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https://www.readbyqxmd.com/read/29031151/fabrication-of-green-dye-sensitized-solar-cell-based-on-zno-nanoparticles-as-a-photoanode-and-graphene-quantum-dots-as-a-photo-sensitizer
#1
Golnoush Zamiri, Samira Bagheri
Zero-dimensional graphene quantum dots (GQDs) consist of single- or few-layer graphene with a size less than 20 nm and stand for a new type of QDs with unique properties combining the graphene nature and size-resulted quantum effects. GQDs possess unique optical and electronic properties, and in particular possess a band-gap less than 2.0 eV because of quantum confinement and edge effects. In this study, we investigated the performance of DSSCs using different thicknesses of ZnO nanoparticles as a photo-anode and GQDs as a green photosensitizer...
October 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29031050/paraquat-affects-mitochondrial-bioenergetics-dopamine-system-expression-and-locomotor-activity-in-zebrafish-danio-rerio
#2
Xiao H Wang, Christopher L Souders, Yuan H Zhao, Christopher J Martyniuk
The dipyridyl herbicide paraquat induces oxidative stress in cells and is implicated in adult neurodegenerative diseases. However, less is known about paraquat toxicity in early stages of vertebrate development. To address this gap, zebrafish (Danio rerio) embryos were exposed to 1, 10 and 100 μM paraquat for 96 h. Paraquat did not induce significant mortality nor deformity in embryos and larvae, but it did accelerate time to hatch. To evaluate whether mitochondrial respiration was related to earlier hatch times, oxygen consumption rate was measured in whole embryos...
October 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/29029371/structures-of-a-complex-hydrazinium-lead-iodide-n2h5-15pb3i21-possessing-pb2i9-5-pbi6-4-and-i-ions-and-%C3%AE-and-%C3%AE-n2h5-pbi3
#3
Joel S Miller, Eric Campbell, Brandon Dick, Arnold Rheingold, Chuang Zhang, Xiaojie Liu, Zeev Vardeny
Photovoltaic Perovskites, most notably methylammonium lead triiodide, (NH3Me)PbI3, have recently attracted considerable attention, and based upon the 'Goldschmidt Tolerance Factor' hydrazinium should be able to occupy the same cation site as methylammonium. The reaction of N2H5+I- with PbI2 in DMF results in three types of yellow crystals; hexagonal, needle-like, and rod-like, whose structures were determined at 100 K. The hexagonal [P63/m: a = 10.8906(10) Å; b = 37.845(5) Å] crystals possess isolated face sharing octahedral [Pb2I9]5-, [PbI6]4-, and I- ions...
October 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29029239/what-does-the-sleeping-brain-say-syntax-and-semantics-of-sleep-talking-in-healthy-subjects-and-in-parasomnia-patients
#4
Isabelle Arnulf, Ginevra Uguccioni, Frederick Gay, Etienne Baldayrou, Jean-Louis Golmard, Frederique Gayraud, Alain Devevey
Objectives: Speech is a complex function in humans, but the linguistic characteristics of sleep talking are unknown. We analyzed sleep-associated speech in adults, mostly (92%) during parasomnias. Methods: The utterances recorded during night-time video-polysomnography were analyzed for number of words, propositions and speech episodes, frequency, gaps and pauses (denoting turn-taking in the conversation), lemmatization, verbosity, negative/imperative/interrogative tone, first/second person, politeness and abuse...
October 5, 2017: Sleep
https://www.readbyqxmd.com/read/29029228/development-of-a-whole-task-simulator-for-carotid-endarterectomy
#5
Gabrielle Santangelo, Doran Mix, Ahmed Ghazi, Michael Stoner, G Edward Vates, Jonathan J Stone
BACKGROUND: Surgical education relies on operative exposure with live patients. Carotid endarterectomy (CEA) demands an experienced surgeon with a very low complication rate. The high-risk nature of this procedure and the decline in number of CEAs performed annually has created a gap in residency training. OBJECTIVE: To develop a high-fidelity whole-task simulation for CEA that demonstrates content, construct, and face validity. METHODS: Anatomically accurate models of the human neck were created using multilayered poly-vinyl alcohol hydrogels...
