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https://www.readbyqxmd.com/read/29352141/pressure-effect-on-impurity-local-vibrational-mode-and-phase-transitions-in-n-type-iron-doped-indium-phosphide
#1
Chih-Ming Lin, I-Jui Hsu, Sin-Cheng Lin, Yu-Chun Chuang, Wei-Ting Chen, Yen-Fa Liao, Jenh-Yih Juang
The evolution of iron local vibrational mode (Fe LVM) and phase transitions in n-type iron-doped indium phosphide (InP:Fe) were investigated at ambient temperature. In-situ angle-dispersive X-ray diffraction measurements revealed that InP:Fe starts to transform from zinc-blende (ZB) to rock-salt (RS) structure around 8.2(2) GPa and completes around 16.0(2) GPa. The Raman shift of both transverse and longitudinal optical modes increases monotonically with increasing pressure, while their intensities become indiscernible at 11...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29350198/preparation-of-sub-3-nm-copper-nanoparticles-by-microwave-irradiation-in-the-presence-of-triethylene-tetramin
#2
Po-Hao Tseng, Yen-Zen Wang, Tar-Hwa Hsieh, Ko-Shan Ho, Cheng-Hsien Tsai, Kuan-Ting Chen
The preparation of sub 3 nm copper nanoparticles (CuNPs) in ethylene glycol (EG) using triethylene tetramine (TETA) as chelating and reducing agents via a rapid microwave (MW) irradiation is reported. The sub 3 nm CuNPs after MW irradiation are clearly seen from the electronic micrographs. The firm chelation of Cu2+ by TETA is illustrated by the dark blue color of Cu2+/TETA/EG solution and the redox reaction is confirmed by the appearance of red color of the mixtures. The optimal mole ratio of TETA/Cu 2+ is found to be 2...
January 19, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29345455/3d-printing-of-bisphenol-a-free-polycarbonates
#3
Wei Zhu, Sang-Hyun Pyo, Pengrui Wang, Shangting You, Claire Yu, Jeffrey Alido, Justin Liu, Yew Leong, Shaochen Chen
Polycarbonates are widely used in food packages, drink bottles, and various healthcare products such as dental sealants and tooth coatings. However, bisphenol A (BPA) and phosgene used in the production of commercial polycarbonates poses major concerns to public health safety. Here, we report a green pathway to prepare BPA-free polycarbonates (BFPs) by thermal ring opening polymerization and photopolymerization. Polycarbonates prepared from two cyclic carbonates in different mole ratios demonstrated tunable mechanical stiffness, excellent thermal stability, and high optical transparency...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345430/wearable-wireless-tyrosinase-bandage-and-microneedle-sensors-toward-melanoma-screening
#4
Bianca Ciui, Aida Martin, Rupesh K Mishra, Barbara Brunetti, Tatsuo Nakagawa, Thomas J Dawkins, Mengjia Lyu, Cecilia Cristea, Robert Sandulescu, Joseph Wang
Wearable bendable bandage-based sensor and a minimally invasive microneedle biosensor are described toward rapid screening of skin melanoma. These wearable electrochemical sensors are capable of detecting the presence of the tyrosinase (TYR) enzyme cancer biomarker in the presence of its catechol substrate, immobilized on the transducer surface. In the presence of the surface TYR biomarker, the immobilized catechol is rapidly converted to benzoquinone that is detected amperometrically, with a current signal proportional to the TYR level...
January 18, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29345030/reproductive-status-dependent-kisspeptin-and-rfamide-related-peptide-rfrp-gene-expression-in-female-damaraland-mole-rats
#5
Cornelia Voigt, Nigel C Bennett
Damaraland mole rats (Fukomys damarensis) are cooperatively breeding, subterranean mammals, which exhibit high reproductive skew. Reproduction is monopolized by the dominant female of the group while subordinates are physiologically suppressed to the extent that they are anovulatory. It is thought that in these latter animals normal GnRH secretion from the hypothalamus is disrupted. The RFamide peptides kisspeptin (Kiss1) and RFamid-related peptide-3 (RFRP-3) are considered potent regulators of gonadotropin release...
