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https://www.readbyqxmd.com/read/29154138/preparation-of-biochar-from-enteromorpha-prolifera-and-its-use-for-the-removal-of-polycyclic-aromatic-hydrocarbons-pahs-from-aqueous-solution
#1
Kaili Qiao, Weijun Tian, Jie Bai, Jie Dong, Jing Zhao, Xiaoxi Gong, Shuhui Liu
EP-biochar was produced from Enteromorpha prolifera (EP) at temperatures of 200-600°C under limited-oxygen conditions and then activated using HCl and HF. To optimize the sorption of pyrene (PYR) and benzo[a]pyrene (BaP), the effect of the pyrolysis temperature was studied, and the results showed that EP-biochar produced at 500°C gave the highest removal efficiency. The physiochemical properties of EP-biochar pyrolyzed at 500°C were characterized. The examination indicated that the surface area of EP-biochar was 205...
November 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154006/hydrodynamic-modelling-of-the-influence-of-stormwater-and-combined-sewer-overflows-on-receiving-water-quality-benzo-a-pyrene-and-copper-risks-to-recreational-water
#2
Karin Björklund, Mia Bondelind, Anna Karlsson, Dick Karlsson, Ekaterina Sokolova
The risk from chemical substances in surface waters is often increased during wet weather, due to surface runoff, combined sewer overflows (CSOs) and erosion of contaminated land. There are strong incentives to improve the quality of surface waters affected by human activities, not only from ecotoxicity and ecosystem health perspectives, but also for drinking water and recreational purposes. The aim of this study is to investigate the influence of urban stormwater discharges and CSOs on receiving water in the context of chemical health risks and recreational water quality...
November 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29144987/benzo-a-pyren-7-8-dihydrodiol-9-10-epoxide-induces-human-trophoblast-swan-71-cell-dysfunctions-due-to-cell-apoptosis-through-disorder-of-mitochondrial-fission-fusion
#3
Weiping Wang, Rong Wang, Qiao Zhang, Gil Mor, Huidong Zhang
Benzo(a)pyren-7,8-dihydrodiol-9,10-epoxide (BPDE) is an endocrine disrupter and ultimate carcinogenic product of benzo(a)pyrene (BaP). Numerous studies have shown that BPDE causes trophoblast-related diseases, such as preeclampsia, growth restriction or miscarriages. However, the underlying mechanism, especially the mitochondria-related BPDE-induced trophoblast dysfunction remains unknown. In this study, we examined mitochondrial functions in BPDE-induced human trophoblast cell line Swan 71. BPDE decreased cell ability, attenuated cell invasion and HCG secretion, induced cell apoptosis, decreased mitochondrial membrane potential, increased reactive oxygen species (ROS) and MDA, and decreased SOD activity in a dose-dependent manner...
November 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29142379/dyspnea-eosinopenia-consolidation-acidemia-and-atrial-fibrillation-score-and-bap-65-score-tools-for-prediction-of-mortality-in-acute-exacerbations-of-chronic-obstructive-pulmonary-disease-a-comparative-pilot-study
#4
Viral Sangwan, Dhruva Chaudhry, Roopa Malik
Introduction: Acute exacerbations of chronic obstructive pulmonary disease (AECOPD) being common and often fatal, prognostic tools in AECOPD are lacking. Materials and Methods: A prospective, observational study was carried out in fifty patients of AECOPD admitted in A and E department. Dyspnea, Eosinopenia, Consolidation, Acidemia and atrial Fibrillation (DECAF) score and elevated blood urea nitrogen, altered mental status, pulse >109, age >65 (BAP-65) score were calculated...
October 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29142148/seasonal-changes-in-serum-oxidative-stress-biomarkers-in-dairy-and-beef-cows-in-a-daytime-grazing-system
#5
Ahmad Nawid Mirzad, Takashi Tada, Hitoshi Ano, Ikuo Kobayashi, Takenori Yamauchi, Hiromu Katamoto
This study aims to evaluate the oxidative stress during hot summer season using serum oxidative stress biomarkers and elucidate the effects of serum antioxidant vitamin levels in dairy and beef cows in a daytime grazing system. Blood samples were collected once a month from eight Holstein Friesian (HF) and 10 Japanese Black (JB) cows from November 2013 to October 2014. Serum values of derivatives of reactive oxygen metabolites (d-ROMs) tended to be higher in March in both breeds and those in HF cows were kept at higher (P<0...
