Evaluation of the Physicochemical Properties and Antimicrobial Activities of Bioactive Biodegradable Films

2013 ◽  
Vol 6 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Mary S. Khalil ◽  
Zahra S. Ahmed ◽  
Aml S. Elnawawy
Keyword(s):  
Physicochemical Properties ◽  
Antimicrobial Activities ◽  
Biodegradable Films

scholarly journals Improvement in Physicochemical, Microbial, and Sensory Properties of Common Squid (Todarodes pacificus Steenstrup) by Superheated Steam Roasting in Combination with Smoking Treatment

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Lisa Andriani Sutikno ◽  
Khawaja Muhammad Imran Bashir ◽  
Hari Kim ◽  
Yeseul Park ◽  
Na Eun Won ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Shelf Life ◽  
Superheated Steam ◽  
Antimicrobial Activities ◽  
Food Ingredients ◽  
Significance Level ◽  
Texture Profile ◽  
Todarodes Pacificus ◽  
Common Squid ◽  
The Common

The common squid (Todarodes pacificus) is one of the most widely consumed food ingredients in East Asian countries, especially Korea and Japan. It is generally marketed raw, which leads to inconvenient preparation, less commercial value, and short shelf life. Therefore, in order to handle these problems, superheated steam roasting (260°C heater, 240°C steam for 4 min) in combination with smoking treatment (15 min) using sawdust from the oak tree was used to process squid before mixing with vegetables and special sauce to make a ready-to-eat squid dish in an effective packaging. The processed squid product showed favorable sensory characteristics (appearance, odor, color, flavor, and texture) and physicochemical properties including maintained pH level (pH > 6.4), low microbial activity (4.74 ± 4.27 log CFU/g), low VBN level (18.27 ± 0.52 mg%), and good texture profile during storage for 10 days at 10°C. Results were significant at the significance level of p<0.05. Findings of this study suggest that the superheated steam-roasting treatment was the best method to maintain nutritional value of the common squid. It also showed favorable sensory and physicochemical properties, while smoking treatment prolonged the shelf life through enhancing antioxidant and antimicrobial activities and enriched flavor of the squid product.

scholarly journals OXIDIZED MAIZE STARCH: CHARACTERIZATION AND EFFECT OF IT ON THE BIODEGRADABLE FILMS I. CHARACTERIZATION OF MAIZE STARCH OXIDIZED BY SODIUM HYPOCHLORITE

2016 ◽  
Vol 54 (3) ◽  
pp. 347 ◽  
Author(s):  
Dao Phi Hung ◽  
Truong Thi Nam ◽  
Mac Van Phuc ◽  
Nguyen Anh Hiep ◽  
Nguyen THien Vuong ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Gelatinization Temperature ◽  
Biodegradable Films ◽  
Maize Starch ◽  
Oxidation Degree ◽  
Sem Images ◽  
Carboxyl Content ◽  
Native Starch ◽  
Significant Difference

The effects of hypochlorite level, i.e. 0.5; 1 and 2 active chlorine g/100g starch, on the structures and physicochemical properties of oxidized maize starch were investigated. The obtained results shown that oxidation degree grew up with increasing hypochlorite concentration, specially, the carboxyl content saw higher increased than the content of carbonyl. SEM images indicated that surface of oxidized maize starches were rougher than native starch. The surface of oxidized starches saw rougher with increasing hypochlorite level. However, the DSC results illustrated that there was no significant difference of gelatinization temperature between the native starch and oxidized starches.

scholarly journals Physicochemical properties and shelf-life of low-fat pork sausages wrapped with active film manufactured by sodium alginate and cherry tomato powder

2020 ◽  
Vol 33 (9) ◽  
pp. 1470-1476
Author(s):  
Zhuang Zhuang Qiu ◽  
Koo Bok Chin
Keyword(s):  
Physicochemical Properties ◽  
Shelf Life ◽  
Sodium Alginate ◽  
Profile Analysis ◽  
Thiobarbituric Acid ◽  
Antimicrobial Activities ◽  
Proximate Analysis ◽  
Cherry Tomato ◽  
Low Fat ◽  
Tomato Powder

Objective: This study was carried out to investigate physicochemical properties, and antioxidant and antimicrobial activities of low-fat sausages (LFSs) covered with sodium alginate (SA) film alone and with powder film (TSA-film) formed by cross-linking cherry tomato powder (CTP) and SA with calcium chloride (CaCl2).Methods: Sausages covered with the biodegradable film were assessed based on the measurement of pH, color (L*, a*, b*), proximate analysis, expressive moisture (EM), texture profile analysis, total plate counts (TPC), violet red bile, and 2-Thiobarbituric acid reactive substances (TBARS) during storage under refrigeration. LFSs wrapped with TSA-film were compared with those wrapped with SA-film and without film (control) during storage at 10°C for 35 days.Results: The LFSs covered with the mixed film had lower pH, lightness (L*), EM%, TBARS, and TPC, but lower yellowness (b*) and hardness values than those wrapped with TSA-film alone.Conclusion: Lipid oxidation and microbial growth was retarded in sausages covered with biodegradable films, especially multiple films as compared to single film, thereby resulting in extended shelf-life of the LFSs.

scholarly journals Effect of the concentration of starch and clove essential oil on the physicochemical properties of biodegradable films

2020 ◽  
Vol 19 (3) ◽  
pp. 1315-1326
Author(s):  
O.I. Buso-Ríos ◽  
◽  
G. Velázquez ◽  
L. Járquin-Enríquez ◽  
N.L. Flores-Marínez
Keyword(s):  
Essential Oil ◽  
Physicochemical Properties ◽  
Biodegradable Films ◽  
Clove Essential Oil

scholarly journals Characterization of Ecklonia cava Alginate Films Containing Cinnamon Essential Oils

2018 ◽  
Vol 19 (11) ◽  
pp. 3545 ◽  
Author(s):  
Su-Kyoung Baek ◽  
Sujin Kim ◽  
Kyung Song
Keyword(s):  
Essential Oils ◽  
Base Material ◽  
Antimicrobial Activities ◽  
Ecklonia Cava ◽  
Escherichia Coli O157 ◽  
Biodegradable Films ◽  
Elongation At Break ◽  
Leaf Oil ◽  
Cinnamon Leaf Oil

In this study, Ecklonia cava alginate (ECA) was used as a base material for biodegradable films. Calcium chloride (CaCl2) was used as a cross-linking agent, and various concentrations (0%, 0.4%, 0.7%, and 1.0%) of cinnamon leaf oil (CLO) or cinnamon bark oil (CBO) were incorporated to prepare active films. The ECA film containing 3% CaCl2 had a tensile strength (TS) of 17.82 MPa and an elongation at break (E) of 10.36%, which were higher than those of the film without CaCl2. As the content of essential oils (EOs) increased, TS decreased and E increased. Addition of CLO or CBO also provided antioxidant and antimicrobial activities to the ECA films. The antioxidant activity of the ECA film with CBO was higher than that of the film containing CLO. In particular, the scavenging activities of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radicals in the ECA film containing 1% CBO were 50.45% and 99.37%, respectively. In contrast, the antimicrobial activities against Escherichia coli O157:H7, Salmonella Typhimurium, Staphylococcus aureus, and Listeria monocytogenes were superior in the ECA films with CLO. These results suggest that ECA films containing CLO or CBO can be applied as new active packaging materials.

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