4,228 results match your criteria Toxicity Toluene

A low-toxic, robust, and sensitive colorimetric sensor for the peroxide value of edible oils with CsPbBr3 NCs in ethyl acetate.

Talanta 2023 Sep 14;267:125209. Epub 2023 Sep 14.

College of Food Science and Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China. Electronic address:

Sensitively, accurately, and rapidly evaluating edible oils' peroxide value (PV) is significant for safeguarding food quality and safety. However, the conventional detection methods are challenging to meet the above demands due to their complex operation, poor reproducibility, and professional personnel. The colorimetric method is an emerging technique to rapidly and on-site determine the PV of edible oils. Read More

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September 2023

Can some food/medicinal plants directly affect porcine ovarian granulosa cells and mitigate the toxic effect of toluene?

Reprod Domest Anim 2023 Sep 21. Epub 2023 Sep 21.

College of Science, King Saud University, Riyadh, Saudi Arabia.

The action of buckwheat, rooibos and vitex on healthy female reproductive systems, as well as their ability to mitigate the reproductive toxicity of environmental contaminant toluene have not yet been examined. We analysed the influence of toluene (0, 10, 100 or 1000 ng/mL) with and without these plant extracts (10 μg/mL) on cultured porcine ovarian granulosa cells. Cell viability, proliferation (PCNA accumulation), apoptosis (accumulation of bax) and release of progesterone (P) and oestradiol (E) were measured. Read More

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September 2023

Volatile organic compounds emitted by conventional and "green" cleaning products in the U.S. market.

Chemosphere 2023 Nov 12;341:139570. Epub 2023 Sep 12.

Environmental Working Group, 1250 I St NW Suite 1000, Washington DC, 20005, USA.

Exposure to cleaning products has been associated with harm to the respiratory system, neurotoxicity, harm to the reproductive system, and elevated risk of cancer, with greatest adverse impacts for workers exposed in an occupational setting. Social and consumer interest in cleaning products that are safer for health created a market category of "green" products defined here as products advertised as healthier, non-toxic, or free from harmful chemicals as well as products with a third-party certification for safety or environmental features. In the present study we examined the air quality impacts of cleaning products and air fresheners, measuring the number, concentrations, and emission factors of volatile organic compounds (VOCs) in an air chamber following product application. Read More

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November 2023

The response of microbial compositions and functions to chronic single and multiple antibiotic exposure by batch experiment.

Environ Int 2023 Sep 1;179:108181. Epub 2023 Sep 1.

Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.

Understanding the response of the microbial community to external disturbances such as micropollutants is vital for ecological risk evaluation. In this study, the effect of chronic antibiotic exposure on community compositions and functions was investigated by two batch experiments. The first experiment investigated the effect of chronic sulfamethoxazole (SMX) exposure, while the second investigated the combined effect of dissolved organic matter (DOM) sources and multi-antibiotic exposure. Read More

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September 2023

Synthesis and application of quaternary amine-functionalized core-shell-shell magnetic polymers for determination of metabolites of benzene, toluene and xylene in human urine samples and study of exposure assessment.

J Chromatogr A 2023 Oct 21;1708:464320. Epub 2023 Aug 21.

Ningbo Kangning Hospital, Ningbo, Zhejiang 315201, China.

As production processes have evolved, airborne concentrations of benzene, toluene and xylene in many workplaces are already well below the occupational exposure limits. However, studies have shown that low levels of exposure to benzene, toluene and xylene can still cause health effects in people exposed occupationally. However, there is no literature on health risk assessment of internal exposure. Read More

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October 2023

Modified hydrophobic and oleophilic polyurethane sponge for oil absorption with MIL-53.

Environ Res 2023 Aug 30;237(Pt 2):116982. Epub 2023 Aug 30.

