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https://www.readbyqxmd.com/read/28647320/an-integrated-aerobic-anaerobic-strategy-for-performance-enhancement-of-pseudomonas-aeruginosa-inoculated-microbial-fuel-cell
#1
Xiao-Yu Yong, Zhi-Ying Yan, Hai-Bo Shen, Jun Zhou, Xia-Yuan Wu, Li-Juan Zhang, Tao Zheng, Min Jiang, Ping Wei, Hong-Hua Jia, Yang-Chun Yong
Microbial fuel cell (MFC) is a promising device for energy generation and organic waste treatment simultaneously by electrochemically active bacteria (EAB). In this study, an integrated aerobic-anaerobic strategy was developed to improve the performance of P. aeruginosa-inoculated MFC. With an aerobic start-up and following an anaerobic discharge process, the current density of MFC reached a maximum of 99.80µA/cm(2), which was 91.6% higher than the MFC with conventional constant-anaerobic operation. Cyclic voltammetry and HPLC analysis showed that aerobic start-up significantly increased electron shuttle (pyocyanin) production (76% higher than the constant-anaerobic MFC)...
June 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28646519/the-association-of-health-literacy-with-preventable-ed-visits-a-cross-sectional-study
#2
Meenakshi P Balakrishnan, Jill Boylston Herndon, Jingnan Zhang, Thomas Payton, Jonathan Shuster, Donna L Carden
BACKGROUND: Policy-makers argue that emergency department (ED) visits for conditions preventable with high-quality outpatient care contribute to waste in the healthcare system. However, access to ambulatory care is uneven, especially for vulnerable populations like minorities, the poor and those with limited health literacy. The impact of limited health literacy on ED visits that are preventable with timely, high-quality ambulatory care is unknown. OBJECTIVE: To determine the association of health literacy and preventable ED visits...
June 24, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28642517/green-dentistry-the-art-and-science-of-sustainable-practice
#3
P Mulimani
Dentistry is highly energy and resource intensive with significant environmental impact. Factors inherent in the profession such as enormous electricity demands of electronic dental equipment, voluminous water requirements, environmental effects of biomaterials (before, during and after clinical use), the use of radiation and the generation of hazardous waste involving mercury, lead etc have contributed towards this. With rising temperatures across the world due to global warming, efforts are being made worldwide to mitigate the effects of environmental damage by resorting to sustainability concepts and green solutions in a myriad of ways...
June 23, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28639437/ultrasound-assisted-green-economic-synthesis-of-hydroxyapatite-nanoparticles-using-eggshell-bio-waste-and-study-of-mechanical-and-biological-properties-for-orthopaedic-applications
#4
Vijay H Ingole, Kamal Hany Hussein, Anil A Kashale, Kalyani Ghule, Tomaž Vuherer, Vanja Kokol, Jia-Yaw Chang, Yong-Chien Ling, Aruna Vinchurkar, Hom N Dhakal, Anil V Ghule
Nanostructured hydroxyapatite (HAp) is most favorable candidate biomaterial for bone tissue engineering because of its bioactive and osteoconductive properties. Herein, we report for the first time ultrasound assisted facile and economic approach for the synthesis of nanocrystalline hydroxyapatite (Ca10 (PO4 )6 (OH)2 ) using recycled eggshell bio-waste referred as EHAp. The process involves the reaction of eggshell bio-waste as a source of calcium and ammonium dihydrogen orthophosphate as a phosphate source...
June 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28636053/evidence-of-bad-recycling-practices-bfrs-in-children-s-toys-and-food-contact-articles
#5
A Guzzonato, F Puype, S J Harrad
Brominated flame retardants (BFRs) have been used intentionally in a wide range of plastics, but are now found in an even wider range of such materials (including children's toys and food contact articles) as a result of recycling practices that mix BFR-containing waste plastics with "virgin" materials. In this study Br was quantified in toy and food contact samples on the assumption that its concentration can be used as a metric for BFR contamination. Subsequently, compound specific determination of BFRs was performed to evaluate the validity of the aforementioned assumption, crucial to render rapid, inexpensive, in situ Br determination in non-laboratory environments (such as waste handling facilities) a viable option for sorting wastes according to their BFR content...
