Effects of Temperature, Pressure, and Oxygen Concentration on the Oxygen Consumption Rate of the Hydrothermal Vent Crab Bythograea thermydron (Brachyura)

1982 ◽  
Vol 55 (2) ◽  
pp. 199-207 ◽  
Author(s):  
Thomas J. Mickel ◽  
J. J. Childress
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Concentration ◽  
Hydrothermal Vent ◽  
Oxygen Consumption Rate ◽  
Consumption Rate ◽  
Effects Of Temperature ◽  
Bythograea Thermydron

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.

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.

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.

Sign in / Sign up

Export Citation Format

Share Document