Milks pigmentation with astaxanthin and determination of colour stability during short period cold storage

Nowadays, there is a growing interest in finding new coloring molecules of natural origin that can increase and diversify the offer of natural food dyes already present in the market. In the present work, a B-phycoerythrin extract from the microalgae Porphyridium cruentum was tested as a food colorant in milk-based products. Using spectroscopy and colorimetry, the extract was characterized and gave evidence of good properties and good stability in the pH range between 4.0 and 9.0. Coloring studies were conducted to demonstrate that samples carrying the pink extract could be used for simulating the pink color of marketed milk-based products. The staining factors, representing the amount of pink protein to be added to reproduce the color of strawberry commercial products, ranged between 1.6 mg/L and 49.5 mg/L, being sufficiently low in all samples. Additionally, color stability during a short period of cold storage was studied: it demonstrated that the three tested types of dairy products remained stable throughout the 11-day analysis period with no significant changes. These results prove the potential of the B-phycoerythrin extract as a natural colorant and alternative ingredient to synthetic coloring molecules.

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Cultivar differences in the influence of a short period of cold storage on ethylene biosynthesis in apples

Postharvest Biology and Technology ◽

10.1016/s0925-5214(97)87274-2 ◽

1997 ◽

Vol 10 (1) ◽

pp. 21-27 ◽

Cited By ~ 29

Author(s):

C. Larrigaudiere ◽

J. Graell ◽

J. Salas ◽

M. Vendrell

Keyword(s):

Cold Storage ◽

Ethylene Biosynthesis ◽

Cultivar Differences ◽

Short Period

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Ethylene and Lipoxygenase In Relation to Afterripening of Dormant NC-13 Peanut Seeds1,2

Peanut Science ◽

10.3146/pnut.12.1.0011 ◽

1985 ◽

Vol 12 (1) ◽

pp. 45-49 ◽

Cited By ~ 2

Author(s):

D. L. Ketring ◽

H. E. Pattee

Keyword(s):

Heat Treatment ◽

Cold Storage ◽

Ethylene Production ◽

Sharp Increase ◽

Gradual Increase ◽

The Other ◽

Immature Seeds ◽

Positive Correlations ◽

Mature Seeds

Abstract Following harvest, peanuts are usually subjected to a period of storage. During storage biochemical changes are known to occur. The objectives of this study were to determine the changes and relationship in ethylene production, germination, and lipoxygenase (LG) activity during cold storage of dormant NC-13 peanut seeds. Two seed lots (SL) were used: one grown in Oklahoma (SL80) and the other grown in N. Carolina (SL81). SL80 and SL81 were stored at 2 to 5 C for 193 and 242 days, respectively. Samples were taken at about 28-day intervals for determination of germination, ethylene production, and LG activity. Seeds of two and three maturities were tested for SL80 and SL81, respectively. As afterripening of stored seeds proceeded, ethylene production gradually increased, with the maximum at 48 hours of germination. Germination showed a concomitant gradual increase. Lipoxygenase activity of both seedlots was less for mature than for immature seeds and showed a sharp increase during storage at 2 to 5 C, particularly for immature seeds. After heat-treatment to break dormancy of sublots from SL81, there was a progessive increase in ethylene production and germination, but most notably for mature seeds. In contrast to ethylene production and germination, after heat-treatment LG activity declined. Linear correlation coefficient (r) values between ethylene production and germination were highly significant for mature seeds from SL80 at 48 and 72 hours of germination, but only at 72 hours for immature seeds. For SL81 as for SL80, significant positive correlations were found between ethylene production and germination. However, correlations between LG activity and the other variables were not significant except for mature seeds from SL81. Significant positive correlations for both ethylene production and germination with LG activity also existed for these seeds. But after heat-treatment these correlations no longer occurred. The data indicate that the metabolic processes related to ethylene production and germination are occurring simultaneously with those of LG activity. The possibility that metabolites from LG activity serve as substrates for ethylene production can not be precluded.

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Determination of presence and quantification of cadmium, lead and copper in Nile tilapia (Oreochromis niloticus) fillets obtained from three cold storage plants in the state of Parana, Brazil

Food Science and Technology ◽

10.1590/s0101-20612011000200013 ◽

2011 ◽

Vol 31 (2) ◽

pp. 361-365 ◽

Cited By ~ 2

Author(s):

Alexandre Nobuhiro Tajiri ◽

Daisy Pontes Netto ◽

Márcia Sassahara ◽

Mari Sylmara Martins Rodrigues ◽

Cristina Arduini Cavalcanti de Arruda

Keyword(s):

