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https://www.readbyqxmd.com/read/27933257/assessment-of-the-quality-of-groundwater-for-drinking-purposes-in-the-upper-west-and-northern-regions-of-ghana
#1
Sixtus Bieranye Bayaa Martin Saana, Samuel Asiedu Fosu, Godfred Etsey Sebiawu, Napoleon Jackson, Thomas Karikari
BACKGROUND: Underground water is an important natural resource serving as a reliable source of drinking water for many people worldwide, especially in developing countries. Underground water quality needs to be given a primary research and quality control attention due to possible contamination. This study was therefore designed to determine the physico-chemical and bacteriological quality of borehole water in the Upper West and Northern regions of Ghana. METHODS: The study was conducted in seven districts in Ghana (including six in the Upper West region and one in the Northern region)...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27931767/blood-and-urinary-levels-of-metals-and-metalloids-in-the-general-adult-population-of-northern-france-the-imepoge-study-2008-2010
#2
Catherine Nisse, Romuald Tagne-Fotso, Mike Howsam, Camille Richeval, Laurence Labat, Ariane Leroyer
BACKGROUND: The assessment of human chemical risks related to occupational or environmental exposure to pollutants requires the use of both accurate exposure indicators and reference values. The objective of this study was to evaluate the blood and urinary levels of various metals and metalloids in a sample of adults aged 20-59 years of the general population of Northern France, a formerly heavily industrialised area that retains some industrial activity. METHODS: A cross-sectional study was conducted between 2008 and 2010, enrolling 2000 residents of Northern France...
October 3, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27929018/greenland-was-nearly-ice-free-for-extended-periods-during-the-pleistocene
#3
Joerg M Schaefer, Robert C Finkel, Greg Balco, Richard B Alley, Marc W Caffee, Jason P Briner, Nicolas E Young, Anthony J Gow, Roseanne Schwartz
The Greenland Ice Sheet (GIS) contains the equivalent of 7.4 metres of global sea-level rise. Its stability in our warming climate is therefore a pressing concern. However, the sparse proxy evidence of the palaeo-stability of the GIS means that its history is controversial (compare refs 2 and 3 to ref. 4). Here we show that Greenland was deglaciated for extended periods during the Pleistocene epoch (from 2.6 million years ago to 11,700 years ago), based on new measurements of cosmic-ray-produced beryllium and aluminium isotopes ((10)Be and (26)Al) in a bedrock core from beneath an ice core near the GIS summit...
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27929005/a-persistent-and-dynamic-east-greenland-ice-sheet-over-the-past-7-5-million-years
#4
Paul R Bierman, Jeremy D Shakun, Lee B Corbett, Susan R Zimmerman, Dylan H Rood
Climate models show that ice-sheet melt will dominate sea-level rise over the coming centuries, but our understanding of ice-sheet variations before the last interglacial 125,000 years ago remains fragmentary. This is because terrestrial deposits of ancient glacial and interglacial periods are overrun and eroded by more recent glacial advances, and are therefore usually rare, isolated and poorly dated. In contrast, material shed almost continuously from continents is preserved as marine sediment that can be analysed to infer the time-varying state of major ice sheets...
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27928195/preparation-and-characterization-of-polycaprolactone-microspheres-by-electrospraying
#5
Feng-Lei Zhou, Penny L Hubbard Cristinacce, Stephen J Eichhorn, Geoff J M Parker
The ability to reproducibly produce and effectively collect electrosprayed polymeric microspheres with controlled morphology and size in bulk form is challenging. In this study, microparticles were produced by electrospraying polycaprolactone (PCL) of various molecular weights and solution concentrations in chloroform, and by collecting materials on different substrates. The resultant PCL microparticles were characterized by optical and electron microscopy to investigate the effect of molecular weight, solution concentration, applied voltage, working distance, and flow rate on their morphology and size...
