scholarly journals Research on water interconnections within the Sar Mountains aquatorium by radioactive hydrogen isotope tritium

2019 ◽  
Vol 34 (4) ◽  
pp. 392-398
Author(s):  
Nenad Stanojevic ◽  
Jelena Djokic ◽  
Predrag Osmokrovic
Keyword(s):  
Ambient Temperature ◽  
Soil Profile ◽  
Hydrogen Isotope ◽  
Temperature Conditions ◽  
Seasonal Maximum ◽  
Major Transformation

The waters of two lakes and two streams that dominate in the Sar Mountains aquatorium were analyzed. The tritium profile of soil was also recorded. All samples were taken at approximately the same time, together with samples of precipitation. During the period of taking samples, the ambient temperature conditions were taken into account for ten days around the time of sampling. Monitoring of the seasonal maximum with taking into account the obtained tritium soil profile and the temperature on and around the day of sampling unambiguously showed that all tested water in the Sar Mountains aquatorium is of atmospheric origin and as such unsuitable for any major transformation for commercial purposes.

Design and Fabrication of a Magnetocaloric Microcooler

2005 ◽  
Author(s):  
Sangchae Kim ◽  
Bharath Bethala ◽  
Simone Ghirlanda ◽  
Senthil N. Sambandam ◽  
Shekhar Bhansali
Keyword(s):  
Magnetic Field ◽  
Ambient Temperature ◽  
Temperature Change ◽  
Entropy Change ◽  
Temperature Sensors ◽  
Experimental Results ◽  
Maximum Temperature ◽  
Alternative Technology ◽  
Temperature Conditions ◽  
Si Wafer

Magnetocaloric refrigeration is increasingly being explored as an alternative technology for cooling. This paper presents the design and fabrication of a micromachined magnetocaloric cooler. The cooler consists of fluidic microchannels (in a Si wafer), diffused temperature sensors, and a Gd5(Si2Ge2) magnetocaloric refrigeration element. A magnetic field of 1.5 T is applied using an electromagnet to change the entropy of the magnetocaloric element for different ambient temperature conditions ranging from 258 K to 280 K, and the results are discussed. The tests show a maximum temperature change of 7 K on the magnetocaloric element at 258 K. The experimental results co-relate well with the entropy change of the material.

Analysis of Micro-Explosion Phenomenon in a Constant Volume Chamber by Butanol-Biodiesel-Diesel Blend Fuel

2012 ◽  
Vol 443-444 ◽  
pp. 996-1006 ◽  
Author(s):  
Yu Liu ◽  
Jun Li ◽  
Ying Gao ◽  
Xin Mei Yuan
Keyword(s):  
Ambient Temperature ◽  
High Speed ◽  
Fuel Injection ◽  
Combustion Process ◽  
Constant Volume ◽  
Liquid Jet ◽  
Penetration Length ◽  
Temperature Conditions ◽  
Constant Volume Chamber ◽  
Jet Penetration

Different blend ratio of ternary component fuel was tested inside a constant volume chamber to investigate fuel injection and combustion under similar real engine working conditions. Because liquid spray light scattering is the different reflective rate from the liquid droplets and its surrounding background, butanol-biodiesel-diesel liquid jet penetration length can be highlighted in the images taken by high speed camera. Various ambient temperatures from 800K to 1200K and fuel composition were investigated. Measured results showed that sudden but repeatable drop of liquid jet penetration length at constant ambient temperature conditions of 800K and 900K. With ambient temperature increasing, this phenomenon became weak and disappeared. So more works focus on non-combusting experiments in order to delete combustion reflect. With butanol and biodiesel content increasing, micro explosion becomes prone excited and more violent because of the enlarged differences in volatilities and boiling point among the components. It is concluded that micro explosion which will distinctly enhances premixed combustion process and heat release rate but it present under certain initial ambient temperature conditions only and the light fuel content shouldn’t be lower than 10%.

