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https://www.readbyqxmd.com/read/28339182/widespread-and-indiscriminate-nanosilver-use-genuine-potential-for-microbial-resistance
#1
Cindy Gunawan, Christopher P Marquis, Rose Amal, Georgios A Sotiriou, Scott A Rice, Elizabeth J Harry
In this era of increasing antibiotic resistance, the use of alternative antimicrobials such as silver has become more widespread. Superior antimicrobial activity has been provided through fabrication of silver nanoparticles or nanosilver (NAg), which imparts cytotoxic actions distinct from those of bulk silver. In the wake of the recent discoveries of bacterial resistance to NAg and its rising incorporation in medical and consumer goods such as wound dressings and dietary supplements, we argue that there is an urgent need to monitor the prevalence and spread of NAg microbial resistance...
March 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28336313/vancomycin-resistant-enterococci-colonisation-risk-factors-and-risk-for-infection-among-hospitalised-paediatric-patients-a-systematic-review-and-meta-analysis
#2
REVIEW
Myrto Eleni Flokas, Spyridon A Karageorgos, Marios Detsis, Michail Alevizakos, Eleftherios Mylonakis
The objective of this study was to estimate the rate and significance of colonisation with vancomycin-resistant enterococci (VRE) among hospitalised children. The PubMed and EMBASE databases were systematically searched (last accessed on 29 May 2016) to identify studies evaluating VRE colonisation of the gastrointestinal tract of hospitalised children in non-outbreak periods. Of 945 non-duplicate citations, 19 studies enrolling 20 234 children were included. The overall and paediatric intensive care unit (PICU) rate of VRE colonisation were both 5% [95% confidence interval (CI) 3-8% overall and 95% CI 2-9% in the PICU] but was 23% in haematology/oncology units (95% CI 18-29%)...
March 20, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28334949/mycoplasma-hominis-ureaplasma-urealyticum-and-chlamydia-trachomatis-respiratory-colonization-in-malaysian-preterm-infants
#3
Khuen Foong Ng, Kah Kee Tan, Mi-Chelle Chok, Nurul Zamil Mohd Muzzamil, Pauline Choo, Umathevi Paramasivam, Marlindawati Mohd Ali, Jun Yan Goh, Wan Ying Gan
This prospective observational study aims to determine the incidence, predictors and clinical features of Mycoplasma hominis (MH), Ureaplasma urealyticum (UU) and Chlamydia trachomatis (CT) respiratory colonization in infants <37 weeks of gestation. A total of 200 preterm newborns admitted to a tertiary center in Malaysia between 2013 and 2015 for increased breathing effort had their respiratory secretions tested for these bacteria by polymerase chain reaction. Fifteen of the 200 (7.5%) infants were detected to have these organisms in their respiratory tracts...
March 2, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28334585/uptake-and-utilization-of-practice-guidelines-in-hospitals-in-the-united-states-the-case-of-routine-episiotomy
#4
Katy B Kozhimannil, Pinar Karaca-Mandic, Cori J Blauer-Peterson, Neel T Shah, Jonathan M Snowden
BACKGROUND: The gap between publishing and implementing guidelines differs based on practice setting, including hospital geography and teaching status. On March 31, 2006, a Practice Bulletin published by the American College of Obstetricians and Gynecologists (ACOG) recommended against the routine use of episiotomy and urged clinicians to make judicious decisions to restrict the use of the procedure. OBJECTIVE: This study investigated changes in trends of episiotomy use before and after the ACOG Practice Guideline was issued in 2006, focusing on differences by hospital geographic location (rural/urban) and teaching status...
January 2017: Joint Commission Journal on Quality and Patient Safety
https://www.readbyqxmd.com/read/28332831/layer-by-layer-assembly-of-amine-reactive-multilayers-using-an-azlactone-functionalized-polymer-and-small-molecule-diamine-linkers
#5
Yashira M Zayas-Gonzalez, Benjamin J Ortiz, David M Lynn
We report the reactive layer-by-layer assembly of amine-reactive polymer multilayers using an azlactone-functionalized polymer and small-molecule diamine linkers. This approach yields crosslinked polymer/linker-type films that can be further functionalized, after fabrication, by treatment with functional primary amines, and provides opportunities to incorporate other useful functionality that can be difficult to introduce using other polyamine building blocks. Films fabricated using poly(2-vinyl-4,4-dimethylazlactone) (PVDMA) and three model non-degradable aliphatic diamine linkers yielded reactive thin films that were stable upon incubation in physiologically relevant media...