January 18, 2018: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29341232/histological-features-and-outcome-of-inverted-type-a-melanocytic-nevi
#6
Soheil S Dadras, Jun Lu, Artur Zembowicz, Thomas J Flotte, Martin C Mihm
The presence of enlarged epithelioid/spindled nests located deep in the reticular dermis of a biphasic melanocytic neoplasm can mimic melanoma arising in a preexisting nevus, causing over-interpretation of malignancy. We aimed to define the clinicopathologic significance of epithelioid/spindled nests in melanocytic nevi. Retrospectively using clinical and histologic information, we characterized 121 patients with a single lesion showing epithelioid/spindled melanocytes in the reticular dermis or subcutaneous fat, surrounded by melanophages, sometimes blending in with the adnexa...
January 17, 2018: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/29340416/self-assembly-of-cationic-gemini-surfactants-alkanediyl-bis-dimethyldodecyl-ammonium-bromide-in-cyclohexane-effects-of-spacer-length-on-their-association-into-reverse-lyotropic-liquid-crystalline-or-reverse-vesicles
#7
Shenglu Deng, Jianxi Zhao
Herein, homogeneous solutions of cationic gemini surfactants, alkanediyl-α,ω-bis(dimethyldodecylammonium bromide), referred to as 12-s-12 where s = 2, 4, 6, 8, and 10, in cyclohexane have been prepared with the help of sodium hexanoate (SH) or sodium laurate (SL). These surfactants self-assembled in cyclohexane to form various aggregating structures, which were characterised by small-angle X-ray scattering (SAXS) together with polarised microscopy observations. The results showed that 12-2-12/SH, where the gemini had the shortest spacer among this series, formed an inverse micellar cubic liquid crystalline phase of the Fd3m structure...
January 17, 2018: Soft Matter
https://www.readbyqxmd.com/read/29340215/genome-stability-maintenance-in-naked-mole-rat
#8
I O Petruseva, A N Evdokimov, O I Lavrik
The naked mole-rat (Heterocephalus glaber) is one of the most promising models used to study genome maintenance systems, including the effective repair of damage to DNA. The naked mole-rat is the longest lived rodent species, which is extraordinarily resistant to cancer and has a number of other unique phenotypic traits. For at least 80% of its lifespan, this animal shows no signs of aging or any increased likelihood of death and retains the ability to reproduce. The naked mole-rat draws the heightened attention of researchers who study the molecular basis of lengthy lifespan and cancer resistance...
October 2017: Acta Naturae
https://www.readbyqxmd.com/read/29338067/the-influence-of-delayed-cord-clamping-and-cord-milking-on-inflammatory-cytokines-in-umbilical-vein-and-neonatal-circulation
#9
George Daskalakis, Angeliki Papapanagiotou, Charalambos Siristatidis, Petros Drakakis, Ioanna Mole, Anastasia Barbouni, Athanasios G Papavassiliou, Vasilios Pergialiotis
The purpose of the present study was to compare the levels of tumor necrosis factor a (TNF-a), and interleukins (IL) 1, 6, 8 and 10 in the umbilical cord and neonatal circulation among neonates with early and late cord clamping MATERIAL AND METHODS: A consecutive series of 76 cases that had an uncomplicated pregnancy and an uneventful parturition was evaluated. In 40 cases delayed cord clamping was used and in the remaining 36 cases early cord clamping was practiced. Blood samples were collected from the umbilical vein immediately after cord clamping and at 24 hours from the median cubital or basilic vein of the neonate RESULTS: Significant differences were noted in the hematocrit and hemoglobin levels at 24 hours that favored delayed clamping...
January 16, 2018: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/29337575/optical-signatures-of-impurity-impurity-interactions-in-copper-containing-ii-vi-alloy-nanocrystals
#10
Biswajit Bhattacharyya, Kushagra Gahlot, Ranjani Viswanatha, Anshu Pandey
We study the optical properties of copper containing II-VI alloy quantum dots (CuxZn¬yCd1-x-ySe). Copper mole fractions within the host are varied from 0.001 to 0.35. No impurity phases are observed over this composition range and the formation of secondary phases of copper selenide are observed only at xCu > 0.45. The optical absorption and emission spectra of these materials are observed to be a strong function of xCu, and provide information regarding composition induced impurity-impurity interactions...