June 21, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28633861/optimization-of-magnetic-field-assisted-ultrasonication-for-the-disintegration-of-waste-activated-sludge-using-box-behnken-design-with-response-surface-methodology
#6
Su Guan, Feng Deng, Si-Qi Huang, Shu-Yang Liu, Le-Xian Ai, Pu-Ying She
This study investigated for the first time the feasibility of using a magnetic field for sludge disintegration. Approximately 41.01% disintegration degree (DD) was reached after 30min at 180mT magnetic field intensity upon separate magnetic field treatment. Protein and polysaccharide contents significantly increased. This test was optimized using a Box-Behnken design (BBD) with response surface methodology (RSM) to fit the multiple equation of the DD. The maximum DD was 43.75% and the protein and polysaccharide contents increased to 56...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28625985/periplasmic-nicotine-dehydrogenase-ndhab-utilizes-pseudoazurin-as-its-physiological-electron-acceptor-in-agrobacterium-tumefaciens-s33
#7
Wenjun Yu, Rongshui Wang, Haiyan Huang, Huijun Xie, Shuning Wang
Agrobacterium tumefaciens S33 can grow with nicotine as the sole source of carbon, nitrogen, and energy via a novel hybrid of the pyridine pathway and the pyrollidine pathway. Characterization of the enzymes involved in the hybrid pathway is important for understanding its biochemical mechanism. Here we report that the molybdenum-containing nicotine dehydrogenase (NdhAB), which catalyzes the initial step of nicotine degradation, is located in the periplasm of strain S33, while the 6-hydroxynicotine oxidase and 6-hydroxypseudooxynicoine oxidase are in the cytoplasm...
June 16, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28623924/in-vitro-physiological-and-antibacterial-characterization-of-zno-nanoparticle-composites-in-simulated-porcine-gastric-and-enteric-fluids
#8
Marina S R Barreto, Cristina T Andrade, Luiz Cláudio R P da Silva, Lúcio M Cabral, Vânia M Flosi Paschoalin, Eduardo M Del Aguila
BACKGROUND: Diarrhea in piglets is one of the main causes of animal death after weaning; zinc oxide (ZnO) has been used in high doses for the control of this sickness. The aim of this study was to determine the physicochemical properties of ZnO nanoparticles synthesized and immobilized on a chitosan/alginate (CH/SA) complex and investigate the antimicrobial activity and in vitro release profile of zinc (Zn(2+)) from these new compounds. The ZnO nanoparticles composites were prepared and combined with CH/SA or CH/SA and sodium tripolyphosphate (TPP)...
June 17, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28623821/green-biosynthesis-of-magnetic-iron-oxide-fe3o4-nanoparticles-using-the-aqueous-extracts-of-food-processing-wastes-under-photo-catalyzed-condition-and-investigation-of-their-antimicrobial-and-antioxidant-activity
#9
Jayanta Kumar Patra, Kwang-Hyun Baek
In this study, a simple, rapid, and eco-friendly green method was introduced to synthesize magnetite iron oxide nanoparticles (Fe3O4 NPs) using the aqueous extracts of two food processing wastes, namely silky hairs of corn (Zea mays L.) and outer leaves of Chinese cabbage (Brassica rapa L. subsp. pekinensis). The boiled solutions of silky hairs (MH) and outer leaves of Chinese cabbage (CCP) were used to synthesize Fe3O4 NPs under photo exposed condition. The MH-FeNPs and CCP-FeNPs synthesized via green route were characterized by UV-Vis spectroscopy, field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential thermogravimetric (TG/DTG) analysis, and vibrating sample magnetometer (VSM) analysis...
June 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28623427/blood-concentrations-of-lead-cadmium-mercury-and-their-association-with-biomarkers-of-dna-oxidative-damage-in-preschool-children-living-in-an-e-waste-recycling-area
#10
Xijin Xu, Weitang Liao, Yucong Lin, Yifeng Dai, Zhihua Shi, Xia Huo
Reactive oxygen species (ROS)-induced DNA damage occurs in heavy metal exposure, but the simultaneous effect on DNA repair is unknown. We investigated the influence of co-exposure of lead (Pb), cadmium (Cd), and mercury (Hg) on 8-hydroxydeoxyguanosine (8-OHdG) and human repair enzyme 8-oxoguanine DNA glycosylase (hOGG1) mRNA levels in exposed children to evaluate the imbalance of DNA damage and repair. Children within the age range of 3-6 years from a primitive electronic waste (e-waste) recycling town were chosen as participants to represent a heavy metal-exposed population...
