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https://www.readbyqxmd.com/read/28535351/inherent-simple-cubic-lattice-being-responsible-for-ultrafast-solid-phase-change-of-ge2sb2te5
#1
Wen-Xiong Song, Zhi-Pan Liu, Limin Liu
Crystallization of solid is generally slow in kinetics for atom trapped in solid. Phase-change materials (PCMs) challenge current theory on its ultrafast reversible amorphous-to-crystal transition. Here by using stochastic surface walking global optimization method, we establish the first global potential energy surface (PES) for Ge2Sb2Te5. By analyzing all structures on global PES, we show that an inherent structural pattern of simple cubic lattice is present universally in low energy structures, either globally in a newly found metastable simple cubic crystal phase or locally in the amorphous structures...
May 23, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28532067/development-of-biocompatible-and-safe-polyethersulfone-hemodialysis-membrane-incorporated-with-functionalized-multi-walled-carbon-nanotubes
#2
Muhammad Nidzhom Zainol Abidin, Pei Sean Goh, Ahmad Fauzi Ismail, Mohd Hafiz Dzarfan Othman, Hasrinah Hasbullah, Noresah Said, Siti Hamimah Sheikh Abdul Kadir, Fatmawati Kamal, Mohd Sohaimi Abdullah, Be Cheer Ng
A novel approach in the design of a safe, high performance hemodialysis membrane is of great demand. Despite many advantages, the employment of prodigious nanomaterials in hemodialysis membrane is often restricted by their potential threat to health. Hence, this work focusses on designing a biocompatible polyethersulfone (PES) hemodialysis membrane embedded with poly (citric acid)-grafted-multi walled carbon nanotubes (PCA-g-MWCNTs). Two important elements which could assure the safety of the nanocomposite membrane, i...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28528274/angiopoietin-like-8-angptl8-controls-adipocyte-lipolysis-and-phospholipid-composition
#3
Raghavendra Mysore, Gerhard Liebisch, You Zhou, Vesa M Olkkonen, P A Nidhina Haridas
Angiopoietin-like 8 (Angptl8) inhibits lipolysis in the circulation together with Angplt3 and controls post-prandial fat storage in white adipose tissue (WAT). It is strongly induced by insulin in vivo in WAT and in vitro in adipocytes. In this study we addressed the function of Angptl8 in adipocytes by its stable lentivirus-mediated knock-down in 3T3-L1 cells, followed by analyses of triglyceride (TG) storage, lipid droplet (LD) morphology, the cellular lipidome, lipolysis, and gene expression. Depletion of Angptl8 did not drastically affect the adipocytic differentiation of 3T3-L1 cells but resulted in a moderate (18-19%) reduction of stored TGs...
May 17, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/28517034/comparative-musculoskeletal-anatomy-of-chameleon-limbs-with-implications-for-the-evolution-of-arboreal-locomotion-in-lizards-and-for-teratology
#4
Julia L Molnar, Raul E Diaz, Tautis Skorka, Grant Dagliyan, Rui Diogo
Chameleon species have recently been adopted as models for evo-devo and macroevolutionary processes. However, most anatomical and developmental studies of chameleons focus on the skeleton, and information about their soft tissues is scarce. Here, we provide a detailed morphological description based on contrast enhanced micro-CT scans and dissections of the adult phenotype of all the forelimb and hindlimb muscles of the Veiled Chameleon (Chamaeleo calyptratus) and compare these muscles with those of other chameleons and lizards...
May 18, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28516316/venous-thromboembolism-after-nephrectomy-incidence-timing-and-associated-risk-factors-from-a-national-multi-institutional-database
#5
Brian J Jordan, Richard S Matulewicz, Brian Trihn, Shilajit Kundu
PURPOSE: To evaluate the rate of venous thromboembolism (VTE) after nephrectomy with specific focus on event timing and location (before or after hospital discharge) in order to identify modifiable risk factors and establish benchmarks for preventive interventions. METHODS: Using the ACS-NSQIP database, we identified patients undergoing nephrectomy from 2006 to 2012. Patients were analyzed in two cohorts: collectively and by surgical approach [open vs. lap/robotic (MIS)]...
