نتایج جستجو برای: spectrometric
تعداد نتایج: 7978 فیلتر نتایج به سال:
Xantphos is a wide bite angle bisphosphine ligand that finds application in catalysis. Tracking its behavior during reactions under realistic reaction conditions can be difficult at low concentrations, and although electrospray ionization mass spectrometry (ESI-MS) effective real-time monitoring of catalytic reactions, it only observe ions. Accordingly, we experimented with the dianionic disulf...
In some applications, especially spectrometric ones, curve classifiers achieve better performances if they work on the m-order derivatives of their inputs. This paper proposes a smoothing spline based approach that give a strong theoretical background to this common practice.
Motivated by the analysis of spectrometric data, a Gaussian graphical model for learning dependence structure among frequency bands infrared absorbance spectrum is introduced. The spectra are modeled as continuous functional data through B-spline basis expansion and assumed prior specification smoothing coefficients to induce sparsity in their precision matrix . Bayesian inference carried out s...
The chemical identification of mass spectrometric signals in metabolomic applications is important to provide conversion of analytical data to biological knowledge about metabolic pathways. The complexity of electrospray mass spectrometric data acquired from a range of samples (serum, urine, yeast intracellular extracts, yeast metabolic footprints, placental tissue metabolic footprints) has bee...
In the previous paper from this series, we proposed mass spectrometric fingerprinting of complex botanical samples upon the examples of the pharmacologically important phenolic acids and flavonoids selectively extracted from Salvia lavandulifolia. In this study, we explore fingerprinting efficiency with a novel two-dimensional analytical system composed of the reversed-phase thin-layer chromato...
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