/3001478
01 Mar 1955-Biometrics
Topics: Range (statistics) (52%)

21,973 Citations


Open accessJournal ArticleDOI: 10.1016/J.NANO.2006.12.001
Jun Sung Kim1, Eunye Kuk1, Kyeong Nam Yu1, Jong-Ho Kim1  +10 moreInstitutions (2)
Abstract: The antimicrobial effects of silver (Ag) ion or salts are well known, but the effects of Ag nanoparticles on microorganisms and antimicrobial mechanism have not been revealed clearly. Stable Ag nanoparticles were prepared and their shape and size distribution characterized by particle characterizer and transmission electron microscopic study. The antimicrobial activity of Ag nanoparticles was investigated against yeast, Escherichia coli, and Staphylococcus aureus. In these tests, Muller Hinton agar plates were used and Ag nanoparticles of various concentrations were supplemented in liquid systems. As results, yeast and E. coli were inhibited at the low concentration of Ag nanoparticles, whereas the growth-inhibitory effects on S. aureus were mild. The free-radical generation effect of Ag nanoparticles on microbial growth inhibition was investigated by electron spin resonance spectroscopy. These results suggest that Ag nanoparticles can be used as effective growth inhibitors in various microorganisms, making them applicable to diverse medical devices and antimicrobial control systems.

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Topics: Silver nanoparticle (61%), Antimicrobial (52%), Silver nitrate (51%)

3,828 Citations


Open accessJournal ArticleDOI: 10.1016/J.FOODRES.2009.03.019
Henriette M.C. Azeredo1Institutions (1)
Abstract: Most materials currently used for food packaging are non-degradable, generating environmental problems. Several biopolymers have been exploited to develop materials for eco-friendly food packaging. However, the use of biopolymers has been limited because of their usually poor mechanical and barrier properties, which may be improved by adding reinforcing compounds (fillers), forming composites. Most reinforced materials present poor matrix–filler interactions, which tend to improve with decreasing filler dimensions. The use of fillers with at least one nanoscale dimension (nanoparticles) produces nanocomposites. Nanoparticles have proportionally larger surface area than their microscale counterparts, which favors the filler–matrix interactions and the performance of the resulting material. Besides nanoreinforcements, nanoparticles can have other functions when added to a polymer, such as antimicrobial activity, enzyme immobilization, biosensing, etc. The main kinds of nanoparticles which have been studied for use in food packaging systems are overviewed, as well as their effects and applications.

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Topics: Filler (packaging) (58%), Food packaging (56%)

941 Citations


Journal ArticleDOI: 10.1016/J.COLSURFA.2009.02.008
Abstract: Silver nanoparticles were successfully synthesized from AgNO3 through a simple green route using the latex of Jatropha curcas as reducing as well as capping agent. Nanoparticles were characterized with the help of HRTEM, X-ray diffraction and UV–vis absorption spectroscopy. X-ray diffraction analysis showed that the nanoparticles were of face centered cubic structure. A comparison of radius of nanoparticles obtained from HRTEM image with the optimized cavity radius of the cyclic peptides present within the latex revealed that the particles having radius 10–20 nm are mostly stabilized by the cyclic peptides.

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Topics: Silver nanoparticle (58%), Nanoparticle (51%)

775 Citations