Log in

Relevant bibliographies by topics / Analyte air concentrations / Journal articles

To see the other types of publications on this topic, follow the link: Analyte air concentrations.

Journal articles on the topic 'Analyte air concentrations'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Analyte air concentrations.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Shaposhnik, Alexey, Pavel Moskalev, Elena Sizask, Stanislav Ryabtsev, and Alexey Vasiliev. "Selective Detection of Hydrogen Sulfide and Methane by a Single MOX-Sensor." Sensors 19, no. 5 (2019): 1135. http://dx.doi.org/10.3390/s19051135.

Full text

Abstract:

In this paper, we describe a technique for the qualitative and quantitative analysis of such gas mixtures as “hydrogen sulfide in air” and “methane in air” using temperature modulation of a single metal oxide sensor. Using regression analysis in the principal components plane (PC1, PC2), we performed a selective determination of analytes on the minimum set of their concentrations in the training set, which is essential for solving practical problems. An important feature of this work is the difference in test gas concentrations from their concentrations in the training set. For the qualitative

APA, Harvard, Vancouver, ISO, and other styles

2

Shahpoury, P., G. Lammel, A. Holubová Šmejkalová, J. Klánová, P. Přibylová, and M. Váňa. "Polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and chlorinated pesticides in background air in central Europe – investigating parameters affecting wet scavenging of polycyclic aromatic hydrocarbons." Atmospheric Chemistry and Physics Discussions 14, no. 19 (2014): 26939–70. http://dx.doi.org/10.5194/acpd-14-26939-2014.

Full text

Abstract:

Abstract. Concentrations of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and chlorinated pesticides (CPs) were measured in air and precipitation at a background site in central Europe. Σ PAH concentrations in air and rainwater ranged from 0.7 to 327.9 ng m−3 and below analytical method detection limit (< MDL) to 2.1 × 103 ng L−1. The concentrations of PCBs and CPs in rainwater were < MDL. Σ PCB and Σ CP concentrations in air ranged from < MDL to 44.6 and < MDL to 351.7 pg m−3, respectively. The potential relationships between PAH wet scavenging and par

APA, Harvard, Vancouver, ISO, and other styles

3

Shahpoury, P., G. Lammel, A. Holubová Šmejkalová, J. Klánová, P. Přibylová, and M. Váňa. "Polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and chlorinated pesticides in background air in central Europe – investigating parameters affecting wet scavenging of polycyclic aromatic hydrocarbons." Atmospheric Chemistry and Physics 15, no. 4 (2015): 1795–805. http://dx.doi.org/10.5194/acp-15-1795-2015.

Full text

Abstract:

Abstract. Concentrations of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and chlorinated pesticides (CPs) were measured in air and precipitation at a background site in central Europe. ∑ PAH concentrations in air and rainwater ranged from 0.7 to 327.9 ng m−3 and below limit of quantification (< LOQ) to 2.1 × 103 ng L−1. The concentrations of PCBs and CPs in rainwater were < LOQ. ∑ PCB and ∑ CP concentrations in air ranged from < LOQ to 44.6 and < LOQ to 351.7 pg m−3, respectively. The potential relationships between PAH wet scavenging and particulate m

APA, Harvard, Vancouver, ISO, and other styles

4

Feriduni, Behruz, Mohammad Barzegar, Shahram Sadeghvand, Shadi Shiva, Maryam Khoubnasabjafari, and Abolghasem Jouyban. "Determination of valproic acid and 3-heptanone in plasma using air-assisted liquid-liquid microextraction with the assistance of vortex: Application in the real samples." BioImpacts 9, no. 2 (2019): 105–13. http://dx.doi.org/10.15171/bi.2019.14.

Full text

Abstract:

Introduction: Valproic acid (VPA) is an antiepileptic drug used to treat epilepsy and bipolar disorder. Adverse effects of VPA were studied in many reports, however, a dose-response relationship between VPA and its metabolites in epilepsy patients are extremely limited. In this paper, a high efficient method was developed for the preconcentration and determination of VPA and its main metabolite in plasma. Methods: For the extraction and preconcentration of the selected analytes, a volume of an extractant was placed at the bottom of the microtube containing pretreated plasma. The mixture was re

APA, Harvard, Vancouver, ISO, and other styles

5

Iyer, Abhijeet, Veselinka Mitevska, Jonathan Samuelson, Scott Campbell, and Venkat R. Bhethanabotla. "Polymer–Plasticizer Coatings for BTEX Detection Using Quartz Crystal Microbalance." Sensors 21, no. 16 (2021): 5667. http://dx.doi.org/10.3390/s21165667.

Full text

Abstract:

Sensing films based on polymer–plasticizer coatings have been developed to detect volatile organic compounds (VOCs) in the atmosphere at low concentrations (ppm) using quartz crystal microbalances (QCMs). Of particular interest in this work are the VOCs benzene, ethylbenzene, and toluene which, along with xylene, are collectively referred to as BTEX. The combinations of four glassy polymers with five plasticizers were studied as prospective sensor films for this application, with PEMA-DINCH (5%) and PEMA-DIOA (5%) demonstrating optimal performance. This work shows how the sensitivity and selec

APA, Harvard, Vancouver, ISO, and other styles

6

Brown, Richard J. C., Daniel Hood, and Andrew S. Brown. "On the Optimum Sampling Time for the Measurement of Pollutants in Ambient Air." Journal of Automated Methods and Management in Chemistry 2008 (2008): 1–6. http://dx.doi.org/10.1155/2008/814715.

