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https://www.readbyqxmd.com/read/29161803/modeling-the-effects-of-pollutant-emissions-from-large-industrial-complexes-on-benzene-toluene-and-xylene-btx-concentrations-in-urban-areas
#1
Jin-Hee Bang, Inbo Oh, Soontae Kim, Seunghee You, Yangho Kim, Ho-Jang Kwon, Geun-Bae Kim
This study utilized the Community Multi-scale Air Quality (CMAQ) model to simulate the spatial distribution of benzene, toluene, and xylene (BTX) concentrations in Ulsan metropolitan region (UMR), where large national industrial complexes (IC) are located. Through controlling the pollutant emissions in major IC, this study has performed a quantitative analysis on the influence of pollutant emissions from the IC on the BTX concentrations in surrounding urban areas. The seasonal modeling results indicated that the average BTX concentrations were high around the petrochemical complexes, with higher concentrations in the surrounding urban areas during the summer...
November 20, 2017: Environmental Health and Toxicology
https://www.readbyqxmd.com/read/29161710/distribution-of-hepatitis-c-virus-genotypes-and-subtypes-in-the-metropolitan-area-of-naples-italy-in-the-era-of-interferon-free-regimens
#2
Elena Grimaldi, Maria Elena Della Pepa, Francesca Martora, Pasqualino Magliocca, Maria Rosaria Iovene, Nicola Coppola, Giovanna Donnarumma, Massimiliano Galdiero
AIMS: The objective of this work was to study the distribution of hepatitis C virus (HCV) genotypes and subtypes from 2010 to 2015 in 1,221 anti-HCV/HCV-RNA-positive specimens from patients living in the metropolitan area of Naples, since HCV genotypes and subtypes remain cornerstones in the management of chronic HCV infection even in the directly acting antivirals era. METHODS: The study was carried out on 1,221 anti-HCV/HCV-RNA-positive plasma samples collected between April 2010 and December 2015...
November 22, 2017: Intervirology
https://www.readbyqxmd.com/read/29161703/expression-profile-of-notch3-in-mouse-spermatogonia
#3
Ryu Okada, Megumi Fujimagari, Eri Koya, Yoshikazu Hirose, Tomomi Sato, Yukio Nishina
Stable and sustainable spermatogenesis is supported by the strict regulation of self-renewal and differentiation of spermatogonial stem cells (SSC), which are a rare population of undifferentiated spermatogonia. It has been revealed that some signaling factors regulate the self-renewal of SSC; however, the molecular mechanism of SSC maintenance is still not completely understood. Notch signaling is an evolutionarily conserved juxtacrine signaling that plays important roles in the cell fate determination of various tissue stem cells...
January 22, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29161694/immunohistochemical-localization-of-darpp-32-in-the-brain-of-two-lungfishes-further-assessment-of-its-relationship-with-the-dopaminergic-system
#4
Jesús M López, Ruth Morona, Agustín González
The distribution of DARPP-32 (a phosphoprotein related to the dopamine D1 receptor) has been widely used as a means to clarify the brain regions with dopaminoceptive cells, primarily in representative species of tetrapods. The relationship between dopaminergic and dopaminoceptive elements is frequently analyzed using the catecholamine marker tyrosine hydroxylase (TH). In the present study, by means of combined immunohistochemistry, we have analyzed these relationships in lungfishes, the only group of sarcopterygian fishes represented by 6 extant species that are the phylogenetically closest living relatives of tetrapods...
November 22, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/29161669/the-coastal-environment-affects-lead-and-sodium-uptake-by-the-moss-hypnum-cupressiforme-used-as-an-air-pollution-biomonitor
#5
Marie Renaudin, Sébastien Leblond, Caroline Meyer, Christophe Rose, Emeline Lequy
Several studies suggest that potential competition exists between marine cations and heavy metals for binding sites on the cell wall of mosses. This competition would impact the heavy metal concentration measured in mosses by biomonitoring programs, which may underestimate air pollution by heavy metals in a coastal environment. In the present study, we aim to identify possible mechanisms affecting lead uptake by mosses in a coastal environment, specifically, the competition between lead (Pb(2+)) and sodium (Na(+)) for binding sites in Hypnum cupressiforme (Hc)...
