scholarly journals Influence of Temperature on CO₂ and H₂S Corrosion Rates of Steel Pipelines Using Alloy-Select Software in the Lebanese Oil and Gas Offshore Environment

2021 ◽  
Vol 4 (2) ◽  
pp. 44-51
Author(s):  
Rawanne Farsakouri
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Corrosion Inhibitor ◽  
Significant Influence ◽  
Oil And Gas ◽  
Influence Of Temperature ◽  
Suitable Material ◽  
Corrosion Rates ◽  
Water Composition ◽  
Influence Of Temperature On

By referring to the fact that corrosion rates alter upon variation of different conditions and no research relevant to Lebanon address corrosion issues yet, this study was conducted based on accurate Lebanese offshore data and water composition. Based on "Alloy Select Software", identifying the most suitable material from different alloys was revealed, which turned out to be Copper and Aluminum based alloys. Moreover, corrosion rates were detected under different conditions of Temperature, CO₂, and H₂S and then repeated in the presence of a corrosion inhibitor. Results of these studies proved the significant influence of high temperature accompanied with high CO₂ percentage. However, different results concerning low temperature with different percentages of H₂S were obtained.

Influence of Temperature on the Hydration Heat of Polymer Modified Mortars

2013 ◽  
Vol 687 ◽  
pp. 130-135
Author(s):  
Si Feng Liu ◽  
Si Jun Guo ◽  
Pei Ming Wang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Vinyl Acetate ◽  
Cement Mortar ◽  
Ethylene Vinyl Acetate ◽  
Hydration Heat ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Effects Of Temperature ◽  
Isothermal Calorimeter

The hydration heat of polymer modified mortar were measured at 5°C、10°C、20°C and 40°C using Multi-channel Isothermal calorimeter. The effects of temperature on hydration heat of polymer modified mortars with 0.1% methyl hydroxylpropyl cellulose (MHPC), 3% ethylene vinyl acetate (EVA) and 0.1%MHPC+3%EVA were investigated. The curves of hydration heat show that the polymer reduces the hydration heat of mortars and it is related to the temperature. The effects will be more and more remarkable with the increasing of temperature; Temperature also affects the exothermic rate peak of polymer modified mortars. The exothermic rate peak of polymer modified mortar at low temperature is almost equal to that of the ordinary cement mortar. However, it is obviously lower than that of ordinary cement mortar at high temperature ; The time to the exothermic rate peak of polymer modified mortar is also related to the temperature.

Effect of Temperature on Crater Formation and Ejecta Composition in Aluminum Alloy Targets

2012 ◽  
Vol 706-709 ◽  
pp. 768-773
Author(s):  
Masahiro Nishida ◽  
Koichi Hayashi ◽  
Junichi Nakagawa ◽  
Yoshitaka Ito
Keyword(s):  
Aluminum Alloy ◽  
High Temperature ◽  
Low Temperature ◽  
Room Temperature ◽  
Effect Of Temperature ◽  
Crater Formation ◽  
Influence Of Temperature ◽  
Gas Gun ◽  
Influence Of Temperature On ◽  
Increasing Temperature

The influence of temperature on crater formation and ejecta composition in thick aluminum alloy targets were investigated for impact velocities ranging from approximately 1.5 to 3.5 km/s using a two-stage light-gas gun. The diameter and depth of the crater increased with increasing temperature. The ejecta size at low temperature was slightly smaller than that at high temperature and room temperature. Temperature did not affect the size ratio of ejecta. The scatter diameter of the ejecta at high temperature was slightly smaller than those at low and room temperatures.

scholarly journals The Influence of Temperature on the Completion of Diapause in the Eggs of Gryllulus Commodus Walker

1952 ◽  
Vol 5 (1) ◽  
pp. 112 ◽  
Author(s):  
TO Browning
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Early Stage ◽  
Morphological Development ◽  
Influence Of Temperature ◽  
Long Period ◽  
Influence Of Temperature On

The eggs of GryUulus commodus, if incubated at high temperature (26.8�C.), soon after laying, did not develop and hatch promptly. Instead hatching was spread over a long period and many eggs died. If the eggs were given a period of exposure to low temperature (12.8�C.) before incubation at high temperature,� prompt hatching occurred. This was due to diapause, which occurred at an early stage in the morphological development of the egg.

