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https://www.readbyqxmd.com/read/29793207/infectivity-reduction-efficacy-of-uv-irradiation-and-peracetic-acid-uv-combined-treatment-on-ms2-bacteriophage-and-murine-norovirus-in-secondary-wastewater-effluent
#1
ShihChi Weng, Nathan Dunkin, Kellogg J Schwab, James McQuarrie, Kati Bell, Joseph G Jacangelo
Peracetic acid (PAA) is a strong oxidant/bactericide that has been applied in various industries (e.g., food processing, pharmaceuticals, medical device sterilization, etc.) as a disinfectant. There is increasing interest in using PAA for wastewater disinfection because it does not form halogenated byproducts, and no post-treatment quenching is required. Previous studies have demonstrated good efficiency in controlling bacteria in wastewater, but limited information is available for viruses, especially those hosted by mammals (e...
May 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29793203/chemical-speciation-and-risk-assessment-of-cadmium-in-soils-around-a-typical-coal-mining-area-of-china
#2
Siwei Cheng, Guijian Liu, Chuncai Zhou, Ruoyu Sun
The distribution characteristics of Cadmium (Cd) fractions in soils around a coal mining area of Huaibei coalfield were investigated, with the aim to assess its ecological risk. The total Cd concentrations in soils ranged from 0.05 to 0.87 mg/kg. The high percentage of phyto-available Cd (58%) when redox or base-acid equilibria changed. Soil pH was found to be a crucial factor affecting soil Cd fraction, and carbonate-bound Cd can be significantly affected by both organic matter and pH of soils. The static ecological evaluation models, including potential ecological risk index (PERI), geo-accumulation index (Igeo ) and risk assessment code (RAC), revealed a moderate soil Cd contamination and prensented high Cd exposure risk in studied soils...
May 21, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29793196/seasonal-cycles-of-secondary-organic-aerosol-tracers-in-rural-guangzhou-southern-china-the-importance-of-atmospheric-oxidants
#3
Qi Yuan, Senchao Lai, Junwei Song, Xiang Ding, Lishan Zheng, Xinming Wang, Yan Zhao, Junyu Zheng, Dingli Yue, Liuju Zhong, Xiaojun Niu, Yingyi Zhang
Thirteen secondary organic aerosol (SOA) tracers of isoprene (SOAI ), monoterpenes (SOAM ), sesquiterpenes (SOAS ) and aromatics (SOAA ) in fine particulate matter (PM2.5 ) were measured at a Pearl River Delta (PRD) regional site for one year. The characteristics including their seasonal cycles and the factors influencing their formation in this region were studied. The seasonal patterns of SOAI , SOAM and SOAS tracers were characterized over three enhancement periods in summer (I), autumn (II) and winter (III), while the elevations of SOAA tracer (i...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29793171/compositional-engineering-of-acceptors-for-highly-efficient-bulk-heterojunction-hybrid-organic-solar-cells
#4
S Amber Yousaf, M Ikram, S Ali
The wet chemical synthesis of chromium oxide (Cr2 O3 ) nanoparticles (NPs) and its application in active layer of inverted bulk heterojunction organic solar cells is documented in this research. Chromium oxide NPs of 10-30 nm size range having a band gap of 2.9 eV were successfully synthesized. These NPs were used in inverted organic solar cells in amalgamation with P3HT:PCBM and PTB7:PCBM polymers. The fabricated hybrid devices improves PCE significantly for P3HT:PCBM and PTB7:PCBM systems. The photophysical energy levels, optoelectrical properties and microscopic images have been systematically studied for the fabricated devices...
May 21, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793162/new-insights-into-the-formation-of-silver-based-nanoparticles-under-natural-and-semi-natural-conditions
#5
Andreas Wimmer, Anna Kalinnik, Michael Schuster
For the first time, the natural formation of silver-based nanoparticles (Ag-b-NPs) was studied in field investigations of two pre-alpine lakes in Germany that contain geogenic silver traces in the sub-ng L-1 range. Light-sensitive microorganisms most likely accumulate and transport these silver traces from deeper water layers to the surface. At the surface of the eutrophic lake, approximately 40% of total silver (5.7 ng L-1 ) consisted of Ag-b-NPs, whereas in the oligotrophic lake with similar enrichment of silver species, no Ag-b-NPs were detected...