January 16, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29336691/the-evaluation-of-cr-curcumin-dna-complexation-by-experimental-and-theoretical-approaches
#11
Farhad Ahmadi, Teymour Vahedpour, Ali Akbar Alizadeh
Chromium(III) chloride mediates DNA-DNA cross-linking. Some chromium complexes promote programmed cell death in specific ligand environment through binding to DNA. One strategy that can be supposed for reduction of Cr3+ binding affinity to DNA is using curcumin as a chelator. In the current study, the [Cr(Curcumin)(EtOH)2](NO3)2 (CCC) was synthesized and characterized by UV/Vis, FT-IR, CHN and spectrophotometric titration techniques. The mole ratio plot revealed a 1:1 complex between Cr3+ and curcumin in solution...
January 16, 2018: Nucleosides, Nucleotides & Nucleic Acids
https://www.readbyqxmd.com/read/29332935/novel-treatment-strategies-for-chronic-kidney-disease-insights-from-the-animal-kingdom
#12
REVIEW
Peter Stenvinkel, Johanna Painer, Makoto Kuro-O, Miguel Lanaspa, Walter Arnold, Thomas Ruf, Paul G Shiels, Richard J Johnson
Many of the >2 million animal species that inhabit Earth have developed survival mechanisms that aid in the prevention of obesity, kidney disease, starvation, dehydration and vascular ageing; however, some animals remain susceptible to these complications. Domestic and captive wild felids, for example, show susceptibility to chronic kidney disease (CKD), potentially linked to the high protein intake of these animals. By contrast, naked mole rats are a model of longevity and are protected from extreme environmental conditions through mechanisms that provide resistance to oxidative stress...
January 15, 2018: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/29331908/electricity-production-and-phosphorous-recovery-as-struvite-from-synthetic-wastewater-using-magnesium-air-fuel-cell-electrocoagulation
#13
Jung Hwan Kim, Byung Min An, Dae Hwan Lim, Joo Yang Park
This research was based on the investigation of a major principle, regarding the effects of NaCl and KH2PO4 concentrations on struvite recovery, with electricity production using magnesium-air fuel cell electrocoagulation, in accordance with the concentration of phosphorous and chloride. The weight ratio of N:P in the synthetic wastewater was in the range of 1.2-21. The concentration of NH4Cl was fixed at 0.277 M (approximately 3888 ppm as NH3-N and 5000 ppm as NH4), while PO4-P was in the range of 0...
January 5, 2018: Water Research
https://www.readbyqxmd.com/read/29331683/appropriate-fossil-calibrations-and-tree-constraints-uphold-the-mesozoic-divergence-of-solenodons-from-other-extant-mammals
#14
Mark S Springer, William J Murphy, Alfred L Roca
The mammalian order Eulipotyphla includes four extant families of insectivorans: Solenodontidae (solenodons); Talpidae (moles); Soricidae (shrews); and Erinaceidae (hedgehogs). Of these, Solenodontidae includes only two extant species, which are endemic to the largest islands of the Greater Antilles: Cuba and Hispaniola. Most molecular studies suggest that eulipotyphlan families diverged from each other across several million years, with the basal split between Solenodontidae and other families occurring in the Late Cretaceous...
January 10, 2018: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29330381/paper-based-inkjet-bioprinting-to-detect-fluorescence-resonance-energy-transfer-for-the-assessment-of-anti-inflammatory-activity
#15
Annie Agnes Suganya Samson, Jungmi Lee, Joon Myong Song
For the first time, a paper-based fluorescence resonance energy transfer (FRET) determination with cyclic AMP (cAMP)-specific phosphodiesterase 4B (PDE4B) inhibitory assay using an inkjet-printing technique is proposed. Non-fabricated parchment paper is found to constitute a unique substrate to measure fluorescent energy transfer, due to its insignificant self-absorption, and enables efficient sample interaction. Here, we report the responsive FRET signals generated on paper, upon sequentially printing reaction components on parchment paper using a conventional inkjet printer equipped with four cartridges...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330175/development-and-validation-of-an-instrument-for-measuring-the-burden-of-medicine-on-functioning-and-well-being-the-medication-related-burden-quality-of-life-mrb-qol-tool
#16
Mohammed A Mohammed, Rebekah J Moles, Sarah N Hilmer, Lisa Kouladjian O'Donnel, Timothy F Chen
OBJECTIVE: Medication-related burden (MRB) is a negative experience with medicine, which may impact on psychological, social, physical and financial well-being of an individual. This study describes the development and initial validation of an instrument specifically designed to measure MRB on functioning and well-being-the Medication-Related Burden Quality of Life (MRB-QoL) tool. METHODS: An initial pool of 76-items for MRB-QoL was generated. The link to MRB-QoL survey was sent to a sample of consumers living with at least one chronic medical condition and taking ≥3 prescription medicines on a regular basis...