June 16, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28622639/an-investigation-into-the-rapid-removal-of-tetracycline-using-multilayered-graphene-phase-biochar-derived-from-waste-chicken-feather
#11
Huiqin Li, Jingtao Hu, Yue Meng, Jinhua Su, Xiaojing Wang
This study investigated the removal of tetracycline (TC) using multilayered graphene-phase biochar (MGB) derived from waste chicken feather. MGB was produced through a two-stage carbonization and KOH-activation method. MGB was characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier transform infrared (FT-IR), Raman spectra, Zeta potential and elemental analysis. Various chemical functional groups were demonstrated on the surface of MGB. MGB was featured by a very large BET surface area of 1838m(2)/g...
June 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28621761/production-of-chitin-from-penaeus-vannamei-by-products-to-pilot-plant-scale-using-a-combination-of-enzymatic-and-chemical-processes-and-subsequent-optimization-of-the-chemical-production-of-chitosan-by-response-surface-methodology
#12
José A Vázquez, Patrícia Ramos, Jesús Mirón, Jesus Valcarcel, Carmen G Sotelo, Ricardo I Pérez-Martín
The waste generated from shrimp processing contains valuable materials such as protein, carotenoids, and chitin. The present study describes a process at pilot plant scale to recover chitin from the cephalothorax of Penaeus vannamei using mild conditions. The application of a sequential enzymatic-acid-alkaline treatment yields 30% chitin of comparable purity to commercial sources. Effluents from the process are rich in protein and astaxanthin, and represent inputs for further by-product recovery. As a last step, chitin is deacetylated to produce chitosan; the optimal conditions are established by applying a response surface methodology (RSM)...
June 16, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28618230/anti-mosquito-activity-of-a-titanium-organic-framework-supported-on-fabrics
#13
Reda M Abdelhameed, Omnia M H M Kamel, A Amr, Joao Rocha, Artur M S Silva
Waste swamps, stagnant water and poor hygiene practices result in the proliferation of mosquitoes that may cause transmissible and infectious diseases, such as malaria, typhoid, cholera, and Zikavirus sickness. Composites of the traditional natural fibres cotton, viscose and linen, and a Ti-bearing metal-organic framework, NH2-MIL-125, is very effective against mosquitoes, in the absence of any conventional insecticides. Prior to coating with NH2-MIL-125 crystals, the fabrics have been modified with 3-glycidyloxypropyltrimethoxysilane...
June 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28615871/morphometric-and-scanning-electron-microscopy-based-identification-of-ancylostoma-caninum-parasites-in-dog
#14
Harsimarandeep Singh Uppal, Mandeep Singh Bal, L D Singla, Paramjit Kaur, B S Sandhu
Ancylostoma caninum, a blood feeding nematode parasite (Family: Ancylostomatidae, Superfamily: Ancylostomatoidea) can cause anaemia, dark reddish-brown to black haemorrhagic diarrhoea, dehydration, wasting and deaths due to heavy blood loss. Adult hook worm parasites recovered from the intestine of a stray dog at the time of necropsy were identified as A. caninum based on morphological characters and morphometric observations involving scanning electron microscopy (SEM). Different developmental stages of hookworm eggs viz...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28613435/environmentally-benign-rapid-and-selective-extraction-of-gold-from-ores-and-waste-electronic-materials
#15
Peng Yang, Chunlin Yue, Huaming Sun, Wen-Jing Liu, Xudong Deng, Binbin Guan Guan, Xu Zhang
The extraction of gold from ores and electronic waste is an important topic worldwide, as this precious metal has immense value in a variety of fields. However, serious environmental pollution and high energy consumption due to the use of toxic oxidation reagents and harsh reaction conditions is a well-known problem in the gold industry. Herein, we report a new chemical method based on the combined use of N-bromosuccinimide (NBS) and pyridine (Py), which has a greatly decreased environmental impact and reagent cost, as well as mild reaction requirements...
