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https://www.readbyqxmd.com/read/28197890/relationships-among-diet-physical-activity-and-dual-plane-dual-energy-x-ray-absorptiometry-bone-outcomes-in-pre-pubertalgirls
#1
Jie Ren, Lynn S Brann, Kay S Bruening, Tamara A Scerpella, Jodi N Dowthwaite
: In pre-pubertal girls, nutrient intakes and non-aquatic organized activity were evaluated as factors in vertebral body bone mass, structure, and strength. Activity, vitamin B12, and dietary fiber predicted bone outcomes most consistently. Exercise and vitamin B12 appear beneficial, whereas high fiber intake appears to be adverse for vertebral body development. PURPOSE: Childhood development sets the baseline for adult fracture risk. Most studies evaluate development using postero-anterior (PA) dual-energy X-ray absorptiometry (DXA) areal bone mineral density, bone mineral content, and bone mineral apparent density...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28194987/mass-defect-based-n-n-dimethyl-leucine-labels-for-quantitative-proteomics-and-amine-metabolomics-of-pancreatic-cancer-cells
#2
Ling Hao, Jillian Johnson, Christopher B Lietz, Amanda Buchberger, Dustin Frost, W John Kao, Lingjun Li
Mass spectrometry-based stable isotope labeling has become a key technology for protein and small-molecule analyses. We developed a multiplexed quantification method for simultaneous proteomics and amine metabolomics analyses via nano reversed-phase liquid chromatography-tandem mass spectrometry (nanoRPLC-MS/MS), called mass defect-based N,N-dimethyl leucine (mdDiLeu) labeling. The duplex mdDiLeu reagents were custom-synthesized with a mass difference of 20.5 mDa, arising from the subtle variation in nuclear binding energy between the two DiLeu isotopologues...
January 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28186094/obliquity-paced-climate-change-recorded-in-antarctic-debris-covered-glaciers
#3
Sean L Mackay, David R Marchant
The degree to which debris-covered glaciers record past environmental conditions is debated. Here we describe a novel palaeoclimate archive derived from the surface morphology and internal debris within cold-based debris-covered glaciers in Antarctica. Results show that subtle changes in mass balance impart major changes in the concentration of englacial debris and corresponding surface topography, and that over the past ∼220 ka, at least, the changes are related to obliquity-paced solar radiation, manifest as variations in total summer energy...
February 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28181433/influence-of-surface-adsorption-on-the-oxygen-evolution-reaction-on-iro2-110
#4
Ding-Yuan Kuo, Jason Ken Kawasaki, Jocienne N Nelson, Jan Kloppenburg, Geoffroy Hautier, Kyle M Shen, Darrell G Schlom, Jin Suntivich
A catalyst functions by stabilizing reaction intermediates, usually through surface adsorption. In the oxygen evolution reaction (OER), surface oxygen adsorptions play an indispensable role in the electrocatalysis. The relationship, however, between the adsorption energetics and OER kinetics has not yet been experimentally measured. Herein, we report an experimental relationship between the adsorption of surface oxygen and the kinetics of the OER on IrO2(110) epitaxially grown on a TiO2(110) single crystal...
February 9, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28169450/quantitating-the-effect-of-prosthesis-design-on-femoral-remodeling-using-high-resolution-region-free-densitometric-analysis-dxa-rfa
#5
Mohsen Farzi, Richard M Morris, Jeannette Penny, Lang Yang, Jose M Pozo, Søren Overgaard, Alejandro F Frangi, J Mark Wilkinson
Dual energy X-ray absorptiometry (DXA) is the reference standard method used to study bone mineral density (BMD) after total hip arthroplasty (THA). However, the subtle, spatially-complex changes in bone mass due to strain-adaptive bone remodeling relevant to different prosthesis designs are not readily resolved using conventional DXA analysis. DXA region free analysis (DXA RFA) is a novel computational image analysis technique that provides a high-resolution quantitation of periprosthetic BMD. Here we applied the technique to quantitate the magnitude and areal size of periprosthetic BMD changes using scans acquired during two previous randomized clinical trials (2004 to 2009); one comparing three cemented prosthesis design geometries, and the other comparing a hip resurfacing versus a conventional cementless prosthesis...
