Effects of low pH and high temperature on two Palythoa spp. and predator–prey interactions in the subtropical eastern Atlantic

2020 ◽  
Author(s):  
Cataixa López ◽  
María Bas‐Silvestre ◽  
Adriana Rodríguez ◽  
Alberto Brito ◽  
Sabrina Clemente
Keyword(s):  
High Temperature ◽  
Low Ph ◽  
Predator Prey

Structure and Function of Nonorthodox Chromatins: II. Preliminary Results on the Localization of Helix-Stabilizing Histone-like Proteins of Thermophilic Archaebacteriae

1990 ◽  
Vol 48 (3) ◽  
pp. 122-123
Author(s):  
B. Bohrmann ◽  
B. Arnold-Schulz-Gahmen ◽  
W. Villiger ◽  
R. Gyalog ◽  
E. Kellenberger ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Free Space ◽  
Thermal Denaturation ◽  
Optimal Growth ◽  
Low Ph ◽  
Structure And Function ◽  
Sulfolobus Acidocaldarius ◽  
Thermoplasma Acidophilum ◽  
And Function

Sulfolobus acidocaldarius and Thermoplasma acidophilum prefer extreme living conditions of low pH (<3) and/or high temperature (>60°C) for optimal growth. To resist thermal denaturation of DNA it appears to be associated with helix stabilizing proteins.The chromosomal position of archaebacterial cells (the nucleoid) can be detected as ribosome-free space in which the DNA is located, as is shown by immunocytochemistry (fig. 1a,b). Similar to most eukaryotes the protein- DNA-ratio of their chromatin is relatively high (approx. 1:1 weight by weight), so that no aggregation occurs during dehydration for electron microscopy (fig. 2). Despite this aggregation-insensitivity, (2 and poster 1) the distribution of immunocytochemical label of the DNA bound proteins of Sulfolobus acidocaldarius (hsp's: A,B,C,C') is not exclusively connected with the bulk DNA of the nucleoid; only one of these proteins (C') seems to be associated with the bulk DNA.

CARPENTER 20Mo-6

Alloy Digest ◽  
1984 ◽  
Vol 33 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Field Tests ◽  
Heat Treating ◽  
Low Ph ◽  
Good Resistance ◽  
Cabot Corporation ◽  
Temperature Performance ◽  
Potential Applications

Abstract CARPENTER 20Mo-6 is an austenitic stainless steel which is resistant to corrosion in hot chloride environments with low pH. It has good resistance to pitting and stress-corrosion cracking in chloride environments and is also resistant to oxidizing media. Its good resistance to corrosion has been demonstrated in both laboratory and field tests. These tests indicate that potential applications for Carpenter 20Mo-6 include environments where HASTELLOY Alloy G (Cabot Corporation) is acceptable. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-444. Producer or source: Carpenter.

Sulfolobus: A new genus of sulfur-oxidizing bacteria living at low pH and high temperature

1972 ◽  
Vol 84 (1) ◽  
pp. 54-68 ◽  
Author(s):  
Thomas D. Brock ◽  
Katherine M. Brock ◽  
Robert T. Belly ◽  
Richard L. Weiss
Keyword(s):  
High Temperature ◽  
New Genus ◽  
Low Ph ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

The development and applications of sucralose, a new high-intensity sweetener

1994 ◽  
Vol 72 (4) ◽  
pp. 435-439 ◽  
Author(s):  
I. Knight
Keyword(s):  
High Temperature ◽  
Research Program ◽  
Collaborative Research ◽  
Low Ph ◽  
Hydroxyl Groups ◽  
Safety Testing ◽  
Food And Beverage ◽  
Selective Substitution ◽  
The University ◽  
Exceptional Stability

Sucralose is a new sweetener discovered during a collaborative research program between Tate &Lyle and Queen Elizabeth College of the University of London. It is made by selective substitution of sucrose hydroxyl groups by chlorine, resulting in a highly intense (600×) sugarlike sweetness and exceptional stability at both high temperature and low pH. The research leading to the discovery of sweetness in differently halogenated sucrose is described, as well as the development of sucralose and the process of safety testing and government approval. Finally, sucralose properties and applications in Canada's food and beverage industries are discussed.Key words: sucralose, sweetener, stability, halogen, chlorine.

