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  1. Book ; Online: Atmospheric Measurements with Unmanned Aerial Systems (UAS)

    Guzman, Marcelo

    2021  

    Keywords Research & information: general ; unmanned aerial vehicles (UAV) ; drones ; geostatistics ; atmospheric physics ; meteorology ; spatial sampling ; unmanned aerial vehicles ; unmanned aerial systems, turbulence ; atmospheric boundary layer ; TK-1G sounding rocket ; near space ; data analysis ; remote sensing ; unmanned aerial systems ; atmospheric composition ; sensors ; UAS ; RPAS ; ALADINA ; airborne turbulence ; radiation measurements ; aerosol measurements ; field experiments ; validation methods ; unmanned aircraft ; meteorological observation ; stable atmospheric boundary layer ; turbulence ; remotely piloted aircraft systems (RPAS) ; ground-based in-situ observations ; boundary layer remote sensing ; Arctic ; polar ; sea ice ; n/a ; source estimation ; methane emissions ; natural gas ; leak surveys ; inverse emissions ; MONITOR ; UAV ; LDAR ; air pollution ; unmanned aerial vehicle (UAV) ; PM2.5 ; meteorological condition ; long-distance transport ; satellite data ; RMLD-UAV ; methane ; mass flux ; leak rate quantification ; wind speed and direction estimation algorithms ; flow probes ; airspeed measurement ; small unmanned aircraft systems (sUAS)
    Size 1 electronic resource (248 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Publishing place Basel, Switzerland
    Document type Book ; Online
    Note English ; Open Access
    HBZ-ID HT021044105
    ISBN 9783039439867 ; 3039439863
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: An overview of the effect of bioaerosol size in coronavirus disease 2019 transmission.

    Guzman, Marcelo I

    The International journal of health planning and management

    2020  Volume 36, Issue 2, Page(s) 257–266

    Abstract: The fast spread of coronavirus disease 2019 (COVID-19) constitutes a worldwide challenge to the public health, educational and trade systems, affecting the overall well-being of human societies. The high transmission and mortality rates of this virus, ... ...

    Abstract The fast spread of coronavirus disease 2019 (COVID-19) constitutes a worldwide challenge to the public health, educational and trade systems, affecting the overall well-being of human societies. The high transmission and mortality rates of this virus, and the unavailability of a vaccine or treatment, resulted in the decision of multiple governments to enact measures of social distancing. Such measures can reduce the exposure to bioaerosols, which can result in pathogen deposition in the respiratory tract of the host causing disease and an immunological response. Thus, it is important to consider the validity of the proposal for keeping a distance of at least 2 m from other persons to avoid the spread of COVID-19. This work reviews the effect of aerodynamic diameter (size) of particles carrying RNA copies of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). A SARS-CoV-2 carrier person talking, sneezing or coughing at distance of 2 m can still provide a pathogenic bioaerosol load with submicron particles that remain viable in air for up to 3 h for exposure of healthy persons near and far from the source in a stagnant environment. The deposited bioaerosol creates contaminated surfaces, which if touched can act as a path to introduce the pathogen by mouth, nose or eyes and cause disease.
    MeSH term(s) Aerosols/adverse effects ; COVID-19/transmission ; Humans ; Particle Size ; RNA, Viral/adverse effects ; Respiratory System/virology ; SARS-CoV-2/pathogenicity ; SARS-CoV-2/ultrastructure
    Chemical Substances Aerosols ; RNA, Viral
    Language English
    Publishing date 2020-12-08
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 632786-2
    ISSN 1099-1751 ; 0749-6753
    ISSN (online) 1099-1751
    ISSN 0749-6753
    DOI 10.1002/hpm.3095
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2897: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  3. Article: Oxidation of Phenolic Aldehydes by Ozone and Hydroxyl Radicals at the Air-Solid Interface.

    Rana, Md Sohel / Guzman, Marcelo I

    ACS earth & space chemistry

    2022  Volume 6, Issue 12, Page(s) 2900–2909

    Abstract: Biomass burning emissions contain abundant phenolic aldehydes (e.g., syringaldehyde, vanillin, and 4-hydroxybenaldehyde) that are oxidized during atmospheric transport, altering the physicochemical properties of particulates. Herein, the oxidative ... ...

