Read by QxMD icon Read


Sheng Yan, Yuxing Li, Yuanqing Zhu, Minsu Liu, Qianbin Zhao, Dan Yuan, Guolin Yun, Shiwu Zhang, Weijia Wen, Shi-Yang Tang, Weihua Li
This work presents a simple, low-cost method to fabricate semi-circular channels using solder paste, which can amalgamate the cooper surface to form a half-cylinder mould using the surface tension of Sn-Pd alloy (the main component in solder paste). This technique enables semi-circular channels to be manufactured with different dimensions. These semi-circular channels will then be integrated with a polymethylmethacrylate (PMMA) frame and machine screws to create miniaturised, portable microfluidic valves for sequential liquid delivery and particle synthesis...
March 15, 2018: Electrophoresis
Deepak Jayarajan, Preeti Jacob
Substance use disorders in children and adolescents are a significant cause of concern as they can have long term implications in practically every sphere. The etiological factors that contribute to substance use disorders are complex and the formulation must amalgamate and synthesize all the different factors including the predisposing, perpetuating, precipitating and protective factors in order to plan management. Interventions must stem from this comprehensive formulation and must be child-focused, multidisciplinary, multisystemic, with strong family participation and community involvement...
February 2018: Indian Journal of Psychiatry
Laxman S Walekar, Peidong Hu, Hamed Vafaei Molamahmood, Mingce Long
The integrated system of pyrene and cetyltrimethyl ammonium bromide (CTAB) capped silver nanoparticles (AgNPs) with a distance (r) of 2.78nm has been developed for the detection of Hg (II) and pyrene dimer. The interaction between pyrene and AgNPs results in the fluorescence quenching of pyrene due to the energy transfer, whose mechanism can be attributed to the Forster Resonance Energy Transfer (FRET) supported by experimental observation and theoretical calculations. The developed probe shows a highly selective and sensitive response towards Hg (II) probably due to the amalgam formation, which results in the fluorescence recovery (90%) of pyrene and color change of solution from yellowish brown to colorless...
March 7, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Gabriella Di Lena, Irene Casini, Roberto Caproni, Elena Orban
This study investigated mercury contamination levels in eight commercially valuable Crustacean species caught off the Central Adriatic and Tyrrhenian coasts of Italy. Total mercury levels were measured by Thermal Decomposition-Amalgamation-Atomic Absorption Spectrophotometry. Results showed a high variability among species with values ranging between 0.070 and 1.24 (mg kg-1 wet weight). The lowest mercury levels were detected in caramote prawn (Penaeus kerathurus), warty crab (Eriphia verrucosa) and European spider crab (Maja squinado), decapods living in shallow waters...
March 12, 2018: Food Additives & Contaminants. Part B, Surveillance
Peter Werner Roesky, Christoph Schoo, Sebastian Bestgen, Alexander Egeberg, Svetlana Klementieva, Claus Feldmann, Sergey N Konchenko
Zintl-ions in molecular compounds are of fundamental interest for basic research and application. However, in contrast to the lighter group 15 elements, elemental antimony has never been applied as reagent for the preparation of molecular polystibides. Herein, we report for the first time two reactive antimony sources, which allow the direct access to molecular polystibide compounds. These are Sb amalgam (Sb/Hg) and ultrasmall Sb0 nanoparticles (d = 6.6±0.8 nm), which were used independently as precursors for the synthe-sis of the largest f-element polystibide, [(Cp*2Sm)4Sb8]...
March 12, 2018: Angewandte Chemie
R Tortelli, S Arcuti, M Copetti, R Barone, C Zecca, R Capozzo, M R Barulli, I L Simone, G Logroscino
OBJECTIVE: To evaluate whether the presence of pseudobulbar affect (PBA) in an early stage of the disease influences survival in a population-based incident cohort of amyotrophic lateral sclerosis (ALS). METHODS: Incident ALS cases, diagnosed according to El Escorial criteria, were enrolled from a prospective population-based registry in Puglia, Southern Italy. The Center for Neurologic Study-Lability Scale (CNS-LS), a self-administered questionnaire, was used to evaluate PBA...
March 11, 2018: Acta Neurologica Scandinavica
N Simioni, C Berra, M Boemi, A C Bossi, R Candido, G Di Cianni, S Frontoni, S Genovese, P Ponzani, V Provenzano, G T Russo, L Sciangula, A Lapolla, C Bette, M C Rossi
AIMS: There is an unmet need among healthcare providers to identify subgroups of patients with type 2 diabetes who are most likely to respond to treatment. METHODS: Data were taken from electronic medical records of participants of an observational, retrospective study in Italy. We used logistic regression models to assess the odds of achieving glycated haemoglobin (HbA1c ) reduction ≥ 1.0% point after 12-month treatment with liraglutide (primary endpoint), according to various patient-related factors...
