Fermentation of levoglucosan with oleaginous yeasts for lipid production

1. beta-Ionone vapour has been shown to cause an increase in the more saturated carotenes and a decrease in the less saturated carotenes of Rhodotorula glutinis. Lycopersene (dihydrophytoene) has been proposed as a precursor to phytoene. Attempts were made to isolate lycopersene from beta-ionone-treated cultures of R. glutinis. 2. Large samples of beta-ionone-treated cultures were examined for the presence of lycopersene. Spots were detected on silicic acid plates that could not be differentiated from synthetic lycopersene on the basis of column and thin-layer chromatographic separations and staining techniques. The lycopersene-like substance could be obtained from non-treated pigmented yeast as well as baker's yeast. 3. An extraction of bacterial-grade yeast extract also yielded a lycopersene-like substance. The extracts of R. glutinis cells cultured on media not containing yeast extract did not contain the lycopersene-like compound. 4. No significant carbon was incorporated into the lycopersene zone from (14)C-labelled mevalonate, acetate and glucose by R. glutinis and baker's yeast. 5. These results indicate that compounds may exist with chromatographic properties similar to lycopersene, but that lycopersene could not be detected in either a pigmented or a non-pigmented yeast.

Rhodotorula

Phytoene

Silicic acid

10.1042/bj1060311

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The primary products of cellulose pyrolysis in the absence of extraparticle reactions

Fuel (2018)

Jie Yu N. Paterson Marcos Millán

Levoglucosan

10.1016/j.fuel.2018.10.059

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Citations (34)

Mechanistic and kinetic investigation on maximizing the formation of levoglucosan from cellulose during biomass pyrolysis

Fuel (2020)

Alexander Shaw Xiaolei Zhang Lara Kabalan Jun Li

Levoglucosan

Depolymerization

10.1016/j.fuel.2020.119444

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Citations (15)

Influence of Interactions among Three Biomass Components on the Pyrolysis Behavior

Industrial & Engineering Chemistry Research (2018)

Shilin Zhao Meng Liu Liang Zhao Lingli Zhu

Pyrolysis experiments between 25 and 800 °C for three main components (cellulose, hemicellulose, and lignin) mixed in different proportions were conducted on a thermogravimetric analyzer (TGA) and pyrolysis–gas chromatography/mass spectrometer (Py-GC/MS). The interactions between the three main components during the pyrolysis of biomass were explored from two aspects, namely thermogravimetric properties and pyrolysis products. The results indicate that interactions existed among the three biomass components in the co-pyrolysis process. The presence of lignin significantly reduces the pyrolysis rate of cellulose and inhibits the formation of sugars (mainly levoglucosan) in the pyrolysis of cellulose and hemicellulose. However, the existence of cellulose or hemicellulose greatly promotes the pyrolysis of lignin to produce phenolic compounds. This finding is meaningful for the application of biomass pyrolysis.

Levoglucosan

Hemicellulose

Thermogravimetric analysis

10.1021/acs.iecr.8b00593

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Citations (89)

Investigations on the Phosphorous Metabolism in Rhodotorula gracilis. II. Phosphate and Phosphatide Amounts in Protein Yeast and Fat Yeast.

Acta chemica Scandinavica/Acta chemica Scandinavica. B, Organic chemistry and biochemistry/Acta chemica Scandinavica. A, Physical and inorganic chemistry/Acta chemica Scandinavica. Series B. Organic chemistry and biochemistry/Acta chemica Scandinavica. Series A, Physical and inorganic chemistry (1953)

N. G. Nilsson Niels Chr. Nielsen H. Lundin Artturi I. Virtanen Nils Andreas Sörensen

Rhodotorula

10.3891/acta.chem.scand.07-1067

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Citations (5)

Fundamental pyrolysis studies. Annual report FY 1982

Thomas A. Milne М. Н. Солтыс

Progress on the direct mass spectrometric sampling of pyrolysis products from wood and its constituents is described for FY 83. A brief summary, and references to detailed reports, of the qualitative demonstration of our approach to the study of the separated processes of primary and secondary pyrolysis is presented. Improvements and additions to the pyrolysis and data acquisition systems are discussed and typical results shown. Chief of these are a heated-grid pyrolysis system for controlled primary pyrolysis and a sheathed-flame arrangement for secondary cracking studies. Qualitative results of the secondary cracking of cellulose, lignin, and wood are shown as are comparisons with the literature for the pyrolysis spectra of cellulose, lignin, and levoglucosan.

Levoglucosan

Primary (astronomy)

Source

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