Results 131 to 140 of about 55,918 (290)

Physiology of nitrogen: A life or death matter

open access: yesExperimental Physiology, Volume 111, Issue 1, Page 270-282, 1 January 2026.
Abstract With each breath, four out of every five molecules we inspire are nitrogen (N2), since this gas constitutes ∼80% of the atmospheric air that surrounds us. Despite its abundance and unlike molecular oxygen, N2 has traditionally held less appeal among physiologists given its lack of reactivity and corresponding inability to support combustion or
Damian M. Bailey   +2 more
wiley   +1 more source

Studies of the chemistry of vibrationally and electronically excited species in planetary upper atmospheres [PDF]

open access: yes
The vibrational distribution of O2(+) in the atmospheres of Venus and Mars was investigated to compare with analogous values in the Earth's atmosphere. The dipole moment of the Z(2) Pi sub u - X(2) Pi sub g transition of O2(+) is calculated as a function
Fox, J. L.
core   +1 more source

A Review of On‐Site Detection Methods for Plant Health Based on Electrical Characteristics

open access: yesJournal of Sensors, Volume 2026, Issue 1, 2026.
Recent developments in IoT technology provide new solutions for field‐based monitoring of plant health. Among the many rapid detection techniques applied to the perception layer of IoT, electrical feature‐based detection technology stands out due to its distinct advantages such as low cost, ability to extract internal plant information, and immunity to
Jian Sun   +9 more
wiley   +1 more source

Methane measurement by the Pioneer Venus large probe neutral mass spectrometer [PDF]

open access: yes
The Pioneer Venus Large Probe Mass Spectrometer detected a large quantity of methane as it descended below 20 km in the atmosphere of Venus. Terrestrial methane and Xe-136, both originating in the same container and flowing through the same plumbing ...
Donahue, T. M., Hodges, R. R., Jr.
core   +1 more source

Frequency Channel Selection and Performance Simulation of a Microwave Radiometer for Temperature and Sulfuric Compound Profiling of the Venusian Lower Atmosphere

open access: yesEarth and Space Science
Exploring the Venusian lower atmosphere is crucial for studying the atmospheric circulation, surface‐atmosphere interactions, and origin and evolution of the Venusian atmosphere and climate. In this study, we investigate the theoretical capabilities of a
Zijin Zhang   +4 more
doaj   +1 more source

Mass spectrometric determination of the composition of the Venus clouds [PDF]

open access: yes
The instrumentation is analyzed for determining the composition of the clouds on Venus. Direct analysis of the gas phase atmosphere, and the detection of ferrous chloride with a mass spectrometer are dicussed along with the mass analyzer, and the pre ...
Herzog, R. F. K.
core   +1 more source

An analysis of atmospheric entry trajectories for manned and unmanned missions to the planet Venus [PDF]

open access: yes
A unified atmospheric density model is presented for the planet Venus, and this model is compatible with Russian and American data obtained during the 1967 Venus launch opportunity.
Craig, M. K., Gonzalez, R. G.
core   +1 more source

Spectroscopic Study of Solar and Planetary Atmospheres Semiannual Status Report No. 6, Aug. 1, 1965 - Feb. 1, 1966 [PDF]

open access: yes
Spectroscopic study of solar and planetary atmospheres - observations of Venus and Jupiter, and analysis of simulated Martian atmosphere in visible and infrared ...
Heyden, F. J.
core   +1 more source

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