March 23, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28330116/novel-pathway-of-cypermethrin-biodegradation-in-a-bacillus-sp-strain-sg2-isolated-from-cypermethrin-contaminated-agriculture-field
#6
Pankaj, Anita Sharma, Saurabh Gangola, Priyanka Khati, Govind Kumar, Anjana Srivastava
Pesticides belonging to pyrethroid group are widely used in agricultural fields to check pest infestation in different crops for enhanced food production. In spite of beneficial effects, non-judicious use of pesticides imposes harmful effect on human health as their residues reach different food materials and ground water via leaching, percolation and bioaccumulation. Looking into the potential of microbial degradation of toxic compounds under natural environment, a cypermethrin-degrading Bacillus sp. was isolated from pesticide-contaminated soil of a rice field of Distt...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28326230/methods-for-preparing-polymer-decorated-single-exchange-biased-magnetic-nanoparticles-for-application-in-flexible-polymer-based-films
#7
Laurence Ourry, Delphine Toulemon, Souad Ammar, Fayna Mammeri
Background: Magnetic nanoparticles (NPs) must not only be well-defined in composition, shape and size to exhibit the desired properties (e.g., exchange-bias for thermal stability of the magnetization) but also judiciously functionalized to ensure their stability in air and their compatibility with a polymer matrix, in order to avoid aggregation which may seriously affect their physical properties. Dipolar interactions between NPs too close to each other favour a collective magnetic glass state with lower magnetization and coercivity because of inhomogeneous and frustrated macrospin cluster freezing...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28321938/construction-of-well-defined-redox-responsive-co2-based-polycarbonates-combination-of-immortal-copolymerization-and-prereaction-approach
#8
Shunjie Liu, Xun Zhao, Hongchen Guo, Yusheng Qin, Xianhong Wang, Fosong Wang
Due to the axial group initiation in traditional (salen)CoX/quaternary ammonium catalyst system, it is difficult to construct single active center propagating polycarbonates for copolymerization of CO2 /epoxides. Here a redox-responsive poly(vinyl cyclohexene carbonate) (PVCHC) with detachable disulfide-bond backbone is synthesized in a controllable manner using (salen)CoTFA/[bis(triphenylphosphine)iminium, [PPN]TFA binary catalyst, where the axial group initiation is depressed by judiciously choosing 3,3'-dithiodipropionic acid as starter...
March 21, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28319829/evaluation-of-the-pharmacokinetics-of-imipenem-following-regional-limb-perfusion-using-the-saphenous-and-the-cephalic-veins-in-standing-horses
#9
G Kelmer, A J Tatz, E Kdoshim, M Britzi, G Segev
This prospective experimental study goal was to determine the pharmacokinetics of imipenem after intravenous regional limb perfusion (IV-RLP) in standing horses. Nine horses participated in the study; that was approved by the University Animal Care and Use Committee. One thoracic limb or one pelvic limb of each horse was randomly selected. After the veins were catheterized, an Esmarch bandage tourniquet was applied and the catheter was injected with a solution containing 500mg of imipenem. Synovial fluid samples were collected from the fetlock joint and blood samples were collected from the jugular vein...
February 24, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28319469/understanding-traditional-research-impact-metrics
#10
Joseph S Butler, Arjun S Sebastian, I David Kaye, Scott C Wagner, Patrick B Morrissey, Gregory D Schroeder, Christopher K Kepler, Alexander R Vaccaro
Traditionally, the success of a researcher has been judged by the number of publications he or she has published in peer-review, indexed, high impact journals. However, to quantify the impact of research in the wider scientific community, a number of traditional metrics have been used, including Impact Factor, SCImago Journal Rank, Eigenfactor Score, and Article Influence Score. This article attempts to provide a broad overview of the main traditional impact metrics that have been used to assess scholarly output and research impact...
