482 research outputs found
The Method of Ion Mobility TOF Mass Spectrometry for Rapid Identification of Triphenylmethane Ball Point Pen Dyes
AbstractIn this work ion mobility time-of-flight mass spectrometry is preliminarily studied as a method for identification of the composition for triphenylmethane ball point pen dyes by their traces on paper. Components were identified as Basic violet 2, Methyl violet 6B, Methyl violet 2B, Crystal violet. All the compounds were shown to form excellent individual mass selective mobility peaks. Short time of analysis allow one to consider IMS/TOFMS as a perspective alternative for traditional methods of identification
Transmission of a Drift Tube Ion Mobility Spectrometer, Connected with a Mass Spectrometer
AbstractIn this work it is experimentally showed that transmission of atmospheric drift tube ion mobility spectrometer (DT-IMS), connected with mass spectrometer (MS), depends on ion mobility of investigated compounds, because of depletion effect of Bradbury-Nielson ion gate (IG), which previously has been approved only by standalone DT-IMS. Theoretical estimation of depletion width of IG is in good agreement with experimental data. Also it is found, that ion lost due to its pulsing work of IG are few times smaller, than its duty cycle. It's explained by difference in influence of coulomb repulsion at 100% and 1% duty cycle β in first case it's significant versus second case, when coulomb repulsion become negligibly small, that reduces lost of ions on entrance of MS interface
Non-uniform liquid in external field
To calculate the density profile of a liquid in an external field, it is necessary to consider the density as a functional of the system\u27s chemical potential, i.e. the correlation effects must be investigated. On the basis of a statistical-mechanical calculation, the authors obtained an expansion of the liquid density into a series of moments of correlation functions of different orders. The expression for the liquid density profile was obtained as a sum of local and correlation terms. The correlation term has been calculated within the Ornstein-Zernike approximation in the vicinity of the critical point. It is shown that this term decreases the total variation of density by about 10%
Non-uniform liquid in external field
To calculate the density profile of a liquid in an external field, it is necessary to consider the density as a functional of the system\u27s chemical potential, i.e. the correlation effects must be investigated. On the basis of a statistical-mechanical calculation, the authors obtained an expansion of the liquid density into a series of moments of correlation functions of different orders. The expression for the liquid density profile was obtained as a sum of local and correlation terms. The correlation term has been calculated within the Ornstein-Zernike approximation in the vicinity of the critical point. It is shown that this term decreases the total variation of density by about 10%
Heralded gate search with genetic algorithms for quantum computation
In this paper we present genetic algorithms based search technique for the
linear optics schemes, performing two-qubit quantum gates. We successfully
applied this technique for finding heralded two-qubit gates and obtained the
new schemes with performance parameters equal to the best currently known. The
new simple metrics is introduced which enables comparison of schemes with
different heralding mechanisms. The scheme performance degradation is discussed
for the cases when detectors in the heralding part of the scheme are not
photon-number-resolving. We propose a procedure for overcoming this drawback
which allows us to restore the reliable heralding signal even with
not-photon-number-resolving detectors
Objective risks of crossfit classes and ways to minimize them
The article considers the problem of risk classes crossfit professional athletes as well as beginners. The work also shows the most frequent injuries and their causes from the main body of the train in crossfit clubs. Discusses how to minimize themΠ ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ° ΡΠΈΡΠΊΠΎΠ² Π·Π°Π½ΡΡΠΈΡ ΠΊΡΠΎΡΡΡΠΈΡΠΎΠΌ ΠΊΠ°ΠΊ Ρ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
Π°ΡΠ»Π΅ΡΠΎΠ², ΡΠ°ΠΊ ΠΈ Ρ Π½ΠΎΠ²ΠΈΡΠΊΠΎΠ². Π’Π°ΠΊΠΆΠ΅ Π² ΡΠ°Π±ΠΎΡΠ΅ ΡΠΊΠ°Π·Π°Π½Ρ ΡΠ°ΠΌΡΠ΅ ΡΠ°ΡΡΡΠ΅ ΡΡΠ°Π²ΠΌΡ ΠΈ ΠΏΡΠΈΡΠΈΠ½Ρ ΠΈΡ
Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΡ Ρ ΠΎΡΠ½ΠΎΠ²Π½ΠΎΠ³ΠΎ ΠΊΠΎΠ½ΡΠΈΠ½Π³Π΅Π½ΡΠ° ΡΡΠ΅Π½ΠΈΡΡΠ΅ΠΌΡΡ
Π² ΠΊΡΠΎΡΡΡΠΈΡ-ΠΊΠ»ΡΠ±Π°Ρ
. ΠΠΎΠ²ΠΎΡΠΈΡΡΡ ΠΎ ΡΠΏΠΎΡΠΎΠ±Π°Ρ
ΠΈΡ
ΠΌΠΈΠ½ΠΈΠΌΠΈΠ·Π°ΡΠΈ
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