Heliyon

Article	Citations
Heavy metal pollution in the environment and their toxicological effects on humans	1671
The impact of physical activity on psychological health during Covid-19 pandemic in Italy	546
COVID pollution: impact of COVID-19 pandemic on global plastic waste footprint	361
Plastic pollution in the marine environment	342
Environmental effects of COVID-19 pandemic and potential strategies of sustainability	310
Commercial hydrogels for biomedical applications	272
Green synthesis of copper oxide nanoparticles for biomedical application and environmental remediation	243
Liposomes: structure, composition, types, and clinical applications	225
Photocatalytic degradation of methylene blue dye in aqueous solution by MnTiO3 nanoparticles under sunlight irradiation	221
Green synthesis of iron oxide nanoparticle using Carica papaya leaf extract: application for photocatalytic degradation of remazol yellow RR dye and antibacterial activity	219
COVID-19 pandemic, socioeconomic crisis and human stress in resource-limited settings: A case from Bangladesh	184
Environmental impact of bioplastic use: A review	182
SARS-CoV-2 spike protein S1 subunit induces pro-inflammatory responses via toll-like receptor 4 signaling in murine and human macrophages	177
Exploring COVID-19 stress and its factors in Bangladesh: A perception-based study	175
Lactic acid production – producing microorganisms and substrates sources-state of art	169
Innovative human resource management strategies during the COVID-19 pandemic: A systematic narrative review approach	162
Smart water quality monitoring system with cost-effective using IoT	154
Using an extended Technology Acceptance Model to understand students’ use of e-learning during Covid-19: Indonesian sport science education context	150
Purchase intention and purchase behavior online: A cross-cultural approach	147
Nanoparticles as antimicrobial and antiviral agents: A literature-based perspective study	134
Optimization of green biosynthesized visible light active CuO/ZnO nano-photocatalysts for the degradation of organic methylene blue dye	133
Barriers to distance learning during the COVID-19 outbreak: A qualitative review from parents’ perspective	132
Drug release study of the chitosan-based nanoparticles	131
Ibuprofen as an emerging organic contaminant in environment, distribution and remediation	128
Impact of age, sex, comorbidities and clinical symptoms on the severity of COVID-19 cases: A meta-analysis with 55 studies and 10014 cases	124

Activated carbon derived from waste orange and lemon peels for the adsorption of methyl orange and methylene blue dyes from wastewater	121
Recent progress in surface plasmon resonance based sensors: A comprehensive review	121
Multimedia tools in the teaching and learning processes: A systematic review	120
IL-6 and IL-10 as predictors of disease severity in COVID-19 patients: results from meta-analysis and regression	119
Production and processing of antioxidant bioactive peptides: A driving force for the functional food market	118
Application of nanotechnology in agriculture, postharvest loss reduction and food processing: food security implication and challenges	117
Farmers' choices and factors affecting adoption of climate change adaptation strategies: evidence from northwestern Ethiopia	117
HMGB1 as a potential biomarker and therapeutic target for severe COVID-19	114
Improving land-use change modeling by integrating ANN with Cellular Automata-Markov Chain model	113
Impact of absorber layer thickness, defect density, and operating temperature on the performance of MAPbI3 solar cells based on ZnO electron transporting material	112
The impact of entrepreneurship education and students' entrepreneurial mindset: the mediating role of attitude and self-efficacy	111
Economic growth in South Asia: the role of CO2 emissions, population density and trade openness	108
Metaheuristic algorithms for PID controller parameters tuning: review, approaches and open problems	106
Green synthesis of antimicrobial silver nanoparticles using aqueous leaf extracts from three Congolese plant species (Brillantaisia patula, Crossopteryx febrifuga and Senna siamea)	106
Multifunctional properties of spherical silver nanoparticles fabricated by different microbial taxa	104
Possibility of utilizing agriculture biomass as a renewable and sustainable future energy source	102
COVID-19 and household energy implications: what are the main impacts on energy use?	100
Utilization of food waste streams for the production of biopolymers	95
Phycoremediation mechanisms of heavy metals using living green microalgae: physicochemical and molecular approaches for enhancing selectivity and removal capacity	91
Development and initial psychometric properties of a panic buying scale during COVID-19 pandemic	91
