Results 11 to 20 of about 62,388 (262)

Market Survey of Modern Oral Nicotine Products: Determination of Select HPHCs and Comparison to Traditional Smokeless Tobacco Products

open access: yesSeparations, 2022
In an effort to combat the risks associated with traditional tobacco products, tobacco product innovation has been redirected towards reducing the consumer’s potential exposure to harmful or potentially harmful constituents (HPHCs).
Joseph J. Jablonski   +2 more
doaj   +1 more source

Drying kinetics and thermodynamic properties of ‘baru’ almond flours [PDF]

open access: yesRevista Brasileira de Engenharia Agrícola e Ambiental, 2020
The consumption of flour and oil of ‘baru’ (Dipteryx alata Vogel) has increased due to its nutritional characteristics; however, there are few studies on the processing of the flour of this almond.
Niedja M. C. Alves   +5 more
doaj   +1 more source

An open carbon–phenolic ablator for scientific exploration

open access: yesScientific Reports, 2023
Space exploration missions rely on ablative heat shields for the thermal protection of spacecraft during atmospheric entry flights. While dedicated research is needed for future missions, the scientific community has limited access to ablative materials ...
Erik Poloni   +10 more
doaj   +1 more source

Novel heat flux controlled surface cooling for hypersonic flight

open access: yesScientific Reports, 2023
This paper presents a new method in theory and experiment to adjust the transpiration cooling based on the actual measured heat flux. This is particularly useful in extreme heating environments, e.g.
Fabian Hufgard   +3 more
doaj   +1 more source

Thermodynamics of solid and liquid aluminium

open access: yesЛитьë и металлургия, 2021
Based on thermodynamic calculations, it is shown that in the temperature range of 298–1273 K, heating and cooling of aluminum are thermodynamically equilibrium processes.
E. I. Marukovich   +2 more
doaj   +1 more source

Investigation of nozzle flow in high altitude test facility

open access: yesAdvances in Mechanical Engineering, 2022
A high altitude test facility was developed for the experimental studies on nozzles for various levels of vacuum. The current study is focused on the performance of the nozzle under various altitude condition and to characterized the high altitude test ...
Kavin Prashana ANL   +2 more
doaj   +1 more source

Kinetics and mechanism of the oxidation of some substituted aldonitrones by quinolinium chlorochromate in aqueous DMF medium in the absence and presence of oxalic acid [PDF]

open access: yesJournal of the Serbian Chemical Society, 2009
The kinetics of the oxidation of aldonitrones (nitrone) by quinolinium chlorochromate (QCC) was determined in 50 % DMF-water in the absence and presence of oxalic acid in order to study the effect of oxalic acid.
Rajarajan Govindasamy   +4 more
doaj   +3 more sources

Biothermodynamics of Viruses from Absolute Zero (1950) to Virothermodynamics (2022)

open access: yesVaccines, 2022
Biothermodynamics of viruses is among the youngest but most rapidly developing scientific disciplines. During the COVID-19 pandemic, it closely followed the results published by molecular biologists.
Marko Popovic
doaj   +1 more source

Environmental and Qualitative Monitoring of a Transoceanic Intermodal Transport of Melons

open access: yesAgronomy, 2022
To supply the off-season melon market, Europe imports from distant markets in other countries, mainly Brazil. Cold transportation takes at least 15–20 days, thus increasing the risk of quality losses.
Eva Cristina Correa   +6 more
doaj   +1 more source

Short-Term Temperature Response of Leaf Respiration in Different Subtropical Urban Tree Species

open access: yesFrontiers in Plant Science, 2021
Plant leaf respiration is one of the critical components of the carbon cycle in terrestrial ecosystems. To predict changes of carbon emissions from leaves to the atmosphere under a warming climate, it is, therefore, important to understand the ...
Man Xu   +4 more
doaj   +1 more source

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