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https://www.readbyqxmd.com/read/27912189/genotoxicity-assessment-of-pulp-and-paper-mill-effluent-before-and-after-bacterial-degradation-using-allium-cepa-test
#1
Izharul Haq, Sharad Kumar, Abhay Raj, Mohtashim Lohani, G N V Satyanarayana
A lignin peroxidases-producing Serratia liquefaciens was used for bioremediation of pulp and paper (P&P) mill effluent. The treatment led to reduction of chemical oxygen demand (COD), colour, lignin and phenolic content by 84%, 72%, 61% and 95%, respectively. The effluent detoxification was studied by genotoxicity assays using Allium cepa L. (onion) root tip cells. Genotoxicity studies included measuring mitotic index (MI), chromosomal aberrations (CA) and nuclear abnormalities (NA) in root tip cells following treatment with 25, 50, 75 and 100% (v/v) of effluent...
November 29, 2016: Chemosphere
https://www.readbyqxmd.com/read/27891157/the-in-vitro-antimicrobial-effects-of-lavandula-angustifolia-essential-oil-in-combination-with-conventional-antimicrobial-agents
#2
Stephanie de Rapper, Alvaro Viljoen, Sandy van Vuuren
The paper focuses on the in vitro antimicrobial activity of Lavandula angustifolia Mill. (lavender) essential oil in combination with four commercial antimicrobial agents. Stock solutions of chloramphenicol, ciprofloxacin, nystatin, and fusidic acid were tested in combination with L. angustifolia essential oil. The antimicrobial activities of the combinations were investigated against the Gram-positive bacterial strain Staphylococcus aureus (ATCC 6538) and Gram-negative Pseudomonas aeruginosa (ATCC 27858) and Candida albicans (ATCC 10231) was selected to represent the yeasts...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/27883873/doctors
#3
Gaya Sritharan, Amber C Mills, Michele R Levinson, Anthea L Gellie
Objectives The aims of the present study were to investigate doctors' attitudes regarding the discussion and writing of not for resuscitation (NFR) orders and to identify potential barriers to the completion of these orders.Methods A questionnaire-based convenience study was undertaken at a tertiary hospital. Likert scales and open-ended questions were directed to issues surrounding the discussion, timing, understanding and writing of NFR orders, including legal and personal considerations.Results Doctors thought the presence of an NFR order both should and does alter care delivered by nursing staff, particularly delivery of pain relief, nursing observations and contacting the medical emergency team...
November 25, 2016: Australian Health Review: a Publication of the Australian Hospital Association
https://www.readbyqxmd.com/read/27878656/mille-modis-morimur-we-die-in-a-thousand-ways
#4
Gaspar Banfalvi
Dying cells subjected to apoptotic programs are engulfed by neighboring cells or by professional phagocytes, without inflammation or immunological reactions in the tissue where apoptosis takes place. Apoptotic cells release danger-associated project signals to their neighbours, through different molecular patterns, stimulate antigen production and immune responses. Microenvironmental effects with several functional consequences indicate that cell death is a complex process and may take place in several ways...
November 23, 2016: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/27866739/an-integrated-approach-for-identifying-priority-contaminant-in-the-great-lakes-basin-investigations-in-the-lower-green-bay-fox-river-and-milwaukee-estuary-areas-of-concern
#5
Shibin Li, Daniel L Villeneuve, Jason P Berninger, Brett R Blackwell, Jenna E Cavallin, Megan N Hughes, Kathleen M Jensen, Zachary Jorgenson, Michael D Kahl, Anthony L Schroeder, Kyle E Stevens, Linnea M Thomas, Matthew A Weberg, Gerald T Ankley
Environmental assessment of complex mixtures typically requires integration of chemical and biological measurements. This study demonstrates the use of a combination of instrumental chemical analyses, effects-based monitoring, and bio-effects prediction approaches to help identify potential hazards and priority contaminants in two Great Lakes Areas of Concern (AOCs), the Lower Green Bay/Fox River located near Green Bay, WI, USA and the Milwaukee Estuary, located near Milwaukee, WI, USA. Fathead minnows were caged at four sites within each AOC (eight sites total)...
