The adaptive significance of blood potassium and hemoglobin types in sheep

1968 ◽  
Vol 24 (12) ◽  
pp. 1274-1275 ◽  
Author(s):  
N. S. Agar
Keyword(s):  
Adaptive Significance ◽  
Blood Potassium

Potassium and Sodium Content of Muscle from Sheep with High and Low Blood Potassium

1968 ◽  
Vol 27 (3) ◽  
pp. 645
Author(s):  
T. A. Gillett ◽  
A. M. Pearson ◽  
R. A. Merkel ◽  
W. T. Magee
Keyword(s):  
Sodium Content ◽  
Blood Potassium

Adaptive significance of mass-flowering in Hedychium coccineum (Zingiberaceae)

2013 ◽  
Vol 20 (3) ◽  
pp. 376-385
Author(s):  
Gao Jiangyun ◽  
Sheng Chunling ◽  
Yang Shuxia
Keyword(s):  
Adaptive Significance ◽  
Mass Flowering

scholarly journals Horizontal Gene Transfer Involving Chloroplasts

2021 ◽  
Vol 22 (9) ◽  
pp. 4484
Author(s):  
Ewa Filip ◽  
Lidia Skuza
Keyword(s):  
Gene Transfer ◽  
Horizontal Gene Transfer ◽  
Driving Force ◽  
Genetic Material ◽  
Adaptive Significance ◽  
Chloroplast Genomes ◽  
Organelle Genomes ◽  
Number Of Genes ◽  
Cellular Compartments

Horizontal gene transfer (HGT)- is defined as the acquisition of genetic material from another organism. However, recent findings indicate a possible role of HGT in the acquisition of traits with adaptive significance, suggesting that HGT is an important driving force in the evolution of eukaryotes as well as prokaryotes. It has been noted that, in eukaryotes, HGT is more prevalent than originally thought. Mitochondria and chloroplasts lost a large number of genes after their respective endosymbiotic events occurred. Even after this major content loss, organelle genomes still continue to lose their own genes. Many of these are subsequently acquired by intracellular gene transfer from the original plastid. The aim of our review was to elucidate the role of chloroplasts in the transfer of genes. This review also explores gene transfer involving mitochondrial and nuclear genomes, though recent studies indicate that chloroplast genomes are far more active in HGT as compared to these other two DNA-containing cellular compartments.

scholarly journals The (in)dependency of blood and sweat sodium, chloride, potassium, ammonia, lactate and glucose concentrations during submaximal exercise

2020 ◽  
Author(s):  
L. Klous ◽  
C. J. de Ruiter ◽  
S. Scherrer ◽  
N. Gerrett ◽  
H. A. M. Daanen
Keyword(s):  
Sodium Chloride ◽  
Submaximal Exercise ◽  
Blood Composition ◽  
Maximum Heart Rate ◽  
Post Exercise ◽  
Non Invasive ◽  
Potassium Lactate ◽  
Blood Potassium ◽  
Sweat Composition ◽  
Sweat Sodium

Abstract Purpose To reduce the need for invasive and expensive measures of human biomarkers, sweat is becoming increasingly popular in use as an alternative to blood. Therefore, the (in)dependency of blood and sweat composition has to be explored. Methods In an environmental chamber (33 °C, 65% relative humidity; RH), 12 participants completed three subsequent 20-min cycling stages to elicit three different local sweat rates (LSR) while aiming to limit changes in blood composition: at 60% of their maximum heart rate (HRmax), 70% HRmax and 80% HRmax, with 5 min of seated-rest in between. Sweat was collected from the arm and back during each stage and post-exercise. Blood was drawn from a superficial antecubital vein in the middle of each stage. Concentrations of sodium, chloride, potassium, ammonia, lactate and glucose were determined in blood plasma and sweat. Results With increasing exercise intensity, LSR, sweat sodium, chloride and glucose concentrations increased (P ≤ 0.026), while simultaneously limited changes in blood composition were elicited for these components (P ≥ 0.093). Sweat potassium, lactate and ammonia concentrations decreased (P ≤ 0.006), while blood potassium decreased (P = 0.003), and blood ammonia and lactate concentrations increased with higher exercise intensities (P = 0.005; P = 0.007, respectively). The vast majority of correlations between blood and sweat parameters were non-significant (P > 0.05), with few exceptions. Conclusion The data suggest that sweat composition is at least partly independent of blood composition. This has important consequences when targeting sweat as non-invasive alternative for blood measurements.

On the Adaptive Significance of Circadian Clocks for Their Owners

2013 ◽  
Vol 30 (4) ◽  
pp. 413-433 ◽  
Author(s):  
Koustubh M. Vaze ◽  
Vijay Kumar Sharma
Keyword(s):  
Adaptive Significance ◽  
Circadian Clocks
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