Results 1 to 10 of about 317,407 (342)

Emission of some rare gases at the Los Azufres, Mexico, geothermal reservoir [PDF]

open access: yesGeofísica Internacional, 2002
The chemistry of fluids in the Los Azufres, Mexico geothermal field originated from volcanic processes and is controlled by temperatures at depth, mineral solubility, pH values and mineral equilibrium.
Mario César Suárez Arriaga
doaj  

Argon–Helium Cryoablation for Cutaneous Squamous Cell Carcinoma in the Elderly

open access: yesFrontiers in Oncology, 2022
Cutaneous squamous cell carcinoma (cSCC) is a common type of malignant neoplasm in non-melanoma skin cancer (NMSC). Most cases of simple cSCC are considered curable by surgical removal of the lesion.
Qianwen Huang, Wenshen Xu
doaj   +1 more source

Economics, Helium, and the U.S. Federal Helium Reserve: Summary and Outlook

open access: yesNatural Resources Research, 2018
In 2017, disruptions in the global supply of helium reminded consumers, distributors, and policy makers that the global helium supply chain lacks flexibility, and that attempts to increase production from the U.S. Federal Helium Reserve (the FHR) may not
Steven T. Anderson
semanticscholar   +1 more source

Hybrid integrated circuits for sound signal processing

open access: yesТехнологія та конструювання в електронній апаратурі, 2011
Developed hybrid integrated circuit with rated supply voltage of 1,4 V, current consumption 0,7 mA and overall dimensions 8×4×3 mm provides soft processing of the audio signal in analog microelectronic equipment.
V. A. Koval’chuk, V. V. Sevast’yanov
doaj  

Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station.

open access: yesPhysical Review Letters, 2015
Knowledge of the precise rigidity dependence of the helium flux is important in understanding the origin, acceleration, and propagation of cosmic rays. A precise measurement of the helium flux in primary cosmic rays with rigidity (momentum/charge) from 1.
M. Aguilar   +299 more
semanticscholar   +1 more source

Advantages and disadvantages of substitution of helium as carrier gas in gas chromatography by hydrogen. Part II. - Retention time and selectivity.

open access: yesKvasný průmysl, 2013
Gas chromatography often uses helium, hydrogen, and nitrogen as carrier gases. The most common carrier gas is helium since it provides good separations, is inert, and is safe to use.
Tomáš HORÁK   +3 more
doaj   +1 more source

Comparison of Geogases in Two Cenozoic Sedimentary Basins

open access: yesGeosciences, 2022
We investigated fault gases (helium, radon, CO2) in two seismically active Cenozoic sedimentary basins: (a) Meinweg (in 2015), at a tectonically quiescent horst structure in the Lower Rhine Embayment; and (b) Bodanrück (in 2012; Lake of Constance), in ...
Gabriele M. Berberich   +1 more
doaj   +1 more source

Nanopore fabrication and characterization by helium ion microscopy [PDF]

open access: yes, 2016
The Helium Ion Microscope (HIM) has the capability to image small features with a resolution down to 0.35 nm due to its highly focused gas field ionization source and its small beam-sample interaction volume.
Daniel Emmrich   +6 more
semanticscholar   +1 more source

Vaux-en-Bugey (Ain, France): the first gas field produced in France, providing learning lessons for natural hydrogen in the sub-surface?

open access: yesBSGF - Earth Sciences Bulletin, 2020
The former Vaux-en-Bugey field, first French methane production from early 20th century, is revisited as a case study to address the present generation and accumulation theories for gases like hydrogen and helium.
Deronzier Jean-François   +1 more
doaj   +1 more source

Observation of the Efimov state of the helium trimer [PDF]

open access: yesScience, 2015
We report experimental observation of the long predicted but experimentally elusive Efimov state of 4He trimer by means of Coulomb explosion imaging. We show spatial images of an Efimov state, confirming the predicted size and a typical structure where ...
M. Kunitski   +11 more
semanticscholar   +1 more source

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