The relationships between ambient oxygen concentration, temperature, body weight, and oxygen consumption for Mysis relicta (Malacostraca: Mysidacea)

1980 ◽  
Vol 58 (6) ◽  
pp. 1032-1036 ◽  
Author(s):  
I. M. Sandeman ◽  
D. C. Lasenby
Keyword(s):  
Body Weight ◽  
Oxygen Consumption ◽  
Oxygen Concentration ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Mysis Relicta ◽  
Ambient Oxygen ◽  
Kootenay Lake ◽  
Oxygen Concentrations

The relationships between ambient oxygen concentration, temperature, body weight, and oxygen consumption for Mysis relicta in Kootenay Lake, B.C. are examined. Mysis oxygen consumption rate declined with both decreasing temperatures and ambient oxygen concentrations.

Oxygen consumption of nymphs of Phasganophora capitata (Pictet) (Plecoptera) with respect to body weight and oxygen concentrations

1975 ◽  
Vol 53 (8) ◽  
pp. 1089-1092 ◽  
Author(s):  
N. N. Kapoor ◽  
W. Griffiths
Keyword(s):  
Body Weight ◽  
Oxygen Consumption ◽  
Dissolved Oxygen ◽  
Metabolic Rate ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
The Body ◽  
Oxygen Concentrations

A closed respirometer was used for the measurement of respiratory rates [Formula: see text] of nymphs of Phasganophora capitata (Pictet). Nymphs were found to be conformers since they reduced their oxygen consumption rate when the level of dissolved oxygen in the water was reduced.No significant correlation (P > 0.05) was observed between oxygen consumption and body weight. The metabolic rate [Formula: see text] of nymphs increased less than the body weight or mass.

scholarly journals Oxygen Consumption by Phalaenopsis Plantlets and Chrysanthemum Cuttings as a Function of Temperature and Time: Model Structure Validation

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 237
Author(s):  
Lieven Van de Vondel ◽  
Annelies Christiaens ◽  
An Vermeulen ◽  
Marie-Christine Van Labeke ◽  
Frank Devlieghere ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Concentration ◽  
Plant Species ◽  
Respiration Rate ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Storage Temperature ◽  
Modified Atmosphere Packaging ◽  
Modified Atmosphere ◽  
Model Structure

Phalaenopsis spp. and Chrysanthemum are ornamentals with an important economic value. Currently, quality loss during storage and transport of plantlets and cuttings is a limiting factor for spreading the workload, broadening the export range, and the use of slower but more environmentally friendly transport. In the agro-food sector, equilibrium modified atmosphere packaging has enhanced the shelf-life of minimally processed produce. The required properties for an equilibrium modified atmosphere packaging system can be estimated from the respiration rate of the packaged commodity under specified atmospheric composition and storage temperature. In this work, a model structure is validated to estimate the respiration rate as a function of oxygen concentration and temperature for Phalaenopsis and Chrysanthemum. The oxygen concentration as a function of time was monitored in a closed system for different storage temperatures. The models show a good fit to the data. The model coefficients were dependent on the plant species and characteristics. The resulting formulae can be used to estimate the oxygen consumption rate of the produce under a range of oxygen concentrations and a temperature range from 15 °C to 32 °C for Phalaenopsis and from 2 °C to 14 °C for Chrysanthemum. The oxygen concentrations for which the formulae are valid depend on the storage temperature and plant species. The models can be used to estimate a dynamic oxygen consumption rate profile during storage and transport.

scholarly journals Measuring and Modeling Oxygen Transport and Consumption in 3D Hydrogels Containing Chondrocytes and Stem Cells of Different Tissue Origins

2021 ◽  
Vol 9 ◽  
Author(s):  
Simon F. Carroll ◽  
Conor T. Buckley ◽  
Daniel J. Kelly
Keyword(s):  
Stem Cells ◽  
Oxygen Consumption ◽  
Oxygen Concentration ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Cartilage Matrix ◽  
Matrix Synthesis ◽  
Cellular Oxygen ◽  
Local Oxygen ◽  
Consumption Profile

Understanding how the local cellular environment influences cell metabolism, phenotype and matrix synthesis is crucial to engineering functional tissue grafts of a clinically relevant scale. The objective of this study was to investigate how the local oxygen environment within engineered cartilaginous tissues is influenced by factors such as cell source, environmental oxygen tension and the cell seeding density. Furthermore, the subsequent impact of such factors on both the cellular oxygen consumption rate and cartilage matrix synthesis were also examined. Bone marrow derived stem cells (BMSCs), infrapatellar fat pad derived stem cells (FPSCs) and chondrocytes (CCs) were seeded into agarose hydrogels and stimulated with transforming growth factor-β3 (TGF- β3). The local oxygen concentration was measured within the center of the constructs, and numerical modeling was employed to predict oxygen gradients and the average oxygen consumption rate within the engineered tissues. The cellular oxygen consumption rate of hydrogel encapsulated CCs remained relatively unchanged with time in culture. In contrast, stem cells were found to possess a relatively high initial oxygen consumption rate, but adopted a less oxidative, more chondrocyte-like oxygen consumption profile following chondrogenic differentiation, resulting in net increases in engineered tissue oxygenation. Furthermore, a greater reduction in oxygen uptake was observed when the oxygen concentration of the external cell culture environment was reduced. In general, cartilage matrix deposition was found to be maximal in regions of low oxygen, but collagen synthesis was inhibited in very low (less than 2%) oxygen regions. These findings suggest that promoting an oxygen consumption profile similar to that of chondrocytes might be considered a key determinant to the success of stem cell-based cartilage tissue engineering strategies.

Microbial efficiency in a meromictic reservoir

2008 ◽  
Vol 37 (2) ◽  
Author(s):  
Grażyna Mazurkiewicz-Boroń ◽  
Teresa Bednarz ◽  
Elżbieta Wilk-Woźniak
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Release Rate ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Metabolic Efficiency ◽  
Sulphur Compounds ◽  
Carbon Dioxide Release ◽  
Microbial Efficiency ◽  
Ion Contents

Microbial efficiency in a meromictic reservoirIndices of microbial efficiency (expressed as oxygen consumption and carbon dioxide release) were determined in the water column of the meromictic Piaseczno Reservoir (in an opencast sulphur mine), which is rich in sulphur compounds. Phytoplankton abundances were low in both the mixolimnion (up to 15 m depth) and monimolimnion (below 15 m depth). In summer and winter, carbon dioxide release was 3-fold and 5-fold higher, respectively, in the monimolimnion than in the mixolimnion. Laboratory enrichments of the sulphur substrate of the water resulted in a decrease in oxygen consumption rate of by about 42% in mixolimnion samples, and in the carbon dioxide release rate by about 69% in monimolimnion samples. Water temperature, pH and bivalent ion contents were of major importance in shaping the microbial metabolic efficiency in the mixolimnion, whilst in the monimolimnion these relationships were not evident.

scholarly journals Correction: Paszkiewicz et al. A Peripheral CB1R Antagonist Increases Lipolysis, Oxygen Consumption Rate, and Markers of Beiging in 3T3-L1 Adipocytes Similar to RIM, Suggesting That Central Effects Can Be Avoided. Int. J. Mol. Sci. 2020, 21, 6639

2021 ◽  
Vol 22 (9) ◽  
pp. 4366
Author(s):  
Rebecca L. Paszkiewicz ◽  
Richard N. Bergman ◽  
Roberta S. Santos ◽  
Aaron P. Frank ◽  
Orison O. Woolcott ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Central Effects

The authors wish to make the following corrections to this paper [...]

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