Diapause in the Eggs of Austroicetes cruciata, Sauss. (Acrididae) with particular Reference to the Influence of Temperature on the Elimination of Diapause

1943 ◽  
Vol 34 (1) ◽  
pp. 1-17 ◽  
Author(s):  
H. G. Andrewartha
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Abnormal Growth ◽  
Inhibition Of Growth ◽  
Stage Of Development ◽  
Influence Of Temperature On ◽  
Temperature Ranges ◽  
The One

Diapause should not be confused with simple inhibition of growth due to cold.The embryo of the grasshopper, Austroicetes cruciata, enters a state of diapause a few days after the egg is laid. The diapause is obligate like that found in the eggs of Circotettix, rather than facultative like that found in the larvae of Platyedra. These types of diapause should be regarded as two extremes of the one phenomenon rather than two distinct phenomena.Diapause was eliminated when the egg was exposed to adequate low temperature for an adequate period when the embryo was at a suitable stage of development. If the period at low temperature was inadequate, or if the embryo was not at a suitable stage of development when the exposure to low temperature occurred, diapause was only partially eliminated. In such cases, the exposure to low temperature resulted in an abnormal growth by the embryo when the egg was returned to a favourable high temperature, but development was not completed.The influence of low temperature on the elimination of diapause was due chiefly to changes which occurred in the yolk during exposure to low temperature. Thus yolk which had been modified in this way became suitable for the nourishment of the embryo, and it no longer obstructed katatrepsis. This explanation of the nature of the obligate diapause in the eggs of Austroicetes brings this phenomenon into line with the facultative diapause in the larvae of Platyedra, which has been shown to be associated with the nourishment of the larva.Diapause was eliminated most rapidly at temperatures between 6°C. and 13°C. The embryo grew most rapidly at about 30°C. ; below 13°C. growth practically ceased. The absence of overlapping of the temperature ranges for these two processes may explain the presence of diapause in Austroicetes. The occurrence of a less pronounced diapause in the eggs of Melanoplus may be due to a partial overlapping of the temperature range for the two processes. Similarly the absence of diapause in the eggs of Locusta may be explained on the assumption that in this species the two processes proceed over the same temperature range.

Experimental Study on the Influence of Temperature on Shale Mechanical Properties under Conventional Triaxial Compression

2011 ◽  
Vol 250-253 ◽  
pp. 1452-1455 ◽  
Author(s):  
Lu Bo Meng ◽  
Tian Bin Li ◽  
Liang Wen Jiang ◽  
Hong Min Ma
Keyword(s):  
Mechanical Properties ◽  
Thermal Stress ◽  
Elastic Modulus ◽  
High Temperature ◽  
Poisson’S Ratio ◽  
Triaxial Compression ◽  
Poisson's Ratio ◽  
Influence Of Temperature ◽  
Conventional Triaxial Compression ◽  
Influence Of Temperature On

High temperature conventional triaxial compression test of shale are carried out by the MTS815 servo-controlled testing machine, based on the experimental results, the relationships between temperature and shale peak strength, elastic modulus, Poisson's ratio, cohesion, internal friction angle are investigated. Although the experimental results are discrete comparatively, the general law is obvious. When the confining pressure imposed on shale is constant and the temperature changes form 25°C to 120°C, with the increasing of the temperature, the triaxial compression strength, shear strength gradually increase, while average elastic modulus, Poisson's ratio has a slightly decrease. The thermal stress generated by the high temperature plays a role to accommodate the deformation and the function of preventing crack propagation, thus the bearing capacity of shale samples are strengthened. But the influence of temperature on shale mechanical properties mutates when the temperature is at 80°C. Shale peak strength dramatically decreased, average elastic modulus decreased slightly, and Poisson's ratio also increased slightly, which indicated that at 80°C, different thermal expansivity of mineral particles of shale may cause cross-grain boundary thermal expansion incongruous, creating additional thermal stress, thus the sample’s bearing capacity decreased.

