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https://www.readbyqxmd.com/read/29656225/biodegradation-of-acrylamide-by-a-novel-isolate-cupriavidus-oxalaticus-ictdb921-identification-and-characterization-of-the-acrylamidase-produced
#1
Dattatray K Bedade, Rekha S Singhal
Acrylamide is neurotoxic, genotoxic, teratogenic and carcinogenic. Its widespread use in various industrial processes leads to environmental contamination. Acrylamidase produced by certain bacteria degrade acrylamide to acrylic acid and ammonia. The present study details the isolation and identification of soil bacterium which could degrade acrylamide. Among the 18 acrylamide-degrading isolates tested, isolate ICTDB921 demonstrated superior acrylamide degradation which was confirmed by HPLC, FTIR and GC-MS...
April 6, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29629467/currently-used-organophosphate-flame-retardants-determined-in-the-settled-dust-of-masjids-and-hotels-of-saudi-arabia-a-new-insight-into-human-health-implications-of-dust-exposure
#2
Nadeem Ali, Iqbal Mohammad Ibrahim Ismail, Mohammad W Kadi, Hussain Mohammed Salem Ali Albar
Indoor settled dust particles are considered as an important source of human exposure to chemicals such as organophosphate flame retardants (PFRs). In recent decades the Kingdom of Saudi Arabia (KSA) has experienced tremendous growth in population, as a result the number of masjids has also increased significantly to provide sufficient space for the public to offer prayers. The hospitality industry in KSA is also expanding to cater for the ever-increasing number of pilgrims visiting the two holy cities of the kingdom...
April 9, 2018: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29623249/therapeutic-applications-of-bacterial-pigments-a-review-of-current-status-and-future-opportunities
#3
REVIEW
Muhammad Numan, Samina Bashir, Roqayya Mumtaz, Sibgha Tayyab, Najeeb Ur Rehman, Abdul Latif Khan, Zabta Khan Shinwari, Ahmed Al-Harrasi
Non-toxicity, biodegradability and non-carcinogenicity of the natural pigments, dyes and colorants make them an attractive source for human use. Bacterial pigments are colored metabolites secreted by bacteria under stress. The industrial uses of bacterial pigments have increased many folds because of several advantages over the synthetic pigments. Among natural resources, bacterial pigments are mostly preferred because of simple culturing and pigment extraction techniques, scaling up and being time economical...
April 2018: 3 Biotech
https://www.readbyqxmd.com/read/29621690/albizia-chevalier-based-ag-nanoparticles-anti-proliferation-bactericidal-and-pollutants-degradation-performance
#4
Shahid Ali Khan, Bello Aminu Bello, Jalaluddin Awllia Khan, Yasir Anwar, Muqtadir Baig Mirza, Fareed Qadri, Aliya Farooq, Ibrahim Khalil Adam, Abdullah Muhammad Asiri, Sher Bahadar Khan
The eco-friendly biosynthesis of silver nanoparticles (AgNps) from bark extract of Albizia chevalier are reported here for their anti-proliferative, antibacterial and pollutant degradation potentials. The synthesized AgNps were characterized by FTIR spectroscopy, transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), energy dispersive X-rays spectrometry (EDS) and X-ray diffraction studies. The TEM and FESEM images show a monodispersed spherical shaped particles of approximately 30 nm...
March 26, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29594919/chemometric-evaluation-of-heavy-metal-pollutions-in-patna-region-of-the-ganges-alluvial-plain-india-implication-for-source-apportionment-and-health-risk-assessment
#5
Ningombam Linthoingambi Devi, Ishwar Chandra Yadav
While metal pollution and distribution in soil are well documented for many countries, the situation is more serious in developing countries because of the rapid increase in industrialization and urbanization during last decades. Although it is well documented in developed countries, data about substantial metal pollution in Indian soil, especially in eastern Ganges alluvial plain (GAP), are limited. In this study, eight different blocks of Patna district located in eastern GAP were selected to investigate the contamination, accumulation, and sources of metals in surface soil considering different land use types...