Department of Chemistry, Doon University, Dehradun-248001, India. Electronic address:

A hydrophobic composite sponge (HPCS) is developed for the first time using the dip coating and drying method in an effort to remove organic contaminants like toluene and various oils from water. We employed a polyurethane (PU) sponge, which is reasonably priced, easily accessible, high mechanical strength and a suitable porous substrate on which the hydrophobic composite of MIL-53(Al) along with PDMS was anchored. A crystalline metal organic framework (MOF), MIL-53(Al), with adjustable porosity, functionality, and hydrophobicity is used for oil absorption. Read More

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Green and facile preparation of covalent organic frameworks based on reaction medium for advanced applications.

Chemistry 2023 Aug 28:e202301837. Epub 2023 Aug 28.

Isfahan University of Technology, Chemistry, Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, 84156-83111, Isfahan, IRAN (ISLAMIC REPUBLIC OF).

Covalent organic frameworks (COFs), as a new class of crystalline, well-ordered, and porous materials with intermittent constructions, are formed via organic structural parts connected through covalent bonds. These materials have been employed in several fields comprising pollutant adsorption and separation, catalysis, electrical conductivity, gas storage, etc. The preparation of COFs is mainly applied in tubes with high temperatures and degassing treatment. Read More

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Whole genome analyses of toxicants tolerance genes of Apis mellifera gut-derived Enterococcus faecium strains.

BMC Genomics 2023 Aug 24;24(1):479. Epub 2023 Aug 24.

Department of Botany and Microbiology, Faculty of Science, Alexandria University, Moharam Bek 21511, Alexandria, Egypt.

Background: Because of its social nature, the honeybee is regularly exposed to environmental toxicants such as heavy metals and xenobiotics. These toxicants are known to exert strong selective pressure on the gut microbiome's structure and diversity. For example, resistant microbial members are more likely to dominate in maintaining a stable microbiome, which is critical for bee health. Read More

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Risk assessment of sediment PAH, BTEX, and emerging contaminants in Chanomi Creek Niger Delta, Nigeria.

Environ Monit Assess 2023 Aug 24;195(9):1080. Epub 2023 Aug 24.

Department of Marine Environment and Pollution Control, Faculty of Marine Environmental Management, Nigeria Maritime University, Okerenkoko, Delta State, Nigeria.

This study assessed the levels of polycyclic aromatic hydrocarbons (PAHs), benzene, toluene, ethylbenzene, and xylene (BTEX), and emerging contaminants in Chanomi Creek. Sediment samples were collected between March 2019 and July 2020 to evaluate the concentrations of PAH, BTEX, and emerging contaminants using GC-MS and GC-FID with Headspace extraction. Results indicated mean PAH concentrations were 22. Read More

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Catalytic electrodes' characterization study serving polluted water treatment: environmental healthcare and ecological risk assessment.

J Environ Sci Health B 2023 21;58(9):594-602. Epub 2023 Aug 21.

Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran.

Pesticide residues in the environment have irreparable effects on human health and other organisms. Hence, it is necessary to treat and degrade them from polluted water. In the current work, the electrochemical removal of the fenitrothion (FT), trifluralin (TF), and chlorothalonil (CT) pesticides were performed by catalytic electrode. Read More

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Near-IR-Regulated Composite Hydrogel with Real-Time Infection Monitoring and a Combined Antibacterial Effect for Efficient Wound Management.

ACS Appl Mater Interfaces 2023 Aug 16;15(34):40255-40266. Epub 2023 Aug 16.

Key Laboratory of Textile Fiber and Products (Wuhan Textile University), Ministry of Education, Wuhan Textile University, Wuhan 430200, China.

Chronic wounds induced by bacterial infection have seriously affected the health of people in the world. So, it is meaningful to develop a novel strategy with real-time infection monitoring and excellent antibacterial performance for enhancing wound management. Herein, we constructed a composite hydrogel by loading the pH indicator bromothymol blue (BTB) and gold nanocages containing 2,2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (Au NCs@AIPH) into a polyacrylamide--poly(acrylic anhydride-modified oxidized sodium alginate) (PAM--PAOSA) hydrogel. Read More

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Synergistic effects of Mg doping on TiOfor improved toxic gas sensing performance at room temperature.