Full text

Abstract:

No measurement result of any kind is complete without an associated statement of uncertainty. In general, the aim is to minimise this measurement uncertainty to the extent that the measurement made is fit for purpose, or the uncertainty meets an acceptable level such as a ‘‘data quality objective’’. This paper demonstrates how the sampling time used to measure a pollutant in ambient air over a given time period, particularly with automatic instruments, can affect the uncertainty of the measurement result. It is shown that the uncertainty of the overall result depends critically on how the prec

APA, Harvard, Vancouver, ISO, and other styles

7

Bouche, Marie-Paule L. A., Jan F. P. Van Bocxlaer, Georges Rolly, et al. "Quantitative Determination of Vapor-Phase Compound A in Sevoflurane Anesthesia Using Gas Chromatography–Mass Spectrometry." Clinical Chemistry 47, no. 2 (2001): 281–91. http://dx.doi.org/10.1093/clinchem/47.2.281.

Full text

Abstract:

Abstract Background: During low-flow or closed-circuit anesthesia with the fluorinated inhalation anesthetic sevoflurane, compound A, an olefinic degradation product with known nephrotoxicity in rats, is generated on contact with alkaline CO2 adsorbents. To evaluate compound A formation and thus potential sevoflurane toxicity, a reliable and reproducible assay for quantitative vapor-phase compound A determination was developed. Methods: Compound A concentrations were measured by fully automated capillary gas chromatography–mass spectrometry with cryofocusing. Calibrators of compound A in the v

APA, Harvard, Vancouver, ISO, and other styles

8

Huang, Shuquan, Jessica Connolly, Andrei Khlystov, and Richard B. Fair. "Digital Microfluidics for the Detection of Selected Inorganic Ions in Aerosols." Sensors 20, no. 5 (2020): 1281. http://dx.doi.org/10.3390/s20051281.

Full text

Abstract:

A prototype aerosol detection system is presented that is designed to accurately and quickly measure the concentration of selected inorganic ions in the atmosphere. The aerosol detection system combines digital microfluidics technology, aerosol impaction and chemical detection integrated on the same chip. Target compounds are the major inorganic aerosol constituents: sulfate, nitrate and ammonium. The digital microfluidic system consists of top and bottom plates that sandwich a fluid layer. Nozzles for an inertial impactor are built into the top plate according to known, scaling principles. Th

APA, Harvard, Vancouver, ISO, and other styles

9

Kirchgeorg, Torben, Ingo Weinberg, Annekatrin Dreyer, and Ralf Ebinghaus. "Perfluorinated compounds in marine surface waters: data from the Baltic Sea and methodological challenges for future studies." Environmental Chemistry 7, no. 5 (2010): 429. http://dx.doi.org/10.1071/en10039.

Full text

Abstract:

Environmental context.Perfluorinated compounds are man-made chemicals of emerging environmental concern because of their global distribution in water, air and biota. We investigate the distribution of these chemicals in surface water of the Baltic Sea, a unique ecosystem and the world’s largest body of brackish water. The observed contamination was of the same order of magnitude as classical persistent organic pollutants in the world’s oceans, and decreased with lower population density in the Baltic Sea catchments. Abstract.Poly- and perfluorinated compounds (PFCs) are chemicals of emerging e

APA, Harvard, Vancouver, ISO, and other styles

10

Hawker, Charles D., William L. Roberts, Antonio DaSilva, et al. "Development and Validation of an Automated Thawing and Mixing Workcell." Clinical Chemistry 53, no. 12 (2007): 2209–11. http://dx.doi.org/10.1373/clinchem.2007.094185.

Full text

Abstract:

Abstract Background: Working toward a goal of total laboratory automation, we are automating manual activities in our highest volume laboratory section. Because half of all specimens arriving in this laboratory section are frozen, we began by developing an automated workcell for thawing frozen specimens and mixing the thawed specimens to remove concentration gradients resulting from freezing and thawing. Methods: We developed an initial robotic workcell that removed specimens from the transport system’s conveyor, blew high-velocity room temperature air at the tubes, mixed them, and replaced th

APA, Harvard, Vancouver, ISO, and other styles

11

Alekseenko, Аnton N., and O. M. Zhurba. "APPLICATION OF MATHEMATICAL PLANNING OF THE EXPERIMENT IN THE CHOOSING THE OPTIMUM CONDITIONS OF THE VAPOR-PHASE GAS-CHROMATOGRAPHIC DETERMINATION OF FORMALDEHYDE IN THE URINE." Hygiene and sanitation 97, no. 10 (2018): 985–89. http://dx.doi.org/10.18821/0016-9900-2018-97-10-985-989.

Full text

Abstract:

Introduction. There was substantiated a method for the determination of formaldehyde by vapor-phase gas chromatography by the use of derivatizing reagent o-(2,3,4,5,6-pentafluorbenzyl)hydroxylamine. Material and methods. Formaldehyde in urine was derivatized to o-pentafluorobenzyloxime and recovered to the vapor phase by heating the urine sample with o-(2,3,4,5,6-pentafluorbenzyl)hydroxylamine in a sealed vial. Gas-chromatographic analysis of the vapor-air phase was performed in a mode of the temperature gradient on a capillary column HP-5 with a flame ionization detector. Identification of th

APA, Harvard, Vancouver, ISO, and other styles

12

Obersteiner, F., H. Bönisch, and A. Engel. "An automated gas chromatography time-of-flight mass spectrometry instrument for the quantitative analysis of halocarbons in air." Atmospheric Measurement Techniques Discussions 8, no. 9 (2015): 9455–502. http://dx.doi.org/10.5194/amtd-8-9455-2015.

