Direct determination and calculation of aqueous hydrogen sulfide

Broderius, Steven J.; Smith, Larry

doi:10.1021/ac50011a024

Cited by 49 publications

(37 citation statements)

References 5 publications

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“…The latter is thought to be largely responsible for sulfide toxicity, because it is the species that is permeable across the cell membrane (17). We calculated H 2 S concentration using pH estimates for each site and the acid-base equilibrium equation of Broderius and Smith (2). Both models were statistically significant, as indicated by their positive regression slopes (Table 3), and they also indicated a positive correlation between sulfide tolerance and environmental sulfide.…”

Section: Resultsmentioning

confidence: 99%

Variation in Sulfide Tolerance of Photosystem II in Phylogenetically Diverse Cyanobacteria from Sulfidic Habitats

Miller

Bebout

2004

Appl Environ Microbiol

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Physiological and molecular phylogenetic approaches were used to investigate variation among 12 cyanobacterial strains in their tolerance of sulfide, an inhibitor of oxygenic photosynthesis. Cyanobacteria from sulfidic habitats were found to be phylogenetically diverse and exhibited an approximately 50-fold variation in photosystem II performance in the presence of sulfide. Whereas the degree of tolerance was positively correlated with sulfide levels in the environment, a strain's phenotype could not be predicted from the tolerance of its closest relatives. These observations suggest that sulfide tolerance is a dynamic trait primarily shaped by environmental variation. Despite differences in absolute tolerance, similarities among strains in the effects of sulfide on chlorophyll fluorescence induction indicated a common mode of toxicity. Based on similarities with treatments known to disrupt the oxygen-evolving complex, it was concluded that sulfide toxicity resulted from inhibition of the donor side of photosystem II.Understanding how evolutionary processes, environmental variation, and geography shape the distribution of genetic and ecological diversity of microorganisms is a fundamental challenge in microbial ecology. Cyanobacteria provide an excellent natural system for investigating the evolution of ecological differences, because these oxygenic phototrophs have diversified to exploit a wide variety of aquatic and terrestrial environments, including hot springs, polar ponds, hot and cold deserts, and hypersaline lagoons (38). By combining physiological experiments with molecular phylogenetics, it has become possible to study the origins of this ecological variation within an evolutionary framework. This integration of approaches has been used to identify several examples of the physiological adaptation of unique cyanobacterial lineages in response to major environmental variables, including salinity (14), light (25), and temperature (23).Another key variable that can vary greatly across cyanobacterial habitats is sulfide, an inhibitor of oxygenic photosynthesis (27). While it is absent from stably oxygenated environments, sulfide is either permanently or periodically present in many ecosystems where cyanobacteria are found, as a result of its presence in source water and/or biological sulfate reduction. These include benthic microbial mat communities that are commonly found in hot springs and both hypersaline and marine sediments (29). Cyanobacteria likewise vary in sulfide tolerance, and strains that typically are not exposed to sulfide in nature, including most planktonic and heterocystous cyanobacteria, are extremely sensitive to and are irreversibly poisoned by this toxin (6,10,15,27). In contrast, those from sulfidic habitats exhibit one or more adaptations for maintaining their photoautotrophic metabolism under such conditions. These include the maintenance of oxygenic photosynthesis by the resistance of photosystem (PS) II to sulfide (6, 10) and the ability to perform PS II-independent, anoxygenic pho...

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Section: Resultsmentioning

confidence: 99%

Variation in Sulfide Tolerance of Photosystem II in Phylogenetically Diverse Cyanobacteria from Sulfidic Habitats

Miller

Bebout

2004

Appl Environ Microbiol

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“…Pažymėtina, jog H 2 S labai gerai disocijuoja biologiniuose tirpaluose, vykstant cheminėms reakcijoms (Broderius, Smith 1977):…”

Section: Gauti Rezultatai Ir Jų Analizėunclassified

Research of Biogas Purification Using Microalgae Monoraphidium Griffithii Suspension