November 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29161662/deiodination-of-iopamidol-by-zero-valent-iron-zvi-enhances-formation-of-iodinated-disinfection-by-products-during-chloramination
#6
Huiyu Dong, Zhimin Qiang, Junfeng Lian, Jin Li, Jianwei Yu, Jiuhui Qu
Iodinated X-ray contrast media (ICM) is considered as one of iodine sources for formation of toxic iodinated disinfection byproducts (I-DBPs) during disinfection. This study investigated transformation of a typical ICM, iopamidol (IPM) by zero valent iron (ZVI) and the effect of transformation on the formation of I-DBPs during chloramination. It was found that the presence of ZVI could deiodinate IPM into I(-) and the transformation of IPM exhibited a pseudo-first-order kinetics. Acidic circumstance, SO4(2-), Cl(-) and monochloramine could promote the transformation of IPM by ZVI, while SiO3(2-) inhibited the transformation of IPM...
November 14, 2017: Water Research
https://www.readbyqxmd.com/read/29161655/the-association-between-ambient-temperature-and-mortality-in-south-africa-a-time-series-analysis
#7
Noah Scovronick, Francesco Sera, Fiorella Acquaotta, Diego Garzena, Simona Fratianni, Caradee Y Wright, Antonio Gasparrini
BACKGROUND: There is an extensive literature describing temperature-mortality associations in developed regions, but research from developing countries, and Africa in particular, is limited. METHODS: We conducted a time-series analysis using daily temperature data and a national dataset of all 8.8 million recorded deaths in South Africa between 1997 and 2013. Mortality and temperature data were linked at the district municipality level and relationships were estimated with a distributed lag non-linear model with 21 days of lag, and pooled in a multivariate meta-analysis...
November 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/29161623/functions-of-myosin-motors-tailored-for-parasitism
#8
REVIEW
Christina Mueller, Arnault Graindorge, Dominique Soldati-Favre
Myosin motors are one of the largest protein families in eukaryotes that exhibit divergent cellular functions. Their roles in protozoans, a diverse group of anciently diverged, single celled organisms with many prominent members known to be parasitic and to cause diseases in human and livestock, are largely unknown. In the recent years many different approaches, among them whole genome sequencing, phylogenetic analyses and functional studies have increased our understanding on the distribution, protein architecture and function of unconventional myosin motors in protozoan parasites...
November 18, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29161597/sustainability-of-mega-water-diversion-projects-experience-and-lessons-from-china
#9
Min Yu, Chaoran Wang, Yi Liu, Gustaf Olsson, Chunyan Wang
Water availability and water demand are not evenly distributed in time and space. Many mega water diversion projects have been launched to alleviate water shortages in China. This paper analyzes the temporal and spatial features of 59 mega water diversion projects in China using statistical analysis. The relationship between nine major basins is measured using a network analysis method, and the associated economic, environmental and social impacts are explored using an impact analysis method. The study finds the development of water diversion has experienced four stages in China, from a starting period through to a period of high-speed development...
November 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29161575/sulfadiazine-ciprofloxacin-promote-opportunistic-pathogens-occurrence-in-bulk-water-of-drinking-water-distribution-systems
#10
Haibo Wang, Yi Shen, Chun Hu, Xueci Xing, Dan Zhao
Effects of sulfadiazine and ciprofloxacin on the occurrence of free-living and particle-associated opportunistic pathogens in bulk water of simulated drinking water distribution systems (DWDSs) were investigated. It was found that sulfadiazine and ciprofloxacin greatly promoted the occurrence of opportunistic pathogens including Pseudomonas aeruginosa, Legionella pneumophila, Mycobacterium avium and its broader genus Mycobacterium spp., as well as the amoebae Acanthamoeba spp. and Hartmanella vermiformis, in bulk water of DWDSs...
