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https://www.readbyqxmd.com/read/28527415/trace-bromide-ion-impurity-leads-to-formation-of-chlorobromoaromatic-by-products-in-peroxymonosulfate-based-oxidation-of-chlorophenols
#1
Changling Fang, Zhaohui Wang, Min Feng, Ying Huang, Fei Yang, Jianshe Liu
Trace bromide (Br(-)) released from industrial effluents or brominated compounds is able to directly react with peroxymonosulfate (PMS) to generate a series of reactive oxidants which can oxidize and also halogenate organics. We report the identification and evolution of by-products during 2,4,6-trichlorophenol (TCP) degradation in the presence of PMS and trace Br(-). The influencing factors, including Br(-) concentration and pH, were investigated. The depletion of TCP was accelerated with increasing trace Br(-) concentration (0-0...
May 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28525879/application-of-calcium-peroxide-in-water-and-soil-treatment-a-review
#2
REVIEW
Shuguang Lu, Xiang Zhang, Yunfei Xue
Calcium peroxide (CP) has been progressively applied in terms of environmental protection due to its certain physical and chemical properties. This review focuses on the latest progresses in the applications of CP in water and soil treatment, including wastewater treatment, surface water restoration and groundwater and soil remediation. The stability of CP makes it an effective solid phase to supply H2O2 and O2 for aerobic biodegradation and chemical degradation of contaminants in water and soil. CP has exerted great performance in the removal of dyes, chlorinated hydrocarbons, petroleum hydrocarbons, pesticides, heavy metals and various other contaminants...
May 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28523101/design-and-synthesis-of-potent-and-selective-pim-kinase-inhibitors-by-targeting-unique-structure-of-atp-binding-pocket
#3
Hirofumi Nakano, Tsukasa Hasegawa, Hirotatsu Kojima, Takayoshi Okabe, Tetsuo Nagano
In the development of kinase inhibitors, one of the major concerns is selectivity. An effective strategy to achieve high selectivity is to utilize structural differences among kinases to inform inhibitor design. Here, we set out to improve the PIM (proviral integration site for Moloney murine leukemia virus) kinase-inhibitory selectivity of our previously reported 7-azaindole derivative 2, which has promising ADMET properties, by targeting a unique bulge in the ATP-binding pocket. 6-Substituted 7-azaindoles, especially the 6-chlorinated derivatives, proved to be potent and selective PIM kinase inhibitors and appear to be promising lead compounds for future drug discovery...
May 11, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28520711/inhalational-chlorine-injuries-at-public-aquatic-venues-california-2008-2015
#4
Jason A Wilken, Michele DiMaggio, Matthew Kaufmann, Kevin O'Connor, Svetlana Smorodinsky, Christina Armatas, Tracy Barreau, Richard Kreutzer, Lino Ancheta
In June 2015, personnel from California's Contra Costa Health Services Environmental Health and Hazardous Materials (hazmat) divisions were alerted to a possible chemical release at a swimming pool in an outdoor municipal water park. Approximately 50 bathers were in the pool when symptoms began; 34 (68%) experienced vomiting, coughing, or eye irritation. Among these persons, 17 (50%) were treated at the scene by Contra Costa's Emergency Medical Services (EMS) and released, and 17 (50%) were transported to local emergency departments; five patients also were evaluated later at an emergency department or by a primary medical provider...
May 19, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28516773/amphiphilic-bodipy-hydroporphyrin-energy-transfer-arrays-with-broadly-tunable-absorption-and-deep-red-near-infrared-emission-in-aqueous-micelles
#5
Adam Meares, Andrius Satraitis, Joshua Akhigbe, Nithya Santhanam, Subramani Swaminathan, Melanie Ehudin, Marcin Ptaszek
BODIPY-hydroporphyrin energy transfer arrays allow for development of family of fluorophores featuring a common excitation band at 500 nm, tunable excitation band in deep red/near-infrared window, and tunable emission. Their biomedical applications are contingent upon retaining their optical properties in aqueous environment. Amphiphilic arrays containing PEG-substituted BODIPY and chlorins or bacteriochlorins were prepared and their optical and fluorescence properties were determined in organic solvents and aqueous surfactants...