November 17, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27854264/integrated-exposure-based-therapy-for-co-occurring-post-traumatic-stress-disorder-ptsd-and-substance-dependence-predictors-of-change-in-ptsd-symptom-severity
#6
Katherine L Mills, Emma L Barrett, Sabine Merz, Julia Rosenfeld, Philippa L Ewer, Claudia Sannibale, Amanda L Baker, Sally Hopwood, Sudie E Back, Kathleen T Brady, Maree Teesson
This paper examines factors associated with change in PTSD symptom severity among individuals randomised to receive an integrated exposure-based psychotherapy for PTSD and substance dependence-Concurrent Treatment of PTSD and Substance Use Disorders Using Prolonged Exposure (COPE). Outcomes examined include change in PTSD symptom severity as measured by the Clinician Administered PTSD Scale (CAPS), and the reliability and clinical significance of change in PTSD symptom severity. Factors examined include patient baseline characteristics, treatment characteristics, and events over follow-up...
November 15, 2016: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/27816611/vitamin-e-emerging-aspects-and-new-directions
#7
REVIEW
Francesco Galli, Angelo Azzi, Marc Birringer, Joan M Cook-Mills, Manfred Eggersdorfer, Jan Frank, Gabriele Cruciani, Stefan Lorkowski, Nesrin Kartal Özer
The discovery of vitamin E will have its 100th anniversary in 2022, but we still have more questions than answers regarding the biological functions and the essentiality of vitamin E for human health. Discovered as a factor essential for rat fertility and soon after characterized for its properties of fat-soluble antioxidant, vitamin E was identified to have signaling and gene regulation effects in the 1980s. In the same years the cytochrome P-450 dependent metabolism of vitamin E was characterized and a first series of studies on short-chain carboxyethyl metabolites in the 1990s paved the way to the hypothesis of a biological role for this metabolism alternative to vitamin E catabolism...
November 2, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/27808443/evaluating-the-potential-of-effluent-extracts-from-pulp-and-paper-mills-in-canada-brazil-and-new-zealand-to-affect-fish-reproduction-estrogenic-effects-in-fish
#8
Rodrigo Orrego, Craig B Milestone, L Mark Hewitt, John Guchardi, Tatiana Heid-Furley, Alison Slade, Deborah L MacLatchy, Douglas Holdway
This study examined the potential of pulp mill effluent from pulp producing countries (Canada, Brazil, New Zealand) to affect fish reproduction. Specifically, the estrogenic effects in juvenile rainbow trout (Oncorhynchus mykiss) pulse-exposed to 11 different mill effluent extracts (intra peritoneal IP-injections of SPE-DCM non-polar fraction). The results indicated that effluent extracts were estrogenic in juvenile trout irrespective of the gender, reflected by increasing level of plasma vitellogenin (VTG) (Brazil > New Zealand > Canada)...
November 3, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27807968/a-portable-and-disposable-paper-based-fluorescent-sensor-for-in-situ-gaseous-hydrogen-sulfide-determination-in-near-real-time
#9
João Flávio da Silveira Petruci, Arnaldo Alves Cardoso
Hydrogen sulfide is found in many environments including sewage systems, petroleum extraction platforms, kraft paper mills, and exhaled breath, but its determination at ppb levels remains a challenge within the analytical chemistry field. Off-line methods for analysis of gaseous reduced sulfur compounds can suffer from a variety of biases associated with high reactivity, sorptive losses, and atmospheric oxidative reactions. Here, we present a portable, on-line, and disposable gas sensor platform for the in situ determination of gaseous hydrogen sulfide, employing a 470 nm light emitting diode (LED) and a micro-fiber optic USB spectrometer...
November 3, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27786426/a-systematic-review-of-the-prevalence-of-comorbid-mental-health-disorders-in-people-presenting-for-substance-use-treatment-in-australia
#10
Rosemary E F Kingston, Christina Marel, Katherine L Mills
ISSUES: The aim of this paper was to conduct a systematic review of the prevalence of comorbid mental health conditions in people accessing treatment for substance use in Australia. APPROACH: A systematic review identified studies meeting the following eligibility criteria: reporting original data published in English; sample presenting for substance use treatment in Australia; assessing the prevalence of mental health and substance use conditions and reporting the percentage of participants with co-occurring mental health and substance use conditions...
