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phthalate ester

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https://www.readbyqxmd.com/read/30096548/insight-into-mechanism-of-aged-biochar-for-adsorption-of-paes-reciprocal-effects-of-ageing-and-coexisting-cd-2
#1
Fanqi Jing, Saran P Sohi, Yuyan Liu, Jiawei Chen
Biomass derived biochar is a stable carbon-rich product with potential for soil amendment. Introduced into the natural environment, biochar will naturally experience 'ageing' processes that are liable to change its physicochemical properties and the mobility of sorbed pollutants over the longer term. To elucidate the reciprocal effects of biochar ageing and heavy metal adsorption on the affinity of biochar for organic pollutants, we systematically assessed the adsorption of diethyl phthalate (DEP), representative of phthalic acid esters (PAEs), to fresh and aged biochars with and without coexistence of Cd2+ ...
August 1, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/30092517/how-human-activities-in-commercial-areas-contribute-to-phthalate-ester-pollution-in-street-dust-of-taiwan
#2
Sung-Tse Lee, Chitsan Lin, Chi Thanh Vu, Yi-Cyuan Chen, Kang-Shin Chen, Maria Ching Villanueva
Exposure to phthalate esters (PAEs) poses health risks to humans. Much research has been performed evaluating PAE levels in foodstuffs, river sediment and drinking water, but little attention has been paid to their presence in urban outdoor environments where human activities are highly intense. Here we evaluated PAE presence and distribution in street dust in Kaohsiung, the most industrialized city in Taiwan. Our results showed that PAEs were ubiquitous in fifty-two street-dust samples (levels of total PAEs 5...
July 29, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30091910/long-term-plastic-greenhouse-cultivation-changes-soil-microbial-community-structures-a-case-study
#3
Yang Song, Min Xu, Xiaona Li, Yongrong Bian, Fang Wang, Xinglun Yang, Chenggang Gu, Xin Jiang
Plastic greenhouse vegetable cultivation (PGVC) has been widely developed around the world and has resulted in great changes in soil properties and potential contamination by phthalate esters (PAEs). Using high-throughput sequencing, this study investigated the succession and potential factors impacting soil microbial community structures over 20 years of PGVC. The results showed that the pH of soils under PGVC were significantly lower, while the nutrient contents of soils were higher, relative to those of open field soil...
August 9, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/30088342/preparation-and-application-of-a-magnetic-plasticizer-as-a-molecularly-imprinted-polymer-adsorbing-material-for-the-determination-of-phthalic-acid-esters-in-aqueous-samples
#4
Shou-Lian Wei, Wan-Ting Liu, Xiao-Chen Huang, Jin-Kui Ma
A novel magnetic plasticizer molecularly imprinted polymers (MIPs) adsorbing material (MIP@mSiO2 -β-CD@Fe3 O4 ) was successfully synthesized for the determination of 6 phthalic acid esters in water, milk and wine samples. The molecularly imprinted polymers were prepared via precipitation polymerization and a surface molecular imprinting technique, using a cyclodextrin-modified magnetic meso-porous material (mSiO2 -β-CD@Fe3 O4 ) as magnetic supporter, dibutyl phthalate and butyl benzyl phthalate as the dual template molecules, methacrylic acid as the functional monomer, and ethyleneglycol dimethacrylate as the cross-linking agent...
August 8, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/30086194/in-vitro-inhibition-potential-of-mono-n-octyl-phthalate-on-mycobacterium-tuberculosis-h37ra-possibility-of-binding-to-mycobacterial-pknb-an-in-silico-approach
#5
Muniyan Rajiniraja, Akella Sivaramakrishna, Varatharajan Sabareesh, Gurunathan Jayaraman
Fatty acids, of specific chain lengths, have been shown to inhibit the growth of Mycobacterium tuberculosis. In the present study, specific synthetic aromatic derivatives of n-octyl esters were investigated for their property to inhibit the growth of Mycobacterium tuberculosis H37Ra. Agar well diffusion assay indicated that the crude synthetic derivatives obtained by the esterification of phthalic acid and n-octanol exhibited antimycobacterial activity. Further, the activity was authenticate with the miroplate alamar blue assay (MABA)...