May 10, 2018: Water Research
https://www.readbyqxmd.com/read/29793155/lessons-from-mosquitoes-painless-piercing
#6
Dev Gurera, Bharat Bhushan, Navin Kumar
Arthropods are the largest group of the living organisms. They attack other organisms by biting, stinging, or piercing and sucking. Among various medically important arthropods, which feed on living hosts, mosquitoes' piercing spread viruses which have been reported to cause the highest number of deaths annually. The primary cause of the deaths is malaria, which is spread by infected mosquitoes' piercing. This study aims at elucidating lessons from mosquitoes' painless piercing. Mosquitoes pierce using their fascicle, which is a bundle of coherently functioning six stylets...
May 18, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29793117/metagenomic-insights-into-the-microbiota-profiles-and-bioaugmentation-mechanism-of-organics-removal-in-coal-gasification-wastewater-in-an-anaerobic-anoxic-oxic-system-by-methanol
#7
Weichao Xu, Yuxiu Zhang, Hongbin Cao, Yuxing Sheng, Haibo Li, Yuping Li, He Zhao, Xuefei Gui
Coal gasification wastewater is a typical high phenol-containing, toxic and refractory industrial wastewater. Here, lab-scale anaerobic-anoxic-oxic system was employed to treat real coal gasification wastewater, and methanol was added to oxic tank as the co-substrate to enhance the removal of refractory organic pollutants. The results showed that the average COD removal in oxic effluent increased from 24.9% to 36.0% by adding methanol, the total phenols concentration decreased from 54.4 to 44.9 mg/L. GC-MS analysis revealed that contents of phenolic components and polycyclic aromatic hydrocarbons (PAHs) were decreased compared to the control and their degradation intermediates were observed...
May 18, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29793109/17%C3%AE-estradiol-as-precursors-of-cl-br-dbps-in-the-disinfection-process-of-different-water-samples
#8
Yanan Shao, Zihan Pan, Chuan Rong, Yinghui Wang, Hongxiang Zhu, Yuanyuan Zhang, Kefu Yu
During chlorine disinfection process, reactions between the disinfectant and 17β-estradiol (E2) lead to the formation of halogenated disinfection byproducts (DBPs) which can be a risk to both ecosystem and human health. The degradation and transformation products of E2 in sodium hypochlorite (NaClO) disinfection processes of different water samples were investigated. The reaction kinetics research showed that the degradation rates of E2 were considerably dependent on the initial pH value and the types of water samples...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29793107/biofiltration-of-methane-using-hybrid-mixtures-of-biochar-lava-rock-and-compost
#9
Helen La, J Patrick A Hettiaratchi, Gopal Achari, Tobin J Verbeke, Peter F Dunfield
Using hybrid packing materials in biofiltration systems takes advantage of both the inorganic and organic properties offered by the medium including structural stability and a source of available nutrients, respectively. In this study, hybrid mixtures of compost with either lava rock or biochar in four different mixture ratios were compared against 100% compost in a methane biofilter with active aeration at two ports along the height of the biofilter. Biochar outperformed lava rock as a packing material by providing the added benefit of participating in sorption reactions with CH4 ...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29793100/the-still-uncertain-identity-of-the-channel-forming-unit-s-of-the-mitochondrial-permeability-transition-pore
#10
REVIEW
Christopher P Baines, Manuel Gutiérrez-Aguilar
Mitochondria from different organisms can undergo a sudden process of inner membrane unselective leakiness to molecules known as the mitochondrial permeability transition (MPT). This process has been studied for nearly four decades and several proteins have been claimed to constitute, or at least regulate the usually inactive pore responsible for this transition. However, no protein candidate proposed as the actual pore-forming unit has passed rigorous gain- or loss-of-function genetic tests. Here we review evidence for -and against- putative channel-forming components of the MPT pore...
