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https://www.readbyqxmd.com/read/28199121/smart-contact-lenses-with-graphene-coating-for-electromagnetic-interference-shielding-and-dehydration-protection
#1
Sangkyu Lee, Insu Jo, Sangmin Kang, Bongchul Jang, Joonhee Moon, Jong Bo Park, Soochang Lee, Sichul Rho, Youngsoo Kim, Byung Hee Hong
Recently, smart contact lenses with electronic circuits have been proposed for various sensor and display applications where the use of flexible and biologically stable electrode materials is essential. Graphene is an atomically thin carbon material with a two-dimensional hexagonal lattice that shows outstanding electrical and mechanical properties as well as excellent biocompatibility. In addition, graphene is capable of protecting eyes from electromagnectic (EM) waves that may cause eye diseases such as cataracts...
February 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28185453/modification-of-the-highly-conductive-pedot-pss-layer-for-use-in-silver-nanogrid-electrodes-for-flexible-inverted-polymer-solar-cells
#2
Jie Wang, Fei Fei, Qun Luo, Shuhong Nie, Na Wu, Xiaolian Chen, Wenming Su, Yuanjie Li, Chang-Qi Ma
Silver nanogrid based flexible transparent electrode is recognized as the most promising alternative to ITO electrode for organic electronics, owing to its low production cost and excellent flexibility. Typically, a highly conductive thin film coating layer, such as highly conductive PEDOT:PSS (HC-PEDOT:PSS) is usually deposited onto the Ag-grid electrode to smooth the surface and to minimize the sheet resistance. In this paper, we found that inverted flexible polymer solar cells with structure of Ag-grid/HC-PEDOT:PSS/ZnO/photoactive layer/MoO3/Al generally exhibits strong S-shaped J-V curves, which could be eliminated by light-soaking treatment...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28181549/rare-earth-free-self-luminescent-ca2kzn2-vo4-3-phosphors-for-intense-white-light-emitting-diodes
#3
L Krishna Bharat, Soo-Kun Jeon, Kurugundla Gopi Krishna, Jae Su Yu
The commercially available white-light-emitting diodes (WLEDs) are made with a combination of blue LEDs and yellow phosphors. These types of WLEDs lack certain properties which make them meagerly applicable for general illumination and flat panel displays. The solution for such problem is to use near-ultraviolet (NUV) chips as an excitation source because of their high excitation efficiency and good spectral distribution. Therefore, there is an active search for new phosphor materials which can be effectively excited within the NUV wavelength range (350-420 nm)...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28159431/cost-effectiveness-of-ambulatory-blood-pressure-monitoring-in-the-management-of-hypertension
#4
Diogo Costa, Ricardo Peixoto Lima
INTRODUCTION AND OBJECTIVES: The prevalence of hypertension in Portugal is between 29.1% and 42.2%. International studies show that 13% of individuals have masked hypertension and 13% of diagnoses based on office blood pressure measurements are in fact white coat hypertension. More sensitive and specific blood pressure measuring methods could avoid costs associated with misdiagnosis. The aim of this study was to review the cost-effectiveness of ambulatory blood pressure monitoring (ABPM) compared to other methods in the management of hypertension...
February 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28156196/the-potential-for-political-leadership-in-hiv-aids-communication-campaigns-in-sub-saharan-africa
#5
Abraar Karan, Emily Hartford, Thomas J Coates
BACKGROUND: The HIV/AIDS epidemic has become a point of important political concern for governments especially in Sub-Saharan Africa. Clinical and public health interventions to curb the epidemic can be greatly enhanced with the strategic support of political leaders. OBJECTIVE: We analyzed the role of national political leadership in large-scale HIV/AIDS communications campaigns in 14 countries in Sub-Saharan Africa. METHODS: We primarily reviewed grey and white literature published from 2005-2014...
