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https://www.readbyqxmd.com/read/29667998/isolation-purification-characterization-and-bioactivities-of-a-glucan-from-the-root-of-pueraria-lobata
#1
Can Xu, Ningbo Qin, Chunyan Yan, Shumei Wang
The root of Pueraria lobata is considered to be a medicinal and edible herb for the treatment of diabetes, and it has a long history of application in China. To explore the constituents responsible for the anti-hyperglycemic activities of P. lobata, a water-soluble polysaccharide (PL70-1-1) was isolated and purified by using a DEAE-Cellulose 52 anion exchange column and a Sephacryl S-100 gel filtration column. Its molecular weight (2584 Da) was determined by high performance gel permeation chromatography (HPGPC)...
April 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29667898/wernicke-s-encephalopathy-after-cardiac-surgery
#2
Yoshiyuki Nishimura
A 76-year-old woman who had been on hemodialysis for 3 years developed ischemic mitral valve insufficiency, tricuspid insufficiency, and chronic atrial fibrillation, and underwent cardiac surgery. On the 4th postoperative day, she experienced a sudden disturbance of consciousness, aphasia, and limb ataxia. Brain computed tomography and magnetic resonance imaging showed no abnormalities. Wernicke's encephalopathy was suspected and the patient was given vitamin B1, whereupon her symptoms gradually improved. On the 42nd postoperative day, she was free of neurological symptoms and discharged...
January 1, 2018: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/29667881/the-ability-of-adc-measurements-in-the-assessment-of-patients-with-stage-i-endometrial-carcinoma-based-on-three-risk-categories
#3
Shijia Wang, Jia Liu, Feng Yuan, Xiaojun Chen, Fenghua Ma, Guofu Zhang, Xiaomei Tian
Background Better selection of patients with intermediate and high-risk stage I endometrial carcinoma (EC) for lymphadenectomy has an important effect on the prognosis. Purpose To investigate the role of apparent diffusion coefficient (ADC) measurements in the assessment of stage I EC patients based on three risk categories. Material and Methods We retrospectively studied 80 patients with EC and 28 cervical cancer patients with normal endometrium. 1.5-T conventional magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) (b = 0, 1000 s/mm2 ) were performed, and ADC values were calculated...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29667880/motion-artifacts-lesion-type-and-parenchymal-enhancement-in-breast-mri-what-does-really-influence-diagnostic-accuracy
#4
Paola Clauser, Matthias Dietzel, Michael Weber, Clemens G Kaiser, Pascal At Baltzer
Background Motion artifacts can reduce image quality of breast magnetic resonance imaging (MRI). There is a lack of data regarding their effect on diagnostic estimates. Purpose To evaluate factors that potentially influence readers' diagnostic estimates in breast MRI: motion artifacts; amount of fibroglandular tissue; background parenchymal enhancement; lesion size; and lesion type. Material and Methods This Institutional Review Board-approved, retrospective, cross-sectional, single-center study included 320 patients (mean age = 55...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29667852/determination-of-the-position-of-the-knee-at-the-time-of-an-anterior-cruciate-ligament-rupture-for-male-versus-female-patients-by-an-analysis-of-bone-bruises
#5
Kwadwo A Owusu-Akyaw, Sophia Y Kim, Charles E Spritzer, Amber T Collins, Zoë A Englander, Gangadhar M Utturkar, William E Garrett, Louis E DeFrate
BACKGROUND: The incidence of anterior cruciate ligament (ACL) ruptures is 2 to 4 times higher in female athletes as compared with their male counterparts. As a result, a number of recent studies have addressed the hypothesis that female and male patients sustain ACL injuries via different mechanisms. The efficacy of prevention programs may be improved by a better understanding of whether there are differences in the injury mechanism between sexes. Hypothesis/Purpose: To compare knee positions at the time of a noncontact ACL injury between sexes...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29667814/resolving-confined-7-li-dynamics-of-uranyl-peroxide-capsule-u-24
#6
Jing Xie, Harrison A Neal, Jennifer Szymanowski, Peter C Burns, Todd M Alam, May Nyman, Laura Gagliardi
We obtained a kerosene-soluble form of the lithium salt [UO2 (O2 )(OH)2 ]24 phase (Li-U24 ), by adding cetyltrimethylammonium bromide surfactant to aqueous Li-U24 . Interestingly, its variable-temperature solution 7 Li NMR spectroscopy resolves two narrowly spaced resonances down to -10 °C, which shift upfield with increasing temperature, and finally coalesce at temperatures > 85 °C. Comparison with solid-state NMR demonstrates that the Li dynamics in the Li-U24 -CTA phase involves only exchange between different local encapsulated environments...