Influence of the Ti precursor on the properties of Ti–pillared smectites

Clay Minerals ◽  
2001 ◽  
Vol 36 (1) ◽  
pp. 125-138 ◽  
Author(s):  
M. A. Vicente ◽  
M. A. Bañares-Muñoz ◽  
R. Toranzo ◽  
L. M. Gandía ◽  
A. Gil
Keyword(s):  
Acetic Acid ◽  
High Temperature ◽  
Titanium Tetrachloride ◽  
High Specific Surface Area ◽  
Complete Characterization ◽  
Low Ph ◽  
Titanium Tetraisopropoxide ◽  
Acid Attack ◽  
Octahedral Sheet

AbstractThe pillaring of smectites (two saponites and a montmorillonite) with various Ti precursors was studied. The minerals were intercalated with ‘classical ’ Ti precursors, such as titanium tetrachloride and titanium tetraethoxide, and also with new precursors, such as solutions of titanium tetraisopropoxide in acetic acid, or titanium (bis (ethylacetoacetato) diisopropoxide) in acetone. A complete characterization of the intercalated solids was carried out and a comparison of the properties of the solids as a function of the precursors used in the intercalation established. The influence of the severe conditions in which the intercalation with Ti oligomers is usually carried out (low pH and/or high temperature) on the properties of the intercalated solids was analysed. Intercalation with TiCl4 and Ti(EtO)4 strongly affected the structure of the clays, not by acid attack on the octahedral sheet, but mainly by disaggregation of particles. Ti(isop)4 was found to be less aggressive for the clays, while Ti(etacet)2(isop)2 did not form pillared solids but organo-clays, and therefore was of no use as a pillaring agent. The solids were thermally stable up to 300°C, showing a high specific surface area.

scholarly journals Warming has a greater effect than elevated CO 2 on predator–prey interactions in coral reef fish

2017 ◽  
Vol 284 (1857) ◽  
pp. 20170784 ◽  
Author(s):  
Bridie J. M. Allan ◽  
Paolo Domenici ◽  
Sue Ann Watson ◽  
Philip L. Munday ◽  
Mark I. McCormick
Keyword(s):  
High Temperature ◽  
Coral Reef ◽  
High Temperatures ◽  
Swimming Performance ◽  
Reef Fishes ◽  
Independent Effect ◽  
Combined Effects ◽  
Ecological Processes ◽  
Predator Prey ◽  
Short Term Exposure

Ocean acidification and warming, driven by anthropogenic CO 2 emissions, are considered to be among the greatest threats facing marine organisms. While each stressor in isolation has been studied extensively, there has been less focus on their combined effects, which could impact key ecological processes. We tested the independent and combined effects of short-term exposure to elevated CO 2 and temperature on the predator–prey interactions of a common pair of coral reef fishes ( Pomacentrus wardi and its predator, Pseudochromis fuscus ). We found that predator success increased following independent exposure to high temperature and elevated CO 2 . Overall, high temperature had an overwhelming effect on the escape behaviour of the prey compared with the combined exposure to elevated CO 2 and high temperature or the independent effect of elevated CO 2 . Exposure to high temperatures led to an increase in attack and predation rates. By contrast, we observed little influence of elevated CO 2 on the behaviour of the predator, suggesting that the attack behaviour of P. fuscus was robust to this environmental change. This is the first study to address how the kinematics and swimming performance at the basis of predator–prey interactions may change in response to concurrent exposure to elevated CO 2 and high temperatures and represents an important step to forecasting the responses of interacting species to climate change.

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