November 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29161505/characterization-of-the-distribution-of-pyrene-molecules-in-confined-geometries-with-the-model-free-analysis
#11
Xinzhi Cao, Remi Casier, Hunter Little, Jean Duhamel
Evidence is provided showing that global Model Free Analysis (MFA) of monomer and excimer fluorescence decays of pyrene dissolved in aqueous solutions of sodium dodecyl sulfate (SDS) provides the same structural and dynamic information on SDS micelles as the well-established Micelle Model (MM) does. Both MFA and MM were employed to characterize the quenching kinetics between dyes and quenchers located in surfactant micelles and the aggregation number of surfactant micelles. However, contrary to the MM which assumes that dyes and quenchers distribute themselves among SDS micelles according to a Poisson distribution and react with a rate constant that is proportional to the number of reactants in a micelle, the MFA accomplishes this task without making any assumption about the process of pyrene excimer formation in SDS micelles...
November 21, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29161485/aedes-albopictus-skuse-1894-infected-with-the-american-asian-genotype-of-dengue-type-2-virus-in-medell%C3%A3-n-suggests-its-possible-role-as-vector-of-dengue-fever-in-colombia
#12
Andrés Gómez-Palacio, Juan Suaza-Vasco, Sandra Castaño, Omar Triana, Sandra Uribe
INTRODUCTION: Aedes aegypti and Ae. albopictus are recognized vectors of dengue, yellow fever, chikungunya and Zika arboviruses in several countries worldwide. In Colombia, Ae. albopictus geographical distribution has increased to include highly populated cities such as Cali and Medellín. Although this species has been frequently found in urban and semi-urban zones in the country, its role as vector of the dengue fever is poorly known. OBJECTIVE: To identify the presence of Ae...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161484/-anopheles-darlingi-diptera-culicidae-rood-1926-morphometric-variations-in-wings-and-legs-of-populations-from-colombia
#13
Miguel Alfonso Pacheco, Ranulfo González, Helena Luisa Brochero
INTRODUCTION: Natural populations of Anopheles darlingi, the main malaria vector in Colombia, have shown phenotypic variations in some of their diagnostic characters. OBJECTIVE: To characterize morphometric variations in wing spot patterns and diagnostic characters of the hind leg of adult females of An. darlingi collected in areas where malaria is endemic. MATERIALS AND METHODS: Patterns of the costal vein spots of wild females of An. darling populations collected in the departments of Chocó, Guaviare, Meta and Vichada were analyzed using linear and morphometric approaches...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161483/-spatio-temporal-analysis-of-the-biophysical-and-ecological-conditions-of-triatoma-dimidiata-hemiptera-reduviidae-triatominae-in-the-northeast-region-of-colombia
#14
Jaime Badel-Mogollón, Laura Rodríguez-Figueroa, Gabriel Parra-Henao
INTRODUCTION: Due to the lack of information regarding biophysical and spatio-temporal conditions (hydrometheorologic and vegetal coverage density) in areas with Triatoma dimidiata in the Colombian departments of Santander and Boyacá, there is a need to elucidate the association patterns of these variables to determine the distribution and control of this species. OBJECTIVE: To make a spatio-temporal analysis of biophysical variables related to the distribution of T...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161478/-spatial-distribution-of-potential-and-positive-aedes-aegypti-breeding-sites
#15
Daniel Elías Cuartas, Genny Martínez, Diana María Caicedo, Jhonny Garcés, Yoseth Ariza-Araujo, Miguel Peña, Fabián Mendéz
INTRODUCTION: The spatial distribution of Aedes aegypti is heterogeneous, and the interaction between positive and potential breeding sites located both inside and outside homes is one of the most difficult aspects to characterize in vector control programs. OBJECTIVE: To describe the spatial relationship between potential and positive breeding sites of A. aegypti inside and outside homes in Cali, Colombia. MATERIALS AND METHODS: We conducted an entomological survey to collect data from both indoor and outdoor breeding sites...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161476/-spatial-distribution-of-aedes-aegypti-diptera-culicidae-in-the-rural-area-of-two-municipalities-of-cundinamarca-colombia
