scholarly journals Phytochemical composition and antioxidant activity of peach as affected by pasteurization and storage duration

LWT ◽  
2012 ◽  
Vol 49 (2) ◽  
pp. 202-207 ◽  
Author(s):  
Ana Oliveira ◽  
Manuela Pintado ◽  
Domingos P.F. Almeida
Keyword(s):  
Antioxidant Activity ◽  
Storage Duration ◽  
Phytochemical Composition ◽  
And Storage

scholarly journals STABILITAS ANTOSIANIN DAN AKTIVITAS ANTIOKSIDAN TEPUNG BERAS HITAM BERDASARKAN JENIS KEMASAN DAN LAMA PENYIMPANAN

2019 ◽  
Vol 9 (2) ◽  
pp. 27
Author(s):  
Nur Latifa ◽  
Nurhidajah Nurhidajah ◽  
Muh Yusuf
Keyword(s):  
Antioxidant Activity ◽  
Moisture Content ◽  
Shelf Life ◽  
Rice Flour ◽  
Anthocyanin Content ◽  
Black Rice ◽  
Storage Duration ◽  
Randomized Design ◽  
Factor Type ◽  
And Storage

Black rice flour during storage has the disadvantage of reducing the antioxidant content and antioxidants present in black rice flour due to improper packaging for storage so that the pH increases, the color will disappear so that the anthocyanin content will also decrease during storage. This study aims to determine the influence of packaging type and storage time to levels of anthocyanins, antioxidant activity, moisture content, and color of black rice flour. This research uses a factorial completely randomized design consisting of 2 factors: first factor type of packaging (PP and Alufo) with each thickness of 0.5 mm and second factor storage duration (0 days, 14 days, 28 days, 42 days, and 56 days) in room temperature. The results of statistical test showed that the type of packaging and storage duration influenced the anthocyanin content, antioxidant activity, moisture content, and color. Antosianin content of black rice flour at the end of shelf life on PP packaging of 5.39 ppm sample and Alufo 14.14 ppm sample. Antioxidant activity at end of shelf life in packing of PP equal to 18,6% and Alufo 24,48%. Water content at end of shelf life on packing PP 2,34% and Alufo 2,65%. The color is at the end of shelf life on the packaging of PP 8,351 and Alufo 7,568.

scholarly journals Effect of particle size on phytochemical composition and antioxidant properties of Sargassum cristaefolium ethanol extract

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. S. Prasedya ◽  
A. Frediansyah ◽  
N. W. R. Martyasari ◽  
B. K. Ilhami ◽  
A. S. Abidin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Ethanol Extract ◽  
Total Phenolic ◽  
Particle Sizes ◽  
Epicatechin Gallate ◽  
Particle Size Reduction ◽  
Phytochemical Composition

AbstractSample particle size is an important parameter in the solid–liquid extraction system of natural products for obtaining their bioactive compounds. This study evaluates the effect of sample particle size on the phytochemical composition and antioxidant activity of brown macroalgae Sargassum cristaefolium. The crude ethanol extract was extracted from dried powders of S.cristeafolium with various particle sizes (> 4000 µm, > 250 µm, > 125 µm, > 45 µm, and < 45 µm). The ethanolic extracts of S.cristaefolium were analysed for Total Phenolic Content (TPC), Total Flavonoid Content (TFC), phenolic compound concentration and antioxidant activities. The extract yield and phytochemical composition were more abundant in smaller particle sizes. Furthermore, the TPC (14.19 ± 2.08 mg GAE/g extract to 43.27 ± 2.56 mg GAE/g extract) and TFC (9.6 ± 1.8 mg QE/g extract to 70.27 ± 3.59 mg QE/g extract) values also significantly increased as particle sizes decreased. In addition, phenolic compounds epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC), and Epigallocatechin gallate (EGCG) concentration were frequently increased in samples of smaller particle sizes based on two-way ANOVA and Tukey’s multiple comparison analysis. These results correlate with the significantly stronger antioxidant activity in samples with smaller particle sizes. The smallest particle size (< 45 µm) demonstrated the strongest antioxidant activity based on DPPH, ABTS, hydroxyl assay and FRAP. In addition, ramp function graph evaluates the desired particle size for maximum phytochemical composition and antioxidant activity is 44 µm. In conclusion, current results show the importance of particle size reduction of macroalgae samples to increase the effectivity of its biological activity.

