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https://www.readbyqxmd.com/read/29141008/smartphone-based-quantitative-measurements-on-holographic-sensors
#1
Gita Khalili Moghaddam, Christopher Robin Lowe
The research reported herein integrates a generic holographic sensor platform and a smartphone-based colour quantification algorithm in order to standardise and improve the determination of the concentration of analytes of interest. The utility of this approach has been exemplified by analysing the replay colour of the captured image of a holographic pH sensor in near real-time. Personalised image encryption followed by a wavelet-based image compression method were applied to secure the image transfer across a bandwidth-limited network to the cloud...
2017: PloS One
https://www.readbyqxmd.com/read/29139486/simple-and-rapid-colorimetric-detection-of-melanoma-circulating-tumor-cells-using-bifunctional-magnetic-nanoparticles
#2
Junrong Li, Jing Wang, Yuling Wang, Matt Trau
Circulating tumor cells (CTCs) are a promising biomarker for monitoring cancer metastasis and therapy response. However, the rarity and inherent fragility of CTCs pose great challenges for CTC detection. Currently, CTC detection requires advanced instruments that might be inaccessible in most hospitals or labs. To allow simple and rapid CTC detection, we propose a sensor platform that relies only on the intrinsic properties of magnetic nanoparticles (MNPs) including rapid separation as well as nanozyme activity...
November 15, 2017: Analyst
https://www.readbyqxmd.com/read/29139350/nemorella-caseinilytica-gen-nov-sp-nov-isolated-from-forest-soil
#3
Dhiraj Kumar Chaudhary, Ram Hari Dahal, Jaisoo Kim
Two novel strains, J116-2(T) and J116-1, were isolated from forest soil and were taxonomically characterized by a polyphasic approach. Both strains were yellow-coloured, Gram-stain-negative, strictly aerobic, non-motile and rod-shaped bacteria. The strains were non-sporulating, catalase-positive and oxidase-negative. Strains J116-2(T) and J116-1 were able to grow at 20-32 °C, pH 6.0-8.5, and 0-0.5 % (w/v) NaCl concentration. Based on 16S rRNA gene sequence analyses, strains J116-2(T) and J116-1 formed a distinct lineage within the family Chitinophagaceae of the phylum Bacteroidetes and were closely related to genera Taibaiella (89...
November 15, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29139128/development-of-secondary-sexual-characters-and-their-relationship-to-ontogeny-and-seasonal-reproductive-period-in-hyphessobrycon-igneus-ostariophysi-characiformes
#4
L Schönhofen Longoni, J Giora, C Bernhardt Fialho
Sexual dimorphism in size, anal-fin shape and coloration of Hyphessobrycon igneus, Characidae, were examined. Males were more frequent at larger body sizes, confirming body size as a sexually dimorphic trait. Anal-fin shape and the colour of all fins were the same for females and juveniles, differing only in adult males. Likewise, only adult males had bony hooks on fin rays; larger and more sexually mature males had the most numerous and developed hooks and hooks were most developed in degree and number during peak reproductive periods...