November 14, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29136594/quantitative-assessment-of-human-health-risks-induced-by-vehicle-exhaust-polycyclic-aromatic-hydrocarbons-at-zhengzhou-via-multimedia-fugacity-models-with-cancer-risk-assessment
#6
Qian Li, Minjeong Kim, Ying Liu, ChangKyoo Yoo
Traffic-related pollution released a large amount of atmospheric polycyclic aromatic hydrocarbons (PAHs) which have severely influenced environmental safety and human health until now. However, the important issue of polycyclic aromatic hydrocarbon (PAH) emission from vehicle exhaust in urban populated areas has not been sufficiently investigated yet. This study focused on environmental behavior of vehicle exhaust PAHs (VEPAHs) and resultant health risk on local residents in urban populated areas. This study combined the multimedia fugacity models (Level III and Level IV) and the incremental lifetime cancer risk (ILCR) model, for analyzing the VEPAHs' environmental fate and related health risk on local residents in Zhengzhou of the central China...
November 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29129842/association-of-perioperative-redox-balance-on-long-term-outcome-in-patients-undergoing-lung-resection
#7
Osamu Araki, Yuji Matsumura, Takashi Inoue, Yoko Karube, Sumiko Maeda, Satoru Kobayashi, Masayuki Chida
PURPOSE: We examined whether redox balance during the perioperative period is associated with long-term survival of patients after undergoing lung resection. METHODS: Patients who underwent surgery for lung cancer from January to June 2013 at our institution were investigated. Serum was collected during the operation, and on postoperative day (POD) 3 and 7, and the levels of derivatives of reactive oxygen metabolites (d-ROMs) and biologic antioxidant potential (BAP) were measured...
November 10, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29127642/predictors-of-mental-health-in-chinese-parents-of-children-with-autism-spectrum-disorder-asd
#8
Xueyun Su, Ru Ying Cai, Mirko Uljarević
The aim of this study was to explore the influence of parental intolerance of Uncertainty (IU), sensory sensitivity (SS) and Broader Autism Phenotype (BAP), as well as the severity of their children's autism symptoms and co-morbid symptoms, on the mental health of Chinese parents of children with autism spectrum disorder (ASD). One hundred and twenty-two parents (86.9% mothers; M age = 35.64 years, SD = 4.21) of children with ASD took part. Regression and mediation analyses showed that children's internalizing difficulties, parental BAP and IU had a direct effect, and SS had an indirect effect through IU, on parental mental health...
November 11, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/29126005/colorimetric-recognition-of-6-benzylaminopurine-in-environmental-samples-by-using-thioglycolic-acid-functionalized-silver-nanoparticles
#9
Mingda Zheng, Jiang He, Yingying Wang, Chenge Wang, Shuang Ma, Xiaohan Sun
A simple and selective colorimetric sensor thioglycolic acid capped silver nanoparticles (TGA-AgNPs) was developed for the detection of 6-benzylaminopurine (6-BAP). The synthesized TGA-AgNPs were characterized by UV-vis spectroscopy, dynamic light scattering (DLS), and transmission electron microscopic (TEM) techniques. The TGA-AgNPs as a sensor for binding 6-BAP through hydrogen-bonding and π-π bonding that causes large conjugate clusters, resulting in a color change from yellow to reddish orange. The surface plasmon resonance (SPR) band of TGA-AgNPs at 397nm is red-shifted to 510nm, which confirms that 6-BAP induces the aggregation of TGA-AgNPs...
October 31, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29124962/effect-of-ultrasonic-waves-on-crocin-and-safranal-content-and-expression-of-their-controlling-genes-in-suspension-culture-of-saffron-crocus-sativus%C3%A2-l
#10
Tofigh Taherkhani, Rasool Asghari Zakaria, Mansoor Omidi, Naser Zare
The expression of biosynthesis controlling genes of crocin and safranal in saffron (Crocus sativus) can be influenced by ultrasonic waves. Sterilized saffron corms were cultured in a ½-MS medium supplemented by 2-4-D and BAP.  Saffron callus cells were treated with ultrasonic waves in a cellular suspension culture under optimal growth conditions. The samples were collected at 24 and 72 hours after treatment in three replications. The secondary metabolites were measured by high-performance liquid chromatography and the gene expression was analysed by the real-time polymerase chain reaction...