Full text

Abstract:

Abstract. We present the characterization and application of a new gas chromatography-time-of-flight mass spectrometry instrument (GC-TOFMS) for the quantitative analysis of halocarbons in air samples. The setup comprises three fundamental enhancements compared to our earlier work (Hoker et al., 2015): (1) full automation, (2) a mass resolving power R = m/Δ m of the TOFMS (Tofwerk AG, Switzerland) increased up to 4000 Th/Th and (3) a fully accessible data format of the mass spectrometric data. Automation in combination with the accessible data allowed an in-depth characterization of the instru

APA, Harvard, Vancouver, ISO, and other styles

13

Santosh, SR, S. Sampath, and A. Gupta. "Simultaneous analysis of eight benzodiazepines in blood and urine matrix by gas chromatography–mass spectrometry: Implications for air crash investigation." Indian Journal of Aerospace Medicine 63 (November 7, 2019): 2–7. http://dx.doi.org/10.25259/ijasm_2019_2.

Full text

Abstract:

Introduction: Benzodiazepines are the most commonly prescribed class of drugs in India and are capable of impairing the performance of an aviator in therapeutic to subtherapeutic levels. Detection of benzodiazepines, particularly in blood, is not easy, since the concentrations present, especially following prescribed medical use, can be very low. Several publications have addressed estimation of benzodiazepines in plasma or serum; however, few have attempted their detection in whole blood. Urine, although a better specimen, benzodiazepines due to their extensive metabolism, its metabolites are

APA, Harvard, Vancouver, ISO, and other styles

14

Thorne, Peter S., Sarah S. Perry, Rena Saito, et al. "Evaluation of the Limulus Amebocyte Lysate and Recombinant Factor C Assays for Assessment of Airborne Endotoxin." Applied and Environmental Microbiology 76, no. 15 (2010): 4988–95. http://dx.doi.org/10.1128/aem.00527-10.

Full text

Abstract:

ABSTRACT As a potent inflammatory agent, endotoxin is a key analyte of interest for studies of lung ailments in domestic environments and occupational settings with organic dust. A relatively unexplored advance in endotoxin exposure assessment is the use of recombinant factor C (rFC) from the Limulus pathway in a fluorometric assay. In this study, we compared airborne endotoxin concentrations in laboratory- and field-collected parallel air samples using the kinetic Limulus amebocyte lysate (LAL) assay and the rFC assay. Air sampling was performed using paired Institute of Occupational Medicine

APA, Harvard, Vancouver, ISO, and other styles

15

MOLNÁR, DÁNIEL, PÉTER HESZLER, RÓBERT MINGESZ, et al. "INCREASING CHEMICAL SELECTIVITY OF CARBON NANOTUBE-BASED SENSORS BY FLUCTUATION-ENHANCED SENSING." Fluctuation and Noise Letters 09, no. 03 (2010): 277–87. http://dx.doi.org/10.1142/s0219477510000228.

Full text

Abstract:

Nowadays gas detection in the ppm and sub-ppm domain is essential in terms of environmental protection as well as reducing sanitary risks. However, detecting systems to perform these measurements (e.g., gas chromatographs) are expensive and take up too much space, thus their use is not likely to become wide-spread. Small, cheap and easily mountable sensors, such as resistive sensors are more applicable for this purpose. But the main disadvantage of these sensors is the lack of chemical selectivity. Yet, a novel method called fluctuation-enhanced sensing (FES), which considers the sensor noise

APA, Harvard, Vancouver, ISO, and other styles

16

Meinen, J., J. Thieser, U. Platt, and T. Leisner. "Using a high finesse optical resonator to provide a long light path for differential optical absorption spectroscopy: CE-DOAS." Atmospheric Chemistry and Physics Discussions 8, no. 3 (2008): 10665–95. http://dx.doi.org/10.5194/acpd-8-10665-2008.

Full text

Abstract:

Abstract. Cavity enhanced methods in absorption spectroscopy have seen a considerable increase in popularity during the past decade. Especially Cavity Enhanced Absorption Spectroscopy (CEAS) established itself in atmospheric trace gas detection by providing tens of kilometers of effective light path length using a cavity as short as 1 m. In this paper we report on the construction and testing of a compact and power efficient light emitting diode based broadband Cavity Enhanced Differential Optical Absorption Spectrometer (CE-DOAS) for in situ field observation of atmospheric NO3. This device c

APA, Harvard, Vancouver, ISO, and other styles

17

Birks, John W., Peter C. Andersen, Craig J. Williford, et al. "Folded tubular photometer for atmospheric measurements of NO<sub>2</sub> and NO." Atmospheric Measurement Techniques 11, no. 5 (2018): 2821–35. http://dx.doi.org/10.5194/amt-11-2821-2018.

Full text

Abstract:

Abstract. We describe and characterize a modular folded tubular photometer for making direct measurements of the concentrations of nitrogen dioxide (NO2) and specify how this method could be extended to measure other pollutants such as sulfur dioxide (SO2), ozone (O3), and black carbon particulate matter. Direct absorbance measurements using this photometer can be made across the spectral range from the ultraviolet (UV) to the near infrared. The absorbance cell makes use of modular components (tubular detection cells and mirror cubes) that allow construction of path lengths of up to 2 m or mor

APA, Harvard, Vancouver, ISO, and other styles

18

Piel, Felix, Markus Müller, Klaus Winkler, Jenny Skytte af Sätra, and Armin Wisthaler. "Introducing the extended volatility range proton-transfer-reaction mass spectrometer (EVR PTR-MS)." Atmospheric Measurement Techniques 14, no. 2 (2021): 1355–63. http://dx.doi.org/10.5194/amt-14-1355-2021.