April 18, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29667672/tuning-ultrafast-electron-injection-dynamics-at-organic-graphene-metal-interfaces
#7
Abhilash Ravikumar, Gregor Kladnik, Moritz Müller, Albano Cossaro, Gregor Bavdek, Laerte L Patera, Daniel Sánchez-Portal, Latha Venkataraman, Alberto Morgante, Gian Paolo Brivio, Dean Cvetko, Guido Fratesi
We compare the ultrafast charge transfer dynamics of molecules on epitaxial graphene and bilayer graphene grown on Ni(111) interfaces through first principles calculations and X-ray resonant photoemission spectroscopy. We use 4,4'-bipyridine as a prototypical molecule for these explorations as the energy level alignment of core-excited molecular orbitals allows ultrafast injection of electrons from a substrate to a molecule on a femtosecond timescale. We show that the ultrafast injection of electrons from the substrate to the molecule is ∼4 times slower on weakly coupled bilayer graphene than on epitaxial graphene...
April 18, 2018: Nanoscale
https://www.readbyqxmd.com/read/29667660/a-new-functional-membrane-protein-microarray-based-on-tethered-phospholipid-bilayers
#8
Meriem Chadli, Ofelia Maniti, Christophe Marquette, Bruno Tillier, Sandra Cortès, Agnès Girard-Egrot
A new prototype of a membrane protein biochip is presented in this article. This biochip was created by the combination of novel technologies of peptide-tethered bilayer lipid membrane (pep-tBLM) formation and solid support micropatterning. Pep-tBLMs integrating a membrane protein were obtained in the form of microarrays on a gold chip. The formation of the microspots was visualized in real-time by surface plasmon resonance imaging (SPRi) and the functionality of a GPCR (CXCR4), reinserted locally into microwells, was assessed by ligand binding studies...
April 18, 2018: Analyst
https://www.readbyqxmd.com/read/29667604/universal-doping-evolution-of-the-superconducting-gap-anisotropy-in-single-crystals-of-electron-doped-ba-fe-sub-1-x-sub-rh-sub-x-sub-sub-2-sub-as-sub-2-sub-from-london-penetration-depth-measurements
#9
Hyunsoo Kim, Makariy A Tanatar, Catalin Martin, Erick C Blomberg, Ni Ni, Sergey L Bud'ko, Paul C Canfield, Ruslan Prozorov
Doping evolution of the superconducting gap anisotropy was studied in single crystals of 4$d$-electron doped Ba(Fe$_{1-x}$Rh$_x$)$_2$As$_2$ using tunnel diode resonator measurements of the temperature variation of London penetration depth $\Delta\lambda(T)$. Single crystals with doping level representative of underdoped regime $x$ = 0.039 ($T_c=$ 15.5 K), close to optimal doping $x=$ 0.057 ($T_c=$ 24.4 K) and overdoped $x=$ 0.079 ($T_c=$ 21.5 K) and $x=$ 0.131($T_c=$ 4.9 K) were studied. Superconducting energy gap anisotropy was characterized by the exponent, $n$, by fitting the data to the power-law, $\Delta\lambda=AT^n$...
April 18, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29667602/localized-surface-plasmon-resonance-modulation-of-totally-encapsulated-vo2-au-vo2-composite-structure
#10
Jiran Liang, Jinbang Guo, Yirui Zhao, Ying Zhang, Tianyu Su
We design and fabricate a totally encapsulated VO2/Au/VO2 composite structure which is aimed to improve the tunability of the localized surface plasmon resonance (LSPR) peak. In this work, the structure will ensure all the Au NPs' resonant electric field area was filled with VO2. The modulation range of the totally encapsulated structure is larger than that of the semi-coated structure. To further improve the modulation range, we also explore the VO2 thickness dependence of the structure's LSPR modulation. With the increase of the top-layer VO2 thin film thickness, the modulation range become larger...
