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https://www.readbyqxmd.com/read/29149765/sorption-desorption-of-antimony-species-onto-calcined-hydrotalcite-surface-structure-and-control-of-competitive-anions
#1
Leonel Vinicius Constantino, Juliana Nunes Quirino, Taufik Abrão, Paulo Sérgio Parreira, Alexandre Urbano, Maria Josefa Santos
Calcined hydrotalcite can be applied to remove anionic contaminants from aqueous systems such as antimony species due to its great anion exchange capacity and high surface area. Hence, this study evaluated antimonite and antimonate sorption-desorption processes onto calcined hydrotalcite in the presence of nitrate, sulfate and phosphate. Sorption and desorption experiments of antimonite and antimonate were carried out in batch equilibrium and the post-sorption solids were analyzed by X-ray fluorescence (EDXRF)...
November 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29149758/oligotrophy-as-a-major-driver-of-mercury-bioaccumulation-in-medium-to-high-trophic-level-consumers-a-marine-ecosystem-comparative-study
#2
Tiphaine Chouvelon, Pierre Cresson, Marc Bouchoucha, Christophe Brach-Papa, Paco Bustamante, Sylvette Crochet, Françoise Marco-Miralles, Bastien Thomas, Joël Knoery
Mercury (Hg) is a global contaminant of environmental concern. Numerous factors influencing its bioaccumulation in marine organisms have already been described at both individual and species levels (e.g., size or age, habitat, trophic level). However, few studies have compared the trophic characteristics of ecosystems to explain underlying mechanisms of differences in Hg bioaccumulation and biomagnification among food webs and systems. The present study aimed at investigating the potential primary role of the trophic status of systems on Hg bioaccumulation and biomagnification in temperate marine food webs, as shown by their medium-to high-trophic level consumers...
November 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29149579/doing-for-the-greater-good-what-price-in-academe
#3
Suniya S Luthar
In discussing how merit is commonly judged in academia, my focus in this article is not on dimensions that are currently considered but on those that warrant more attention. Grounded in suggestions offered by Sternberg, I argue here for increased recognition of faculty's commitment to intrinsic values-focused on community and relationships-and not just extrinsic ones that connote personal fame or status. I first summarize evidence of disillusionment among today's promising young scholars and then provide exemplars of role models who have, in fact, maintained high standards in both intrinsic and extrinsic domains...
November 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/29149556/evaluating-force-field-london-dispersion-coefficients-using-the-exchange-hole-dipole-moment-model
#4
Mohamad Mohebifar, Erin R Johnson, Christopher N Rowley
London dispersion interactions play an integral role in materials science and biophysics. Force fields for atomistic molecular simulations typically represent dispersion interactions by the 12-6 Lennard-Jones potential, using empirically-determined parameters. These parameters are generally underdetermined and there is no straightforward way to test if they are physically realistic. Alternatively, the exchange-hole dipole moment (XDM) model from density-functional theory predicts atomic and molecular London dispersion coefficients from first principles, providing an innovative strategy to validate the dispersion terms of molecular-mechanical force fields...
November 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29149554/boron-dissolved-and-dust-atmospheric-inputs-to-a-forest-ecosystem-northeastern-france
#5
Philippe Roux, Marie Pierre Turpault, Gil Kirchen, Paul-Olivier Redon, Damien Lemarchand
Boron concentrations and isotopic compositions of atmospheric dust and dissolved depositions were monitored over a two-years period (2012-2013) in the forest ecosystem of Montiers (Northeastern France). This time series allows the determination of the boron atmospheric inputs to this forest ecosystem and contributes to refine our understanding of the sources and processes that control the boron atmospheric cycle. Mean annual dust and dissolved boron atmospheric depositions are comparable in size (13 g.ha-1...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29149547/engineering-escherichia-coli-co-cultures-for-production-of-curcuminoids-from-glucose
#6
Zhen Fang, J Andrew Jones, Jingwen Zhou, Mattheos A G Koffas
Curcuminoids have attracted increasing attention because of the antioxidant, anticancer, and antitumor activities while their production is limited because of its main source, turmeric plant, demonstrates extensive seasonal variation. In this study, we constructed Escherichia coli co-culture system for the rapid production of curcuminoids from glucose. Firstly, the overexpression of curcuminoid synthase and four different strategies related to increasing the intracellular malonyl-CoA pool were conducted in engineered E...