November 1, 2016: Aerosol Science and Technology: the Journal of the American Association for Aerosol Research
https://www.readbyqxmd.com/read/27919553/the-enhanced-reduction-of-c-and-n-dbp-formation-in-treatment-of-source-water-containing-microcystis-aeruginosa-using-a-novel-ctsac-composite-coagulant
#6
Chunxia Ma, Haiyan Pei, Wenrong Hu, Yuting Wang, Hangzhou Xu, Yan Jin
This study investigated the effect of a chitosan-aluminium chloride (CTSAC) composite coagulation process on reducing the formation of algal organic matters (AOM) related carbonaceous disinfection by-products (C-DBPs) and nitrogenous disinfection by-products (N-DBPs), by removing or adsorbing their precursors. Compared with aluminium chloride (AC) and chitosan (CTS) alone, CTSAC significantly enhanced the removal of dissolved organic matter (DOC), polysaccharide, protein and humic acids, attaining removals of 64...
December 2, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27915190/gunshot-residue-and-brakepads-compositional-and-morphological-considerations-for-forensic-casework
#7
William Tucker, Nick Lucas, Kelsey E Seyfang, K Paul Kirkbride, Rachel S Popelka-Filcoff
Previous research has raised the possibility that automotive brake pads can produce particles that are both compositionally and morphologically similar to gunshot residue (GSR). These studies, published in the early 2000s, coincided with the reduction or removal of unnecessary sources of lead from the automotive industry. The question therefore arises whether modern brake pads might still be a relevant source of 'GSR-like' particles. In the present study, a total of 75 brake pads taken from a range of cars currently on the road in Adelaide, South Australia, were collected from service centres...
November 23, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27913028/active-immunization-with-brucella-abortus-s19-phage-lysate-elicits-serum-igg-that-protects-guinea-pigs-against-virulent-b-%C3%A2-abortus-and-protects-mice-by-passive-immunization
#8
Lata Jain, Mayank Rawat, Saravanan Ramakrishnan, Bablu Kumar
Brucellosis is an economically important zoonosis of worldwide significance. Earlier (Jain et al., 2015) we reported methodology for generation of phage lysate preparations against Brucella abortus S19 using brucellaphage 'ϕLd'. In this study, using a fixed dose (Two mouse PD100) of lysates, the prophylactic efficacies of both plain and alum gel adjuvanted lysates were evaluated in guinea pig by direct virulent challenge and passive mouse protection test (PMPT). Strong humoral and cell mediated immune responses in guinea pigs and protection comparable to S19 vaccine was observed with low dose (1...
November 29, 2016: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/27912988/sequential-electrodialytic-recovery-of-phosphorus-from-low-temperature-gasification-ashes-of-chemically-precipitated-sewage-sludge
#9
Raimon Parés Viader, Pernille Erland Jensen, Lisbeth M Ottosen, Jesper Ahrenfeldt, Henrik Hauggaard-Nielsen
Phosphorus recycling from secondary materials like sewage sludge ashes offers an alternative to mining of phosphates from primary resources and a mean to counteract the current phosphorous rock depletion concern. A separation of P from the bulk ash is normally required, due to its low plant availability and the presence of heavy metals. Previously, more than 80% of P was recovered from incineration sewage sludge ashes using a two-compartment electrodialytic cell. In contrast, the recovery was below 30% for ashes from low-temperature gasification using the same setup...
November 29, 2016: Waste Management
https://www.readbyqxmd.com/read/27909209/reuse-of-bituminous-pavements-a-mini-review-of-research-regulations-and-modelling
#10
REVIEW
Joke Anthonissen, Wim Van den Bergh, Johan Braet
Bituminous pavement can be recycled - even multiple times - by reusing it in new bituminous mixtures. If the mechanical properties of the binder get worse, this reclaimed asphalt is often used in the sub-structure of the road. Apparently, up till now, no end-of-life phase exists for the material. Actually, defining the end-of-life and the end-of-waste stage of a material is important for life cycle assessment modelling. Various standards and scientific studies on modelling life cycle assessment are known, but the crucial stages are not yet defined for reclaimed asphalt pavement...
