Results 91 to 100 of about 506,032 (344)

From soft ionization mass spectrometry to “chemical bond” and resistance, semiconductor, superconductivity -- the law of charge motion in phase transition under weak electric field part Ⅱ [PDF]

, 2023
Jiehong Luo
openalex   +1 more source

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Desorption chemical ionization mass spectrometry of 1-O-alkyl-2-O-acetyl-sn-glycero-3-phosphocholines and analogues.

Journal of Lipid Research, 1986
Ammonia desorption chemical ionization of ether-linked phospholipids of the type 1-O-alkyl-2-O-acetyl-sn-glycero-3-phosphocholine (platelet-activating factors) and a series of analogues revealed a systematic fragmentation pattern that is characteristic ...
M J Thomas, M Samuel, R L Wykle, J R Surles, C Piantadosi   +4 more
doaj   +1 more source

Author response for "Distinguishing between Isomeric Neoxanthin and Violaxanthin Esters in Yellow Flower Petals using Liquid Chromatography–Photodiode Array Atmospheric Pressure Chemical Ionization Mass Spectrometry and MS/MS"

, 2021
Takehiro Watanabe, Tohru Yamagaki, Toshiaki Azuma, Manabu Horikawa   +3 more
openalex   +1 more source

Dielectric Barrier Discharge Plasma Deoxidation of Natively Oxide Layer of Copper Powders in a Fluidized Bed

Advanced Engineering Materials, EarlyView.
This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang, Annett Wollmann, Thomas Gimpel, Alfred P. Weber   +3 more
wiley   +1 more source

Precision Measurements of Ionization and Dissociation Energies by Extrapolation of Rydberg Series: From H2 to Larger Molecules

CHIMIA, 2013
Recent experiments are reviewed which have led to the determination of the ionization and dissociation energies of molecular hydrogen with a precision of 0.0007 cm–1 (8 mJ/mol or 20 MHz) using a procedure based on high-resolution spectroscopic ...
D. Sprecher, M. Beyer, F. Merkt
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Evidence of Enhanced Ionization in Protostellar Envelopes

The Astronomical Journal
Ionization is a major driver of both physical and chemical evolution in protostellar systems. Recent observations reveal substantial chemical processing in protoplanetary disks by the time the surrounding envelope has cleared.
K. R. Schwarz, S. Maret, M. R. A. Wells, C. Gieser, A. Belloche, P. Andre, C. Codella   +6 more
doaj   +1 more source

Analysis of platelet-activating factor by GC-MS after direct derivatization with pentafluorobenzoyl chloride and heptafluorobutyric anhydride.

Journal of Lipid Research, 1990
Parallel analysis of platelet-activating factor (PAF) using chemical ionization gas chromatography-mass spectrometry after direct derivatization with pentafluorobenzoyl chloride (PFB) and heptafluorobutyric anhydride (HFB) provides a facile and highly ...
ST Weintraub, CS Lear, RN Pinckard
doaj   +1 more source

Cosmic rays and the primordial gas

, 2007
One of the most outstanding problems in the gravitational collapse scenario of early structure formation is the cooling of primordial gas to allow for small mass objects to form.
Abel, Abel, Aldrovandi, Bakker, Benedetta Ciardi, Biermann, Black, Cen, Cen, Ciardi, Dalgarno, De Jong, Diehl, Donahue, Dove, Enßlin, Galli, Ginzburg, Glover, Gould, Groom, Haiman, Haiman, Hartquist, Heitler, Hirata, Janev, Jasche, Jens Jasche, Karpas, Mannheim, Martin, Miniati, Oneil, Osterbrock, Osterbrock, Peebles, Peskin, Pfrommer, Ripamonti, Roberge, Shapiro, Shchekinov, Shull, Smith, Smith, Spitzer, Spitzer, Stanev, Sternheimer, Tegmark, Thielens, Torsten A. Enßlin, Weiss, Whaling, Wise, Yousif, Ziegler   +57 more
core   +2 more sources