June 14, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28609845/-away-is-a-place-the-impact-of-electronic-waste-recycling-on-blood-lead-levels-in-ghana
#16
Ebenezer Forkuo Amankwaa, Kwame A Adovor Tsikudo, John Bowman
E-waste recycling remains a major source of livelihood for many urban poor in developing countries, but this economic activity is fraught with significant environmental health risk. Yet, human exposure to the toxic elements associated with e-waste activities remains understudied and not evidently understood. This study investigates the impact of informal e-waste processing on the blood lead levels (BLLs) of e-waste workers and non-e-waste workers (mainly females working in activities that serve the Agbogbloshie e-waste site), and relates their lead exposure to socio-demographic and occupational characteristics...
June 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28606066/treatment-outcome-of-children-with-persistent-diarrhoea-admitted-to-an-urban-hospital-dhaka-during-2012-2013
#17
Mustafa Mahfuz, Mohammed Ashraful Alam, Shoeb Bin Islam, Nurun Nahar Naila, Mohammod Jobayer Chisti, Nur Haque Alam, Shafiqul Alam Sarker, Tahmeed Ahmed
BACKGROUND: Despite availability of treatment guidelines, persistent diarrhoea (PD) has been a major contributor of diarrhoeal deaths in low and middle income countries. We evaluated the outcome of children under the age of 5 years who were treated for PD using management algorithm with locally available foods in a diarrhoeal disease hospital in Dhaka. METHODS: We extracted retrospective data from electronic database for all the under-five children admitted for PD in the Longer Stay Ward and Intensive Care Unit of the Dhaka hospital at icddr,b between 2012 and 2013...
June 12, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28605988/effect-of-curing-time-on-selected-properties-of-soil-stabilized-with-fly-ash-marble-dust-and-waste-sand-for-road-sub-base-materials
#18
Seyhan Firat, Jamal M Khatib, Gulgun Yilmaz, A T Comert
The properties of sub-base filling materials in highway construction are essential, as they can determine the performance of the road in service. Normally, the existing materials are removed and replaced with new materials that have adequate load-bearing capacity. Rising environmental concern and new environmental legislations have made construction professionals consider other methods. These methods include stabilizing the existing materials with other additives to improve their performance. Additives can be waste materials generated by different industries...
June 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28605837/from-waste-plastics-to-industrial-raw-materials-a-life-cycle-assessment-of-mechanical-plastic-recycling-practice-based-on-a-real-world-case-study
#19
Fu Gu, Jianfeng Guo, Wujie Zhang, Peter A Summers, Philip Hall
Mechanical recycling of waste plastics is an environmental solution to the problem of waste plastic disposal, and has already become a common practice in industry. However, limited information can be found on either the industralised plastic recycling or the recycled materials, despite the use of recycled plastics has already extended to automobile production. This study investigates the life cycle environmental impacts of mechanical plastic recycling practice of a plastic recycling company in China. Waste plastics from various sources, such as agricultural wastes, plastic product manufacturers, collected solid plastic wastes and parts dismantled from waste electric and electronic equipments, are processed in three routes with products end up in different markets...
June 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28600560/enhanced-photocatalytic-activity-of-ws2-film-by-laser-drilling-to-produce-porous-ws2-wo3-heterostructure
#20
Sainan Ma, Longlui Zeng, Lili Tao, Chun Yin Tang, Huiyu Yuan, Hui Long, Ping Kwong Cheng, Yang Chai, Chuansheng Chen, Kin Hung Fung, Xuming Zhang, Shu Ping Lau, Yuen Hong Tsang
Methods and mechanisms for improvement of photocatalytic activity, are important and popular research topics for renewable energy production and waste water treatment. Here, we demonstrate a facile laser drilling method for engineering well-aligned pore arrays on magnetron-sputtered WS2 nanofilms with increased active edge sites; the proposed method promotes partial oxidation to fabricate WS2/WO3 heterojunctions that enhance the separation of photogenerated electron-hole pairs. The WS2 film after one, two, and three treatments exhibited photocurrent density of 3...
June 9, 2017: Scientific Reports
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