August 7, 2018: Biotechnology and Applied Biochemistry
https://www.readbyqxmd.com/read/30084260/indoor-air-pollution-aggravates-asthma-in-chinese-children-and-induces-the-changes-in-serum-level-of-mir-155
#6
Qingbin Liu, Wei Wang, Wei Jing
Indoor air pollution is associated with childhood asthma but the molecular mechanism remains unclear. We aimed to explore the relationship between indoor air pollution and pediatric asthma, and the potential molecular mechanism. The serum level of miR-155 was measured by real-time qPCR in 180 Chinese children with asthma caused by air pollution (an asthma group). Meanwhile, 180 healthy subjects were selected as a control group. HCHO, NO2 , and particles (PM10 , PM2.5 , and PM1 ) were measured. Univariate and multivariate logistic regression were analyzed to assess the relationship between air pollutants and asthma risk...
August 7, 2018: International Journal of Environmental Health Research
https://www.readbyqxmd.com/read/30065937/characterization-and-genome-analysis-of-a-phthalate-esters-degrading-strain-sphingobium-yanoikuyae-shj
#7
Liang Feng, Hui Liu, Dandan Cheng, Xumei Mao, Yan Wang, Zhen Wu, Qiong Wu
A bacterium capable of utilizing dimethyl phthalate (DMP), diethyl phthalate (DEP), di- n -butyl phthalate (DBP), and diisobuthyl phthalate (DIBP) as the sole carbon and energy source was isolated from shallow aquifer sediments. The strain was identified as Sphingobium yanoikuyae SHJ based on morphological characteristics, 16S rDNA gene phylogeny, and whole genome average nucleotide identity (ANI). The degradation half-life of DBP with substrate concentration of 8.5 and 50.0 mg/L by strain SHJ was 99.7 and 101...
2018: BioMed Research International
https://www.readbyqxmd.com/read/30055282/phthalates-modulate-steroid-5-reductase-transcripts-in-the-western-clawed-frog-embryo
#8
Sonja Bissegger, Marco A Pineda Castro, Viviane Yargeau, Valerie S Langlois
Phthalates are used worldwide in the manufacturing of plastics, added to cosmetic products, personal care products, pharmaceuticals, medical devices, and paints; and are widely detected in soil, surface water, and organism tissues. Phthalate esters have been previously shown to interfere with the endocrine system in vertebrates. However, few studies have investigated the effects of phthalates on testosterone-converting enzymes that affect hormone levels and reproduction. In the present study, we exposed the Western clawed frog (Silurana tropicalis) to 0...
July 25, 2018: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/30052129/phthalate-esters-in-bottled-drinking-water-and-their-human-exposure-in-beijing-china
#9
Hui Li, Chunmei Li, Lihui An, Chao Deng, Hang Su, Lufang Wang, Zejun Jiang, Jie Zhou, Jing Wang, Chenghui Zhang, Fen Jin
Phthalate esters (PAEs) have attracted much attention because of their ubiquity and toxicity. However, previous studies mainly focused on the occurrence of PAEs controlled by the Environmental Protection Agency and neglected most uncontrolled PAEs. In this study, the occurrence of 21 PAEs, including six controlled and 15 uncontrolled PAEs, were investigated in polyethylene terephthalate (PET)-bottled drinking water samples purchased from markets in Beijing. Seventeen PAEs were detected in all samples, with dibutyl phthalate, diisobutyl phthalate and dimethyl phthalate as the predominant compounds...
July 27, 2018: Food Additives & Contaminants. Part B, Surveillance
https://www.readbyqxmd.com/read/30016867/self-assembling-hydrophilic-magnetic-covalent-organic-framework-nanospheres-as-a-novel-matrix-for-phthalate-ester-recognition
#10
Yinghua Yan, Yujie Lu, Baichun Wang, Yiqian Gao, Lingling Zhao, Hongze Liang, Dapeng Wu
The development of covalent organic framework (COF)-derived materials with additional functions and applications is highly desired. In this work, a unique COF-functionalized hydrophilic magnetic nanosphere (Fe3 O4 @PDA@TbBd) with Fe3 O4 as a magnetic core, polydopamine (PDA) as a hydrophilic middle layer, and TbBd as an outer COF shell was facilely prepared as a novel hydrophilic platform for efficient detection of phthalic acid esters (PAEs). The resultant Fe3 O4 @PDA@TbBd nanosphere displayed strong magnetic response, high surface area, and good hydrophilicity...