scholarly journals Quality of Watermelon Juice Concentrated by Forward Osmosis and Conventional Processes

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1568
Author(s):  
Rebecca R. Milczarek ◽  
Carl W. Olsen ◽  
Ivana Sedej
Keyword(s):  
Antioxidant Activity ◽  
Large Scale ◽  
Citrullus Lanatus ◽  
Forward Osmosis ◽  
Soluble Phenolics ◽  
Nutritional Components ◽  
Watermelon Juice ◽  
Juice Concentrate ◽  
And Storage

Watermelon (Citrullus lanatus) juice is known for its refreshing flavor, but its high perishability limits its availability throughout the year. Watermelon juice concentrate has extended shelf-life and lower transportation and storage costs, but the conventional thermal evaporation process for concentrating juice degrades the nutritional components and sensory quality of the product. Thus, in this work, a large-scale, non-thermal forward osmosis (FO) process was used to concentrate fresh watermelon juice up to 65°Brix. The FO concentrate was compared to thermal concentrate and fresh juices, and to commercially available refrigerated watermelon juices, in terms of lycopene and citrulline content, total soluble phenolics, antioxidant activity, and sensory properties. The FO concentrate had statistically similar (p < 0.05) levels of all the nutrients of interest except antioxidant activity, when compared to the thermal concentrate. The reconstituted FO concentrate maintained the same antioxidant activity as the raw source juice, which was 45% higher than that of the reconstituted thermal concentrate. Sensory results showed that reconstituted FO concentrate resulted in highly liked juice, and it outperformed the reconstituted thermal concentrate in the sensory hedonic rating. This work demonstrates the possibility to produce a high-quality watermelon juice concentrate by forward osmosis.

scholarly journals Effect of manufacturing temperature and storage duration on stability of chemically defined media measured with LC-MS/MS

2018 ◽  
Vol 94 (4) ◽  
pp. 1144-1155 ◽  
Author(s):  
Florian Krattenmacher ◽  
Tamara Heermann ◽  
Amandine Calvet ◽  
Bartlomiej Krawczyk ◽  
Thomas Noll
Keyword(s):  
Storage Duration ◽  
Chemically Defined Media ◽  
Defined Media ◽  
And Storage

scholarly journals Association Between Weather Variables, Airborne Inoculum Concentration, and Raspberry Fruit Rot Caused by Botrytis cinerea

2018 ◽  
Vol 108 (1) ◽  
pp. 70-82 ◽  
Author(s):  
Odile Carisse ◽  
Vanessa McNealis ◽  
Alissa Kriss
Keyword(s):  
Meteorological Data ◽  
Fruit Rot ◽  
Weather Variables ◽  
Storage Duration ◽  
Inoculum Concentration ◽  
Crop Losses ◽  
Airborne Inoculum ◽  
Average Relative Humidity ◽  
And Storage ◽  
Field Plots

Botrytis fruit rot (BFR), one of the most important diseases of raspberry (Rubus spp.), is controlled primarily with fungicides. Despite the use of fungicides, crop losses due to BFR are high in most years. The aim of this study was to investigate the association between airborne inoculum, weather variables, and BFR in order to improve the management of the disease as well as harvest and storage decisions. Crop losses, measured as the percentage of diseased berries during the harvest period, were monitored in unsprayed field plots at four sites in three successive years, together with meteorological data and the number of conidia in the air. Based on windowpane analysis, there was no evidence of correlation between crop losses and temperature, vapor pressure deficit, wind, solar radiation, or probability of infection. There were significant correlations between crop losses and airborne inoculum and between crop losses and humidity-related variables, and the best window length was identified as 7 days. Using 7-day average airborne inoculum concentration combined with 7-day average relative humidity for periods ending 6 to 8 days before bloom, it was possible to accurately predict crop losses (R2 of 0.86 to 0.89). These models could be used to assist with managing BFR, timing harvests, and optimizing storage duration in raspberry crops.

Sign in / Sign up

Export Citation Format

Share Document