Subjects -> CHEMISTRY (Total: 928 journals)
    - ANALYTICAL CHEMISTRY (59 journals)
    - CHEMISTRY (661 journals)
    - CRYSTALLOGRAPHY (23 journals)
    - ELECTROCHEMISTRY (28 journals)
    - INORGANIC CHEMISTRY (45 journals)
    - ORGANIC CHEMISTRY (47 journals)
    - PHYSICAL CHEMISTRY (65 journals)

CHEMISTRY (661 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
Accounts of Materials Research     Hybrid Journal   (Followers: 1)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 30)
ACS Applied Polymer Materials     Hybrid Journal   (Followers: 9)
ACS Catalysis     Hybrid Journal   (Followers: 51)
ACS Chemical Neuroscience     Hybrid Journal   (Followers: 23)
ACS Combinatorial Science     Hybrid Journal   (Followers: 21)
ACS Environmental Au     Open Access   (Followers: 11)
ACS Macro Letters     Hybrid Journal   (Followers: 25)
ACS Materials Letters     Open Access   (Followers: 3)
ACS Medicinal Chemistry Letters     Hybrid Journal   (Followers: 41)
ACS Nano     Hybrid Journal   (Followers: 187)
ACS Photonics     Hybrid Journal   (Followers: 14)
ACS Symposium Series     Full-text available via subscription   (Followers: 3)
ACS Synthetic Biology     Hybrid Journal   (Followers: 31)
Acta Chemica Malaysia     Open Access  
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chimica Slovenica     Open Access   (Followers: 2)
Acta Chromatographica     Full-text available via subscription   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 8)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 7)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 10)
Adsorption Science & Technology     Open Access   (Followers: 7)
Advanced Electronic Materials     Hybrid Journal   (Followers: 7)
Advanced Functional Materials     Hybrid Journal   (Followers: 72)
Advanced Journal of Chemistry, Section A     Open Access   (Followers: 3)
Advanced Journal of Chemistry, Section B     Open Access   (Followers: 1)
Advanced Science Focus     Free   (Followers: 6)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 2)
Advanced Therapeutics     Hybrid Journal   (Followers: 1)
Advances in Chemical Engineering and Science     Open Access   (Followers: 111)
Advances in Chemical Science     Open Access   (Followers: 51)
Advances in Chemistry     Open Access   (Followers: 34)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 15)
Advances in Environmental Chemistry     Open Access   (Followers: 11)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 33)
Advances in Nanoparticles     Open Access   (Followers: 17)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Polymer Science     Hybrid Journal   (Followers: 51)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 18)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Sample Preparation     Open Access   (Followers: 9)
Advances in Science and Technology     Full-text available via subscription   (Followers: 16)
Aerosol Science and Engineering     Hybrid Journal  
African Journal of Chemical Education     Open Access   (Followers: 5)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 6)
Aggregate     Open Access   (Followers: 1)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alchemy : Journal of Chemistry     Open Access   (Followers: 4)
Alchemy : Jurnal Penelitian Kimia     Open Access  
Alotrop     Open Access  
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 44)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 20)
American Journal of Chemistry     Open Access   (Followers: 37)
American Journal of Plant Physiology     Open Access   (Followers: 9)
Analyst     Hybrid Journal   (Followers: 35)
Analytical Science Advances     Open Access   (Followers: 1)
Angewandte Chemie     Hybrid Journal   (Followers: 144)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 236)
Annales Universitatis Mariae Curie-Sklodowska, sectio AA – Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 6)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 4)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 5)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Antiviral Chemistry and Chemotherapy     Open Access   (Followers: 1)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Surface Science     Hybrid Journal   (Followers: 31)
Arabian Journal of Chemistry     Open Access   (Followers: 4)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Applied Chemistry Research     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 2)
Asian Journal of Chemical Sciences     Open Access  
Asian Journal of Chemistry and Pharmaceutical Sciences     Open Access  
Asian Journal of Physical and Chemical Sciences     Open Access   (Followers: 2)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 7)
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Hybrid Journal   (Followers: 203)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 5)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 2)
Biomacromolecules     Hybrid Journal   (Followers: 23)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 6)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 3)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 84)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 61)
Bioorganic Chemistry     Hybrid Journal   (Followers: 7)
Biopolymers     Hybrid Journal   (Followers: 15)
Biosensors     Open Access   (Followers: 3)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 3)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 5)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 1)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 11)
Canadian Mineralogist     Full-text available via subscription   (Followers: 5)
Carbohydrate Polymer Technologies and Applications     Open Access  
Carbohydrate Polymers     Hybrid Journal   (Followers: 9)
Carbohydrate Research     Hybrid Journal   (Followers: 23)
Carbon     Hybrid Journal   (Followers: 65)
Carbon Capture Science & Technology     Open Access  
Carbon Trends     Open Access   (Followers: 5)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 9)
Catalysis Science and Technology     Hybrid Journal   (Followers: 9)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysts     Open Access   (Followers: 11)
Cell Reports Physical Science     Open Access  
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
Chem     Hybrid Journal   (Followers: 1)
Chem Catalysis     Hybrid Journal  
ChemBioEng Reviews     Full-text available via subscription   (Followers: 3)
ChemCatChem     Hybrid Journal   (Followers: 7)
Chemical and Engineering News     Free   (Followers: 22)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Hybrid Journal   (Followers: 79)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Physics Impact     Full-text available via subscription  
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 4)
Chemical Research in Toxicology     Hybrid Journal   (Followers: 22)
Chemical Reviews     Hybrid Journal   (Followers: 178)
Chemical Science     Open Access   (Followers: 41)
Chemical Science International Journal     Open Access  
Chemical Technology     Open Access   (Followers: 75)
Chemical Thermodynamics and Thermal Analysis     Open Access   (Followers: 2)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 4)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 40)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 17)
ChemInform     Hybrid Journal   (Followers: 5)
Chemistry     Open Access  
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Industry     Full-text available via subscription   (Followers: 6)
Chemistry - A European Journal     Hybrid Journal   (Followers: 119)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 19)
Chemistry Africa : A Journal of the Tunisian Chemical Society     Hybrid Journal  
Chemistry and Materials Research     Open Access   (Followers: 18)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 6)
Chemistry Education Review     Open Access   (Followers: 1)
Chemistry in Education     Open Access   (Followers: 3)
Chemistry Letters     Full-text available via subscription   (Followers: 42)
Chemistry of Heterocyclic Compounds     Hybrid Journal   (Followers: 4)
Chemistry of Materials     Hybrid Journal   (Followers: 166)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 10)
Chemistry World     Hybrid Journal   (Followers: 20)
Chemistry-Didactics-Ecology-Metrology     Open Access  
ChemistryOpen     Open Access   (Followers: 1)
ChemistrySelect     Hybrid Journal  
Chemistry–Methods     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
ChemNanoMat     Hybrid Journal   (Followers: 1)
Chemoecology     Hybrid Journal   (Followers: 2)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 13)
Chemosensors     Open Access   (Followers: 1)
ChemPhotoChem     Hybrid Journal  
ChemPhysChem     Hybrid Journal   (Followers: 12)
ChemPhysMater     Full-text available via subscription  
ChemPlusChem     Hybrid Journal   (Followers: 2)
Chempublish Journal     Open Access  
ChemSystemsChem     Hybrid Journal   (Followers: 1)
ChemTexts     Hybrid Journal   (Followers: 1)
CHIMIA International Journal for Chemistry     Open Access   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 9)
Chromatographia     Hybrid Journal   (Followers: 21)
Chromatography     Open Access   (Followers: 2)
Chromatography Research International     Open Access   (Followers: 4)
Ciencia     Open Access  
Clay Minerals     Hybrid Journal   (Followers: 8)
Cogent Chemistry     Open Access   (Followers: 3)
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 6)
Colloids and Interfaces     Open Access  
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 8)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 2)
Combustion Science and Technology     Hybrid Journal   (Followers: 26)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 1)
Communications Chemistry     Open Access   (Followers: 2)
Communications Materials     Open Access  
Composite Interfaces     Hybrid Journal   (Followers: 6)
Comptes Rendus : Chimie     Open Access  
Comptes Rendus : Physique     Open Access   (Followers: 3)

