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phthalate ester

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https://www.readbyqxmd.com/read/30324366/a-theoretical-method-for-the-high-sensitivity-fluorescence-detection-of-paes-through-double-substitution-modification
#1
Youli Qiu, Yu Li
A highly sensitive method for the detection of phthalate acid ester (PAE) derivatives by fluorescence spectroscopy based on a double-substitution modification is reported. The fluorescence intensities of 18 PAE derivatives and the template PAEs after docking with the protein bovine serum albumin (BSA) are compared; the fluorescence intensities of the PAE derivatives increase significantly (28.20 to 110.00 times) with high sensitivities, but the functionalities (stability and insulation) are not affected. The persistence, mobility, and toxicity of the PAE derivatives are reduced by varying degrees, and their amounts of bioaccumulation are not significantly changed, indicating that the derivatives are more environmentally friendly...
October 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30292159/comparison-of-greenhouse-and-open-field-cultivations-across-china-soil-characteristics-contamination-and-microbial-diversity
#2
Jianteng Sun, Lili Pan, Zhiheng Li, Qingtao Zeng, Lingwen Wang, Lizhong Zhu
A national scale survey was conducted to determine an array of inorganic and organic contaminants in agricultural soils from two cultivation modes (greenhouse vs. open field) in 20 provinces across China. The investigated contaminants include organochlorine pesticides (OCPs), phthalate esters (PAEs), polycyclic aromatic hydrocarbons (PAHs), lead (Pb), zinc (Zn), copper (Cu) and cadmium (Cd). The large amounts of agrochemicals used and special cultivation mode in greenhouse caused substantial soil pollution and deterioration of soil quality...
September 29, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/30292051/interactions-between-microplastics-and-phthalate-esters-as-affected-by-microplastics-characteristics-and-solution-chemistry
#3
Fei-Fei Liu, Guang-Zhou Liu, Zhi-Lin Zhu, Su-Chun Wang, Fei-Fei Zhao
Microplastics have become a major concern in recent years as they can be recognized as the transport vectors for pollutants in environment. In this study, the sorption behavior of two phthalate esters (PAEs), including diethyl phthalate (DEP) and dibutyl phthalate (DBP), onto three types of microplastics (PVC: polyvinyl chloride, PE: polyethylene, and PS: polystyrene) was investigated. The sorption isotherms of both DEP and DBP on microplastics were highly linear, suggesting that the partition was the main sorption mechanism...
October 1, 2018: Chemosphere
https://www.readbyqxmd.com/read/30282852/skin-sensitization-to-fluorescein-isothiocyanate-is-enhanced-by-butyl-paraben-in-a-mouse-model
#4
Takeshi Matsuoka, Yukina Endo, Kohta Kurohane, Yasuyuki Imai
Contact hypersensitivity (CHS) to preservatives is receiving increased attention. Parabens are widely used in foods, pharmaceutics and cosmetics as preservatives. The skin sensitizing activity of parabens remains controversial but a few investigations have been made as to whether parabens could facilitate sensitization to other chemicals. We have shown that di-n-butyl phthalate (DBP), a phthalate ester, has an adjuvant effect in a fluorescein isothiocyanate (FITC)-induced CHS mouse model. We have also demonstrated that DBP activates transient receptor potential ankyrin 1 (TRPA1) cation channels expressed on sensory neurons...
October 2, 2018: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/30281400/a-review-of-dietary-exposure-and-toxicological-information-on-epoxidised-soybean-oil-esbo-in-food-contact-applications
#5
Omari J Bandele, LaShonda T Cureton, Allan B Bailey, Adejoke Ogungbesan
Plasticisers have a long history of use in the industrial manufacture and processing of polymers for the purpose of increasing the flexibility and strength of the material. Approximately, 80-90% of the plasticiser market is devoted to the production of PVC, a highly versatile thermoplastic used to produce both rigid and flexible articles. Many types of plasticisers, including ortho-phthalate esters (OPE), can be added to PVC to impart flexibility. Recently, alternatives to OPEs, such as epoxy esters and aliphatic adipates, are becoming more prevalent for use in PVC-based food-contact articles...
October 3, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/30251518/-determination-of-nine-phthalate-ester-metabolites-in-human-urine-using-ultra-high-performance-liquid-chromatography-tandem-triple-quadrupole-mass-spectrometry
#6
Xu Zhang, Tian Qiu, Hui Fu, Yanwei Yang, Feng Zhao, Shaobin Lin, Xiaojian Hu
A method was developed to determine trace concentrations of phthalate ester (PAE) metabolites in human urine by using ultra high performance liquid chromatography-triple quadrupole mass spectrometry. Aliquots (2 mL) of human urine samples were purified using strong anion-exchange solid-phase extraction after enzymatic deconjugation by glucuronidase for 2 h. The separation was performed on a Waters ACQUITY UPLC BEH Phenyl column (100 mm×2.1 mm, 1.7 μ m) with gradient elution by 0.1% (v/v) acetic acid in acetonitrile and 0...