J Phys Condens Matter 2023 Sep 6;35(48). Epub 2023 Sep 6.

Department of Physics, Sreenidhi University, Ghatkesar, Hyderabad, Telangana 501301, India.

The gas sensing characteristics of magnesium (Mg)-doped titanium dioxide (TiO) films were investigated using a spray pyrolysis method. TiOThin films with varying Mg doping concentrations (0, 2.5, and 5 weight percentages) were deposited and tested for their gas detection ability to organic compounds such as ethanol, butanol, toluene, xylene, and formaldehyde at room temperature. Read More

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September 2023

Air Pollutant Patterns and Human Health Risk following the East Palestine, Ohio, Train Derailment.

Environ Sci Technol Lett 2023 Aug 12;10(8):680-685. Epub 2023 Jul 12.

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.

On February 3, 2023, a train carrying numerous hazardous chemicals derailed in East Palestine, OH, spurring temporary evacuation of residents and a controlled burn of some of the hazardous cargo. Residents reported health symptoms, including headaches and respiratory, skin, and eye irritation. Initial data from U. Read More

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Development of Simultaneous Determination Method of Pesticide High Toxic Metabolite 3,4-Dichloroaniline and 3,5 Dichloroaniline in Chives Using HPLC-MS/MS.

Foods 2023 Jul 28;12(15). Epub 2023 Jul 28.

Institute of Crop Protection, Guizhou University, Guiyang 550025, China.

3,4-dichloroaniline (3,4-DCA) and 3,5-dichloroaniline (3,5-DCA) are, respectively, the primary metabolites deriving from the breakdown of phenylurea herbicides and dicarboximide fungicides in both soils and plants, whose residues in vegetable products have a heightened concern considering their higher health risks to humans and greater toxicity than the parent compounds in the environment. In this study, a sensitive high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method was developed for the simultaneous determination of 3,4-DCA and 3,5-DCA residues in chive products based on the optimization of HPLC-MS/MS chromatographic and mass-spectrometric conditions using the standard substances and the modified QuEChERS preparation technique. The preparation efficiency of 3,4-DCA and 3,5-DCA from chive samples showed that acetonitrile was the best extractant. Read More

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Effects of exposure to the explosive and environmental pollutant 2,4,6-trinitrotoluene on ovarian follicle development in rats.

Environ Sci Pollut Res Int 2023 Sep 12;30(42):96412-96423. Epub 2023 Aug 12.

Fujian Province Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou, Fujian, China.

Although 2,4,6-trinitrotoluene (TNT) is a dangerous carcinogen in environmental pollution, information on the reproductive effects of TNT explosive contamination is limited. To explore the possible ovarian effects, TNT explosive-exposed rat models were established, and Wistar female rats were exposed to low and high TNT (40 g and 80 g, air and internal) explosives. After a month of exposure, the estrous cycle, ovarian histopathology, and follicle counting were conducted. Read More

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September 2023

Novel BTEX-degrading strains from subsurface soil: Isolation, identification and growth evaluation.

Environ Pollut 2023 Oct 7;335:122303. Epub 2023 Aug 7.

Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, Ontario, M3J 1P3, Canada. Electronic address:

Monoaromatic hydrocarbons such as benzene, toluene, ethylbenzene, and o, m, and p-xylenes (BTEX) are high-risk pollutants because of their mutagenic and carcinogenic nature. These pollutants are found with elevated levels in groundwater and soil in Canada at several contaminated sites. The intrinsic microbes present in the subsurface have the potential to degrade pollutants by their metabolic pathways and convert them to non-toxic products. Read More

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October 2023

Single-chemical and mixture effects of multiple volatile organic compounds exposure on liver injury and risk of non-alcoholic fatty liver disease in a representative general adult population.

