scholarly journals Toxicology of di-2-ethylhexyl phthalate and other phthalic acid ester plasticizers.

1973 ◽  
Vol 3 ◽  
pp. 73-79 ◽  
Author(s):  
R M Gesler
Keyword(s):  
Acid Ester ◽  
Phthalic Acid ◽  
Phthalic Acid Ester ◽  
Ethylhexyl Phthalate

scholarly journals Preliminary study on diminution level of RNA/DNA ratio in tissue of Labeo rohita by exposure to some endocrine disrupting compounds (EDCs)

2016 ◽  
Vol 1 (1) ◽  
pp. 16-20
Author(s):  
Rita Verma ◽  
Atul K. Singh ◽  
Kamal Jaiswal
Keyword(s):  
Acid Ester ◽  
Phthalic Acid ◽  
Natural Waters ◽  
Labeo Rohita ◽  
Statistical Significance ◽  
Endocrine Disrupting Compounds ◽  
Phthalic Acid Ester ◽  
Endocrine Disrupting ◽  
Butyl Phthalate ◽  
Ethylhexyl Phthalate

Effects of EDCs particularly on RNA/DNA ratio are yet to be investigated to manage the effluents in natural waters. We investigated exposure effects of endocrine disrupting compounds (EDCs) phthalic acid ester (PAE) and hexachlorocyclohexane (HCH) on the RNA/DNA ratio in tissue of an Indian major carp Labeo rohita. Fish were exposed to pre-determined sublethal concentrations of phthalic acid ester (Di-methyl phthalate (DMP), di-butyl phthalate (DBP), and di-(2- ethylhexyl) phthalate (DEHP) and also HCH for determining the tissue RNA/DNA ratio after 30, 60 and 90 days of exposure in the doses of 0.2 mg L-1, 0.3 mg L-1, and 0.5 mg L-1 respectively. All these tested chemicals significantly (P0.05) inhibited RNA/DNA ratio. The ratio gradually significantly (P0.05) decreased after DEHP where it was 1.9±0.51 F1, 18=15.8 P=0.014 n=19; in case of DBP it was 1.92±0.62 F1, 20=6.5 P=0.012 n=19 and for HCH it was 0.94±0.21 F1, 18=18.08 P=0.0012 n=19 at treatments concentrations of 0.3 mg L-1 and 0.5 mg L-1, compared to control (2.9±0.2) after 90 days. However, there was no statistical significance (P0.05) in RNA/DNA ratio after the DMP (F1, 20=2.4 P=0.15n=21) treatment.

scholarly journals Biodegradation of Di (2-Ethylhexyl) Phthalate by a novel Enterobacter spp. Strain YC-IL1 Isolated from Polluted Soil, Mila, Algeria

2020 ◽  
Vol 17 (20) ◽  
pp. 7501
Author(s):  
Imane Lamraoui ◽  
Adel Eltoukhy ◽  
Junhuan Wang ◽  
Messaouda Lamraoui ◽  
Amer Ahmed ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Acid Ester ◽  
Phthalic Acid ◽  
Degradation Pathway ◽  
Rrna Gene ◽  
16S Rrna Gene Analysis ◽  
Phthalic Acid Ester ◽  
Wide Range ◽  
Ring Structures ◽  
Ethylhexyl Phthalate

Di-(2-ethylhexyl) phthalate (DEHP) is one of the phthalic acid ester representatives and is mainly used as a plasticizer to endow polyvinyl chloride plastics with desirable physical properties. It is synthesized in massive amounts worldwide. Many studies have proved the adverse effects of DEHP on human health and wildlife. DEHP is labeled as an endocrine disruptor which causes human reproductive problems. Enterobacter spp. YC-IL1, a novel isolated strain from contaminated soil, was identified by 16S rRNA gene analysis and electronic microscope. It is capable of efficiently degrading DEHP (100%) and a wide range of phthalic acid ester PAEs, particularly those containing side chains with branches, or ring structures such as dutylbenzyl phthalate and dicyclohexyl phthalate, which are hard to degrade, with, respectively, 81.15% and 50.69% degradation after 7 days incubation. YC-IL1 is an acido-tolerant strain which remained in pH values lower than pH 5.0 with the optimum pH 7.0 and temperature 30 °C. The DEHP metabolites were detected using HPLC-QQQ and then the degradation pathway was tentatively proposed. Strain YC-IL1 showed high DEHP degradation rate in artificially contaminated soil with 86% removed in 6 days. These results indicate the application potential of YC-IL1 in bioremediation of PAE-polluted sites, even the acidic ones.

