scholarly journals Effect of Temperature and Time on Oxygen Consumption by Olive Fruit: Empirical Study and Simulation in a Non-Ventilated Container

Fermentation ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 200
Author(s):  
Eddy Plasquy ◽  
María C. Florido ◽  
Rafael Rubén Sola-Guirado ◽  
José María García Martos ◽  
Juan Francisco García Martín
Keyword(s):  
Oxygen Consumption ◽  
Anaerobic Respiration ◽  
Co2 Production ◽  
Effect Of Temperature ◽  
Critical Threshold ◽  
Irreversible Damage ◽  
Olive Fruit ◽  
Different Temperatures ◽  
Arrhenius Function

Fermentation processes within olive fruit jeopardize the quality of the extracted oil. Aeration, temperature, and time play a crucial role in attaining the critical threshold at which an aerobic respiration shifts towards anaerobic. In this work, the O2 consumption and CO2 production of olive fruit kept in a closed container at different temperatures (5–45 °C) were measured over 7 h. The data allowed us to describe the relationship between the temperature and the respiration rate as an Arrhenius function and simulate the oxygen consumption in the inner part of a container full of fruit with low aeration, considering the generated respiration heat over time. The simulation revealed that olives risk shifting to anaerobic respiration after 3 h at 25 °C and less than 2 h at 35 °C when kept in a non-ventilated environment. The results underline the irreversible damage that high day temperatures can produce during the time before fruit processing, especially during transport. Lowering, as soon as possible, the field temperature thus comes to the fore as a necessary strategy to guarantee the quality of the olives before their processing, like most of the fruit that is harvested at excessive temperatures.

The effect of temperature on the oxygen consumption of isolated human umbilical arteries

1970 ◽  
Vol 48 (6) ◽  
pp. 377-381 ◽  
Author(s):  
Carol Colthart ◽  
Margot R. Roach
Keyword(s):  
Oxygen Consumption ◽  
Low Temperatures ◽  
Arrhenius Plot ◽  
Post Partum ◽  
Effect Of Temperature ◽  
Metabolic Processes ◽  
Different Temperatures ◽  
High And Low Temperatures ◽  
Umbilical Arteries

The oxygen consumption [Formula: see text] of isolated segments of 40 human umbilical arteries was measured at different temperatures from 5 °C to 37 °C with a modified Fenn microrespirometer. The values varied from 8 μl/g per h at 8 °C to 70 μl/g per h at 37 °C. The Arrhenius plot was nonlinear, and the Q10 varied from 0.11 (30–40 °C) to 1.8 (20–30 °C) and 7.1 (10–20 °C). This suggests that the metabolic processes may be different at high and low temperatures. The results were consistent for at least 5 h post partum, and did not seem to vary from one segment of the cord to another.

Effect of Growth Temperature on the Indium Incorporation in InGaN Epitaxial Films

2011 ◽  
Vol 287-290 ◽  
pp. 1456-1459 ◽  
Author(s):  
P. C Chang ◽  
C. L Yu ◽  
Y. W Jahn ◽  
S. J Chang ◽  
K. H Lee
Keyword(s):  
Optoelectronic Devices ◽  
Chemical Vapor ◽  
Epitaxial Films ◽  
Effect Of Temperature ◽  
X Ray Diffraction ◽  
Film Properties ◽  
X Ray ◽  
Different Temperatures ◽  
Peak Emission

InxGa1-xN epilayers have been grown by metalorganic chemical vapor deposition (MOCVD) at different temperatures between 740°C to 830°C. The thickness of InGaN film is 50nm for all samples. The incorporation of indium is found to increase with decreasing grown temperature. The optical properties and film quality of the samples have been investigated by photoluminescence (PL) system and X-ray diffraction (XRD). The Full Width at Half Maximum (FWHM) of PL and XRD decreases with increasing the grown temperature. We also found that the peak emission of PL shifts with changing the grown temperature. The effect of temperature on the film properties was determined. This understanding will lead to better quality control of the optoelectronic devices.

scholarly journals Effect Of Temperature And Storage Time On The Nutritional Quality Of Olive Drupes: A Case Study