Full text

Abstract:

Abstract. Proton-transfer-reaction mass spectrometry (PTR-MS) is widely used in atmospheric sciences for measuring volatile organic compounds in real time. In the most widely used type of PTR-MS instruments, air is directly introduced into a chemical ionization reactor via an inlet capillary system. The reactor has a volumetric exchange time of ∼0.1 s, enabling PTR-MS analyzers to measure at a frequency of 10 Hz. The time response does, however, deteriorate if low-volatility analytes interact with surfaces in the inlet or in the instrument. Herein, we present the extended volatility range (EVR

APA, Harvard, Vancouver, ISO, and other styles

19

Meinen, J., J. Thieser, U. Platt, and T. Leisner. "Technical Note: Using a high finesse optical resonator to provide a long light path for differential optical absorption spectroscopy: CE-DOAS." Atmospheric Chemistry and Physics 10, no. 8 (2010): 3901–14. http://dx.doi.org/10.5194/acp-10-3901-2010.

Full text

Abstract:

Abstract. Cavity enhanced methods in absorption spectroscopy have seen a considerable increase in popularity during the past decade. Especially Cavity Enhanced Absorption Spectroscopy (CEAS) established itself in atmospheric trace gas detection by providing tens of kilometers of effective light path length using a cavity as short as 1 m. In this paper we report on the construction and testing of a compact and power efficient light emitting diode based broadband Cavity Enhanced Differential Optical Absorption Spectrometer (CE-DOAS) for in situ observation of atmospheric NO3. This device combine

APA, Harvard, Vancouver, ISO, and other styles

20

Dobeic, Martin, Vincenc Butala, Matjaž Prek, Jan Leskovšek, and Žiga Švegelj. "Fundamentals of Odour Assessment in Slovenia." Strojniški vestnik – Journal of Mechanical Engineering 66, no. 11 (2020): 642–54. http://dx.doi.org/10.5545/sv-jme.2020.6795.

Full text

Abstract:

From a sociological and economic perspective, odour pollution is one of the most complex problems in the field of air quality. Therefore, various approaches and odour impact criteria are particularly relevant when assessing odour exposure in the areas of different land use. The number of odour assessment methods is limited, and the lack of analytical techniques to determine odour concentration makes odour assessment even more complex. It is essential to analyse the spatial and temporal distribution of odour concentrations in order to assess odour nuisance in the ambient air. Since sampling of

APA, Harvard, Vancouver, ISO, and other styles

21

Julit, Healice, Nafisah Khalid, Abdul Rauf Abdul Rasam, Mohamad Hezri Razali, and Maisarah Abdul Halim. "Spatial-Temporal Analysis of Air Pollutant Concentrations in Relation to Land Use and School Environment." Alinteri Journal of Agriculture Sciences 36, no. 1 (2021): 568–82. http://dx.doi.org/10.47059/alinteri/v36i1/ajas21080.

Full text

Abstract:

Excessive exposure schoolchildren to air pollution can lead to long-lasting health problems, allergies and respiratory disease. It is well known that the major factors contributing to increase of air pollution are motor vehicles and industries. Thus, it is important to analyze the spatial temporal air pollutant concentrations and its relation with school location as the location of schools and its surrounding can increase their exposure. In this study, six schools in Johor were selected and the land use surrounding the schools were updated using ArcGIS. The Inverse Distance Weighting (IDW) int

APA, Harvard, Vancouver, ISO, and other styles

22

Arango, Tamara, Roberto Besteiro, Juan A. Ortega, Ángel Castro, Manuel Ramiro Rodríguez, and María D. Fernández. "Linear Models for the Prediction of Animal Zone Ammonia in a Weaned Piglet Building." Agronomy 11, no. 10 (2021): 1927. http://dx.doi.org/10.3390/agronomy11101927.

Full text

Abstract:

Measuring ammonia inside livestock buildings poses many challenges that hinder the incorporation of this variable into environmental control systems. The aim of this study was to measure various microclimate variables inside a weaned piglet building and analyse their interactions with NH3 concentrations for setpoint temperatures of 26 and 25 °C, in order to control NH3 concentrations based on other easily measurable variables. The experimental test was conducted on a conventional farm in Northwest Spain. NH3 concentrations in the animal zone were best correlated with CO2 concentrations in the

APA, Harvard, Vancouver, ISO, and other styles

23

Prasad, N. V. Krishna, M. S. S. R. K. N. Sarma, P. Sasikala, Naga Raju M, and N. Madhavi. "Regression Model to Analyse Air Pollutants Over a Coastal Industrial Station Visakhapatnam ( India )." International Journal on Data Science 1, no. 2 (2020): 107–13. http://dx.doi.org/10.18517/ijods.1.2.107-113.2020.

Full text

Abstract:

Particulate matter concentration and its study has gained tremendous significance in view of increase in air pollution. Since air pollution has many adverse effects on mankind, measures may be taken by observing the trends in PM2.5 (particulate matter) and concentrations of pollutants like NO2, SO2, NO2, NO, NOx, CO, NH3 and RH(Relative Humidity) as well as temperature. Even though continuous monitoring of air pollution in urban locations has been increasing in view of its huge impact on the sustainable development and ecological balance a regression model is essential always to analyse large

APA, Harvard, Vancouver, ISO, and other styles

24

Noviks, Gotfrīds, and Andris Skromulis. "THE ANALYSE OF AIR ENVIRONMENT QUALITY MONITORING IMPROVEMENT POSSIBILITIES." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (August 3, 2015): 273. http://dx.doi.org/10.17770/etr2009vol1.1111.

Full text

Abstract:

Paper presents the results of air pollution analyses during last 8 years in Rezekne city. There is carried out a research of atmospheric dust particles, found correlations between concentrations of different air pollutants. Is given overview about air quality measurements in other countries, pointed out air ionization importance on air quality evaluation. The aim of the research – to ground the extension of air quality monitoring indicators including parameters of the air ionisation and to work out an action program to improve an air quality in working areas and recreating zones.

