Aerosol-associated non-polar organic compounds (NPOCs) at Jammu, India, in the North-Western Himalayan Region: seasonal variations in sources and processes

Yadav, Sher Singh; Bamotra, Sarita; Tandon, Ankit

doi:10.1007/s11356-020-08374-3

Cited by 10 publications

(2 citation statements)

References 73 publications

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“…The main sources of PAHs correlating with PC1 are markers of coal combustion (Pyr, BaA and Cry) and markers of vehicle (gasoline and diesel) emissions (BkF, BbF and BaP) or coal combustion and vehicle emission markers (Flt, Ant) (Limu et al 2013 ). The PAHs correlating with PC2 (Acl, Ace, Flu, Phe, Ant) suggest substantial contribution from low-temperature pyrolysis processes (like biomass combustion or coal combustion) (Yadav et al 2020 ).…”

Section: Resultsmentioning

confidence: 99%

Accumulation pattern of polycyclic aromatic hydrocarbons using Plantago lanceolata L. as passive biomonitor

Hubai

Kováts

Sainnokhoi

et al. 2021

Environ Sci Pollut Res

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Biomonitors are considered a cheap alternative of active air samplers, especially where spatial pattern of air quality is to be monitored, requiring numerous parallel measurements. Of higher plants, Plantago lanceolata L. has been proven a good monitor species with proper accumulation capacity. While biomonitoring studies are difficult to compare due to inherent errors such as the diverse plant material used in different studies, the No. 227 OECD GUIDELINE FOR THE TESTING OF CHEMICALS: Terrestrial Plant Test: Vegetative Vigour Test provides a tool to test extract of aerosol samples under controlled laboratory conditions. In our study, this guideline was followed to experimentally treat Plantago with the aqueous extract of a diesel exhaust sample. Accumulation pattern of polyaromatic hydrocarbons (PAHs) was assessed and compared to samples collected in the field. Unlike most studies reported in the literature, both in the experimentally treated and field Plantago samples, high ratio of high molecular weight PAHs was experienced. Distribution pattern of accumulated PAHs showed strong correlation between the experimentally treated sample and most of the field plantain samples, underlying the usefulness of laboratory treatments for bioaccumulation studies.

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Section: Resultsmentioning

confidence: 99%

Accumulation pattern of polycyclic aromatic hydrocarbons using Plantago lanceolata L. as passive biomonitor

Hubai

Kováts

Sainnokhoi

et al. 2021

Environ Sci Pollut Res

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“…Likewise, alkaloids were predominant in the polar extracts. Alkaloids exist predominantly in the polar form with a small amount of nonpolar properties (Yadav, Bamotra & Tandon 2020). This could be the reason why they were present in most of the extracts, because they dissolve in neutral water and polar organic solvents such as chloroform and methanol.…”

Section: Discussionmentioning

confidence: 99%

Phytochemical composition and chemical profiling of extracts of Cordia grandicalyx Oberm

Chauke

Mogale

Mdee

et al. 2022

JOMPED

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Background: The search for bioactive organic products for the treatment of various diseases is a growing concern worldwide, because these bioactive natural products are associated with fewer side effects and are easily accessible.Aim: The present study analysed the phytochemical constituents and cytotoxic effects of the leaf, bark and fruit extracts of Cordia grandicalyx Oberm.Setting: Plant samples were collected from Ga-Mashishimale village in Ba-Phalaborwa Municipality, South Africa.Methods: Antioxidant activity was determined through 1,1-diphenyl-2-picrylhydrazyl radical scavenging method, whilst cytotoxic assay was assessed using the 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide method. Plant extracts were subjected to phytochemical profiling using both qualitative and quantitative methods. The extracts were also subjected to fractionation using column chromatography and thin-layer chromatography, and the sub-fractions with considerable yields were identified using nuclear magnetic resonance (NMR).Results: The aqueous extracts of the bark and leaves had significant (p 0.001) antioxidant activity as compared to negative controls and ascorbic acid. Additionally, appreciable amounts of total phenolic and alkaloid contents were recorded on polar extracts, notably 200 mg/GAE and 140 mg/quercetin equivalents for leaf cold water and leaf hot water extracts, respectively. All extracts were not toxic to cells, whilst the positive control (H2O2) led to almost 100% demise of cells. Two compounds were isolated from the leaf acetone extracts collected from fraction 20 to 30 and fraction 101 to 120 and identified as α˗amyrin and β-amyrin by NMR spectral analysis.Conclusion: The study provided evidence supporting the screening of plants for the discovery of therapeutic compounds. The study also revealed that all the different C. grandicalyx extracts were less toxic to cells and may provide scientific backing for continued use of the plant in mixtures for the treatment of diseases.

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Aerosol-associated n-alkanes over Dhauladhar region of North-Western Himalaya: seasonal variations in sources and processes

Kaushal

Bamotra

Yadav

et al. 2020

Environ Monit Assess

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Aerosol-associated non-polar organic compounds (NPOCs) at Jammu, India, in the North-Western Himalayan Region: seasonal variations in sources and processes

Cited by 10 publications

References 73 publications

Accumulation pattern of polycyclic aromatic hydrocarbons using Plantago lanceolata L. as passive biomonitor

Accumulation pattern of polycyclic aromatic hydrocarbons using Plantago lanceolata L. as passive biomonitor

Phytochemical composition and chemical profiling of extracts of Cordia grandicalyx Oberm

Aerosol-associated n-alkanes over Dhauladhar region of North-Western Himalaya: seasonal variations in sources and processes

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