March 28, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29587708/gender-differences-in-occupational-exposure-to-carcinogens-among-italian-workers
#6
Alberto Scarselli, Marisa Corfiati, Davide Di Marzio, Alessandro Marinaccio, Sergio Iavicoli
BACKGROUND: Many carcinogenic chemicals are still used or produced in several economic sectors. The aim of this study is to investigate differences in occupational exposure patterns to carcinogens by gender in Italy. METHODS: Information about the most common carcinogens recorded in the Italian occupational exposures database (SIREP) for the period 1996-2015 was retrieved. Descriptive statistics were calculated for exposure-related variables (carcinogenic agent, occupational group, economic activity sector, and workforce size)...
March 27, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29582265/source-identification-environmental-risk-assessment-and-human-health-risks-associated-with-toxic-elements-present-in-a-coastal-industrial-environment-india
#7
Shreemayee Satapathy, C R Panda
This study investigated the source and contamination levels of toxic elements (Cd, Cr, As, Pb, Ni and Hg) present in a coastal environment, Paradip-an industrial hub of the east coast of India. The ecological risk assessment indices and human exposure models were used to evaluate the pollution status. Enrichment factor indicated that all the metal(loid)s found in the sediment are mostly derived from the anthropogenic source. According to the sediment quality quotient, 8.33% of sediments have crossed the ERM limit for Ni that can be fatal to biota...
March 26, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29578695/a-review-of-environmental-occurrence-fate-exposure-and-toxicity-of-benzothiazoles
#8
Chunyang Liao, Un-Jung Kim, Kurunthachalam Kannan
Benzothiazole and its derivatives (BTHs) are high production volume chemicals that have been used for several decades in a large number of industrial and consumer products, including vulcanization accelerators, corrosion inhibitors, fungicides, herbicides, algicides, and ultraviolet (UV) light stabilizers. Several BTH derivatives are used commercially, and widespread use of these chemicals has led to ubiquitous occurrence in diverse environmental compartments. BTHs have been reported to be dermal sensitizers, respiratory tract irritants, endocrine disruptors, carcinogens, and genotoxicants...
March 26, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29573689/source-apportionment-and-carcinogenic-risk-assessment-of-passive-air-sampler-derived-pahs-and-pcbs-in-a-heavily-industrialized-region
#9
Banu Cetin, Sema Yurdakul, Elif Gungormus, Fatma Ozturk, Sait C Sofuoglu
Cancer has become the primary reason of deaths in Dilovasi probably due to its location with unique topography under the influence of heavy industrialization and traffic. In this study, possible sources and carcinogenic health risks of PAHs and PCBs were investigated in Dilovasi region by Positive Matrix Factorization (PMF) and the USEPA approach, respectively. PAHs and PCBs were measured monthly for a whole year at 23 sampling sites using PUF disk passive samplers. Average ambient air concentrations were found as 285±431ng/m3 and 4152±6072pg/m3 , for Σ15 PAH and Σ41 PCB, respectively...
March 21, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29567292/n-terminome-and-proteogenomic-analysis-of-the-methylobacterium-extorquens-dm4-reference-strain-for-dichloromethane-utilization
#10
Sabrina Bibi-Triki, Gauthier Husson, Bruno Maucourt, Stéphane Vuilleumier, Christine Carapito, Françoise Bringel
Methylobacterium strains can use one-carbon compounds, such as methanol, for methylotrophic growth. In addition to methanol, a few strains also utilize dichloromethane, a major industrial chlorinated solvent pollutant. With a fully assembled and annotated genome, M. extorquens DM4 is the reference bacterium for aerobic dichloromethane degradation. The doublet N-terminal oriented proteomics (dN-TOP) strategy was applied to further improve its genome annotation and a differential proteomics approach was performed to compare M...
March 19, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29565939/carcinogenicity-of-glyphosate-why-is-new-zealand-s-epa-lost-in-the-weeds
#11
Jeroen Douwes, Andrea 't Mannetje, Dave McLean, Neil Pearce, Alistair Woodward, John D Potter
In 2015, the International Agency for Research on Cancer (IARC) concluded that glyphosate is "probably carcinogenic to humans". The New Zealand Environmental Protection Authority (NZEPA) rejected this and commissioned a new report, concluding that glyphosate was unlikely to be genotoxic or carcinogenic to humans. The NZEPA has argued that the difference arose because IARC is a "hazard-identification authority", whereas NZEPA is a "regulatory body that needs to cast the net more widely"...