APA, Harvard, Vancouver, ISO, and other styles

25

Ryu, Jieun, Chan Park, and Seong Woo Jeon. "Mapping and Statistical Analysis of NO2 Concentration for Local Government Air Quality Regulation." Sustainability 11, no. 14 (2019): 3809. http://dx.doi.org/10.3390/su11143809.

Full text

Abstract:

With the growing interest in healthy living worldwide, there has been an increasing demand for more accurate measurements of the concentrations of air pollutants such as NO2. In particular, analyzing the characteristics and sources of air pollutants by region could improve the effectiveness of environmental policies applied in accordance with the environmental characteristics of individual regions. In this study, a detailed nationwide NO2 concentration map was generated using the cokriging interpolation technique, which integrates ground observations and satellite image data. The root-mean-squ

APA, Harvard, Vancouver, ISO, and other styles

26

Cichowicz, Robert, and Grzegorz Wielgosiński. "Effect Of Urban Traffic On The Immission Of Carbon Dioxide In The University Campus." Ecological Chemistry and Engineering S 22, no. 2 (2015): 189–200. http://dx.doi.org/10.1515/eces-2015-0010.

Full text

Abstract:

Abstract The condition and quality of atmospheric air plays a very important role in the life of every living organism, including man. Every day we breathe atmospheric air containing CO2 whose level changes depending both on many external factors and physicochemical processes. The concentration of carbon dioxide in the air changes, among other things, due to the influence of communication routes which may adversely affect the environment. For this reason it is necessary to analyze changes in CO2 concentrations and try to determine their impact on the functioning of users of the area (so, one c

APA, Harvard, Vancouver, ISO, and other styles

27

Huzlík, Jiří, Jitka Hegrová, Karel Effenberger, Roman Ličbinský, and Martin Brtnický. "Air Quality in Brno City Parks." Atmosphere 11, no. 5 (2020): 510. http://dx.doi.org/10.3390/atmos11050510.

Full text

Abstract:

Parks embody an important element of urban infrastructure and a basic type of public space that shapes the overall character of a city. They form a counterweight to built-up areas and public spaces with paved surfaces. In this context, parks compensate for the lack of natural, open landscapes in cities and thus have a fundamental impact on the quality of life of their inhabitants. For this reason, it is important to consider the quality of the environment in urban parks, air quality in particular. Concentrations of gaseous pollutants, namely, nitric oxide (NO), nitrogen dioxide (NO2), and ozon

APA, Harvard, Vancouver, ISO, and other styles

28

Suryati, Isra, Hafizhul Khair, and Deni Gusrianti. "Distribution analysis of nitrogen dioxide (NO2) and ozone (O3) in Medan city with Geographic Information System (GIS)." MATEC Web of Conferences 276 (2019): 06013. http://dx.doi.org/10.1051/matecconf/201927606013.

Full text

Abstract:

The development of industry and the increase of transportation mode are directly proportional to the decrease in air quality. Some important pollutants have a negative impact on human health and the environment such as nitrogen dioxide (NO2) and ozone (O3). Distribution of NO2 and O3 concentrations from various sources of emissions in urban areas will provide basic information in the determination of policies, programs and regulations related to air pollution control. This study aims to map and analyze the concentration distribution of NO2 and O3 pollutants in Medan City. This research was con

APA, Harvard, Vancouver, ISO, and other styles

29

Baek, Jong In, and Yong Un Ban. "The Impacts of Urban Air Pollution Emission Density on Air Pollutant Concentration Based on a Panel Model." Sustainability 12, no. 20 (2020): 8401. http://dx.doi.org/10.3390/su12208401.

Full text

Abstract:

In terms of urban planning, the impact of urbanization and high density on the environment is a major issue. This study intended to analyze the effect of spatial density characteristics of urban air pollution sources on urban air pollution concentration using a panel model. As the total population density, the number of cars registered per capita, and the total emission facility density increased, together with a closer distance to a thermal power plant, the nitrogen dioxide(NO2) concentration increased. Net population density was also found to have the greatest impact on the structure and den

APA, Harvard, Vancouver, ISO, and other styles

30

Pereira, Marcelo, Arlindo Tribess, Giorgio Buonanno, Luca Stabile, Mauro Scungio, and Ilaria Baffo. "Particle and Carbon Dioxide Concentration Levels in a Surgical Room Conditioned with a Window/Wall Air-Conditioning System." International Journal of Environmental Research and Public Health 17, no. 4 (2020): 1180. http://dx.doi.org/10.3390/ijerph17041180.

Full text

Abstract:

One of the most important functions of air conditioning systems in operating rooms is to protect occupants against pathogenic agents transported by air. This protection is done by simultaneously controlling the air distribution, temperature, humidity, filtration and infiltration from other areas etc. Due to their low price, simple installation, operation and maintenance, window/wall air conditioning system have largely been used in operating rooms in Brazil, even if these types of equipment only recirculate the air inside the room without appropriate filtration and renovation with outdoor air.

APA, Harvard, Vancouver, ISO, and other styles

31

Sysalova, Jirina, Jirina Szakova, Walter Goessler, and Jana Tremlova. "Methodological study of extraction procedures applied to urban particulate matter." Open Chemistry 9, no. 6 (2011): 1071–79. http://dx.doi.org/10.2478/s11532-011-0097-4.

Full text

Abstract:

AbstractThe modified BCR three-step sequential extraction procedure has been applied to two different samples of urban particulate matters (PM). The distribution of selected trace elements As, Cd, Cr, Mn, Ni, Pb, Zn was investigated and, in a comparative study, the presence of common organic air filters in extraction procedures was evaluated. Analytes in separate fractions were determined by ICP-OES and GFAAS, respectively, depending on concentration levels. While, due to air filters, a significant increase of some analytes mobility in individual fractions has been observed in case of the jet-

APA, Harvard, Vancouver, ISO, and other styles

32

Tian, Jiaqi, Chunsheng Fang, Jiaxin Qiu, and Ju Wang. "Analysis of Pollution Characteristics and Influencing Factors of Main Pollutants in the Atmosphere of Shenyang City." Atmosphere 11, no. 7 (2020): 766. http://dx.doi.org/10.3390/atmos11070766.

