An increase in the H2 S (hydrogen sulphide, hereafter sulphide) concentration in pulmonary artery smooth muscle cells (PASMCs) has been proposed to mediate hypoxic pulmonary vasoconstriction (HPV). We evaluated this hypothesis in isolated rat intrapulmonary arteries (IPAs) by examining the effects of the sulphide precursor cysteine and sulphide-synthesis blockers on HPV and also on normoxic pul...

Whereas the compound formerly known as carvone hydrosulphide is, in fact, dicarvone sulphide [1], the genuine hydrosulphide, (—)-3-mercaptodihydrocarvone, has now been prepared by the addition of hydrogen sulphide to (—)-carvone in the presence of a base following a procedure analogous to that of van Tamelen and Grant [2]. Tt had boiling point 150-151 °/0.5 mm, ri&, 1.5221 [a]2i? —6.3° (c = 4 i...

Two environmentally safe iron compounds (synthetic magnetite and ferrous gluconate) have been evaluated as sulphide scavengers at temperature conditions of 25 °C, 35 °C, 45 °C and 55 °C at pH of 12 in a sulphide-contaminated drilling mud. The ferrous complex was found to be a better scavenger than synthetic magnetite. It exhibited 100 % scavenging efficiency within the first 40 minutes of agita...

A naphthalimide-azide based colorimetric and ratiometric fluorescent probe, NAP-1, has been developed for the selective and sensitive detection of hydrogen sulphide. Advantages of the probe NAP-1 include a low detection limit (110 nM), good selectivity, high sensitivity and excellent photostability. A linear relationship between the emission intensity ratios and sulphide concentrations was obse...

Antimony (Sb) isotopes are gaining increasing interest for their potential as geochemical tracers in geological, environmental and archaeological studies. However, little is known about the parameters controlling Sb isotope fractionation, which essential to interpret variations of isotopic signature natural systems. In this study, equilibrium mass-dependent fractionation factors (?-factor) were...

The loess-paleosol profile near the settlement of Pécel has a notable size among sequences Northern Carpathian territories. Therefore, comprehensive sedimentological examinations were performed to understand and information preserved in it. past periodicity intensity winds showed by particle composition studies (GSI, U-ratio). At least two source areas can be presumed based on geochemical indic...

Lizardite slime coating is one of significant factors in the deterioration floatability sulphide minerals. In this study, a nanoparticle cationic polystyrene-co-poly(n-butylacrylate)(PS-PBNH) collector was introduced to eliminate negative impact lizardite slimes pyrite flotation. Microflotation results demonstrated that slims did not affect recovery presence PS-PBNH. Good flotation separation f...

During the reaction between 1,3,5-tris(2-hydroxyethyl)hexahydro-s-triazine and hydrogen sulphide, the principle by-product is the organic sulphide 5-(2-hydroxyethyl)dithiazine. It can be determined by a novel, portable, field-capable ion mobility spectrometry method described herein and enables the "degree spent" to be determined. Dependant upon the level of carbon dioxide in the produced gas, ...