Financial inclusion, economic growth, and poverty alleviation: evidence from eastern Indonesia	90
Crosstalk between the microbiota-gut-brain axis and depression	90
Aging - Oxidative stress, antioxidants and computational modeling	89
Plant growth-promoting rhizobacteria (PGPR) improve the growth and nutrient use efficiency in maize (Zea mays L.) under water deficit conditions	89
Effects of mobile augmented reality apps on impulse buying behavior: An investigation in the tourism field	89
Trade war effects: evidence from sectors of energy and resources in Africa	86
The global prevalence of depression, anxiety, stress, and, insomnia and its changes among health professionals during COVID-19 pandemic: A rapid systematic review and meta-analysis	86
Antiviral and immunomodulatory activity of curcumin: A case for prophylactic therapy for COVID-19	85
Smart parking systems: comprehensive review based on various aspects	84
Evaluation of smart and sustainable cities through a hybrid MCDM approach based on ANP and TOPSIS technique	83
Preparation and characterization of cellulose nanocrystal extracted from ramie fibers by sulfuric acid hydrolysis	82
Plastic wastes: environmental hazard and instrument for wealth creation in Nigeria	82
Additive manufacturing of Ti6Al4V alloy via electron beam melting for the development of implants for the biomedical industry	81
Investigating the cases of novel coronavirus disease (COVID-19) in China using dynamic statistical techniques	80
Adsorption and removal of crystal violet dye from aqueous solution by modified rice husk	80
Salicylic acid alleviated the effect of drought stress on photosynthetic characteristics and leaf protein pattern in winter wheat	80
Additive manufacturing of titanium-based alloys- A review of methods, properties, challenges, and prospects	80
Digital financial inclusion: A gateway to sustainable development	79
A review of green methods for phyto-fabrication of hematite (α-Fe2O3) nanoparticles and their characterization, properties, and applications	78
Adsorption of methyl violet dye onto a prepared bio-adsorbent from date seeds: isotherm, kinetics, and thermodynamic studies	77
Modeling domestic tourism: motivations, satisfaction and tourist behavioral intentions	76
Investigations on 2-(4-Cyanophenylamino) acetic acid by FT-IR,FT-Raman, NMR and UV-Vis spectroscopy, DFT (NBO, HOMO-LUMO, MEP and Fukui function) and molecular docking studies	76
Evolution of adsorption process for manganese removal in water via agricultural waste adsorbents	76
Environmentally sustainable processes for the synthesis of hydroxyapatite	75
Childhood diarrhoeal diseases in developing countries	75
Moving towards environmental sustainability: information and communication technology (ICT), freight transport, and CO2 emissions	75
Urban river pollution in Bangladesh during last 40 years: potential public health and ecological risk, present policy, and future prospects toward smart water management	74
Molecular docking, molecular dynamics, and in vitro studies reveal the potential of angiotensin II receptor blockers to inhibit the COVID-19 main protease	74
A systematic review on ethnopharmacology, phytochemistry and pharmacological aspects of Thymus vulgaris Linn.	74
Phytochemistry, pharmacological activity, and potential health benefits of Glycyrrhiza glabra	74

PV cells and modules – State of the art, limits and trends	74
Basic concepts and methodologies of DNA marker systems in plant molecular breeding	74
Green synthesis of silver nanoparticles using Hagenia abyssinica (Bruce) J.F. Gmel plant leaf extract and their antibacterial and anti-oxidant activities	73
Hemp as a potential raw material toward a sustainable world: A review	73
The nexus of environmental sustainability and agro-economic performance of Sub-Saharan African countries	73
Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model	73
The potential of terahertz sensing for cancer diagnosis	72
The influence of renewable energy usage on consumption-based carbon emissions in MINT economies	72
The use of plant extracts and their phytochemicals for control of toxigenic fungi and mycotoxins	71
The mediating effect of the cyberchondria and anxiety sensitivity in the association between problematic internet use, metacognition beliefs, and fear of COVID-19 among Iranian online population	71
Resilience effects in food consumption behaviour at the time of Covid-19: perspectives from Italy	71
SARS-CoV-2 RNA Dependent RNA polymerase (RdRp) – A drug repurposing study	70
Searching potential antiviral candidates for the treatment of the 2019 novel coronavirus based on DFT calculations and molecular docking	70
Molecular biology of coronaviruses: current knowledge	70
