AI Medical Compendium Journal:
Analytica chimica acta

Showing 101 to 110 of 119 articles

Thread based electrofluidic platform for direct metabolite analysis in complex samples.

Analytica chimica acta
The application of electrophoresis upon commercial threads is investigated for development of low-cost diagnostics assays, designed for the matrix separation and quantification of low abundance metabolites in complex samples - in this work riboflavin...

Rapid determination of ultra-trace plutonium isotopes (Pu, Pu and Pu) in small-volume human urine bioassay using sector-field inductively coupled plasma mass spectrometry.

Analytica chimica acta
A rapid method with enhanced U decontamination was developed for ultra-trace Pu analysis in small-volume urine bioassays. This method consists of acid digestion, co-precipitation, extraction chromatography and sector-field inductively coupled plasma ...

Determination of ultra-trace level of Th in seawater by ICP-SFMS after matrix separation and preconcentration.

Analytica chimica acta
This article describes the development and validation of an analytical procedure for the matrix separation, preconcentration and determination of sub-ng kg levels Th in a small volume (20 mL) of seawater samples. The matrix separation and Th preconce...

Fluorescence resonance energy transfer aptasensor between nanoceria and graphene quantum dots for the determination of ochratoxin A.

Analytica chimica acta
In the present work, colloidal cerium oxide nanoparticles (nanoceria) and graphene quantum dots (GQDs) were firstly synthesized by sol-gel method and pyrolysis respectively, which all have a uniform nano-size and significant fluorescence emission. Du...

Automatic feed phase identification in multivariate bioprocess profiles by sequential binary classification.

Analytica chimica acta
In this paper, we propose a new strategy for retrospective identification of feed phases from online sensor-data enriched feed profiles of an Escherichia Coli (E. coli) fed-batch fermentation process. In contrast to conventional (static), data-driven...

Sensitive detection of DNA methyltransferase using the dendritic rolling circle amplification-induced fluorescence.

Analytica chimica acta
The analysis of DNA methylation and MTase activities is very important in the early clinical diagnosis of cancer, on purposes of providing insights into the mechanism of gene repression and developing novel drugs of treating methylation-related disea...

Highly sensitive detection of multiple tumor markers for lung cancer using gold nanoparticle probes and microarrays.

Analytica chimica acta
Assay of multiple serum tumor markers such as carcinoembryonic antigen (CEA), cytokeratin 19 fragment antigen (CYFRA21-1), and neuron specific enolase (NSE), is important for the early diagnosis of lung cancer. Dickkopf-1 (DKK1), a novel serological ...

Parts-per-trillion detection of harmala alkaloids in Undaria pinnatifida algae by on-line solid phase extraction capillary electrophoresis mass spectrometry.

Analytica chimica acta
β-carboline alkaloids of the harmala group (HAlks)-a family of compounds with pharmacologic effects-can be found at trace levels (<25 μg kg algae) in the edible invasive algae Undaria pinnatifida, known commonly as wakame. In this study, we present a...

Quantification of plasma sulfatides by mass spectrometry: Utility for metachromatic leukodystrophy.

Analytica chimica acta
Impaired sulfatide catabolism is the primary biochemical insult in patients with the inherited neurodegenerative disease, metachromatic leukodystrophy (MLD), and sulfatide elevation in body fluids is useful in the diagnostic setting. Here we used mas...

Support vector machine classification trees based on fuzzy entropy of classification.

Analytica chimica acta
The support vector machine (SVM) is a powerful classifier that has recently been implemented in a classification tree (SVMTreeG). This classifier partitioned the data by finding gaps in the data space. For large and complex datasets, there may be no ...