October 27, 2016: Drug and Alcohol Review
https://www.readbyqxmd.com/read/27784576/optimization-of-photocatalytic-degradation-of-palm-oil-mill-effluent-in-uv-zno-system-based-on-response-surface-methodology
#11
Kim Hoong Ng, Yoke Wang Cheng, Maksudur R Khan, Chin Kui Cheng
This paper reports on the optimization of palm oil mill effluent (POME) degradation in a UV-activated-ZnO system based on central composite design (CCD) in response surface methodology (RSM). Three potential factors, viz. O2 flowrate (A), ZnO loading (B) and initial concentration of POME (C) were evaluated for the significance analysis using a 2(3) full factorial design before the optimization process. It is found that all the three main factors were significant, with contributions of 58.27% (A), 15.96% (B) and 13...
October 23, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27776239/removal-and-transformation-of-polycyclic-aromatic-hydrocarbons-during-electrocoagulation-treatment-of-an-industrial-wastewater
#12
Chenhao Gong, Gang Shen, Haiou Huang, Peiran He, Zhongguo Zhang, Baoqing Ma
Polycyclic aromatic hydrocarbons (PAHs) are an important class of water pollutants because of their known ecological and human toxicity. Electrocoagulation (EC) is a promising technology for mitigating industrial wastewater pollution, but the removal and transformation of PAHs during EC treatment has not yet been understood. Therefore, a paper-making wastewater effluent (PMWW) was employed in this study to investigate the relationship between PAHs' removal and transformation during EC treatment. The results show that 86% of PAHs were effectively removed not only by the electro-oxidation reactions, but also by adsorption onto Fe hydroxide flocs...
October 21, 2016: Chemosphere
https://www.readbyqxmd.com/read/27776232/removal-of-tricaine-methanesulfonate-from-aquaculture-wastewater-by-adsorption-onto-pyrolysed-paper-mill-sludge
#13
Catarina I A Ferreira, Vânia Calisto, Marta Otero, Helena Nadais, Valdemar I Esteves
Tricaine methanesulfonate (MS-222) has been widely used in intensive aquaculture systems to control stress during handling and confinement operations. This compound is dissolved in the water tanks and, once it is present in the Recirculating Aquaculture Systems (RASs), MS-222 can reach the environment by the discharge of contaminated effluents. The present work proposes the implementation of the adsorption process in the RASs, using pyrolysed biological paper mill sludge as adsorbent, to remove MS-222 from aquaculture wastewater...
October 21, 2016: Chemosphere
https://www.readbyqxmd.com/read/27770876/combined-effect-of-magnesia-and-zirconia-on-the-bioactivity-of-calcium-silicate-ceramics-at-c-s-ratio-less-than-unity
#14
Emad M M Ewais, Amira M M Amin, Yasser M Z Ahmed, Eman A Ashor, Ulrike Hess, Kurosch Rezwan
This paper describes the effect of magnesia in the presence of zirconia on the bioactivity, microstructure and physico-mechanical properties of calcium silicate composition adjusted at calcia/silica ratio(C/S) of 0.5. A mixture from calcium carbonate and silica was conducted at C/S of 0.5. 20wt.% of magnesia and 5-25wt.% of ZrO2 were added. Each mixture was mixed with ethanol in a planetary ball mill, dried, formed and fired at a temperature of 1325±5°C. Phase composition, FE-SEM, and physico-mechanical properties of the fired specimens were determined and explained...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27697321/biological-effects-of-gold-mine-tailings-on-the-intertidal-marine-environment-in-nova-scotia-canada
#15
K Doe, R Mroz, K-L Tay, J Burley, S Teh, S Chen
From 1861 to the 1940s, gold was produced from 64 mining districts in Nova Scotia, where mercury amalgamation was the dominant method for the extraction of gold from ore until the 1880s. As a result, wastes (tailings) from the milling process were contaminated by mercury and were high in naturally occurring arsenic. In 2004 and 2005, sediments, water and mollusc tissues were collected from 29 sampling stations at nine former gold mining areas along the Atlantic coastline and were analysed for arsenic and mercury...