April 18, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29667599/sensitive-singular-phase-optical-detection-without-phase-measurements-with-tamm-plasmons
#11
Svetlana V Boriskina, Yoichiro Tsurimaki
Spectrally-tailored interactions of light with material interfaces offer many exciting applications in sensing, photo-detection, and optical energy conversion. In particular, complete suppression of light reflectance at select frequencies accompanied by sharp phase variations in the reflected signal forms the basis for the development of ultra-sensitive singular-phase optical detection schemes such as Brewster and surface plasmon interferometry. However, both the Brewster effect and surface-plasmon-mediated absorption on planar interfaces are limited to one polarization of the incident light and oblique excitation angles, and may have limited bandwidth dictated by the material dielectric index and plasma frequency...
April 18, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29667503/effects-of-noble-metal-nanoparticles-on-the-hydroxyl-radical-scavenging-ability-of-dietary-antioxidants
#12
Hui Zhang, Xiumei Jiang, Gaojuan Cao, Xiaowei Zhang, Timothy R Croley, Xiaochun Wu, Jun-Jie Yin
Noble metal nanoparticles (NPs) have been widely used in many consumer products. Their effects on the antioxidant activity of commercial dietary supplements have not been well evaluated. In this study, we examined the effects of gold (Au NPs), silver (Ag NPs), platinum (Pt NPs), and palladium (Pd NPs) on the hydroxyl radical (·OH) scavenging ability of three dietary supplements vitamin C (L-ascorbic acid, AA), (-)-epigallocatechin gallate (EGCG), and gallic acid (GA). By electron spin resonance (ESR) spin-trapping measurement, the results show that these noble metal NPs can inhibit the hydroxyl radical scavenging ability of these dietary supplements...
April 3, 2018: Journal of Environmental Science and Health. Part C, Environmental Carcinogenesis & Ecotoxicology Reviews
https://www.readbyqxmd.com/read/29667404/silver-ion-as-a-novel-coreaction-accelerator-for-remarkably-enhanced-electrochemiluminescence-of-ptca-s2o82-system-and-its-application-in-ultrasensitive-assay-of-mercury-ion
#13
Yan-Mei Lei, Rui-Xin Wen, Jia Zhou, Ya-Qin Chai, Ruo Yuan, Ying Zhuo
In this work, with the use of Ag (I) ion as a robust coreaction accelerator toward enhancement of 3,4,9,10-perylenetetracarboxylic acid/peroxydisulfate (PTCA/S2O82-) system, a highly sensitive solid-state electrochemiluminescence (ECL) biosensing platform was successfully designed for mercury ion (Hg2+) detection. Specifically, a long guanine-rich (C-rich) double-stranded DNA (dsDNA) was generated by the target Hg2+-controlled DNA machine, which could embed the Ag (I) ion for ECL signal amplification of PTCA/S2O82- system...
April 18, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29667342/middle-down-characterization-of-the-cell-cycle-dependence-of-histone-h4-post-translational-modifications-and-proteoforms
#14
Tingting Jiang, Michael E Hoover, Matthew V Holt, Michael A Freitas, Alan G Marshall, Nicolas L Young
Post-translational modifications (PTMs) of histones are important epigenetic regulatory mechanisms that are often dysregulated in cancer. We employ middle-down proteomics to investigate the PTMs and proteoforms of histone H4 during cell cycle progression. We use pH gradient weak cation exchange-hydrophilic interaction liquid chromatography (WCX-HILIC) for on-line liquid chromatography-mass spectrometry analysis to separate and analyze the proteoforms of histone H4. This provides enhanced separation of proteoforms, including positional isomers, and simplifies downstream data analysis...
April 17, 2018: Proteomics
https://www.readbyqxmd.com/read/29667282/cardiac-gated-phase-contrast-magnetic-resonance-angiography-is-a-reliable-and-reproducible-technique-for-quantifying-blood-flow-in-canine-major-cranial-abdominal-vessels
#15
Francesca Del Chicca, Andrea Schwarz, Paula Grest, Florian Willmitzer, Matthias Dennler, Patrick R Kircher
Blood flow changes in cranial abdominal vessels are important contributing factors for canine hepatic disease. This prospective, experimental, pilot study aimed to evaluate cardiac-gated, phase contrast magnetic resonance angiography (PCMRA) as a method for characterizing blood flow in canine major cranial abdominal vessels. Eleven, healthy, adult beagle dogs were sampled. Cardiac-gated, phase contrast magnetic resonance angiography of the cranial abdomen was performed in each dog and blood flow was independently measured in each of the major cranial abdominal vessels by three observers, with two observers recording blood flow values once and one observer recording blood flow values three times...