November 17, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/29149514/isolation-and-characterization-of-high-protein-and-phycocyanin-producing-mutants-of-arthrospira-platensis
#7
Geeta G Shirnalli, Manish S Kaushik, Ajay Kumar, Gerard Abraham, Pawan K Singh
Cyanobacteria are known to exhibit their efficiency in producing high concentrations of compounds of commercial value. Arthrospira is one such cyanobacterium which is considered as important source of protein (65%) and other nutrients. In present study, chemical mutagenesis using N-methyl-Ń-Nitro-nitrosoguanidine (NTG), a proven potent mutagen for cyanobacteria was used to bring stable and desirable alteration in Arthrospira platensis ARM 730. Three morphological mutants (G-1, G-2, and SF) were selected and characterized...
November 17, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29149507/registered-nurse-and-midwife-experiences-of-using-videoconferencing-in-practice-a-systematic-review-of-qualitative-studies
#8
REVIEW
Robyn A Penny, Natalie K Bradford, Danette Langbecker
AIM: To synthesise evidence of registered nurses' and midwives' experiences with videoconferencing and identify perceptions of the appropriateness, meaningfulness and feasibility of this technology in professional and clinical practice. BACKGROUND: Videoconferencing is a form of telehealth that can facilitate access to high quality care to improve health outcomes for patients and enable clinicians working in isolation to access education, clinical supervision, peer support and case review...
November 17, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/29149478/hospital-quality-patient-risk-and-medicare-expenditures-for-cancer-surgery
#9
Sarah P Shubeck, Jyothi R Thumma, Justin B Dimick, Hari Nathan
BACKGROUND: Surgical resection is a cornerstone of curative-intent therapy for patients with solid organ malignancies. With increasing attention paid to the costs of surgical care, there is a new focus on variations in the costs of cancer surgery. This study evaluated the potential interactive effect of hospital quality and patient risk on expenditures for cancer resections. METHODS: With 100% Medicare claim data for 2010-2013, patients aged 65 to 99 years who had undergone cancer resection were identified...
November 17, 2017: Cancer
https://www.readbyqxmd.com/read/29149467/geophysical-assessment-of-groundwater-potential-a-case-study-from-mian-channu-area-pakistan
#10
Muhammad Hasan, Yanjun Shang, Gulraiz Akhter, Weijun Jin
An integrated study using geophysical method in combination with pumping tests and geochemical method was carried out to delineate groundwater potential zones in Mian Channu area of Pakistan. Vertical electrical soundings (VES) using Schlumberger configuration with maximum current electrode spacing (AB/2 = 200 m) were conducted at 50 stations and 10 pumping tests at borehole sites were performed in close proximity to 10 of the VES stations. The aim of this study is to establish a correlation between the hydraulic parameters obtained from geophysical method and pumping tests so that the aquifer potential can be estimated from the geoelectrical surface measurements where no pumping tests exist...
November 17, 2017: Ground Water
https://www.readbyqxmd.com/read/29149424/botanical-origin-and-chemical-constituents-of-commercial-saposhnikoviae-radix%C3%A2-and-its-related-crude-drugs-available-in-shaanxi-and-the-surrounding-regions
#11
Takuro Maruyama, Masami Ezaki, Mao Shiba, Hiroki Yamaji, Taichi Yoshitomi, Noriaki Kawano, Shu Zhu, Xiao Cheng, Tsuguo Yokokura, Yutaka Yamamoto, Hiroyuki Fuchino, Hang Sun, Katsuko Komatsu, Nobuo Kawahara
Saposhnikoviae radix (SR) is described in the Japanese Pharmacopoeia as a crude drug derived from the root of Saposhnikovia divaricata Schischkin (Umbelliferae). According to Flora of China, the root of Peucedanum ledebourielloides K. F. Fu is used as a regional substitute for SR. Therefore, we surveyed the botanical origin of the drug used in China, especially Shaanxi and the surrounding regions, through nucleotide sequence analysis of the internal transcribed spacer region of rDNA. As a result, several samples from Shaanxi () and Shanxi () provinces were identified as Peucedanum ledebourielloides...