Chemosphere 2023 Oct 6;339:139753. Epub 2023 Aug 6.

Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China. Electronic address:

Evidence on liver injury and non-alcoholic fatty liver disease (NAFLD) from volatile organic compounds (VOCs) exposure is insufficient. A cross-sectional study including 3011 US adults from the National Health and Nutrition Examination Survey was conducted to explore the associations of urinary exposure biomarkers (EBs) for 13 VOCs (toluene, xylene, ethylbenzene, styrene, acrylamide, N,N-dimethylformamide, acrolein, crotonaldehyde, 1,3-butadiene, acrylonitrile, cyanide, propylene oxide, and 1-bromopropane) with liver injury biomarkers and the risk of NAFLD by performing single-chemical (survey weight regression) and mixture (Bayesian kernel machine regression [BKMR] and weighted quantile sum [WQS]) analyses. We found significant positive associations of EBs for toluene and 1-bromopropane with alanine aminotransferase (ALT), EBs for toluene, crotonaldehyde, and 1,3-butadiene with asparate aminotransferase (AST), EBs for 1,3-butadiene and cyanide with alkaline phosphatase (ALP), EBs for xylene and cyanide with hepamet fibrosis score (HFS), EBs for the total 13 VOCs (except propylene oxide) with United States fatty liver index (USFLI), and EBs for xylene, N,N-dimethylformamide, acrolein, crotonaldehyde, and acrylonitrile with NALFD; and significant inverse associations of EBs for ethylbenzene, styrene, acrylamide, acrolein, crotonaldehyde, 1,3-butadiene, acrylonitrile, cyanide, and propylene oxide with total bilirubin, EBs for ethylbenzene, styrene, acrylamide, acrolein, 1,3-butadiene, acrylonitrile, and cyanide with albumin (ALB), EBs for ethylbenzene, styrene, acrylamide, N,N-dimethylformamide, acrolein, crotonaldehyde, 1,3-butadiene, acrylonitrile, cyanide, and propylene oxide with total protein (TP), and EB for 1-bromopropane with AST/ALT (all P-FDR<0. Read More

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October 2023

Fine-tuning the cytotoxicity of ruthenium(II) arene compounds to enhance selectivity against breast cancers.

Dalton Trans 2023 Aug 22;52(33):11679-11690. Epub 2023 Aug 22.

LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, no 228, 4050-313 Porto, Portugal.

Ruthenium-based complexes have been suggested as promising anticancer drugs exhibiting reduced general toxicity compared to platinum-based drugs. In particular, Ru(η-arene)(PTA)Cl (PTA = 1,3,5-triaza-7-phosphaadamantane), or RAPTA, complexes have demonstrated efficacy against breast cancer by suppressing metastasis, tumorigenicity, and inhibiting the replication of the human tumor suppressor gene BRCA1. However, RAPTA compounds have limited cytotoxicity, and therefore comparatively high doses are required. Read More

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The alkoxy radical polymerization of -vinylpyrrolidone in organic solvents: theoretical insight into the mechanism and kinetics.

RSC Adv 2023 Aug 4;13(34):23402-23408. Epub 2023 Aug 4.

Department of Biochemistry and Chemistry, La Trobe University Victoria 3086 Australia.

Poly(-vinylpyrrolidone) (PVP) is a polymer with many applications in cosmetic, pharmaceutical, and biomedical formulations due to its minimal toxicity. PVP can be synthesized through radical polymerization in organic solvents; this well-known industrial process is thoroughly characterized experimentally, however, quantum chemical modeling of the process is scarce: the mechanism and kinetics have not been thoroughly investigated yet. In this work, the mechanism and kinetics of the alkoxy radical polymerization of -vinylpyrrolidone in organic solvents, namely isopropanol (IP) and toluene (TL), were successfully modeled by computational chemistry. Read More

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Synthesis of Layered Lead-Free Perovskite Nanocrystals with Precise Size and Shape Control and Their Photocatalytic Activity.