November 10, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29117145/burden-of-mortality-and-disease-attributable-to-multiple-air-pollutants-in-warsaw-poland
#11
Piotr Holnicki, Marko Tainio, Andrzej Kałuszko, Zbigniew Nahorski
Air pollution is a significant public health issue all over the world, especially in urban areas where a large number of inhabitants are affected. In this study, we quantify the health burden due to local air pollution for Warsaw, Poland. The health impact of the main air pollutants, PM, NOX, SO₂, CO, C₆H₆, BaP and heavy metals is considered. The annual mean concentrations are predicted with the CALPUFF air quality modeling system using the year 2012 emission and meteorological data. The emission field comprises point, mobile and area sources...
November 8, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29112712/the-protective-role-of-melatonin-in-porcine-oocyte-meiotic-failure-caused-by-the-exposure-to-benzo-a-pyrene
#12
Yilong Miao, Changyin Zhou, Qingyun Bai, Zhaokang Cui, Xiayan ShiYang, Yajuan Lu, Mianqun Zhang, Xiaoxin Dai, Bo Xiong
STUDY QUESTION: Does melatonin restore the benzo(a)pyrene (BaP)-induced meiotic failure in porcine oocytes? SUMMARY ANSWER: Melatonin effectively inhibits the increased reactive oxygen species (ROS) level and apoptotic rate in BaP-exposed porcine oocytes to recover the meiotic failure. WHAT IS KNOWN ALREADY: BaP, a widespread environmental carcinogen found in particulate matter, 2.5 µm or less (PM2.5), has been shown to have toxicity at the level of the reproductive systems...
November 3, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29111668/ultrasensitive-high-resolution-mass-spectrometric-analysis-of-a-dna-adduct-of-the-carcinogen-benzo-a-pyrene-in-human-lung
#13
Peter W Villalta, J Bradley Hochalter, Stephen S Hecht
Benzo[a]pyrene (BaP), an archetypical polycyclic aromatic hydrocarbon, is classified as "carcinogenic to humans" and is ubiquitous in the environment, as evident by the measurable levels of BaP metabolites in virtually all human urine samples examined. BaP carcinogenicity is believed to occur mainly through its covalent modification of DNA, resulting in the formation of BPDE-N(2)-dG, an adduct formed between deoxyguanosine and a diol epoxide metabolite of BaP, with subsequent mutation of critical growth control genes...
November 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29109435/developing-a-black-carbon-substituted-multimedia-model-for-simulating-the-pah-distributions-in-urban-environments
#14
Chunhui Wang, Shenglu Zhou, Yue He, Junxiao Wang, Fei Wang, Shaohua Wu
A multimedia fugacity model with spatially resolved environmental phases at an urban scale was developed. In this model, the key parameter, organic matter, was replaced with black carbon (BC) and applied to simulate the distributions of phenanthrene (Phe), pyrene (Pyr) and benzo[α]pyrene (BaP) in Nanjing, China. Based on the estimated emissions and measured inflows of air and water, the Phe, Pyr and BaP concentrations in different environment media were calculated under steady-state assumptions. The original model (OC-Model), BC-inclusive model (dual C-Model) and improved model (BC-Model) were validated by comparing observed and predicted Phe, Pyr and BaP concentrations...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29104317/comparison-of-human-cytochrome-p450-1a1-catalysed-oxidation-of-benzo-a-pyrene-in-prokaryotic-and-eukaryotic-expression-systems
#15
Marie Stiborová, Radek Indra, Michaela Moserová, Lucie Bořek-Dohalská, Petr Hodek, Eva Frei, Klaus Kopka, Heinz H Schmeiser, Volker M Arlt
Abstract: Cytochrome P450 (CYP) 1A1 is the most important enzyme activating and detoxifying the human carcinogen benzo[a]pyrene (BaP). In the previous studies, we had shown that not only the canonic NADPH:CYP oxidoreductase (POR) can act as electron donor but also cytochrome b5 and its reductase, NADH:cytochrome b5 reductase. Here, we studied the role of the expression system used on the metabolites generated and the levels of DNA adducts formed by activated BaP. We used an eukaryotic and a prokaryotic cellular system (Supersomes, microsomes isolated from insect cells, and Bactosomes, a membrane fraction of Escherichia coli, each transfected with cDNA of human CYP1A1 and POR)...