November 15, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/29136905/evaluation-of-electrochemical-uv-vis-and-raman-spectroelectrochemical-detection-of-naratriptan-with-screen-printed-electrodes
#5
Carla Navarro Hernández, Daniel Martín-Yerga, María Begoña González-García, David Hernández-Santos, Pablo Fanjul-Bolado
Naratriptan, active pharmaceutical ingredient with antimigraine activity was electrochemically detected in untreated screen-printed carbon electrodes (SPCEs). Cyclic voltammetry and differential pulse voltammetry were used to carry out quantitative analysis of this molecule (in a Britton-Robinson buffer solution at pH 3.0) through its irreversible oxidation (diffusion controlled) at a potential of +0.75V (vs. Ag pseudoreference electrode). Naratriptan oxidation product is an indole based dimer with a yellowish colour (maximum absorption at 320nm) so UV-VIS spectroelectrochemistry technique was used for the very first time as an in situ characterization and quantification technique for this molecule...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136839/chromisense-a-colourimetric-lab-on-a-disc-sensor-for-chromium-speciation-in-water
#6
G Duffy, I Maguire, Brendan Heery, Pauline Gers, J Ducrée, F Regan
The development of a centrifugal device for quantitative analysis of both chromium (III) and (VI) species in water is reported. ChromiSense is a colourimetric sensor system that has been applied to the measurement of chromium in spiked river water samples. For analysis, the sample is loaded into a reservoir on the disposable microfluidic disc, along with reagents. A centrifugal force is created by spinning the disc to pump liquids through microchannels, causing them to mix and react to form a coloured product...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136828/compact-detectors-made-of-paired-leds-for-photometric-and-fluorometric-measurements-on-paper
#7
Marta Fiedoruk-Pogrebniak, Mateusz Granica, Robert Koncki
The utility of strikingly simple and cheap optoelectronic detectors operating according to a Paired-Emitter-Detector-Diode (PEDD) principle for microfluidic paper-based analytical devices (μPAD) has been experimentally confirmed. The prototypes of these compact detectors have been made of only two customary light emitting diodes without any additional optical parts like lens, filters, fibers etc. Moreover, for their operation economic and portable equipment is required (low-power circuit and ordinary voltmeter)...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136579/the-effectiveness-and-practicality-of-using-simultaneous-superglue-iodine-fuming-method-for-fingermark-development-on-low-yield-leather-surfaces-a-feasibility-study
#8
Xiaochun Zheng, Kang Li, Jingyang Xu, Zhen Lin
This research successfully demonstrated the first use of simultaneous superglue & iodine fuming on leather surfaces compared to superglue, iodine, superglue-iodine and iodine-superglue fuming methods which typically give low fingermark yields. A novel fuming chamber was developed and used for simultaneous superglue & iodine fuming. Results show that the simultaneous fuming method produced significantly better enhancement for light-coloured leather substrates relative to other processing procedures, but was found to be ineffective on dark-coloured leather...
November 7, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29136096/alcohol-warning-label-awareness-and-attention-a-multi-method-study
#9
Cuong Pham, Sharyn Rundle-Thiele, Joy Parkinson, Shanshi Li
Aims: Evaluation of alcohol warning labels requires careful consideration ensuring that research captures more than awareness given that labels may not be prominent enough to attract attention. This study investigates attention of current in market alcohol warning labels and examines whether attention can be enhanced through theoretically informed design. Attention scores obtained through self-report methods are compared to objective measures (eye-tracking). Methods: A multi-method experimental design was used delivering four conditions, namely control, colour, size and colour and size...
November 9, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/29135078/molecular-phylogeny-of-entomobrya-collembola-entomobryidae-from-china-colour-pattern-groups-and-multiple-origins
#10
Yinhuan Ding, Daoyuan Yu, Weibo Guo, Jiannan Li, Feng Zhang
Highly diversified colourations among springtails (Collembola) have been widely used for species diagnosis, but their phylogenetic significance is poorly known. We addressed this issue in the largest Entomobryinae genus Entomobrya, which possesses variable colour patterns among species. The relationships within the genus and to other genera were also rarely studied. Based on material mainly from China, we have conducted a multilocus phylogeny and topology tests with likelihood and Bayesian algorithms, and accordingly demonstrated the non-monophyly of Chinese Entomobrya...
November 14, 2017: Insect Science
https://www.readbyqxmd.com/read/29134755/analysis-of-the-influence-of-collagen-fibres-in-the-dermis-on-skin-optical-reflectance-by-monte-carlo-simulation-in-a-nine-layered-skin-model
#11
Y Masuda, Y Ogura, Y Inagaki, T Yasui, Y Aizu
BACKGROUND: Collagen fibres in the dermis play an important structural role in the skin. Age-related changes to these fibres cause wrinkles and slackness of facial skin. However, it is not clear how dermal collagen fibres affect skin colour. The purpose of this study was to clarify the influence of altered collagen fibres on skin colour, using both experimental measurement of fibre density and Monte Carlo simulations in an optical model of skin. METHODS: Reflection spectra were measured from the cheeks of 12 Japanese women (22-65 years old) by spectral colorimeter...
