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https://www.readbyqxmd.com/read/30114039/index-for-the-evaluation-of-the-general-photometric-performance-of-photometers
#1
A Ferrero, J L Velázquez, A Pons, J Campos
The General V(λ) Mismatch Index, f1 ' , was defined for a general description of the photometric performance of photometers. This index is widely-used in photometry, and it is very relevant for selecting photometers for low-uncertainty photometric measurements. It quantifies the spectral mismatch between the relative spectral responsivity of a photometer and the luminous efficiency function for photopic vision, V(λ). The linear correlation between the real general photometric measurement error and f1 ' of 77 photometers was studied for four sets of light sources: R, G and B LEDs (narrowband spectral power distributions, SPDs), blackbodies at different colour temperatures (broadband SPDs), phosphor-based LEDs at different correlated color temperatures (SPDs with narrow- and broad-band features), and a mixture of blackbodies and phosphor-based LED sources...
July 9, 2018: Optics Express
https://www.readbyqxmd.com/read/30113835/thiols-as-hydrogen-bond-acceptors-and-donors-spectroscopy-of-2-phenylethanethiol-complexes
#2
Isabella Antony Lobo, Patrick A Robertson, Luigi Villani, David J D Wilson, Evan G Robertson
Evidence and understanding of sulfur-centred hydrogen bonding, especially where the donor is a thiol, lags far behind that for conventional OH interactions. To help address this deficiency, conformer specific IR spectra of 2-phenylethanethiol (PET) and associated 1:1 solvent complexes have been measured in SH, OH and CH stretch regions using Resonant-Two-Photon-Ionisation (R2PI) and IR-UV ion dip spectroscopic techniques. The aromatic and aliphatic CH stretch regions show signature differences between anti and gauche conformers...
August 16, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/30113576/-the-method-for-the-simultaneous-registration-of-several-frequency-specific-short-latency-auditory-brain-stem-responses
#3
O A Belov, A A Yasinskaya, G A Tavartkiladze
The present article was designed to describe the newly proposed method for the simultaneous registration of several frequency-specific short latency auditory evoked potentials based on the use of the sequences of the maximum length. The mutual masking between he sequences of different frequency bands was investigated. The possibility for the simultaneous registration of five responses to the stimuli with the central frequency of 0.5, 1, 2, 4, and 8 kHz has ben demonstrated.
2018: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/30113041/innovative-hptlc-method-with-fluorescence-detection-for-assessment-of-febuxostat-montelukast-combination-and-study-of-their-protective-effects-against-gouty-arthritis
#4
Noha M Hosny, Noha N Atia, Samia M El-Gizawy, Dalia M Badary, Mohammad S Hareedy
The present study was designed to evaluate the potential protective effects of the cysteinyl leukotriene receptor blocker montelukast (MNK) and the xanthine oxidase inhibitor febuxostat (FBX) and their combination on a model of acute gouty arthritis induced by intraarticular injection of monourate sodium crystal (MUC) injection in rats. Additionally, we established an HPTLC method for the quantitative determination of both drugs simultaneously and applied this method to detect this combination in rat plasma...
August 16, 2018: Analyst
https://www.readbyqxmd.com/read/30112814/time-frequency-approaches-to-investigating-changes-in-feedback-processing-during-childhood-and-adolescence
#5
M E Bowers, G A Buzzell, E M Bernat, N A Fox, T V Barker
Processing feedback from the environment is an essential function during development to adapt behavior in advantageous ways. One measure of feedback processing, the feedback negativity (FN), is an ERP observed following the presentation of feedback. Findings detailing developmental changes in the FN have been mixed, possibly due to limitations in traditional ERP measurement methods. Recent work shows that both theta and delta frequency activity contribute to the FN; utilizing time-frequency methods to measure change in power and phase in these frequency bands may provide more accurate representation of feedback processing development in childhood and adolescence...