September 27, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29029112/diversity-and-regulation-of-intrinsic-%C3%AE-lactamases-from-non-fermenting-and-other-gram-negative-opportunistic-pathogens
#6
Carlos Juan, Gabriel Torrens, Mar González-Nicolau, Antonio Oliver
This review deeply addresses for the first time the diversity, regulation and mechanisms leading to mutational overexpression of intrinsic β-lactamases from non-fermenting and other non-Enterobacteriaceae Gram-negative opportunistic pathogens. After a general overview of the intrinsic β-lactamases described so far in these microorganisms, including circa. 60 species and 100 different enzymes, we review the wide array of regulatory pathways of these β-lactamases. They include diverse LysR-type regulators, which control the expression of β-lactamases from relevant nosocomial pathogens such as Pseudomonas aeruginosa or Stenothrophomonas maltophilia or two-component regulators, with special relevance in Aeromonas spp...
September 22, 2017: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/29029033/trial-evaluating-ambulatory-therapy-of-travelers-diarrhea-treat-td-study-a-randomized-controlled-trial-comparing-3-single-dose-antibiotic-regimens-with-loperamide
#7
Mark S Riddle, Patrick Connor, Jamie Fraser, Chad K Porter, Brett Swierczewski, Emma J Hutley, Brook Danboise, Mark P Simons, Christine Hulseberg, Tahaniyat Lalani, Ramiro L Gutierrez, David R Tribble
Background: Recommended treatment for travelers' diarrhea includes the combination of an antibiotic, usually a fluoroquinolone or azithromycin, and loperamide for rapid resolution of symptoms. However, adverse events, postdose nausea with high-dose azithromycin, effectiveness of single-dose rifaximin, and emerging resistance to front-line agents are evidence gaps underlying current recommendations. Methods: A randomized, double-blind trial was conducted in 4 countries (Afghanistan, Djibouti, Kenya, and Honduras) between September 2012 and July 2015...
September 23, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29028931/deepgo-predicting-protein-functions-from-sequence-and-interactions-using-a-deep-ontology-aware-classifier
#8
Maxat Kulmanov, Mohammed Asif Khan, Robert Hoehndorf
Motivation: A large number of protein sequences are becoming available through the application of novel high-throughput sequencing technologies. Experimental functional characterization of these proteins is time-consuming and expensive, and is often only done rigorously for few selected model organisms. Computational function prediction approaches have been suggested to fill this gap. The functions of proteins are classified using the Gene Ontology (GO), which contains over 40,000 classes...
September 28, 2017: Bioinformatics
https://www.readbyqxmd.com/read/29028895/ccmir-a-computational-approach-for-competitive-and-cooperative-microrna-binding-prediction
#9
Jun Ding, Xiaoman Li, Haiyan Hu
Motivation: The identification of microRNA (miRNA) target sites is important. In the past decade, dozens of computational methods have been developed to predict miRNA target sites. Despite their existence, rarely does a method consider the well-known competition and cooperation among miRNAs when attempts to discover target sites. To fill this gap, we developed a new approach called CCmiR, which takes the cooperation and competition of multiple miRNAs into account in a statistical model to predict their target sites...
September 25, 2017: Bioinformatics
https://www.readbyqxmd.com/read/29028825/specvis-free-and-open-source-software-for-visual-field-examination
#10
Piotr Dzwiniel, Mateusz Gola, Anna Wójcik-Gryciuk, Wioletta J Waleszczyk
Visual field impairment affects more than 100 million people globally. However, due to the lack of the access to appropriate ophthalmic healthcare in undeveloped regions as a result of associated costs and expertise this number may be an underestimate. Improved access to affordable diagnostic software designed for visual field examination could slow the progression of diseases, such as glaucoma, allowing for early diagnosis and intervention. We have developed Specvis, a free and open-source application written in Java programming language that can run on any personal computer to meet this requirement (http://www...
