Results 21 to 30 of about 200,132 (163)

Bio-oxidation of H2S by Sulfolobus metallicus

Biotechnology Letters, 2011
Sulfolobus metallicus is a hyperthermophilic and chemolithoautotrophic archaeon that uses elemental sulfur as an energy source. Its ability to oxidize H(2)S was measured either in the presence or absence of elemental sulphur, showing its ability for using both as an energy source. A biotrickling filter was set up and a biofilm of S.
Morales, Marjorie, Arancibia, Jonathan, Lemus, Mariana, Silva, Javier, Gentina, Juan Carlos, Aroca, German   +5 more
openaire   +4 more sources

Exploring Effective Bio-Cover Materials for Mitigating Methane Emission at a Tropical Landfill

Applied Sciences, 2023
Methane emission and oxidation in different bio-cover materials, i.e., sandy loam, compost, and stabilized wastes, were investigated at a municipal solid waste landfill in Thailand.
Rathborey Chan, Wilai Chiemchaisri, Chart Chiemchaisri   +2 more
doaj   +1 more source

Deracemisierung durch simultane bio‐oxidative Racematspaltung und Stereoinversion [PDF]

Angewandte Chemie, 2014
AbstractDeracemisierung, also die Umwandlung eines Racemats in ein enantiomerenreines Produkt mit theoretisch 100 % Ausbeute und 100 % ee, stellt eine attraktive, aber auch anspruchsvolle Option für die asymmetrische Synthese dar. Hier beschreiben wir ein neuartiges Konzept einer chemo‐enzymatischen Deracemisierung mittels einer Kaskadenreaktion.
Joerg H. Schrittwieser, Bas Groenendaal, Verena Resch, Diego Ghislieri, Silvia Wallner, Eva‐Maria Fischereder, Elisabeth Fuchs, Barbara Grischek, Johann H. Sattler, Peter Macheroux, Nicholas J. Turner, Wolfgang Kroutil   +11 more
openaire   +1 more source

Prerequisites for Processing a Foam Product in the Process of Bacterial Oxidation of Gold-Bearing Concentrates in a Separate Cycle [PDF]

E3S Web of Conferences, 2021
The recovery of gold from refractory ores and concentrates is a significant problem in the modern gold processing industry. The use of bacterial oxidation technology at the Navoi Mining and Metallurgical Combine (Uzbekistan) made it possible to increase ...
Khamidov Rustam, Narzullayev Zhakhongir, Kuznetsov Evgeniy   +2 more
doaj   +1 more source

Specific Refractory Gold Flotation and Bio-Oxidation Products: Research Overview [PDF]

Minerals, 2021
This paper presents a research overview, reconciling key and useful case study findings, towards uncovering major causes of gold refractoriness and maximising extraction performance of specific gold flotation and bio-oxidation products. Through systematic investigation of the ore mineralogical and gold deportment properties, leaching mechanisms, and ...
openaire   +2 more sources

Co-digestion of Sorghum Stalk and Sludge for Biogas Production

Makara Journal of Science, 2015
The recycling of residual agricultural biomass using anaerobic digestion allows for the recovery of biomass carbon and nutrients as sources of energy and fertilizer. The obstacles that are encountered in this process include the lignocellulosic structure
Muhammad Romli, Aulia Anggraini, Purwoko Purwoko, Suprihatin Suprihatin   +3 more
doaj   +1 more source

Monitoring polythionate bio-oxidation by conductivity measurement

Minerals Engineering, 2016
Polythionates are formed by the incomplete oxidation of sulphide minerals in the grinding and flotation circuits, and particularly of those containing pyrite. Polythionate levels in the recycling water must be adjusted; otherwise, it can affect metal recoveries.
Montes Rosua, Cristina, Iglesias González, María Nieves, Romero Aleta, Rafael, Mazuelos Rojas, Alfonso, Carranza Mora, Francisco   +4 more
openaire   +3 more sources

Biostimulant Potential of Humic Acids Extracted From an Amendment Obtained via Combination of Olive Mill Wastewaters (OMW) and a Pre-treated Organic Material Derived From Municipal Solid Waste (MSW)

Frontiers in Plant Science, 2018
Olive mill wastewaters (OMW) contain significant levels of phenolic compounds with antimicrobial/phytotoxic activity and high amounts of undecomposed organic matter that may exert negative effects on soil biology.
Giuseppe Palumbo, Michela Schiavon, Serenella Nardi, Andrea Ertani, Giuseppe Celano, Claudio M. Colombo   +5 more
doaj   +1 more source

Pool bio-oxidation and fitting analysis of low-grade arsenic-containing refractory gold ore

Green Chemical Engineering
To overcome the limitations of geography, climate, and ore characteristics on the ore beneficiation process, bio-oxidation studies on low-grade arsenic-bearing refractory gold ore by pool leaching were carried out, as well as process fitting analysis ...
Jiafeng Li, Linlin Tong, Haijun Zhang, Qiao Chen, Hongying Yang, Lingling Shen, Yiqin Zhai, Rongfan Yao   +7 more
doaj   +1 more source

The Use of Raman Spectroscopy to Monitor Changes in the Intensity of Ratio of Integral Unsaturated Bands in Bio-Greases

Molecules, 2023
Bio-greases were developed on the basis of vegetable oil obtained from Crambe Abyssinic seeds. An important aspect of this research is to monitor changes in their quality taking place under the influence of external factors.
Jolanta Drabik, Bernadetta Kaźmierczak, Rafał Kozdrach, Elżbieta Rogoś   +3 more
doaj   +1 more source