October 1, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27695751/responses-of-reclamation-plants-to-high-root-zone-ph-effects-of-phosphorus-and-calcium-availability
#16
Wenqing Zhang, Janusz J Zwiazek
Low phosphorus (P) availability and high pH inhibit plant growth in calcareous soils and some oil sands reclamation sites in northeastern Alberta, Canada. In this study, we used a split-root hydroponic setup to test the effects of supplemental P with different calcium (Ca) concentrations and root-zone pH conditions on the growth and physiological response of trees commonly found in the region: paper birch ( Marsh.), trembling aspen ( Michx.), green alder [ (Chaix) DC.], and black spruce [ (Mill.) Britton, Sterns & Poggenb...
September 2016: Journal of Environmental Quality
https://www.readbyqxmd.com/read/27685964/characterization-of-dissolved-organic-matter-in-the-secondary-effluent-of-pulp-and-paper-mill-wastewater-before-and-after-coagulation-treatment
#17
Xiaolei Shi, Chunhua Xu, Hongying Hu, Fang Tang, Lijuan Sun
Meeting the regulatory discharge standards for pulp and paper mill wastewater has become ever more difficult because of its recalcitrant and colored dissolved organic matter (DOM). In this study, the variation of DOM from the secondary effluent of pulp and paper mill wastewater before and after coagulation was investigated based on hydrophobicity/hydrophilicity, apparent molecular weight (MW) and fluorescence. DOM fractions of the secondary effluent were all with the apparent MW <20 kDa. Particularly, the hydrophobic acids (HOA) fraction, mainly composed of humic-like materials, was the major component, and it also had the highest color and SUVA254 (UV254 to dissolved organic carbon ratio)...
September 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27684328/use-of-a-battery-of-chemical-and-ecotoxicological-methods-for-the-assessment-of-the-efficacy-of-wastewater-treatment-processes-to-remove-estrogenic-potency
#18
Nicola Beresford, Alice Baynes, Rakesh Kanda, Matthew R Mills, Karla Arias-Salazar, Terrence J Collins, Susan Jobling
Endocrine Disrupting Compounds pose a substantial risk to the aquatic environment. Ethinylestradiol (EE2) and estrone (E1) have recently been included in a watch list of environmental pollutants under the European Water Framework Directive. Municipal wastewater treatment plants are major contributors to the estrogenic potency of surface waters. Much of the estrogenic potency of wastewater treatment plant (WWTP) effluents can be attributed to the discharge of steroid estrogens including estradiol (E2), EE2 and E1 due to incomplete removal of these substances at the treatment plant...
September 11, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27681110/assessing-the-combination-of-iron-sulfate-and-organic-materials-as-amendment-for-an-arsenic-and-copper-contaminated-soil-a-chemical-and-ecotoxicological-approach
#19
Teresa Fresno, Eduardo Moreno-Jiménez, Jesús M Peñalosa
The efficiency of combining iron sulfate and organic amendments (paper mill sludge, olive mill waste compost and olive tree pruning biochar) for the remediation of an As- and Cu-contaminated soil was evaluated. Changes in As and Cu fractionation and solubility due to the application of the amendments was explored by leachate analysis, single and sequential extractions. Also, the effects on Arrhenatherum elatius growth, germination of Lactuca sativa and toxicity to the bacteria Vibrio fischeri were assessed...
December 2016: Chemosphere
https://www.readbyqxmd.com/read/27662860/a-review-of-the-texas-usa-san-jacinto-superfund-site-and-the-deposition-of-polychlorinated-dibenzo-p-dioxins-and-dibenzofurans-in-the-san-jacinto-river-and-houston-ship-channel
#20
Rupa Iyer, Juhi Aggarwal, Brian Iken
The San Jacinto River (SJR) waste pits that lie just under the 1-10 overpass in eastern Harris County east of Houston, Texas, USA, were created in the 1960s as dumping grounds for paper mill waste. The deposition of this waste led to accumulation of highly toxic polychlorinated dibenzo-p-dioxins and dibenzofurans (PCCDDs/PCDFs) over the course of several decades. After abandonment, the waste material eventually became submerged under the waters of the SJR, resulting in widespread environmental contamination that currently constitutes a significant health concern for eastern Harris County communities...
December 2016: Environmental Science and Pollution Research International
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