scholarly journals Effects of Poloxamer Content and Storage Time of Biodegradable Starch-Chitosan Films on Its Thermal, Structural, Mechanical, and Morphological Properties

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2341
Author(s):  
Abril Fonseca-García ◽  
Carolina Caicedo ◽  
Enrique Javier Jiménez-Regalado ◽  
Graciela Morales ◽  
Rocio Yaneli Aguirre-Loredo
Keyword(s):  
Physicochemical Properties ◽  
Storage Time ◽  
Color Change ◽  
Pluronic F127 ◽  
Morphological Properties ◽  
Composite Polymer ◽  
Ambient Conditions ◽  
Composite Polymer Material ◽  
And Storage ◽  
Blend Polymer

Biodegradable packaging prepared from starch is an alternative to fossil-based plastic packaging. However, the properties of starch packaging do not comply with the necessary physicochemical properties to preserve food. Hence, in a previous study, we reported the preparation of a composite polymer material based on starch-chitosan-pluronic F127 that was found to be an adequate alternative packaging material. In this study, we modified the physicochemical properties of this material by storing it for 16 months under ambient conditions. The results indicate that the incorporation of pluronic F127 in the blend polymer can help avoid the retrogradation of starch. Moreover, at higher concentrations of pluronic F127, wettability is reduced. Finally, after storage, the materials exhibited surface modification, which is related to a color change and an increase in solubility, as well as a slight increase in stiffness.

scholarly journals Influence of the extraction method and storage time on the physicochemical properties and carotenoid levels of pequi (Caryocar brasiliense Camb.) oil

2012 ◽  
Vol 32 (2) ◽  
pp. 386-392 ◽  
Author(s):  
Milton Cosme Ribeiro ◽  
Eduardo Valério de Barros Vilas Boas ◽  
Tania Regina Riul ◽  
Lílian Pantoja ◽  
Helyde Albuquerque Marinho ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Storage Time ◽  
Extraction Methods ◽  
Hot Water ◽  
Ambient Conditions ◽  
Total Carotenoids ◽  
Peroxide Values ◽  
Mechanical Extraction ◽  
And Storage

The objective of this study was to analyze the physicochemical properties and carotenoid levels of pequi oil obtained by different extraction methods and to evaluate the preservation of these properties and pigments during storage time. The pequi oil was obtained by solvent extraction, mechanical extraction, and hot water flotation. It was stored for over 180 days in an amber bottle at ambient conditions. Analyses for the determination of the acidity, peroxide, saponification and iodine values, coloration, total carotenoids, and β-carotene levels were conducted. The oil extraction with solvents produced the best yield and carotenoid levels. The oil obtained by mechanical extraction presented higher acidity (5.44 mg KOH.g-1) and peroxide values (1.07 mEq.kg-1). During the storage of pequi oil, there was an increase in the acidity and the peroxide values, darkening of the oil coloration, and a reduction of the carotenoid levels. Mechanical extraction is the less advantageous method for the conservation of the physicochemical properties and carotenoid levels in pequi oil.

scholarly journals Effect of Packaging Material, Storage Temperature and Duration on the Quality of Semi-Processed Adult House Cricket Meal

2017 ◽  
Vol 7 (1) ◽  
pp. 21 ◽  
Author(s):  
Edwin Kamau ◽  
Christopher Mutungi ◽  
John Kinyuru ◽  
Samuel Imathiu ◽  
C. Tanga ◽  
...  
Keyword(s):  
Storage Time ◽  
Storage Temperature ◽  
Color Change ◽  
Viable Count ◽  
Ambient Conditions ◽  
House Cricket ◽  
Product Quality And Safety ◽  
Conventional Foods ◽  
Penicillium Spp

Edible insects are widely consumed in different parts of the world and can serve as an alternative nutritional source to conventional foods. Nonetheless, little attention has been given to their quality and shelf life in different packages when exposed to different storage environments. In this study, the effect of storage temperature, duration and type of packaging on the storage stability of the adult house cricket meal was examined. The samples were boiled, solar dried, milled and packaged into polypropylene (PP), plastic (PL) and polyethylene (PL) packages. The samples were then stored for six months in refrigerated and ambient conditions where by changes in physical and biochemical attributes were monitored. Iodine values significantly decreased in all the packages while peroxide, p-anisidine and saponification values significantly increased. SFA, MUFA and PUFA contents reduced during storage although a higher tendency for MUFA and PUFA values was observed in the refrigerated samples. Total viable count (TVC) and yeast and molds counts significantly increased in storage. Three types of fungi; Aspergillus spp., Alternaria spp. and Penicillium spp. were isolated in all the packages. Overall color change steadily decreased with increase in storage time. Deterioration was higher in samples stored in ambient conditions than in refrigeration. The degree of deterioration in the two storage environments among the different packages was in the order; PP>PE>PL. Although the PL package outperformed the other packages it is recommended to carry out sensory analysis and avoid post-processing contamination that can adversely affect the product quality and safety during storage. 

