scholarly journals Effect of Biostimulants and Storage on Discoloration Potential of Carrot

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1894
Author(s):  
Małgorzata Szczepanek ◽  
Jarosław Pobereżny ◽  
Elżbieta Wszelaczyńska ◽  
Katarzyna Gościnna
Keyword(s):  
Antioxidant Capacity ◽  
Chlorogenic Acid ◽  
Storage Period ◽  
Oxidation Potential ◽  
Antioxidant Compounds ◽  
Single Application ◽  
Oxidative Potential ◽  
Long Term Storage ◽  
Term Storage

The application of biostimulants to prevent stress-related losses and increase productivity is becoming an increasingly common practice. A study was carried out to determine the effect of the type and methods of biostimulant application and long-term storage on the content of antioxidant compounds determining the processes of the enzymatic browning of carrot roots. The natural seaweed biostimulant Kelpak and synthetic Asahi were applied as part of the study. A quality assessment of carrot roots was carried out directly after harvest and after six months of storage in air at a temperature of 1 °C and a relative humidity of 95%. A single application of Kelpak seaweed extract in the four-leaf phase (2 or 3 dm3 ha−1) proved to be the most effective for reducing oxidative darkening processes (by 33.5%). The oxidative potential was most strongly dependent on the anthocyanin (r = −0.477) and chlorogenic acid (r = −0.474) contents. The concentration of polyphenols (r = 0.836; r = 0.719) and flavonoids (r = 0.671; r = 0.729) had the greatest effect on the antioxidant capacity (FRAP and ABTS respectively). It was observed that pectin, polyphenol, chlorogenic acid, flavonoid and anthocyanin concentrations tended to increase after a single application of Kelpak in a dose of 2 dm3 ha−1. A long-term storage period had a stronger effect on the increase in the oxidation potential than on the antioxidant capacity FRAP value.

scholarly journals Chlorogenic acid content in potato tubers with colored flesh as affected by a genotype, location and long-term storage

2019 ◽  
Vol 65 (No. 7) ◽  
pp. 355-360
Author(s):  
Matyáš Orsák ◽  
Karel Hamouz ◽  
Jaromír Lachman ◽  
Pavel Kasal
Keyword(s):  
Chlorogenic Acid ◽  
Acid Content ◽  
Field Experiments ◽  
The Other ◽  
Potato Tubers ◽  
Flesh Color ◽  
Long Term Storage ◽  
And Storage ◽  
Term Storage

In three-year field experiments, the effect of genotype, flesh color, site conditions and storage on chlorogenic acid content (CAC) in tubers of potato cultivars with purple or red flesh was compared to yellow-fleshed cv. Agria. The results confirmed the significant effect of genotype on CAC. The highest CAC was characteristic on a three-year mean for the purple-fleshed cv. Vitelotte (769.5 mg/kg fresh weight (FW)), i.e. 1.19−2.6 times higher than in the other cultivars. In regard to the effect of flesh color, significantly higher mean CAC levels have been shown for the red-fleshed (2.8 times) and purple-fleshed (3.16 times) cultivars in comparison with cv. Agria (148 mg/kg FW). At the Uhříněves location with a warmer climate and frequent dry periods as compared to the second Valečov location, a higher CAC (1.18 times) was found. Cold storage (4°C, 6 months) resulted in a significant CAC increase varying from 33.2% in the Blaue St. Galler cultivar to 210.6% in the Vitelotte cultivar among all eight evaluated color-fleshed cultivars. On the other hand, the effect of storage on CAC was not evident in the yellow-fleshed Agria cultivar (inconclusive difference against CAC after harvest).

Effect of long‐term storage on phenolic composition, antioxidant capacity, and protein profiles of Calicotome villosa subsp. intermedia seeds

2019 ◽  
Vol 44 (1) ◽  
Author(s):  
Fayçal Boughalleb ◽  
Maher Mahmoudi ◽  
Raoudha Abdellaoui ◽  
Boutheina Yahia ◽  
Slah Zaidi ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Protein Profiles ◽  
Phenolic Composition ◽  
Long Term Storage ◽  
Term Storage

scholarly journals The Influence of 1-Methylcyclopropene on `Cortland' and `McIntosh' Apple Quality Following Long-term Storage