May 17, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28516115/a-modified-chromogenic-assay-for-determination-of-the-ratio-of-free-intracellular-nad-nadh-in-streptococcus-mutans
#6
Jonathon L Baker, Roberta C Faustoferri, Robert G Quivey
Nicotinamide adenine dinucleotide is a coenzyme present in all kingdoms of life and exists in two forms: oxidized (NAD(+)) and reduced (NADH). NAD(H) is involved in a multitude of essential metabolic redox reactions, providing oxidizing or reducing equivalents. The ratio of free intracellular NAD(+)/NADH is fundamentally important in the maintenance of cellular redox homeostasis (Ying, 2008). Various chromogenic cycling assays have been used to determine the ratio of NAD(+)/NADH in both bacterial and mammalian cells for more than forty years (Bernofsky and Swan, 1973; Nisselbaum and Green, 1969)...
August 20, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28515597/tibial-periosteal-ganglion-cyst-the-ganglion-in-disguise
#7
Anjuna Reghunath, Mahesh K Mittal, Geetika Khanna, V Anil
Soft tissue ganglions are commonly encountered cystic lesions around the wrist presumed to arise from myxomatous degeneration of periarticular connective tissue. Lesions with similar pathology in subchondral location close to joints, and often simulating a geode, is the less common entity called intraosseous ganglion. Rarer still is a lesion produced by mucoid degeneration and cyst formation of the periostium of long bones, rightly called the periosteal ganglion. They are mostly found in the lower extremities at the region of pes anserinus, typically limited to the periosteum and outer cortex without any intramedullary component...
January 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28514510/injury-to-the-infrapatellar-branch-of-the-saphenous-nerve-during-tendon-graft-harvesting-for-knee-ligament-reconstruction-an-ultrasound-simulation-study
#8
Przemysław A Pękala, Ewa Miza, Brandon Michael Henry, Patrick Popieluszko, Marios Loukas, Krzysztof A Tomaszewski
INTRODUCTION: The clinical anatomy of the infrapatellar branch of the saphenous nerve (IPBSN) is of particular importance during operations in the area of the knee, especially when material for anterior cruciate ligament reconstruction is harvested. The nerve can easily be injured during the harvesting procedure, leading to postoperative complications that reduce quality of life. Three different skin incisions are commonly used during hamstring tendon harvesting: horizontal, vertical, and oblique...
May 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28513474/dielectric-analysis-based-on-spherical-shell-model-for-cationic-and-anionic-spherical-polyelectrolyte-brushes
#9
Xiaoxia Guo, Kongshuang Zhao
We report here a dielectric study on cationic and anionic spherical polyelectrolyte brushes (SPBs) (consisting of a polystyrene (PS) core and poly (2-aminoethylmethacrylate hydrochloride (PAEMH) chains or poly (acrylic acid) (PAA) chains grafted onto the core) suspensions over a frequency range of 40 Hz to 110 MHz. The relaxation behavior of the suspensions shows significant changes in the brush layer properties when changing particles mass fraction or pH of system. After eliminating electrode polarization effect at low frequency, two definite relaxations related to the interfacial polarization, around 100 kHz and 10 MHz respectively, are observed...
May 17, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28512689/long-term-results-of-fibular-achilles-tenodesis-westin-s-tenodesis-for-paralytic-pes-calcaneus-is-hypercorrection-avoidable-a-longitudinal-retrospective-study
#10
Helder Henzo Yamada, Patricia Maria Moraes de Barros Fucs
PURPOSE: The purpose of this study was to review all cases of patients submitted to Westin's tenodesis, who had calcaneus feet secondary to myelomeningocele sequel, in order to evaluate the anatomical change provided by surgery and also to verify, in a long-term follow-up, the inversion of the deformity depending on the patient's age. METHODS: In this longitudinal retrospective study, all medical records of patients with myelomeningocele sequelae submitted to Westin's tenodesis from 1993 to 2013 in a public university hospital were reviewed...