2017: PloS One
https://www.readbyqxmd.com/read/29028756/financial-performance-of-hospitals-in-the-mississippi-delta-region-under-the-hospital-readmissions-reduction-program-and-hospital-value-based-purchasing-program
#11
Hsueh-Fen Chen, Saleema Karim, Fei Wan, Adrienne Nevola, Michael E Morris, T Mac Bird, J Mick Tilford
BACKGROUND: Previous studies showed that the Hospital Readmissions Reduction Program (HRRP) and the Hospital Value-based Purchasing Program (HVBP) disproportionately penalized hospitals caring for the poor. The Mississippi Delta Region (Delta Region) is among the most socioeconomically disadvantaged areas in the United States. The financial performance of hospitals in the Delta Region under both HRRP and HVBP remains unclear. OBJECTIVE: To compare the differences in financial performance under both HRRP and HVBP between hospitals in the Delta Region (Delta hospitals) and others in the nation (non-Delta hospitals)...
November 2017: Medical Care
https://www.readbyqxmd.com/read/29028608/establishment-of-nerve-growth-factor-gradients-on-aligned-chitosan-polylactide-alginate-fibers-for-neural-tissue-engineering-applications
#12
Hua Wu, Jiaoyan Liu, Qing Fang, Bo Xiao, Ying Wan
Nerve conduits containing aligned fibrous fillers with gradiently distributed signal molecules are essential for long-gap nerve repair. This study was to develop an approach for establishing nerve growth factor (NGF) gradients onto the aligned chitosan-polylactide (CH-PLA) fibers. CH-PLA containing 37wt% of PLA was spun into fibers using a wet-spinning technique. CH-PLA fibers showed much higher wet-state tensile strength, enhanced degradation tolerance and significantly lower swelling degree in comparison to chitosan fibers...
October 5, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29028565/human-papillomavirus-vaccine-initiation-in-asian-indians-and-asian-subpopulations-a-case-for-examining-disaggregated-data-in-public-health-research
#13
H Budhwani, P De
OBJECTIVES: Vaccine disparities research often focuses on differences between the five main racial and ethnic classifications, ignoring heterogeneity of subpopulations. Considering this knowledge gap, we examined human papillomavirus (HPV) vaccine initiation in Asian Indians and Asian subpopulations. STUDY DESIGN: National Health Interview Survey data (2008-2013), collected by the National Center for Health Statistics, were analyzed. METHODS: Multiple logistic regression analysis was conducted on adults aged 18-26 years (n = 20,040)...
October 10, 2017: Public Health
https://www.readbyqxmd.com/read/29028525/risk-taking-and-adult-attention-deficit-hyperactivity-disorder-a-gap-between-real-life-behavior-and-experimental-decision-making
#14
Yehuda Pollak, Reut Shalit, Adi Aran
Adults with attention deficit/hyperactivity disorder (ADHD) are prone to suboptimal decision making and risk taking. The aim of this study was to test performance on a theoretically-based probabilistic decision making task in well-characterized adults with and without ADHD, and examine the relation between experimental risk taking and history of real-life risk-taking behavior, defined as cigarette, alcohol, and street drug use. University students with and without ADHD completed a modified version of the Cambridge Gambling Test, in which they had to choose between alternatives varied by level of risk, and reported their history of substance use...
October 3, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29028458/exploring-gender-and-elder-abuse-from-the-perspective-of-professionals
#15
Lori Weeks, Suzanne Dupuis-Blanchard, Rina Arseneault, Colleen MacQuarrie, Danie Gagnon, Ginette Marie LeBlanc
We conducted an online survey of professionals working in two Canadian provinces to learn about their knowledge of elder abuse from a gender-based perspective. A total of 169 professionals (90% women) completed a survey in either French or English. Five topic areas emerged from the analysis: the influence of gender on the risk of abuse; types of abuse detected; knowledge gaps; capacity to respond to gender-based abuse; and awareness of resources. To gain further insight into these results, we conducted 3 focus groups with a total of 24 professionals...