November 17, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29149345/predictive-indicators-to-identify-high-risk-paediatric-febrile-neutropenia-in-paediatric-oncology-patients-in-a-middle-income-country
#12
Lindy-Lee Green, Pierre Goussard, Anel van Zyl, Martin Kidd, Mariana Kruger
Purpose: To validate a clinical risk prediction score (Ammann score) to predict adverse events (AEs) in paediatric febrile neutropenia (FN). Patients and methods: Patients <16 years of age were enrolled. A risk prediction score (based on haemoglobin ≥ 9 g/dl, white cell count (WCC) < 0.3 G/l, platelet count <50 G/l and chemotherapy more intensive than acute lymphoblastic leukaemia maintenance therapy) was calculated and AEs were documented. Results: In total, 100 FN episodes occurred in 52 patients, male:female ratio was 1...
November 15, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/29149297/dna-knots-occur-in-intracellular-chromatin
#13
Antonio Valdés, Joana Segura, Sílvia Dyson, Belén Martínez-García, Joaquim Roca
In vivo DNA molecules are narrowly folded within chromatin fibers and self-interacting chromatin domains. Therefore, intra-molecular DNA entanglements (knots) might occur via DNA strand passage activity of topoisomerase II. Here, we assessed the presence of such DNA knots in a variety of yeast circular minichromosomes. We found that small steady state fractions of DNA knots are common in intracellular chromatin. These knots occur irrespective of DNA replication and cell proliferation, though their abundance is reduced during DNA transcription...
November 15, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29149296/comparative-transcriptomics-of-five-high-altitude-vertebrates-and-their-low-altitude-relatives
#14
Qianzi Tang, Yiren Gu, Xuming Zhou, Long Jin, Jiuqiang Guan, Rui Liu, Jing Li, Kereng Long, Shilin Tian, Tiandong Che, Silu Hu, Yan Liang, Xuemei Yang, Xuan Tao, Zhijun Zhong, Guosong Wang, Xiaohui Chen, Diyan Li, Jideng Ma, Xun Wang, Miaomiao Mai, An'an Jiang, Xiaolin Luo, Xuebin Lv, Vadim N Gladyshev, Xuewei Li, Mingzhou Li
Background: Species living at high altitude are subject to strong selective pressures due to inhospitable environments (e.g., hypoxia, low temperature, high solar radiation, and lack of biological production), making these species valuable models for comparative analyses of local adaptation. Studies that examined high-altitude adaptation identified a vast array of rapidly evolving genes that characterize the dramatic phenotypic changes in high-altitude animals. However, how high-altitude environment shapes gene expression programs remains largely unknown...
November 15, 2017: GigaScience
https://www.readbyqxmd.com/read/29149281/seroreactivity-to-the-c6-peptide-in-borrelia-miyamotoi-infections-occurring-in-the-northeastern-united-states
#15
Phillip J Molloy, Karen E Weeks, Brittany Todd, Gary P Wormser
Background: There are no Food and Drug Administration (FDA) approved diagnostic tests for Borrelia miyamotoi infection, an emerging tick-borne illness in the United States. The purpose of this study was to evaluate whether the FDA-approved C6 peptide ELISA currently used to diagnose Lyme disease may potentially serve as a diagnostic test for B. miyamotoi infections. Methods: Serum specimens from 30 patients from the Northeastern United States with B. miyamotoi infection established by a polymerase chain reaction assay of a blood specimen were tested using the C6 ELISA...
