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https://www.readbyqxmd.com/read/28227804/novel-dry-electrodes-for-recording-electrodermal-activity
#1
Hugo F Posada-Quintero, Ryan Rood, Yeonsik Noh, Ken Burnham, John Pennace, Ki H Chon, Hugo F Posada-Quintero, Ryan Rood, Yeonsik Noh, Ken Burnham, John Pennace, Ki H Chon, Ryan Rood, John Pennace, Ki H Chon, Hugo F Posada-Quintero, Ken Burnham, Yeonsik Noh
Novel carbon/salt adhesive (CSA) electrodes have been found suitable for collecting electrodermal activity (EDA) signals. Ag/AgCl electrodes are considered the standard for collecting EDA signals, because it highly avoids electrodes' polarization. Ag is an expensive commodity. Furthermore, a hydrogel layer is needed for the Ag/AgCl electrodes to collect EDA signals. Adding hydrogel to the electrodes is a cumbersome process. Aforementioned circumstances highlight the need for a more accessible media to collect these signals, allowing EDA use to spread...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226278/quantitative-methylene-blue-decolourisation-assays-as-rapid-screening-tools-for-assessing-the-efficiency-of-catalytic-reactions
#2
Jan Kruid, Ronen Fogel, Janice Leigh Limson
Identifying the most efficient oxidation process to achieve maximum removal of a target pollutant compound forms the subject of much research. There exists a need to develop rapid screening tools to support research in this area. In this work we report on the development of a quantitative assay as a means for identifying catalysts capable of decolourising methylene blue through the generation of oxidising species from hydrogen peroxide. Here, a previously described methylene blue test strip method was repurposed as a quantitative, aqueous-based spectrophotometric assay...
February 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28226267/a-simple-lc-ms-ms-method-for-the-simultaneous-quantification-of-resveratrol-and-its-major-phase-ii-metabolites-assessment-of-their-urinary-and-biliary-excretions-in-rats
#3
Zhixia Qiu, Jiaojiao Yu, Yu Dai, Xijing Chen, Fang Huang, Ning Li
Trans-resveratrol (Res) is rapidly metabolized, extensively distributed into various tissues and mainly excreted by urine. The present study aimed to establish a simple LC-MS/MS method to simultaneously quantify Res and its major phase II metabolites (Res-3-O-β-d-glucuronide, R3G; Res-4'-O-β-d-glucuronide, R4'G; Res-resveratrol 3-sulfate, R3S; and Res-4'-sulfate, R4'S), and apply this method to assess their urinary and biliary excretions in rats. A simplified salting-out assisted liquid-liquid extraction (SALLE) strategy was developed to prepare samples with acetonitrile-methanol mixture (8:2, v/v) as extractant and ammonium acetate solution (10M) as salting-out reagent...
February 14, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28226230/genomics-physiology-and-molecular-breeding-approaches-for-improving-salt-tolerance
#4
Abdelbagi M Ismail, Tomoaki Horie
Salt stress reduces land and water productivity and contributes to poverty and food insecurity. Increased salinization caused by human practices and climate change is progressively reducing agriculture productivity despite escalating calls for more food. Plant responses to salt stress are fairly well understood, involving numerous critical processes that are each controlled by multiple genes. Knowledge of the critical mechanisms controlling salt uptake and exclusion from functioning tissues, signaling of salt stress, and the arsenal of protective metabolites is advancing...
February 22, 2017: Annual Review of Plant Biology
https://www.readbyqxmd.com/read/28226073/erratum-the-impact-of-the-reduction-of-sodium-content-in-processed-foods-in-salt-intake-in-brazil
#5
(no author information available yet)
[This corrects the article doi: 10.1590/0102-311X00064615].
February 13, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/28225793/vimentin-regulates-differentiation-switch-via-modulation-of-keratin-14-levels-and-their-expression-together-correlates-with-poor-prognosis-in-oral-cancer-patients
#6
Crismita Dmello, Sharada Sawant, Hunain Alam, Prakash Gangadaran, Saie Mogre, Richa Tiwari, Zinia D'Souza, Manish Narkar, Rahul Thorat, Komal Patil, Devendra Chaukar, Shubhada Kane, Milind Vaidya
Vimentin is an intermediate filament protein, predominantly expressed in cells of mesenchymal origin, although its aberrant expression is seen in many carcinomas during epithelial mesenchymal transition. In cancer, vimentin expression is associated with the transition from a more differentiated epithelial phenotype to a dedifferentiated state. In view of the perceived role of keratins (Ks) as regulators of differentiation in epithelia, it was important to understand whether vimentin modulates differentiation through the reprogramming of keratins, in transformed cells...
