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Ju-Hee Park, Young-Woo Kim, Yeon-Seong Jeong, Hee-Jae Suh, Hyang-Sook Chun, Gun-Young Lee, Ho-Soo Lim, Chan Lee
In this study, an improved analytical method for the detection of the colorant Brown FK in foods using high-performance liquid chromatography was developed. The method, which employed an RC-C18 column and diode array detection at 254 nm with sodium acetate solution and methanol as mobile phases, exhibited good linearity (R2 = 1.0), and its limits of detection and quantification were determined to be 0.06 and 0.19 μg/mL, respectively. The precision was found to be 0-1.2% and the accuracy was between 86.5% and 94...
March 17, 2018: Journal of Chromatographic Science
Mingda Zheng, Yingying Wang, Chenge Wang, Wei Wei, Shuang Ma, Xiaohan Sun, Jiang He
A simple and selective colorimetric sensor based on citrate capped silver nanoparticles (Cit-AgNPs) is proposed for the detection of Thiophanate-methyl (TM) with high sensitivity and selectivity. The method based on the color change of Cit-AgNPs from yellow to cherry red with the addition of TM to Cit-AgNPs that caused a red-shift on the surface plasmon resonance (SPR) band from 394nm to 525nm due to the hydrogen-bonding and substitution. The density functional theory (DFT) method was also calculated the interactions between the TM and citrate ions...
March 13, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Suelayne Gonçalves do Nascimento, Cleonice Patrícia Andrade Lima de Carvalho, Ricarlly Soares da Silva, Conceição Maria de Oliveira, Cristine Vieira do Bonfim
OBJECTIVE: To describe occurrences of mortality due to cervical cancer in Recife (PE), in northeastern Brazil. METHOD: This was a time-series ecological study using data from the Mortality Information System (SIM) regarding the total number of deaths due to cervical cancer (C53 ICD10) that occurred between 2000 and 2012. RESULTS: It was observed that the risk of death due to this form of cancer was higher among women over 60 years of age, those of mixed skin color (53...
2018: Revista Brasileira de Enfermagem
José Eduardo Pelizon Pelino, Alan Passero, Airton Abrahao Martin, Christine Ann Charles
The objective of this study was to evaluate the in vitro effects, including surface morphological characteristics and chemical elemental properties, of different mouthwash formulations on enamel and dental restorative materials, simulating up to 6 months of daily use. Human enamel samples, hydroxyapatite, composite resin, and ceramic surfaces were exposed to 3 different mouthwashes according to label directions - Listerine® Cool Mint®, Listerine® Total Care, and Listerine® Whitening - versus control (hydroalcohol solution) to simulate daily use for up to 6 months...
March 15, 2018: Brazilian Oral Research
Folachodé U G Akogou, Heidy M W den Besten, A P Polycarpe Kayodé, Vincenzo Fogliano, Anita R Linnemann
Sorghum (Sorghum bicolor) extract is traditionally used as red biocolorant in West Africa to colour foods, among which wagashi, a soft cheese. This biocolorant is a source of the phytoalexin apigeninidin and phenolic acids, and users claim that it has preservative effects next to its colouring properties. If such a claim can be scientifically substantiated, it adds a valuable functional property to this natural red colorant, thereby increasing its potential applications in the food industry. Hence, the present study evaluated the antimicrobial properties of dye sorghum extracts using challenge tests in broth and wagashi as a model of a popular food application...
2018: PloS One
Nobukazu Shirakawa, Toshio Iwata, Shinjiro Miyake, Takero Otuka, So Koizumi, Toshitugu Kawata
OBJECTIVES: To evaluate the esthetics and frictional force of an orthodontic wire passed through a newly designed tube made of a polyether ether ketone (PEEK) resin. MATERIALS AND METHODS: Two types of standard PEEK tubes were prepared at 0.5 × 0.6ф and 0.8 × 0.9ф, and different archwires were passed through the tubes. Color values were determined according to brightness and hues. Friction was assessed with different bracket-wire combinations, and surface roughness was determined by stereomicroscopy before and after the application of friction...