        1 2 3 4 | Last

Similar Journals
Journal Cover
Aerosol Science and Engineering
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2510-375X - ISSN (Online) 2510-3768
Published by Springer-Verlag Homepage  [2469 journals]
  • Experimental Study of Ambient Air Quality Assessment During Oil Well
           Drilling

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      Abstract: Abstract Air pollution both indoor and outdoor is a global concern. This study aims at determining the effect of the oil field drilling process on ambient air quality. The World Health Organization (WHO) main eight elements have been monitored from the beginning to end of the process. The elements include ozone (O3), Sulfur dioxide (SO2), Hydrogen Sulfide (H2S), Nitrogen Dioxide (NO2), Total Nitrogen Oxides (NOX), Carbon Monoxide (CO), Particular MattersPM10 and PM2.5. The sampling diffusion tubes and devices were deployed from the four corners of the drilling site perimeter. The diffusion tubes of O3, SO2, H2S, NO2, and NOX, were analyzed at Gradko International laboratory. Moreover, the CO and PM10, and PM2.5 were measured using an AeroQual 500 series handheld meter. The result was compared to WHO2000/2006 air quality guidelines and computed to the United States Air Quality Index (US AQI). The samples of CO, NO2, NOx, or H2S do not have any exceedance over the WHO limits. But O3, SO2, PM10 and PM2.5 have exceeded the WHO limits in different locations and periods. O3 reached its highest concentration in March at Southwest corner 109.45 µg/m3 and at Northeast corner 104.88 µg/m3. PM10 and PM2.5 in the Northeast corner reached their highest in March 263 µg/m3 and 36 µg/m3, respectively. In addition, SO2 reached its highest of 61 µg/m3 in the Northwest corner. Computing the exceedance values into US AQI reveals that PM10 and O3 pollutants have negative effects on human health in the study area.
      PubDate: 2022-06-23
       
