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https://www.readbyqxmd.com/read/28719948/isolation-and-genotyping-of-toxoplasma-gondii-in-brazilian-dogs
#1
Jamille Rodrigues da Silva, Bianca Mendes Maciel, Luana Karla Nogueira de Santana Souza Santos, Fábio Santos Carvalho, Daniele de Santana Rocha, Carlos Wilson Gomes Lopes, George Rêgo Albuquerque
Strains of Toxoplasma gondii in Brazil are highly genetically diverse compared to strains from North America and Europe. Dogs are epidemiologically important because they act as sentinels for T. gondii infections in humans and are good indicators of environmental contamination. The aim of this study was to isolate and genetically characterize T. gondii strains from tissues of naturally infected Brazilian dogs. For this study, 21 blood samples were collected from dogs at the Zoonosis Control Centers of Ilhéus and Itabuna cities, Bahia, Brazil...
June 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28719877/functional-genomic-assessment-of-2-2-bis-bromomethyl-1-3-propanediol-induced-cytotoxicity-in-a-single-gene-knockout-library-of-e-%C3%A2-coli
#2
Miao Guan, Xiaowei Zhang
Functional gene fingerprinting of chemicals could be used to understand the direct gene-chemical interaction in the process of toxification from a genome-wide scale. 2, 2-bis (bromomethyl)-1, 3-propanediol (BMP) is a brominated flame retardant with widespread production but with very limited toxicological data. Here the cytotoxicity of BMP was assessed by Escherichia coli (E. coli) functional genome-wide knockout mutants screening and the underlying molecular mechanism was investigated. The median inhibition concentration (IC50) of BMP was 1...
July 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28719873/characteristics-of-electron-transport-chain-and-affecting-factors-for-thiosulfate-driven-perchlorate-reduction
#3
Chao Zhang, Jianbo Guo, Jing Lian, Caicai Lu, Huu Hao Ngo, Wenshan Guo, Yuanyuan Song, Yankai Guo
The mechanism for perchlorate reduction was investigated using thiosulfate-driven (T-driven) perchlorate reduction bacteria. The influences of various environmental conditions on perchlorate reduction, including pH, temperature and electron acceptors were examined. The maximum perchlorate removal rate was observed at pH 7.5 and 40 °C. Perchlorate reduction was delayed due to the coexistence of perchlorate-chlorate and perchlorate-nitrate. The mechanism of the T-driven perchlorate reduction electron transport chain (ETC) was also investigated by utilizing different inhibitors...
July 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28719870/effects-of-endocrine-disrupting-chemicals-on-estrogen-receptor-alpha-and-heat-shock-protein-60-gene-expression-in-primary-cultures-of-loggerhead-sea-turtle-caretta-caretta-erythrocytes
#4
Paolo Cocci, Martina Capriotti, Gilberto Mosconi, Francesco Alessandro Palermo
The loggerhead turtle (Caretta caretta) can be considered a good indicator species for studying the ecological impact of endocrine disrupting chemicals (EDCs) on wildlife. However, the effect of these environmental pollutants on nuclear steroid hormone signaling has not yet been addressed in sea turtles mainly due to the legal constraints of their endangered status. Here we describe the use of primary erythrocyte cell cultures as in vitro models for evaluating the effects of different EDCs on the expression of estrogen receptor α (ERα)...
July 15, 2017: Environmental Research
https://www.readbyqxmd.com/read/28719869/effectiveness-of-table-top-water-pitcher-filters-to-remove-arsenic-from-drinking-water
#5
Roxanna Barnaby, Amanda Liefeld, Brian P Jackson, Thomas H Hampton, Bruce A Stanton
Arsenic contamination of drinking water is a serious threat to the health of hundreds of millions of people worldwide. In the United States ~3 million individuals drink well water that contains arsenic levels above the Environmental Protection Agency (EPA) maximum contaminant level (MCL) of 10μg/L. Several technologies are available to remove arsenic from well water including anion exchange, adsorptive media and reverse osmosis. In addition, bottled water is an alternative to drinking well water contaminated with arsenic...