May 18, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28516730/control-of-pseudomonas-mastitis-on-a-large-dairy-farm-by-using-slightly-acidic-electrolyzed-water
#6
Kazuhiro Kawai, Yasunori Shinozuka, Ikuo Uchida, Kazuhiko Hirose, Takashi Mitamura, Aiko Watanabe, Kana Kuruhara, Reiko Yuasa, Reiichiro Sato, Ken Onda, Hajime Nagahata
The disinfection effect of slightly acidic electrolyzed water (SAEW) use in a farm where Pseudomonas mastitis has spread was evaluated. Despite the application of antibiotic therapy and complete cessation of milking infected quarters, numerous new and recurrent Pseudomonas aeruginosa clinical mastitis infections (5.8-7.1% of clinical mastitis cases) occurred on the farm from 2003 to 2005. Procedural changes and equipment modifications did not improve environmental contamination or the incidence of Pseudomonas mastitis...
May 18, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28515629/microbial-competition-in-environmental-nosocomial-reservoirs-and-diffusion-capacity-of-oxa48-klebsiella-pneumoniae-potential-impact-on-patients-and-possible-control-methods
#7
REVIEW
R Herruzo, G Ruiz, M J Vizcaino, L Rivas, V Pérez-Blanco, M Sanchez
BACKGROUND: We have found clusters of Klebsiella pneumoniae with OXA48-carbepenemase cases in some hospital rooms, and decided to investigate whether bathroom siphons could be a reservoir for OXA48 bacteria, as occurs with K. oxytoca with other types of carbepenemases. METHODS: We evaluated the microbial competition between strains with OXA48 and VIM carbepenemases, in diluted nutrient-broth, on a slime germ-carrier. We compared the number of colonies at 5 and 10 days on the contaminated carriers with one or two strains...
March 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28514839/occurrence-of-brominated-dioxins-in-a-study-using-various-firefighting-methods
#8
Filip Bjurlid, Anna Kärrman, Niklas Ricklund, Jessika Hagberg
The use of different firefighting methods influences how fast a fire is extinguished and how fast the temperature drops in the area affected by the fire. These differences may also influence the formation of harmful pollutants during firefighting of an accidental fire. The aim was to study occurrence of brominated dibenzo-p-dioxins and furans (PBDD/Fs) in gas and soot during five fire scenarios resembling a small apartment fire and where different firefighting methods were used. Samples of gas and soot were taken both during the buildup of the fire and during the subsequent extinguishing of the fire while using different firefighting methods (nozzle, compressed air foam system, cutting extinguisher) and an extinguishing additive...
May 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28513647/if5-affects-the-final-stage-of-the-cl-f-exchange-fluorination-in-the-synthesis-of-pentafluoro-%C3%AE-6-sulfanyl-pyridines-pyrimidines-and-benzenes-with-electron-withdrawing-substituents
#9
Benqiang Cui, Mikhail Kosobokov, Kohei Matsuzaki, Etsuko Tokunaga, Norio Shibata
A difficult chlorine-fluorine (Cl-F) exchange fluorination reaction in the final stage of the preparation of pentafluoro-λ(6)-sulfanyl-(hetero)arenes having electron-withdrawing substituents has now been elucidated through the use of iodine pentafluoride. A major side-reaction of C-S bond cleavage was sufficiently inhibited by the potential interaction between F and I with a halogen bonding.