  • The Research of Aerosol and Microscope Fungi Accumulation Dynamics Inside
           the Air of a Hermetic Inhabited Facility During the 4-Month Isolation
           Experiment SIRIUS-19

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      Abstract: Abstract According to the terms of the 4-month SIRIUS-19 experiment, reproducing the main time characteristics of a real space flight to the Moon, six crew members were isolated in a terrestrial technical complex. During the experiment continuous (with an interval of 15 min) monitoring of the number concentration of aerosol particles in the air environment of a hermetic inhabited facility was worked out by means of the airborne particles counter Handheld 3016. Also periodically (six times during experiment) the number of viable propagules and the species composition of microscopic fungi specific pattern were evaluated by seeding. The aerosol monitoring data adequately reflected the activity of the crew members. The analysis of particle concentrations in various size ranges revealed three types of events that potentially appear to be an unfavorable situation from the point of view of the safety and health of the crew. The results obtained during simultaneous measurements of aerosol particles and micromycete spores concentration were compared. The regularities of changes in the neutral particles and spores concentrations as well as their relation to the crew activities have been revealed. The possibility of using an aerosol particle counter inside the spacecraft as an indicator of the microbiological situation, taking into account the background concentration of aerosols, has been analyzed. The general trend of fungal spores accumulation in the air environment of the surveyed premises has been revealed from 2–5 CFU/m3 at the beginning up to 287 ± 36 CFU/m3 closer to the end of the isolation experiment, still it did not exceed the sanitary norm recommended by the WHO.
      PubDate: 2022-06-21
       
  • YouTube as a Source of Information About Air Pollution

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      Abstract: Abstract YouTube is an important source of information on air pollution. The information presented on youtube may be of high or low quality. In our study, we aimed to evaluate the YouTube videos for their qualities and compare their view numbers, likes, and comment numbers according to high- and low-quality groups. In our study, 32.2% of all videos were in the high-quality group, 15.1% in the intermediate quality group, and 52.7% in the low-quality group according to Global Quality Scale (GQS). Significant differences were found among the quality groups in video length (p < 0.001), dislikes/day (p = 0.043), comment/day (p = 0.005), DISCERN (DS) tool scores (p < 0.001). The duration and DS tool scores were higher in high-quality videos; dislikes/day and comment/day averages were higher in low-quality videos. On the other hand, there was no significant difference in views, views/day, likes/day, likes ratios among quality groups. On this important matter, low-quality videos are abundant. Considering that there are lots of nonreliable information on YouTube, it is needed that individuals should be referred to reliable videos on air pollution.
      PubDate: 2022-06-01
       
  • Variation in Air Quality over Delhi Region: A Comparative Study for 2019
           and 2020

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      Abstract: Abstract Air quality of highly industrialized cities has shown enhanced potential for adverse impacts upon environment and human health. Spread of the COVID-19 in people suffering from some ailment is one of the examples. Meanwhile, complete and partial lockdown were imposed, nationwide, throughout the globe. This study portrays the spatio-temporal variations of atmospheric pollutants over eight regions in National Capital Territory (NCT) Delhi, India, during 2019–2020. It focusses on the entire year with special emphasis on four phases of lockdown and unlock with varying restrictions. As compared to 2019, the results show decrease in relative percent by for fine particulate matters (~ 11.6%), oxides of nitrogen (~ 7%), oxides of sulfur (~ 3.7%), ozone (~ 7.7%), carbon monoxide (~ 20.7%), benzene (~ 11%) and toluene (~ 14%). It was found that strict lockdown phase-I had major contribution to this change. Toluene:Benzene ratios for summer coinciding with strict lockdown confirmed non-operating stationary sources. Later phases were provided with relaxation in certain sectors (mainly vehicular mobility and industrial sector) accompanied with various meteorological impacts, hence did not show much variations. After unlock-IV, anthropogenic activities were found to be accelerated to meet the halted economic demands. Meanwhile, during winter season, biogenic emissions and meteorological factors together affect the air quality in India, aiding air dispersion inhibition due to which the pollutants level showed immediate rise. Restricted human activities prevailing during the lockdown and unlock phases proved to be beneficial in terms of stumping the emission of pollutants into the ambient environment proving that the imposed lockdown healed the environment temporarily.
      PubDate: 2022-05-20
       
  • Wet Vibrational Precipitator: Increasing Particulate Capture Efficiency
           Through Vibrational Analysis