November 13, 2017: Skin Research and Technology
https://www.readbyqxmd.com/read/29134206/azulene-boronate-esters-colorimetric-indicators-for-fluoride-in-drinking-water
#12
Carlos M López-Alled, Adrian Sanchez-Fernandez, Karen J Edler, Adam C Sedgwick, Steven D Bull, Claire L McMullin, Gabriele Kociok-Köhn, Tony D James, Jannis Wenk, Simon E Lewis
Low cost and in situ fluoride detection by non-experts is important for the determination of drinking water safety in developing countries. Colour reagents can provide results quickly without expensive equipment, but colorimetric fluoride indicators are often nonspecific, complex to use or do not work in water. Here we show that azulene-boronate indicators respond selectively to fluoride at concentrations relevant to the WHO limit of 1.5 mg L(-1).
November 14, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29134081/identification-of-the-beagle-2-lander-on-mars
#13
J C Bridges, J Clemmet, M Croon, M R Sims, D Pullan, J-P Muller, Y Tao, S Xiong, A R Putri, T Parker, S M R Turner, J M Pillinger
The 2003 Beagle 2 Mars lander has been identified in Isidis Planitia at 90.43° E, 11.53° N, close to the predicted target of 90.50° E, 11.53° N. Beagle 2 was an exobiology lander designed to look for isotopic and compositional signs of life on Mars, as part of the European Space Agency Mars Express (MEX) mission. The 2004 recalculation of the original landing ellipse from a 3-sigma major axis from 174 km to 57 km, and the acquisition of Mars Reconnaissance Orbiter High Resolution Imaging Science Experiment (HiRISE) imagery at 30 cm per pixel across the target region, led to the initial identification of the lander in 2014...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29133987/a-review-of-the-land-snail-genus-alycaeus-gastropoda-alycaeidae-in-peninsular-malaysia
#14
Junn Kitt Foon, Thor-Seng Liew
A total of 11 species and 1 subspecies of Alycaeus were recognised in Peninsular Malaysia prior to this study. However, these taxonomic descriptions of Alycaeus taxa were based on limited numbers of examined materials, where a whole spectrum of morphological variations were not accounted for and diagnoses were often provided without sufficient comparison between congeners from across the peninsula. We reviewed Peninsular Malaysian Alycaeus through the examination of 5137 specimens in 522 collection lots from all major museum collections and literature sources...
2017: ZooKeys
https://www.readbyqxmd.com/read/29130975/karyotypes-versus-genomes-the-nymphalid-butterflies-melitaea-cinxia-danaus-plexippus-and-d-chrysippus
#15
Walther Traut, Virpi Ahola, David A S Smith, Ian J Gordon, Richard H Ffrench-Constant
The number of sequenced lepidopteran genomes is increasing rapidly. However, the corresponding assemblies rarely represent whole chromosomes and generally also lack the highly repetitive W sex chromosome. Knowledge of the karyotypes can facilitate genome assembly and further our understanding of sex chromosome evolution in Lepidoptera. Here, we describe the karyotypes of the Glanville fritillary Melitaea cinxia (n = 31), the monarch Danaus plexippus (n = 30), and the African queen D. chrysippus (2n = 60 or 59, depending on the source population)...
November 2, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/29130742/internal-roosting-location-is-associated-with-differential-use-of-the-outdoor-range-by-free-range-laying-hens
#16
I C Pettersson, C A Weeks, K I Norman, T G Knowles, C J Nicol
1. In commercial free-range systems for laying hens, popholes to the outdoor range are often installed on one side of the house only. In multi-tier systems, it is possible that some individuals fail to access the range due to internal barriers to movement. 2. Five commercial multi-tier flocks from different units were studied. For each flock, two different colour markers were used to distinguish 200 birds roosting near the popholes (NP-Roost) and 200 birds roosting far from the popholes (FP-Roost) at night...