Seawater based mixed methane-THF hydrate formation at ambient temperature conditions

2020 ◽  
Vol 271 ◽  
pp. 115158
Author(s):  
Gaurav Bhattacharjee ◽  
Hari Prakash Veluswamy ◽  
Rajnish Kumar ◽  
Praveen Linga
Keyword(s):  
Ambient Temperature ◽  
Hydrate Formation ◽  
Temperature Conditions

scholarly journals Ultrafast amidation of esters using lithium amides under aerobic ambient temperature conditions in sustainable solvents

2020 ◽  
Vol 11 (25) ◽  
pp. 6500-6509 ◽  
Author(s):  
Michael Fairley ◽  
Leonie J. Bole ◽  
Florian F. Mulks ◽  
Laura Main ◽  
Alan R. Kennedy ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Organometallic Chemistry ◽  
Room Temperature ◽  
Temperature Conditions ◽  
Lithium Amides ◽  
Sustainable Solvents

Using 2-methyl THF as solvent enables efficient and ultrafast amidation of esters by lithium amides at room temperature in air, edging closer towards reaching air- and moisture-compatible polar organometallic chemistry.

Failure Investigation of Cold-Rolled ZnTiCu Alloy Fracture During Bending Under Ambient Temperature Conditions

2013 ◽  
Vol 13 (6) ◽  
pp. 757-764 ◽  
Author(s):  
George Pantazopoulos ◽  
Athanasios Vazdirvanidis ◽  
Andreas Rikos ◽  
Anagnostis Toulfatzis
Keyword(s):  
Ambient Temperature ◽  
Temperature Conditions ◽  
Failure Investigation ◽  
Cold Rolled

scholarly journals Exploiting Deep Eutectic Solvents and Organolithium Reagent Partnerships: Chemoselective Ultrafast Addition to Imines and Quinolines Under Aerobic Ambient Temperature Conditions

2016 ◽  
Vol 128 (52) ◽  
pp. 16379-16382 ◽  
Author(s):  
Cristian Vidal ◽  
Joaquín García-Álvarez ◽  
Alberto Hernán-Gómez ◽  
Alan R. Kennedy ◽  
Eva Hevia
Keyword(s):  
Ambient Temperature ◽  
Deep Eutectic Solvents ◽  
Temperature Conditions ◽  
Organolithium Reagent

scholarly journals Effect of hatching date, vertical distribution, and interannual variation in physical forcing on northward displacement and temperature conditions of Norwegian spring-spawning herring larvae

2010 ◽  
Vol 67 (9) ◽  
pp. 1948-1956 ◽  
Author(s):  
Frode B. Vikebø ◽  
Åse Husebø ◽  
Aril Slotte ◽  
Erling Kåre Stenevik ◽  
Vidar S. Lien
Keyword(s):  
Vertical Distribution ◽  
Ambient Temperature ◽  
Interannual Variation ◽  
Barents Sea ◽  
Clupea Harengus ◽  
Coastal Current ◽  
Hatching Date ◽  
Physical Forcing ◽  
Larval Drift ◽  
Temperature Conditions

Abstract Vikebø, F. B., Husebø, Å., Slotte, A., Stenevik, E. K., and Lien, V. S. 2010. Effect of hatching date, vertical distribution, and interannual variation in physical forcing on northward displacement and temperature conditions of Norwegian spring-spawning herring larvae. – ICES Journal of Marine Science, 67: 1948–1956. Early hatching has been shown to be associated with increased survival of Norwegian spring-spawning herring (Clupea harengus) larvae. We investigated whether the process behind this association is related to larval drift and ambient temperature. A three-dimensional hydrodynamic model was used to simulate the effect of hatching date on northward displacement and temperature conditions of larvae from spawning grounds off western Norway for 1989–2008. The simulations revealed that the displacement during a period of 60 d was greatest if the larvae hatched early in the season and if they were located near the surface. The relationship between drift speed and ambient temperature was significantly negative, but less so later in the season, because the coastal current became progressively warmer. Results from the simulated interannual variations in larval drift compared with the observed survival suggest that a rapid northward displacement to the main nursery area in the Barents Sea is more important for larval survival than ambient temperature. The significant effect of northward displacement on survival could be explained by reduced overlap with predators and/or higher prey densities, but the causal processes involved remain to be investigated.

Does the temperature response of rest break of woody plants change during the development?