2017: PloS One
https://www.readbyqxmd.com/read/28225611/magneto-structural-correlations-in-pseudotetrahedral-forms-of-the-co-sph-4-2-complex-probed-by-magnetometry-mcd-spectroscopy-advanced-epr-techniques-and-ab-initio-electronic-structure-calculations
#7
Elizaveta A Suturina, Joscha Nehrkorn, Joseph M Zadrozny, Junjie Liu, Mihail Atanasov, Thomas Weyhermüller, Dimitrios Maganas, Stephen Hill, Alexander Schnegg, Eckhard Bill, Jeffrey R Long, Frank Neese
The magnetic properties of pseudotetrahedral Co(II) complexes spawned intense interest after (PPh4)2[Co(SPh)4] was shown to be the first mononuclear transition-metal complex displaying slow relaxation of the magnetization in the absence of a direct current magnetic field. However, there are differing reports on its fundamental magnetic spin Hamiltonian (SH) parameters, which arise from inherent experimental challenges in detecting large zero-field splittings. There are also remarkable changes in the SH parameters of [Co(SPh)4](2-) upon structural variations, depending on the counterion and crystallization conditions...
February 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28225606/effect-of-astringent-stimuli-on-salivary-protein-interactions-elucidated-by-complementary-proteomics-approaches
#8
Judith Delius, Guillaume Médard, Bernhard Kuster, Thomas Hofmann
The interaction of astringent substances with salivary proteins, which results in protein precipitation, is considered a key event in the molecular mechanism underlying the oral sensation of puckering astringency. As the chemical nature of orally active astringents is diverse and the knowledge on their interactions with salivary proteins rather fragmentary, human whole saliva samples were incubated with supra-threshold and iso-intensity solutions of the astringent polyphenol (-)-epigallocatechin gallate, the multivalent metal salt iron(III) sulfate, the amino-functionalized polysaccharide chitosan, and the basic protein lysozyme...
February 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28225285/multi-scale-modeling-of-the-effects-of-salt-and-perfume-raw-materials-on-the-rheological-properties-of-commercial-thread-like-micellar-solutions
#9
Xueming Tang, Weizhong Zou, Peter H Koenig, Shawn D McConaughy, Michael R Weaver, David Michael Eike, Michael J Schmidt, Ronald G Larson
We link micellar structures to rheological properties for two surfactant body-wash formulations at various concentrations of salts and perfume raw materials (PRMs) using molecular simulations and micellar-scale modeling as well as traditional surfactant packing arguments. The two body washes, named BW-1EO and BW-3EO, are composed of sodium lauryl ethylene glycol ether sulfate (SLEnS, where n is the average number of ethylene glycol repeat units), cocamidopropyl betaine (CAPB), ACCORD (which is a mixture of six PRMs), and NaCl salt...
February 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28225109/on-the-coordination-non-innocence-of-antimony-in-nickel-ii-complexes-of-the-tetradentate-o-ph2p-c6h4-3sb-ligand
#10
J Stuart Jones, Casey R Wade, Mengxi Yang, François P Gabbaï
In a continuation of our investigations into the unusual properties of antimony-based ligands, we have decided to investigate the structure of the complexes formed by the tetradentate ligands (o-(Ph2P)C6H4)3E (E = P (1), As (2), Sb (3)) with NiCl2. We observed that the structure of the resulting complexes depends on the nature of the central pnictogen atom E, with the phosphorus- and arsenic-based systems adopting ionic structures of the type [ClNi(o-(Ph2P)C6H4)3E][Cl] (E = P ([4][Cl]), As ([5][Cl])) while the known antimony complex ClNi(o-(Ph2P)C6H4)3SbCl (6-Cl) is molecular, with a chloride anion bound to the antimony atom trans from the nickel atom...