March 23, 2018: New Zealand Medical Journal
https://www.readbyqxmd.com/read/29561703/chromium-disrupts-chromatin-organization-and-ctcf-access-to-its-cognate-sites-in-promoters-of-differentially-expressed-genes
#12
Andrew VonHandorf, Francisco Javier Sánchez-Martín, Jacek Biesiada, Hongxia Zhang, Xiang Zhang, Mario Medvedovic, Alvaro Puga
Hexavalent chromium compounds are well-established respiratory carcinogens used in industrial processes. While inhalation exposure constitutes an occupational risk affecting mostly chromium workers, environmental exposure from drinking water is a widespread gastrointestinal cancer risk, affecting millions of people throughout the world. Cr(VI) is genotoxic, forming protein-Cr-DNA adducts and silencing tumor suppressor genes, but its mechanism of action at the molecular level is poorly understood. Our prior work using FAIRE showed that Cr(VI) disrupted the binding of transcription factors CTCF and AP-1 to their cognate chromatin sites...
March 21, 2018: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/29549472/metals-and-metalloids-in-pm-10-in-nandan-county-guangxi-china-and-the-health-risks-posed
#13
Guanghui Guo, Bo Song, Deshang Xia, Zijie Yang, Fopeng Wang
Intense mining, smelting, and tailing activities of polymetallic ore deposits have affected the environment in Nandan County, Guangxi, China. Samples of particulates with aerodynamic diameters low or equal 10 μm (PM10 ) were collected in Nandan County to investigate the concentrations of and health risks posed by 17 metals and metalloids in the PM10 . The metal and metalloid concentrations were lower than those found in other industrial cities. The mean Cr concentration was 7.48 ng/m3 . Significant higher metal and metalloid concentrations were found in PM10 from mining areas (Dachang and Chehe) than from the control area (Liuzhai) (p < 0...
March 16, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29546511/accumulation-fractionation-and-risk-assessment-of-mercury-and-arsenic-in-the-soil-wheat-system-from-the-wastewater-irrigated-soil-in-baiyin-northwest-china
#14
Qian Zhang, Shengli Wang, Zhongren Nan, Yepu Li, Fei Zang
Wastewater irrigation can increase metal concentrations in soil and wheat, thereby posing metal-associated health risk via food ingestion. We investigated levels of mercury (Hg) and arsenic (As) in roots, husks, stems, leaves, and grains of wheat and their fractionations in farmland soil from Baiyin City, an industrial and mining city, northwest China. Results show that the mean concentrations of Hg in soils from Dongdagou and Xidagou stream in Baiyin were 8.5 times and three times higher than local soil background values, respectively...
March 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29541638/dietary-acrylamide-and-the-risks-of-developing-cancer-facts-to-ponder
#15
REVIEW
Jaya Kumar, Srijit Das, Seong Lin Teoh
Acrylamide (AA) is a water soluble white crystalline solid commonly used in industries. It was listed as an industrial chemical with potential carcinogenic properties. However to date, AA was used to produce polyacrylamide polymer, which was widely used as a coagulant in water treatment; additives during papermaking; grouting material for dams, tunnels, and other underground building constructions. AA in food could be formed during high-temperature cooking via several mechanisms, i.e., formation via acrylic acid which may be derived from the degradation of lipid, carbohydrates, or free amino acids; formation via the dehydration/decarboxylation of organic acids (malic acid, lactic acid, and citric acid); and direct formation from amino acids...
2018: Frontiers in Nutrition
https://www.readbyqxmd.com/read/29540567/sinonasal-adenocarcinoma-following-styrene-exposure-in-the-reinforced-plastics-industry
#16
Mette Schou Nissen, Zara Ann Stokholm, Mette Skovgaard Christensen, Vivi Schlünssen, Jesper Medom Vestergaard, Inge Brosbøl Iversen, Henrik Albert Kolstad
BACKGROUND: Sinonasal adenocarcinoma is a rare disease expected to have rare causes and potential for strong risk factors as reflected by the strong association with occupational wood dust exposure. High level styrene exposure is a rare and suspected carcinogen, and this study examines the exposure-response relation between occupational styrene exposure, sinonasal adenocarcinoma and other subtypes. METHODS: We followed 73 092 styrene-exposed workers from 1968 to 2011 and identified sinonasal cancers in the Danish Cancer Registry...
