256. Detecting Non-Culturable Air Biocontamination: Direct Quantitative Sampling of Indoor Air Biomass by Lipid Biomarker Analysis

1999 ◽  
Author(s):  
S. MacNaughton
Keyword(s):  
Indoor Air ◽  
Quantitative Sampling ◽  
Lipid Biomarker ◽  
Biomarker Analysis

Quantitative Sampling of Indoor Air Biomass by Signature Lipid Biomarker Analysis: Feasibility Studies in a Model System

AIHAJ ◽  
1997 ◽  
Vol 58 (4) ◽  
pp. 270-277 ◽  
Author(s):  
S. J. Macnaughton ◽  
T. L. Jenkins ◽  
S. Alugupalli ◽  
D. C. White
Keyword(s):  
Indoor Air ◽  
Feasibility Studies ◽  
Model System ◽  
Quantitative Sampling ◽  
Lipid Biomarker ◽  
Biomarker Analysis

Quantitative sampling of indoor air biomass by signature lipid biomarker analysis

1999 ◽  
Vol 22 (2) ◽  
pp. 80-87 ◽  
Author(s):  
S J Macnaughton ◽  
M R Cormier ◽  
T L Jenkins ◽  
G A Davis ◽  
D C White
Keyword(s):  
Indoor Air ◽  
Quantitative Sampling ◽  
Lipid Biomarker ◽  
Biomarker Analysis

scholarly journals Analyses of depositional environments of the Marcellus formation in New York using biomarker and trace metal proxies

2021 ◽  
Author(s):  
Reilly M. Blocho ◽  
Richard W. Smith ◽  
Mark R. Noll
Keyword(s):  
Fatty Acids ◽  
New York ◽  
Organic Matter ◽  
New York State ◽  
Depositional Environments ◽  
Average Chain Length ◽  
Lipid Biomarker ◽  
Two Samples ◽  
Biomarker Analysis ◽  
Marcellus Formation

AbstractThe purpose of this study was to observe how the composition of organic matter (OM) and the extent of anoxia during deposition within the Marcellus Formation in New York varied by distance from the sediment source in eastern New York. Lipid biomarkers (n-alkanes and fatty acids) in the extractable organic component (bitumen) of the shale samples were analyzed, and proxies such as the average chain length (ACL), aquatic to terrestrial ratio (ATR) and carbon preference index (CPI) of n-alkanes were calculated. Fatty acids were relatively non-abundant due to the age of the shale bed, but n-alkane distributions revealed that the primary component of the OM was terrigenous plants. The presence of shorter n-alkane chain lengths in the samples indicated that there was also a minor component of phytoplankton and algal (marine) sourced OM. Whole rock analyses were also conducted, and cerium anomalies were calculated as a proxy for anoxia. All samples had a negative anomaly value, indicating anoxic conditions during deposition. Two samples, however, contained values close to zero and thus were determined to have suboxic conditions. Anoxia and total organic matter (TOM) did not show any spatial trends across the basin, which may be caused by varying depths within the basin during deposition. A correlation between nickel concentrations and TOM was observed and indicates that algae was the primary source of the marine OM, which supports the lipid biomarker analysis. It was determined that the kerogen type of the Marcellus Formation in New York State is type III, consistent with a methane-forming shale bed.

scholarly journals Microbial signature lipid biomarker analysis - an approach that is still preferred, even amid various method modifications

2015 ◽  
Vol 118 (6) ◽  
pp. 1251-1263 ◽  
Author(s):  
C. Willers ◽  
P.J. Jansen van Rensburg ◽  
S. Claassens
Keyword(s):  
Lipid Biomarker ◽  
Biomarker Analysis

scholarly journals Micrometer scale imaging of sedimentary climate archives – Sample preparation for combined elemental and lipid biomarker analysis