2017: Global Health Action
https://www.readbyqxmd.com/read/28145683/evidence-for-the-phospholipid-sponge-effect-as-the-biocidal-mechanism-in-surface-bound-polyquaternary-ammonium-coatings-with-variable-cross-linking-density
#6
Jing Gao, Evan M White, Qiaohong Liu, Jason Locklin
Poly quaternary "-oniums" derived from polyethylenimine (PEI), poly(vinyl-N-alkylpyridinium), or chitosan belong to a class of cationic polymers that are efficient antimicrobial agents. When dissolved in solution, the positively charged polycations are able to displace the divalent cations of the cellular phospholipid bilayer and disrupt the ionic cross-links and structural integrity of the membrane. However, when immobilized to a surface where confinement limits diffusion, poly -oniums still show excellent antimicrobial activity, which implies a different biocidal mode of action...
February 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28139193/effects-of-nsaids-and-hydroxyapatite-coating-on-osseointegration
#7
Ahmet Salduz, Fatih Dikici, Önder Ismet Kılıçoğlu, Halil Ibrahim Balcı, Turgut Akgul, Mehmet Kürkçü, Cem Kurtoğlu, Remzi Tözün
PURPOSE: The aim of our study is to investigate the bone ongrowth of two different alternative surfaces and the effect of nonsteroidal anti-inflammatory drugs (NSAIDs) on osseointegration. METHODS: Hips of 40 New Zealand white rabbits were operated bilaterally. Hydroxyapatite (HA)-coated titanium rods were implanted into the right femur, and grit-blasted titanium rods were implanted into the left femur. They were divided into three groups. At the end of 8 weeks, both femora of the rabbits were removed and investigated biomechanically and histologically...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28098753/reagent-less-and-robust-biosensor-for-direct-determination-of-lactate-in-food-samples
#8
Iria Bravo, Mónica Revenga-Parra, Félix Pariente, Encarnación Lorenzo
Lactic acid is a relevant analyte in the food industry, since it affects the flavor, freshness, and storage quality of several products, such as milk and dairy products, juices, or wines. It is the product of lactose or malo-lactic fermentation. In this work, we developed a lactate biosensor based on the immobilization of lactate oxidase (LOx) onto N,N'-Bis(3,4-dihydroxybenzylidene) -1,2-diaminobenzene Schiff base tetradentate ligand-modified gold nanoparticles (3,4DHS-AuNPs) deposited onto screen-printed carbon electrodes, which exhibit a potent electrocatalytic effect towards hydrogen peroxide oxidation/reduction...
January 13, 2017: Sensors
https://www.readbyqxmd.com/read/28094922/nano-photoelectrochemical-cell-arrays-with-spatially-isolated-oxidation-and-reduction-channels
#9
Hang-Ah Park, Siyuan Liu, Youngseok Oh, Paul A Salvador, Gregory S Rohrer, Mohammad F Islam
Photoelectrochemical conversion of solar energy is explored for many diverse applications but suffers from poor efficiencies due to limited solar absorption, inadequate charge carrier separation, redox half-reactions occurring in close proximity, and/or long ion diffusion lengths. We have taken a drastically different approach to the design of photoelectrochemical cells (PECs) to spatially isolate reaction sites at the nanoscale to different materials and flow channels, suppressing carrier recombination and back-reaction of intermediates while shortening ion diffusion paths and, importantly, avoiding mixed product generation...
January 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28035582/endothelial-dysfunction-and-hypertension
#10
Dildar Konukoglu, Hafize Uzun
In the past, endothelium was thought to be only a mechanical barrier. Today, endothelium is known to be a tissue regulating vascular tone, cell growth and the interaction between the leukocytes, thrombocytes and the vessel wall. It also synthesizes growth factors and thrombo-regulatory molecules and responds to physical and chemical signals. Even though the term "endothelial dysfunction" is generally used for deterioration of endothelium-dependent vasodilatation; the term also includes the abnormalities between endothelium and leukocytes, thrombocytes and regulatory molecules and conditions resulting in aberrant endothelium activation...