April 17, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29667272/different-brain-networks-underlying-intelligence-in-autism-spectrum-disorders
#16
Emmanuel Peng Kiat Pua, Charles B Malpas, Stephen C Bowden, Marc L Seal
There has been sustained clinical and cognitive neuroscience research interest in how network correlates of brain-behavior relationships might be altered in Autism Spectrum Disorders (ASD) and other neurodevelopmental disorders. As previous work has mostly focused on adults, the nature of whole-brain connectivity networks underlying intelligence in pediatric cohorts with abnormal neurodevelopment requires further investigation. We used network-based statistics (NBS) to examine the association between resting-state functional Magnetic Resonance Imaging (fMRI) connectivity and fluid intelligence ability in male children (n = 50) with Autism Spectrum Disorders (ASD; M = 10...
April 17, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29667260/tai-chi-improves-brain-metabolism-and-muscle-energetics-in-older-adults
#17
Min Zhou, Huijun Liao, Lasya P Sreepada, Joshua R Ladner, James A Balschi, Alexander P Lin
BACKGROUND AND PURPOSE: Tai Chi is a mind-body exercise that has been shown to improve both mental and physical health. As a result, recent literature suggests the use of Tai Chi to treat both physical and psychological disorders. However, the underlying physiological changes have not been characterized. The aim of this pilot study is to assess the changes in brain metabolites and muscle energetics after Tai Chi training in an aging population using a combined brain-muscle magnetic resonance spectroscopy (MRS) examination...
April 17, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29667156/how-we-manage-patients-with-plasmacytomas
#18
REVIEW
Despina Fotiou, Meletios A Dimopoulos, Efstathios Kastritis
PURPOSE OF REVIEW: To discuss the diagnostic approach, treatment options, and future considerations in the management of plasmacytomas, either solitary or in the context of overt multiple myeloma (MM). RECENT FINDINGS: Advanced imaging techniques such as whole-body magnetic resonance imaging and positron emission tomography/computerized tomography are essential for the diagnostic workup of solitary plasmacytomas (SP) to rule out the presence of other disease foci...
April 17, 2018: Current Hematologic Malignancy Reports
https://www.readbyqxmd.com/read/29667148/sublingual-nodules-diagnostic-markers-of-metastatic-breast-cancer
#19
Xue Yang, Cui-Hong Zhu, Rui Cao, Jian Hao, Xiong-Zhi Wu
OBJECTIVE: To evaluate the diagnostic significance of sublingual nodules for metastasis of patients with breast cancer and further to explore the mechanisms of sublingual nodules. METHODS: The image data of 117 in-patients with breast cancer in stage I-IV in Tianjin Medical University Cancer Institute and Hospital from December 2009 to September 2011 were assessed retrospectively. All photos of patients' tongue were recorded by the digital camera of uniform type within 1 month after serological examination and regular re-examined by computed tomography (CT), magnetic resonance imaging and positron emission tomography CT...
April 17, 2018: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29667121/backbone-1-h-13-c-and-15-n-resonance-assignments-of-the-ligand-binding-domain-of-the-human-wildtype-glucocorticoid-receptor-and-the-f602s-mutant-variant
#20
Christian Köhler, Göran Carlström, Stefan Tångefjord, Tineke Papavoine, Matti Lepistö, Karl Edman, Mikael Akke
The glucocorticoid receptor (GR) is a nuclear hormone receptor that regulates key genes controlling development, metabolism, and the immune response. GR agonists are efficacious for treatment of inflammatory, allergic, and immunological disorders. Steroid hormone binding to the ligand-binding domain (LBD) of GR is known to change the structural and dynamical properties of the receptor, which in turn control its interactions with DNA and various co-regulators and drive the pharmacological response. Previous biophysical studies of the GR LBD have required the use of mutant forms to overcome issues with limited protein stability and high aggregation propensity...
April 17, 2018: Biomolecular NMR Assignments
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