Bingelytė

Zagorskis

2017

Science - Future of Lithuania

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2017 © Straipsnio autoriai. Leidėjas VGTU leidykla "Technika". Šis straipsnis yra atvirosios prieigos straipsnis, turintis Kūrybinių bendrijų (Creative Commons) licenciją (CC BY-NC 4.0), kuri leidžia neribotą straipsnio ar jo dalių panaudą su privaloma sąlyga nurodyti autorių ir pirminį šaltinį. Straipsnis ar jo dalys negali būti naudojami komerciniams tikslams. Biodujų valymas naudojant mikrodumblių suspensijas ne visais atvejais užtikrina itin aukštą biodujų išvalymo efektyvumą, todėl svarbu tobulinti tokių sistemų konstrukcijas, optimizuoti terpių sąlygas, parinkti tinkamus mikrodumblius. MOKSLAS -LIETUVOS ATEITIS SCIENCE -FUTURE OF LITHUANIAGėlame vandenyje plačiai paplitę mikrodumbliai Monoraphidium griffithi yra priskiriami prie didelę absorbcinę teršalų gebą turinčių kultūrų.Naudojant nevalytas biodujas kaip anglies dioksido šaltinį Monoraphidium griffithii gyvybinei veiklai, pasiekiama dvejopa nauda: 1) išvalytose biodujose nelieka jokių kenksmingų sudedamųjų komponentų; 2) sumažinamos biomasės gamybos sąnaudos (Hendroko et al. 2013). Reikšminiai žodžiai: metanas, biologinis valymas, mikrodumblių kultūra, biodujos, suspensija, fotobioreaktorius. BIODUJŲ VALYMO EFEKTYVUMO TYRIMAI NAUDOJANT MIKRODUMBLIŲ MONORAPHIDIUM GRIFFITHII

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“…Thin layer chromatography revealed the presence of mostly pheophytin a with traces of chl a . The reaction between chl a and H2S would proceed in the following way: Based on the pK, values for reactions [7] and [8], only the former is favored (22). The HS-will be oxidised before reacting with MgZ+.…”

Section: The Effect Of So On Chl a Multilayermentioning

confidence: 99%

Effect of pollutant gases on chlorophyll a multilayer

Chapados¹,

Germain²,

Leblanc³

1981

Can. J. Chem.

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. Can. J. Chem. 59,2402Chem. 59, (1981. The aim of this paper is to examine the direct effect of polluting gases on chlorophyll a (chl a ) multilayer arrays. The pollutants studied are CO, CO,, SO,, H,S, NO, and NO,. Electronic and infrared spectroscopies were used to monitor the time effect of the polluting gases on chl a molecules. TLC, atomic absorption, and electronic spectroscopies were used to characterise the reaction products. The results show that neither CO nor C0, affect the chl a molecules in the multilayer arrays. Upon exposure to SO,, we notice many modifications on the electronic and ir spectra. All the evidence confirms that one of the reaction products is pheophytin a . A mechanism is presented to explain the reaction of SO, with chl a . The effect of H2S on chl a is less pronounced than that of SO,, but the end products are the same. NO and NO, have exactly the same effect on the chl a multilayer. The reaction is much more drastic than the reaction of chl a with either SO, or H,S. There is opening of the cycle and nitration of the chl a molecule. CAMILLE CHAPADOS, DENIS GERMAIN et ROGER M. LEBLANC. Can. J. Chem. 59,2402Chem. 59, (1981.On a Ctudie I'effet de polluants gazeux (CO, CO,, SO2, H2S, NO et NO2) sur les molecules de chlorophylle a (chl a ) dans un arrangement multicouche. Les spectroscopies electronique et infrarouge ont etC utilisees pour determiner I'effet de ces polluants sur lachl a . La chromatographie sur couche mince ainsi que les spectroscopies d'absorption atomique et electronique ont 6te employees pour caracteriser les produits de reaction. Les resultats montrent que le CO, et le CO n'ont pas d'effet sur la multicouchede chl a . En presence de SO,, on note des modifications importantes sur les spectres electroniques et les spectres infrarouges de la chl a . Toutes les evidences experimentales indiquent qu'un des produits de la reaction est la pheophytine a . Un mecanisme reactionnel est prtsente pour expliquer I'interaction du SO, avec la chl a . L'effet du H2S sur la chl a est moins prononce que dans le cas du SO, bien que les produits de la reaction soient les m&mes. Avec le NO et le NO,, qui se comportent d'une f a~o n identique avec la chl a , I'effet est plus drastique que dans le cas du SO, et H2S. I1 se produit une ouverture du cycle avec nitration de la chl a .

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Direct determination and calculation of aqueous hydrogen sulfide

Cited by 49 publications

References 5 publications

Variation in Sulfide Tolerance of Photosystem II in Phylogenetically Diverse Cyanobacteria from Sulfidic Habitats

Variation in Sulfide Tolerance of Photosystem II in Phylogenetically Diverse Cyanobacteria from Sulfidic Habitats

Research of Biogas Purification Using Microalgae Monoraphidium Griffithii Suspension

Effect of pollutant gases on chlorophyll a multilayer

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