March 17, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28316894/maxent-s-parameter-configuration-and-small-samples-are-we-paying-attention-to-recommendations-a-systematic-review
#11
Narkis S Morales, Ignacio C Fernández, Victoria Baca-González
Environmental niche modeling (ENM) is commonly used to develop probabilistic maps of species distribution. Among available ENM techniques, MaxEnt has become one of the most popular tools for modeling species distribution, with hundreds of peer-reviewed articles published each year. MaxEnt's popularity is mainly due to the use of a graphical interface and automatic parameter configuration capabilities. However, recent studies have shown that using the default automatic configuration may not be always appropriate because it can produce non-optimal models; particularly when dealing with a small number of species presence points...
2017: PeerJ
https://www.readbyqxmd.com/read/28314410/enabling-chemistry-technologies-and-parallel-synthesis-accelerators-of-drug-discovery-programmes
#12
A Vasudevan, A R Bogdan, H F Koolman, Y Wang, S W Djuric
There is a pressing need to improve overall productivity in the pharmaceutical industry. Judicious investments in chemistry technologies can have a significant impact on cycle times, cost of goods and probability of technical success. This perspective describes some of these technologies developed and implemented at AbbVie, and their applications to the synthesis of novel scaffolds and to parallel synthesis.
2017: Progress in Medicinal Chemistry
https://www.readbyqxmd.com/read/28314176/metronomic-and-metronomic-like-therapies-in-neuroendocrine-tumors-rationale-and-clinical-perspectives
#13
REVIEW
Ioana Lambrescu, Simona Fica, Diana Martins, Francesca Spada, Chiara Cella, Emilio Bertani, Manila Rubino, Bianca Gibelli, Chiara Grana, Guido Bonomo, Luigi Funicelli, Davide Ravizza, Eleonora Pisa, Dario Zerini, Antonio Ungaro, Nicola Fazio
Metronomic therapy is characterized by the administration of regular low doses of certain drugs with very low toxicity. There have been numerous debates over the empirical approach of this regimen, but fewest side effects are always something to consider in order to improve patients' quality of life. Neuroendocrine tumors (NETs) are rare malignancies relatively slow-growing; therefore their treatment is often chronic, involving several different therapies for tumor growth control. Knowing that these tumors are highly vascularized, the anti-angiogenic aspect is highly regarded as something to be targeted in all patients harboring NETs...
February 24, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28304064/surface-point-defects-on-bulk-oxides-atomically-resolved-scanning-probe-microscopy
#14
Martin Setvín, Margareta Wagner, Michael Schmid, Gareth S Parkinson, Ulrike Diebold
Metal oxides are abundant in nature and they are some of the most versatile materials for applications ranging from catalysis to novel electronics. The physical and chemical properties of metal oxides are dramatically influenced, and can be judiciously tailored, by defects. Small changes in stoichiometry introduce so-called intrinsic defects, e.g., atomic vacancies and/or interstitials. This review gives an overview of using Scanning Probe Microscopy (SPM), in particular Scanning Tunneling Microscopy (STM), to study the changes in the local geometric and electronic structure related to these intrinsic point defects at the surfaces of metal oxides...
March 17, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28302022/glial-cell-a-potential-target-for-cellular-and-drug-based-therapy-in-various-cns-diseases
#15
Shakeeb Ahmed, Yasmin Sultana, Azka Gull, Tahir Khuroo, Mohd Aqil
Glial cells are integrated part of neurovascular unit of blood brain barrier (BBB). They undergo mitosis and mainly classified as astrocytes, oligodendrocytes, microglia, ependymal cells and nerve glial antigen 2 cells. Being a most versatile glial cell, astrocytes provide structural support to neurons, maintain brain homeostasis, take part in neuronal communication, and perform some housekeeping functions. Oligodendrocytes myelinate the neuronal axons for proper transmission of nerve impulse and microglia are brain immune cells...