#16
Laura Cabezas, Wilson Cabanzo, Fernando Santa, Victor Alberto Olano, Diana Sarmiento, Sandra Vargas, Juan Felipe Jaramillo, Thor-Axel Stenstrom, Hans J Overgaard, María Inés Matiz
INTRODUCTION: It is difficult to adapt or create new strategies for dengue control in rural areas due to the dispersion of homes and the lack of knowledge about the presence and behavior of the vector in these areas. Spatial data analysis could help understand time and space dynamics related to the transmission of vector-borne diseases in rural areas and, thus, contribute to the prevention and control of dengue. OBJECTIVE: To determine the probability of the presence of the dengue vector Aedes aegypti in the rural area of the municipalities of Anapoima and La Mesa, in the central area of Colombia...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161442/origin-and-evolution-of-the-bartonella-gene-transfer-agent
#17
Daniel Tamarit, Minna-Maria Neuvonen, Philipp Engel, Lionel Guy, Siv G E Andersson
Gene transfer agents (GTAs) are domesticated bacteriophages that have evolved into molecular machines for the transfer of bacterial DNA. Despite their widespread nature and their biological implications, the mechanisms and selective forces that drive the emergence of GTAs are still poorly understood. Two GTAs have been identified in the Alphaproteobacteria: the RcGTA, which is widely distributed in a broad range of species; and the BaGTA, which has a restricted host range that includes vector-borne intracellular bacteria of the genus Bartonella...
November 17, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29161341/distinct-spatiotemporal-accumulation-of-n-truncated-and-full-length-amyloid-%C3%AE-42-in-alzheimer-s-disease
#18
Mitsuru Shinohara, Shunsuke Koga, Takuya Konno, Jeremy Nix, Motoko Shinohara, Naoya Aoki, Pritam Das, Joseph E Parisi, Ronald C Petersen, Terrone L Rosenberry, Dennis W Dickson, Guojun Bu
Accumulation of amyloid-β peptides is a dominant feature in the pathogenesis of Alzheimer's disease; however, it is not clear how individual amyloid-β species accumulate and affect other neuropathological and clinical features in the disease. Thus, we compared the accumulation of N-terminally truncated amyloid-β and full-length amyloid-β, depending on disease stage as well as brain area, and determined how these amyloid-β species respectively correlate with clinicopathological features of Alzheimer's disease...
November 17, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29161333/precise-mass-determination-of-single-cell-with-cantilever-based-microbiosensor-system
#19
Bogdan Łabędź, Aleksandra Wańczyk, Zenon Rajfur
Having determined the mass of a single cell of brewer yeast Saccharomyces cerevisiae by means of a microcantilever-based biosensor Cantisens CSR-801 (Concentris, Basel, Switzerland), it was found that its dry mass is 47,65 ± 1,05 pg. Found to be crucial in this mass determination was the cell position along the length of the cantilever. Moreover, calculations including cells positions on the cantilever provide a threefold better degree of accuracy than those which assume uniform mass distribution. We have also examined the influence of storage time on the single cell mass...
2017: PloS One
https://www.readbyqxmd.com/read/29161314/conventional-and-technical-diving-surveys-reveal-elevated-biomass-and-differing-fish-community-composition-from-shallow-and-upper-mesophotic-zones-of-a-remote-united-states-coral-reef
#20
Roldan C Muñoz, Christine A Buckel, Paula E Whitfield, Shay Viehman, Randy Clark, J Christopher Taylor, Brian P Degan, Emma L Hickerson
The world's coral reefs appear to be in a global decline, yet most previous research on coral reefs has taken place at depths shallower than 30 m. Mesophotic coral ecosystem (depths deeper than ~30 m) studies have revealed extensive, productive habitats and rich communities. Despite recent advances, mesophotic coral ecosystems remain understudied due to challenges with sampling at deeper depths. The few previous studies of mesophotic coral ecosystems have shown variation across locations in depth-specific species composition and assemblage shifts, potentially a response to differences in habitat or light availability/water clarity...
2017: PloS One
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