Full text

Abstract:

Air pollution is one of the most concerning environmental problems in cities. Hourly data on pollutant concentrations from 11 automatic atmospheric monitoring stations and meteorological data in Shenyang from 2017 to 2019 were used to analyze the spatio-temporal variation rules of CO (carbon monoxide), SO2 (sulfur dioxide), NO2 (nitrogen dioxide), O3 (ozone), PM2.5 and PM10 (PM particles with an aerodynamic diameters of not more than 2.5 µm and 10 µm) and their relationships with meteorological parameters. Meanwhile, the regional transmission route of pollutants was analyzed by the hybrid sing

APA, Harvard, Vancouver, ISO, and other styles

33

Wang, Juan, and Zheng Hai Wang. "Trace Elements Geochemistry of Soil-Plant System in Puxiong Lead-Zinc Mining Area, Yunnan, China." Advanced Materials Research 726-731 (August 2013): 239–44. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.239.

Full text

Abstract:

This study aims to obtain an overview of trace elements concentrations in rocks, soils and plants from Puxiong lead-zinc mining area in Yunnan, China, and analyze the connection as well. Concentrations of Ba, Cd, Co, Cu, Mn, Pb, Zn, As, Sb, Hg, Sn, Ni and Sr among soils, rocks and three dominant plants in mining area, transition area and background were measured. Ratio parameter, bioconcentration factors (BF) and Pearson's correlation coefficients were used to analyze the relationship between these elements in different feature. The results indicate that rocks, soils and plants samples are all

APA, Harvard, Vancouver, ISO, and other styles

34

Deng, Xiaomei, Wenyuan Yang, Shuhua Li, Hong Liang, Zenan Shi, and Zhiwei Qiao. "Large-Scale Screening and Machine Learning to Predict the Computation-Ready, Experimental Metal-Organic Frameworks for CO2 Capture from Air." Applied Sciences 10, no. 2 (2020): 569. http://dx.doi.org/10.3390/app10020569.

Full text

Abstract:

The rising level of CO2 in the atmosphere has attracted attention in recent years. The technique of capturing CO2 from higher CO2 concentrations, such as power plants, has been widely studied, but capturing lower concentrations of CO2 directly from the air remains a challenge. This study uses high-throughput computer (Monte Carlo and molecular dynamics simulation) and machine learning (ML) to study 6013 computation-ready, experimental metal-organic frameworks (CoRE-MOFs) for CO2 adsorption and diffusion properties in the air with very low concentrations of CO2. First, the law influencing CO2 a

APA, Harvard, Vancouver, ISO, and other styles

35

Skromulis, Andris, and Juris Breidaks. "Effect of Environmental Factors on Air Ion Concentration." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (June 17, 2015): 274. http://dx.doi.org/10.17770/etr2015vol2.241.

Full text

Abstract:

<p class="R-AbstractKeywords"><span lang="EN-US">The paper discusses and analyzes the effect of environmental factors on ion concentrations in urban air. Statistically mathematical method was used to analyze the measurements of air ion concentration collected in a period of several months, with ion size ranging from 0.75 to 36.6 nm. As environmental factors related to air ions, the following chemical and physical parameters of the atmospheric air were analyzed: CO, NO, NO<sub>2</sub>, NO<sub>x</sub>, SO<sub>2</sub>, O<sub>3</sub>, PM1

APA, Harvard, Vancouver, ISO, and other styles

36

González, Fj Egea, M. L. Castro Cano, J. L. Martínez Vidal, and M. Martínez Galera. "Analyses of Chlorothalonil and Dichlofluanid in Greenhouse Air." Journal of AOAC INTERNATIONAL 80, no. 5 (1997): 1091–97. http://dx.doi.org/10.1093/jaoac/80.5.1091.

Full text

Abstract:

Abstract A method to sample and analyze chlorothalonil and dichlofluanid in greenhouse air was evaluated. Analysis was performed by gas chromatography with electron capture detection and gas chromatography- mass spectrometry. Solid sorbents such as Chromosorb 102, Porapak R, Supelpak-2, AmberliteXAD-2, Amberlite XAD-4, and polyurethane foam were studied. The use of Soxhlet extraction and solvent desorption with sonication to desorb the pesticides from these sorbents were compared.A procedure to generate atmospheres containing known concentrations of these fungicides was established to study so

APA, Harvard, Vancouver, ISO, and other styles

37

Filak, Mariusz, and Szymon Hoffman. "Study of Trends in Concentrations of Basic Air Pollutants in the Malopolska Province." Ecological Chemistry and Engineering S 27, no. 4 (2020): 567–78. http://dx.doi.org/10.2478/eces-2020-0035.

Full text

Abstract:

Abstract The purpose of the paper was to analyse the trends observed at air monitoring stations in the Malopolska Province - one of the most polluted regions in Poland. The study was carried out on the basis of long-term measurement data registered at five selected stations of automatic monitoring of air quality in the Malopolska Province. Trends evaluation was made on the basis of mean annual concentrations, taken from the database of the Chief Inspectorate for Environmental Protection in Poland. Separately for each basic air pollutant, such as SO2, NO2, NOx, CO, PM10 and O3, trend lines and

APA, Harvard, Vancouver, ISO, and other styles

38

Bergamaschi, Roberto, Maria Cristina Monti, Leonardo Trivelli, et al. "PM2.5 exposure as a risk factor for multiple sclerosis. An ecological study with a Bayesian mapping approach." Environmental Science and Pollution Research 28, no. 3 (2020): 2804–9. http://dx.doi.org/10.1007/s11356-020-10595-5.