A new phthalic acid ester fromAjuga bracteosa

2006 ◽  
Vol 20 (6) ◽  
pp. 593-597 ◽  
Author(s):  
Narendra Singh ◽  
Umar Mahmood ◽  
V. K. Kaul ◽  
Leopold Jirovetz
Keyword(s):  
Acid Ester ◽  
Phthalic Acid ◽  
Phthalic Acid Ester

scholarly journals The Impact of Storage on Phthalic Acid Esters Concentrations in Yogurts Packed in Plastic Cups

2019 ◽  
Vol 67 (3) ◽  
pp. 689-693
Author(s):  
Marcela Jandlová ◽  
Vojtěch Kumbár ◽  
Alžbeta Jarošová ◽  
Markéta Stará ◽  
Roman Pytel ◽  
...  
Keyword(s):  
Acid Ester ◽  
Phthalic Acid ◽  
Limit Set ◽  
Phthalic Acid Esters ◽  
Bamboo Fibre ◽  
Phthalic Acid Ester ◽  
Significant Difference ◽  
The Impact ◽  
Acid Esters ◽  
Migration Limit

Phthalic acid esters are used as plastic softeners and also can be found in food packaging materials. European legislation defines specific migration limits of plastic additives for plastic materials that come into contact with food. This study monitors the phthalic acid ester concentrations in yogurts after manufacturing and then after a 3‑week storage. The studied yoghurts were natural yogurt with 1 % of chia flour, natural yogurt with 5 % of chia flour, natural yogurt with 1 % of bamboo fibre, natural yogurt with 5 % of bamboo fibre and natural yogurt. The analysed phthalic acid esters were dibutyl phthalate (DBP) and di‑(2‑ethylhexyl) phthalate (DEHP). The average phthalate concentrations in plastic cups were detected for DBP of 59.5 µg/g and for DEHP of 9.0 µg/g of the plastic material. Higher DBP concentrations than DEHP concentrations were also found in all studied yogurts. The average DBP concentrations in yogurts were detected from 1.8 µg/g up to 5.0 µg/g of the original matter and the average DEHP concentrations were determined from 0.5 µg/g up to 1.0 µg/g of the original matter. No statistically significant difference was found when comparing phthalic acid ester concentrations in yogurts immediately after production and after three weeks of storage. However, in our study in all cases of yogurts, the DBP concentrations were higher than the specific migration limit set by the legislation (0.3 mg/kg) and the DEHP concentrations were in all cases of yogurts lower than the specific migration limit set by the legislation (1.5 mg/kg).

Di-n-hexyl Phthalate (DHP), a Newly Identified Contaminant in Atlantic Herring (Clupea harengus harengus) and Atlantic Mackerel (Scomber scombrus)

1981 ◽  
Vol 38 (7) ◽  
pp. 856-859 ◽  
Author(s):  
Charles J. Musial ◽  
John F. Uthe ◽  
Gary R. Sirota ◽  
B. Garth Burns ◽  
Michael W. Gilgan ◽  
...  
Keyword(s):  
Acid Ester ◽  
Phthalic Acid ◽  
Clupea Harengus ◽  
Proton Nuclear Magnetic Resonance ◽  
Atlantic Herring ◽  
Isolation And Identification ◽  
Atlantic Mackerel ◽  
Scomber Scombrus ◽  
Phthalic Acid Ester ◽  
Clupea Harengus Harengus

We describe the isolation and identification of di-n-hexyl phthalate, a new marine pollutant found in Atlantic herring (Clupea harengus harengus) and Atlantic mackerel (Scomber scombrus). This compound was isolated from extracted lipids by a combination of gel permeation, high performance liquid and column chromatography, and selective precipitation of impurities. Conclusive proof of its structure was obtained from gas chromatographic–mass spectrometric analysis and proton nuclear magnetic resonance spectroscopy. The concentrations of di-n-hexyl phthalate (17–27 μg/g wet weight), which is not a major industrial phthalic acid ester, far exceeded those of dibutyl and di-2-ethylhexyl phthalates, the major industrial phthalic acid esters. Thus the possibility of selective bioaccumulation of DHP in herring and mackerel was indicated. This finding is important in view of the paucity of toxicological information concerning this compound.Key words: phthalic acid ester, di-n-hexyl phthalate (DHP), analysis, mackerel, herring, marine fish, pollution

A new trypsin inhibitory phthalic acid ester from Heliotropium strigosum

2013 ◽  
Vol 23 (6) ◽  
pp. 2712-2714 ◽  
Author(s):  
Syed Majid Shah ◽  
Azhar-ul-Haq Ali Shah ◽  
Farhat Ullah ◽  
Sajid Hussain ◽  
Sher Bahadar Khan ◽  
...  
Keyword(s):  
Acid Ester ◽  
Phthalic Acid ◽  
Phthalic Acid Ester
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