the majority of rhizospheric bacteria, particularly fluorescent pseudomonads are able to stimulate plant growth by producing different metabolites including hydrogen cyanide and siderophores. to evaluate the effect of these metabolites on wheat growth, strains of fluorescent pseudomonads were isolated from the wheat rhizosphere in khorasan provinces, identified and studied for production of hyd...

Noise-induced hearing loss is the most prevalent occupational injury in the United States despite the adoption of clear permissible exposure limits and protocols for hearing conservation. This study identifies low-level chemical asphyxiant exposure as a risk factor capable of potentiating noise-induced hearing loss. Rats were exposed to 10, 30, and 50 ppm hydrogen cyanide (HCN) alone for 3.5 h ...

Pseudomonas aeruginosa is the primary cause of chronic airway infections in cystic fibrosis (CF) patients. Persistent infections are seen from the first P. aeruginosa culture in about 75% of young CF patients, and it is important to discover new ways to detect P. aeruginosa at an earlier stage. The P. aeruginosa biomarker hydrogen cyanide (HCN) contains a triple bond, which is utilized in this ...

The measurement of infrared spectra for cyanide liganded to hemeproteins and hemins has been investigated. The hemeproteins included human methemoglobin A, lamprey methemoglobin, metchlorocruorin, horse metmyoglobin, and horseradish peroxidase. The hemins were dicyanide and monopyridine monocyanide species of deuteroporphyrin IX iron(III) and its 2,4-divinyl(proto) and 2,4-diacetyl derivatives....

The two factors of drought conditions and export markets are focusing recent attention on nitrates and prussic acid in forages. During normal years, nitrate-nitrogen (NO3-N) taken up by crops is quickly converted into protein. When forages grow under drought stress, however, they tend to accumulate nitrate. Alternative forages such as sorghums and sudans tend to accumulate even higher levels, w...

Cyanide compounds are hazardous which extremely toxic to living organisms, especially free cyanide in the form of hydrogen gas (HCN) and ion (CN−). These metabolic inhibitors since they can tightly bind metals metalloenzymes. Anthropogenic sources contribute significantly CN− contamination environment, more specifically surface underground waters. The treatment processes, such as chemical physi...

The aim of this work was to determine a cost-optimal design the distillation unit Andrussow process. For purpose, feed with mass flow rate 121 t h−1 and concentration ca. 2 wt % hydrogen cyanide (HCN) considered. An approach for process intensification developed goal achieve desired product qualities, while minimizing organonitrile accumulation in column. simple column established base case ext...

Sumbawa’s Kuris River is one of the rivers contaminated by island’s traditional gold mine. In order to detect contaminant levels, we examine magnetic susceptibility, HCN and heavy metal contents on river’s surface sediment. Environmental pollution has been widely assessed using a combination properties geochemical analysis. The goals this research are discover how susceptibility (χ) can be used...

abstract many agricultural researches have been performed to improve soil productivity. nitrogen (n) and phosphorus (p) are essential elements which are utilized by the plants in large amounts. phosphorus can be provided by applying chemical fertilizers. microorganisms convert insoluble phosphate to the soluble form and some bacteria such as rhizobacteria play an important role in this process....