Southern California Baseline Study Draft Report High Molecular Weight Hydrocarbon Analyses In The Southern California Borderland And Appendices
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Southern California Baseline Study Draft Report High Molecular Weight Hydrocarbon Analyses In The Southern California Borderland And Appendices
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Author :
language : en
Publisher:
Release Date : 1976
Southern California Baseline Study Draft Report High Molecular Weight Hydrocarbon Analyses In The Southern California Borderland And Appendices written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Coastal ecology categories.
Southern California Baseline Study Draft Report High Molecular Weight Hydrocarbon Analyses In The Southern California Borderland And Appendices
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1976
Southern California Baseline Study Draft Report High Molecular Weight Hydrocarbon Analyses In The Southern California Borderland And Appendices written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Coastal ecology categories.
Southern California Baseline Study And Analysis 1975 1976 Principal Investigator Work Element Reports
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Author : Science Applications, inc
language : en
Publisher:
Release Date : 1978
Southern California Baseline Study And Analysis 1975 1976 Principal Investigator Work Element Reports written by Science Applications, inc and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Marine ecology categories.
Final Report
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Author : AeroVironment Inc
language : en
Publisher:
Release Date : 1978
Final Report written by AeroVironment Inc and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Air quality categories.
Southern California Offshore Air Quality Model Validation Study
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Author : Paolo Zannetti
language : en
Publisher:
Release Date : 1981
Southern California Offshore Air Quality Model Validation Study written by Paolo Zannetti and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Air quality categories.
Analysis Of Complex Polycyclic Hydrocarbon Mixtures Found In Particulate Matter Air Samples From The San Diego Tijuana Border Region Using Gcxgc Tofms
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Author :
language : en
Publisher:
Release Date : 2015
Analysis Of Complex Polycyclic Hydrocarbon Mixtures Found In Particulate Matter Air Samples From The San Diego Tijuana Border Region Using Gcxgc Tofms written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Electronic books categories.
Ambient air pollution, and more specifically particulate matter (PM), is a major concern for public health, causing 5% of all cardiopulmonary deaths worldwide. Research has demonstrated that the chemical composition of particulate matter plays a role in its toxicity. Polycyclic aromatic hydrocarbons (PAHs), some of which have known carcinogenic and toxic effects, and their oxygenated derivatives, are among the organic species found in particulate matter. Meteorological factors as well as sources of emission affect the chemical composition. This leads to variability in the composition of particulate matter by geographic region and by season. The cities of Tijuana, Baja California, Mexico and San Diego, California, USA are a part of the vast border region that deals with many environmental and public health concerns, one of which is air pollution. This study sought to investigate particulate matter in the region and obtain an initial fingerprint of the organic content. Specifically, the objectives of this study were to identify and characterize PAHs and related chemical contaminants using nontargeted analysis and select compounds for targeted and semi-targeted analysis, as well as identify interesting compounds for future study. Between July 2013 and February 2014, thirteen PM2.5 high-volume air samples were collected in Tijuana, Baja California, Mexico using a Tisch TE-6001 PM10 High-Vol Air Sampler. Samples were extracted with acetone and hexane in a MARS Xpress microwave system and eluted through silica gel columns with solvents of increasing polarity. Twodimensional gas chromatography coupled to time-of-flight mass spectrometry (GCxGC/TOFMS) was used to characterize PAHs and related compounds in the organic content of particulate matter samples from four sampling locations in Tijuana. A non-targeted approach was utilized to identify PAHs and other compounds of interest from two initial samples. Based on these results, targeted and semi-targeted methods were employed to quantify specific compounds in eleven samples. Average total PAH concentrations ranged from 0.658 ng/m3 (coastal site) to 6.44 ng/m3 (inland site). Winter total PAH levels detected at inland sampling sites were greater than winter concentrations observed in Southern California. In addition, benzo[a]pyrene, fluoranthene, benzo[a]anthracene, benzo[ghi]perylene, and chrysene were detected at higher levels than those observed in many Southern California cities. Total oxygenated polycyclic aromatic hydrocarbon (OPAH) concentrations averaged 0.326 ng/m3 at the coastal site and 0.938 ng/m3 at the site the furthest inland. The most prevalent OPAHs were 9,10-anthracenedione, naphthalic anhydride and 6H-benz[de]anthracen-6-one. A number of compounds not previously detected in PM were identified and quantified, including 6H-benz[de]anthracen-6-one, 4,4'- dichlorodiphenylsulfone, and podocarpa-8,11,13-trien-19-oic acid methyl ester. Further analysis is required in order to confirm trends between sites and compare levels in different seasons.
Deep Cut
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Author : Christine Keiner
language : en
Publisher: University of Georgia Press
Release Date : 2020-08
Deep Cut written by Christine Keiner and has been published by University of Georgia Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-08 with History categories.
HISTORY / Modern / 20th Century; SCIENCE / History; TECHNOLOGY & ENGINEERING / History.
Ocean Biogeochemistry
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Author : Michael J.R. Fasham
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Ocean Biogeochemistry written by Michael J.R. Fasham and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Oceans account for 50% of the anthropogenic CO2 released into the atmosphere. During the past 15 years an international programme, the Joint Global Ocean Flux Study (JGOFS), has been studying the ocean carbon cycle to quantify and model the biological and physical processes whereby CO2 is pumped from the ocean's surface to the depths of the ocean, where it can remain for hundreds of years. This project is one of the largest multi-disciplinary studies of the oceans ever carried out and this book synthesises the results. It covers all aspects of the topic ranging from air-sea exchange with CO2, the role of physical mixing, the uptake of CO2 by marine algae, the fluxes of carbon and nitrogen through the marine food chain to the subsequent export of carbon to the depths of the ocean. Special emphasis is laid on predicting future climatic change.
Micro Xrf Studies Of Sediment Cores
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Author : Ian W. Croudace
language : en
Publisher: Springer
Release Date : 2015-07-21
Micro Xrf Studies Of Sediment Cores written by Ian W. Croudace and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-07-21 with Science categories.
This volume presents papers on the use of micro-XRF core scanners in palaeoenvironmental research. It contains a broad ranging view of instrument capability and points to future developments that will help contribute to higher precision elemental data and faster core analysis. Readers will find a diverse range of research by leading experts that have used micro-XRF core scanners in a wide range of scientific applications. The book includes specific application papers reporting on the use of XRF core scanners in a variety of marine, lacustrine, and pollution studies. In addition, coverage also examines practical aspects of core scanner usage, data optimisation and data calibration and interpretation. In a little over a decade, micro-XRF sediment core scanners have made a substantive contribution to palaeoenvironmental research. Their impact is based on their ability to rapidly, non-destructively and automatically scan sediment cores. Not only do they rapidly provide important proxy data without damaging samples, but they can obtain environmental data at decadal, annual and even sub-annual scales. This volume will help both experienced and new users of these non-destructive core scanners take full advantage of one of the most powerful geochemical screening tools in the environmental scientist's toolbox.
Biogeochemistry Of Estuarine Sediments
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Author : Unesco
language : en
Publisher:
Release Date : 1978
Biogeochemistry Of Estuarine Sediments written by Unesco and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Biogeochemistry categories.