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https://www.readbyqxmd.com/read/27915376/eco-friendly-approach-for-nanoparticles-synthesis-and-mechanism-behind-antibacterial-activity-of-silver-and-anticancer-activity-of-gold-nanoparticles
#1
REVIEW
Maheshkumar Prakash Patil, Gun-Do Kim
This review covers general information about the eco-friendly process for the synthesis of silver nanoparticles (AgNP) and gold nanoparticles (AuNP) and focuses on mechanism of the antibacterial activity of AgNPs and the anticancer activity of AuNPs. Biomolecules in the plant extract are involved in reduction of metal ions to nanoparticle in a one-step and eco-friendly synthesis process. Natural plant extracts contain wide range of metabolites including carbohydrates, alkaloids, terpenoids, phenolic compounds, and enzymes...
December 3, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27913967/the-texture-of-causal-construals-domain-specific-biases-shape-causal-inferences-from-discourse
#2
Brent Strickland, Ike Silver, Frank C Keil
We conducted five sets of experiments asking whether psychological and physical events are construed in broadly different manners concerning the underlying textures of their causes. In Experiments 1a-1d, we found a robust tendency to estimate fewer causes (but not effects) for psychological than for physical events; Experiment 2 showed a similar pattern of results when participants were asked to generate hypothetical causes and effects; Experiment 3 revealed a greater tendency to ascribe linear chains of causes (but not effects) to physical events; Experiment 4 showed that the expectation of linear chains was related to intuitions about deterministic processes; and Experiment 5 showed that simply framing a given ambiguous event in psychological versus physical terms is sufficient to induce changes in the patterns of causal inferences...
December 2, 2016: Memory & Cognition
https://www.readbyqxmd.com/read/27913831/high-transport-efficiency-of-nanoparticles-through-a-total-consumption-sample-introduction-system-and-its-beneficial-application-for-particle-size-evaluation-in-single-particle-icp-ms
#3
Shin-Ichi Miyashita, Hiroaki Mitsuhashi, Shin-Ichiro Fujii, Akiko Takatsu, Kazumi Inagaki, Toshiyuki Fujimoto
In order to facilitate reliable and efficient determination of both the particle number concentration (PNC) and the size of nanoparticles (NPs) by single-particle ICP-MS (spICP-MS) without the need to correct for the particle transport efficiency (TE, a possible source of bias in the results), a total-consumption sample introduction system consisting of a large-bore, high-performance concentric nebulizer and a small-volume on-axis cylinder chamber was utilized. Such a system potentially permits a particle TE of 100 %, meaning that there is no need to include a particle TE correction when calculating the PNC and the NP size...
December 2, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27913275/dietary-fish-oil-replacement-by-linseed-oil-effect-on-growth-nutrient-utilization-tissue-fatty-acid-composition-and-desaturase-gene-expression-in-silver-barb-puntius-gonionotus-fingerlings
#4
Madhusmita Nayak, Ashis Saha, Avinash Pradhan, Mrinal Samanta, Shiba Shankar Giri
Silver barb (Puntius gonionotus) is considered a promising medium carp species for freshwater aquaculture in Asia. This study in silver barb was carried out to evaluate the effects of total or partial substitution of dietary fish oil (FO) with linseed oil (LO) on growth, nutrient utilization, whole-body composition, muscle and liver fatty acid composition. Fish (12.1±0.4g of initial body weight) were fed for 60days with five experimental iso-proteinous, iso-lipidic and iso-caloric diets in which FO (control diet) was replaced by 33...
November 29, 2016: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/27913000/surgical-prehabilitation-in-patients-with-cancer-state-of-the-science-and-recommendations-for-future-research-from-a-panel-of-subject-matter-experts
#5
REVIEW
Francesco Carli, Julie K Silver, Liane S Feldman, Andrea McKee, Sean Gilman, Chelsia Gillis, Celena Scheede-Bergdahl, Ann Gamsa, Nicole Stout, Bradford Hirsch
This review by a 10-member panel of experts in surgical prehabilitation addresses processes that may improve oncologic care. Surgical prehabilitation is the process on the continuum of care that occurs between the time of cancer diagnosis and the beginning of surgical treatment. The panel focused on the current state-of-the-science and recommended future research that would help to identify the elements that enhance preoperative physical, nutritional, and psychological health in anticipation of surgery, mitigate the burden of disease, facilitate the return of patient health status to baseline values, decrease postoperative morbidity, and reduce health care costs...