HortScience ◽  
2004 ◽  
Vol 39 (5) ◽  
pp. 1062-1065 ◽  
Author(s):  
John M. DeLong ◽  
Robert K. Prange ◽  
Peter A. Harrison
Keyword(s):  
Shelf Life ◽  
Storage Period ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Long Term Storage ◽  
Solids Content ◽  
Apple Quality ◽  
Term Storage

`Redcort Cortland' and `Redmax' and `Summerland McIntosh' apples (Malus ×domestica Borkh.) were treated with 900 nL·L-1 of 1-methylcyclopropene (1-MCP) for 24 hours at 20 °C before storage and were kept at 3 °C in either a controlled atmosphere (CA) of 2 kPa O2 and <2.5 kPa CO2 or in an air (RA) environment for up to 9 months. After 4.5 months, half of the fruit were treated with a second 900 nL·L-1 1-MCP application in air at 3 °C for 24 hours and then returned to RA or CA storage. At harvest and following removal at 3, 6, and 9 months and a 7-day shelf life at 20 °C, fruit firmness, titratable acidity (TA) and soluble solids content (SSC) were measured, while internal ethylene concentrations (IEC) in the apple core were quantified after 1 day at 20 °C. Upon storage removal and following a 21-day shelf life at 20 °C, disorder incidence was evaluated. 1-MCP-treated apples, particularly those held in CA-storage, were more firm and had lower IEC than untreated fruit. Higher TA levels were maintained with 1-MCP in all three strains from both storages, while SSC was not affected. Following the 6- and/or 9-month removals, 1-MCP suppressed superficial scald development in all strains and reduced core browning and senescent breakdown in RA-stored `Redmax' and `Summerland' and senescent breakdown in RA-stored `Redcort'. 1-MCP generally maintained the quality of `Cortland' and `McIntosh' fruit held in CA and RA environments (particularly the former) to a higher degree than untreated apples over the 9-month storage period. A second midstorage application of 1-MCP at 3 °C did not improve poststorage fruit quality above a single, prestorage treatment.

scholarly journals Scientific significance of using protective devices in pear storage in refrigerated warehouses (in the case of Uzbekistan)

2021 ◽  
Vol 939 (1) ◽  
pp. 012039
Author(s):  
A Sh Azizov ◽  
K S Sultonov ◽  
J A Gafurov
Keyword(s):  
Modified Atmosphere Packaging ◽  
Storage Period ◽  
Long Term Storage ◽  
Plastic Bag ◽  
Scientific Significance ◽  
Santa Maria ◽  
Term Storage ◽  
Initial Research ◽  
Main Factor

Abstract In this article, a scientific study on the long-term storage of Santa Maria pears in refrigerated warehouses through using modern protective equipment, special bags and ethylene-absorbing absorbers, was conducted. Accordingly, the main factor influencing the long shelf life of pears was the natural loss during the storage. It was considered that calculation and analysis of effects inducing the natural loss were pivotal to improve the preservation of the fruit, maintain freshness and all useful elements of the fruit, and prolong the storage period. Ethylene absorber and Modified Atmosphere Packaging (MAP) packages were used in the initial research step, and collected pears were placed in the refrigerator at a temperature of 0-2°C in 8 different Options. Results showed that the higher natural loss in the fruit stored without employing any means (in option 1) was 5.45% equal to 193.9 gram, whereas the best result was in Option 7 used the MAP special plastic bag and two pieces of absorbers, and compared to the initial weight, 4099 grams, the natural loss in the fruit was 1.20% equal to 47.7 gram.

scholarly journals Changes of salivary biomarkers under different storage conditions: effects of temperature and length of storage

2018 ◽  
Vol 29 (1) ◽  
pp. 94-111 ◽  
Author(s):  
Tomás Barranco ◽  
Asta Tvarijonaviciute ◽  
Damián Escribano ◽  
Fernando Tecles ◽  
José J Cerón ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Room Temperature ◽  
Storage Conditions ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Long Term Storage ◽  
Reducing Ability ◽  
Trolox Equivalent ◽  
The Stability ◽  
Term Storage