July 15, 2017: Environmental Research
https://www.readbyqxmd.com/read/28719847/high-photocatalytic-activity-of-hierarchical-sio2-c-doped-tio2-hollow-spheres-in-uv-and-visible-light-towards-degradation-of-rhodamine-b
#6
Ying Zhang, Juanrong Chen, Li Hua, Songjun Li, Xuanxuan Zhang, Weichen Sheng, Shunsheng Cao
Ongoing research activities are targeted to explore high photocatalytic activity of TiO2-based photocatalysts for the degradation of environmental contaminants under UV and visible light irradiation. In this work, we devise a facile, cost-effective technique to in situ synthesize hierarchical SiO2@C-doped TiO2 (SCT) hollow spheres for the first time. This strategy mainly contains the preparation of monodisperse cationic polystyrene spheres (CPS), sequential deposition of inner SiO2, the preparation of the sandwich-like CPS@SiO2@CPS particles, and formation of outer TiO2...
July 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28719840/environmental-and-human-health-challenges-of-industrial-livestock-and-poultry-farming-in-china-and-their-mitigation
#7
REVIEW
Yuanan Hu, Hefa Cheng, Shu Tao
Driven by the growing demand for food products of animal origin, industrial livestock and poultry production has become increasingly popular and is on the track of becoming an important source of environmental pollution in China. Although concentrated animal feeding operations (CAFOs) have higher production efficiency and profitability with less resource consumption compared to the traditional family-based and "free range" farming, they bring significant environmental pollution concerns and pose public health risks...
July 15, 2017: Environment International
https://www.readbyqxmd.com/read/28719749/transformation-of-unsaturated-fatty-acids-esters-to-corresponding-keto-fatty-acids-esters-by-aerobic-oxidation-with-pd-ii-lewis-acid-la-catalyst
#8
Ahmed M Senan, Sicheng Zhang, Miao Zeng, Zhuqi Chen, Guochuan Yin
Utilization of renewable biomass to partly replace the fossil resources in industrial applications has attracted attention due to the limited fossil feedstock with the increased environmental concerns. This work introduced a modified Wacker-type oxidation for transformation of unsaturated fatty acids/esters to the corresponding keto fatty acids/esters, in which Cu2+ cation was replaced with common non-redox metal ions, that is, a novel Pd(II)/Lewis acid (LA) catalyst. It was found that adding non-redox metal ions can effectively promote Pd(II)-catalyzed oxidation of unsaturated fatty acids/esters to the corresponding keto fatty acids/esters, even much better than Cu2+, and the promotional effect is highly dependent on the Lewis acidity of added non-redox metal ions...
July 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28719737/a-novel-framework-for-analyzing-conservation-impacts-evaluation-theory-and-marine-protected-areas
#9
REVIEW
Michael B Mascia, Helen E Fox, Louise Glew, Gabby N Ahmadia, Arun Agrawal, Megan Barnes, Xavier Basurto, Ian Craigie, Emily Darling, Jonas Geldmann, David Gill, Susie Holst Rice, Olaf P Jensen, Sarah E Lester, Patrick McConney, Peter J Mumby, Mateja Nenadovic, John E Parks, Robert S Pomeroy, Alan T White
Environmental conservation initiatives, including marine protected areas (MPAs), have proliferated in recent decades. Designed to conserve marine biodiversity, many MPAs also seek to foster sustainable development. As is the case for many other environmental policies and programs, the impacts of MPAs are poorly understood. Social-ecological systems, impact evaluation, and common-pool resource governance are three complementary scientific frameworks for documenting and explaining the ecological and social impacts of conservation interventions...
July 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28719697/diagnosis-and-management-of-asthma-in-adults-a-review
#10
Jennifer L McCracken, Sreenivas P Veeranki, Bill T Ameredes, William J Calhoun
Importance: Asthma affects about 7.5% of the adult population. Evidence-based diagnosis, monitoring, and treatment can improve functioning and quality of life in adult patients with asthma. Observations: Asthma is a heterogeneous clinical syndrome primarily affecting the lower respiratory tract, characterized by episodic or persistent symptoms of wheezing, dyspnea, and cough. The diagnosis of asthma requires these symptoms and demonstration of reversible airway obstruction using spirometry...
