algae had no significant effect on DMD, CH4 or NH4–N (P>0.374), but lower CH4 emissions were generally observed with increasing protection level. Slower turnover rate and lower protection level may serve to promote toxic effects of the algae on rumen microbes, as indicated by the observed onset of floating digesta mat instability, which may reflect reduced production of fermentation gases (CH4 ...

It is found that the chemical composition of exhaust gases emitted by IC reciprocating engines includes not only such harmful toxic substances as NOx, CH, PM and CO but also dioxins. Dioxins are characterized by incredibly destructive impact on human health. In the paper a short profile of dioxins, terms of dioxin formation and measures for their reduction are presented. Some experimental data ...

Exact definition of basic concepts and terms is of paramount importance to the question of maximal allowable concentrations of toxic substances in industrial atmospheres. The differences existing in various countries are often due to differences in the interpretation of basic concepts. Mutual agreement on the question of basic concepts will facilitate a rapprochement of points of view, and, per...

We aimed to assess the effect of invasive group A streptococcal (GAS) infection and the potential effects of a multivalent GAS vaccine in New Zealand. During January 2005-December 2006, we conducted prospective population-based laboratory surveillance of Auckland residents admitted to all public hospitals with isolation of GAS from normally sterile sites. Using emm typing, we identified 225 per...

This work utilizes a statistical approach of Principal Component Analysis (PCA) towards the detection Methane (CH4)-Carbon Monoxide (CO) Poisoning occurring in coal mines, forest fires, drainage systems etc. where CH4 and CO emissions are very high closed buildings or confined spaces during oxidation processes. Both methane carbon monoxide highly toxic, colorless odorless gases. gases have thei...

Cases of deaths in manure or septic tanks are rare in legal-medical practice, more frequently as unfortunate occupational accidents. Poisoning with toxic gases, especially with hydrogen sulfide, is reported as the cause of death, while the exhaustion of oxygen in the air is omitted with the simultaneous excess of carbon dioxide. In such cases, determination of the direct cause of death constitu...

Gasotransmitters are biologically produced gaseous signalling molecules. As gases with potent biological activities, they are toxic as air pollutants, and the sulfurous compounds are used as fumigants. Most investigations focus on medical aspects of gasotransmitter biology rather than toxicity toward invertebrate pests of agriculture. In fact, the pathways for the metabolism of sulfur containin...

The air pollutions from combustion flue gas and industrial gases became worse and cause the environmental problem. It is difficult for the conventional methods such as selective catalytic reduction method and lime-gypsum method to treat exhaust gases energy efficiently and inexpensively. Its energy efficiency and its initial and running costs are still in negative situation for the backward nat...

As a reliable and scalable precursor of graphene, graphene oxide (GO) is of great importance. However, the environmentally hazardous heavy metals and poisonous gases, explosion risk and long reaction times involved in the current synthesis methods of GO increase the production costs and hinder its real applications. Here we report an iron-based green strategy for the production of single-layer ...