May 17, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28512715/management-of-rainwater-harvesting-and-its-impact-on-the-health-of-people-in-the-middle-east-case-study-from-yatta-town-palestine
#10
Ilke Celik, Lina M A Tamimi, Issam A Al-Khatib, Defne S Apul
Water-related diseases are a primary problem in Palestine where many residents revert to harvested rainwater as their primary water source due to water shortages within the area. From an environmental engineering perspective, it is already well known that certain situations (e.g., cross contamination) reduce drinking water quality and ultimately cause diseases in a population. In this study, we investigated the social practices and situations that may lead to lower disease occurrence. Towards this goal, we surveyed 382 residents in Yatta to collect data on the water-related diseases that they experienced and the specific situations that might affect the disease occurrences such as the residents' practices (i) for maintaining a high quality of cistern water, (ii) for maintaining the environment around the cistern, and (iii) for managing the wastewater...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28510766/detection-of-3-3-dichlorobiphenyl-in-human-maternal-plasma-and-its-effects-on-axonal-and-dendritic-growth-in-primary-rat-neurons
#11
Sunjay Sethi, Kimberly P Keil, Hao Chen, Keri Hayakawa, Xueshu Li, Yanping Lin, Hans-Joachim Lehmler, Birgit Puschner, Pamela J Lein
3,3'-Dichlorobiphenyl (PCB 11), a byproduct of pigment production, is increasingly detected in environmental samples. While more highly chlorinated PCB congeners are known developmental neurotoxicants, nothing is known about the potential developmental neurotoxicity of PCB 11. To address this critical data gap, we measured PCB 11 levels in human maternal plasma and quantified the effects of PCB 11 and its major metabolites on morphometric parameters of neuronal connectivity in cultured primary neurons. Mass spectrometry analyses of plasma from 241 pregnant women enrolled in the MARBLES study (University of California, Davis) detected PCB 11 in all samples at concentrations ranging from 0...
May 16, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28508904/chloride-accelerated-cu-fenton-chemistry-for-biofilm-removal
#12
Li Wang, Yanni Miao, Mingsheng Lu, Zhi Shan, Shan Lu, Jiaojiao Hou, Qiumei Yang, Xinle Liang, Tao Zhou, Dennis Curry, Ken Oakes, Xu Zhang
Biofilms present challenges to numerous industries. Herein, a simple approach was developed based on chloride-accelerated Fenton chemistry, where copper oxide nanoparticles facilitate efficient generation of reactive chlorine species for biofilm removal.
May 16, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28508523/the-effect-of-sodium-hypochlorite-concentration-and-irrigation-needle-extension-on-biofilm-removal-from-a-simulated-root-canal-model
#13
Saifalarab A Mohmmed, Morgana E Vianna, Matthew R Penny, Stephen T Hilton, Jonathan C Knowles
To investigate the effect of sodium hypochlorite concentration and needle extension on removal of Enterococcus faecalis biofilm, sixty root canal models were 3D printed. Biofilms were grown on the apical 3 mm of the canal for 10 days. Irrigation for 60s with 9 mL of either 5.25% or 2.5% NaOCl or water was performed using a needle inserted either 3 or 2 mm from the canal terminus and imaged using fluorescence microscopy and residual biofilm percentages were calculated using imaging software. The data were analysed using analysis of covariance and two-sample t-tests...
May 16, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28508082/a-chlorine-free-protocol-for-processing-germanium
#14
Martin Glavinović, Michael Krause, Linju Yang, John A McLeod, Lijia Liu, Kim M Baines, Tomislav Friščić, Jean-Philip Lumb
Replacing molecular chlorine and hydrochloric acid with less energy- and risk-intensive reagents would markedly improve the environmental impact of metal manufacturing at a time when demand for metals is rapidly increasing. We describe a recyclable quinone/catechol redox platform that provides an innovative replacement for elemental chlorine and hydrochloric acid in the conversion of either germanium metal or germanium dioxide to a germanium tetrachloride substitute. Germanium is classified as a "critical" element based on its high dispersion in the environment, growing demand, and lack of suitable substitutes...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28508000/knowledge-and-attitude-of-iranian-red-crescent-society-volunteers-in-dealing-with-chemical-attacks
#15
Maryam Nadjafi, Siavash Hamzeh Pour
OBJECTIVE: To evaluate the knowledge, attitude, and preparedness of Mahabad Red Crescent Society volunteers in dealing with chemical attacks. METHODS: This prospective cross-sectional study was conducted on 120 Red Crescent Society volunteers in Mahabad City, Iran, during 2014-2015.The knowledge of the volunteers was evaluated and rated using a questionnaire as poor, moderate, and good. Also, the attitude of the volunteers towards the chemical attacks and their preparedness were rated as appropriate and inappropriate using a questionnaire...