December 30, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27992657/protection-of-penaeus-monodon-against-white-spot-syndrome-by-continuous-oral-administration-of-a-low-concentration-of-bacillus-subtilis-spores-expressing-the-vp28-antigen
#11
K-C Pham, H T T Tran, C Van Doan, P H Le, A T Van Nguyen, H A Nguyen, H A Hong, S M Cutting, T-N Phan
: In this study, Bacillus subtilis spores expressing a chimeric protein, CotB-VP28, were used as a probiotic vaccine to protect black tiger shrimps (Penaeus monodon) against white spot syndrome virus (WSSV) infection. Oral administration of pellets coated with CotB-VP28 spores (at ≥1 × 10(9 ) CFU per g pellet) to shrimps induced immune-relating phenoloxydase activity (PO) in shrimps after 14 days of feeding (prior challenge) and at day 3 post challenge (1·26 and 1·70 fold increase respectively)...
December 19, 2016: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/27987907/the-release-kinetics-of-%C3%AE-carotene-nanocapsules-xanthan-gum-coating-and-quality-changes-in-fresh-cut-melon-cantaloupe
#12
María L Zambrano-Zaragoza, David Quintanar-Guerrero, Alicia Del Real, Elizabeth Piñon-Segundo, José F Zambrano-Zaragoza
The main aim of this work was to evaluate the effect of the β-carotene release rate from nanocapsules incorporated into a xanthan gumcoating on the physical and physicochemical properties of fresh-cut melon (var. cantaloupe). Several coatings were studied: xanthan gum alone (XG), xanthan gum combined with nanocapsules (Ncs/XG), xanthan gum combined with nanospheres (Nsp/XG), nanocapsules (Ncs), and nanospheres (Nsp), all of which were compared to untreated fresh-cut melon in order to determine their preservation efficiency...
February 10, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27982574/an-environmentally-benign-antimicrobial-coating-based-on-a-protein-supramolecular-assembly
#13
Jin Gu, Yajuan Su, Peng Liu, Peng Li, Peng Yang
The use of antimicrobial materials, for example, silver nanoparticles, has been a cause for concern because they often exert an adverse effect on environmental and safety during their preparation and use. In this study, we report a class of green antimicrobial coating based on a supramolecular assembly of a protein extracted from daily food, without the addition of any other hazardous agents. It is found that a self-assembled nanofilm by mere hen egg white lysozyme has durable in vitro and in vivo broad-spectrum antimicrobial efficacy against Gram-positive/negative and fungi...
December 23, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27982269/blood-pressure-treatment-adherence-and-control-after-participation-in-the-rehot
#14
Nathália Silva de Jesus, Armando da Rocha Nogueira, Cacilda Oliveira Pachu, Ronir Raggio Luiz, Glaucia Maria Moraes de Oliveira
Background: Lack of adherence to pharmacological treatment is one of the main causes of low control rates in hypertension. Objective: To verify treatment adherence and associated factors, as well as blood pressure (BP) control in participants of the Resistant Hypertension Optimal Treatment (ReHOT) clinical trial. Method: Cross-sectional study including all 109 patients who had completed the ReHOT for at least 6 months. We excluded those participants who failed to respond to the new recruitment after three phone contact attempts...
November 2016: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/27982122/thiol-capped-gold-nanoparticles-swell-encapsulated-into-polyurethane-as-powerful-antibacterial-surfaces-under-dark-and-light-conditions
#15
Thomas J Macdonald, Ke Wu, Sandeep K Sehmi, Sacha Noimark, William J Peveler, Hendrik du Toit, Nicolas H Voelcker, Elaine Allan, Alexander J MacRobert, Asterios Gavriilidis, Ivan P Parkin
A simple procedure to develop antibacterial surfaces using thiol-capped gold nanoparticles (AuNPs) is shown, which effectively kill bacteria under dark and light conditions. The effect of AuNP size and concentration on photo-activated antibacterial surfaces is reported and we show significant size effects, as well as bactericidal activity with crystal violet (CV) coated polyurethane. These materials have been proven to be powerful antibacterial surfaces against both Gram-positive and Gram-negative bacteria...