1988 ◽  
Vol 18 (2) ◽  
pp. 269-271 ◽  
Author(s):  
Heikki Hänninen ◽  
Paavo Pelkonen
Keyword(s):  
Ambient Temperature ◽  
Preliminary Data ◽  
Woody Plants ◽  
Temperature Response ◽  
Breaking Effect ◽  
Temperature Conditions ◽  
Rest Break ◽  
Breaking Mechanism

Preliminary data concerning rest break of buds of 2-year-old seedlings of Pinussylvestris L. and Piceaabies (L.) Karst suggested that (i) an ambient, temperature of 12 °C has a slight rest breaking effect, and (ii) the ability of the rest breaking mechanism to respond to 12 °C is gradually lost when the seedlings are first chilled near 0 °C. This change in the response is interpreted to represent the acclimation of the seedlings to prevailing temperature conditions. A very long forcing period is required to obtain the pattern found by us.

scholarly journals Evaluation of coatings for application in raffia big bags in conditioned storage of soybean cultivars in seed processing units

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242522
Author(s):  
Paulo Carteri Coradi ◽  
Roney Eloy Lima ◽  
Charline Zaratin Alves ◽  
Paulo Eduardo Teodoro ◽  
Ana Carina da Silva Cândido
Keyword(s):  
Ambient Temperature ◽  
Storage Temperature ◽  
Cumulative Effect ◽  
Soybean Seeds ◽  
Storage Duration ◽  
Soybean Cultivars ◽  
Temperature Conditions ◽  
Seed Processing ◽  
Physiological Quality

Different regions have different environmental conditions, which may be unfavorable for the preservation of the quality of stored soybean seeds over time. Thus, it is necessary to adopt specific technologies to control the storage environment conditions. Big raffia bags are widely used for the storage of soybean seeds, however these consist of a porous, permeable material that allows the exchange of gases between the packaging and the storage environment. In an effort to find a solution to this problem, in this study we evaluated low cost big bag coating alternatives, in order to minimize the effects of temperature and intergranular humidity on stored seeds. Thus, the aim of this work was to evaluate the quality of soybean cultivars subjected to different temperature and storage duration conditions and stored in raffia bags with or without internal coating. We used a completely randomized, three-factor (10 × 6 × 5) experimental design. We assessed 10 soybean cultivars, six storage environments, and five evaluation periods. Our results showed that seeds of the M-SOY 8866, M7110 IPRO, CD 2737 RR, and BMX DESAFIO 8473 RSF soybean cultivars preserved their physiological quality better in different storage environments. The storage duration had a cumulative effect on the negative factors that favor the deterioration of the quality of the stored seeds. The storage temperature was the main factor that affected the physiological quality of the stored seeds. The use of coated packaging was beneficial in preserving the physiological quality of stored soybean seeds; however, its effect was greater at ambient temperature than in a cold environment. The best storage environment for the preservation of the quality of the seeds was characterized by 10°C temperature conditions and the use of coated packaging, while the worst storage environment was characterized by ambient temperature conditions without the use of coated packaging. Thus, it was concluded that the use of coatings in raffia big bags can be an alternative for maintaining the quality of seeds of different soybean cultivars during storage in seed processing units.

Design Flexibility Permits a 35000 HP Industrial Gas Turbine to Meet a Wide Range of Application Requirements

1983 ◽  
Author(s):  
P. W. Kuly
Keyword(s):  
Ambient Temperature ◽  
Gas Turbine ◽  
Gas Flow ◽  
Steam Injection ◽  
High Ambient Temperature ◽  
Engine Operation ◽  
Temperature Conditions ◽  
Exhaust Heat ◽  
Wide Range ◽  
Industrial Gas Turbine

Two recent applications for a heavy duty industrial gas turbine engine are discussed. The principal design requirements for both cases are compared and the design changes necessary to meet the requirements are illustrated. In the case of a main pipeline compressor driver, the need for high thermal efficiency over a wide range of loads is met by use of a regenerative cycle and by reprogramming the loading sequence. Long term step increases in engine capability were provided by incorporating a unique engine convertability feature. In the case of a process air compressor driver with exhaust heat recovery, the engine exhaust temperature and gas flow imposed constraints on engine capability during high ambient temperature operation and on engine operation at low ambient temperature conditions. The constraints were met by the use of steam injection to augment power at high ambient temperature conditions and by the use of variable inlet guide vanes to control exhaust flow at the low temperatures.

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