May 16, 2018: Cell Calcium
https://www.readbyqxmd.com/read/29793085/socio-demographic-factors-associated-with-choosing-violent-methods-of-suicide-2011-2016-ilam-province
#11
Yousef Veisani, Fathola Mohamadian, Ali Delpisheh, Salman Khazaei
BACKGROUND: In new strategies towards of suicide prevention the best approach currently is based on specific method had specific risk factors. Therefore in this study we aimed to find out the association between socio-demographic factors and methods in completed suicide, 2011-2016, Ilam province. METHODS: A cross-sectional study, 2011-2016, was conducted. A total of 540 completed suicides were recruited to the study. Data were collected by systematic registration suicide data (SRSD) and Legal Medicine Organization (LMO)...
May 21, 2018: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/29793069/a-2d-tank-test-on-remediation-of-nitrobenzene-contaminated-aquifer-using-in-situ-reactive-zone-with-emulsified-nanoscale-zero-valent-iron
#12
Jun Dong, Yang Dong, Chunyu Wen, Song Gao, Liming Ren, Qiburi Bao
Nitrobenzene (NB) is one of the most challenging pollutants for groundwater remediation due to its great harm and recalcitrance. Emulsified nanoscale zero-valent iron (EZVI) is considered as a promising agent for in-situ remediation of contaminated groundwater for its high reactivity, good durability and low cost. In this paper, 2D tank experiment was conducted to evaluate the effectiveness of enhanced remediation of NB-contaminated groundwater with EZVI. 9 L of EZVI solution was injected into aquifer to establish in-situ reactive zone (IRZ) before 40 d of NB contamination...
May 15, 2018: Chemosphere
https://www.readbyqxmd.com/read/29793030/sorption-of-perfluoroalkyl-substances-pfass-to-an-organic-soil-horizon-effect-of-cation-composition-and-ph
#13
Hugo Campos Pereira, Malin Ullberg, Dan Berggren Kleja, Jon Petter Gustafsson, Lutz Ahrens
Accurate prediction of the sorption of perfluoroalkyl substances (PFASs) in soils is essential for environmental risk assessment. We investigated the effect of solution pH and calculated soil organic matter (SOM) net charge on the sorption of 14 PFASs onto an organic soil as a function of pH and added concentrations of Al3+ , Ca2+ and Na+ . Often, the organic C-normalized partitioning coefficients (KOC ) showed a negative relationship to both pH (Δlog KOC /ΔpH = -0.32 ± 0.11 log units) and the SOM bulk net negative charge (Δlog KOC  = -1...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29793029/oxidative-degradation-of-atenolol-by-heat-activated-persulfate-kinetics-degradation-pathways-and-distribution-of-transformation-intermediates
#14
Dong Miao, Jianbiao Peng, Xiaohuan Zhou, Li Qian, Mengjie Wang, Li Zhai, Shixiang Gao
Atenolol (ATL) has been widely detected in wastewater and aquatic environment. Although satisfactory removal of ATL from wastewater could be achieved, the mineralization ratio is usually low, which may result in the accumulation of its transformation products in the effluent and cause additional ecological risk to the environment. The aim of this study is to explore the effectiveness of heat activated persulfate (PS) in the removal of ATL from wastewater. Influencing factors including temperature, PS dosage, solution pH, existence of NO3 - , Cl- , HCO3 - and Suwannee river fulvic acid (SRFA) were examined...
May 17, 2018: Chemosphere
https://www.readbyqxmd.com/read/29793026/redistribution-of-cs-137-introduced-into-montmorillonite-in-association-with-organic-matter-coming-from-biomass-composting
#15
J Mihalik, M J Madruga, M H Casimiro, L M Ferreira, M I Prudêncio
The adsorption and later bioavailability of 137 Cs from the system humic acid (HA)/humic acid like compounds (HALC) and montmorillonite was investigated. The setup of the experiments should approach as much as possible natural conditions when 137 Cs is introduced into soil with HALC from decomposed biomass. The significant differences were found in the trials containing various HA/HALC and also pure montmorillonite. The 137 Cs was more available when it reached soil in association with HALC originated from compost than when it was adsorbed on stable humic acids...