March 14, 2018: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29525714/contamination-source-apportionment-and-health-risk-assessment-of-heavy-metals-in-soil-around-municipal-solid-waste-incinerator-a-case-study-in-north-china
#17
Wenchao Ma, Lingyu Tai, Zhi Qiao, Lei Zhong, Zhen Wang, Kaixuan Fu, Guanyi Chen
Few studies have comprehensively taken into account the source apportionment and human health risk of soil heavy metals in the vicinity of municipal solid waste incinerator (MSWI) in high population density area. In this study, 8 elements (Cr, Pb, Cu, Ni, Zn, Cd, Hg, and As) in fly ash, soil samples from different functional areas and vegetables collected surrounding the MSWI in North China were determined. The single pollution index, integrated Nemerow pollution index, principal component analysis (PCA), absolute principle component score-multiple linear regression (APCS-MLR) model and dose-response model were used in this study...
March 8, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29525663/evaluation-of-toxicity-mutagenicity-and-carcinogenicity-of-samples-from-domestic-and-industrial-sewage
#18
Cássio Resende de Morais, Ana Maria Bonetti, Alexandre Aparecido Mota, Carlos Fernando Campos, Henrique Nazareth Souto, Maria Paula Carvalho Naves, Vanessa Santana Vieira Santos, Edimar Olegário de Campos Júnior, Luiz Alfredo Pavanin, Alexandre Azenha Alves de Rezende, Mário Antônio Spanó, Boscolli Barbosa Pereira
Physico-chemical and toxicological analyses are of fundamental importance to determine water quality. The objectives of the present study were to evaluate the toxicity, mutagenicity and carcinogenicity of samples from the Mumbuca Stream and the Perdizes River, through both SMART and the wts test, respectively, in somatic cells of Drosophila melanogaster and to quantify the amount of heavy metals and other pollutants, which are indicative of environmental quality. Water samples were collected (M1, M2, P1, P2 and MP) and submitted to physico-chemical analysis, calculating the water quality index for each sampling site...
March 3, 2018: Chemosphere
https://www.readbyqxmd.com/read/29525630/risk-analysis-of-heavy-metal-concentration-in-surface-waters-across-the-rural-urban-interface-of-the-wen-rui-tang-river-china
#19
Liyin Qu, Hong Huang, Fang Xia, Yuanyuan Liu, Randy A Dahlgren, Minghua Zhang, Kun Mei
Heavy metal pollution is a major concern in China because of its serious effects on human health. To assess potential human health and ecological risks of heavy metal pollution, concentration data for seven heavy metals (As, Pb, Cd, Cr, Hg, Cu, Zn) from 14 sites spanning the rural-urban interface of the Wen-Rui Tang River watershed in southeast China were collected from 2000 to 2010. The heavy metal pollution index (HPI), hazard index (HI) and carcinogenic risk (CR) metrics were used to assess potential heavy metal risks...
March 8, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29524815/benzene-induced-resistance-in-exposed-drosophila-melanogaster-outcome-of-improved-detoxification-and-gene-modulation
#20
Divya Sharma, Mahendra Pratap Singh, Divya Vimal, Saurabh Kumar, Rakesh Roshan Jha, D Kar Chowdhuri
Adaptive behaviour of an organism has relevance towards developing better resistance in subsequent generations following xenobiotic exposures. Using a genetically tractable and functional insect model, Drosophila melanogaster, we aimed to examine the resistance of the organism against repeated exposures of benzene, an industrial and environmental-chemical and a class I human carcinogen. While 100 mM benzene exposure to one-day old flies for seven days caused ∼95% mortality (F0), its exposure to subsequent generations of flies led a significant decrease in mortality with maximum survival (∼85%) as evident at F28 generation...
February 23, 2018: Chemosphere
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