October 13, 2017: Journal of Elder Abuse & Neglect
https://www.readbyqxmd.com/read/29028375/health-disparities-in-patients-with-pulmonary-arterial-hypertension-a-blueprint-for-action-an-official-american-thoracic-society-statement
#16
Arunabh Talwar, Joe G N Garcia, Halley Tsai, Matthew Moreno, Tim Lahm, Roham T Zamanian, Roberto Machado, Steven M Kawut, Mona Selej, Stephen Mathai, Laura Hoyt D'Anna, Sonu Sahni, Erik J Rodriquez, Richard Channick, Karen Fagan, Michael Gray, Jessica Armstrong, Josanna Rodriguez Lopez, Vinicio de Jesus Perez
BACKGROUND: Health disparities have a major impact in the quality of life and clinical care received by minorities in the United States. Pulmonary arterial hypertension (PAH) is a rare cardiopulmonary disorder that affects children and adults and that, if untreated, results in premature death. The impact of health disparities in the diagnosis, treatment, and clinical outcome of patients with PAH has not been systematically investigated. OBJECTIVES: The specific goals of this research statement were to conduct a critical review of the literature concerning health disparities in PAH, identify major research gaps and prioritize direction for future research...
October 15, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29028351/a-hexamer-of-a-peptide-derived-from-a%C3%AE-16-36
#17
Adam G Kreutzer, Ryan K Spencer, Kate J McKnelly, Stan Yoo, Imane L Hamza, Patrick J Salveson, James S Nowick
The absence of high-resolution structures of amyloid oligomers constitutes a major gap in our understanding of amyloid diseases. Increasing evidence indicates that oligomers of the β-amyloid peptide Aβ are especially important in the progression of Alzheimer's disease. In many Aβ oligomers, the Aβ monomer components are thought to adopt a β-hairpin conformation. This paper describes the design and study of a macrocyclic β-hairpin peptide derived from Aβ16-36. SDS-PAGE and size exclusion chromatography studies show that the Aβ16-36 β-hairpin peptide assembles in solution to form hexamers, trimers, and dimers...
October 13, 2017: Biochemistry
https://www.readbyqxmd.com/read/29028286/doppler-guided-goal-directed-fluid-therapy-does-not-affect-intestinal-cell-damage-but-increases-global-gastrointestinal-perfusion-in-colorectal-surgery-a-randomized-controlled-trial
#18
Kostan W Reisinger, Henriette M Willigers, Jochen Jansen, Wim A Buurman, Maarten F Von Meyenfeldt, Geerard L Beets, Martijn Poeze
Individualized, goal-directed fluid therapy (GDFT) based on Doppler measurements of stroke volume has been proposed as a treatment strategy in terms of reducing complications, mortality and length of hospital stay in major bowel surgery. We studied the effect of Doppler guided GDFT on intestinal damage as compared with standard post-operative fluid replacement. STUDY DESIGN: Patients undergoing elective colorectal resection for malignancy were randomized to standard intra- and postoperative fluid therapy or standard fluid therapy with additional Doppler guided GDFT...
October 13, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/29028276/enhancing-antibiotic-stewardship-by-tackling-spurious-penicillin-allergy
#19
Mamidipudi Thirumala Krishna, Aarnoud P Huissoon, Mark Li, Alex Richter, Devadas Ganesh Pillay, Dhinakaran Sambanthan, Sumanth C Raman, Shuaib Nasser, Siraj A Misbah
Approximately 90-99% of patients with a label of penicillin allergy (PenA) are not allergic when comprehensively investigated. An inaccurate label of PenA has major public health implications - longer hospital stay, more frequent hospital admissions, greater use of fluoroquinolones, glycopeptides, cephalosporins and other expensive antibiotics resulting in significantly higher costs to the health service and predisposing to Clostridium difficile, meticillin-resistant Staphylococcus aureus infections and vancomycin resistant enterococcus...
October 13, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29028270/critical-review-of-the-emerging-research-evidence-on-agricultural-biodiversity-diet-diversity-and-nutritional-status-in-low-and-middle-income-countries
#20
Andrew D Jones
The declining diversity of agricultural production and food supplies worldwide may have important implications for global diets. The primary objective of this review is to assess the nature and magnitude of the associations of agricultural biodiversity with diet quality and anthropometric outcomes in low- and middle-income countries. A comprehensive review of 5 databases using a priori exclusion criteria and application of a systematic, qualitative analysis to the findings of identified studies revealed that agricultural biodiversity has a small but consistent association with more diverse household- and individual-level diets, although the magnitude of this association varies with the extent of existing diversification of farms...
October 1, 2017: Nutrition Reviews
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