May 16, 2018: Chemosphere
https://www.readbyqxmd.com/read/29793001/health-literacy-in-chronic-disease-management-a-matter-of-interaction
#16
Iris van der Heide, Iraj Poureslami, Wayne Mitic, Jessica Shum, Irving Rootman, J Mark FitzGerald
Health literacy plays a crucial role in chronic disease management. To comprehensively manage chronic conditions on a daily basis, individuals must be able to assess, understand, evaluate and use health information. Several key publications emphasise that health literacy is not merely a matter of individual skills, but that it is highly dependent on the accessibility of healthcare systems, the communication skills of healthcare professionals, and the level of complexity of health information. However, the literature indicates that health literacy is mainly framed and measured as an individual attribute in research...
May 21, 2018: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/29792975/bladder-agenesis-and-associated-pelvic-arterial-anomaly-in-two-female-pediatric-patients
#17
Thomas Lowrey, Shellie Josephs, Linda A Baker
Bladder agenesis is an extremely rare congenital anomaly of the genitourinary tract. Two female patients with known diagnoses of bladder agenesis presented for pre-renal transplant evaluation and neobladder creation. Similar unique pelvic arterial malformations were identified through pre-operative imaging and intraoperative examination. With these similar findings, it could be proposed that such anatomical variants are products of the same insult or involve a causal relationship, with vascular aberrancies potentially provoking pelvic organ maldevelopment...
May 21, 2018: Urology
https://www.readbyqxmd.com/read/29792960/hybrid-chitosan-tio-2-zns-prepared-under-mild-conditions-with-visible-light-driven-photocatalytic-activity
#18
A Jbeli, A M Ferraria, A M Botelho do Rego, S Boufi, S Bouattour
Thin films of chitosan (CS) coated on glass substrates were used as support for the immobilization of nanostructures TiO2 /ZnS via a mild chemical process followed by a hydrothermal treatment at 90 °C. The preparation route involved the coating of the CS film on the glass substrate followed by the deposition of a thin layer of Ti(OBu)4 precursor and immersion in a solution of Zn(O2 CCH3 )2 and Na2 S. After a hydrothermal treatment at 90 °C, an even layer of TiO2 anatase decorated by ZnS nanorods was generated...
May 21, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29792950/transcriptome-profile-analysis-reveals-the-ontogenesis-of-rooted-chichi-in-ginkgo-biloba-l
#19
Xiaojing Liu, Limin Sun, Qikui Wu, Xiaoyan Men, Linmei Yao, Shiyan Xing
The Ginkgo biloba L. chichi is a unique organ. To explore the molecular mechanisms underlying the ontogenesis of G. biloba chichi, we used RNA-seq to analyse the transcriptome profile of rooted chichi at two developmental stages (ch1 and ch2) and nearby tissues (ck), and each sample had three biological replicates. A total of 57.74 Gb of clean bases were generated in nine cDNA libraries. These bases were de novo assembled into 68,277 unigenes with average length of 844 bp, and 51.47% of the unigenes had a match in at least one public database...
May 21, 2018: Gene
https://www.readbyqxmd.com/read/29792942/optimisation-of-decontamination-method-and-influence-of-culture-media-on-the-recovery-of-mycobacterium-avium-subspecies-paratuberculosis-from-spiked-water-sediments
#20
G Aboagye, M T Rowe
The recovery of Mycobacterium avium subspecies paratuberculosis (Map) from the environment can be a laborious process - owing to Map being fastidious, its low number, and also high numbers of other microbial populations in such settings. Protocols i.e. filtration, decontamination and modified elution were devised to recover Map from spiked water sediments. Three culture media: Herrold's Egg Yolk Media (HEYM), Middlebrook 7H10 (M-7H10) and Bactec 12B were then employed to grow the organism following its elution...
May 21, 2018: Journal of Microbiological Methods
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