July 18, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28719671/environmentally-benign-dry-gel-conversions-of-zr-based-uio-metal-organic-frameworks-with-high-yield-and-the-possibility-of-solvent-re-use
#11
Serkan Gökpinar, Tatyana Diment, Christoph Janiak
Herein we report an alternative synthesis method for Zr-based UiO metal-organic frameworks (MOFs), namely dry-gel conversion (DGC). It was possible to synthesize nano- to microsized UiO-66, UiO-66-NH2 and UiO-67 with high crystallinity, high surface area and increased yield using only one-sixth or less of the solvent volume compared to the solution synthesis on the same scale. Additionally, it is shown that solvent re-use is possible over at least five synthesis runs making the DGC method an ecological and extremely solvent-economical route to obtain Zr-based UiO-MOFs with reproducible results...
July 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28719659/dengue-prediction-by-the-web-tweets-are-a-useful-tool-for-estimating-and-forecasting-dengue-at-country-and-city-level
#12
Cecilia de Almeida Marques-Toledo, Carolin Marlen Degener, Livia Vinhal, Giovanini Coelho, Wagner Meira, Claudia Torres Codeço, Mauro Martins Teixeira
BACKGROUND: Infectious diseases are a leading threat to public health. Accurate and timely monitoring of disease risk and progress can reduce their impact. Mentioning a disease in social networks is correlated with physician visits by patients, and can be used to estimate disease activity. Dengue is the fastest growing mosquito-borne viral disease, with an estimated annual incidence of 390 million infections, of which 96 million manifest clinically. Dengue burden is likely to increase in the future owing to trends toward increased urbanization, scarce water supplies and, possibly, environmental change...
July 18, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28719655/protein-analysis-and-gene-expression-indicate-differential-vulnerability-of-iberian-fish-species-under-a-climate-change-scenario
#13
Tiago F Jesus, João M Moreno, Tiago Repolho, Alekos Athanasiadis, Rui Rosa, Vera M F Almeida-Val, Maria M Coelho
Current knowledge on the biological responses of freshwater fish under projected scenarios of climate change remains limited. Here, we examine differences in the protein configuration of two endemic Iberian freshwater fish species, Squalius carolitertii and the critically endangered S. torgalensis that inhabit in the Atlantic-type northern and in the Mediterranean-type southwestern regions, respectively. We performed protein structure modeling of fourteen genes linked to protein folding, energy metabolism, circadian rhythms and immune responses...
2017: PloS One
https://www.readbyqxmd.com/read/28719406/toward-a-biopsychosocial-ecology-of-the-human-microbiome-brain-gut-axis-and-health
#14
Karl J Maier, Mustafa al'Absi
OBJECTIVE: Rapidly expanding insights to the human microbiome and health suggest that Western medicine is poised for significant evolution, or perhaps revolution - this while the field continues on a trajectory from reductionism to a biopsychosocial (BPS) paradigm recognizing biological, psychological, and social influences on health. The apparent sensitivity of the microbiota to perturbations across BPS domains suggests that a broad and inclusive framework is needed to develop applicable knowledge in this area...
July 18, 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28719336/infant-nutritional-status-feeding-practices-enteropathogen-exposure-socioeconomic-status-and-illness-are-associated-with-gut-barrier-function-as-assessed-by-the-lactulose-mannitol-test-in-the-mal-ed-birth-cohort
#15
Gwenyth O Lee, Benjamin J J McCormick, Jessica C Seidman, Margaret N Kosek, Rashidul Haque, Maribel Paredes Olortegui, Aldo A M Lima, Zulfiqar A Bhutta, Gagandeep Kang, Amidou Samie, Caroline Amour, Carl J Mason, Tahmeed Ahmed, Pablo Peñataro Yori, Domingos B Oliveira, Didar Alam, Sudhir Babji, Pascal Bessong, Estomih Mduma, Sanjaya K Shrestha, Ramya Ambikapathi, Dennis R Lang, Michael Gottlieb, Richard L Guerrant, Laura E Caulfield, For The Mal-Ed Network Investigators
The lactulose mannitol (LM) dual sugar permeability test is the most commonly used test of environmental enteropathy in developing countries. However, there is a large but conflicting literature on its association with enteric infection and host nutritional status. We conducted a longitudinal cohort using a single field protocol and comparable laboratory procedures to examine intestinal permeability in multiple, geographically diverse pediatric populations. Using a previously published systematic review to guide the selection of factors potentially associated with LM test results, we examined the relationships between these factors and mucosal breach, represented by percent lactulose excretion; absorptive area, represented by percent mannitol excretion; and gut barrier function, represented by the L/M ratio...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719269/the-influence-of-household-and-community-level-sanitation-and-fecal-sludge-management-on-urban-fecal-contamination-in-households-and-drains-and-enteric-infection-in-children