scholarly journals The Effects of Pasteurization Conditions and Storage Time on Microbial Safety, Quality and Antioxidant Properties of Cider from Rose Apple (Syzygium agueum Alston cv. Taaptimjan)

2021 ◽  
Vol 20 (2) ◽  
Author(s):  
Chukwan Techakanon ◽  
Karthikeyan Venkatachalam
Keyword(s):  
Storage Time ◽  
Antioxidant Properties ◽  
Control Sample ◽  
Titratable Acidity ◽  
Sensory Profile ◽  
Soluble Solids ◽  
Ambient Conditions ◽  
Apple Cider ◽  
And Storage

The aims of this study were to produce rose apple cider and to compare the quality of cider following different pasteurization conditions. Rose apple (Syzygium agueum Alston cv. Taaptimjan), which is rich in bioactive compounds, was used to produce cider. Cider pasteurization was carried out at 63 ºC for 15 s, or at 71 ºC for 6 s after fermentation. Cider from each pasteurization condition was stored at room temperature (27±1 ºC). Physicochemical, microbial and sensory properties were monitored for three months in the study. The obtained cider (when not pasteurized) had initially 6% alcohol, with soluble solids in the range 4.2-4.3 ºBrix, pH 4.6, and 4.2 g/L titratable acidity. Pasteurization was effective in prolonging shelf life of the cider from 6 to 12 weeks; however, the treatment significantly decreased contents of vitamin C and antioxidants. In the sensory profile of cider pasteurized at 71 ºC, trained panelists perceived it as more sweet, less sour, with less flavor and same intensity of aftertaste, when compared to the control sample. The pasteurization conditions 71 ºC for 6 s gave desirable sensory quality and met microbiology standards for up to three months of storage in ambient conditions.

Microstructure and physicochemical properties: Effect of pre-chilling and storage time on the quality of Channel catfish during frozen storage

LWT ◽  
2020 ◽  
Vol 130 ◽  
pp. 109606
Author(s):  
Liu Shi ◽  
Tao Yin ◽  
Guangquan Xiong ◽  
Anzi Ding ◽  
Xin Li ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Channel Catfish ◽  
Storage Time ◽  
Frozen Storage ◽  
And Storage

scholarly journals Research and implementation of innovative technologies for the use of composite polymer materials to protect the root systems of seedlings from desiccation and increase their establishment

2021 ◽  
Vol 36 ◽  
pp. 04006
Author(s):  
V.V. Kopytkov ◽  
Ch. Dorzhsuren ◽  
Yu.A. Tairbergenov
Keyword(s):  
Physicochemical Properties ◽  
Polymer Material ◽  
Sodium Salt ◽  
Active Substance ◽  
Relative Viscosity ◽  
Mechanical Damage ◽  
Root Systems ◽  
Polymer Materials ◽  
Composite Polymer ◽  
Composite Polymer Material

In the presented materials, the physicochemical properties of composite polymer materials for protecting the root systems of forest seedlings from desiccation are studied. The conducted studies on the production of composite polymer materials allowed to establish their optimal ratios: the sodium salt carboxymethyl cellulose from 4 active substance wt.%, as target additives contains potassium chloride from 6.0 to 9.0 wt.% and ammonium nitrate from 0.004 to 0.006 wt.%. This ratio of target additives corresponds to the optimal relative viscosity of the composite polymer material equal to 170-175 s. Treatment of the root systems of seedlings with a composite polymer material allows not only to prevent desiccation, increase their establishment on the planting area, but also to reduce mechanical damage during transportation and forest planting.

scholarly journals Impact of storage conditions and storage time on silver nanoparticles' physicochemical properties and implications for their biological effects

RSC Advances ◽  
2015 ◽  
Vol 5 (102) ◽  
pp. 84172-84185 ◽  
Author(s):  
E. Izak-Nau ◽  
A. Huk ◽  
B. Reidy ◽  
H. Uggerud ◽  
M. Vadset ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Physicochemical Properties ◽  
Storage Time ◽  
Biological Effects ◽  
Storage Conditions ◽  
Capping Agent ◽  
The Stability ◽  
The Impact ◽  
And Storage

A multi-parametric assessment of the impact of storage time/conditions and capping agent charge on the stability and toxicity of AgNPs showed agglomeration, dissolution, oxidation, capping agent degradation and attachment of Ag+ ions all play a role.

Effect of storage time on the microbial and physicochemical properties of gamma irradiated turmeric powder under various atmospheres of packaging

2021 ◽  
pp. 109580
Author(s):  
Saeideh Esmaeili ◽  
Samira Berengi-Ardestani ◽  
Elham Khanniri ◽  
Mohsen Barzegar ◽  
Mohammad Ali Sahari
Keyword(s):  
Physicochemical Properties ◽  
Storage Time ◽  
Gamma Irradiated
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