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      Abstract: Abstract In this study, an array of wet vibrating cables is placed under tension across a particle laden air flow to capture particulates in the air stream. The goal is to remove particles suspended in a gas flow for pollution control; a function that is currently achieved typically through use of electrostatic precipitators (ESPs). Unlike the standard electrostatic precipitators, the particles are not required to be charged for capture; instead, particles are captured through impaction, interception, and diffusion. This technology is incorporated in a novel cross flow vibrational precipitator (VP) in which the particle collection surface consists of an array cable-type collection surfaces wetted by water flow. The VP system is unique in having particle collection enhanced by flow-induced vibrations of the cables. The flow-induced vibrations can be synchronized with the natural frequency of the cables to produce resonance which enhances vibration and improves particle capture by disrupting the fluid boundary layer on the cable surfaces. Since the vibrations are self-induced in the system, no separate electrical power sources such as high voltage transformer-rectifier (TR) units are needed. The work presented here focuses on a detailed vibration analysis of the VP system with the aim of increasing particulate capture efficiency by operating near resonance conditions where the vibration amplitudes become effective in increasing particle capture. The analytical approach adopted in the present study was implemented in the experiments and showed a 57% increase in particulate collection efficiency in the resonance regime when compared to the non-resonance mode.
      PubDate: 2022-05-11
       
  • A Review of Data Assimilation on Aerosol Optical, Radiative, and Climatic
           Effects Study

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      Abstract: Abstract Aerosol plays an important role in many significant environmental and climate-related issues. Accurate simulation and prediction are critical to understanding aerosol behaviors, aerosol processes, and aerosol effects. However, large uncertainties in the simplified parameterizations of aerosol processes, the optical calculations, and radiation calculations hinder the accurate simulations of aerosol distributions and their influences. The observation limitations in spatio-temporal scales also make it difficult to reproduce the three-dimensional aerosol features. The aerosol data assimilation method can combine both the modeling information with multi-platform aerosol observations to improve the accurate predictions and behaviors of aerosols, hence optimizing the evaluations of aerosol radiative and climatic effects. In this paper, we briefly introduce the developments of the principal methods for aerosol data assimilation and their implementations in investigating the aerosol optical properties, radiative effects, and climatic effects in China. The challenges and development trends in improvements of aerosol data assimilation are also highlighted.
      PubDate: 2022-05-04
       
  • Assessment of Potential Source and the Source Region of Particulate Matter
           in an Urban Area of Delhi, India

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      Abstract: Abstract This study addresses how the potential emission sources, regions (e.g., local, regional, and trans-boundary) and the trajectory stimulate the level of particulate matter (PM10) at observation site. Therefore, to comprehend such significant issues the chemical species, morphology and elements (EC, OC, WSOC, Al, S, Ti, Mn, Fe, Cu, Zn, As, Br, Pb, Cr, F, Cl, Na, K, Mg, Ca, and P) of PM10 were investigated over Delhi. Trajectory analysis and potential source contribution function identify dominating regions like Haryana, Punjab, Indo-Gangetic Plains, Afghanistan, Pakistan, Bay of Bengal, and Arabian Sea contributing to the mass concentration of PM10 at the sampling site. Furthermore, conditional bivariate probability function (CBPF) was programmed to the five components of principal component analysis [crustal/road dust, industrial emissions, biomass burning + fossil-fuel combustion (BB + FCC), mixed emissions, and vehicular emissions]. Where, industrial emissions shows the maximum probability in the (N–W and S–W) directions; vehicular emissions probability was higher in the (S–E and S–W) direction, (N–E and N–W) shows the maximum probability of (BB + FCC). These CBPF programmed directions were quite obvious for the sources in such directions. Subsequently, the field-emission scanning electron microscope study showed different particulate morphology as spherical, irregular, and flocculent, thus defining the possible potential sources.
      PubDate: 2022-04-24
       
  • Seasonal Tropospheric Aerosol Classification Using AERONET Spectral
           Absorption Properties in African Locations

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      Abstract: Abstract Due to diverse aerosol sources and location, complex aerosol composition in Africa makes the regional assessment of its impact on climate limited. The single scattering albedo (SSA), absorption Ångström exponent (AAE) and extinction Ångström exponent in selected bands from Aerosol Robotic Network (AERONET) level 2.0 dataset are used over ten stations in Africa to classify aerosol type based on seasons from 2000 to 2015. The multi-year AERONET data were investigated to group the sites based on the threshold limit of the aerosol properties and infer dominant aerosol type using Voronoi clustering. The aerosol incursion into the sites is investigated using the NOAA HYSPLIT model at the peak of the seasons. The results show that aerosol type depends on the source region and transportation routes, such as the case of Island stations in the Atlantic close to Sahara, with dominant aerosol type of coarse and fine non-absorbing in the two established seasons. Furthermore, a high percentage of coarse and fine absorbing particles is observed in the northeast, such as Cairo, while a low percentage of coarse with a high percentage of fine absorbing particles is found in the east. In the southern stations, fine and strong absorbing aerosols are observed. The absorption Angstrom Exponent result reveals high values (> 1.5) for the majority of the sites in the north, signifying dust dominance and low values (≤ 1.45) for the southern sites signifying fine-mode aerosol with some mixed aerosols at the middle stations. The overlap in each absorption value is resolved through a clustering technique using AAE versus EAE variables. The seasonal classification method adopted provides ways to reduce ambiguity in identifying aerosol type and resolve variable aerosol populations not well represented in the region.
      PubDate: 2022-04-22
       