December 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27926690/changes-of-blood-pressure-patterns-and-target-organ-damage-in-patients-with-chronic-kidney-disease-results-of-the-aprodite-2-study
#16
Ran-Hui Cha, Hajeong Lee, Jung Pyo Lee, Eunjeong Kang, Young Rim Song, Yon Su Kim, Sung Gyun Kim
OBJECTIVE: Blood pressure (BP) control is the most established practice for preventing the progression of chronic kidney disease (CKD). We examined the BP control and nocturnal dipping pattern changes in hypertensive patients with CKD and their effects on target organ damages. METHODS: We recruited 378 hypertensive CKD patients from four centers in Korea. The patients underwent clinic and ambulatory BP monitoring at the time of enrollment and 1 year later. RESULTS: The BP control states at the two time points were as follows: true controlled (16...
March 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/27925275/nanoparticle-ag-co-exposure-reduces-the-accumulation-of-weathered-persistent-pesticides-by-earthworms
#17
Arnab Mukherjee, Joseph Hawthorne, Jason C White, Jason W Kelsey
Although the use of engineered nanomaterials continues to increase, an understanding of how these materials interact with co-existing contaminants in the environment is largely unknown. Here, the effect of Ag in bulk, ionic, and nanoparticle (NP; bare and polyvinyl pyrrolidone coated) form at 3 concentrations (0, 500, 1000, 2000 mg/kg; ion at 69, 138, 276 mg/kg) on the accumulation of field weathered chlordane and dichlorodiphenyldichloroethylene + metabolites (DDX) by Eisenia fetida (earthworm) was investigated...
December 7, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27918999/effect-of-silver-nanoparticles-on-the-metabolic-rate-hematological-response-and-survival-of-juvenile-white-shrimp-litopenaeus-vannamei
#18
Karla Juarez-Moreno, Claudio Humberto Mejía-Ruiz, Fernando Díaz, Horacio Reyna-Verdugo, Ana Denisse Re, Edgar F Vazquez-Felix, Edna Sánchez-Castrejón, Josué D Mota-Morales, Alexey Pestryakov, Nina Bogdanchikova
White spot syndrome virus (WSSV) is highly lethal and contagious in shrimps; its outbreaks causes an economic crisis for aquaculture. Several attempts have been made to treat this disease; however, to date, there is no effective cure. Because of their antimicrobial activities, silver nanoparticles (AgNPs) are the most studied nanomaterial. Although the antiviral properties of AgNPs have been studied, their antiviral effect against viral infection in aquaculture has not been reported. The AgNPs tested herein are coated with polyvinylpyrrolidone (PVP) and possess multiple international certifications for their use in veterinary and human applications...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27907131/itraq-based-quantitative-proteomic-comparison-of-early-and-late-passage-human-dermal-papilla-cell-secretome-in-relation-to-inducing-hair-follicle-regeneration
#19
Huan Zhang, Ning-Xia Zhu, Keng Huang, Bo-Zhi Cai, Yang Zeng, Yan-Ming Xu, Yang Liu, Yan-Ping Yuan, Chang-Min Lin
Alopecia is an exceedingly prevalent problem that lacks effective therapy. Recently, research has focused on early-passage dermal papilla cells (DPCs), which have hair inducing activity both in vivo and in vitro. Our previous study indicated that factors secreted from early-passage DPCs contribute to hair follicle (HF) regeneration. To identify which factors are responsible for HF regeneration and why late-passage DPCs lose this potential, we collected 48-h-culture medium (CM) from both of passage 3 and 9 DPCs, and subcutaneously injected the DPC-CM into NU/NU mice...
2016: PloS One
https://www.readbyqxmd.com/read/27906477/blood-pressure-measurements-in-780-apparently-healthy-cats
#20
J R Payne, D C Brodbelt, V Luis Fuentes
BACKGROUND: Mean systolic blood pressure in apparently healthy cats has been reported as approximately 125 mmHg using direct assessment, but there is greater variability in reported values using indirect assessment. Increasing age and the white-coat effect are associated with increased systolic blood pressure. HYPOTHESIS/OBJECTIVES: To report Doppler-derived blood pressure measurements from a large population of apparently healthy cats and to assess epidemiologic factors associated with recorded blood pressures...
January 2017: Journal of Veterinary Internal Medicine
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