2017: Monatshefte Für Chemie
https://www.readbyqxmd.com/read/29102294/anaerobic-biodegradation-of-benzo-a-pyrene-by-a-novel-cellulosimicrobium-cellulans-cws2-isolated-from-polycyclic-aromatic-hydrocarbon-contaminated-soil
#16
Wei Qin, Fuqiang Fan, Yi Zhu, Xiaolong Huang, Aizhong Ding, Xiang Liu, Junfeng Dou
Cellulosimicrobium cellulans CWS2, a novel strain capable of utilizing benzo(a)pyrene (BaP) as the sole carbon and energy source under nitrate-reducing conditions, was isolated from PAH-contaminated soil. Temperature and pH significantly affected BaP biodegradation, and the strain exhibited enhanced biodegradation ability at temperatures above 30°C and between pH 7 and 10. The highest BaP removal rate (78.8%) was observed in 13 days when the initial BaP concentration was 10mg/L, and the strain degraded BaP at constant rate even at a higher concentration (50mg/L)...
October 12, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29101890/long-term-trends-in-atmospheric-concentrations-of-polycyclic-aromatic-hydrocarbons-and-nitropolycyclic-aromatic-hydrocarbons-a-study-of-japanese-cities-from-1997-to-2014
#17
Kazuichi Hayakawa, Ning Tang, Edward Gou Nagato, Akira Toriba, Shigekatsu Sakai, Fumio Kano, Sumio Goto, Osamu Endo, Kei-Ichi Arashidani, Hitoshi Kakimoto
Total suspended particulate matter (TSP) was collected during the summer and winter in five Japanese cities spanning Hokkaido to Kyushu (Sapporo, Kanazawa, Tokyo, Sagamihara and Kitakyushu) from 1997 to 2014. Nine polycyclic aromatic hydrocarbons (PAHs) with four to six rings, including pyrene (Pyr) and benzo[a]pyrene (BaP), were identified using high-performance liquid chromatography (HPLC) with fluorescence detection. Two nitropolycyclic aromatic hydrocarbons (NPAHs), 1-nitropyrene (1-NP) and 6-nitrobenzo[a]pyrene (6-NBaP), were identified by HPLC with chemiluminescence detection...
November 1, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29101605/cholesterol-homeostasis-and-cell-proliferation-by-mitogenic-homologs-insulin-benzo-%C3%AE-pyrene-and-uv-radiation
#18
Hemlata Pandey, Ayantika Talukdar, Jeremy S Gangte, S Datta Gupta, N C Chandra
Low-Density Lipoprotein (LDL) is known to promote the unregulated proliferation of cells that is progression of cancer. We aimed to investigate the effect of mitogens on the expression of cell cycle proteins, nuclear cholesterol and cell proliferation. We observed that insulin and benzo-α-pyrene (BaP) induced the expression of Low-Density Lipoprotein receptor (LDLR) on HepG2 cells, thereby enhancing the uptake of LDL. The internalized LDL increased the concentration of cholesterol in the cytoplasm and nucleus of the cell...
November 3, 2017: Cell Biology and Toxicology
https://www.readbyqxmd.com/read/29083985/assessing-contamination-of-smoked-sprats-sprattus-sprattus-with-polycyclic-aromatic-hydrocarbons-pahs-and-changes-in-its-level-during-storage-in-various-types-of-packaging
#19
Kamila Kuźmicz, Artur Ciemniak
The analysis of material used in this study demonstrated that the amount of polycyclic aromatic hydrocarbons (PAHs) in smoked sprats varies from the level below the lowest detection limit in muscles up to 9.99 µg kg(-1) of benzo[a]pyrene (BaP) in fish skin. Such a high level of PAHs in skin was reported only in one of six batches of sprats, while mean BaP level was at 1.69 µg kg(-1). Regardless such a high BaP level in skin, its concentration in muscles did not exceed the maximum acceptable level. The study objective was to assess to what extent packaging materials adsorb PAH compounds from food...
October 30, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29083271/long-term-stability-of-oxidative-stress-biomarkers-in-human-serum
#20
Eugène H J M Jansen, Piet K Beekhof, Dale Viezeliene, Vladimira Muzakova, Jiri Skalicky
The storage time and storage temperature might affect stability of oxidative stress biomarkers, therefore, they have to be analyzed after long-term storage of serum samples. The stability of three biomarkers reflecting oxidative stress: reactive oxygen metabolites (ROM) for hydroperoxides, total thiol levels (TTL) for the redox status and biological antioxidant potency (BAP) for the antioxidant status, was investigated at several time points during 60 months of storage at -20 °C and -80 °C. Biomarkers ROM and BAP showed a very good stability during storage for 60 months at both temperatures...
October 30, 2017: Free Radical Research
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