Statistical modeling and investigation of thermal characteristics of a new nanofluid containing cerium oxide powder	69
Rheological properties of composite polymers and hybrid nanocomposites	69
Fog computing at industrial level, architecture, latency, energy, and security: A review	69
Leptin levels in SARS-CoV-2 infection related respiratory failure: A cross-sectional study and a pathophysiological framework on the role of fat tissue	68
Telework: systematic literature review and future research agenda	68
Challenges of 3D printing technology for manufacturing biomedical products: A case study of Malaysian manufacturing firms	68
Nanomaterials in the advancement of hydrogen energy storage	68
Sugarcane bagasse - A source of cellulosic fiber for diverse applications	68
ICT, energy consumption, financial development, and environmental degradation in South Africa	67
Graphene oxide based coconut shell waste: synthesis by modified Hummers method and characterization	67
Multifunctional titanium dioxide nanoparticles biofabricated via phytosynthetic route using extracts of Cola nitida: antimicrobial, dye degradation, antioxidant and anticoagulant activities	67
Leadership styles, work engagement and outcomes among information and communications technology professionals: A cross-national study	67
Sustainable-green synthesis of silver nanoparticles using safflower (Carthamus tinctorius L.) waste extract and its antibacterial activity	67
Teaching during a pandemic: do university teachers prefer online teaching?	66
An investigation of affecting factors on MOF characteristics for biomedical applications: A systematic review	66
COVID-19 lockdown and its impact on tropospheric NO2 concentrations over India using satellite-based data	66
Phytoremediation potential of heavy metal accumulator plants for waste management in the pulp and paper industry	66
Transmission channels between financial development and CO2 emissions: A global perspective	65
Salivary SARS-CoV-2 load reduction with mouthwash use: A randomized pilot clinical trial	65
Viscous dissipation and joule heating effect on MHD flow and heat transfer past a stretching sheet embedded in a porous medium	65
Understanding the bearable link between ecology and health outcomes: the criticality of human capital development and energy use	65
Green synthesis and characterization of copper nanoparticles using Piper retrofractum Vahl extract as bioreductor and capping agent	64
The role of social media in spreading panic among primary and secondary school students during the COVID-19 pandemic: An online questionnaire study from the Gaza Strip, Palestine	64
Plastic microfibre pollution: how important is clothes’ laundering?	64
The use of Twitter by state leaders and its impact on the public during the COVID-19 pandemic	64
Predicting novel drugs for SARS-CoV-2 using machine learning from a >10 million chemical space	62
Renewable energy community and the European energy market: main motivations	61
Adopted walking condition for computational simulation approach on bearing of hip joint prosthesis: review over the past 30 years	61
Evaluation of ANN and ANFIS modeling ability in the prediction of AISI 1050 steel machining performance	61
A comprehensive review of energy sources for unmanned aerial vehicles, their shortfalls and opportunities for improvements	61
Design and performance optimisation of detergent product containing binary mixture of anionic-nonionic surfactants	61
Effect of silver nanoparticles on salt tolerance of Satureja hortensis l. during in vitro and in vivo germination tests	61
Telaprevir is a potential drug for repurposing against SARS-CoV-2: computational and in vitro studies	60
Global analysis of clinical trials with probiotics	60
The effect of traditional and improved solar drying methods on the sensory quality and nutritional composition of fruits: A case of mangoes and pineapples	59
Prevalence of anxiety and depression in South Asia during COVID-19: A systematic review and meta-analysis	58
Microplastics contamination in the soil from Urban Landfill site, Dhaka, Bangladesh	58
Modulation of Nrf2 by quercetin in doxorubicin-treated rats	58
Efficacy of a high-dose antiresorptive drug holiday to reduce the risk of medication-related osteonecrosis of the jaw (MRONJ): A systematic review	58
Isolation, purification and characterization of cellulase produced by Aspergillus niger cultured on Arachis hypogaea shells	57
Optimal network reconfiguration for power loss minimization and voltage profile enhancement in distribution systems	57
Comparison of conventional extraction technique with ultrasound assisted extraction on recovery of phenolic compounds from lemon scented tea tree (Leptospermum petersonii) leaves	57
The impact of tourism arrivals, tourism receipts and renewable energy consumption on quality of life: A panel study of Southern African region	57
