Investigations were performed on soils of different acidity, ranging in the pH interval 4.65–5.80 (in water). Changes of the mineral nitrogen forms in the examined soils were studied by applying short-term incubation experiments performed under aerobic conditions, with a humidity of 30 % and a temperature of 20 °C, both with and without the addition of 100 and 300 ppm NH4–N. The results of the ...

The main goal of the study was the analysis of the parameters of wastewater generated during the ex situ underground coal gasification (UCG) experiments on lignite from Belchatow, and hard coal from Ziemowit and Bobrek coal mines, simulated in the ex situ reactor. The UCG wastewater may pose a potential threat to the groundwater since it contains high concentrations of inorganic (i.e., ammonia ...

PURPOSE The purpose of this study was to establish the alterations of oxidative stress-related markers in keratoconus (KC) corneas. METHODS A total of 6 healthy and 11 ectatic corneas (7 KC and 4 post-LASIK) were studied. Different oxidative stress-related markers were determined to assess their implication in the KC pathophysiology. Total antioxidant capacity and total nitrites present in th...

Volatile organic nitrites were originally used to relieve the chest pain that is associated with angina pectoris. Today, these inhalants are predominantly used as drugs of abuse. Little is known regarding the bioavailability and disposition of volatile nitrites. In this study, the pharmacokinetics of a major organic nitrite inhalant, isobutyl nitrite (ISBN), and its primary metabolite, isobutyl...

BaO adsorbents, together with transition metal catalysts, can be used to trap smog-causing NO from combustion effluent streams that lack CO or residual hydrocarbons as reductants. 3 Transition metals catalyze NO oxidation to NO2, a molecule that readily adsorbs on many porous solids, but which also inhibits NO oxidation by titrating active sites on catalytic surfaces with oxygen atoms. 8 As a r...

BACKGROUND Post-cholecystectomy bile duct injuries are identified by the onset of jaundice as well as elevated bilirubin and alkaline phosphatase levels during the peri-operative period. It is unknown how serum oxidative stress markers are modified in patients with post-cholecystectomy bile duct injuries. OBJECTIVE To determine serum oxidative stress marker levels (lipid peroxidation by-produ...

To investigate the changes in nitric oxide (NO) production during and after normal pregnancy and in pregnancies complicated by preeclampsia, we measured serum nitrates and nitrites (NOx) concentrations and serum iron markers in 347 subjects. Serum NOx concentrations were determined after reduction of nitrates to nitrites using the Griess reaction. Serum iron and serum ferritin were assayed usin...

The aim of this work was to evaluate ontogeny of reactive nitrogen species (RNS) production by peripheral blood phagocytes in pig. Pig fetuses (55 and 92 days of gestation) and postnatal piglets (1, 3, 8, 17, 31 and 41 days after birth) were used. RNS production was measured by fluorescent probes diaminofluorescein-diacetate (DAF-FMDA) and dichloro-fluorescein-diacetate (H2DCFDA). Levels of nit...

The immunocompromise syndrome in homosexual men in the USA is thought to be associated with cytomegalovirus (CMV) infection and nitrite intake. Such men often have a lymphopenia. In a clinic in London 76% of 46 unselected homosexual men and 50% of 76 heterosexual controls had serum CMV IgG antibody at a titre of 1/16 or more (p less than 0.01). No case of excretion of CMV in the urine was found...