March 12, 2018: Acta Diabetologica
Dena Eltahlah, Christopher D Lynch, Barbara L Chadwick, Igor R Blum, Nairn H F Wilson
AIM: The aim of this study was to review patterns of restoration placement and replacement. A previous study had been carried out in the late 1990s and this study sought to update the literature in this important aspect of dental practice. METHOD: Studies based on the protocol of Mjör (1981) were selected. Such studies involved participating dentists completing a proforma each time a patient presented for a new or replacement restoration. RESULTS: Twenty-five papers were included in this study, of which 12 were included in the original review...
March 6, 2018: Journal of Dentistry
Randall J Nett, Kristin J Cummings, Brenna Cannon, Jean Cox-Ganser, Steven D Nathan
In April 2016, a Virginia dentist who had recently received a diagnosis of idiopathic pulmonary fibrosis (IPF) and was undergoing treatment at a specialty clinic at a Virginia tertiary care center contacted CDC to report concerns that IPF had been diagnosed in multiple Virginia dentists who had sought treatment at the same specialty clinic. IPF is a chronic, progressive lung disease of unknown cause and associated with a poor prognosis (1). Although IPF has been associated with certain occupations (2), no published data exist regarding IPF in dentists...
March 9, 2018: MMWR. Morbidity and Mortality Weekly Report
Jun Hai, Fengjuan Chen, Junxia Su, Fu Xu, Baodui Wang
Wood has attracted increasing scientific interest in the field of green electronics, biological devices, bioenergy and energy storage because of its abundance, low cost, biocompatibility and natural vessel structure. However, its potential application in the important area of environmental monitoring has not yet been effectively explored. In this work, gold nanoparticles (NPs) encapsulated in porous wood (denoted as Au@wood) for high-performance colorimetric detection of Hg2+ in aqueous solution has been constructed...
March 8, 2018: Analytical Chemistry
Pankajkumar R Waghmare, Anuprita D Watharkar, Byong-Hun Jeon, Sanjay P Govindwar
In this study, we have described three steps to produce ethanol from Pogonatherum crinitum , which was derived after the treatment of textile wastewater. (a) Production of biomass: biomass samples collected from a hydroponic P. crinitum phytoreactor treating dye textile effluents and augmented with Ca-alginate immobilized growth-promoting bacterium, Bacillus pumilus strain PgJ (consortium phytoreactor), and waste sorghum husks were collected and dried. Compositional analysis of biomass (consortium phytoreactor) showed that the concentration of cellulose, hemicelluloses and lignin was 42, 30 and 17%, respectively, whereas the biomass samples without the growth-promoting bacterium (normal phytoreactor) was slightly lower, 40, 29 and 16%, respectively...
March 2018: 3 Biotech
Rippin Martin, Lange Sebastian, Sausen Nicole, Becker Burkhard
Biological soil crusts (BSCs) are amalgamations of autotrophic, heterotrophic and saprotrophic organisms. In the Polar Regions, these unique communities occupy essential ecological functions such as primary production, nitrogen fixation and ecosystem engineering. Here we present the first molecular survey of BSCs from the Arctic and Antarctica focused on both eukaryotes and prokaryotes as well as passive and active biodiversity. Considering sequence abundance, Bryophyta is among the most abundant taxa in all analyzed BSCs suggesting that they were in a late successional stage...
March 4, 2018: FEMS Microbiology Ecology
Carine Weber Pires, Djessica Pedrotti, Tathiane Larissa Lenzi, Fabio Zovico Maxnuck Soares, Patricia Klarmann Ziegelmann, Rachel de Oliveira Rocha
This study aimed to compare the longevity of different conventional restorative materials placed in posterior primary teeth. This systematic review was conducted following the PRISMA statement and registered in PROSPERO (CRD42016035775). A comprehensive electronic search without date or language restrictions was performed in PubMed/MEDLINE, Cochrane Central Register of Controlled Trials, Scopus, Turning Research Into Practice (TRIP) and Clinical Trials databases up to January 2017, selecting randomized clinical trials that assessed the longevity of at least two different conventional restorative materials performed in primary molars...