Introduction: In this report, we aimed to examine the stability of various analytes in saliva under different storage conditions. Materials and methods: Alpha-amylase (AMY), cholinesterase (CHE), lipase (Lip), total esterase (TEA), creatine kinase (CK), aspartate aminotransferase (AST), lactate dehydrogenase (LD), lactate (Lact), adenosine deaminase (ADA), Trolox equivalent antioxidant capacity (TEAC), ferric reducing ability (FRAS), cupric reducing antioxidant capacity (CUPRAC), uric acid (UA), catalase (CAT), advanced oxidation protein products (AOPP) and hydrogen peroxide (H2O2) were colorimetrically measured in saliva obtained by passive drool from 12 healthy voluntary donors at baseline and after 3, 6, 24, 72 hours, 7 and 14 days at room temperature (RT) and 4 ºC, and after 14 days, 1, 3 and 6 months at – 20 ºC and – 80 ºC. Results: At RT, changes appeared at 6 hours for TEA and H2O2; 24 hours for Lip, CK, ADA and CUPRAC; and 72 hours for LD, Lact, FRAS, UA and AOPP. At 4 ºC changes were observed after 6 hours for TEA and H2O2; 24 hours for Lip and CUPRAC; 72 hours for CK; and 7 days for LD, FRAS and UA. At – 20 ºC changes appeared after 14 days for AST, Lip, CK and LD; and 3 months for TEA and H2O2. At – 80 ºC observed changes were after 3 months for TEA and H2O2. Conclusions: In short-term storage, the analytes were more stable at 4 ºC than at room temperature, whereas in long-term storage they were more stable at - 80 ºC than at – 20 ºC.

scholarly journals Evaluation of long term storage of apples by means of fractal analysis

2012 ◽  
Vol 49 (No. 4) ◽  
pp. 137-145
Author(s):  
Ľ. Kubík ◽  
A. Pavelková ◽  
T. Hornyák ◽  
P. Kováč ◽  
V. Horčin ◽  
...  
Keyword(s):  
Fractal Dimension ◽  
Fractal Analysis ◽  
Structure Determination ◽  
Storage Period ◽  
Textural Properties ◽  
Long Term Storage ◽  
Structure Degradation ◽  
Term Storage

Realization of long-term apple storage requires the most detailed information about the flesh structure and texture, whose quality is contributing by responsible way to the whole quality of the evaluated fruits. The fractal analysis that the fractal dimension of the flesh structure determination is enabling was used. Structure degradation of four apples variants of the variety Idared was evaluated by fractal dimension during long-term storage in standard conditions. The influence of the storage on the fractal dimension was investigated by means of regression dependencies. The dependences express a decrease of the fractal dimension value in the relation to the increasing storage period. The influence of long term storage and influence of the variants of the fertilization on the fractal dimension was confirmed by means of analysis of variance. Connectivity between fractal dimension and descriptors of quality of the apple flesh structure was determined with utilization of the sensoric analysis. Fractal dimension expresses the structural and textural properties of the apple flesh.

Research on the Effect of Prehydration of Portland Cement Stored in Normal Conditions

2014 ◽  
Vol 670-671 ◽  
pp. 376-381 ◽  
Author(s):  
Aleksey Adamtsevich ◽  
Aleksey Eremin ◽  
Andrey Pustovgar ◽  
Stanislav Pashkevich ◽  
Sergey Nefedov
Keyword(s):  
Portland Cement ◽  
Storage Period ◽  
Heat Evolution ◽  
Long Term Storage ◽  
Moisture Influence ◽  
The Impact ◽  
Activity Decrease ◽  
Kinetics Of ◽  
Term Storage

This article is a stage of the author’s research into the impact of different factors on the hydration of mineral binders. The problem of cement activity decrease due to adsorption moisture influence during long-term storage in normal conditions (20°C and 50% RH) was examined. The influence of storage period in airtight and non-airtight conditions on the kinetics of heat evolution during hydration as well as on phase composition of Portland cement was characterized using experimental methods.

scholarly journals Effect of ageing on magnetic and electrical properties of Ti–substituted La-Sr manganites

2018 ◽  
Vol 185 ◽  
pp. 06002 ◽  
Author(s):  
A. Badelin ◽  
Z. Datskaya ◽  
S. Estemirova ◽  
V. Karpasyuk ◽  
D. Merkulov
Keyword(s):  
Curie Point ◽  
Storage Period ◽  
X Ray Diffraction ◽  
Electrical Parameters ◽  
Long Term Storage ◽  
Ti Content ◽  
Term Storage ◽  
Over Time ◽  
Error Of Measurement

