Results 271 to 280 of about 1,320,406 (342)

Intraoperative Mass Spectrometry in Oncology: Technologies, Clinical Applications, and Challenges. [PDF]

Molecules
Onulov R, Georgescu M, Flangea C, Chirita-Emandi A, Serb AF.   +4 more
europepmc   +1 more source

A preliminary experiment to verify the relationship between radon and atmospheric electric conductivity related to earthquake precursors. [PDF]

Sci Rep
Du X, Wang Z, Zhu G, Huang R, Zhang X, Fu S, Xu X, Zhou C.   +7 more
europepmc   +1 more source

Numerical simulation of the microscopic discharge processes in SF₆/N₂ mixtures: Effects of gas composition, voltage, and electric field distribution. [PDF]

Sci Rep
Wang Y, Zhao R, Niu H, Fan X, Zhang Z, Ma L.   +5 more
europepmc   +1 more source

Experimental and Computational Investigation of Sulfur Chemistry in the DART-MS Gas Stream: Implications for the Interpretation of the Mass Spectra of Organic Disulfides. [PDF]

J Am Soc Mass Spectrom
Garosi B, Arathala P, Musah RA.
europepmc   +1 more source

Sterol analysis in cancer cells using atmospheric pressure ionization techniques. [PDF]

Anal Bioanal Chem
Wittenhofer P, Ayala-Cabrera JF, Orell L, Uteschil F, Meckelmann SW, Schmitz OJ.   +5 more
europepmc   +1 more source

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The Ionization Mechanisms in Direct and Dopant-Assisted Atmospheric Pressure Photoionization and Atmospheric Pressure Laser Ionization

Journal of the American Society for Mass Spectrometry, 2014
A novel, gas-tight API interface for gas chromatography-mass spectrometry was used to study the ionization mechanism in direct and dopant-assisted atmospheric pressure photoionization (APPI) and atmospheric pressure laser ionization (APLI). Eight analytes (ethylbenzene, bromobenzene, naphthalene, anthracene, benzaldehyde, pyridine, quinolone, and ...
Tiina J Kauppila, Hendrik Kersten, Thorsten Benter   +2 more
exaly   +3 more sources

Atmospheric pressure chemical ionization in gas chromatography-mass spectrometry for the analysis of persistent organic pollutants

Trends in Environmental Analytical Chemistry, 2020
Atmospheric pressure chemical ionization (APCI) was primarily applied as the ion source for liquid chromatography-mass spectrometry (LC–MS). While APCI started to be used in gas chromatography-mass spectrometry (GC–MS) in 1970s, GC-APCI-MS was not widely
Jing Fang, Hongzhi Zhao, Yanhao Zhang, Minghua Lu, Z. Cai   +4 more
semanticscholar   +1 more source

Assessing Relative Electrospray Ionization, Atmospheric Pressure Photoionization, Atmospheric Pressure Chemical Ionization, and Atmospheric Pressure Photo- and Chemical Ionization Efficiencies in Mass Spectrometry Petroleomic Analysis via Pools and Pairs of Selected Polar Compound Standards

Energy & Fuels, 2016
A total of 15 standard compounds with structures similar to those normally found in crude oils were analyzed using an ultrahigh-resolution and high-accuracy Fourier transform ion cyclotron resonance (7.2 T LTQ FT Ultra, Thermo Fisher, Bremen, Germany ...
Marcos A Pudenzi, Marcos N Eberlin
exaly   +2 more sources

Compact cosmic ray detector for unattended atmospheric ionization monitoring.

Review of Scientific Instruments, 2010
Two vertical cosmic ray telescopes for atmospheric cosmic ray ionization event detection are compared. Counter A, designed for low power remote use, was deployed in the Welsh mountains; its event rate increased with altitude as expected from ...
K. Aplin, R. Harrison
semanticscholar   +2 more sources

Ionization of tocopherols and tocotrienols in atmospheric pressure chemical ionization

Rapid Communications in Mass Spectrometry, 2018
Rationale Tocopherols and tocotrienols are chemical compounds insusceptible to the ionization process under atmospheric pressure conditions. Therefore, the selection of the optimal ion source settings for their quantification requires special attention.
Ewa Bartosińska, Agnieszka Borsuk‐De Moor, Danuta Siluk, Michał J. Markuszewski, Paweł Wiczling   +4 more
openaire   +2 more sources