2019 ◽  
Vol 127 ◽  
pp. 81-91 ◽  
Author(s):  
Susanne Alfken ◽  
Lars Wörmer ◽  
Julius S. Lipp ◽  
Jenny Wendt ◽  
Heidi Taubner ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Lipid Biomarker ◽  
Biomarker Analysis ◽  
Micrometer Scale

Aquatic Resources in Foodcrusts: Identification and Implication

Radiocarbon ◽  
2015 ◽  
Vol 57 (4) ◽  
pp. 707-719 ◽  
Author(s):  
Carl Heron ◽  
Oliver E Craig
Keyword(s):  
Radiocarbon Dating ◽  
Isotopic Analysis ◽  
Aquatic Resources ◽  
Carbon And Nitrogen ◽  
Lipid Biomarker ◽  
Biomarker Analysis ◽  
Compound Specific Carbon Isotope ◽  
Analytical Approaches ◽  
Isotope Measurements ◽  
Selection Of

Foodcrusts, the charred surface deposits on pottery vessel surfaces, provide a rich source of data regarding container function. This article reviews recent applications focusing on the detection of aquatic resources (marine and freshwater) in pottery vessels using a range of analytical approaches including bulk isotope measurements of carbon and nitrogen, lipid biomarker analysis, and compound-specific carbon isotope determinations. Such data can help to evaluate the presence of reservoir effects when undertaking radiocarbon dating of foodcrust samples. In particular, molecular and isotopic analysis can aid in the selection of suitable candidates for14C where it can be demonstrated that aquatic resources are unlikely to contribute to the residue. Prospects for compound-specific14C analysis of lipids in foodcrusts and ceramic-absorbed residues are also discussed.

scholarly journals Organic carbon characteristics in yedoma and thermokarst deposits on Baldwin Peninsula, West-Alaska

2018 ◽  
Author(s):  
Loeka L. Jongejans ◽  
Jens Strauss ◽  
Josefine Lenz ◽  
Francien Peterse ◽  
Kai Mangelsdorf ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Lake Sediments ◽  
Lake Basin ◽  
Study Region ◽  
Thermokarst Lake ◽  
Discontinuous Permafrost ◽  
Lipid Biomarker ◽  
Biomarker Analysis ◽  
Thawing Permafrost

Abstract. As Arctic warming continues and permafrost thaws, more soil and sedimentary organic carbon (OC) will be decomposed in northern high latitudes. Still, uncertainties remain in the quantity and quality of OC stored in different deposit types of permafrost landscapes. This study presents OC data from deep permafrost and lake deposits on the Baldwin Peninsula which is located in the southern portion of the continuous permafrost zone in West Alaska. Sediment samples from yedoma and drained thermokarst lake basin (DTLB) deposits as well as thermokarst lake sediments were analyzed for cryostratigraphical and biogeochemical parameters and their lipid biomarker composition to identify the size and quality of belowground OC pools in ice-rich permafrost on Baldwin Peninsula. We provide the first detailed characterization of yedoma deposits on Baldwin Peninsula. We show that three quarters of soil organic carbon in the frozen deposits of the study region (total of 68 Mt) is stored in DTLB deposits (52 Mt) and one quarter in the frozen yedoma deposits (16 Mt). The lake sediments contain a relatively small OC pool (4 Mt), but have the highest volumetric OC content (93 kg/m3) compared to the DTLB (35 kg/m3) and yedoma deposits (8 kg/m3), largely due to differences in the ground ice content. The biomarker analysis indicates that the OC in both yedoma and DTLB deposits is mainly of terrestrial origin. Nevertheless, the relatively high carbon preference index of plant leaf waxes in combination with a lack of degradation trend with depth in the yedoma deposits indicates that OC stored in yedoma is less degraded than that stored in DTLB deposits. This suggests that OC in yedoma has a higher potential for decomposition upon thaw, despite the relatively small size of this pool. These findings highlight the importance of molecular OC analysis for determining the potential future greenhouse gas emissions from thawing permafrost, especially because this area close to the discontinuous permafrost boundary is projected to thaw substantially within the 21st century.

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