Cold Storage ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

The State ◽

Nile Tilapia Oreochromis Niloticus ◽

Cadmium Lead

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Determination of GTN Model Parameters Based on Artificial Neutral Network for a Ductile Failure

Journal of Mechanical, Civil and Industrial Engineering ◽

10.32996/jmcie.2021.2.1.1 ◽

2021 ◽

Vol 2 (1) ◽

pp. 01-05

Author(s):

YASSINE CHAHBOUB ◽

SZAVAI Szabolcs

Keyword(s):

Ductile Failure ◽

Compact Tension ◽

Model Parameters ◽

Single Edge ◽

Direct Identification ◽

Simulation Data ◽

Short Period ◽

Artificial Neural Network Ann ◽

Excellent Tool

The Gurson – Tvergaard – Needleman (GTN) mechanical model is widely used to predict the failure of materials based on laboratory specimens, direct identification of Gurson – Tvergaard – Needleman parameters is not easy and time-consuming, and the most used method to determine them is the combination between the experimental results and those of the finite elements, the process consists of repeating the simulations several times until the simulation data matches the experimental data obtained at the specimen level.This article aims to find GTN parameters for the Compact Tension (CT) and Single Edge Tensile Test (SENT) specimen based on the Notch Specimen (NT) using the Artificial Neural Network (ANN) approach. . This work presents how the ANN could help us determine the parameters of GTN in a very short period of time. The results obtained show that ANN is an excellent tool for determining GTN parameters.

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Determination of source parameters of small earthquakes from P-wave rise time

Bulletin of the Seismological Society of America ◽

10.1785/bssa0630020599 ◽

1973 ◽

Vol 63 (2) ◽

pp. 599-614 ◽

Cited By ~ 4

Author(s):

M. E. O'Neill ◽

J. H. Healy

Keyword(s):

Rise Time ◽

Source Parameters ◽

P Wave ◽

Simple Method ◽

Zero Crossing ◽

Basic Measurement ◽

Earthquake Source Parameters ◽

Short Period ◽

Stress Drops

abstract A simple method of estimating source dimensions and stress drops of small earthquakes is presented. The basic measurement is the time from the first break to the first zero crossing on short-period seismograms. Graphs relating these measurements to rise time as a function of Q and instrument response permit an estimate of earthquake source parameters without the calculation of spectra. Tests on data from Rangely, Colorado, and Hollister, California, indicate that the method gives reasonable results.

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Dye adsorption revisited: Application of the cationic dye adsorption method for the quantitative determination of the acidic surface groups of nanocellulose materials

10.21203/rs.3.rs-234234/v1 ◽

2021 ◽

Author(s):

Jun Araki

Keyword(s):

Dye Adsorption ◽

Carboxyl Groups ◽

Cationic Dye ◽

Cellulose Nanowhiskers ◽

Adsorption Method ◽

Short Period ◽

Light Absorbance ◽

Mercapto Groups ◽

Rapid Treatment

Abstract The surface carboxyl and sulfate groups on cellulose nanowhiskers were quantified via the adsorption of toluidine blue O (TBO), a cationic dye. Here, simple and rapid protocols, such as mixing the nanowhisker suspensions with a dye solution, separating the supernatants via centrifugation, and determining the excess dye concentration via visible light absorbance techniques, were used to obtain reproducible results comparable with those obtained via titration. In addition to facilitating the discrete quantification of the sulfate and carboxyl groups, the TBO adsorption method enabled carboxyl quantification in the presence of mercapto groups, which was difficult to achieve via titration. The adsorption of TBO onto the carboxyl groups was completed within 30 min, enabling the rapid treatment of many samples within a short period.

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Analysis of Thermal Energy Distribution from Low Yield Nuclear Explosions

Modern Applied Science ◽

10.5539/mas.v11n8p1 ◽

2017 ◽

Vol 11 (8) ◽

pp. 1

Author(s):

Jinan Abdil-Hasan

Keyword(s):

Energy Distribution ◽

Thermal Energy ◽

Nuclear Explosion ◽

Thermal Exposure ◽

Nuclear Explosions ◽

Short Period ◽

Different Types ◽

Transmittance Factor ◽

Explosion Center

This study is dedicated for the determination of the distribution of thermal energy resulted from different types of a 50-70 KT yield nuclear explosion; surface, aerial, in different locations away from the explosion center and considering the differences in the transmittance factor and visibility conditions that may affect the distribution of thermal energy. The results showed that the majority of released thermal energy occurs during a very short period of time after explosion, and reaches its maximum of 22 KT after about 3.1 sec. Also, it was determined the absence of significant effect for the visibility degree on the value of the total thermal exposure for both types of explosions, and that the thermal exposure due to the surface explosion is about 60% of its value in case of the aerial explosion.

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