Particulate matter was measured in Conroe, Texas (~60 km north of downtown Houston, Texas) during the September 2013 DISCOVER-AQ campaign to determine the sources of particulate matter in the region. The measurement site is influenced by high biogenic emission rates as well as transport of anthropogenic pollutants from the Houston metropolitan area and is therefore an ideal location to study anthropogenic-biogenic interactions. Data from an Aerosol Chemical Speciation Monitor (ACSM) suggest that on average 64 percent of non-refractory PM1 was organic material, including a high fraction (27%–41%) of organic nitrates. There was little diurnal variation in the concentrations of ammonium sulfate; however, concentrations of organic and organic nitrate aerosol were consistently higher at night than during the day. Potential explanations for the higher organic aerosol loadings at night include changing boundary layer height, increased partitioning to the particle phase at lower temperatures, and differences between daytime and nighttime chemical processes such as nitrate radical chemistry. Positive matrix factorization was applied to the organic aerosol mass spectra measured by the ACSM and three factors were resolved—two factors representing oxygenated organic aerosol and one factor representing hydrocarbon-like organic aerosol. The factors suggest that the measured aerosol was well mixed and highly processed, consistent with the distance from the site to major aerosol sources, as well as the high photochemical activity.
from #Medicine via ola Kala on Inoreader http://ift.tt/27QmDtA
via IFTTT
Αρχειοθήκη ιστολογίου
-
►
2023
(138)
- ► Φεβρουαρίου (74)
- ► Ιανουαρίου (64)
-
►
2022
(849)
- ► Δεκεμβρίου (61)
- ► Σεπτεμβρίου (74)
- ► Φεβρουαρίου (65)
-
►
2021
(2936)
- ► Δεκεμβρίου (59)
- ► Σεπτεμβρίου (180)
- ► Φεβρουαρίου (325)
-
►
2020
(1624)
- ► Δεκεμβρίου (293)
- ► Σεπτεμβρίου (234)
- ► Φεβρουαρίου (28)
-
►
2019
(13362)
- ► Δεκεμβρίου (19)
- ► Σεπτεμβρίου (54)
- ► Φεβρουαρίου (5586)
- ► Ιανουαρίου (5696)
-
►
2018
(66471)
- ► Δεκεμβρίου (5242)
- ► Σεπτεμβρίου (5478)
- ► Φεβρουαρίου (4835)
- ► Ιανουαρίου (5592)
-
►
2017
(44259)
- ► Δεκεμβρίου (5110)
- ► Σεπτεμβρίου (5105)
-
▼
2016
(7467)
- ► Δεκεμβρίου (514)
- ► Σεπτεμβρίου (1038)
-
▼
Μαΐου
(630)
-
▼
Μαΐ 23
(32)
- Viruses, Vol. 8, Pages 139: Deletion of A44L, A46R...
- Monitoring Drug-Lipid Membrane Interactions via Mo...
- Preventing cancer with lifestyle counseling
- Sensors, Vol. 16, Pages 748: A Review of Distribut...
- Remote Sensing, Vol. 8, Pages 436: Hierarchical Co...
- Sensors, Vol. 16, Pages 752: An Improved Measureme...
- IJMS, Vol. 17, Pages 791: Circulating MicroRNAs as...
- Computers, Vol. 5, Pages 9: Video over DSL with LD...
- IJMS, Vol. 17, Pages 792: A Novel Technique to Det...
- Remote Sensing, Vol. 8, Pages 435: Impact of Satel...
- Viruses, Vol. 8, Pages 145: Experimental Infection...
- IJMS, Vol. 17, Pages 795: Cold-Induced Browning Dy...
- IJMS, Vol. 17, Pages 771: Analysis of 2-(2-Phenyle...
- IJMS, Vol. 17, Pages 795: Cold-Induced Browning Dy...
- IJMS, Vol. 17, Pages 791: Circulating MicroRNAs as...
- IJMS, Vol. 17, Pages 793: The Role of Proanthocyan...
- IJMS, Vol. 17, Pages 794: Gibberellic Acid: A Key ...
- IJMS, Vol. 17, Pages 793: The Role of Proanthocyan...
- IJMS, Vol. 17, Pages 794: Gibberellic Acid: A Key ...
- Symmetry, Vol. 8, Pages 37: Optional Frame Selecti...
- IJERPH, Vol. 13, Pages 520: Antifungal Effect of H...
- Atmosphere, Vol. 7, Pages 73: Composition and Sour...
- Water, Vol. 8, Pages 216: Opening the Black Box: U...
- IJMS, Vol. 17, Pages 771: Analysis of 2-(2-Phenyle...
- Biology, Vol. 5, Pages 22: Effect of Different Bro...
- Molecules, Vol. 21, Pages 679: New Casbane and Cem...
- Steamed and Fermented Ethanolic Extract from Codon...
- Implementing Pharmacogenomics at Your Institution:...
- Cancers, Vol. 8, Pages 52: The MYC 3′ Wnt-Responsi...
- Atmosphere, Vol. 7, Pages 71: The Effect of Season...
- Coatings, Vol. 6, Pages 21: The Acoustical Durabil...
- Metals, Vol. 6, Pages 122: Hydrometallurgy
-
▼
Μαΐ 23
(32)
- ► Φεβρουαρίου (793)
Αναζήτηση αυτού του ιστολογίου
Εγγραφή σε:
Σχόλια ανάρτησης (Atom)
-
Αλέξανδρος Γ. Σφακιανάκης Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,0030693260717...
-
heory of COVID-19 pathogenesis Publication date: November 2020Source: Medical Hypotheses, Volume 144Author(s): Yuichiro J. Suzuki ScienceD...
-
https://ift.tt/2MQ8Ai8
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου
Σημείωση: Μόνο ένα μέλος αυτού του ιστολογίου μπορεί να αναρτήσει σχόλιο.