scholarly journals Pelagibacter metabolism of diatom‐derived volatile organic compounds imposes an energetic tax on photosynthetic carbon fixation

2019 ◽  
Vol 22 (5) ◽  
pp. 1720-1733 ◽  
Author(s):  
Eric R. Moore ◽  
Cleo L. Davie‐Martin ◽  
Stephen J. Giovannoni ◽  
Kimberly H. Halsey
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Carbon Fixation ◽  
Photosynthetic Carbon Fixation ◽  
Volatile Organic ◽  
Photosynthetic Carbon

Volatile organic compounds in barite-hosted fluid inclusions from the 3.5 Ga old Dresser Formation, Western Australia

2020 ◽  
Author(s):  
Volker Thiel ◽  
Jan-Peter Duda ◽  
Alfons M. van den Kerkhof ◽  
Joachim Reitner ◽  
Helge Mißbach
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Western Australia ◽  
Fluid Inclusions ◽  
Carbon Fixation ◽  
Solid Phase ◽  
Inorganic Compounds ◽  
Wide Range ◽  
Volatile Organic ◽  
Artefact Formation

<p>The c. 3.5 Ga Dresser Formation of the East Pilbara Craton (Western Australia) contains large amounts of blackish barite. These rocks produce an intense sulfidic odor when crushed, resulting from abundant primary fluid inclusions. In part, the black barites are interbedded with sulfidic stromatolites. Using Raman spectroscopy, microthermometry, and two different online GC–MS approaches, we characterized in detail the chemical composition of the barite-hosted fluid inclusions. Our GC–MS techniques were based on (i) thermodecrepitation at 150-250°C and (ii) solid phase microextraction (SPME)–GC–MS at reduced temperature (50°C), thereby minimizing external contamination and artefact formation. Major fluid inclusion classes yielded mainly H<sub>2</sub>O, CO<sub>2</sub>, and H<sub>2</sub>S in varying abundance, along with minor amounts of COS and  CS<sub>2</sub>, N<sub>2</sub>, and CH<sub>4</sub> (< 1%). Notably, we also detected a wide range of volatile organic compounds, including short–chain ketones and aldehydes, thiophenes, and various organic (poly)sulfides. Some of these compounds (CH<sub>3</sub>SH, acetic acid) have previously been invoked as initials agents for carbon fixation under primordial conditions, but up to now their presence had not been observed in Precambrian materials. Based on our findings, we hypothesize that hydrothermal seepage of organic and inorganic compounds during Dresser times provided both, catabolic and anabolic substrates for early microbial metabolisms.</p>

Sectioned rubisco crystals in TEM

1990 ◽  
Vol 48 (3) ◽  
pp. 664-665
Author(s):  
Gunnel Karlsson ◽  
Jan-Olov Bovin ◽  
Michael Bosma
Keyword(s):  
Plant Cell ◽  
Carbon Fixation ◽  
Unit Cell ◽  
Protein Crystals ◽  
Unit Cell Parameters ◽  
Cell Parameters ◽  
Photosynthetic Carbon Fixation ◽  
Photosynthetic Carbon

RuBisCO (D-ribulose-l,5-biphosphate carboxylase/oxygenase) is the most aboundant enzyme in the plant cell and it catalyses the key carboxylation reaction of photosynthetic carbon fixation, but also the competing oxygenase reaction of photorespiation. In vitro crystallized RuBisCO has been studied earlier but this investigation concerns in vivo existance of RuBisCO crystals in anthers and leaves ofsugarbeets. For the identification of in vivo protein crystals it is important to be able to determinethe unit cell of cytochemically identified crystals in the same image. In order to obtain the best combination of optimal contrast and resolution we have studied different staining and electron accelerating voltages. It is known that embedding and sectioning can cause deformation and obscure the unit cell parameters.

232. Volatile Organic Compounds Generated From Artificial Butter Flavors in Microwave Popcorn Production

2003 ◽  
Author(s):  
R. Boylstein ◽  
C. Piacitelli ◽  
G. Kullman ◽  
A. Grote
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Volatile Organic

26. Determinants of Exposure to Volatile Organic Compounds in Ambient Air: The Oklahoma Urban Air Toxics Study

2003 ◽  
Author(s):  
M. Phillips ◽  
N. Esmen ◽  
R. Lynch ◽  
D. Johnson ◽  
T. Hall
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Ambient Air ◽  
Urban Air ◽  
Air Toxics ◽  
Volatile Organic ◽  
Urban Air Toxics

Generation characteristics of airborne fungi and fungal volatile organic compounds in single person households

2017 ◽  
Vol 16 (3) ◽  
pp. 259-264 ◽  
Author(s):  
Rina Kim ◽  
◽  
Sungchul Seo ◽  
Joung-Dae Kim ◽  
Daekeun Kim
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Airborne Fungi ◽  
Single Person ◽  
Volatile Organic

Absorption comparison of absorbents to remove volatile organic compounds emitted from printing and publishing industry

2019 ◽  
Vol 18 (1) ◽  
pp. 44-54 ◽  
Author(s):  
Jeonghee Yun ◽  
Yoonjoo Seo ◽  
Shi-nae Jang ◽  
Kyung-Suk Cho
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Publishing Industry ◽  
Volatile Organic
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