August 15, 2018: Psychophysiology
https://www.readbyqxmd.com/read/30111991/pharmacological-evaluation-of-selected-medicinal-plants-used-in-the-management-of-oral-and-skin-infections-in-ebem-ohafia-district-abia-state-nigeria
#6
Blessing O Oyedemi, Sunday O Oyedemi, Johnson V Chibuzor, Ifeoma I Ijeh, Roger M Coopoosamy, Ayobami O Aiyegoro
Oral and skin infections contribute significantly to the global health challenges responsible for the current trend of increased morbidity and premature death. The purpose of this study was to document medicinal plants used in the management of oral and skin infections in Ebem-Ohafia Local Government Area (LGA), Abia State, and to characterize the in vitro antioxidant and antibacterial activity. The thin layer chromatography (TLC) profiling of ten of the selected folklore medicine was carried out using a various solvent system of different polarity index...
2018: TheScientificWorldJournal
https://www.readbyqxmd.com/read/30111781/curve-fitting-techniques-improve-the-mid-infrared-analysis-of-soil-organic-carbon-a-case-study-for-brookston-clay-loam-particle-size-fractions
#7
Ruqin Fan, Xueming Yang, Craig F Drury, Zhenhua Zhang
Few studies have evaluated structural features of soil organic carbon (SOC) in different soil particle fractions, especially SOC changes induced by tillage, using Fourier transformed mid-infrared (MIR) spectroscopy. To make a contribution in this context, soil samples of a Brookston clay loam (mesic Typic Argiaquoll) with averaged pH and organic matter concentration at 7.28 and 43.9 g kg-1 , respectively, were collected from short-term no-tillage (NT97) and mouldboard plow (CT97) treatments initiated in 1997 and long-term no-tillage (NT83) and mouldboard plow (CT83) treatments initiated in 1983 under a corn-soybean rotation, and were separated into sand, silt, and clay fractions using sonication...
August 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30111475/-a-clinical-and-genetic-analysis-of-a-child-with-supernumerary-marker-chromosome-15-caused-mental-retardation-intractable-epilepsy-and-central-precocious-puberty
#8
Zhi-Jie Gao, Qian Jiang, Qian Chen, Jing-Min Wang, Hong Pan
Supernumerary marker chromosome 15 is a rare chromosome abnormality. This paper reports the clinical diagnosis and treatment, as well as genetic defects, of a child with supernumerary marker chromosome 15. The patient was a 9.5-year-old girl who had mental and motor retardation since infancy, breast development at the age of 7 years, and seizures at the age of 8.5 years. Seizures occurred with various features and could not be controlled by a variety of antiepileptic drugs. No abnormalities were found by brain magnetic resonance imaging...
August 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/30110756/multistable-dissipative-breathers-and-collective-states-in-squid-lieb-metamaterials
#9
N Lazarides, G P Tsironis
A SQUID (Superconducting QUantum Interference Device) metamaterial on a Lieb lattice with nearest-neighbor coupling supports simultaneously stable dissipative breather families which are generated through a delicate balance of input power and intrinsic losses. Breather multistability is possible due to the peculiar snaking flux amplitude-frequency curve of single dissipative-driven SQUIDs, which for relatively high sinusoidal flux field amplitudes exhibits several stable and unstable solutions in a narrow frequency band around resonance...
July 2018: Physical Review. E
https://www.readbyqxmd.com/read/30109548/rapid-simple-and-potentially-universal-method-for-dna-extraction-from-opuntia-spp-fresh-cladode-tissues-suitable-for-pcr-amplification
#10
Joana Raimundo, Carlos Manuel Gaspar Reis, Maria Margarida Ribeiro
In Opuntia spp., the cladode tissues contain many polysaccharides and secondary metabolites that interfere with obtaining high-quality deoxyribonucleic acid (DNA), using currently available methods. To circumvent this problem, three commercial kits, three modified versions of the conventional cetyltrimethylammonium bromide method (CTAB) method and one combined method were tested in Opuntia ficus-indica, O. robusta, O. dillenii and O. elata species. We obtained a rapid and simple protocol that allows the extraction of DNA from all the tested species with good DNA yield and purity, namely, the combined method...