A review of augmented reality systems and their effects on mental workload and task performance	57
Understanding satisfaction essentials of E-learning in higher education: A multi-generational cohort perspective	57
Melatonin induced changes in photosynthetic efficiency as probed by OJIP associated with improved chromium stress tolerance in canola (Brassica napus L.)	57
Probiotics, their prophylactic and therapeutic applications in human health development: A review of the literature	56
Coupling of chemical, electrochemical and theoretical approach to study the corrosion inhibition of mild steel by new quinoxaline compounds in 1 M HCl	56
How digital marketing evolved over time: A bibliometric analysis on scopus database	56
Impact assessment of trade on environmental performance: accounting for the role of government integrity and economic development in 79 countries	55
Photo-assisted bio-fabrication of silver nanoparticles using Annona muricata leaf extract: exploring the antioxidant, anti-diabetic, antimicrobial, and cytotoxic activities	55
Characteristics investigation on biofilm formation and biodegradation activities of Pseudomonas aeruginosa strain ISJ14 colonizing low density polyethylene (LDPE) surface	55
Dynamic connectedness and spillovers between Islamic and conventional stock markets: time- and frequency-domain approach in COVID-19 era	55
Alternative to FBS in animal cell culture - An overview and future perspective	55
Prospects and limitations of e-learning application in private tertiary institutions amidst COVID-19 lockdown in Nigeria	55
PES, molecular structure, spectroscopic (FT-IR, FT-Raman), electronic (UV-Vis, HOMO-LUMO), quantum chemical and biological (docking) studies on a potent membrane permeable inhibitor: dibenzoxepine der	55
3D-QSAR, docking and ADMET properties of aurone analogues as antimalarial agents	55
Status of tertiary level online class in Bangladesh: students’ response on preparedness, participation and classroom activities	55
Application of Artificial Intelligence powered digital writing assistant in higher education: randomized controlled trial	55
A systematic review on COVID-19 pandemic with special emphasis on curative potentials of Nigeria based medicinal plants	55
A study of college students' intention to use metaverse technology for basketball learning based on UTAUT2	54
SEM-ANN-based approach to understanding students’ academic-performance adoption of YouTube for learning during Covid	54
Industry 4.0 implementation and Triple Bottom Line sustainability: An empirical study on small and medium manufacturing firms	54
Reductive metabolites of curcumin and their therapeutic effects	54
Modification and characterization of chicken eggshell for possible catalytic applications	54
Impact of crop residue burning in Haryana on the air quality of Delhi, India	54

Physical inactivity and sedentary behaviors in the Bangladeshi population during the COVID-19 pandemic: An online cross-sectional survey	53
Development of biodegradable films based on purple yam starch/chitosan for food application	53
Analysis of factors affecting project communications with a hybrid DEMATEL-ISM approach (A case study in Iran)	53
Phytochemical screening, polyphenols, flavonoids and tannin content, antioxidant activities and FTIR characterization of Marrubium vulgare L. from 2 different localities of Northeast of Morocco	53
Machine learning glass transition temperature of polymers	53
Adsorptive removal of Rhodamine B dye from aqueous solution by using graphene–based nickel nanocomposite	53
QSAR, molecular docking and ADMET properties in silico studies of novel 4,5,6,7-tetrahydrobenzo[D]-thiazol-2-Yl derivatives derived from dimedone as potent anti-tumor agents through inhibition of C-Me	53
MHD radiative nanofluid flow induced by a nonlinear stretching sheet in a porous medium	53
Effect of dual surface cooling of solar photovoltaic panel on the efficiency of the module: experimental investigation	52
Synthesis, single crystal (XRD), Hirshfeld surface analysis, computational study (DFT) and molecular docking studies of (E)-4-((2-hydroxy-3,5-diiodobenzylidene)amino)-N-(pyrimidine)-2-yl) benzenesulfo	52
Green synthesis of silver nanoparticles using aqueous extract of Acacia cyanophylla and its antibacterial activity	52
Superstatistics of Schrödinger equation with pseudo-harmonic potential in external magnetic and Aharanov-Bohm fields	52
Integrative analyses of SARS-CoV-2 genomes from different geographical locations reveal unique features potentially consequential to host-virus interaction, pathogenesis and clues for novel therapies	52
Deep learning for automated classification of tuberculosis-related chest X-Ray: dataset distribution shift limits diagnostic performance generalizability	52