November 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29149280/whole-genome-re-sequencing-of-two-italian-tomato-landraces-reveals-sequence-variations-in-genes-associated-with-stress-tolerance-fruit-quality-and-long-shelf-life-traits
#16
Valentina Tranchida-Lombardo, Riccardo Aiese Cigliano, Irantzu Anzar, Simone Landi, Samuela Palombieri, Chiara Colantuono, Hamed Bostan, Pasquale Termolino, Riccardo Aversano, Giorgia Batelli, Maria Cammareri, Domenico Carputo, Maria Luisa Chiusano, Clara Conicella, Federica Consiglio, Nunzio D'Agostino, Monica De Palma, Antonio Di Matteo, Silvana Grandillo, Walter Sanseverino, Marina Tucci, Stefania Grillo
Tomato is a high value crop and the primary model for fleshy fruit development and ripening. Breeding priorities include increased fruit quality, shelf life and tolerance to stresses. To contribute towards this goal, we re-sequenced the genomes of Corbarino (COR) and Lucariello (LUC) landraces, which both possess the traits of plant adaptation to water deficit, prolonged fruit shelf-life and good fruit quality. Through the newly developed pipeline Reconstructor, we generated the genome sequences of COR and LUC using datasets of 65...
November 14, 2017: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/29149268/mitral-valve-replacement-with-the-novel-tribio-and-an-established-stented-bioprosthesis-in-a-sheep-model
#17
Sina Stock, Hans-Hinrich Sievers, Doreen Richardt, Michael Scharfschwerdt
OBJECTIVES: Heart valve replacement with a bioprosthesis is one of the most frequently performed procedures in cardiac surgery and represents a highly effective therapy to relieve diseased heart valves. Nevertheless, as postoperatively elevated transvalvular gradients and prosthesis-patient mismatch are reported as shortcomings of the procedure or of the currently used devices, there is a need for novel bioprostheses with improved haemodynamics. This study presents preclinical haemodynamic results after mitral valve replacement with the novel TRIBIO bioprosthesis (TRIBIO) compared with an established bioprosthesis in a sheep model...
November 15, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29149256/structural-and-immunodiagnostic-characterization-of-synthetic-antigen-b-subunits-from-echinococcus-granulosus-and-their-evaluation-as-target-antigens-for-cyst-viability-assessment
#18
Daniela Pagnozzi, Francesca Tamarozzi, Anna Maria Roggio, Vittorio Tedde, Maria Filippa Addis, Salvatore Pisanu, Gabriella Masu, Cinzia Santucciu, Ambra Vola, Adriano Casulli, Giovanna Masala, Enrico Brunetti, Sergio Uzzau
Background: Several tools have been proposed for serodiagnosis of cystic echinococcosis (CE), but none appears promising for cyst viability assessment. Antigens with stage-specific diagnostic value have been described, but few studies with well-characterized antigens and human sera have been performed. Antigen B (AgB) proteoforms hold promise as markers of viability, due to their differential stage-related expression and immunoreactivity. Methods: Four AgB subunits (AgB1, AgB2, AgB3, AgB4) were synthesized and structurally characterized...
November 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29149198/experiences-of-older-people-with-dementia-participating-in-a-high-intensity-functional-exercise-program-in-nursing-homes-while-it-s-tough-it-s-useful
#19
Nina Lindelöf, Lillemor Lundin-Olsson, Dawn A Skelton, Berit Lundman, Erik Rosendahl
The objective of the study was to describe the views and experiences of participation in a high-intensity functional exercise (HIFE) program among older people with dementia in nursing homes. The study design was a qualitative interview study with 21 participants (15 women), aged 74-96, and with a Mini-Mental State Examination score of 10-23 at study start. The HIFE-program comprises exercises performed in functional weight-bearing positions and including movements used in everyday tasks. The exercise was individually designed, supervised in small groups in the nursing homes and performed during four months...
2017: PloS One
https://www.readbyqxmd.com/read/29149176/a-simple-way-for-targeted-delivery-of-an-antibiotic-in-vitro-evaluation-of-a-nanoclay-based-composite
#20
Leslie Valdés, Irela Pérez, Louis Charles de Ménorval, Ernesto Altshuler, Jon Otto Fossum, Aramis Rivera
The sodium-modified form of fluorohectorite nanoclay (NaFh) is introduced as a potential drug carrier, demonstrating its ability for the controlled release of the broad-spectrum antibiotic Ciprofloxacin through in vitro tests. The new clay-drug composite is designed to target the local infections in the large intestine, where it delivers most of the incorporated drug thanks to its pH-sensitive behavior. The composite has been conceived to avoid the use of coating technology and to decrease the side-effects commonly associated to the burst-release of the ciprofloxacin at the stomach level...
2017: PloS One
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