Biomedical subjects

K I Eller

Publications and source records attributed to K I Eller.

At least 19 recordsLinked to original sources

PubMed2006

[Ochratoxin A contamination of cereal grain harvested in 2003 and 2004 years].

The analysis of ochratoxin A--mycotoxin produced by widely distributed Aspergillus and Penicillium--of cereal grain harvested in 2003 - 2004 years were performed by immunoaffinity column clean-up and HPLC with fluorescence detection. This survey examined 282 samples of raw grain wheat, rye, barley and oat 13.8% of all samples contaminated by ochratoxin A in the range 0.2-33.3 mg/kg. Calculation made on the basis of the obtained means showed that the daily ochratoxin A intake of human from cereal grain were from 1.58 to 2.84 ng/kg b.w. Scientific Committee for Food of the European Commission suggested that it was prudent to reduce exposure to ochratoxin A as much as possible below 5 ng/kg bw/day. Codex Alimentarius and European Commission have established maximum permissible level of 5 mg/kg for ochratoxin A in raw cereal grains.

Aspergillus ochraceus↗

PubMed2006

[The method of the simultaneous determination of the citrinin and ochratoxin A content in cereals and cereal products].

The simplifyed method of simultaneous determination of the citrinin (CT) and ochratoxin A (OTA) in cereals is described. The extraction of mycotoxins was carried out by small volumes of solvents (water/aceton/hexane) without additional sample clean up and concentration. The extracts were analysed by HPLC using mixture of methanol/ethylacetate/phosphoric acid, pH 2.2 as a mobile phase and fluorescence detection (lamda ex 330 nm, lamda em 495 nm). The reliability and reproducibility of results were improved by usage of internal standard--methyl-derivative of ochratoxin A. Average recovery of CT and OTA was 70%, relative standard deviation 12% and 7%, respectively, limit of detection 0.003 mg/kg.

Chromatography, High Pressure Liquid↗

PubMed2006

[Ochratoxin A content in baby food].

The purpose of this study was to investigate the ochratoxin A content in baby food. The analysis of ochratoxin A were performed by immunoaffinity column clean-up and HPLC with fluorescence detection. The detection limit was 0.2 mg/kg. Ochratoxin A was detected in 22.5% of 40 samples up to 1.2 mg/kg. Mean level was 0.15 and 0.31 mg/kg. Ochratoxin A level was higher in oat-based samples. Calculations made on the basis of the obtained means showed that the daily ochratoxin A dietary intake were up to 1.72 ng/kg b.w.

Food Analysis↗

PubMed2005

[Status and prospects of development of legislative base for food supplements turnover in some countries].

The articles contains the results of modern legislative base, regulating food supplements turnover in the USA, some European contries, as well as passed by European Parliament.

Dietary Supplements↗

PubMed2004

[Food supplements and medicines of vegetative origin. Safety estimation and standardization].

The article describes the modern legislative and normative base of both Russian made and foreign made food supplements turnover. The main requirements to them. The reasons for banning the use of some particular ingredients in food supplements formula are substantiated. The ways of improving the normative base for food supplements as well as for medicines of vegetative origin are proposed. The conclusion is made, that this base is more perfect than for the medicines, produced from herbs.

Consumer Product Safety↗

PubMed2003

[Complex approach to evaluation of natural quality of coloured juices].

A novel multidimensional approach to estimation of fruit and berry colored juice authenticity is proposed. It includes determination of quality (determination of 5-hydroxymethylfurfurol) and authenticity (determination of organic acids, hydrocarbons, anthocyanin pigments and artificial colorants) parameters. Both experimental and literature data on chemical composition of 12 colored fruits and berries are summarized. New composition characteristics of pomegranate, bilberry, red currant, blackberry and lingonberry are presented.

Anthocyanins↗

PubMed2001

[5-hydroxymethylfurfural as indicator of quality of juices for child nutrition].

132 samples of domestic and imported juices and juice concentrates for child nutrition were analyzed on content of 5-hydroxymethylfurfurol (5-HMF), which is considered as an indicator of violation of juice manufacturing technology. The concentrations of 5-HMF in 15.9% of domestic juice samples and 10.3% of imported juice and concentrate samples were found higher than 20 mg/L--maximum level established by AIJN for some juices and nectars. The results confirmed the expediency of including of HMF maximum concentration in hygienic characterization of fruit juices and concentrates as an indicator of violation of their manufacturing and storage procedures.

Beverages↗

PubMed1997

Evaluation of hydromatrix and magnesium sulfate drying agents for supercritical fluid extraction of multiple pesticides in produce.

The simultaneous extraction of relatively polar and nonpolar pesticides has been problematic in multiresidue analysis using supercritical fluid extraction (SFE) with carbon dioxide. In fruit and vegetable samples, which typically contain 80-95% water, moisture acts to increase SFE recoveries of many polar pesticides, but a drying agent should be used to control water in SFE. Hydromatrix, a prevalent drying agent, has many desirable characteristics, but it reduces recovery of certain important pesticides, such as methamidophos, acephate, and omethoate. MgSO4 has been shown previously to be applicable for the extraction of methamidophos and six other pesticides, but MgSO4 has practical disadvantages in its use. In this study, properties and SFE results with the individual drying agents and their combination were evaluated. Simultaneous recoveries for polar and nonpolar pesticides were achieved for 71 pesticides fortified in apple using a mixture of 2 + 1 + 2 MgSO4-H2O-Hydromatrix-sample for extraction. The advantages of each drying agent were maintained by their combination. The analysis of real samples, however, showed that more study was needed to improve recoveries of nonpolar pesticides.

Chemistry, Agricultural↗

PubMed1991

[Determination of histamine and serotonin in whole blood using the method of high performance liquid chromatography].

The authors have developed a method for measuring histamine and serotonin in whole blood, based on reverse-phase high-performance liquid chromatography of 5-dimethylaminonaphthyl sulfonic (DNS) amine derivatives with fluorometric detection. Chromatography in a mini-column packed with polyamide was employed for the isolation and purification of DNS-histamine and serotonin. The lowest detectable level of histamine is 2-2.5 ng/ml of blood, that of serotonin 1-1.5 ng/ml. The method was tried with whole blood samples from children suffering from various allergic conditions. Whole blood histamine and serotonin concentration were found particularly elevated in the patients with gastrointestinal allergies.

Child↗

PubMed1990