Improper disposal practice of unused and expired pharmaceutical products in Indonesian households	52
Spectroscopic characterization of humic and fulvic acids in soil aggregates, Brazil	52
γ-Aminobutyric acid found in fermented foods and beverages: current trends	51
Kinetics of thermal degradation and lifetime study of poly(vinylidene fluoride) (PVDF) subjected to bioethanol fuel accelerated aging	51
Recent advances in Shrimp aquaculture wastewater management	50
Mobile health applications for disease screening and treatment support in low-and middle-income countries: A narrative review	50
Rheological and mechanical properties of edible gel materials for 3D food printing technology	50
Physicochemical and biopharmaceutical aspects influencing skin permeation and role of SLN and NLC for skin drug delivery	50
Synthesis and characterization of coal fly ash and palm oil fuel ash modified artisanal and small-scale gold mine (ASGM) tailings based geopolymer using sugar mill lime sludge as Ca-based activator	50
A review on control and fault-tolerant control systems of AC/DC microgrids	50
Comparative study on larvicidal activity of green synthesized silver nanoparticles and Annona glabra (Annonaceae) aqueous extract to control Aedes aegypti and Aedes albopictus (Diptera: Culicidae)	49
Adoption of climate-smart agricultural practices among smallholder farmers in Western Kenya: do socioeconomic, institutional, and biophysical factors matter?	49
Customer review or influencer endorsement: which one influences purchase intention more?	49
Ethical leadership, corporate social responsibility, firm reputation, and firm performance: A serial mediation model	49
Computational and numerical wave solutions of the Caudrey–Dodd–Gibbon equation	49
Thermodynamic, exergo-economic and exergo-environmental analysis of hybrid geothermal-solar power plant based on ORC cycle using emergy concept	49
Understanding the determinants of climate change adaptation strategies among smallholder maize farmers in South-west, Nigeria	49
Study of microbiome changes in patients with ulcerative colitis in the Central European part of Russia	49
Drug combination and repurposing for cancer therapy: the example of breast cancer	48
Perfluoroalkyl substances exposure and immunity, allergic response, infection, and asthma in children: review of epidemiologic studies	48
Exopolysaccharides from bacteria and fungi: current status and perspectives in Africa	48
Functional and molecular characterization of plant growth promoting Bacillus isolates from tomato rhizosphere	48
Computational studies of a series of 2-substituted phenyl-2-oxo-, 2-hydroxyl- and 2-acylloxyethylsulfonamides as potent anti-fungal agents	48
Comparative investigation of the growth-poverty-inequality trilemma in Sub-Saharan Africa and Latin American and Caribbean Countries	48
The development of learning innovation to enhance higher order thinking skills for students in Thailand junior high schools	48
A scoping review on biochar-based fertilizers: enrichment techniques and agro-environmental application	48
The influence of corruption on environmental sustainability in the developing economies of Southern Africa	47
Challenges of adopting sustainable technologies in e-waste management at Agbogbloshie, Ghana	47
Agricultural value of Black Soldier Fly larvae frass as organic fertilizer on ryegrass	47
Recent advances in topical carriers of anti-fungal agents	47
The impact of COVID-19 pandemic on students’ learning in higher education in Afghanistan	47
Use of bacterial isolates in the treatment of textile dye wastewater: A review	47
Concurrent investigation of antimony chalcogenide (Sb2Se3 and Sb2S3)-based solar cells with a potential WS2 electron transport layer	47
The impact of the COVID-19 pandemic on students’ feelings at high school, undergraduate, and postgraduate levels	47
Smallholder farmers’ livelihood vulnerability to climate change-induced hazards: agroecology-based comparative analysis in Northcentral Ethiopia (Woleka Sub-basin)	47
Optimising factors affecting solid phase extraction performances of molecular imprinted polymer as recent sample preparation technique	47
Improving Alzheimer's stage categorization with Convolutional Neural Network using transfer learning and different magnetic resonance imaging modalities	47
Techno-economic analysis of bio-briquette from cashew nut shell waste	47
Factors related to students' satisfaction with holding e-learning during the Covid-19 pandemic based on the dimensions of e-learning	47
Determinants of smallholder farmers' adoption of adaptation strategies to climate change in Eastern Tigray National Regional State of Ethiopia	46
Degree-based topological indices on anticancer drugs with QSPR analysis	46