August 14, 2018: Molecular Biology Reports
https://www.readbyqxmd.com/read/30108216/a-possible-candidate-for-triply-degenerate-point-fermions-in-trigonal-layered-ptbi-2
#11
Wenshuai Gao, Xiangde Zhu, Fawei Zheng, Min Wu, Jinglei Zhang, Chuanying Xi, Ping Zhang, Yuheng Zhang, Ning Hao, Wei Ning, Mingliang Tian
Triply degenerate point (TP) fermions in tungsten-carbide-type materials (e.g., MoP), which represent new topological states of quantum matter, have generated immense interest recently. However, the TPs in these materials are found to be far below the Fermi level, leading to the TP fermions having less contribution to low-energy quasiparticle excitations. Here, we theoretically predict the existence of TP fermions with TP points close to the Fermi level in trigonal layered PtBi2 by ab initio calculations, and experimentally verify the predicted band topology by magnetotransport measurements under high magnetic fields up to 40 T...
August 14, 2018: Nature Communications
https://www.readbyqxmd.com/read/30107158/culture-characters-genetic-background-estrogen-progesterone-receptor-expression-and-tumorigenic-activities-of-frequently-used-sixteen-endometrial-cancer-cell-lines
#12
Wanglei Qu, Yinling Zhao, Xuan Wang, Yaozhi Qi, Clare Zhou, Ying Hua, Jianqing Hou, Shi-Wen Jiang
BACKGROUND: This study aimed to determine the in vitro and in vivo properties of sixteen frequently used endometrial cancer (EC) cell lines, including the cell proliferation rate, morphology, hormone receptor expression patterns, PTEN, hMLH1 expression, p53 mutation, karyotype, and tumorigenicity in mouse xenograt model. METHODS: Twelve type I (AN3, ECC-1, EN, EN-1, EN-11, HEC-1A, HEC1B, Ishikawa, KLE, MFE-280, MFE-296, MFE-319) and four type II (ARK1, ARK2, HEC-155/180, SPEC-2) endometrial cancer cell lines were studied...
August 11, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/30106076/boosting-visible-light-photocatalytic-h-2-evolution-via-uio-66-nh-2-octahedrons-decorated-with-ultrasmall-nio-nanoparticles
#13
Cong-Cong Shen, Ya-Nan Liu, Xin Wang, Xiao-Xiang Fang, Zhi-Wei Zhao, Nan Jiang, Liu-Bo Ma, Xiao Zhou, Tuck-Yun Cheang, An-Wu Xu
Metal-organic framework (MOF)-based materials possess numerous attractive characteristics; however, the application of MOF-based photocatalysts in the area of visible-light photocatalytic H2 evolution is still in its infancy. Herein, we develop a series of novel UiO-66-NH2-based composites with embedded NiO nanoparticles via solvothermal treatment and subsequent calcination. Their characterizations demonstrate intimate lattice-level contacts between UiO-66-NH2 photocatalysts and NiO nanoparticles. By optimizing each component, even without noble metal loading, the U6N-NiO-2 sample (the weight ratio of NiO to U6N-NiO-2 is theoretically calculated to be ca...
August 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30105087/karyotype-characteristics-and-chromosomal-polymorphism-of-chironomus-annularius-sensu-strenzke-1959-diptera-chironomidae-from-the-caucasus-region
#14
Mukhamed Kh Karmokov
The study presents data on the karyotype characteristics and features of chromosomal polymorphism of Chironomus "annularius" sensu Strenzke (1959) (Diptera, Chironomidae) from three populations of the Caucasus region (South and Central Caucasus, and Eastern Ciscaucasia). We found 17 banding sequences in the Caucasian populations. We observed inversion polymorphism in almost all chromosome arms except for arm G. The genetic distances between all the studied populations of Ch. "annularius" were calculated using Nei criteria (1972)...