    Abstract Biomass burning emissions contain abundant phenolic aldehydes (e.g., syringaldehyde, vanillin, and 4-hydroxybenaldehyde) that are oxidized during atmospheric transport, altering the physicochemical properties of particulates. Herein, the oxidative processing of thin films made of syringaldehyde, vanillin, and 4-hydroxybenaldehyde is studied at the air-solid interface under a variable O
    Language English
    Publishing date 2022-11-18
    Publishing country United States
    Document type Journal Article
    ISSN 2472-3452
    ISSN 2472-3452
    DOI 10.1021/acsearthspacechem.2c00206
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Oxidation of Catechols at the Air-Water Interface by Nitrate Radicals.

    Rana, Md Sohel / Guzman, Marcelo I

    Environmental science & technology

    2022  Volume 56, Issue 22, Page(s) 15437–15448

    Abstract: Abundant substituted catechols are emitted to, and created in, the atmosphere during wildfires and anthropogenic combustion and agro-industrial processes. While ozone ( ... ...

    Abstract Abundant substituted catechols are emitted to, and created in, the atmosphere during wildfires and anthropogenic combustion and agro-industrial processes. While ozone (O
    MeSH term(s) Nitrates ; Water/chemistry ; Nitrogen Oxides ; Oxidation-Reduction ; Catechols/chemistry
    Chemical Substances Nitrates ; Water (059QF0KO0R) ; Nitrogen Oxides ; nitrocatechol ; Catechols
    Language English
    Publishing date 2022-11-01
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5851
    ISSN (online) 1520-5851
    DOI 10.1021/acs.est.2c05640
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Surface Oxidation of Phenolic Aldehydes: Fragmentation, Functionalization, and Coupling Reactions.

    Rana, Md Sohel / Guzman, Marcelo I

    The journal of physical chemistry. A

    2022  Volume 126, Issue 37, Page(s) 6502–6516

    Abstract: Substantial amounts of phenolic aldehydes, represented by the structures of syringaldehyde, vanillin, and 4-hydroxybenzaldehyde, are emitted to the atmosphere during biomass burning. The oxidative transformation of phenolic aldehydes during atmospheric ... ...

    Abstract Substantial amounts of phenolic aldehydes, represented by the structures of syringaldehyde, vanillin, and 4-hydroxybenzaldehyde, are emitted to the atmosphere during biomass burning. The oxidative transformation of phenolic aldehydes during atmospheric transport has the potential to modify the physicochemical properties of particulates, which play a vital role in Earth's climate and human health. Herein, thin solid films made of syringaldehyde, vanillin, and 4-hydroxybenzaldehyde are oxidized in contact with O
    MeSH term(s) 2-Propanol ; Aerosols ; Aged ; Aldehydes ; Benzaldehydes ; Carboxylic Acids ; Esters ; Formates ; Humans ; Maleates ; Oxalates ; Phenols
    Chemical Substances Aerosols ; Aldehydes ; Benzaldehydes ; Carboxylic Acids ; Esters ; Formates ; Maleates ; Oxalates ; Phenols ; syringaldehyde (2ZR01KTT21) ; maleic acid (91XW058U2C) ; vanillin (CHI530446X) ; 2-Propanol (ND2M416302) ; 4-hydroxybenzaldehyde (O1738X3Y38)
    Language English
    Publishing date 2022-09-07
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5215
    ISSN (online) 1520-5215
    DOI 10.1021/acs.jpca.2c04963
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Aqueous Photochemistry of 2-Oxocarboxylic Acids: Evidence, Mechanisms, and Atmospheric Impact.

    Guzman, Marcelo I / Eugene, Alexis J

    Molecules (Basel, Switzerland)

    2021  Volume 26, Issue 17

    Abstract: Atmospheric organic aerosols play a major role in climate, demanding a better understanding of their formation mechanisms by contributing multiphase chemical reactions with the participation of water. The sunlight driven aqueous photochemistry of small 2- ...

    Abstract Atmospheric organic aerosols play a major role in climate, demanding a better understanding of their formation mechanisms by contributing multiphase chemical reactions with the participation of water. The sunlight driven aqueous photochemistry of small 2-oxocarboxylic acids is a potential major source of organic aerosol, which prompted the investigations into the mechanisms of glyoxylic acid and pyruvic acid photochemistry reviewed here. While 2-oxocarboxylic acids can be contained or directly created in the particles, the majorities of these abundant and available molecules are in the gas phase and must first undergo the surface uptake process to react in, and on the surface, of aqueous particles. Thus, the work also reviews the acid-base reaction that occurs when gaseous pyruvic acid meets the interface of aqueous microdroplets, which is contrasted with the same process for acetic acid. This work classifies relevant information needed to understand the photochemistry of aqueous pyruvic acid and glyoxylic acid and motivates future studies based on reports that use novel strategies and methodologies to advance this field.
    Language English
    Publishing date 2021-08-31
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules26175278
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.MO 81: Show issues

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  7. Article ; Online: The Controlled Release of Abscisic Acid (ABA) Utilizing Alginate-Chitosan Gel Blends: A Synergistic Approach for an Enhanced Small-Molecule Delivery Controller.