J Am Chem Soc 2023 Aug 31;145(31):17337-17350. Epub 2023 Jul 31.

Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, Melbourne, Victoria 3001, Australia.

Halide perovskites have attracted enormous attention due to their potential applications in optoelectronics and photocatalysis. However, concerns over their instability, toxicity, and unsatisfactory efficiency have necessitated the development of lead-free all-inorganic halide perovskites. A major challenge in designing efficient halide perovskites for practical applications is the lack of effective methods for producing nanocrystals with precise size and shape control. Read More

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Melatonin Preserves Fluidity in Cell and Mitochondrial Membranes against Hepatic Ischemia-Reperfusion.

Biomedicines 2023 Jul 8;11(7). Epub 2023 Jul 8.

Department of Pharmacology, Physiology and Legal and Forensic Medicine, Faculty of Medicine, University of Zaragoza, 50009 Zaragoza, Spain.

We evaluated the in vivo effects of melatonin treatment on oxidative damage in the liver in an experimental model of ischemia-reperfusion. A total of 37 male Sprague-Dawley rats were randomly divided into four groups: control, ischemia, ischemia + reperfusion, and ischemia + reperfusion + melatonin. Hepatic ischemia was maintained for 20 min, and the clamp was removed to initiate vascular reperfusion for 30 min. Read More

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The Migration Mechanism of BTEX in Single- and Double-Lithology Soil Columns under Groundwater Table Fluctuation.

Toxics 2023 Jul 20;11(7). Epub 2023 Jul 20.

School of Chemical and Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China.

The migration of light non-aqueous phase liquids (LNAPLs) trapped in porous media is a complex phenomenon. Groundwater table fluctuation can not only affect contaminant migration but also redox conditions, bacterial communities, and contaminant degradation. Understanding LNAPLs' (e. Read More

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Designing novel perlite-FeO@SiO@8-HQ-5-SA as a promising magnetic nanoadsorbent for competitive adsorption of multicomponent VOCs.

Chemosphere 2023 Oct 24;338:139636. Epub 2023 Jul 24.

Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey; Department of Chemical Engineering, Faculty of Engineering, Siirt University, 56100, Siirt, Turkey. Electronic address:

Volatile organic compounds (VOCs), which emerge as multicomponent pollutants through many industrial processes, pose a serious threat to human health and the eco-environment due to their volatility, toxicity and dispersion. Hence, the study of competitive adsorption of multicomponent VOCs is of practical and scientific importance. Herein, the perlite-supported FeO@SiO@8-hydroxyquinoline-5-sulfonic acid (perlite-FeO@SiO@8-HQ-5-SA) was designed as a novel magnetic nanoadsorbent by a simple strategy and employed for the competitive adsorption of multicomponent toluene, ethylbenzene and xylene in the vapor-phase targeted as VOCs. Read More

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October 2023

Green analytical chemistry-driven response surface modeling to stability-indicating chromatographic method for estimation of cilnidipine and application of high-performance thin-layer chromatography-mass spectrometry for characterization of degradation products.

J Sep Sci 2023 Jul 21:e2300332. Epub 2023 Jul 21.

Department of Quality Assurance, Maliba Pharmacy College, Surat, Gujarat, India.

Cilnidipine is a calcium channel blocker that is used to treat cardiac diseases such as angina and high blood pressure. Several column and planar chromatographic methods for estimating cilnidipine in pharmaceutical dosage forms have been documented. However, these method developments have been carried out employing organic solvents such as acetonitrile, methanol, toluene, chloroform, and others as mobile phase components or as sample pretreatment diluents. Read More

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Quantification of polycyclic aromatic sulfur heterocycles in fine airborne urban particles (PM) after multivariate optimization of a green procedure.