February 2017: Physical Medicine and Rehabilitation Clinics of North America
https://www.readbyqxmd.com/read/27912999/palliative-care-and-physiatry-in-the-oncology-care-spectrum-an-opportunity-for-distinct-and-collaborative-approaches
#6
REVIEW
Vishwa S Raj, Julie K Silver, Terrence M Pugh, Jack B Fu
As cancer evolves from a terminal illness to a chronic medical condition, so too does the view of clinical services. Palliative care and physical medicine and rehabilitation (PM&R) will increase in acceptance because they provide a valuable resource. The overarching theme is improving cancer-related symptoms or treatment-related side effects, improving patient health-related quality of life, lessening caregiver burden, and valuing patient-centered care and shared decision making. Managing symptom burden may improve therapy participation/performance...
February 2017: Physical Medicine and Rehabilitation Clinics of North America
https://www.readbyqxmd.com/read/27912842/the-rapid-spread-of-carbapenem-resistant-enterobacteriaceae
#7
REVIEW
Robert F Potter, Alaric W D'Souza, Gautam Dantas
Carbapenems, our one-time silver bullet for multidrug resistant bacterial infections, are now threatened by widespread dissemination of carbapenem-resistant Enterobacteriaceae (CRE). Successful expansion of Enterobacteriaceae clonal groups and frequent horizontal gene transfer of carbapenemase expressing plasmids are causing increasing carbapenem resistance. Recent advances in genetic and phenotypic detection facilitate global surveillance of CRE diversity and prevalence. In particular, whole genome sequencing enabled efficient tracking, annotation, and study of genetic elements colocalized with carbapenemase genes on chromosomes and on plasmids...
November 2016: Drug Resistance Updates: Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy
https://www.readbyqxmd.com/read/27911397/nanostructured-ag-zeolite-composites-as-luminescence-based-humidity-sensors
#8
Eduardo Coutino-Gonzalez, Wouter Baekelant, Bjorn Dieu, Maarten B J Roeffaers, Johan Hofkens
Small silver clusters confined inside zeolite matrices have recently emerged as a novel type of highly luminescent materials. Their emission has high external quantum efficiencies (EQE) and spans the whole visible spectrum. It has been recently reported that the UV excited luminescence of partially Li-exchanged sodium Linde type A zeolites [LTA(Na)] containing luminescent silver clusters can be controlled by adjusting the water content of the zeolite. These samples showed a dynamic change in their emission color from blue to green and yellow upon an increase of the hydration level of the zeolite, showing the great potential that these materials can have as luminescence-based humidity sensors at the macro and micro scale...
November 15, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27909840/variable-toxicity-of-silver-nanoparticles-to-daphnia-magna-effects-of-algal-particles-and-animal-nutrition
#9
Andrea L Conine, Paul C Frost
Aquatic environments vary widely in aspects other than their physicochemical properties that could alter the toxicity of novel contaminants. One factor that could affect chemical toxicity to aquatic consumers is their nutritional environment as it can strongly affect their physiology and life history. Nutrition has the potential to alter an organism's response to the toxin or how the toxin interacts with the consumer through its food. Here we determined how growth and survival responses of Daphnia to an emerging contaminant, silver nanoparticles (AgNPs), are affected by the presence of food and its stoichiometric food quality...
December 1, 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27908301/utility-of-b-type-natriuretic-peptides-in-the-assessment-of-patients-with-systemic-sclerosis-associated-pulmonary-hypertension-in-the-pharos-registry
#10
Lorinda Chung, Robert M Fairchild, Daniel E Furst, Shufeng Li, Firas Alkassab, Marcy B Bolster, Mary Ellen Csuka, Chris T Derk, Robyn T Domsic, Aryeh Fischer, Tracy Frech, Mardi Gomberg-Maitland, Jessica K Gordon, Monique Hinchcliff, Vivien Hsu, Laura K Hummers, Dinesh Khanna, Thomas A Jr Medsger, Jerry A Molitor, Ivana R Preston, Elena Schiopu, Lee Shapiro, Faye Hant, Richard Silver, Robert Simms, John Varga, Virginia D Steen, Roham T Zamanian
OBJECTIVES: To assess the utility of B-type natriuretic peptide (BNP) and N-terminal pro-BNP (NT-proBNP) in detecting and monitoring pulmonary hypertension (PH) in systemic sclerosis (SSc). METHODS: PHAROS is a multicenter prospective cohort of SSc patients at high risk for developing pulmonary arterial hypertension (SSc-AR-PAH) or with a definitive diagnosis of SSc-PH. We evaluated 1) the sensitivity and specificity of BNP≥64 and NT-proBNP≥210 pg/mL for the detection of SSc-PAH and/ or SSc-PH in the SSc-AR-PAH population; 2) baseline and longitudinal BNP and NT-proBNP levels as predictors of progression to SSc-PAH and/or SSc-PH; 3) baseline BNP≥180, NT-proBNP≥553 pg/mL, and longitudinal changes in BNP and NT-proBNP as predictors of mortality in SSc-PH diagnosed patients...