March 1, 2018: Brazilian Oral Research
Maite Cevallos Mijan, Soraya Coelho Leal, Ewald M Bronkhorst, Jo E Frencken
PURPOSE: To determine whether the frequency of microleakage at the margin of the tooth-restoration interface in primary molars restored with high-viscosity glass-ionomer cement (HVGIC) differs from that of primary molars restored with amalgam. MATERIALS AND METHODS: The HVGIC restorations were performed according to the ART method. A total of 19 naturally exfoliated primary molars (10 amalgam and 9 ART/HVGIC) with clinically assessed intact restorations fulfilled the inclusion criteria...
2018: Journal of Adhesive Dentistry
Brice H Curtin, Francesco Manoni, Jiyong Park, Luke J Sisto, Yu-Hong Lam, Michel Gravel, Anne Roulston, Patrick G Harran
We describe the asymmetric synthesis of a highly-substituted ω-octynoic acid derivative and demonstrate its utility for generating complex macrocycles from unprotected peptides. The molecule harbors an isolated quaternary center that displays four uniquely functionalized arms, each of which can be reacted orthogonally in sequence as the molecule is integrated into peptide structure. These processing sequences entail 1) scaffold ligation 2) macrocyclization via internal aromatic alkylations or catalyzed etherifications 3) acyliminium ion mediated embedding of condensed heterocycles and 4) terminal alkyne derivatization or dimeri-zation reactions...
March 1, 2018: Journal of Organic Chemistry
Bruce G Marshall, Marcello M Veiga, Robert J Kaplan, Rebecca Adler Miserendino, Gary Schudel, Bridget A Bergquist, Jean R D Guimarães, Luis G S Sobral, Carolina Gonzalez-Mueller
In Portovelo in southern Ecuador, 87 gold processing centers along the Puyango-Tumbes River produce an estimated 6 tonnes of gold per annum using a combination of mercury amalgamation and/or cyanidation and processing poly-metallic ores. We analysed total Hg, Hg isotopes, total arsenic, cadmium, copper, lead and zinc in water and sediment along the Puyango in 2012-2014. The highest total mercury (THg) concentrations in sediments were found within a 40 km stretch downriver from the processing plants, with levels varying between 0...
March 1, 2018: Environmental Science. Processes & Impacts
K X Xie, Y G Li, P Zhang, X Wang
OBJECTIVE: To evaluate the effect of acid etching of retropreps on seal of different retrofill materials. METHODS: In the study, 80 freshly extracted lower molar teeth were used. They were examined under 3.5× magnifying glass to rull out fractures. They were cleaned and stored in distilled water before use. The distal roots were sectioned off and underwent root canal treatment. Rotary nickel-titanium instruments were used during instrumentation and the roots were obturated using lateral condensation technique...
February 18, 2018: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Jan Aaseth, Bjørn Hilt, Geir Bjørklund
Based on toxicological, clinical, and epidemiological knowledge, the present paper reviews the status regarding possible deleterious health effects from occupational exposure to metallic mercury (Hg) in dental practice. Symptoms from the central nervous system are among the health problems that most often are attributed to Hg exposure in dentists and dental nurses working with amalgam. Uncharacteristic symptoms of chronic low-level Hg vapor exposure including weakness, fatigue, and anorexia have been observed in numerous studies of dental personnel...
February 23, 2018: Environmental Research
Uttam Chakraborty, Julia Leitl, Bernd Mühldorf, Michael Bodensteiner, Stefan Pelties, Robert Wolf
Reduction of [CpAr Fe(μ-Br)]2 (1, CpAr = C5 (C6 H4 -4-Et)5 ) by potassium napthalenide, followed by the addition of white phosphorus, affords [K(18-c-6){CpAr Fe(η4 -P4 )}] (2, 18-c-6 = [18]crown-6), which features a planar cyclo-P4 2- ligand. The related diiron complex [Na2 (THF)5 (CpAr Fe)2 (μ,η4:4 -P4 )] (3) was obtained by reducing 1 with sodium amalgam in the presence of P4 . Protonation of 3 affords [Na(THF)3 ][(CpAr Fe)2 (μ,η4:4 -P4 )(H)] (4), while the reaction of 3 with trimethylchlorosilane gives the nortricyclane compound P7 (SiMe3 )3 as the main product...
February 23, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
R Downie
Successive governments of the UK have strongly supported two policies: an NHS free at the point of delivery, and the encouragement of consumer choice. It was natural for governments to think that amalgamating the policies would increase patient satisfaction, improve efficiency and save money. There are many reasons why this has not been well-received by patients and doctors and has not saved money, but the underlying problem is that there is a conceptual misfit between healthcare as public policy and as individual responsibility...
September 2017: Journal of the Royal College of Physicians of Edinburgh
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"