2018: Comparative Cytogenetics
https://www.readbyqxmd.com/read/30104995/the-role-of-gamma-oscillations-during-integration-of-metaphoric-gestures-and-abstract-speech
#15
Yifei He, Arne Nagels, Matthias Schlesewsky, Benjamin Straube
Metaphoric (MP) co-speech gestures are commonly used during daily communication. They communicate about abstract information by referring to gestures that are clearly concrete (e.g., raising a hand for "the level of the football game is high"). To understand MP co-speech gestures, a multisensory integration at semantic level is necessary between abstract speech and concrete gestures. While semantic gesture-speech integration has been extensively investigated using functional magnetic resonance imaging, evidence from electroencephalography (EEG) is rare...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/30104209/isomeric-separation-and-recognition-of-anionic-and-zwitterionic-n-glycans-from-royal-jelly-glycoproteins
#16
Alba Hykollari, Daniel Malzl, Barbara Eckmair, Jorick Vanbeselaere, Patrick Scheidl, Chunsheng Jin, Niclas G Karlsson, Iain B H Wilson, Katharina Paschinger
Royal jelly has received attention due to its necessity for the development of queen honeybees as well as claims of benefits on human health; this product of the hypopharyngeal glands of worker bees contains a large number of proteins, some of which have been claimed to have various biological effects only in their glycosylated state. However, although there have been glycomic and glycoproteomic analyses in the past, none of the glycan structures previously defined would appear to have potential to trigger specific biological functions...
August 13, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/30102556/identification-and-multilineage-potential-research-of-a-novel-type-of-adipose-derived-mesenchymal-stem-cells-from-goose-inguinal-groove
#17
Caiyun Ma, Yu Guo, Hebao Wen, Yanjie Zheng, Leiqi Tan, Xiangchen Li, Chunjing Wang, Weijun Guan, Changqing Liu
Adipose tissue-derived mesenchymal stem cells (ADSCs) play a crucial role in the field of regenerative medicine and tissue repair for its own unique features. However, up to date, the isolation and characterizations of multidifferentiation potentials of goose ADSCs are still uncertain. In this study, we successfully isolated ADSCs from goose inguinal groove in vitro for the first time and also attempted to unravel its fundamental differentiation potentials and genetic characteristics. The results showed that isolated ADSCs exhibited a typical fibroblast-like morphology and high proliferative potential, could be passaged for at least 40 passages and maintained high hereditary stability with more than 92...
August 13, 2018: DNA and Cell Biology
https://www.readbyqxmd.com/read/30100810/interfacial-waveforms-in-chiral-lattices-with-gyroscopic-spinners
#18
M Garau, G Carta, M J Nieves, I S Jones, N V Movchan, A B Movchan
We demonstrate a new method of achieving topologically protected states in an elastic hexagonal system of trusses by attaching gyroscopic spinners, which bring chirality to the system. Dispersive features of this medium are investigated in detail, and it is shown that one can manipulate the locations of stop-bands and Dirac points by tuning the parameters of the spinners. We show that, in the proximity of such points, uni-directional interfacial waveforms can be created in an inhomogeneous lattice and the direction of such waveforms can be controlled...
July 2018: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/30100333/on-demand-synchronous-audio-video-telemedicine-visits-are-cost-effective
#19
Garrison Nord, Kristin L Rising, Roger A Band, Brendan G Carr, Judd E Hollander
INTRODUCTION: Claims data raises the possibility that on demand telemedicine programs might increase new utilization, offsetting the cost benefits described in some retrospective analyses. We prospectively evaluated the cost of a synchronous audio-video on-demand telemedicine taking into account both what patients would have done instead of the telemedicine visit as well as the care patients received after the visit. MATERIALS AND METHODS: We conducted a prospective observational study of patients who received care from an on-demand telemedicine program...
August 7, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/30099878/ph-regulated-optical-performances-in-organic-inorganic-hybrid-a-dual-mode-sensor-array-for-pattern-recognition-based-biosensing
#20
Qing Yan, Xu-Yin Ding, Zi-Han Chen, Shi-Fan Xue, Xin-Yue Han, Zi-Yang Lin, Miao Yang, Guoyue Shi, Min Zhang
Dual-mode optical assays are becoming more popular and attractive, since they would provide robust detailed information in biochemical analysis. We herein unveil a novel dual-mode optical (i.e. UV-vis absorption and fluorescence) method for multifunctional sensing of phosphate compounds (PCs) (e.g. nucleotides and pyrophosphate) based on pattern recognition, which innovatively employs only one kind of porphyrin/lanthanide-doped upconversion nanoparticles (Ln-UCNPs) hybrid integrated with a facile pH-regulated strategy as the sensor array...
August 13, 2018: Analytical Chemistry
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