scholarly journals Origin of the May 1998 suprathermal particles: Solar and Heliospheric Observatory/Charge, Element, and Isotope Analysis System/(Highly) Suprathermal Time of Flight results

2002 ◽  
Vol 107 (A7) ◽  
Author(s):  
K. Bamert
Keyword(s):  
Isotope Analysis ◽  
Time Of Flight ◽  
Heliospheric Observatory ◽  
Analysis System ◽  
Suprathermal Particles

CELIAS — Charge, Element and Isotope Analysis System for SOHO

1995 ◽  
pp. 441-481 ◽  
Author(s):  
D. Hovestadt ◽  
M. Hilchenbach ◽  
A. Bürgi ◽  
B. Klecker ◽  
P. Laeverenz ◽  
...  
Keyword(s):  
Isotope Analysis ◽  
Analysis System

CELIAS - Charge, Element and Isotope Analysis System for SOHO

Solar Physics ◽  
1995 ◽  
Vol 162 (1-2) ◽  
pp. 441-481 ◽  
Author(s):  
D. Hovestadt ◽  
M. Hilchenbach ◽  
A. B�rgi ◽  
B. Klecker ◽  
P. Laeverenz ◽  
...  
Keyword(s):  
Isotope Analysis ◽  
Analysis System

A novel gas analysis system for metallurgical materials based on time-of-flight mass spectrometry

2010 ◽  
Vol 294 (2-3) ◽  
pp. 77-82 ◽  
Author(s):  
Wei Gao ◽  
Zhengxu Huang ◽  
Huiqing Nian ◽  
Xuejing Shen ◽  
Peng Wang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Time Of Flight ◽  
Gas Analysis ◽  
Flight Mass Spectrometry ◽  
Analysis System

Direct isotope analysis of Chernobyl microparticles using time-of-flight mass spectrometry with pulsed glow discharge

2017 ◽  
Vol 132 ◽  
pp. 286-292 ◽  
Author(s):  
Aleksander Ganeev ◽  
Anna Gubal ◽  
Boris Korotetski ◽  
Oksana Bogdanova ◽  
Boris Burakov ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Glow Discharge ◽  
Isotope Analysis ◽  
Time Of Flight ◽  
Pulsed Glow Discharge ◽  
Flight Mass Spectrometry

scholarly journals A High-Volume Cryosampler and Sample Purification System for Bromine Isotope Studies of Methyl Bromide*

2013 ◽  
Vol 30 (9) ◽  
pp. 2095-2107 ◽  
Author(s):  
Brett F. Thornton ◽  
Axel Horst ◽  
Daniel Carrizo ◽  
Henry Holmstrand ◽  
Per Andersson ◽  
...  
Keyword(s):  
Isotope Fractionation ◽  
Packed Column ◽  
Isotope Analysis ◽  
Operation Time ◽  
Ambient Atmosphere ◽  
Entire System ◽  
Purification System ◽  
Two Samples ◽  
Sample Purification ◽  
Analysis System

Abstract A system was developed for collecting from the ambient atmosphere the methyl halides CH3Cl and CH3Br in quantities sufficient for chlorine and bromine isotope analysis. The construction and operation of the novel cryogenic collection system (cryosampler) and sample purification system developed for this task are described. This study demonstrates the capability of the cryosampler by quantifying the CH3Cl and CH3Br collected from atmospheric samples and the nonfractionating bromine isotope fingerprint of CH3Br from synthetic air samples of controlled composition. An optimized cryosampler operation time of 4 h at a flow rate of 15 L min−1 is applied to yield the nearly 40 ng required for subsequent δ81Br-CH3Br analyses. The sample purification system is designed around a packed column gas chromatography–quadropole–mass spectrometry (GCqMS) system with three additional cryotraps and backflushing capacity. The system's suitability was tested by observing both the mass recovery and the lack of Δ81Br isotope fractionation induced during sample purification under varying flow rates and loading scenarios. To demonstrate that the entire system samples and dependably delivers CH3Br to the isotope analysis system without inducing isotope fractionation, diluted synthetic air mixtures prepared from standard gases were processed through the entire system, yielding a Δ81Br-CH3Br of +0.03‰ ± 0.10‰ relative to their starting composition. Finally, the combined cryosampler–purification and analysis system was applied to demonstrate the first-ever δ81Br-CH3Br in the ambient atmosphere with two samples collected in the autumn of 2011, yielding −0.08‰ ± 0.43‰ and +1.75‰ ± 0.13‰ versus standard mean ocean bromide for samples collected at a suburban Stockholm, Sweden, site.

The charge, element, and isotope analysis system CELIAS on SOHO

2008 ◽  
pp. 271-278
Author(s):  
D. Hovestadt ◽  
P. Bochsler ◽  
H. Grünwaldt ◽  
F. Gliem ◽  
M. Hilchenbach ◽  
...  
Keyword(s):  
Isotope Analysis ◽  
Analysis System

Automated Image Analysis Of Nuclear And Cytoplasmic Changes In Exfoliated Cells From Tracheas Treated With Carcinogen

1977 ◽  
Vol 35 ◽  
pp. 220-221
Author(s):  
S.F. Stinson ◽  
J.C. Lilga ◽  
M.B. Sporn
Keyword(s):  
Image Analysis ◽  
Pattern Analysis ◽  
Relative Proportion ◽  
Automated Image Analysis ◽  
Image Analyzer ◽  
Cross Sectional ◽  
Exfoliated Cells ◽  
Neoplastic Lesions ◽  
Analysis System ◽  
Morphologic Criterion

Increased nuclear size, resulting in an increase in the relative proportion of nuclear to cytoplasmic sizes, is an important morphologic criterion for the evaluation of neoplastic and pre-neoplastic cells. This paper describes investigations into the suitability of automated image analysis for quantitating changes in nuclear and cytoplasmic cross-sectional areas in exfoliated cells from tracheas treated with carcinogen.Neoplastic and pre-neoplastic lesions were induced in the tracheas of Syrian hamsters with the carcinogen N-methyl-N-nitrosourea. Cytology samples were collected intra-tracheally with a specially designed catheter (1) and stained by a modified Papanicolaou technique. Three cytology specimens were selected from animals with normal tracheas, 3 from animals with dysplastic changes, and 3 from animals with epidermoid carcinoma. One hundred randomly selected cells on each slide were analyzed with a Bausch and Lomb Pattern Analysis System automated image analyzer.

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