September 8, 2018: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/30251503/-determination-of-16-phthalate-acid-esters-in-infant-formula-by-gas-chromatography-tandem-mass-spectrometry
#7
Bingbing Xu, Xiaomin Li, Qinghe Zhang, Weihuang Zhu
A method was established for the determination of 16 phthalate acid esters (PAEs) in infant formula by gas chromatography-tandem mass spectrometry (GC-MS/MS). PAEs in infant formula samples were homogenized by deionized water, extracted with acetonitrile, and purified by a solid-phase extraction (SPE) method using primary secondary amine (PSA) sorbents. The separation was performed on a DB-5 MS UI (30 m×0.25 mm×0.25 μm) capillary column. Effects of different elution solvents on alumina/PSA and PSA SPE columns were investigated...
August 8, 2018: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/30248862/an-overview-of-phthalate-acid-ester-pollution-in-china-over-the-last-decade-environmental-occurrence-and-human-exposure
#8
REVIEW
Dawen Gao, Zhe Li, He Wang, Hong Liang
The toxicity and bioaccumulation potential of phthalate acid esters (PAEs) make their impact on the environment a matter of considerable concern. Due to China's recent economic development and population growth, it has become one of the largest manufacturers and consumers of PAEs, with an associated contamination threat to several environmental compartments. The aim of this overview is to present a systematic account of PAE occurrence in various environmental media in China in the last decade, including the air, surface water, sediments, soil, sewage, and sludge; human exposure to PAEs is also evaluated...
December 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30244753/occupational-exposure-assessment-of-phthalate-esters-in-indoor-and-outdoor-microenvironments
#9
Meng Xia, Xingzi Ouyang, Xueqing Wang, Xueyou Shen, Yu Zhan
Phthalate esters (PAEs) are widely used as plasticizers in consumer products. PAEs are a group of environmental hormone which disrupts human and animals' endocrine systems. Different occupational groups are exposed to various levels of PAEs. In the present study, four typical occupational groups were chosen, including doctors, college teachers, college students, and drivers who worked in public traffic system. In order to understand the exposure levels to PAEs via inhalation, air samples were collected from multiple microenvironments including indoor and outdoor in Hangzhou to measure the gas and particle concentrations of six PAEs, together with time spent in different microenvironments of these four groups...
October 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/30243731/butyl-benzyl-phthalate-promotes-prostate-cancer-cell-proliferation-through-mir-34a-downregulation
#10
Mingming Zhu, Jieshu Wu, Xiao Ma, Cong Huang, Rui Wu, Weiwei Zhu, Xiaoting Li, Zhaofeng Liang, Feifei Deng, Jianyun Zhu, Wei Xie, Xue Yang, Ye Jiang, Shijia Wang, Shanshan Geng, Chunfeng Xie, Caiyun Zhong
Prostate cancer is the most common malignancy in men. Phthalate esters are a class of environmental endocrine disruptors and were reported to be cancer promoting agents, however the potential role of phthalate esters in prostate cancer has been rarely reported. Mounting evidence has shown that miR-34a is a master tumor suppressor miRNA in cancer. The aim of this study was to investigate the role of butyl benzyl phthalate (BBP), one of the typical phthalate esters, in cell proliferation of prostate cancer cells...
September 19, 2018: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/30232512/effect-of-rotary-evaporator-water-bath-temperature-on-recovery-rate-of-phthalate-esters
#11
Long Wang, Ying Liu, Fan Pu, Wen Zhang, Zhongmu Zhou
To clarify the influence of water bath temperature on the decompression and concentration efficiency of a rotary evaporator, accurate control of the water bath temperature is required. Therefore, the water bath temperature control system of a rotary evaporator was studied using the recovery rate of phthalate esters (PAEs) as the indicator. The results showed that when the temperature of the rotary evaporator was set at 40°C, the actual temperature range of the concentrated liquid would change from 26-41 to 39-41°C...
September 19, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/30231475/excellent-degradation-performance-of-a-versatile-phthalic-acid-esters-degrading-bacterium-and-catalytic-mechanism-of-monoalkyl-phthalate-hydrolase
#12
Shuanghu Fan, Junhuan Wang, Yanchun Yan, Jiayi Wang, Yang Jia
Despites lots of characterized microorganisms that are capable of degrading phthalic acid esters (PAEs), there are few isolated strains with high activity towards PAEs under a broad range of environmental conditions. In this study, Gordonia sp. YC-JH1 had advantages over its counterparts in terms of di(2-ethylhexyl) phthalate (DEHP) degradation performance. It possessed an excellent degradation ability in the range of 20⁻50 °C, pH 5.0⁻12.0, or 0⁻8% NaCl with the optimal degradation condition 40 °C and pH 10...