Optimisation and production of alpha amylase from thermophilic Bacillus spp. and its application in food waste biodegradation	46
Solid waste quantification and characterization in university of Nigeria, Nsukka campus, and recommendations for sustainable management	46
Synthesis of magnetite/silica nanocomposites from natural sand to create a drug delivery vehicle	46
Speculative assessment, molecular composition, PDOS, topology exploration (ELF, LOL, RDG), ligand-protein interactions, on 5-bromo-3-nitropyridine-2-carbonitrile	46
Knowledge, attitude, and practice among healthcare workers towards COVID-19 outbreak in Nigeria	46
Features, barriers, and influencing factors of mobile learning in higher education: A systematic review	46
Psychological states of Bangladeshi people four months after the COVID-19 pandemic: An online survey	46
A cross-sectional study to determine factors affecting dental and medical students’ preference for virtual learning during the COVID-19 outbreak	46
Biodelignification of lignocellulose using ligninolytic enzymes from white-rot fungi	46
Assessment of contamination level, pollution risk and source apportionment of heavy metals in the Halda River water, Bangladesh	45
Nutritional and pharmacological importance of stinging nettle (Urtica dioica L.): A review	45
The impact of digital transformation on innovation performance - The mediating role of innovation factors	45
E-learning in higher education institutions during COVID-19 pandemic: current and future trends through bibliometric analysis	45
Gold-selenide quantum dots supported onto cesium ferrite nanocomposites for the efficient degradation of rhodamine B	45
Characterization of whey protein-based films incorporated with natamycin and nanoemulsion of α-tocopherol	45
Biochar production from palm oil mill residues and application of the biochar to adsorb carbon dioxide	45
Gamification and reputation: key determinants of e-commerce usage and repurchase intention	45
Adaptation and destabilization of interpersonal relationships in sport and music during the Covid-19 lockdown	45
Baby Boomers' use of Facebook and Instagram: uses and gratifications theory and contextual age indicators	45
Assessing the public perceptions of treated wastewater reuse: opportunities and implications for urban communities in developing countries	45
Assessment of bacteriological quality and physico-chemical parameters of domestic water sources in Samaru community, Zaria, Northwest Nigeria	45
Atlas of ACE2 gene expression reveals novel insights into transmission of SARS-CoV-2	45
Methods and variables in Electrical discharge machining of titanium alloy – A review	44
Liposome-polymer complex for drug delivery system and vaccine stabilization	44
Sustainable plastic waste management in a circular economy	44
Antidiabetic, anticholinergic and antioxidant activities of aerial parts of shaggy bindweed (Convulvulus betonicifolia Miller subsp.) – profiling of phenolic compounds by LC-HRMS	44
A review of threat modelling approaches for APT-style attacks	44
Occurrence and fate of pharmaceuticals, personal care products (PPCPs) and pesticides in African water systems: A need for timely intervention	44
EEG signal analysis using classification techniques: Logistic regression, artificial neural networks, support vector machines, and convolutional neural networks	44
Online learning for undergraduate health professional education during COVID-19: Jordanian medical students' attitudes and perceptions	44
Smallholder farmers’ perception of climate change and adoption of climate smart agriculture practices in Masaba South Sub-county, Kisii, Kenya	44
Virtual screening, molecular docking studies and DFT calculations of FDA approved compounds similar to the non-nucleoside reverse transcriptase inhibitor (NNRTI) efavirenz	44
Prospects of honey in fighting against COVID-19: pharmacological insights and therapeutic promises	44
Salt induced oxidative stress alters physiological, biochemical and metabolomic responses of green microalga Chlamydomonas reinhardtii	43
Exam cheating and academic integrity breaches during the COVID-19 pandemic: An analysis of internet search activity in Spain	43
Electrocoagulation treatment of high saline oily wastewater: evaluation and optimization	43
Herbicide bioremediation: from strains to bacterial communities	43
Fatty acid composition, bioactive phytochemicals, antioxidant properties and oxidative stability of edible fruit seed oil: effect of preharvest and processing factors	43
Impact of online education on fear of academic delay and psychological distress among university students following one year of COVID-19 outbreak in Bangladesh	43
Vibrational, electronic, spectroscopic properties, and NBO analysis of p-xylene, 3,6-difluoro-p-xylene, 3,6-dichloro-p-xylene and 3,6-dibromo-pxylene: DFT study	42