#16
David Berendes, Amy Kirby, Julie A Clennon, Suraja Raj, Habib Yakubu, Juan Leon, Katharine Robb, Arun Kartikeyan, Priya Hemavathy, Annai Gunasekaran, Ben Ghale, J Senthil Kumar, Venkata Raghava Mohan, Gagandeep Kang, Christine Moe
AbstractUrban sanitation necessitates management of fecal sludge inside and outside the household. This study examined associations between household sanitation, fecal contamination, and enteric infection in two low-income neighborhoods in Vellore, India. Surveys and spatial analysis assessed the presence and clustering of toilets and fecal sludge management (FSM) practices in 200 households. Fecal contamination was measured in environmental samples from 50 households and household drains. Enteric infection was assessed from stool specimens from children under 5 years of age in these households...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719199/giant-pbse-cdse-cdse-quantum-dots-crystal-structure-limited-ultrastable-near-infrared-photoluminescence-from-single-nanocrystals
#17
Christina J Hanson, Nicolai F Hartmann, Ajay Singh, Xuedan Ma, William J I DeBenedetti, Joanna L Casson, John K Grey, Yves J Chabal, Anton V Malko, Milan Sykora, Andrei Piryatinski, Han Htoon, Jennifer A Hollingsworth
Toward a truly photostable PbSe quantum dot (QD) we apply the thick-shell or "giant" QD structural motif to this notoriously environmentally sensitive nanocrystal system. Namely, using a sequential application of two shell-growth techniques-partial-cation exchange and successive ionic layer adsorption and reaction (SILAR)-we are able to overcoat the PbSe QDs with sufficiently thick CdSe shells to impart new single-QD-level photostability as evidenced by suppression of both photobleaching and blinking behavior...
July 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28719193/relationships-between-atmospheric-transport-regimes-and-pcb-concentrations-in-air-at-zeppelin-spitsbergen
#18
Sandy Ubl, Martin Scheringer, Konrad Hungerbühler
Polychlorinated biphenyls (PCBs) are persistent hazardous chemicals that are still detected in the atmosphere and other environmental media although their production has been banned for several decades. At the long-term monitoring site, Zeppelin at Spitsbergen, different PCB congeners have been continuously measured for more than a decade. However, it is not clear what factors determine the seasonal and inter-annual variability of different (lighter vs. heavier) PCB congeners. To investigate the influence of atmospheric transport patterns on PCB-28 and PCB-101 concentrations at Zeppelin, we applied the Lagrangian Particle Dispersion Model FLEXPART and calculated "footprints'' that indicate the potential source regions of air arriving at Zeppelin...
July 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28719191/relationships-between-dissolved-organic-matter-composition-and-photochemistry-in-lakes-of-diverse-trophic-status
#19
Andrew Chapin Maizel, Jing Li, Christina K Remucal
The North Temperate Lakes-Long Term Ecological Research site includes seven lakes in northern Wisconsin that vary in hydrology, trophic status, and landscape position. We examine the molecular composition of dissolved organic matter (DOM) within these lakes using Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) and quantify DOM photochemical activity using probe compounds. Correlations between the relative intensity of individual molecular formulas and reactive species production demonstrate the influence of DOM composition on photochemistry...
July 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28719149/cadmium-induced-toxicity-is-rescued-by-curcumin-a-review
#20
REVIEW
Mohammad Mohajeri, Mehdi Rezaee, Amirhossein Sahebkar
Cadmium (Cd) is one of the most common environmental and occupational heavy metals with extended distribution. Exposure to Cd may be associated with several deleterious consequences on the liver, bones, kidneys, lungs, testes, brain, immunological, and cardiovascular systems. Overproduction of reactive oxygen species (ROS) as the main mechanism behind its toxicity causes oxidative stress and subsequent damages to lipids, proteins, and DNA. Therefore, antioxidants along with chelating agents have shown promising outcomes against Cd-induced toxicity...
July 18, 2017: BioFactors
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