April 2017: Bulletin of Emergency and Trauma
https://www.readbyqxmd.com/read/28506034/occurrence-of-cryptosporidium-and-giardia-and-the-relationship-between-protozoa-and-water-quality-indicators-in-swimming-pools
#16
Shumin Xiao, Pengna Yin, Yan Zhang, Sike Hu
A total of 60 samples were collected from 35 swimming pools in Beijing, China, and the presence of Cryptosporidium and Giardia were investigated. The results showed that 16.7% and 15.0% of samples were positive for Cryptosporidium oocyst and Giardia cysts, respectively, with a mean concentration of 0.30 oocysts/10 L and 0.27 cysts/10 L. The oocysts and cysts were found to have higher rates of occurrence in August than in May. Genotyping confirmed the presence of Cryptosporidium hominis, C. parvum, and Giardia assemblages A and B, all of which were associated with human infections...
April 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28505113/evaluation-of-efficient-and-practical-methods-for-the-preparation-of-functionalized-aliphatic-trifluoromethyl-ethers
#17
Taras M Sokolenko, Maya I Dronkina, Emmanuel Magnier, Lev M Yagupolskii, Yurii L Yagupolskii
The "chlorination/fluorination" technique for aliphatic trifluoromethyl ether synthesis was investigated and a range of products with various functional groups was prepared. The results were compared with oxidative desulfurization-fluorination of xanthates with the same structure.
May 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28504881/compartmentalization-technologies-via-self-assembly-and-cross-linking-of-amphiphilic-random-block-copolymers-in-water
#18
Mayuko Matsumoto, Takaya Terashima, Kazuma Matsumoto, Mikihito Takenaka, Mitsuo Sawamoto
Orthogonal self-assembly and intramolecular cross-linking of amphiphilic random block copolymers in water afforded an approach to tailor-make well-defined compartments and domains in single polymer chains and nanoaggregates. For a double compartment single-chain polymer, an amphiphilic random block copolymer bearing hydrophilic poly(ethylene glycol) (PEG) and hydrophobic dodecyl, benzyl, and olefin pendants was synthesized by living radical polymerization (LRP) and postfunctionalization; the dodecyl and benzyl units were incorporated into the different block segments, whereas PEG pendants were statistically attached along a chain...
May 19, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28503718/photodithazine-photodynamic-effect-on-viability-of-9l-lacz-gliosarcoma-cell-line
#19
Leticia C Fontana, Juliana G Pinto, André H C Pereira, Cristina P Soares, Leandro J Raniero, Juliana Ferreira-Strixino
Even with the advances of conventional treatment techniques, the nervous system cancer prognosis is still not favorable to the patient which makes alternative therapies needed to be studied. Photodynamic therapy (PDT) is presented as a promising therapy, which employs a photosensitive (PS) agent, light wavelength suitable for the PS agent, and molecular oxygen, producing reactive oxygen species in order to induce cell death. The aim of this study is to observe the PDT action in gliosarcoma cell using a chlorin (Photodithazine, PDZ)...
May 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28502601/recycling-of-spent-lithium-ion-battery-with-polyvinyl-chloride-by-mechanochemical-process
#20
Meng-Meng Wang, Cong-Cong Zhang, Fu-Shen Zhang
In the present study, cathode materials (C/LiCoO2) of spent lithium-ion batteries (LIBs) and waste polyvinyl chloride (PVC) were co-processed via an innovative mechanochemical method, i.e. LiCoO2/PVC/Fe was co-grinded followed by water-leaching. This procedure generated recoverable LiCl from Li by the dechlorination of PVC and also generated magnetic CoFe4O6 from Co. The effects of different additives (e.g. alkali metals, non-metal oxides, and zero-valent metals) on (i) the conversion rates of Li and Co and (ii) the dechlorination rate of PVC were investigated, and the reaction mechanisms were explored...
May 11, 2017: Waste Management
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