scholarly journals THE INFLUENCE OF TEMPERATURE ON THE ACTION OF STRYCHNIN IN FROGS

1913 ◽  
Vol 18 (3) ◽  
pp. 300-309 ◽  
Author(s):  
Thomas Stotesbury Githens
Keyword(s):  
Low Temperature ◽  
High Temperatures ◽  
Low Temperatures ◽  
Room Temperature ◽  
Drug Action ◽  
The State ◽  
Great Caution ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

In order to establish the influence of temperature upon the effect of varying doses of strychnin injected into frogs, the animals must be kept under observation for several days and at various definite degrees of temperature. Statements that the animal was kept "cold," "at room temperature," or "warm" are insufficient. With a certain dose tetanus may result constantly at 30° C. yet never appear at 21° C., and either of these temperatures might be described as warm, when compared to a room temperature of 15° C. Furthermore an animal may apparently fail to respond in the cold to an injection of certain doses of strychnin and yet be found in tetanic convulsions the next day. That an animal may have late, long lasting, or strong tetanus while kept at such a low temperature as 5° C. after an injection of a dose of strychnin smaller than 0.01 of a milligram per frog emphasizes the fact that great caution must be exercised in formulating laws as to the influence of temperature on drug action. The main results of this investigation may be summarized as follows: Doses of strychnin amounting to 0.0006 of a milligram per gram of frog will cause tetanus at all temperatures between 5° C. and 30° C., although at low temperatures the tetanus may appear late. A dose of 0.0003 of a milligram per gram of frog will frequently produce tetanus at 5° C. as well as at 30° or 27° C., but may nevertheless fail to produce any reaction at such an intermediary temperature as 21° C. Smaller doses, 0.0002 of a milligram per gram, will cause tetanus in the cold but not at high temperatures. It may be stated in general that in frogs kept at low temperatures the tetanic state sets in later, continues longer, and each tetanic attack is of longer duration, while in the interval between the attacks the state of tonus is higher and the animals are more irritable than when they are kept at higher temperatures.

scholarly journals Temperature dependence of the indentation size effect

2010 ◽  
Vol 25 (7) ◽  
pp. 1225-1229 ◽  
Author(s):  
Oliver Franke ◽  
Jonathan C. Trenkle ◽  
Christopher A. Schuh
Keyword(s):  
High Temperature ◽  
Size Effect ◽  
Temperature Dependence ◽  
Thermal Activation ◽  
Indentation Size Effect ◽  
Inert Atmosphere ◽  
Length Scale ◽  
Indentation Size ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

The influence of temperature on the indentation size effect is explored experimentally. Copper is indented on a custom-built high-temperature nanoindenter at temperatures between ambient and 200 °C, in an inert atmosphere that precludes oxidation. Over this range of temperatures, the size effect is reduced considerably, suggesting that thermal activation plays a major role in determining the length scale for plasticity.

Versuche über den Zeitmeßvorgang bei der photoperiodischen Diapause-Induktion von Pieris brassicae

1962 ◽  
Vol 17 (1) ◽  
pp. 57-61 ◽  
Author(s):  
Erwin Bünning ◽  
Gabriele Joerrens
Keyword(s):  
Significant Influence ◽  
Pieris Brassicae ◽  
Light Period ◽  
Diapause Induction ◽  
Corpora Allata ◽  
Physiological Status ◽  
Diurnal Changes ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Photoperiodic Diapause

With three different methods no significant influence of temperature on the timing process in photoperiodic diapause induction of Pieris brassicae was detectable. Between 15 and 21°C the physiological status in which light strongly inhibits diapause is always reached about 14 -16 hours after the beginning of the daily light period.The diurnal changes in responsiveness to light correspond to diurnal changes in the volume of the corpora allata.

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