February 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28225041/pvn-blockade-of-p44-42-mapk-pathway-attenuates-salt-induced-hypertension-through-modulating-neurotransmitters-and-attenuating-oxidative-stress
#11
Hong-Li Gao, Xiao-Jing Yu, Kai-Li Liu, Xiao-Lian Shi, Jie Qi, Yan-Mei Chen, Yan Zhang, Juan Bai, Qiu-Yue Yi, Zhi-Peng Feng, Wen-Sheng Chen, Wei Cui, Jin-Jun Liu, Guo-Qing Zhu, Yu-Ming Kang
The imbalance of neurotransmitters and excessive oxidative stress responses contribute to the pathogenesis of hypertension. In this study, we determined whether blockade of p44/42 MAPK pathway in the hypothalamic paraventricular nucleus (PVN) ameliorates the development of hypertension through modulating neurotransmitters and attenuating oxidative stress. Dahl salt-sensitive (S) rats received a high-salt diet (HS, 8% NaCl) or a normal-salt diet (NS, 0.3% NaCl) for 6 weeks and were treated with bilateral PVN infusion of PD-98059 (0...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28225027/variable-salinity-responses-of-12-alfalfa-genotypes-and-comparative-expression-analyses-of-salt-response-genes
#12
Devinder Sandhu, Monica V Cornacchione, Jorge F S Ferreira, Donald L Suarez
Twelve alfalfa genotypes that were selected for biomass under salinity, differences in Na and Cl concentrations in shoots and K/Na ratio were evaluated in this long-term salinity experiment. The selected plants were cloned to reduce genetic variability within each genotype. Salt tolerance (ST) index of the genotypes ranged from 0.39 to 1. The most salt-tolerant genotypes SISA14-1 (G03) and AZ-90ST (G10), the top performers for biomass, exhibited the least effect on shoot number and height. SISA14-1 (G03) accumulated low Na and Cl under salinity...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224920/genetic-engineering-of-the-biosynthesis-of-glycinebetaine-leads-to-alleviate-salt-induced-potassium-efflux-and-enhances-salt-tolerance-in-tomato-plants
#13
Dandan Wei, Wen Zhang, Cuicui Wang, Qingwei Meng, Gang Li, Tony H H Chen, Xinghong Yang
Tomato (Solanum lycopersicum cv. 'Moneymaker') was transformed with the choline oxidase gene codA from Arthrobacter globiformis, which was modified to allow for targeting to both chloroplasts and the cytosol. Glycine betaine (GB) was accumulated in transformed plants, while no detectable GB was found in wild-type (WT) plants. Compared to WT plants, transgenic lines showed significantly higher photosynthetic rates (Pn) and antioxidant enzyme activities and lower reactive oxygen species (ROS) accumulation in the leaves when exposed to salt stress...
April 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28224905/emerging-trends-in-biosensing-using-stripping-voltammetric-detection-of-metal-containing-nanolabels-a-review
#14
REVIEW
Christos Kokkinos, Anastasios Economou
Over the last years, nanomaterials have found many applications in the development of electrochemical biosensors. Among other functions, metal nanoparticles (NPs) and quantum dots (QDs) (semiconducting nanocrystals composed of metal salts) are increasingly being used as voltammetric labels in affinity biosensing. Labeling is based on the attachment of the label(s) on the target biomolecules or on a biorecognition reporting probe. After an appropriate specific affinity interaction between the target and the reporting probe, the metallic nanolabels are converted to the respective cations which are quantified by a voltammetric technique...
April 8, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28224892/construction-and-in-vitro-evaluation-of-enzyme-nanoreactors-based-on-carboxymethyl-chitosan-for-arginine-deprivation-in-cancer-therapy
#15
Tian Zeng, Yi Zhang, Qiongjiao Yan, Zhijun Huang, Ling Zhang, Xiaozhe Yi, Junrong Chen, Guanghua He, Yihua Yin
In this study, a pH-induced morphological transition from micelles to vesicles for an amphiphilic photo cross-linkable biocopolymer (Az-NaCMCS), synthesized by mixing azidobenzaldehyde (Az) and an aqueous solution of carboxymethyl chitosan sodium salt (NaCMCS), was used for encapsulation of l-arginine deiminase (ADI). The aqueous solution of enzyme-loaded vesicles obtained was followed by UV-irradiation to result in shell cross-linked enzyme nanoreactors. The nanoreactors were characterized by TEM and DLS. Its encapsulation efficiency and loading capacity were determined...