November 30, 2016: Waste Management & Research
https://www.readbyqxmd.com/read/27908630/non-linear-dose-response-of-aluminium-hydroxide-adjuvant-particles-selective-low-dose-neurotoxicity
#11
Guillemette Crépeaux, Housam Eidi, Marie-Odile David, Yasmine Baba-Amer, Eleni Tzavara, Bruno Giros, François-Jérôme Authier, Christopher Exley, Christopher A Shaw, Josette Cadusseau, Romain K Gherardi
Aluminium (Al) oxyhydroxide (Alhydrogel(®)), the main adjuvant licensed for human and animal vaccines, consists of primary nanoparticles that spontaneously agglomerate. Concerns about its safety emerged following recognition of its unexpectedly long-lasting biopersistence within immune cells in some individuals, and reports of chronic fatigue syndrome, cognitive dysfunction, myalgia, dysautonomia and autoimmune/inflammatory features temporally linked to multiple Al-containing vaccine administrations. Mouse experiments have documented its capture and slow transportation by monocyte-lineage cells from the injected muscle to lymphoid organs and eventually the brain...
November 28, 2016: Toxicology
https://www.readbyqxmd.com/read/27906031/contrasting-biological-potency-of-particulate-matter-collected-at-sites-impacted-by-distinct-industrial-sources
#12
Errol M Thomson, Dalibor Breznan, Subramanian Karthikeyan, Christine MacKinnon-Roy, Ngoc Q Vuong, Ewa Dabek-Zlotorzynska, Valbona Celo, Jean-Pierre Charland, Prem Kumarathasan, Jeffrey R Brook, Renaud Vincent
BACKGROUND: Industrial sources contribute a significant proportion of anthropogenic particulate matter (PM) emissions, producing particles of varying composition that may differentially impact health. This study investigated the in vitro toxicity of ambient PM collected near industrial sites in relation to particle size and composition. METHODS: Size-fractionated particles (ultrafine, PM0.1-2.5, PM2.5-10, PM>10) were collected in the vicinity of steel, copper, aluminium, and petrochemical industrial sites...
December 1, 2016: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/27905608/drop-coating-deposition-of-a-liposome-suspension-on-surfaces-with-different-wettabilities-coffee-ring-formation-and-suspension-preconcentration
#13
Eva Kočišová, Martin Petr, Hana Šípová, Ondřej Kylián, Marek Procházka
Evaporation of a drop of biomolecular solution on a solid surface typically creates a ring-shaped drying pattern, formed by the so-called "coffee ring" effect. The size and shape of the "coffee ring" pattern is strongly dependent on the properties of the surface as well as on the deposited molecular solution or suspension. In this paper, we tested six types of surfaces differing in their physico-chemical surface characteristics (contact angles, wettability and roughness) as well as in the presence or absence of a base metal layer...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27897396/acid-mediated-synthesis-of-ordered-mesoporous-aluminosilicates-the-challenge-and-the-promise
#14
Selvam Parasuraman, Nunna Vamsi Krishna
A novel intrinsic hydrolysis method was employed, for the first-time, to synthesize well-ordered H-AlSBA-15 with trivalent aluminium exclusively in tetrahedral framework structure of SBA-15. Unlike other methods, which involve incorporation of aluminum ions in, both, framework (Brønsted) and non-framework (Lewis) sites of the silicate matrix, the intrinsic hydroly-sis method isomorphously substitutes aluminium ions in the tetrahedral network even at high aluminium content. This unique approach relies mainly on hydrolysis rates of inorganic (silicon and aluminium) precursors used for the preparation in such a way that the condensation occurs simultaneously so as to overcome the usually encountered difficulties in stabilizing aluminium ions in the silicate matrix...