August 8, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30014940/stabilizing-mixed-fatty-acid-and-phthalate-ester-monolayer-on-artificial-seawater
#11
Siyang Li, Lin Du, Qingzhu Zhang, Wenxing Wang
Phthalate esters which are widely used as industrial chemicals have become widespread contaminants in the marine environment. However, little information is available on the interfacial behavior of phthalate esters in the seawater, where contaminants generally occur at elevated concentrations and have the potential to transfer into the atmosphere through wave breaking on sea surface. We used artificial seawater coated with fatty acids to simulate sea surface microlayer in a Langmuir trough. The interactions of saturated fatty acids (stearic acid (SA) and palmitic acid (PA)) with one of the most abundant phthalate esters (di-(2-ethylhexyl) phthalate (DEHP)), were investigated under artificial seawater and pure water conditions...
July 14, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/30009352/ortho-phthalic-acid-esters-suppress-the-phytopathogen-capability-for-biofilm-formation
#12
T N Shafikova, Y V Omelichkina, A G Enikeev, S V Boyarkina, D E Gvildis, A A Semenov
This is the first study demonstrating that ortho-phthalic acid esters, dibutylphthalate (DBP) and di-(2-ethylhexyl)-o-phthalate (DEHP), inhibit the ability to form biofilms of the biotrophic pathogen Clavibacter michiganensis ssp. sepedonicus and Pectobacterium carotovorum ssp. carotovorum necrotroph. Inhibition of biofilm formation depends on the DBP and DEHP concentrations.
May 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/30005344/distribution-and-contamination-status-of-phthalic-acid-esters-in-the-sediments-of-a-tropical-monsoonal-estuary-cochin-india
#13
A Ramzi, T R Gireeshkumar, K Habeeb Rahman, Mohan Manu, K K Balachandran, Jacob Chacko, N Chandramohanakumar
Phthalic acid esters (PAEs) are a group of endocrine-disrupting chemicals listed as priority pollutants by United States Environmental Protection Agency (USEPA, 2009). This study provides baseline information on seasonal distribution and contamination status of six phthalic acid esters (∑6 PAEs) in sediments of a tropical estuary (Cochin-India). In general, the sediments accumulated more PAEs during the post monsoon (mean 2325 ngg-1 ; between 1402 and 3121 ngg-1 ) and monsoon (mean 1372 ngg-1 ; between 331 and 4015 ngg-1 ) periods indicating land run off as the major transport pathway...
July 2, 2018: Chemosphere
https://www.readbyqxmd.com/read/30003399/computer-aided-design-of-magnetic-dummy-molecularly-imprinted-polymers-for-solid-phase-extraction-of-ten-phthalates-from-food-prior-to-their-determination-by-gc-ms-ms
#14
Chunxia Lu, Zonggui Tang, XiaoXu Gao, Xiaomei Ma, Changbin Liu
Magnetic dummy molecularly imprinted polymers (MDMIPs) were prepared by combining the surface imprinting technique with computer simulation for selective recognition of phthalate esters (PAEs). A computational study based on the density functional theory was performed to evaluate the template-monomer geometry and interaction energy in the prepolymerization mixture. The MDMIPs were characterized by transmission electron microscopy, scanning electron microscopy, vibrating sample magnetometry, X-ray diffraction, and Fourier transform infrared spectroscopy...
July 12, 2018: Mikrochimica Acta
https://www.readbyqxmd.com/read/29998667/-contamination-levels-and-ecological-risk-assessment-of-phthalate-esters-paes-in-the-aquatic-environment-of-key-areas-of-taihu-lake
#15
Bing-Qing Zhu, Zhan-Qi Gao, Guan-Jiu Hu, Jun-Fei Wang, Nan-Yang Yu, Si Wei
To better understand phthalate esters (PAEs) pollution in key areas of Taihu Lake, water and sediment samples were collected for content analysis. The concentrations of ∑PAEs in water samples from wet, dry, and normal seasons ranged 1.6-11.2 μg·L-1 (mean:3.68 μg·L-1 ), nd-6.21 μg·L-1 (mean:1.3 μg·L-1 ), and nd-1.72 μg·L-1 (mean:0.48 μg·L-1 ), respectively. No differences were found between upstream and downstream samples. DEHP was the predominant component in water samples, whereas DBP exceeded the national surface water environmental quality standards...