The changes of structural, magnetic and electrical parameters of ceramic La0.8-xSr0.2+xMn1-xTixO3+γ (0.025 ≤ x ≤ 0.150) manganites during long-term storage at room temperature and after thermal cycling were investigated. The unit cell volume (V) of all manganites decreased over time. Most considerable decrease of V and broadening of X-ray diffraction lines width were observed in the samples with high quantity of titanium. During the storage period magnetization (σ) and Curie point (Tc) of manganites with relatively low Ti content decreased, while the compositions with high values of “x” exhibited some trend of σ and Tc increase. The resistance of the samples with x < 0.100 increased over time. Fluctuations of magnetization of all thermal-aged samples were within the error of measurement, and Curie point of manganites with x = 0.150 showed the rise. From the data obtained it might be inferred that ageing phenomena in Ti-substituted manganites can be associated with oxidation processes, the transfer of Ti4+ to vacant sites in rare-earth sublattice and formation of microinhomogeneities.

scholarly journals Germination of Hymenaea courbaril: Storage Behavior, Origin, and Substrate

2020 ◽  
Author(s):  
Leonardo Regnier
Keyword(s):  
Storage Period ◽  
Significant Loss ◽  
Prolonged Storage ◽  
Hymenaea Courbaril ◽  
Long Term Storage ◽  
Germination Potential ◽  
Population Origin ◽  
One Year ◽  
Term Storage

Hymenaea courbaril is an endangered species, promising to reforestation programs and mainly explored as a wood source. The available information concerning long-term storage methods, seed recalcitrance, parental, and substrate influence is scarce. This study focused on the seed behavior according to population origin and during one-year storage, also testing the efficiency of the low-temperature conservation. Variations between the uncertainty indexes were found to the studied populations after long-term storage. There was no significant loss of the germination potential in consequence of the prolonged storage period. Although, older seeds promoted gradually greater delayed germination. Germination speed, synchrony, and uncertainty indexes were substantially different between the -20&deg; conservation and control. H. courbaril seeds are capable of long-term storage without losing their germination potential, indicating an orthodox behavior.

Efficacy of the Antigenicity-Retaining Ability of Fixative Solutions for Liquid-Based Cytology: Immunocytochemistry of Long-Term Storage

2021 ◽  
pp. 1-12
Author(s):  
Hiaki Sato ◽  
Yoshiaki Norimatsu ◽  
Satoshi Irino ◽  
Takeshi Nishikawa
Keyword(s):  
Cell Membrane ◽  
Room Temperature ◽  
Storage Temperature ◽  
Storage Period ◽  
Storage Conditions ◽  
Immunocytochemical Staining ◽  
Long Term Storage ◽  
Liquid Based Cytology ◽  
Term Storage

<b><i>Introduction/Objective:</i></b> Liquid-based cytology (LBC) is advantageous as multiple stained specimens can be prepared and used for additional assays such as immunocytochemical and molecular-pathological investigations. Two types of preservative-fixative solutions (fixatives) are used for nongynecologic specimens used in the BD SurePath-LBC (SP-LBC) method, and their components vary. However, few studies have evaluated the differences in antigen-retaining ability between these fixatives. Therefore, we investigated and compared the antigen-retaining ability of the fixatives in immunocytochemical staining (ICC) under long-term storage conditions. <b><i>Materials and Methods:</i></b> Sediments of cultured RAJI cells (derived from Burkitt’s lymphoma) were added to each fixative (red and blue) and stored at room temperature for a specified period (1 h; 1 week; and 1, 3, and 6 months). The specimens were then prepared using the SP-LBC method and subjected to ICC. Positivity rate was calculated using the specimens fixed at room temperature for 1 h as a control. Antibodies against Ki67 expressed in the nucleus and against CD20 and leukocyte common antigen (LCA) expressed on the cell membrane were used. <b><i>Results:</i></b> For CD20 and LCA, the positivity rate increased with time in the red fixative compared with that in the control. In the blue fixative, the positivity rate was highest at 1 h and was maintained at a high level throughout the storage period. In contrast, the Ki67 positivity rate was highest at 1 h in both red and blue fixatives and markedly decreased with time. Therefore, although refrigerated (8°C) storage was used, no improvement was noted. <b><i>Conclusions:</i></b> Long-term storage is possible for cell membrane antigens at room temperature; however, it is unsuitable for intranuclear antigens. Therefore, we conclude that suitable fixative type and storage temperature differ based on antigen location. Further investigation is warranted.

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