Full text

Abstract:

AbstractSome environmental factors are associated with an increased risk of multiple sclerosis (MS). Air pollution could be a main one. This study was conducted to investigate the association of particulate matter 2.5 (PM2.5) concentrations with MS prevalence in the province of Pavia, Italy. The overall MS prevalence in the province of Pavia is 169.4 per 100,000 inhabitants. Spatial ground-level PM2.5 gridded data were analysed, by municipality, for the period 2010–2016. Municipalities were grouped by tertiles according to PM2.5 concentration. Ecological regression and Bayesian statistics were

APA, Harvard, Vancouver, ISO, and other styles

39

Srinives, Sira, Worasak Klongthong, Kanin Selamassakul, et al. "A Development of Graphene Based Chemiresistive Sensor: Demonstrations on pH Sensing, and Cell Detection." Advanced Materials Research 1103 (May 2015): 137–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1103.137.

Full text

Abstract:

Graphene is a single-to-few layer carbon sheet, consisting of carbon atoms hybridizing with one another via sp2 configuration, providing outstanding mechanical, electrical, and electrochemical properties that can be utilized in various applications. In this work, we synthesized graphene powder via a modified Hummers method to obtain electrically insulating graphene oxide (GO), and converted the GO to semiconducting reduced graphene oxide (rGO) using L-ascorbic acid as a reducing agent. The rGO was re-dispersed in DI water and cast on prefabricated electrodes to create an rGO film chemiresistiv

APA, Harvard, Vancouver, ISO, and other styles

40

Yue, Cui, Zhao Yuxin, Zhang Nan, Zhang Dongyou, and Yang Jiangning. "An inversion model for estimating the negative air ion concentration using MODIS images of the Daxing’anling region." PLOS ONE 15, no. 11 (2020): e0242554. http://dx.doi.org/10.1371/journal.pone.0242554.

Full text

Abstract:

The negative air ion (NAI) concentration is an essential indicator of air quality and atmospheric pollution. The NAI concentration can be used to monitor air quality on a regional scale and is commonly determined using field measurements. However, obtaining these measurements is time-consuming. In this paper, the relationship between remotely sensed surface parameters (such as land surface temperature, normalized difference vegetation index (NDVI), and leaf area index) obtained from MODIS data products and the measured NAI concentration using a stepwise regression method was analyzed to estima

APA, Harvard, Vancouver, ISO, and other styles

41

Wu, Jindong, Jiantao Weng, Bing Xia, Yujie Zhao, and Qiuji Song. "The Synergistic Effect of PM2.5 and CO2 Concentrations on Occupant Satisfaction and Work Productivity in a Meeting Room." International Journal of Environmental Research and Public Health 18, no. 8 (2021): 4109. http://dx.doi.org/10.3390/ijerph18084109.

Full text

Abstract:

High indoor air quality is crucial for the health of human beings. The purpose of this work is to analyze the synergistic effect of particulate matter 2.5 (PM2.5) and carbon dioxide (CO2) concentration on occupant satisfaction and work productivity. This study carried out a real-scale experiments in a meeting room with exposures of up to one hour. Indoor environment parameters, including air temperature, relative humidity, illuminance, and noise level, were controlled at a reasonable level. Twenty-nine young participants were participated in the experiments. Four mental tasks were conducted to

APA, Harvard, Vancouver, ISO, and other styles

42

De Angelis, Elena, Claudio Carnevale, Enrico Turrini, and Marialuisa Volta. "Source Apportionment and Integrated Assessment Modelling for Air Quality Planning." Electronics 9, no. 7 (2020): 1098. http://dx.doi.org/10.3390/electronics9071098.

Full text

Abstract:

In Northern Italy a large fraction of the population is exposed to PM10 and PM2.5 concentrations that exceed the European limit values and the stricter WHO air quality guidelines. For this reason, in 2017 four Regions (Piemonte, Lombardia, Veneto, and Emilia Romagna) and the national Ministry of the Environment adopted a set of joint measures, namely the “Po Basin air quality plan”. The plan mainly tackles emission from road transport, residential heating, and agriculture. Air quality plans at regional and local scale are usually implemented defining a set of emission abatement measures, start

APA, Harvard, Vancouver, ISO, and other styles

43

Pouyaei, Arman, Yunsoo Choi, Jia Jung, Bavand Sadeghi, and Chul Han Song. "Concentration Trajectory Route of Air pollution with an Integrated Lagrangian model (C-TRAIL Model v1.0) derived from the Community Multiscale Air Quality Model (CMAQ Model v5.2)." Geoscientific Model Development 13, no. 8 (2020): 3489–505. http://dx.doi.org/10.5194/gmd-13-3489-2020.

Full text

Abstract:

Abstract. This paper introduces a novel Lagrangian model (Concentration Trajectory Route of Air pollution with an Integrated Lagrangian model, C-TRAIL version 1.0) output from a Eulerian air quality model for validating the source–receptor direct link by following polluted air masses. To investigate the concentrations and trajectories of air masses simultaneously, we implement the trajectory-grid (TG) Lagrangian advection scheme in the CMAQ (Community Multiscale Air Quality) Eulerian model version 5.2. The TG algorithm follows the concentrations of representative air “packets” of species along

APA, Harvard, Vancouver, ISO, and other styles

44

Tong, Hongjin, Sha Liu, Ruixue Liao, et al. "Temporal-spatial Distribution Characteristics of Air Pollutants in Chengdu Economic Region, China." E3S Web of Conferences 118 (2019): 04027. http://dx.doi.org/10.1051/e3sconf/201911804027.