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Enrico Finotti ◽  
Loretta Gambelli ◽  
Gioia Meysem Mili ◽  
Gabrielle Lo Feudo ◽  
Cinzia Benincasa ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Sensory Analysis ◽  
Nutritional Quality ◽  
Storage Time ◽  
Quality Parameters ◽  
Effect Of Temperature ◽  
Different Temperatures ◽  
And Storage

In this study we evaluated the effect of temperature and time storage on the quality parameters of mono cultivar olive oil drupes. In particular, analyses of total free phenols, fatty acids, lipophilic and hydrophilic antioxidant capacity, sensory analysis, at different temperatures and different times of post harvest storage, were performed. All data obtained have been singularly processed by Functional Mathematical Index (FMI).

scholarly journals Effect of temperature and type of packages on quality of stored lettuce

2013 ◽  
Vol 49 (1-2) ◽  
pp. 73-82
Author(s):  
Józef Bąkowski ◽  
Helena Michalik ◽  
Marcin Horbowicz
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Dry Matter ◽  
Storage Time ◽  
Ascorbic Acid Content ◽  
Effect Of Temperature ◽  
Different Temperatures

Lettuce head cv. Sanora non-wrapped, wrapped with perforated PE film, unperforated PE film, and in stretch film was stored at different temperatures: 1, 6, 20 and 28°C. The lettuce can be stored at 1°C up to 10 days, and at 6°C during 8 days period. Longer storage time caused clear loses of lettuce quality. During first two - three days of storage in both temperatures 1 and 6°C loses of ascorbic acid, dry matter, colour and organoleptic value were not observed. Faster decrease of ascorbic acid content was noted in leuuce stored in unperforated PE film and stretch film, in comparison to perforated PE film. The highest lettuce quality were found in case where lettuce were stored in perforated PE bags at 1°C.

Changes in the Microbiological Quality of Mangrove Oysters (Crassostrea brasiliana) during Different Storage Conditions

2015 ◽  
Vol 78 (1) ◽  
pp. 164-171 ◽  
Author(s):  
MAIKE TAÍS MAZIERO MONTANHINI ◽  
ROBERTO MONTANHINI NETO
Keyword(s):  
Shelf Life ◽  
Microbiological Quality ◽  
Storage Condition ◽  
Storage Conditions ◽  
Effect Of Temperature ◽  
Total Coliforms ◽  
E Coli ◽  
Different Temperatures ◽  
Contamination Levels

This study aimed to determine the effect of temperature and period of postharvest storage on the microbiological quality and shelf life of raw mangrove oysters, Crassostrea brasiliana. A total of 150 dozen oysters were collected directly from the points of extraction or cultivation in southern Brazil, and in the laboratory, they were stored raw at 5, 10, 15, 20, and 25°C for 1, 4, 8, 11, and 15 days. On each of these days, the oysters were subjected to microbiological analyses of aerobic mesophilic count, total coliforms, enterococci, Escherichia coli, Staphylococcus aureus, and Salmonella. None of the tested samples under any storage condition showed contamination levels above those allowed by Brazilian legislation for E. coli, S. aureus, and Salmonella, and there was no change (P > 0.05) in the counts of these microorganisms due to the temperature and/or period of oyster storage. Counts of enterococci and total coliforms showed a tendency to increase (P < 0.05) among the different temperatures tested. Raw mangrove oysters remain in safe microbiological conditions for consumption up to 8 days after harvesting, regardless of temperature, and their shelf life may be extended to 15 days if they are stored at temperatures not exceeding 15°C.

Incubation of eggs of the Australian broad-shelled turtle, Chelodina expansa (Testudinata : Chelidae), at different temperatures: effects on pattern of oxygen consumption and hatchling morphology

2000 ◽  
Vol 48 (4) ◽  
pp. 369 ◽  
Author(s):  
David T. Booth
Keyword(s):  
Oxygen Consumption ◽  
Energy Expenditure ◽  
Production Efficiency ◽  
Incubation Temperature ◽  
Effect Of Temperature ◽  
Temperature Dependent ◽  
Rate Of Increase ◽  
Different Temperatures ◽  
Rate Of Oxygen Consumption ◽  
Incubation Temperatures

