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https://www.readbyqxmd.com/read/28098753/reagent-less-and-robust-biosensor-for-direct-determination-of-lactate-in-food-samples
#1
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
#2
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 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28035582/endothelial-dysfunction-and-hypertension
#3
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%C3%A2-spores-expressing-the-vp28-antigen
#4
Kien-Cuong Pham, Hoa Thi Tuyet Tran, Cuong Van Doan, Phuoc Hong Le, Anh Thi Van Nguyen, Hoa Anh Nguyen, Huynh Anh Hong, Simon M Cutting, Tuan-Nghia Phan
In this study, Bacillus subtilis spores expressing a chimeric protein, CotB-VP28, was 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 x 10(9) cfu g(-1) 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). A 75% protection rate was obtained by continuous feeding of the spore coated pellets at >1 x 10(9) cfu g(-1) for 14 days prior to WSSV challenge and during all the post-challenge period...
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
#5
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
#6
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
#7
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
#8
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
#9
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...
December 6, 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27925275/nanoparticle-ag-co-exposure-reduces-the-accumulation-of-weathered-persistent-pesticides-by-earthworms
#10
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
#11
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
#12
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
#13
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...
December 1, 2016: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27904393/the-production-of-synbiotic-bread-by-microencapsulation
#14
Mojan Seyedain-Ardabili, Anousheh Sharifan, Babak Ghiassi Tarzi
Bread is a global staple food. Despite attempts to develop functional breads containing viable microorganisms, this has not been done yet because of the high temperature during baking. The aim of this study is to obtain synbiotic bread, hence hamburger bun and white pan bread were selected. Lactobacillus acidophilus LA-5 and L. casei 431 were encapsulated with calcium alginate and Hi-maize resistant starch via emulsion technique and coated with chitosan. The morphology and size of microcapsules were measured by scanning electron microscopy and particle size analyser...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27903314/pudong-white-pig-a-unique-genetic-resource-disclosed-by-sequencing-data
#15
Q Xiao, Z Zhang, H Sun, Q Wang, Y Pan
Pudong White (PW) pigs are distributed in the Taihu region of China and are characterized by their completely white coats. A heated debate concerning this genetic resource and its relationship to Taihu and western pig breeds has arisen, due to the white coat of the animals. To determine whether PW is a unique genetic resource, we performed a detailed assessment of the genetic relationships among PW, six breeds from the Taihu population and three western pig breeds, based on whole-genome single nucleotide polymorphism (SNP) data...
December 1, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27875335/flame-made-ultra-porous-tio2-layers-for-perovskite-solar-cells
#16
Yahuitl Osorio Mayon, The Duong, Noushin Nasiri, Thomas P White, Antonio Tricoli, Kylie R Catchpole
We report methyl ammonium lead iodide (MAPbI3) solar cells with an ultra-porous TiO2 electron transport layer fabricated using sequential flame aerosol and atomic layer depositions of porous and compact TiO2 layers. Flame aerosol pyrolysis allows rapid deposition of nanostructured and ultra-porous TiO2 layers that could be easily scaled-up for high-throughput low-cost industrial solar cell production. An efficiency of 13.7% was achieved with a flame-made nanostructured and ultra-porous TiO2 electrode that was coated with a compact 2 nm TiO2 layer...
December 16, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27863819/unfounded-concerns-about-the-use-of-automated-office-blood-pressure-measurement-in-sprint
#17
EDITORIAL
Martin G Myers, Norm R C Campbell
SPRINT reported significantly fewer cardiovascular events when patients with a higher cardiovascular risk were treated to a target systolic blood pressure (BP) of <120 versus <140 mm Hg. In SPRINT, BP was recorded using the automated office BP (AOBP) method, with multiple readings being taken automatically with the patient resting alone. This technique for BP measurement eliminates the white-coat effect and gives lower BP readings than conventional manual office BP. Critics have questioned if the readings were actually taken with the subject alone and have expressed concerns about the time taken to obtain the readings and the cost of automated sphygmomanometers...
December 2016: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/27843431/two-patients-with-large-colonic-lipomas-for-which-endoscopic-unroofing-was-ineffective
#18
Yuichi Tomiki, Koichiro Niwa, Kiichi Nagayasu, Yu Okazawa, Shingo Ito, Ryosuke Ichikawa, Hisashi Ro, Shun Ishiyama, Kiichi Sugimoto, Kazuhiro Sakamoto
Endoscopic unroofing is effective for treating large colonic lipomas. However, additional endoscopic resection is occasionally required when the outcomes of initial unroofing are incomplete. The colonoscopy of an 82-year-old woman with abdominal pain revealed a yellowish lipoma of about 20 mm in the transverse colon. The mass was treated by unroofing, but a follow-up colonoscopy 5 days later revealed residual lipoma. One month later, the regenerated surface had become covered with mucosa, and the status of the lipoma had returned to that before unroofing...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/27831935/white-light-emission-by-phonon-assisted-coherent-mixing-of-excitons-in-au8-cds-hybrid-nanorods
#19
S Rath, O Halder, A Pradhani, B Satpati, A Maity, T K Chini, N Gogurla, S K Ray
Gold cluster (Au8) coated CdS hybrid nanorods (HNRs), synthesized using a sonication assisted assembly route, exhibit phonon assisted coherent mixing of excitons. As observed from optical absorption, Raman scattering, x-ray diffraction and transmission electron microscopic studies, the Au8 modulates the crystal-and electronic-structure of the CdS nanorods, effecting enhancement of exciton-phonon (e-p) interactions. The e-p interaction and entropy effect mediated phase matching of the excitonic transitions, leading-via cooperative and coherent mixing of the excitons' color-to the emission of white light, has been confirmed from room temperature and time resolved photoluminescence measurements...
December 9, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27818895/magnesium-alloy-transfected-bmscs-bmp-2-composite-in-repair-of-femoral-head-necrosis-with-assessment-of-visceral-organs
#20
Kaka A A Katiella, Zhang Yanru, Zhang Hui
BACKGROUND: This study was designed to investigate the effect of BMSCs transfected BMP-2 composite with magnesium alloy rod in the repair of the femoral head necrosis in New Zealand white rabbits. Multifactorial but mostly traumatic, osteonecrosis of the femoral head account for 10 % of the 250,000 total hip arthroplasties done annually in the United States while its prevalence in most countries in not known. However, early intervention prior to collapse is critical to successful outcomes in joint preserving procedures...
2016: SpringerPlus
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