November 10, 2016: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/27907234/shooting-alone-the-pre-attack-experiences-and-behaviors-of-u-s-solo-mass-murderers
#11
Paul Gill, James Silver, John Horgan, Emily Corner
This paper outlines the sociodemographic, developmental, antecedent attack, attack preparation, and commission properties of 115 mass murderers between 1990 and 2014. The results indicate that mass murderer attacks are usually the culmination of a complex mix of personal, political, and social drivers that crystalize at the same time to drive the individual down the path of violent action. We specifically focus upon areas related to prior criminal engagement, leakage, and attack location familiarity. Whether the violence comes to fruition is usually a combination of the availability and vulnerability of suitable targets that suit the heady mix of personal and political grievances and the individual's capability to engage in an attack from both a psychological and technical capability standpoint...
December 1, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27907088/silver-nanoparticle-directed-mast-cell-degranulation-is-mediated-through-calcium-and-pi3k-signaling-independent-of-the-high-affinity-ige-receptor
#12
Nasser B Alsaleh, Indushekhar Persaud, Jared M Brown
Engineered nanomaterial (ENM)-mediated toxicity often involves triggering immune responses. Mast cells can regulate both innate and adaptive immune responses and are key effectors in allergic diseases and inflammation. Silver nanoparticles (AgNPs) are one of the most prevalent nanomaterials used in consumer products due to their antimicrobial properties. We have previously shown that AgNPs induce mast cell degranulation that was dependent on nanoparticle physicochemical properties. Furthermore, we identified a role for scavenger receptor B1 (SR-B1) in AgNP-mediated mast cell degranulation...
2016: PloS One
https://www.readbyqxmd.com/read/27906397/a-room-temperature-environmentally-friendly-solution-process-to-assemble-silver-nanowire-architectures-for-flexible-transparent-electrodes
#13
Ye Yang, Jin-Long Wang, Lei Liu, Zhi-Hua Wang, Jian-Wei Liu, Shu-Hong Yu
In this study, we present a room-temperature environmentally friendly solution process to optimize the performance of the flexible transparent electrodes by co-assembling Ag nanowires and CaCO3 nanowires, and then etching CaCO3 nanowires away, leaving Ag nanowire networks with controllable optical transparency and electrical conductivity. The obtained Ag nanowire flexible transparent electrodes exhibit an averaged transmittance of up to 90% when the sheet resistance is 70 Ω sq(-1) which shows no degradation even after 2000 cycles of fatigue test, indicating their excellent mechanical flexibility and stability...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27906395/regioselective-plasmonic-nano-assemblies-for-bimodal-sub-femtomolar-dopamine-detection
#14
Fengli Gao, Liqiang Liu, Gang Cui, Liguang Xu, Xiaoling Wu, Hua Kuang, Chuanlai Xu
Reliable and ultrasensitive quantification of dopamine (DA) is essential in the precise diagnotherapy of neurological diseases. In this study, dual mode counterpropagating-responsive gold@silver nanoparticle-gold nanorod (Au@AgNP-AuNR) nano-assemblies were fabricated for the precise quantification of DA. The plasmonic Au@AgNP-AuNR assemblies possessed high surface-enhanced Raman scattering (SERS) activity and strong fluorescence quenching, due to the prominent electromagnetic enhancement between the hotspots of the assemblies...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27906376/spin-hall-effect-of-transmitted-light-in-a-three-layer-waveguide-with-lossy-epsilon-near-zero-metamaterial
#15
Tingting Tang, Jie Li, Yanfen Zhang, Chaoyang Li, Li Luo
We study spin Hall effect (SHE) of transmitted light in a three-layer waveguide with epsilon-near-zero (ENZ) metamaterial. As the increased loss of anisotropic ENZ metamaterial brings decreased propagation loss for oblique incidence, the transmission of incident light is enhanced which induces a different distribution of transverse shift peaks. Based on simulation results, the influences of ENZ permittivity components and thickness as well as gold layer thickness on transverse shift of left-circularly polarized light in ENZ/Au/ENZ waveguide are analyzed...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906355/control-of-the-two-photon-fluorescence-of-quantum-dots-coupled-to-silver-nanowires
