scholarly journals Animal carcass- and wood-derived biochars improved nutrient bioavailability, enzyme activity, and plant growth in metal-phthalic acid ester co-contaminated soils: A trial for reclamation and improvement of degraded soils

2020 ◽  
Vol 261 ◽  
pp. 110246 ◽  
Author(s):  
Hanbo Chen ◽  
Xing Yang ◽  
Hailong Wang ◽  
Binoy Sarkar ◽  
Sabry M. Shaheen ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Plant Growth ◽  
Contaminated Soils ◽  
Acid Ester ◽  
Phthalic Acid ◽  
Nutrient Bioavailability ◽  
Phthalic Acid Ester

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).

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.

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

scholarly journals Impact of Metal-Based Nanoparticles on Cambisol Microbial Functionality, Enzyme Activity, and Plant Growth

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2080
Author(s):  
Sergey Kolesnikov ◽  
Аlena Timoshenko ◽  
Tatiana Minnikova ◽  
Natalia Tsepina ◽  
Kamil Kazeev ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Seed Germination ◽  
Plant Growth ◽  
Enzymatic Activity ◽  
Contaminated Soils ◽  
Biological Properties ◽  
Significant Part ◽  
Critical Activity ◽  
Number Of Bacteria ◽  
Radish Seed

An increase in the penetration of metal-based nanoparticles (NPs) into the environment requires an assessment of their ecotoxicity as they impair the critical activity of plants, animals, bacteria, and enzymes. Therefore, the study aimed to observe the effects of metal-based NPs, including copper (Cu), nickel (Ni), and zinc (Zn), on the Cambisols, which cover a significant part of the earth's soil and play an important role in the biosphere. Metal-based NPs were introduced into the soil at concentrations of 100, 1,000, and 10,000 mg/kg. The biological properties of the soil are being investigated as the most sensitive to external contamination. The highest ecotoxicity of the studied pollutants introduced into the soil at the same concentrations was shown by Cu (up to 34%) and Zn (up to 30%) NPs, while Ni NPs showed less (up to 22%). Microbiological (total number of bacteria, Azotobacter sp. abundance) and phytotoxic properties (radish seed germination and length of roots) of Cambisols were more sensitive (22–53%) to pollution by NPs of Cu, Zn, and Ni, while enzymatic activity (catalase and dehydrogenases) showed less sensitivity (14–32%). The present results could be useful for biomonitoring the state of contaminated soils, especially by NPs.

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