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<h3>Early anaerobic metabolisms | Philosophical Transactions of </h3>

Early anaerobic metabolisms | Philosophical Transactions of

Abstract. Before the advent of oxygenic photosynthesis, the biosphere was driven by anaerobic metabolisms. We catalogue and quantify the source strengths of the most probable electron donors and electron acceptors that would have been available to fuel early-Earth ecosystems. The most active ecosystems were probably driven by the cycling of H 2

<h3>Frontiers | Bio-Hydrogen Production Using Landfill Leachate </h3>

Frontiers | Bio-Hydrogen Production Using Landfill Leachate

Nov 17, 2021 · Biohydrogen production using photo-fermentation is one of the most popular bioprocesses used to produce hydrogen, where the purple non-sulfur photosynthetic bacteria grow on organic acids like lactic acid, butyric acid, and acetic acid and generate photosynthetic biohydrogen using light under anerobic conditions (Uyar et al., 2012).

<h3>Comparison of different mixed cultures for bio-hydrogen </h3>

Comparison of different mixed cultures for bio-hydrogen

Apr 01, 2010 · Combined dark-light fermentations for bio-hydrogen production may have advantages over sequential fermentation by reducing the fermentation time and increasing the hydrogen productivity. Most of the combined fermentations on bio-hydrogen production were carried out by batch operation [ 5 , 6 , 8 , 11 , 30 ].

<h3>Photosynthetic hydrogen production by droplet-based microbial </h3>

Photosynthetic hydrogen production by droplet-based microbial

Nov 25, 2020 · In contrast, mixtures of the Chlorella spheroids along with free E. coli cells showed no enhanced photosynthetic hydrogen production when compared with yields observed for aqueous suspensions of

<h3>Photosynthesis in Bacteria</h3>

Photosynthesis in Bacteria

Purple bacteria are probably the most widely studied photosynthetic bacteria, being used for all sorts of scientific endeavors including theories on possible microbiological life on other planets. Purple non-sulfur bacteria do not release sulfur because instead of using hydrogen sulfide as its reducing agent, they use hydrogen.

<h3>Table of Contents - Food and Agriculture Organization</h3>

Table of Contents - Food and Agriculture Organization

5.3.1 Hydrogen production by photosynthetic bacteria 5.3.2 Combined photosynthetic and anaerobic and bacterial hydrogen production. 5.4 Enhancement of hydrogen-producing capabilities through genetic engineering 5.5 Research and development on biological hydrogen production 5.6 Future prospects References. Chapter 6 - Oil production. 6.1 Oil

<h3>Microaerobic hydrogen production by photosynthetic bacteria </h3>

Microaerobic hydrogen production by photosynthetic bacteria

Jun 20, 2000 · Microaerobic hydrogen production by photosynthetic bacteria in a double-phase photobioreactor. Matsunaga T(1), Hatano T, Yamada A, Matsumoto M. Author information: (1)Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan. tmatsuna@cc.tuat.ac.jp

<h3>Lithogenic hydrogen supports microbial primary production in </h3>

Lithogenic hydrogen supports microbial primary production in

Jan 12, 2021 · In the absence of light, biomass production is driven by chemical energy through microbial chemosynthesis. H2, a potent reductant capable of supporting chemosynthesis, is readily generated by reactions between iron and silicate minerals and water. Here, we show that lithogenic H2 produced by glacial comminution of iron- and silica-rich basaltic bedrock supports microbial chemosynthesis

<h3>Hydrogen production by Cyanobacteria</h3>

Hydrogen production by Cyanobacteria

Dec 21, 2005 · Since photosynthesis decline much quicker then respiration, thus an equilibrium point is reached after a while, (usually after 22 hours) and after that the amount of oxygen that is used in respiration is greater then the oxygen released by photosynthesis and the cell become anaerobic and at this point hydrogen production occurs in higher

<h3>Microorganisms pumping iron: anaerobic microbial iron </h3>

Microorganisms pumping iron: anaerobic microbial iron

Oct 01, 2006 · Several purple and green anaerobic, anoxygenic, photosynthetic FOM have been isolated from freshwater and marine environments and described in pure culture 20,32,33,34,35,36.With the exception of

<h3>MICROBIOLOGY - Dairy Processing Handbook</h3>

MICROBIOLOGY - Dairy Processing Handbook

Such bacteria are called facultatively anaerobic. Anaerobic and facultatively anaerobic bacteria generally obtain their energy by fermentation of organic compounds. Chemically, this is an incomplete oxidation, whereby organic waste-products are formed, e.g. lactic acid from lactose, Table 4.2.

<h3>Biological hydrogen production - hi</h3>

Biological hydrogen production - hi

• Ethanol and Hydrogen Production by Two Thermophilic, Anaerobic Bacteria Isolated From Icelandic Geothermal Areas – Biotechnology and Bioengineering • Two bacterial strains were isolated from two sediment samples collected in the Krafla area (Víti=Hell) in NE-Iceland – AK15: 60°C; pH = 8.6 – AK17: 70°C; pH = 6.5

<h3>Frontiers | Microalgae: The Future Supply House of </h3>

Frontiers | Microalgae: The Future Supply House of

More specifically, there are photosynthetic system (PSII) dependence H 2 production pathway, nutrient deprivation H 2 production pathway (i.e., lack of sulfur, nitrogen, phosphorus and magnesium in the medium), and anaerobic biohydrogen production pathway under dark fermentation (Saroussi et al., 2017; Wirth et al., 2018; Suga et al., 2019; Li

<h3>Photosynthetic hydrogen production - ScienceDirect</h3>

Photosynthetic hydrogen production - ScienceDirect

Sep 01, 2010 · Biological production of hydrogen using photosynthesis may become a valuable alternative to chemical and electrochemical technologies. Firstly, sun energy and water are cheap and renewable energy sources. Secondly, burning H 2 is clean, emitting water as its end product, and a renewable process [3], [4]. Photosynthesis is at the basis of all

<h3>Integrated biological hydrogen production - ScienceDirect</h3>

Integrated biological hydrogen production - ScienceDirect

Sep 01, 2006 · The present work, although based on green algal H 2 production, nevertheless, seeks to enhance potential yields by developing an integrated process that combines and exploits the strengths of green algae, anoxygenic photosynthetic bacteria and dark anaerobic fermentative bacteria to achieve superior yields of H 2 production.