Full text

Abstract:

The previous characteristics researches of air pollution were almost based on data from national environmental monitoring stations in 2015. The temporal variation curves of air pollutants and the ArcGIS grid interpolation method were used to analyze the spatial-temporal variation of air pollutants in five cities of Chengdu economic region. In 2015, the monthly change trends of PM2.5, PM10, CO, NO2 and NO of air pollutants in Chengdu economic region were basically the same. The maximum monthly average concentration was in January or December, and the minimum was in May to September. The tempora

APA, Harvard, Vancouver, ISO, and other styles

45

Siva Kumar Reddy, Y., Karthik Balasubramanian, and VP Chandramohan. "Thermal energy analysis on liquid desiccant air conditioning system at different desiccant solution parameters." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 5 (2019): 1052–65. http://dx.doi.org/10.1177/0954408919825721.

Full text

Abstract:

Selection of suitable liquid desiccant operating parameters plays a significant role in the design of energy efficient liquid desiccant air conditioning system. To achieve same dehumidification rate from ambient air, different combinations of solution parameters (heat capacity ratio, concentration, and vapor pressure) could be employed in the system. Considering dehumidifier air inlet condition and dehumidification rates are fixed, an analytical study is carried out on the thermal energy analysis of the system at different solution operating parameters. Operating parameters considered in this

APA, Harvard, Vancouver, ISO, and other styles

46

Jacob, R. H., D. W. Pethick, P. Clark, D. N. D'Souza, D. L. Hopkins, and J. White. "Quantifying the hydration status of lambs in relation to carcass characteristics." Australian Journal of Experimental Agriculture 46, no. 4 (2006): 429. http://dx.doi.org/10.1071/ea04093.

Full text

Abstract:

An experiment was undertaken to determine the physiological effects of water deprivation on lambs before slaughter. The aim of this experiment was to develop a method for quantifying the hydration status of lambs in relation to any subsequent effects on carcass and meat characters. Forty-eight crossbred lambs were subjected to 1 of 4 treatments: (i) normal ambient air temperature with access to water; (ii) normal ambient with no access to water; (iii) high ambient air temperature with access to water; and (iv) high ambient air temperature with no access to water. The treatments were imposed fo

APA, Harvard, Vancouver, ISO, and other styles

47

Gorai, Amit Kumar, Paul B. Tchounwou, SS Biswal, and Francis Tuluri. "Spatio-Temporal Variation of Particulate Matter(PM2.5) Concentrations and Its Health Impacts in a Mega City, Delhi in India." Environmental Health Insights 12 (January 2018): 117863021879286. http://dx.doi.org/10.1177/1178630218792861.

Full text

Abstract:

Rising concentration of air pollution and its associated health effects is rapidly increasing in India, and Delhi, being the capital city, has drawn our attention in recent years. This study was designed to analyze the spatial and temporal variations of particulate matter (PM2.5) concentrations in a mega city, Delhi. The daily PM2.5 concentrations monitored by the Central Pollution Control Board (CPCB), New Delhi during November 2016 to October 2017 in different locations distributed in the region of the study were used for the analysis. The descriptive statistics indicate that the spatial mea

APA, Harvard, Vancouver, ISO, and other styles

48

Rouboa, Abel, Valter Silva, and Nuno Couto. "Exergy Analysis in Hydrogen-Air Detonation." Journal of Applied Mathematics 2012 (2012): 1–16. http://dx.doi.org/10.1155/2012/502979.

Full text

Abstract:

The main goal of this paper is to analyze the exergy losses during the shock and rarefaction wave of hydrogen-air mixture. First, detonation parameters (pressure, temperature, density, and species mass fraction) are calculated for three cases where the hydrogen mass fraction in air is 1.5%, 2.5%, and 5%. Then, exergy efficiency is used as objective criteria of performance evaluation. A two-dimensional computational fluid dynamic code is developed using Finite volume discretization method coupled with implicit scheme for the time discretization (Euler system equations). A seven-species and five

APA, Harvard, Vancouver, ISO, and other styles

49

Pierce, A., D. Obrist, H. Moosmüller, X. Faïn, and C. Moore. "A cavity ring-down spectroscopy sensor for measurements of gaseous elemental mercury – Part 1: Development for high time resolution measurements in ambient air." Atmospheric Measurement Techniques Discussions 5, no. 6 (2012): 8995–9020. http://dx.doi.org/10.5194/amtd-5-8995-2012.

Full text

Abstract:

Abstract. The ability to make high time resolution measurements of gaseous elemental mercury (GEM) concentrations in air is imperative for the understanding of mercury cycling. Here we describe further development and field implementation of a laboratory prototype pulsed cavity ring-down spectroscopy (CRDS) system for high time resolution, continuous and automated measurement of GEM concentrations in ambient air. In particular, we present use of an external, isotopically enriched Hg cell for automated wavelength locking and wavelength stabilization to maintain laser wavelength on the peak of G

APA, Harvard, Vancouver, ISO, and other styles

50

Chatterjee, P., and P. Das. "Association of Ambient Air Quality with Male’s Pulmonary Function in Kolkata City, India." Kathmandu University Medical Journal 13, no. 1 (2015): 24–28. http://dx.doi.org/10.3126/kumj.v13i1.13748.

Full text

Abstract:

Background Kolkata is one of the polluted metropolitan cities in India where health effects of air pollution are raising serious concern.Objectives Purpose of the present study was to analyze association between levels of air pollutants and pulmonary function of adult males living in two different air pollutant zones of Kolkata.Methods Air pollution data of two ambient air quality monitoring stations located at Rabindrabharati and Victoria Memorial was collected from West Bengal Pollution Control Board, Kolkata for the period from January to March 2012. Study was conducted on 200 males (17-22

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!