scholarly journals Predation of Aegla denticulata (Crustacea, Aeglidae) upon the ammocoetes stage of Geotria australis (Chordata, Petromyzontidae) in a confined environment

2018 ◽  
Vol 46 (1) ◽  
pp. 234-236
Author(s):  
Sam Catchpole ◽  
Victor Ruiz
Keyword(s):  
Geotria Australis ◽  
Confined Environment

scholarly journals Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 590
Author(s):  
Lihua Wan ◽  
Xiaoya Zang ◽  
Juan Fu ◽  
Xuebing Zhou ◽  
Jingsheng Lu ◽  
...  
Keyword(s):  
Natural Gas ◽  
Methane Hydrate ◽  
Phase State ◽  
Solid Phase ◽  
Potential Method ◽  
Methane Hydrates ◽  
Low Density ◽  
Hydrate Dissociation ◽  
State Of Water ◽  
Confined Environment

The large amounts of natural gas in a dense solid phase stored in the confined environment of porous materials have become a new, potential method for storing and transporting natural gas. However, there is no experimental evidence to accurately determine the phase state of water during nanoscale gas hydrate dissociation. The results on the dissociation behavior of methane hydrates confined in a nanosilica gel and the contained water phase state during hydrate dissociation at temperatures below the ice point and under atmospheric pressure are presented. Fourier transform infrared spectroscopy (FTIR) and powder X-ray diffraction (PXRD) were used to trace the dissociation of confined methane hydrate synthesized from pore water confined inside the nanosilica gel. The characterization of the confined methane hydrate was also analyzed by PXRD. It was found that the confined methane hydrates dissociated into ultra viscous low-density liquid water (LDL) and methane gas. The results showed that the mechanism of confined methane hydrate dissociation at temperatures below the ice point depended on the phase state of water during hydrate dissociation.

Effect of vimentin on cell migration in collagen-coated microchannels: A mimetic physiological confined environment

2021 ◽  
Vol 15 (3) ◽  
pp. 034105
Author(s):  
Zhiru Zhou ◽  
Feiyun Cui ◽  
Qi Wen ◽  
H. Susan Zhou
Keyword(s):  
Cell Migration ◽  
Confined Environment

Cryogenic leakage risk analysis for FLNG and use of brittle crack arresting material as a risk mitigation measure

2015 ◽  
Author(s):  
Akio Usami ◽  
Naohiko Kishimoto ◽  
Hiroki Kusumoto ◽  
Fujio Kaneko ◽  
Takehiro Inoue
Keyword(s):  
Carbon Steel ◽  
Risk Analysis ◽  
Brittle Fracture ◽  
Risk Mitigation ◽  
Brittle Crack ◽  
Cryogenic Fluid ◽  
Mitigation Measure ◽  
Flammable Gas ◽  
Confined Environment

Leakage of cryogenic fluid can bring diverse consequences within confined environment like FLNG. In particular, leakage from pressurized refrigerant system is expected to form cryogenic pool, which could initiate brittle fracture of the structure as well as violent evaporation of flammable gas. The authors put the series of different leakage scenarios under light and quantitatively analyzed the potential consequences in an attempt to provide overall pictures of this hazard yet to have been made clear so far. Further, use of brittle fracture arresting steel – a new strain of carbon steel produced through special TMCP technology – was explored on its potential to mitigate the risk.

scholarly journals The effect of temperature on the oxygen dissociation curves of whole blood of larval and adult lampreys (Geotria australis)

1982 ◽  
Vol 97 (1) ◽  
pp. 253-261
Author(s):  
D. J. Macey ◽  
I. C. Potter
Keyword(s):  
Whole Blood ◽  
Life Cycle Stage ◽  
Effect Of Temperature ◽  
High Affinity ◽  
Oxygen Dissociation ◽  
Geotria Australis ◽  
Oxygen Tensions ◽  
Dissociation Curves ◽  
Hill Plots ◽  
Very High

1. Oxygen dissociation curves of the whole blood of larvae and adults of the Southern Hemisphere lamprey Geotria australis have been determined between pH 6.8 and 8.2 at 5, 15 and 25 degrees C. 2. The P50's at temperatures of 5, 15 and 25 degrees C and a pH of 7.75 were respectively 0.57, 0.92 and 1.19 mmHg in larvae and 6.9, 10.3 and 19.0 mmHg in adults. 3. The relatively very high affinity of larval blood for oxygen may reflect an adaptation to low environmental oxygen tensions. 4. The Bohr shift was not significantly affected by either temperature or life-cycle stage. 5. The slope (n) in Hill plots increased with temperature and oxygen saturation, and was greater in adults than in larvae.

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