  • Effects of PM2.5 and Meteorological Parameters on the Incidence Rates of
           Chronic Obstructive Pulmonary Disease (COPD) in the Upper Northern Region
           of Thailand

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      Abstract: Abstract The research aimed to study the effect of ambient PM2.5 and meteorological parameters on the incidence rates of COPD. The study, using the panel model, lasted for 7 years and covered eight provinces in the upper northern region of Thailand (January 2014–December 2020). The feasible general least squares (FGLS) for the heteroscedasticity were used to estimate all the parameters in the model. The study result showed that all PM2.5 and meteorological parameters contributed to an increase in COPD cases. Chronic obstructive pulmonary disease, or COPD, refers to a group of diseases that cause airflow blockage and breathing-related problems, including emphysema and chronic bronchitis (Mannino et al. 2002). We found that the average increase of PM2.5 by 1%, would add an increased risk of COPD cases by 0.25% at a significance level of 0.10. Our study results also revealed that the average increase of temperature, humidity and hot spots by 1% would lead to the increased risk of new COPD cases by 0.42% at a significance level of 0.05. Moreover, a rise in the average of the lowest temperature in the provinces under the study by 1%, would increase the number of new cases of COPD by 0.92% at a significance level at 0.01. There were some challenges involved in investigating health impacts of PM2.5. This study demonstrated that evidence from the econometric panel data model provided valuable information for future efforts to prevent incidence of PM2.5 disease. It is recommended that a more comprehensive program is needed to reduce the exacerbation rate of COPD.
      PubDate: 2022-04-18
       
  • Synthesis and Characterization of ZnS/PbS Quantum Dots Nanorods Array
           Heterostructure

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      Abstract: Abstract Glass was used as substrates for the synthesis of ZnS/PbS heterostructure using simply one-step thermal evaporation method. The surface morphology and structural studies were carefully researched using various characterization methods such as scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) techniques, X-ray Photoelectron Spectroscopy (XPS), and micro-photoluminescence (PL). Our results indicate that the obtained nanostructures are composed mainly of nanorods with length of few microns and thickness of up 100 nm. The ZnS/PbS nanocrystalline consists of cubic phase and polycrystalline in nature. The photoluminescence performance of the system was investigated. At least one luminescence center gives a red emission under 488 nm excitation is identified. Another luminescence center at 1350 nm could be assigned to the PbS quantum dots, which can be utilized to produce infrared solar cells. Produce efficient infrared solar cells.
      PubDate: 2022-04-15
      DOI: 10.1007/s41810-022-00137-6
       
  • Model Studies of Cloud Effects for Surface UV Radiation

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      Abstract: Abstract Based on the analysis of the results of research by various authors in the field, it has been determined that the presence of clouds can lead to both an increase and a decrease in UV radiation on the surface of the Earth. The condition of UV radiation balance, as well as the condition of total increase on the surface of Earth, has been determined. On the basis of the proposed non-permanent model of cough clouds, a condition of balance of UV radiation on the Earth's surface and a condition of total increase of UV radiation have been found.
      PubDate: 2022-04-01
      DOI: 10.1007/s41810-022-00136-7
       
  • Impact Assessment of Aerosol Optical Depth on Rainfall in Indian Rural
           Areas

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      Abstract: Abstract Aerosol significantly influences the life cycle of clouds and their formation. Many studies reported worldwide on anthropogenic aerosols and their impact on clouds and their optical properties. Atmospheric remote sensing provides the best way to estimate indirectly air quality surveillance and management in megacities of developing countries like India where many cities have elevated concentration profiles of air pollutants with inadequate coverage of spatial and temporal monitoring. The results of the study highlighted the impact on rainfall patterns due to aerosol optical depth (AOD) and fine particulate matter (PM2.5) for a total of 7 years (2015–2021) over five different Indian rural sites by using MODerate Resolution Imaging Spectroradiometer (MODIS). The AOD (550 nm) and PM2.5 were retrieved from the MODIS sensor Terra satellites and the MEERA 2 model, respectively. Also, we have analyzed in this study the relationship of AOD (550 nm) with PM2.5 and meteorological variables (temperature relative humidity and precipitation) over Indian rural sites during 2015–2021. The maximum concentration of AOD (550 nm) has been measured for Gandhi college (2.94 ± 0.44) and minimum for ARM college (0.01 ± 0.28), while the maximum concentration of PM2.5 has been measured for ARM College 296.37 (µg m−3) and minimum for Karunya University 0.02 (µg m−3). Also, the relation between AOD (550 nm) with total precipitation is measured positively for all locations except Gandhi college whereby PM2.5 associated with total precipitation is measured negatively for all locations except ARM college. Finally, the relationship between PM2.5 and AOD (550 nm) is measured positively in all selected locations except Singhad Institute. The maximum rainfall has been observed for monsoon months (June–August) and post-monsoon months (October) for all locations during the study period. The maximum total precipitation has been measured for Singhad 11,674.7 (mm) and the minimum for Karunya University 4563.41 (mm). However, the results of the study indicated that there was no direct trend observed in AOD in five different selected rural Indian sites.
      PubDate: 2022-03-29
      DOI: 10.1007/s41810-022-00134-9
       