    Valdes, Oscar / Bustos, Daniel / Guzmán, Luis / Muñoz-Vera, Marcelo / Urra, Gabriela / Castro, Ricardo I / Morales-Quintana, Luis

    Gels (Basel, Switzerland)

    2024  Volume 10, Issue 3

    Abstract: The integration of abscisic acid (ABA) into a chitosan-alginate gel blend unveils crucial insights into the formation and stability of these two substances. ABA, a key phytohormone in plant growth and stress responses, is strategically targeted for ... ...

    Abstract The integration of abscisic acid (ABA) into a chitosan-alginate gel blend unveils crucial insights into the formation and stability of these two substances. ABA, a key phytohormone in plant growth and stress responses, is strategically targeted for controlled release within these complexes. This study investigates the design and characterization of this novel controlled-release system, showcasing the potential of alginate-chitosan gel blends in ABA delivery. Computational methods, including molecular dynamics simulations, are employed to analyze the structural effects of microencapsulation, offering valuable insights into complex behavior under varying conditions. This paper focuses on the controlled release of ABA from these complexes, highlighting its strategic importance in drug delivery systems and beyond. This controlled release enables targeted and regulated ABA delivery, with far-reaching implications for pharmaceuticals, agriculture, and plant stress response studies. While acknowledging context dependency, the paper suggests that the liberation or controlled release of ABA holds promise in applications, urging further research and experimentation to validate its utility across diverse fields. Overall, this work significantly contributes to understanding the characteristics and potential applications of chitosan-alginate complexes, marking a noteworthy advancement in the field of controlled-release systems.
    Language English
    Publishing date 2024-03-08
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2813982-3
    ISSN 2310-2861 ; 2310-2861
    ISSN (online) 2310-2861
    ISSN 2310-2861
    DOI 10.3390/gels10030185
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Interfacial Oxidative Oligomerization of Catechol.

    Guzman, Marcelo I / Pillar-Little, Elizabeth A / Eugene, Alexis J

    ACS omega

    2022  Volume 7, Issue 40, Page(s) 36009–36016

    Abstract: The heterogeneous reaction between thin films of catechol exposed to ... ...

    Abstract The heterogeneous reaction between thin films of catechol exposed to O
    Language English
    Publishing date 2022-09-22
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.2c05290
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: In Situ Electrochemistry of Formate on Cu Thin Films Using ATR-FTIR Spectroscopy and X-ray Photoelectron Spectroscopy.

    Hsu, Jason / Houache, Mohamed S E / Abu-Lebdeh, Yaser / Patton, Reagan A / Guzman, Marcelo I / Al-Abadleh, Hind A

    Langmuir : the ACS journal of surfaces and colloids

    2024  Volume 40, Issue 4, Page(s) 2377–2384

    Abstract: ... Formate ( ... ...

    Abstract Formate (HCOO
    Language English
    Publishing date 2024-01-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.3c03660
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Oxidation of Phenolic Aldehydes by Ozone and Hydroxyl Radicals at the Air-Water Interface.

    Rana, Md Sohel / Guzman, Marcelo I

    The journal of physical chemistry. A

    2020  Volume 124, Issue 42, Page(s) 8822–8833

    Abstract: Biomass burning releases highly reactive methoxyphenols into the atmosphere, which can undergo heterogeneous oxidation and act as precursors for secondary organic aerosol (SOA) formation. Understanding the reactivity of such methoxyphenols at the air- ... ...

    Abstract Biomass burning releases highly reactive methoxyphenols into the atmosphere, which can undergo heterogeneous oxidation and act as precursors for secondary organic aerosol (SOA) formation. Understanding the reactivity of such methoxyphenols at the air-water interface is a matter of major atmospheric interest. Online electrospray ionization mass spectrometry (OESI-MS) is used here to study the oxidation of two methoxyphenols among three phenolic aldehydes, 4-hydroxybenzaldehyde, vanillin, and syringaldehyde, on the surface of water. The OESI-MS results together with cyclic voltammetry measurements at variable pH are integrated into a mechanism describing the heterogeneous oxidative processing of methoxyphenols by gaseous ozone (O
    Language English
    Publishing date 2020-10-13
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5215
    ISSN (online) 1520-5215
    DOI 10.1021/acs.jpca.0c05944
    Database MEDical Literature Analysis and Retrieval System OnLINE

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