November 13, 2017: British Poultry Science
https://www.readbyqxmd.com/read/29130647/randomized-controlled-trial-of-electro-stimulation-therapies-to-modulate-retinal-blood-flow-and-visual-function-in-retinitis-pigmentosa
#17
Ava K Bittner, Kenneth Seger, Rachel Salveson, Samantha Kayser, Natalia Morrison, Patricia Vargas, Deborah Mendelsohn, Jorge Han, Hua Bi, Gislin Dagnelie, Alexandra Benavente, Jessica Ramella-Roman
PURPOSE: We examined changes in visual function and ocular and retinal blood flow (RBF) among retinitis pigmentosa (RP) participants in a randomized controlled trial of electro-stimulation therapies. METHODS: Twenty-one RP participants were randomized (1:1:1) to transcorneal electrical stimulation (TES) at 6 weekly half-hour sessions, electro-acupuncture or inactive laser acupuncture (sham control) at 10 half-hour sessions over 2 weeks. Early Treatment of Diabetic Retinopathy Study (ETDRS) visual acuity (VA), quick contrast sensitivity function, Goldmann visual fields, AdaptDx scotopic sensitivity, spectral flow and colour Doppler imaging of the central retinal artery (CRA), and RBF in macular capillaries were measured twice pre-treatment, after 2 TES sessions, within a week and a month after intervention completion...
November 11, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29130331/pasture-multi-enzymes-benzoic-acid-and-essential-oils-positively-influence-performance-intestinal-organ-weight-and-egg-quality-in-free-range-laying-hens
#18
Z Iqbal, J Roberts, R A Perez-Maldonado, F Goodarzi Boroojeni, R A Swick, I Ruhnke
1. The objective of this study was to investigate the effect of range type, multi-enzymes applications and a combination of benzoic acid and essential oils on the productive performance, organ weight and egg quality of free-range laying hens. 2. Three hundred laying hens were evaluated for the short-term (6 weeks) and long-term (12 weeks) effects of range type (G = no pasture, P = pasture) and feed additives (T1 = control; T2 = betaglucanse/pectinase/protease; T3 = benzoic acid/essential oils). Body weight, feed intake (FI), feed conversion ratio (FCR), egg production (EP), and digestive organs weight and egg quality (EQ) were evaluated...
November 13, 2017: British Poultry Science
https://www.readbyqxmd.com/read/29129784/impact-of-prosthodontic-rehabilitation-on-the-masticatory-performance-of-partially-dentate-older-patients-can-it-predict-nutritional-state-results-from-a-rct
#19
Sara Wallace, Stefanie Samietz, Meriem Abbas, Gerald McKenna, Jayne V Woodside, Martin Schimmel
OBJECTIVES: With a decreased number of teeth, a reduction in chewing function can contribute to changes in food choices and ultimately impact on overall nutritional status. This study compared the impact of two tooth replacement strategies for partially dentate older patients on masticatory performance and nutritional status. METHODS: Patients aged 65 years and older were randomly allocated to two different treatment groups. For the RPDP-group (removable partial dental prostheses) each participant was restored to complete arches with cobalt-chromium removable prostheses to replace missing teeth...
November 9, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29129593/emotional-priming-depends-on-the-degree-of-conscious-experience
#20
Michael Lohse, Morten Overgaard
Most experiments in consciousness research assume that awareness is a dichotomous 'either/or' phenomenon. However, participants can distinguish multiple levels of subjective experience of simple features (colour, shape etc.), which correlate with their performance in different tasks. As experiments showing multiple levels of perceptual awareness question the widespread idea that many forms of perception can occur unconsciously, we investigated emotional priming combined with methods able to measure small variations in subjective experience...
November 9, 2017: Neuropsychologia
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