March 21, 2018: Angle Orthodontist
Mohamed A Farag, Amira R Khattab, Anja Ehrlich, Matthias Kropf, Andreas G Heiss, Ludger A Wessjohann
Lens culinaris and several Lupinus species are two legumes regarded as potential protein resources aside from their richness in phytochemicals. Characterization of their metabolite composition is warranted as a sustainable functional food. This study presents a discriminatory-holistic approach for metabolites profiling in accessions of four lentil cultivars and four lupinus species via gas chromatography-mass spectrometry. A total of 107 metabolites were identified encompassing organic and amino acids, sugars and sterols along with anti-nutrients viz...
March 21, 2018: Journal of Agricultural and Food Chemistry
Simon D Kloß, Wolfgang Schnick
The structural diversity of tetrahedra networks of phosphates can greatly be enhanced by introduction of mixed N/O anion positions. LiPr2 P4 N7 O3 exemplifies the benefits of N/O mixed anion positions as it is the first rare-earth (oxo)nitridophosphate with a single-layered structure and a degree of condensation (atomic ratio of tetrahedra centers (P) to tetrahedra corners (N/O atoms)) of 2/5. The compound was prepared through high-pressure metathesis starting from PrF3 , LiPN2 , Li2 O, and PON using a hydraulic 1000t press and the multianvil technique...
March 21, 2018: Inorganic Chemistry
Jacob Dodd, Kara Hoverson, Leonard C Sperling
No abstract text is available yet for this article.
April 2018: American Journal of Dermatopathology
Jacob Dodd, Kara Hoverson, Leonard C Sperling
No abstract text is available yet for this article.
April 2018: American Journal of Dermatopathology
Seungjin Lee, Jong Hyun Park, Yun Seok Nam, Bo Ram Lee, Baodan Zhao, Daniele Di Nuzzo, Eui Dae Jung, Hansol Jeon, Ju-Young Kim, Hu Young Jeong, Richard H Friend, Myoung Hoon Song
Organic-inorganic hybrid perovskites are emerging as promising emitting materials due to their narrow full-width at half-maximum emissions, color tunability, and high photoluminescence quantum yields (PLQYs). However, the thermal generation of free charges at room temperature results in a low radiative recombination rate and an excitation intensity-dependent PLQY, which is associated with the trap density. Here, we report perovskite films composed of uniform nano-sized single crystals (average diameter = 31...
March 21, 2018: ACS Nano
Forough Ghasemi, M Reza Hormozi-Nezhad, Morteza Mahmoudi
Monitoring the ratio of 40- and 42-residue amyloid β peptides (i.e., Aβ40 and Aβ42) in human plasma is considered one of the hallmarks of detection of the early stage of Alzheimer's disease (AD). Therefore, development of a specific, yet non-antibody-based method for simultaneous detection of Aβ40 and Aβ42 may have considerable clinical applications. Here, we developed a 'nanoparticle-based colorimetric sensor array' utilizing label-free gold and silver nanoparticles for visual detection of Aβ42 and Aβ40...
March 21, 2018: Nanoscale
Masahiro Ikejiri, Haruka Kojima, Yuumi Fugono, Aki Fujisaka, Yoshiko Chihara, Kazuyuki Miyashita
We have developed a novel analog of the GFP chromophore: geo-DAIN. Since geo-DAIN is equipped with an E/Z-photoisomerizable geometrical diarylmethylene moiety instead of benzylidene of the GFP chromophore, different-colored reversible emissions are expected. We synthesized geo-DAIN by a condensation with methyl imidate and N-(diarylmethylene)glycinate. We found the emission from geo-DAIN to be different from that of benzylidene-type analogs; in the powder state, the E- and Z-isomers of geo-DAIN emitted different fluorescence colors...