Sci Total Environ 2023 Jul 13;898:165465. Epub 2023 Jul 13.

Centro Interdisciplinar de Energia e Ambiente-CIEnAm, Universidade Federal da Bahia, 40170-115, Salvador, BA, Brazil; Universidade Federal da Bahia, Instituto de Química, Programa de Pós-Graduação em Química, 40170-115, Salvador, BA, Brazil; Instituto Nacional de Ciência e Tecnologia em Energia e Ambiente-INCT E&A, Universidade Federal da Bahia, 40170-115, Salvador, BA, Brazil. Electronic address:

Polycyclic aromatic sulfur heterocycles (PASHs), such as benzothiophenes (BT), dibenzothiophenes (DBT) and benzonapthothiophenes (BNT), can be emitted from vehicular traffic and deposited in fine particles matter (PM). The presence of these compounds in PM is an environmental concern due to air pollution and its toxic properties. In this study, a green microscale solid-liquid extraction method was developed to determine twenty-three PASHs in PM. Read More

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Diverse hydrocarbon degradation genes, heavy metal resistome, and microbiome of a fluorene-enriched animal-charcoal polluted soil.

Folia Microbiol (Praha) 2023 Jul 14. Epub 2023 Jul 14.

Department of Biological Sciences, Microbiology unit, Elizade University, Ilara-Mokin, Ondo State, Nigeria.

Environmental compartments polluted with animal charcoal from the skin and hide cottage industries are rich in toxic heavy metals and diverse hydrocarbon classes, some of which are carcinogenic, mutagenic, and genotoxic, and thus require a bio-based eco-benign decommission strategies. A shotgun metagenomic approach was used to decipher the microbiome, hydrocarbon degradation genes, and heavy metal resistome of a microbial consortium (FN8) from an animal-charcoal polluted site enriched with fluorene. Structurally, the FN8 microbial consortium consists of 26 phyla, 53 classes, 119 orders, 245 families, 620 genera, and 1021 species. Read More

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Association between ambient BTEX mixture and neurological hospitalizations: A multicity time-series study in Taiwan.

Ecotoxicol Environ Saf 2023 Sep 11;263:115239. Epub 2023 Jul 11.

JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region of China; Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Hong Kong Special Administrative Region of China. Electronic address:

Background: Benzene, toluene, ethylbenzene, and xylenes, collectively known as BTEX, are hazardous chemical mixtures, and their neurological health effects have not been thoroughly evaluated. We examined the association between BTEX exposure and neurological hospital admissions.

Methods: This was a multicity time-series study conducted in five major Taiwanese cities. Read More

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September 2023

Global Profiling of Urinary Mercapturic Acids Using Integrated Library-Guided Analysis.

Environ Sci Technol 2023 Jul 11;57(29):10563-10573. Epub 2023 Jul 11.

American Heart Association-Tobacco Regulation and Addiction Center, University of Louisville, Louisville, Kentucky 40202, United States.

Urinary mercapturic acids (MAs) are often used as biomarkers for monitoring human exposures to occupational and environmental xenobiotics. In this study, we developed an integrated library-guided analysis workflow using ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry. This method includes expanded assignment criteria and a curated library of 220 MAs and addresses the shortcomings of previous untargeted approaches. Read More

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Post processing of low cost Aligners fabricated by additive manufacturing process to enhance the surface quality and functionality.

J Mech Behav Biomed Mater 2023 Aug 29;144:106003. Epub 2023 Jun 29.

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, India. Electronic address:

Additive Manufacturing (AM) processes have ample advantages compared to traditional manufacturing processes, including mass customization, material efficiency, bioprinting, and fabrication of complex geometries with reduced lead time. Despite such benefits, it suffers most from staircase effects that deteriorate the fabricated part's surface quality. Nowadays, additively manufactured aligners are suitable for treating malocclusion and temporomandibular defects of teeth. Read More

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