#16
Weijie Mai, Xiaokang Song, Ping Jiang, Wenzhong Wang, Li Yu, Jiasen Zhang
Plasmon-based fluorescence modulation has led to important advances in various fields and has paved the way toward promising scientific research aimed at enabling new applications. However, the modulation of fluorescence properties based on both localized surface plasmon (LSP) and cavity modes of propagating surface plasmon polaritons (SPPs) are rarely reported. Here, we raster scanned a hybrid nanowire (HNW) with quantum dots (QDs) adsorbed onto a Ag nanowire (NW) and obtained two-photon fluorescence (TPF) maps of the intensity and decay rate...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906354/anticrossing-double-fano-resonances-generated-in-metallic-dielectric-hybrid-nanostructures-using-nonradiative-anapole-modes-for-enhanced-nonlinear-optical-effects
#17
Wu-Chao Zhai, Tie-Zhu Qiao, Dong-Jin Cai, Wen-Jie Wang, Jing-Dong Chen, Zhi-Hui Chen, Shao-Ding Liu
Third-harmonic generation with metallic or dielectric nanoparticles often suffer from, respectively, small modal volumes and weak near-field enhancements. This study propose and demonstrate that a metallic/dielectric hybrid nanostructure composed of a silver double rectangular nanoring and a silicon square nanoplate can be used to overcome these obstacles for enhanced third-harmonic generation. It is shown that the nonradiative anapole mode of the Si plate can be used as a localized source to excite the dark subradiant octupole mode of the Ag ring, and the mode hybridization leads to the formation of an antibonding and a bonding subradiant collective mode, thereby forming anticrossing double Fano resonances...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906303/higher-order-surface-plasmon-contributions-to-passive-and-active-plasmonic-interferometry
#18
Dongfang Li, Jing Feng, Domenico Pacifici
We compare the intensity modulation of passive light transmission and active fluorescence emission in planar plasmonic interferometers consisting of a nano-scale hole flanked by circular grooves etched in a silver film. Discrete fast Fourier transform applied to plasmonic interferograms - i.e., optical interferograms obtained by varying the propagation phase of surface plasmon polaritons (SPPs) - reveals higher-order interference effects that can be enhanced by optimizing in-plane SPP scattering and reflection...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906222/effective-optical-constants-of-anisotropic-silver-nanoparticle-films-with-plasmonic-properties
#19
M N M N Perera, D Schmidt, W E K Gibbs, S Juodkazis, P R Stoddart
Mueller matrix ellipsometry has been used to determine the effective optical constants of island-like Ag films deposited by thermal evaporation. These films depart substantially from bulk silver with a prominent localized surface plasmon resonance. Moreover, despite the isotropic appearance, they exhibit uniaxial optical properties with the optical axis inclined by 83.4° from the substrate normal toward the direction of the incoming vapor flux. The uniaxial model supports the plasmon resonance peaks revealed by in-plane absorbance measurements of the films...
December 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27906147/biogenic-synthesis-of-silver-nanoparticles-from-cassia-fistula-linn-in-vitro-assessment-of-their-antioxidant-antimicrobial-and-cytotoxic-activities
#20
Yugal Kishore Mohanta, Sujogya Kumar Panda, Kunal Biswas, Abiral Tamang, Jaya Bandyopadhyay, Debashis De, Dambarudhar Mohanta, Akshaya Kumar Bastia
The present study reports on biogenic-synthesised silver nanoparticles (AgNPs) derived by treating Ag ions with an extract of Cassia fistula leaf, a popular Indian medicinal plant found in natural habitation. The progress of biogenic synthesis was monitored time to time using a ultraviolet-visible spectroscopy. The effect of phytochemicals present in C. fistula including flavonoids, tannins, phenolic compounds and alkaloids on the homogeneous growth of AgNPs was investigated by Fourier-transform infrared spectroscopy...
December 2016: IET Nanobiotechnology
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