  • Annual and Inter-annual Variability Coupled with Comparison of
           MODIS-AERONET Retrieved Aerosol Optical Depth over a Rural Site in the
           Central Indo-Gangetic Basin

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      Abstract: Abstract The long-term (2000–2015) MODIS EOS-Terra/Aqua multi-algorithm (DT, DB and combined DTB) retrieved AOD550 nm and AERONET measured AOD550 nm data at Gandhi College (24.87° N, 84.19° E; 60 m amsl), a rural site in the central IGB, have been employed to assess the performance of MODIS AOD products against AERONET AOD and to examine their annual and inter-annual variability. For both MODIS Terra/Aqua sensors, the linear regression data statistics reveals that the values of slopes for MODIS Terra-EOS sensor lie in the range 1.04 ± 0.03 [DB (QA = 2,3)] to 1.11 ± 0.02 [DT (QA = (2,3)] which are slightly higher than 1. Also, similar observation is noticed for MODIS Aqua-EOS sensor for which slopes of linear regression fit span over 0.99 ± 0.03 [DB (QA = 2,3)] – 1.16 ± 0.03 [DT (QA = 3)]. The intercept, however, approach zero values for both MODIS Terra/AQUA–EOS sensor at DT (QA = 3), DT (QA = 2,3), DB (QA = 2,3) and DTB combined retrieval algorithms. The evaluation/performance analysis, therefore, exhibits the observed near-perfect match of MODIS Terra/Aqua-EOS sensors derived AOD550nm from all algorithms with AERONET measured AOD550 nm as a result of magnitudes of the slope and intercept of the linear regression fit to the scatter diagrams of MODIS AOD550 nm against AERONET AOD550 nm. Results, thus indicate that at Gandhi College, the DT, and DTB combined retrieval algorithms satisfactorily estimate AOD products which can then be used to build aerosol climatology over Gandhi College. The MODIS and AERONET derived AOD550 nm values over the Gandhi College indicate a distinct annual pattern with maximum AOD550 nm during the winter season and minimum AOD550 nm during monsoon season and winter-summer transition period. Analysis revealed that the aerosol loading starts building up over the study region from March to June of the pre-monsoon season mainly due to the high convective activity and long-range mineral dust transport from western arid regions. An increase in AOD values during the post-monsoon and winter season is primarily due to the influx of aerosols from biomass burning processes and stable atmospheric conditions, the MODIS Terra retrieved AOD550 nm using DT and combined DTB algorithm showed higher values in the month of July of monsoon season as compared to MODIS Aqua retrieved AOD550 nm. The inter-annual AOD trend analysis reveals that for MODIS Terra satellite there exits an increasing AOD trend during post-monsoon and winter seasons for DT (0.0233 year–1), DB (0.0239 year–1) and DTB (0.0246 year–1), retrieval algorithms. For MODIS Aqua satellite also, there exists an increasing AOD550 nm trend with differing but higher AOD year–1 trend value. On the contrary, for monsoon and pre-monsoon seasons, for MODIS Terra and Aqua satellite, the AOD trends are found to be statistically insignificant.
      PubDate: 2022-03-26
      DOI: 10.1007/s41810-022-00135-8
       
  • Atmospheric Aerosols: Some Highlights and Highlighters, Past to Recent
           Years

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      Abstract: Abstract The severe harmful impact of atmospheric aerosols over the environment leads to create the diverse human interests and concerns. Various progressive steps were taken by researchers and scientists to understand the fundamentals, such as nucleation and growth mechanisms, formalization of particle dynamics, characterization of the mechanisms for the particle-size dispensation, detection of chemical processes for atmospheric particle sources. The increase in population growth and different manmade activities have led to change in the environmental conditions causes to pollute the distinct vicinities. Different changes in the environment such as land use pattern, increased concentration of various greenhouse gases, and Industrial pollutants change the energy balance in our climatic conditions and affect the radiation budget of earth’ atmosphere. Such changes in climate and polluted environment leads to many health-related ailments to mankind. The present study outlines the recent research perspectives of atmospheric aerosols, their estimation through different modes, effects, and an overview of the current situations that need to be addressed before they become completely incorporated.
      PubDate: 2022-03-24
      DOI: 10.1007/s41810-022-00133-w
       