August 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
https://www.readbyqxmd.com/read/29987471/the-joint-toxicity-effect-of-five-antibiotics-and-dibutyl-phthalate-to-luminescent-bacteria-vibrio-fischeri
#16
Sheng Wei, Fenghe Wang, Yajun Chen, Tao Lan, Shengtian Zhang
Antibiotics and phthalate esters are two kinds of emerging pollutants and are ubiquitous in the aquatic ecosystem. To date, few studies analyzed the combined toxicity of the mixtures of antibiotics and phthalate esters, and their joint toxicity effect mode remains unknown. Here, we investigated the single and joint toxicity of dibutyl phthalate (DBP) and five antibiotics, namely, oxytetracycline hydrochloride (OTC), chlortetracycline hydrochloride (CTC), sulfamethazine (SMZ), sulfamerazine (SMR), and sulfadiazine (SD), to luminescent bacteria of Vibrio fischeri...
July 10, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29978319/transcriptomics-and-metabonomics-analyses-of-maternal-dehp-exposure-on-male-offspring
#17
Yunbo Zhang, Wanying Zhang, Xihang Fu, Fenfen Zhou, Haiyang Yu, Xiaolin Na
The objectives of this study were to evaluate the effect of maternal Di-2-ethylhexyl phthalate (DEHP) exposure on male offspring and to explore the mechanism of changes with the metabolic alterations and differential genes. Pregnant female Sprague-Dawley (SD) rats were intragastrically administered with 600 mg/kg body weight of DEHP or corn oil (CON) throughout pregnancy and lactation. The growth of male offspring was investigated until 14 weeks old, the indices of blood were detected, and mechanism was studied using metabonomics and transcriptomics...
July 6, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29973011/-association-between-the-internal-exposure-levels-of-phthalates-and-executive-function-of-preschool-children
#18
X X Cai, H Gao, S Q Yan, J Sheng, C L Gu, Z X Jin, J Qi, Y Y Xu, Q F Zhang, H Cao, F B Tao, J H Hao
Objective: To investigate the association between the internal exposure levels of phthalic acid esters (PAEs) and executive function (EF) of preschool children. Methods: Between October 2008 and October 2010, pregnant women who accepted pregnancy health care services in four municipal medical and health institutions in Ma'anshan city, Anhui Province, were recruited as study objects. A total of 5 084 pregnant women and 4 669 singleton live births were enrolled in this cohort. The follow-up study was conducted from April 2014 to April 2015...
March 6, 2018: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/29965671/-organic-distribution-characteristics-and-influence-on-drinking-water-quality-in-the-typical-water-sources-for-towns-in-the-southwest-hilly-area-of-china
#19
Qiong Wang, Nai-Wen Li, Lei Li, Long-Guo Li, Si Gou, Ling-Xiao Yang
This study analyzed the organic distribution characteristics of original and treated water and their impacts on drinking water quality using a conventional water treatment process in the typical water supply sources for towns in the southwest hilly area of China. The results showed that the water supply source in this area is micro-polluted water. Dissolved organics of low molecular weight accounted for the great majority of the organics, with the proportion ranging from 50% to 80%. There were 53 kinds and 14 classes of organics, including alkanes, esters, phenolic compounds, and benzenes, with the proportion from 80% to 90%...
January 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
https://www.readbyqxmd.com/read/29965480/-characterization-composition-of-soluble-microbial-products-in-an-aerobic-granular-sludge-system
#20
Dan Yang, Dong-Fang Liu, Li-Qiong Du, Wen-Li Huang
Using flocculent activated sludge as seed sludge to cultivate aerobic granular sludge in a SBR, the main objective of this study was focused on the accumulation, relative molecular mass distribution, and composition of soluble microbial products (SMP) in an aerobic granular sludge (AGS) system. SMP were predominant (71-85 mg·L-1 ) in the effluent of the AGS system. The formation of SMP was related to substrate utilization, biomass decay, and EPS hydrolysis. A relative molecular mass distribution analysis indicated that the majority of SMP, accounting for about 54...
March 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
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