May 16, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28509906/therapeutic-efficacy-of-atypical-antipsychotic-drugs-by-targeting-multiple-stress-related-metabolic-pathways
#11
H L Cai, P Jiang, Q Y Tan, R L Dang, M M Tang, Y Xue, Y Deng, B K Zhang, P F Fang, P Xu, D X Xiang, H D Li, J K Yao
Schizophrenia (SZ) is considered to be a multifactorial brain disorder with defects involving many biochemical pathways. Patients with SZ show variable responses to current pharmacological treatments of SZ because of the heterogeneity of this disorder. Stress has a significant role in the pathophysiological pathways and therapeutic responses of SZ. Atypical antipsychotic drugs (AAPDs) can modulate the stress response of the hypothalamic-pituitary-adrenal (HPA) axis and exert therapeutic effects on stress by targeting the prefrontal cortex (PFC) and hippocampus...
May 16, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28509084/whole-exome-sequencing-identifies-a-novel-homozygous-frameshift-mutation-in-the-mtmr2-gene-as-a-causative-mutation-in-a-patient-with-charcot-marie-tooth-disease-type-4b1
#12
Tameemi Abdalla-Moady, Amir Peleg, Orit Sadeh, Khader Badarneh, Fuad Fares
Charcot-Marie-Tooth (CMT) disease refers to a heterogeneous group of axonal and demyelinating polyneuropathies, characterized by chronic motor and sensory dysfunction. CMT is the most common genetic cause of neuropathy. The present study aimed to identify the gene mutation responsible for CMT in Ashkenazi Jew (AJ) patient. Genomic DNA was extracted from whole blood leukocytes of affected family and normal subject. Whole-exome sequencing was performed using the Illumina HiSeq2500. The DNA region containing the identified mutation was amplified by PCR and sequenced using dye-terminator chemistry and the forward primer...
May 16, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28507692/high-level-ab-initio-potential-energy-surface-and-dynamics-of-the-f-ch3i-sn2-and-proton-transfer-reactions
#13
Balázs Olasz, István Szabó, Gábor Czakó
Bimolecular nucleophilic substitution (SN2) and proton transfer are fundamental processes in chemistry and F(-) + CH3I is an important prototype of these reactions. Here we develop the first full-dimensional ab initio analytical potential energy surface (PES) for the F(-) + CH3I system using a permutationally invariant fit of high-level composite energies obtained with the combination of the explicitly-correlated CCSD(T)-F12b method, the aug-cc-pVTZ basis, core electron correlation effects, and a relativistic effective core potential for iodine...
April 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28504534/food-for-happy-thought-glucose-protects-age-related-positivity-effects-under-cognitive-load
#14
Konstantinos Mantantzis, Friederike Schlaghecken, Elizabeth A Maylor
Older adults show a preference for positive information, which disappears under high task demands. We examined whether glucose can help older adults preserve their positivity effect (PE) under high cognitive load. One hundred twenty-two adults (40 young and 42 older in Experiment 1; 40 older in Experiment 2) consumed a glucose (25 g) or a taste-matched placebo drink and completed an immediate recall task of emotional word-lists presented under high- and low-load conditions. Older adults showed PEs for low-load lists...
May 2017: Psychology and Aging
https://www.readbyqxmd.com/read/28504053/improved-antifouling-potential-of-polyether-sulfone-polymeric-membrane-containing-silver-nanoparticles-self-cleaning-membranes
#15
Umair Nazar, Jafar Ali, Qurat Ul Ain Ali, Nasir M Ahmad, Fiza Sarwar, Hassan Waseem, Syed Umair Ullah Jamil
A new strategy to enhance the antifouling potential of polyether sulfone membrane is presented. Chemically synthesized silver nanoparticles (AgNPs) were used to prepare mixed matrix polyether sulfone membrane by phase inversion technique. Primarily, AgNPs synthesis was confirmed by Surface Plasmon Resonance (SPR) at 410-430 nm using UV-vis spectroscopy. XRD analysis revealed AgNPs were crystalline with a diameter of 21 ±2 nm. Furthermore, PES membranes were characterized by Energy Dispersive Spectroscopy (EDS) to confirm the incorporation of AgNPs in membranes...