  • UV Erythemal Radiation and Its Sensitivity to Changes in Total Column
           Ozone and Aerosols

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      Abstract: Abstract Ultraviolet erythemal radiation (UVER) measurements made at the Nowrosjee Wadia College (NWC) campus, Pune (India) were analysed to investigate temporal variability of UVER, to quantify effects of total column ozone (TCO) and aerosols on surface reaching UVER and to inter-compare ground-based and satellite retrieved UVER data. Diurnal variability in UVER exhibits a significant change with respect to local noon time followed by a month-to-month cyclical trend. The rate of ascent/descent of UVER during morning/evening time in winter is seen to be 0.43 minimum erythemal dose per hour (MED/hr) while during pre-monsoon season it is 0.63 MED/hr. Overall, the average value of the UVER for study period comes out to be 2.93 ± 0.8 MED/hr which is ~ 1.5 times higher than the threshold limit at which the Indian skin gets affected. There exists a quasi-anti-phase relationship between UVER and aerosol/TCO data pairs highlighting their influence on surface reaching UVER. Analysis reveals an inverse relationship between UV index (UV-I) (hence UVER) and aerosol index (AI) yielding Pearson correlation coefficient (r) in the range − 0.21 to − 0.88 for the period 2012–2013 and 2014–2015. The study further elucidates that the observed overall rate of decrement in UVER as a function of TCO is found to be 2.8 ± 1.5%. The Ozone Monitoring Instrument (OMI) retrieved UVER overestimates the UV-Biometer measured UVER by about 30%. The reason for overestimations being the non-inclusion of absorbing aerosols in the UVER retrieval algorithm employed in OMI estimations as well as prevalent atmospheric conditions.
      PubDate: 2022-03-22
      DOI: 10.1007/s41810-022-00132-x
       
  • Development and Application of Photoionization Technology for Organic
           Analysis of Particulate Matter

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      Abstract: Abstract Photoionization (PI) is a soft ionization method that does not cause the production of molecular fragments from target materials. Applications of soft photoionization–mass spectrometric methods to molecular analysis are reviewed here. A non-selective photoionization technique (single-photon ionization, SPI) can be used to measure volatile compounds with molecular mass < 120 m/z, while a soft and selective technique (resonance enhanced multi-photon ionization, REMPI) is better suited for aromatic compounds whose molecular mass is > 100 m/z. The development of hyphenated thermal–optical analyzer photo-ionization time-of-flight mass spectrometers (PI-TOFMS) combined with REMPI and SPI methods has enabled the analyses of evolved gaseous species, and these advanced methods have led to new insights into the elemental and organic carbon in particulate matter. Nonetheless, technical developments in the REMPI/SPI–TOFMS framework are far from complete, and there are opportunities for the development of new process analysis applications.
      PubDate: 2022-03-18
      DOI: 10.1007/s41810-022-00130-z
       
  • Understanding the Sources of Heavy Metal Pollution in Ambient Air of
           Neighboring a Solid Waste Landfill Site

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      Abstract: With growing urbanization and industrialization, problems such as poor disposal practices of solid waste and ensuing uncontrolled air pollution adjacent to landfill pose threats to human and environmental wellbeing. Ahmedabad is highly polluted urban city in India and unregulated burning of solid waste further aggravates already appalling situation caused by a large number of industries and vehicle fleets. The present work was carried out to understand sources of metals in ambient air surrounding a municipal landfill known as Pirana. For the study, surrounding area of the landfill was divided into 100 rectangular cells covering almost 5 km distance from its outer boundary. A location representing major land-use feature of each cell was classified. Sampling was carried out at these locations. A total of 100 PM5.0 samples were collected. Sampling was conducted for 3 h at each sampling location with samples collected on quartz filter paper. Measurements were performed over approximately 6 months from August to February, 2018. The filters were analyzed for metals using an Atomic Absorption Spectrometer. These measurements were used to identify pollution sources using positive matrix factorization technique and locate the hotspots of emission sources of heavy metals pollution. Five major sources namely, ferrous industry, nonferrous industry, vehicular emissions, re-suspended dust and solid waste burning/industrial coal combustion were identified and quantified. The average contributions of these sources to heavy metals were 20.7 ± 16.2, 18.4 ± 14.3, 19.9 ± 13.6, 21.4 ± 17.6, and 19.6 ± 10.6%, respectively. The average contribution from solid waste and industrial coal combustion is only 19.6% against the total from the combined remaining sources (~ 80.4), which means contribution from former will be lesser. Thus, solid waste burning is minor contributor for degradation of air quality; presence of many other sources around the site is actually the dominant cause of pollution. Graphical abstract
      PubDate: 2022-03-15
      DOI: 10.1007/s41810-022-00131-y
       
  • Deposition Modeling of Airborne Particulate Matter on Human Respiratory
           Tract During Winter Seasons in Arid-Urban Environment

