A laboratory prototype of a microcomputer-based analyzer was developed for quantitative determination of formaldehyde in liquid samples, based on catalytic chemosensing elements. It was shown that selectivity for the target analyte could be increased by modulating the working electrode potential. Analytical parameters of three variants of the amperometric analyzer that differed in the chemical ...

Evaluating an enzyme immunoassay (EIA) procedure based on antibody coated on solid-phase materials for assay of triiodothyronine (T3) (1), we observed a considerable improvement in the precision of this assay when the antibody coating on solid-phase matrix was carried out with shaking. In the EIA procedure, the coated beads are incubated with 30 pg of horseradish peroxidase-labeled T3 and T3 st...

We have developed a rapid and cost-effective enzyme immunoassay for dehydroepiandrosterone sulfate (DHEA-S) in plasma, performed with samples on a microtitre plate within 2.5 h. No extraction or centrifugation steps are involved. The 3-hemisuccinate of dehydroepiandrosterone is labeled with horseradish peroxidase, then mixed with hydrogen peroxide substrate in the presence of the chromogen, tet...

OBJECTIVE This study aimed to analyze the incidence of colorectal cancer in 15 European countries in recent decades and the relationship between the incidence found and changes in dietary habits. METHODS Pearson's or Spearman's correlation coefficients were calculated by comparing incidence rates obtained from the International Agency for Research on Cancer for 1971-2002 with data on per capi...

rTrHE third Annual Report of the Joint Council *? of the Order of St. John of Jerusalem, and the British Red Cross Society states that the decision to reorganise Departments at Headquarters with a view to greater economy in management, is reflected in the accounts. The total administrative expenditure for the past year on Departments other than stores, is over ?3,000 less than for the year ende...

This article describes the evolution, motivation and structure of the International Red Cross and Red Crescent Movement, and its contribution to international humanitarian law. It explains the respective roles of its three components: the National Societies, the International Federation of Red Cross and Red Crescent Societies, and the International Committee of the Red Cross (ICRC). It highligh...

Until recently there have been only two well recognized members of the urobilinogen group, mesobilirubinogen, the chromogen of i-urobilin,’ and stercobilinogen, the leuco compound of urobilin or stercobilin. While mesobilirubinogen is readily obtained in crystalline form following amalgam reduction of bilirubin or i-urobilin, stercobilinogen has never been crystallized. Stercobilin, however, wa...

Pigment in animal tissue results from the union of 2 substances: a colorless chromogen and a ferment or enzyme which activates the chromogen. Where either of these is absent there is no pigment, or, if present but in insufficient amount, the tissue is lacking in pigment in a proportionate degree. Lack of pigment in tissue is known as albinism. It is a hereditary genetic defect. The entire body ...

random early detection (red) is one of the most commonly used active queue management (aqm) algorithms that is recommended by ietf for deployment in the network. although red provides low average queuing delay and high throughput at the same time, but effectiveness of red is highly sensitive to the red parameters setting. as network condition varies largely, setting red's parameters with fixed ...

the relationship between altitude, slope and tree age with the red heartwood of beech (fagusorientalis lipsky) were investigated. transect sampling method was used to collect the data. theresults showed that in the 476 sampled trees, 132 trees were suffering the phenomenon of red heartswith deferent shape and size. the results indicate that the tree with red heartwoods in shafa-roudforest area,...