May 13, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28503802/electrospun-polyethersolfone-nanofibrous-membrane-as-novel-platform-for-protein-immobilization-in-microfluidic-systems
#16
Matin Mahmoudifard, Manouchehr Vossoughi, Sara Soudi, Masoud Soleimani
In the present study, the feasibility of electrospun polyethersolfone (PES) nanofibrous membrane as the solid substrate for microfluidic based immunoassays to enhance the density of immobilized antibody on the surface of membrane was assessed. Conversely, the efficacy of antibody immobilization was compared by two different strategies as 1-Ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC)/N-Hydroxysuccinimide (NHS) coupling chemistry and hydrophobic interaction. Compared to conventional immunoassays carried out in plates or gels, microfluidic based immunoassays grant a lot of advantages such as a consumption of little samples and reagents, shorter analysis time, and higher efficiency...
May 15, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28503539/differences-in-pes-planus-and-pes-cavus-subtalar-eversion-inversion-before-and-after-prolonged-running-using-a-two-dimensional-digital-analysis
#17
Charlotte Sinclair, Ulla Svantesson, Rita Sjöström, Marie Alricsson
In sports, there is a constant discussion about the hyper-pronation and supination of the foot during loading and its relation to injuries or discomfort. The purpose of the present study was to investigate the possible differences in the subtalar joint in the midstance phase of running, between individuals with Pes Planus and Pes Cavus, after 5 min and 45 min of running. Thirty-four subjects, meeting the requirements for Pes Planus (30 feet) and Pes Cavus (35 feet), according to the criteria for Medial Longitudinal Arch-angle, were included in the study...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28502349/total-ankle-replacement-in-the-presence-of-talar-varus-or-valgus-deformities
#18
REVIEW
Andrew Dodd, Timothy R Daniels
Patients presenting with end-stage ankle arthritis with coronal plane talar deformities have a variety of complex multidirectional deformities that require careful preoperative assessment and a clear understanding of the pathophysiology. Surgeons managing these patients with total ankle arthroplasty need to be familiar with extra-articular and intra-articular surgical methods to correct pes planus and pes cavus deformities, including bony procedures and soft tissue procedures. Performing these procedures in 1 or 2 stages depends on surgeon preference and the severity of the deformities...
June 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/28494031/evaluation-of-pink-and-white-esthetic-scores-for-immediately-placed-and-provisionally-restored-implants-in-the-anterior-maxilla
#19
Guaracilei Maciel Vidigal, Mario Groisman, Victor Grover Clavijo, Igor Guimarães Barros Paulinelli Santos, Ricardo Guimarães Fischer
PURPOSE: To evaluate the esthetic result of immediately placed implants with immediate provisional restorations in the anterior maxilla using the pink esthetic score (PES) and white esthetic score (WES). MATERIALS AND METHODS: The records of patients were evaluated retrospectively. The evaluation was carried out by two examiners using 12 evaluation criteria. RESULTS: The average PES value from the evaluation of 53 images obtained from the 53 selected patients (22 men and 31 women) was 8...
May 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28491495/dorsolateral-prefrontal-cortex-contributes-to-the-impaired-behavioral-adaptation-in-alcohol-dependence
#20
Sinem Balta Beylergil, Anne Beck, Lorenz Deserno, Robert C Lorenz, Michael A Rapp, Florian Schlagenhauf, Andreas Heinz, Klaus Obermayer
Substance-dependent individuals often lack the ability to adjust decisions flexibly in response to the changes in reward contingencies. Prediction errors (PEs) are thought to mediate flexible decision-making by updating the reward values associated with available actions. In this study, we explored whether the neurobiological correlates of PEs are altered in alcohol dependence. Behavioral, and functional magnetic resonance imaging (fMRI) data were simultaneously acquired from 34 abstinent alcohol-dependent patients (ADP) and 26 healthy controls (HC) during a probabilistic reward-guided decision-making task with dynamically changing reinforcement contingencies...
2017: NeuroImage: Clinical
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