scholarly journals Response of Natural Cyanobacteria and Algae Assemblages to a Nutrient Pulse and Elevated Temperature

2018 ◽  
Vol 9 ◽  
Author(s):  
Miquel Lürling ◽  
Mariana Mendes e Mello ◽  
Frank van Oosterhout ◽  
Lisette de Senerpont Domis ◽  
Marcelo M. Marinho
Keyword(s):  
Elevated Temperature ◽  
Nutrient Pulse ◽  
Cyanobacteria And Algae

Evidence for a shear mechanism for the precipitation of γ-zirconium hydride in zirconium

1978 ◽  
Vol 36 (1) ◽  
pp. 658-659
Author(s):  
G.J.C. Carpenter
Keyword(s):  
Elevated Temperature ◽  
Strain Field ◽  
Zirconium Hydride ◽  
Zirconium Atom ◽  
Atom Diffusion ◽  
Solvus Temperature ◽  
Hexagonal Close Packed ◽  
Partial Dislocations ◽  
The Face

In zirconium-hydrogen alloys, rapid cooling from an elevated temperature causes precipitation of the face-centred tetragonal (fct) phase, γZrH, in the form of needles, parallel to the close-packed <1120>zr directions (1). With low hydrogen concentrations, the hydride solvus is sufficiently low that zirconium atom diffusion cannot occur. For example, with 6 μg/g hydrogen, the solvus temperature is approximately 370 K (2), at which only the hydrogen diffuses readily. Shears are therefore necessary to produce the crystallographic transformation from hexagonal close-packed (hep) zirconium to fct hydride.The simplest mechanism for the transformation is the passage of Shockley partial dislocations having Burgers vectors (b) of the type 1/3<0110> on every second (0001)Zr plane. If the partial dislocations are in the form of loops with the same b, the crosssection of a hydride precipitate will be as shown in fig.1. A consequence of this type of transformation is that a cumulative shear, S, is produced that leads to a strain field in the surrounding zirconium matrix, as illustrated in fig.2a.

Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

1988 ◽  
Vol 46 ◽  
pp. 550-551
Author(s):  
R. E. Franck ◽  
J. A. Hawk ◽  
G. J. Shiflet
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Grain Growth ◽  
Volume Fraction ◽  
Microstructural Characterization ◽  
Second Phase ◽  
Microstructural Stability ◽  
Elevated Temperature Strength ◽  
Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

Nutrient pulse induces dynamic changes in cellular C:N:P, amino acids, and paralytic shellfish poisoning toxins in Alexandrium tamarense

2013 ◽  
Vol 493 ◽  
pp. 57-69 ◽  
Author(s):  
DB Van de Waal ◽  
U Tillmann ◽  
M Zhu ◽  
BP Koch ◽  
B Rost ◽  
...  
Keyword(s):  
Amino Acids ◽  
Paralytic Shellfish Poisoning ◽  
Alexandrium Tamarense ◽  
Shellfish Poisoning ◽  
Dynamic Changes ◽  
Nutrient Pulse ◽  
Paralytic Shellfish

Growth and Physiological Characteristics of Abies koreana, Pinus densiflora, Quercus serrata Seedlings under Elevated Temperature and CO2 Concentration

2020 ◽  
Vol 11 (1) ◽  
pp. 1-9
Author(s):  
Woo Kyung Song ◽  
Go Eun Park ◽  
Sun Mi Je ◽  
Sun Hee Kim ◽  
Jong-Hwan Lim
Keyword(s):  
Elevated Temperature ◽  
Pinus Densiflora ◽  
Co2 Concentration ◽  
Quercus Serrata ◽  
Physiological Characteristics ◽  
Abies Koreana

Alkaloids of Nuphar lutea (L.) Smith. and their Influence on the Vital Activity of Cyanobacteria and Algae

2004 ◽  
Vol 40 (6) ◽  
pp. 108-120
Author(s):  
O. V. Balanda ◽  
V. A. Medved' ◽  
A. I. Sakevich
Keyword(s):  
Vital Activity ◽  
Nuphar Lutea ◽  
Cyanobacteria And Algae

An uncoupled viscoplastic constitutive model for metals at elevated temperature

1983 ◽  
Author(s):  
W. HAISLER ◽  
J. CRONENWORTH
Keyword(s):  
Elevated Temperature ◽  
Constitutive Model

Evaluation of creep crack growth criteria in IN-100 at elevated temperature

1981 ◽  
Author(s):  
T. HINNERICHS ◽  
A. PALAZOTTO ◽  
T. NICHOLAS
Keyword(s):  
Elevated Temperature ◽  
Crack Growth ◽  
Creep Crack Growth ◽  
Creep Crack

The study of cyanobacteria and algae in the Republic of Bashkortostan: a bibliography. Issue 2 (2002 - 2017)

2019 ◽  
Author(s):  
Shamil Abdullin ◽  
◽  
Dim Achmedyanov ◽  
Keyword(s):  
Republic Of Bashkortostan ◽  
The Republic ◽  
Cyanobacteria And Algae

SPECIES DIVERSITY OF CYANOBACTERIA AND ALGAE IN THE BUREYA RIVER BASIN (KHABAROVSK TERRITORY)

2019 ◽  
Vol 8 ◽  
pp. 91-113
Author(s):  
L.A. Medvedeva ◽  
◽  
T.V. Nikulina ◽  
Keyword(s):  
Species Diversity ◽  
River Basin ◽  
Cyanobacteria And Algae
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