An inexpensive paper-based sensor was developed for detecting low ppm concentrations of hydrogen sulfide gas. A piece of filter paper containing aquohydroxocobinamide [OH(H2O)Cbi] was placed on the end of a bifurcated optical fiber, and the reflectance spectrum of the OH(H2O)Cbi was monitored during exposure to 10.0 ppm hydrogen sulfide gas (NIOSH recommended exposure limit). Reaction of sulfid...

(1) Boudens R, Reid T, VanMensel D, Prakasan MRS, Ciborowski JJ, Weisener CG. Biophysicochemical effects of gamma irradiation treatment for naphthenic acids in oil sands fluid fine tailings. Sci Total Environ 2016 Jan 1;539:114-24. Abstract: Naphthenic acids (NAs) are persistent compounds that are components of most petroleum, including those found in the Athabasca oil sands. Their presence in ...

Sulfate-reducing bacteria (SRB) are widely existed in oil production system, and its H2S product inhibits rhamnolipid producing bacteria. In-situ production of rhamnolipid is promising for microbial enhanced oil recovery. Inhibition of SRB, removal of H2S and production of rhamnolipid by recombinant Pseudomonas stutzeri Rhl were investigated. Strain Rhl can simultaneously remove S(2-) (>92%) an...

(2) Dehaut A, Midelet-Bourdin G, Brisabois A, Duflos G. Phenotypic and genotypic characterization of H S positive and negative strains of Shewanella baltica isolated from spoiled whiting (Merlangius merlangus). Lett Appl Microbiol 2014 Jul 29. Abstract: Four strains were isolated from a spoiled whiting (Merlangius merlangus). All of them were able to grow aerobically from 4 degrees C to 30 degr...

A novel probe based on the fluorescence off-on strategy was prepared to optically detect hydrogen sulfide (H2S) via an excited state intramolecular proton transfer (ESIPT) mechanism. The probe shows high sensitivity and excellent selectivity to H2S. It also displays a large Stokes shift ( approximately 140nm) and a remarkable quantum yield enhancement (capital EF, Cyrillic=0.412) after interact...

"[...] quello che, a nostro parere, andrebbe considerato come il soggeto centrale dell’ intero processo di riproduzione assistita, vale a dire il bambino, soggetto, peraltro, piuttosto trascurato dalla letteratura in tema di procreatica." In: La Fecondazione Assistita. Documenti del Comitato Nazionale per la Bioetica. Presidenza del Consiglio dei Ministri, Dipartimento per l'Informazione e l'Ed...

In order to improve H2 utilization efficiency and to reduce energy consumption during the hydrogenotrophic sulfate reduction process, a two-chambered microbial electrolysis system (MES) with a biocathode was constructed. The performance of MES in terms of sulfate removal and the electron utilization was studied. With an applied voltage of 0.8 V, biocathode removed about 109.8 mg x L(-1) of SO4(...

Discoveries on the toxic effects of cysteine accumulation and, particularly, recent findings on the many physiological roles of one of the products of cysteine catabolism, hydrogen sulfide (H2S), are highlighting the importance of this amino acid and sulfur metabolism in a range of cellular activities. It is also highlighting how little we know about this critical part of cellular metabolism. I...

(1) Zhu A, Luo Z, Ding C, Li B, Zhou S, Wang R, et al. A two-photon "turn-on" fluorescent probe based on carbon nanodots for imaging and selective biosensing of hydrogen sulfide in live cells and tissues. Analyst 2014 Feb 27. Abstract: Determination of hydrogen sulfide (H2S) in live cells and tissues is still a challenge for evaluating the key roles that H2S plays in physiological and pathologi...