March 21, 2018: Organic & Biomolecular Chemistry
Lei He, Xiaoxiang Wang, Lian Duan
Light-emitting electrochemical cells (LECs) have emerged as a promising emissive thin-film technology for next-generation solid-state lighting. However, blue LECs show low performances, which has remained a bottleneck for the fabrication of white LECs for lighting applications. Here, we demonstrate a remarkable enhancement of overall device performance for blue LECs by using an electron-injecting/transporting ionic additive, i.e., [Zn(bpy)3](PF6)2 (bpy is 2.2'-bipyridine, PF6- is hexafluorophosphate). It is revealed that adding [Zn(bpy)3](PF6)2 into the active layers of blue LECs accelerates the device response, enhances simultaneously the brightness and efficiency, reduces the efficiency roll-offs, improves significantly the blue-color stability upon the continuous electrical operation and enhances the device operational stability at optimized conditions...
March 21, 2018: ACS Applied Materials & Interfaces
Y F Cagin, Y Seckin, F Firat, E Samdanci
BACKGROUND AND AIM: Herbal treatments are becoming increasingly popular in many countries. Anchusa Boraginaceae (also called Tort plant and beef tongue) is commonly used as a herbal medicine in Elazıg region as diuretic and in the treatment of ulcers, and it is stated that this has no adverse effect. We report a case of acute hepatitis associated with long time use of high doses of Anchusa Boraginaceae. CASE: A 43-year-old male patient is drinking water of Anchusa Boraginaceae that is boiling for 14 days to dissolve the stones in the gallbladder...
October 2017: Acta Gastro-enterologica Belgica
Zheyuan Wang, S Abdollah Mirbozorgi, Maysam Ghovanloo
A rodent behavior analysis system is presented, capable of automated tracking, pose estimation, and recognition of nine behaviors in freely moving animals. The system tracks three key points on the rodent body (nose, center of body, and base of tail) to estimate its pose and head rotation angle in real time. A support vector machine (SVM)-based model, including label optimization steps, is trained to classify on a frame-by-frame basis: resting, walking, bending, grooming, sniffing, rearing supported, rearing unsupported, micro-movements, and "other" behaviors...
March 21, 2018: Medical & Biological Engineering & Computing
Nimrod Dar, Alexander Rubowitz
Purpose: To report a unique case of pseudo-duplication of the optic disc with maculo-schisis. Observations: A 9-year-old girl presented with decreased vision in the left eye. Her measured visual acuity was 20/50. Dilated fundus examination revealed an optic disc-like lesion with a large crater-like depression, pale color and aberrant retinal vasculature arising from its lower region. Optical coherence tomography (OCT) demonstrated maculo-schisis emerging from the optic disc complex and involving the foveal region...
June 2018: American Journal of Ophthalmology Case Reports
Irina Turku, Timo Kärki, Ari Puurtinen
The influence of accelerated weathering, xenon-arc light and freeze-thaw cycling on wood plastic composites extruded from a recycled plastic was studied. The results showed that, in general, weathering had a stronger impact on samples made from plastic waste compared to a sample made from virgin material. After weathering, the mechanical properties, tensile and flexural, were reduced by 2-30%, depending on the plastic source. Wettability of the samples was shown to play a significant role in their stability...
March 2018: Heliyon
Yasuhiro Uwadaira, Yasuyo Sekiyama, Akifumi Ikehata
Evaluating the maturity of peach fruit is desirable during both the preharvest and postharvest periods, and flesh firmness (FF) is a representative maturity index. Although a non-destructive FF measurement technique using visible (VIS) and near-infrared (NIR) spectroscopy has been developed, the principle has been unclear. This study was conducted to examine the structure of the FF prediction model by comparing with that of the model for measuring water-soluble pectin (WSP) content. Those two prediction models have the same information regions related to the colors of pericarp and mesocarp (chlorophyll) and to a water band in the NIR region...
February 2018: Heliyon
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