April 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28224795/synthesis-of-n-aryl-oxindole-nitrones-through-metal-free-selective-n-arylation-process
#16
Si-Yi Wu, Xiao-Pan Ma, Cui Liang, Dong-Liang Mo
An efficient selective N-arylation of 3-(hydroxyimino)indolin-2-ones with diaryliodonium salts to prepare (Z)-N-aryl oxindole nitrones has been achieved under simple base-mediated conditions. The reaction tolerated a variety of diaryliodonium salts with diverse and sensitive functional groups. Studies on the oxime structures revealed that the pyrroline ring and carbonyl group in 3-(hydroxyimino)indolin-2-ones played important roles in the selective N-arylation process. The N-aryl oxindole nitrones could be prepared rapidly and easily at the gram-scale...
February 22, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28224655/rna-seq-analysis-of-transcriptional-change-in-the-freshwater-mussel-elliptio-complanata-after-environmentally-relevant-sodium-chloride-exposure
#17
Laura S Robertson, Heather S Galbraith, Deborah Iwanowicz, Carrie J Blakeslee, R Scott Cornman
To identify potential biomarkers of salt stress in a freshwater sentinel species, we examined transcriptional responses of the common mussel Elliptio complanata to controlled NaCl exposures. RNA-Seq of mantle tissue identified 481 transcripts differentially expressed in adult mussels exposed to 2 ppt NaCl (1.2 ppt chloride) for seven days, of which 290 had non-overlapping intervals. Differentially expressed gene categories included ion and transmembrane transport, oxidoreductase activity, maintenance of protein folding, and amino acid metabolism...
February 22, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28224615/global-trends-in-nasopharyngeal-cancer-mortality-since-1970-and-predictions-for-2020-focus-on-low-risk-areas
#18
Greta Carioli, Eva Negri, Daisuke Kawakita, Werner Garavello, Carlo La Vecchia, Matteo Malvezzi
Nasopharyngeal cancer (NPC) mortality shows great disparity between endemic high risk areas, where non-keratinizing carcinoma (NKC) histology is prevalent, and non-endemic low risk regions, where the keratinizing squamous cell carcinoma (KSCC) type is more frequent. We used the World Health Organization database to calculate NPC mortality trends from 1970 to 2014 in several countries worldwide. For the EU, the USA and Japan, we also predicted trends to 2020. In 2012 the highest age-standardized (world standard) rates were in Hong Kong (4...
February 22, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28224254/iodine-deficiency-status-in-the-who-eastern-mediterranean-region-a-systematic-review
#19
REVIEW
Masoumeh Mohammadi, Fereidoun Azizi, Mehdi Hedayati
Iodine deficiency is a global public health issue because iodine plays a major role in the thyroid hormone synthesis and is essential for normal neurological development. This review summarizes the publications on iodine status in the WHO Eastern Mediterranean Region (EMR) countries. All related studies available in main national and international databases were systematically searched using some specific keywords to find article published between 1909 and 2015. The prevention of iodine deficiency disorders (IDDs) in the WHO EMR countries is currently under control without significant side effects...
February 21, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28224161/f-element-metalated-dipyrrins-synthesis-and-characterization-of-a-family-of-uranyl-bis-dipyrrinate-complexes
#20
Duer Bolotaulo, Alejandro Metta-Magaña, Skye Fortier
Using an improved, chromatography-free dipyrrin synthesis, the α,β-unsubstituted dipyrrins [RC(C4H2N)2H] (2) (R = tolyl (2toly(l)), p-OMe-C6H4 (2anis), mesityl (2mes), ferrocenyl (2Fc)) were isolated in good to excellent yields. Deprotonation of 2 with Na[N(SiMe3)2] gives the alkali metal salts [Na(DME)n][RC(C4H2N)2] (3) which reacts with UO2Cl2(THF)3 to give the uranyl bis(dipyrrinates) UO2[RC(C4H2N)2]2(L) (L = THF (4R-THF); DMAP (4R-DMAP)) (R = tolyl, p-OMe-C6H4, mesityl, ferrocenyl). The THF adducts, 4R-THF, are unstable in aromatic and nonpolar solvents and rapidly decompose to 2 and an intractable uranium-containing solid...
February 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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