Pseudomonas aeruginosa colonizes and can persist in the lungs of cystic fibrosis (CF) patients for decades. Adaptation of P. aeruginosa to the CF lung environment causes various genotypic and phenotypic alterations in the bacterium that facilitate persistence. We showed previously that isocitrate lyase (ICL) activity is constitutively upregulated in the P. aeruginosa CF isolate FRD1. We show he...

BACKGROUND There has been a worldwide concern for the health risks of cigarette smoking and hydrogen cyanide (HCN) considered as one of the hazardous tobacco compounds which is needed to be determined in order to reduce the dose related to smoke disease risk. In this study, we prepare the experimental procedure to entrap the HCN from mainstream smoke of different brands of Tehran cigarette, thr...

Polymers of hydrogen cyanide and their hydrolysis products constitute a plausible, but still poorly understood proposal for early prebiotic chemistry on Earth. HCN polymers are generated by the interplay of more than a dozen distinctive reaction mechanisms and form a highly complex mixture. Here we use a computational model based on graph grammars as a means of exploring the chemical spaces of ...

The different HCN elimination pathways from vinyl cyanide (VCN) are studied in this paper using RRKM, Kinetic Monte Carlo (KMC), and quasi-classical trajectory (QCT) calculations. A new HCN elimination pathway proves to be very competitive with the traditional 3-center and 4-center mechanisms, particularly at low excitation energies. However, low excitation energies have never been experimental...

Cassava is a staple food for approximately 800 million people in tropical countries. The tuber which comprises mainly starch also contains high concentration cyanogenic glycosides which give rise to the hydrocyanic acid by enzymatic hydrolysis. The purpose this research therefore is to investigate the detoxification potential of fermentation, on the toxic (cyanide) content of cassava tuber. The...

Chirped-pulse millimeter wave (CPmmW) spectroscopy is a revolutionary technique that has taken advantage of advances in electronics to give high signal to noise broadband rotational spectra in a very short period of time that provides meaningful line intensities. We have implemented this technique in the 58 102 GHz range to study the rotational spectra of molecules with two heavy atoms. Photoly...

Posttranscriptional control is known to contribute to the regulation of secondary metabolism and virulence determinants in certain gram-negative bacteria. Here we report the isolation of a Pseudomonas aeruginosa gene which encodes a global translational regulatory protein, RsmA (regulator of secondary metabolites). Overexpression of rsmA resulted in a substantial reduction in the levels of extr...

We use the Variational Quantum Eigensolver (VQE) as implemented in Qiskit software package to compute ground state energy of small molecules derived from water, H$_2$O, and hydrogen cyanide, HCN. The work aims benchmark algorithms for calculating electronic structure surfaces relevance prebiotic chemistry, beginning with water run them on available simulated physical quantum hardware. numerical...

Sir,—An otherwise excellent and thorough report by Vesey, Cole and Simpson (1976) fails to acknowledge or refute a hypothesis which has already appeared in this Journal (Smith and Kruszyna, 1976a) about the mechanism by which cyanide is released from nitroprusside in vivo, and the significance of that reaction for blood cyanide concentrations. We are delighted with the confirmation that "The re...