Analysis of the retraining strategies for multi-label text message classification in call/contact center systems.

Today, in many areas of technology, we can come across applications of various artificial intelligence methods. They usually involve models trained on some specific pool of learning data. Sometimes, however, the data analyzed by these solutions can change its nature over time.

[Concentration of glutathione (GSH), ascorbic acid (vitamin C) and substances reacting with thiobarbituric acid (TBA-rs) in single human brain metastases].

The aim of the study was to estimate the concentration of glutathione (GSH), ascorbic acid (vitamin C) and thiobarbituric acid (TBA-rs) in single human brain metastases and histologically unchanged nerve tissue. The research was conducted on fragments of neoplasmatic tissue collected from 45 patients undergoing surgery in the Department of Neurosurgery, Medical University of Białystok in years 1996-2002. Concentration of GSH was evaluated using the GSH-400 method, vitamin C using the method of Kyaw and TBA-rs using the method of Salaris and Babs.

Evaluation of antioxidant enzymes activity and concentration of non-enzymatic antioxidants in human brain tumours.

Unlabelled: The purpose of our research was to assess the activity of GSH-Px, GSSG-R, SOD-1 and concentration of GSH, Vit.C and reactive substances with thiobarbituric acid, in brain tumours with Ist, IInd, IIIrd and IVth levels of biological malignancy. The research was conducted in 105 samples obtained from patients undergoing surgery in the Department of Neurosurgery of the Medical University of Białystok between the years 1996-2001.

The decrease in antioxidant potential in human brain tumours.

Unlabelled: The objective of our research was to estimate the activity of superoxide dismutase (SOD-1), glutathione peroxidase (GSH-Px) and glutathione reductase (GSSG-R), as well as the concentrations of free oxygen radicals "sweepers" (GSH, Vit.C) and the concentrations of the substances reacting with thiobarbituric acid in brain tumours with II, III and IV level of biological malignancy. The research was conducted on 61 samples obtained from the patients operated in the Department of Neurosurgery of the Medical Academy of Białystok between the years 1996 and 2000.

[Activity of glutathione peroxidase (GSH-Px), glutathione reductase (GSSG-R) and superoxide dismutase (SOD-1) in single brain metastasis].

The aim of the study was to evaluate the activity of glutathione peroxidase (GSH-Px), glutathione reductase (GSSG-R) and superoxide dysmutase (SOD-1) in the single brain metastases. The activity of the GSH-Px was evaluated with the use of spectrophotometry, GSSG-R was evaluated basing on the method of Mize and Langdon and SOD-1 with Sykes et al. method.