January 11, 2018: BMJ Open
https://www.readbyqxmd.com/read/29327028/transition-metals-and-trace-elements-in-the-retinal-pigment-epithelium-and-choroid-correlative-ultrastructural-and-chemical-analysis-by-analytical-electron-microscopy-and-nano-secondary-ion-mass-spectrometry
#17
Antje Biesemeier, Oliver Eibl, Santhana Eswara, Jean-Nicolas Audinot, Tom Wirtz, Ulrich Schraermeyer
Understanding the localisation and abundance of structural elements, trace elements and especially transition metals like Cu and Zn in ocular tissue sections is important for physiology, and also for the characterisation of diseases related to oxidative stress like age-related macular degeneration. Transition metal abundances were investigated in an aged donor eye by nano-secondary ion mass spectrometry (nano-SIMS) elemental mapping using Cs+ and O- primary ions, respectively, and correlated to their respective mole fractions investigated by analytical electron microscopy (AEM)...
January 12, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29325221/naphthalene-derivatives-and-quinones-from-ventilago-denticulata-and-their-nitric-oxide-radical-scavenging-antioxidant-cytotoxic-antibacterial-and-phosphodiesterase-inhibitory-activities
#18
Wannapha Molee, Anuchit Phanumartwiwath, Chatchai Kesornpun, Sanya Sureram, Nattaya Ngamrojanavanich, Kornkanok Ingkaninan, Chulabhorn Mahidol, Somsak Ruchirawat, Prasat Kittakoop
New naphthalene derivatives (1 and 2) and a new isomer (3) of ventilagolin, together with known anthraquinones, chrysophanol (4), physcion or emodin 3-methyl ether (5), and emodin (6), were isolated from vines of Ventilago denticulata. The isolated compounds exhibited cytotoxic activity with IC50 values of 1.15-40.54 μg/mL. Compounds 1-3 selectively exhibited weak antibacterial activity (MIC values of 200.0-400.0 μg/mL), while emodin (6) displayed moderate antibacterial activity with MIC values of 25.0 μg/mL...
January 11, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29323809/case-report-of-an-ectopic-molar-pregnancy-in-the-presence-of-an-intrauterine-device
#19
Deborah A Simon, Angela L Smith, John R Holzhauer
BACKGROUND: Ectopic molar pregnancy is a rare phenomenon and has not been reported in the presence of an intrauterine device (IUD). Clinical diagnosis of molar pregnancy is challenging and requires careful follow-up. CASE: A 25-year-old woman (gravida 2, para 0) with a copper IUD in place presented with a positive pregnancy test. Diagnosis of the complete hydatidiform mole was pathologically confirmed after surgery following clinical and sonographic investigations that identified a left-sided ectopic pregnancy...
November 2017: WMJ: Official Publication of the State Medical Society of Wisconsin
https://www.readbyqxmd.com/read/29322473/pharmaceutical-care-and-health-related-quality-of-life-outcomes-over-the-past-25%C3%A2-years-have-we-measured-dimensions-that-really-matter
#20
REVIEW
Mohammed A Mohammed, Rebekah J Moles, Timothy F Chen
Background Several measures of Health-Related Quality of Life (HRQoL) have been used to evaluate Pharmaceutical Care (PC) interventions in the past decades. However, their suitability for evaluation of PC services has not been comprehensively evaluated. Aim of the review The aim of this review was to perform content analysis of HRQoL measures used in PC studies to gain an insight into their suitability for evaluation of PC services. Method PC studies evaluating HRQoL as a primary or secondary outcomes were retrieved based on a literature search of articles published from 1990 to 2015, on Medline, Embase, International Pharmaceutical Abstracts, Global Health, PsycInfo, Web of Science, Cinahl, HealthStar, Cochrane Library, AUSThealth, Australian Medical Index, and Current content...
January 10, 2018: International Journal of Clinical Pharmacy
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