March 16, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28300643/draft-genome-sequence-of-multidrug-resistant-salmonella-enterica-serovar-brancaster-strain-ps01-isolated-from-chicken-meat-malaysia
#16
Pui San Chin, Choo Yee Yu, Geik Yong Ang, Wai-Fong Yin, Kok-Gan Chan
OBJECTIVES: Salmonella spp. represent one of the main diarrhoeal pathogens that are transmitted via the food supply chain. Here we report the draft genome sequence of a multidrug-resistant Salmonella enterica serovar Brancaster (PS01) that was isolated from poultry meat in Malaysia. METHODS: Genomic DNA was extracted from Salmonella strain PS01 and was sequenced using an Illumina HiSeq 2000 platform. The generated reads were de novo assembled using CLC Genomics Workbench...
March 11, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28299267/postsurgical-consequences-in-lower-third-molar-surgical-extraction-using-micromotor-and-piezosurgery
#17
Freddy Kersi Mistry, Nidarsh Diwakar Hegde, Mithra Nidarsh Hegde
BACKGROUND: One of the most critical and crucial steps in surgical extraction is cutting the bone or osteotomy, for which many techniques are used, e.g., chisels and mallet, rotary instruments, and ultrasound bone-cutting instruments. If they are not used judiciously, they can be hazardous. OBJECTIVES: To assess the efficiency of piezosurgery unit over micromotor while performing surgical extraction of lower third molars by assessing the time taken for the surgery and measuring postoperative parameters such as pain, trismus, and swelling...
July 2016: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28298171/extended-release-of-flurbiprofen-from-tromethamine-buffered-hpmc-hydrophilic-matrix-tablets
#18
Samuel Pygall, Sarah Kujawinski, Peter Timmins, Colin Melia
The pH-dependent solubility of a drug can lead to pH-dependent drug release from hydrophilic matrix tablets. Adding buffer salts to the formulation to attempt to mitigate this can impair matrix hydration and negatively impact drug release. An evaluation of the buffering of hydrophilic matrix tablets containing a pH-dependent solubility weak acid drug (flurbiprofen), identified as possessing a deleterious effect on hydroxypropyl methylcellulose (HPMC) solubility, swelling and gelation, with respect to drug dissolution and the characteristics of the hydrophilic matrix gel layer in the presence of tromethamine as a buffer was undertaken...
March 16, 2017: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/28298094/fcs-experiments-to-quantify-ca-2-diffusion-and-its-interaction-with-buffers
#19
Lorena Sigaut, Cecilia Villarruel, Silvina Ponce Dawson
Ca(2+) signals are ubiquitous. One of the key factors for their versatility is the variety of spatio-temporal distributions that the cytosolic Ca(2+) can display. In most cell types Ca(2+) signals not only depend on Ca(2+) entry from the extracellular medium but also on Ca(2+) release from internal stores, a process which is in turn regulated by cytosolic Ca(2+) itself. The rate at which Ca(2+) is transported, the fraction that is trapped by intracellular buffers, and with what kinetics are thus key features that affect the time and spatial range of action of Ca(2+) signals...
March 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28295712/modulation-doped-in2-o3-zno-heterojunction-transistors-processed-from-solution
#20
Dongyoon Khim, Yen-Hung Lin, Sungho Nam, Hendrik Faber, Kornelius Tetzner, Ruipeng Li, Qiang Zhang, Jun Li, Xixiang Zhang, Thomas D Anthopoulos
This paper reports the controlled growth of atomically sharp In2 O3 /ZnO and In2 O3 /Li-doped ZnO (In2 O3 /Li-ZnO) heterojunctions via spin-coating at 200 °C and assesses their application in n-channel thin-film transistors (TFTs). It is shown that addition of Li in ZnO leads to n-type doping and allows for the accurate tuning of its Fermi energy. In the case of In2 O3 /ZnO heterojunctions, presence of the n-doped ZnO layer results in an increased amount of electrons being transferred from its conduction band minimum to that of In2 O3 over the interface, in a process similar to modulation doping...
March 15, 2017: Advanced Materials
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