Incubation temperature influences embryonic development and the morphology of resultant hatchlings in many species of turtle but few studies have addressed its effect on oxygen consumption and total embryonic energy expenditure. Eggs of the Australian broad-shelled river turtle, Chelodina expansa, were incubated at constant temperatures of 24˚C and 28˚C to determine the effect of temperature on oxygen consumption, embryonic energy expenditure and hatchling morphology. All embryos at both incubation temperatures experienced a period of developmental diapause immediately after oviposition. Once this initial diapause was broken, embryos underwent a further period of developmental arrest when the embryo was still very small and had minimal oxygen consumption (<20 µL h–1). However, once rapid embryonic growth started, development appeared to be continuous. Rate of increase and peak rate of oxygen consumption were temperature dependent, both being highest at 28˚C. Net production efficiency (total oxygen consumed during incubation divided by yolk-free hatchling mass) was 120 mL O2 g–1 at 24˚C and 111 mL O2g–1 at 28˚C. Hatchling mass and yolk-free hatchling mass were independent of incubation temperature, but hatchlings from 28˚C had larger residual yolks and smaller head widths than hatchlings from 24˚C.

scholarly journals The Respiration of some Planktonic copepods II. The Effect Of Temperature

1953 ◽  
Vol 31 (3) ◽  
pp. 447-460 ◽  
Author(s):  
D. T. Gauld ◽  
J. E. G. Raymont
Keyword(s):  
Respiratory Rate ◽  
The Body ◽  
The Other ◽  
Effect Of Temperature ◽  
Acartia Clausi ◽  
Temora Longicornis ◽  
Different Temperatures ◽  
Planktonic Copepods ◽  
The Difference ◽  
The Relationship

The respiratory rates of three species of planktonic copepods, Acartia clausi, Centropages hamatus and Temora longicornis, were measured at four different temperatures.The relationship between respiratory rate and temperature was found to be similar to that previously found for Calanus, although the slope of the curves differed in the different species.The observations on Centropages at 13 and 170 C. can be divided into two groups and it is suggested that the differences are due to the use of copepods from two different generations.The relationship between the respiratory rates and lengths of Acartia and Centropages agreed very well with that previously found for other species. That for Temora was rather different: the difference is probably due to the distinct difference in the shape of the body of Temora from those of the other species.The application of these measurements to estimates of the food requirements of the copepods is discussed.

scholarly journals Effect of temperature, CO2 and O2 on motility and mobility of Anisakidae larvae

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aiyan Guan ◽  
Inge Van Damme ◽  
Frank Devlieghere ◽  
Sarah Gabriël
Keyword(s):  
Enzymatic Digestion ◽  
Infected Fish ◽  
Effect Of Temperature ◽  
Video Recordings ◽  
Different Temperatures ◽  
Semi Solid ◽  
Zoonotic Parasites ◽  
The Impact ◽  
Phosphate Buffered Saline

AbstractAnisakidae, marine nematodes, are underrecognized fish-borne zoonotic parasites. Studies on factors that could trigger parasites to actively migrate out of the fish are very limited. The objective of this study was to assess the impact of different environmental conditions (temperature, CO2 and O2) on larval motility (in situ movement) and mobility (migration) in vitro. Larvae were collected by candling or enzymatic digestion from infected fish, identified morphologically and confirmed molecularly. Individual larvae were transferred to a semi-solid Phosphate Buffered Saline agar, and subjected to different temperatures (6 ℃, 12 ℃, 22 ℃, 37 ℃) at air conditions. Moreover, different combinations of CO2 and O2 with N2 as filler were tested, at both 6 °C and 12 °C. Video recordings of larvae were translated into scores for larval motility and mobility. Results showed that temperature had significant influence on larval movements, with the highest motility and mobility observed at 22 ℃ for Anisakis spp. larvae and 37 ℃ for Pseudoterranova spp. larvae. During the first 10 min, the median migration of Anisakis spp. larvae was 10 cm at 22 ℃, and the median migration of Pseudoterranova spp. larvae was 3 cm at 37 ℃. Larval mobility was not significantly different under the different CO2 or O2 conditions at 6 °C and 12 ℃. It was concluded that temperature significantly facilitated larval movement with the optimum temperature being different for Anisakis spp. and Pseudoterranova spp., while CO2 and O2 did not on the short term. This should be further validated in parasite-infected/spiked fish fillets.

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