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      Abstract: Abstract This study aimed to predict winter season street-level ambient particulate matter (PM) depositions within human airways using Multiple-Path Particle Dosimetry (MPPD) model. The PM exposure concentrations in the downtown street of As-Seeb, Oman were measured continuously over 20 days (31 October–9 December 2018) using a mobile ambient air quality monitoring instrument equipped with sensors. The MPPD model together with the associated default respiratory parameters was implemented to quantify the total, head, tracheobronchial (TB), and pulmonary (PL) regional PM depositions in airways among children (3, 8, and 14 years old) and adults (18 and 21 years old) groups. The street-level PM exposure concentration (µg/m3) levels for PM10 (avg 69.64; IQR 15.1), PM2.5 (avg 13.76; IQR 1.36) and PM1 (avg 3.67; IQR 0.52) was obtained during the winter season. The average 24-H PM2.5 (14 µg/m3) concentration was about 60, 50 and 44% lower when compared to US National Ambient Air Quality Standards (NAAQS), Canadian Ambient Air Quality Standard (CAAQS), and WHO daily ceilings of 35, 28 and 25 µg/m3, respectively. Across all the age groups, the total airways deposition was found to be very high in PM10 (92–99%), followed by PM2.5 (61–76%) and PM1 (33–49%) being the least. Similarly, the average deposition of PM10 in the head region (76%) was observed to be more than 4–15 times higher than TB (16%) and PL (4%) for all ages. Children recorded higher PM2.5 depositions in the TB (53–59%) region compared to adults (TB 47–51%). The PM10 lobar deposition of 8-year-old children is more than 7 times higher compared to 21-year-old adults due to their lower breathing heights and higher breathing rates. In general, PM clearance was very high in TB and poor in the alveolar region.
      PubDate: 2022-01-27
      DOI: 10.1007/s41810-021-00125-2
       
  • Aerosol–Cloud Interaction over South-Central India and Adjoining
           Coastal Areas

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      Abstract: Abstract The MODerate Resolution Imaging Spectroradiometer (MODIS) retrieved (2009–2015) aerosol and cloud products over South-Central India, including adjoining coastal areas, were quantitatively analyzed to explore aerosol–cloud interaction and to estimate aerosol indirect effect (AIE). The spatial distribution of aerosol optical depth (AOD) showed high AOD550 nm (~ 0.7) over the northern India and is attributed to the long- and short-range transport of desert dust aerosols, dense population, and industrialization. The mean seasonal AOD550 nm over region decreases from (0.55 ± 0.11) to (0.45 ± 0.05) and to (0.39 ± 0.04) for monsoon, post-monsoon, and winter seasons, respectively. The western Indian regions, particularly Pune and Jaipur, showed higher mean AOD500 nm as compared to other cities. The positive correlation of aerosol indirect effect (AIE) with AOD for Pune and Pondicherry through pre- as well post- monsoon seasons for all cities except Pondicherry is ascribed to hygroscopic aerosol particulate growth. The aerosol size spectra undergo significant transformation from dominant high accumulation-mode during September–February months [with Angström exponent (AE) > 1.0] to dominant augmented coarse-mode (AE < 1.0) through March to June–July period. The AOD500 nm-to-cloud fraction (CF) correlation coefficients range between 0.05 and 0.46 for coastal region, while for Jaipur, Pune, and overall study region, the CFs are 0.53, 0.65, and 0.75, respectively. The pre-monsoon months recorded lower (0.4–0.6 µm) cloud effective radii values than monsoon season (0.8–1.3 µm). The AOD-to-cloud liquid water path correlations for Goa and Pune (0.30–0.48) are higher than other cities (0.01–0.19). The AIE average values for metropolitan, semi-arid, coastal, high-altitude sites, and overall study region were found to be − 0.168, − 0.025, − 0.104, − 0.101, and − 0.128, respectively. There occurs a noticeable negative AIE for three categories (viz., Metropolitan, coastal, and high-altitude station), while for semi-arid category, there exists a prominent Twomey (positive AIE) effect.
      PubDate: 2022-01-23
      DOI: 10.1007/s41810-021-00123-4
       
  • A Theoretical Model of RGB Attenuation of Solar Radiation Components Under
           Strong Aerosol Pollution of the Atmosphere

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      Abstract: Abstract The urgency and significance of the formulation of the problem of creating a generalized model of attenuation of solar radiation in the visible range in the polluted atmosphere of large industrial cities has been substantiated. To build our own new model of attenuation of RGB components of solar radiation, we used the well-known theoretical position that with an increase in the average attenuation coefficient in the range from purely Rayleigh scattering to light scattering in strong fog, the ratio of partial attenuation coefficients of red/green and blue/green colors tends to unity. A mathematical model of attenuation of RGB components of solar radiation in a polluted atmosphere is proposed. It is shown that the proposed mathematical model allows changing all light components in attenuated solar radiation by selecting just one indicator of this model.
      PubDate: 2021-10-11
      DOI: 10.1007/s41810-021-00120-7
       
 
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