November 29, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27895876/assessment-of-mean-glandular-dose-in-mammography-system-with-different-anode-filter-combinations-using-mcnp-code
#15
Lida Gholamkar, Ali Asghar Mowlavi, Mahdi Sadeghi, Mitra Athari
BACKGROUND: X-ray mammography is one of the general methods for early detection of breast cancer. Since glandular tissue in the breast is sensitive to radiation and it increases the risk of cancer, the given dose to the patient is very important in mammography. OBJECTIVES: The aim of this study was to determine the average absorbed dose of X-ray radiation in the glandular tissue of the breast during mammography examinations as well as investigating factors that influence the mean glandular dose (MGD)...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27895098/brain-aluminium-accumulation-and-oxidative-stress-in-the-presence-of-calcium-silicate-dental-cements
#16
K Demirkaya, B Can Demirdöğen, Z Öncel Torun, O Erdem, E Çırak, Y M Tunca
Mineral trioxide aggregate (MTA) is a calcium silicate dental cement used for various applications in dentistry. This study was undertaken to test whether the presence of three commercial brands of calcium silicate dental cements in the dental extraction socket of rats would affect the brain aluminium (Al) levels and oxidative stress parameters. Right upper incisor was extracted and polyethylene tubes filled with MTA Angelus, MTA Fillapex or Theracal LC, or left empty for the control group, were inserted into the extraction socket...
November 27, 2016: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/27893738/fenugreek-seed-powder-nullified-aluminium-chloride-induced-memory-loss-biochemical-changes-a%C3%AE-burden-and-apoptosis-via-regulating-akt-gsk3%C3%AE-signaling-pathway
#17
Asokan Prema, Arokiasamy Justin Thenmozhi, Thamilarasan Manivasagam, Musthafa Mohamed Essa, Mohammed D Akbar, Mohammed Akbar
Alzheimer's disease (AD) is the most common form of dementia that mainly affects the cognitive functions of the aged populations. Trigonella foenum-graecum (L.) (fenugreek), a traditionally well utilized medicinal plant ubiquitously used as one of the main food additive worldwide, is known to have numerous beneficial health effects. Fenugreek seed extract could be able to inhibit the activity of acetylcholinesterase (AChE), a key enzyme involved in the pathogenesis of AD, and further shown to have anti-parkinsonic effect...
2016: PloS One
https://www.readbyqxmd.com/read/27893732/multiple-nanostructures-based-on-anodized-aluminium-oxide-templates
#18
Liaoyong Wen, Rui Xu, Yan Mi, Yong Lei
Several physico-chemical effects and properties in the solid state involve nanoscale interactions between adjacent materials and morphologies. Arrays of binary nanostructures can generate intimate interactions between different sub-components, but fabricating binary nanostructures is challenging. Here, we propose a concept to achieve diverse binary nanostructure arrays with high degrees of controllability for each of the sub-components, including material, dimension and morphology. This binary nanostructuring concept originates with a distinctive binary-pore anodized aluminium oxide template that includes two dissimilar sets of pores in one matrix, where the openings of the two sets of pores are towards opposite sides of the template...
November 28, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27892598/a-novel-substrate-for-multisensor-hyperspectral-imaging
#19
J Ofner, J Kirschner, E Eitenberger, G Friedbacher, A Kasper-Giebl, H Lohninger, C Eisenmenger-Sittner, B Lendl
The quality of chemical imaging, especially multisensor hyperspectral imaging, strongly depends on sample preparation techniques and instrumental infrastructure but also on the choice of an appropriate imaging substrate. To optimize the combined imaging of Raman microspectroscopy, scanning-electron microscopy and energy-dispersive X-ray spectroscopy, a novel substrate was developed based on sputtering of highly purified aluminium onto classical microscope slides. The novel aluminium substrate overcomes several disadvantages of classical substrates like impurities of the substrate material and contamination of the surface as well as surface roughness and homogeneity...
November 28, 2016: Journal of Microscopy
https://www.readbyqxmd.com/read/27891462/evaluation-of-efficacy-of-three-different-materials-used-in-cheiloscopy-a-comparative-study
#20
Anjaly Dolly, Charlotte Rodrigues, Rashmi Bankur, Pillai Arun Gopinathan, Rakhee Sharma, Annapurna Doddamani
INTRODUCTION: The imprint produced by the lip is termed as 'lip print' and the name given to the examination of lip print is referred to as cheiloscopy. AIM: The present study was done to compare the efficacy of three different materials used in cheiloscopy - Sudan III, Indigo and Aluminium powder. MATERIAL AND METHODS: A total of 60 individuals belonging to the age group of 18-25 years were included in this study. Visible and latent lip prints were reproduced on white cotton fabric, white satin fabric and white clay cup...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
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