September 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30196112/synthesis-and-application-of-sugarcane-bagasse-cellulose-mixed-esters-part-i-removal-of-co-2-and-ni-2-from-single-spiked-aqueous-solutions-in-batch-mode-using-sugarcane-bagasse-cellulose-succinate-phthalate
#13
Megg Madonyk Cota Elias, Gabriel Max Dias Ferreira, Francine Tatiane Rezende de Almeida, Nathália Cristina Martins Rosa, Isabela Almeida Silva, Jefferson Gonçalves Filgueiras, Eduardo Ribeiro de Azevedo, Luis Henrique Mendes da Silva, Tânia Márcia Sacramento Melo, Laurent Frédéric Gil, Leandro Vinícius Alves Gurgel
Sugarcane bagasse cellulose mixed ester succinate phthalate (SBSPh) was synthesized by a novel one-pot reaction method. The effects of temperature, time and mole fraction of succinic anhydride (χSA ) on the responses weight gain (wg), number of carboxylic acid groups (nT,COOH ), and adsorption capacity (q) of Co2+ and Ni2+ were evaluated by a 23 experimental design. The chemical structure of the material was elucidated by Fourier transform infrared, 13 C Multiple Cross-Polarization solid-state NMR spectroscopy and 1 H NMR relaxometry...
August 30, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/30193166/transcriptomic-responses-of-nile-tilapia-oreochromis-niloticus-liver-to-environmental-concentration-of-di-2-ethylhexyl-phthalate
#14
Linbao Zhang, Ying Hu, Wei Sun, Si Chen, Xiaoping Jia, Wengui Cai
Di-(2-ethylhexyl) phthalate (DEHP) is currently the most frequently detected phthalic acid esters (PAEs) compounds and can induce diverse toxicities on aquatic organisms. To understand the molecular responses of fish to DEHP, we performed transcriptomic profiles in liver of tilapia (Oreochromis niloticus) which were exposed to environmental concentration of DEHP. A total of 30.10 Mb and 30.16 Mb clean reads were retrieved from the control and DEHP treated libraries, respectively. De-novo assembly of all the clean reads obtained 58,585 unigenes...
September 4, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30189576/estimating-population-exposure-to-phthalate-esters-in-major-chinese-cities-through-wastewater-based-epidemiology
#15
Peng Du, Zilei Zhou, Hongmei Huang, Sheng Han, Zeqiong Xu, Ya Bai, Xiqing Li
Phthalate esters (PAEs) are widely used in consumer and industrial products and may thus pose significant health risks. Urine analysis, which has usually been applied to assess the health risks of PAEs, has the drawback of small sample sizes and insufficient representativeness. Wastewater-based epidemiology (WBE) collects wastewater samples containing urine from the entire community and thus is more representative than urine samples. In this work, exposure levels and health risks of PAEs were estimated on a national scale for the first time through the WBE approach...
December 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30138801/uv-b-radiation-induces-dehp-degradation-and-their-combined-toxicological-effects-on-scenedesmus-acuminatus
#16
Chao Zhang, Mu Xie, Jing Chen, Yurui Zhang, Sijie Wei, Xinyue Ma, Ling Xiao, Lanzhou Chen
The co-contamination discharge of Phthalate esters (PAEs) by human activities and the increased UV radiation is increasing in aquatic ecosystems. However, little information is available about the combined detrimental effects of UV and PAEs on phytoplankton. In this study, the combined effects of UV-B irradiation and di-(2-ethylhexyl) phthalate (DEHP) on photosynthesis and antioxidant system of Scenedesmus acuminatus, and the DEHP degradation were investigated. Results showed that UV-B radiation decreased the chlorophyll a fluorescence yield, photosynthetic activity (Fv/Fm), pigment content and superoxide dismutase activity...
October 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/30136541/-simultaneous-determination-of-eight-phthalate-ester-plasticizers-in-sports-beverages-using-supercritical-fluid-chromatography
#17
Junfang Wei, Lei Jiang, Chaoyan Lou, Yan Zhu
Phthalate esters (PAEs) are a group of serious environmental pollutants that are carcinogenic or tumorigenic to humans. In this work, a green, rapid, and effective analytical method based on supercritical fluid chromatography (SFC) has been proposed for the simultaneous determination of the eight PAE plasticizers in sports beverage samples. They are dimethyl phthalate (DMP), diethyl phthalate (DEP), dipropyl phthalate (DPRP), dibutyl phthalate (DBP), dipentyl phthalate (DPP), benzyl butyl phthalate (BBP), di-2-ethylhexyl phthalate (DEHP), and di- n -octyl phthalate (DNOP)...
July 8, 2018: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/30113263/analysis-of-phthalate-esters-in-two-different-baby-care-products-available-in-united-arab-emirates
#18
Saba Farooqi, K Rajendran, Razia Khanam
Phthalates are used as plasticizers in a wide range of products and are known to affect the human health adversely. Hence, the present study was carried out to identify and quantify the presence of four phthalates namely dimethyl phthalate (DMP), dibutyl phthalate (DBP), and diethyl phthalate (DEP), di (2-ethylhexyl) phthalate (DEHP) in the two baby products i.e. baby oils and baby lotions. The daily exposure levels and hazard index of each phthalate were also calculated. It was an analytical study where two different brands of samples of baby oil and baby lotion each, from the date of manufacturing of 3, 10, and 20 months were collected...
September 26, 2018: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/30096548/insight-into-mechanism-of-aged-biochar-for-adsorption-of-paes-reciprocal-effects-of-ageing-and-coexisting-cd-2
#19
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+ ...
November 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
#20
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...
January 10, 2019: Science of the Total Environment
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