February 7, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28165730/kinetic-pathway-of-3-helix-micelle-formation
#6
JooChuan Ang, Benson T Jung, He Dong, Ting Xu
A subtle but highly pertinent factor in the self-assembly of hierarchical nanostructures is the kinetic landscape. Self-assembly of a hierarchical multicomponent system requires the intricate balance of noncovalent interactions on a similar energy scale that can result in several self-assembly processes occurring at different time scales. We seek to understand the hierarchical assemblies within an amphiphilic 3-helix peptide-PEG-lipid conjugate system in the formation process of highly stable 3-helix micelles (3HMs)...
February 15, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28161941/-straining-to-separate-the-rare-earths-how-the-lanthanide-contraction-impacts-chelation-by-diglycolamide-ligands
#7
Ross J Ellis, Derek M Brigham, Laetitia Delmau, Alexander S Ivanov, Neil J Williams, Minh Nguyen Vo, Benjamin Reinhart, Bruce A Moyer, Vyacheslav S Bryantsev
The subtle energetic differences underpinning adjacent lanthanide discrimination are explored with diglycolamide ligands. Our approach converges liquid-liquid extraction experiments with solution-phase X-ray absorption spectroscopy (XAS) and density functional theory (DFT) simulations, spanning the lanthanide series. The homoleptic [(DGA)3Ln](3+) complex was confirmed in the organic extractive solution by XAS, and this was modeled using DFT. An interplay between steric strain and coordination energies apparently gives rise to a nonlinear trend in discriminatory lanthanide ion complexation across the series...
February 6, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28149063/acute-effects-of-mobile-phone-radiations-on-subtle-energy-levels-of-teenagers-using-electrophotonic-imaging-technique-a-randomized-controlled-study
#8
Hemant Bhargav, T M Srinivasan, Suman Bista, A Mooventhan, Vandana Suresh, Alex Hankey, H R Nagendra
BACKGROUND: Mobile phones induce radio frequency electromagnetic field (RF-EMF) which has been found to affect subtle energy levels of adults through Electrophotonic Imaging (EPI) technique in a previous pilot study. MATERIALS AND METHODS: We enrolled 61 healthy right-handed healthy teenagers (22 males and 39 females) in the age range of 17.40 ± 0.24 years from educational institutes in Bengaluru. Subjects were randomly divided into two groups: (1) (mobile phone in ON mode [MPON] at right ear) and (2) mobile phone in OFF mode (MPOF)...
January 2017: International Journal of Yoga
https://www.readbyqxmd.com/read/28124829/interplay-among-electrostatic-dispersion-and-steric-interactions-spectroscopy-and-quantum-chemical-calculations-of-%C3%AF-hydrogen-bonded-complexes
#9
Sumit Kumar, Santosh Kumar Singh, Jamuna Kanaram Vaishnav, J Grant Hill, Aloke Das
π-hydrogen bonding interactions are ubiquitous in both materials and biology. Despite their relatively weak nature great progress has been made in their investigation by experimental and theoretical methods, but this becomes significantly more complicated when secondary intermolecular interactions are present. In this study the effect of successive methyl substitution on the supramolecular structure and interaction energy of indole⋯methylated benzene (ind⋯n-mb, n = 1-6) complexes is probed through a combination of supersonic jet experiment and benchmark quality quantum chemical calculations...
January 26, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28112404/ecosystem-flux-and-biotic-modification-as-drivers-of-metaecosystem-dynamics
#10
Romana Limberger, Julia Birtel, Daniel da Silva Farias, Blake Matthews
The fluxes of energy, matter, and organisms are important structuring forces of metaecosystems. Such ecosystem fluxes likely interact with environmental heterogeneity and differentially affect the diversity of multiple communities. In an aquatic mesocosm experiment, we tested how ecosystem flux and patch heterogeneity affected the diversity of bacteria, phytoplankton, and zooplankton metacommunities, and the structure and functioning of metaecosystems. We built metaecosystems consisting of three mesocosms that were either connected by flux of living organisms, organic material, and nutrients (alive ecosystem flux) or only by flux of organic material and nutrients (dead ecosystem flux)...
January 23, 2017: Ecology
https://www.readbyqxmd.com/read/28111356/a-novel-quantitative-approach-to-the-measurement-of-abdominal-aortic-calcification-as-applied-to-the-canadian-multicenter-osteoporosis-study-camos
#11
Mark Grant, Mandy E Turner, Jeremy Murray-Guenther, Tassos Anastassiades, Wilma M Hopman, Stephen M Adams, Paul Jeronimo, Robert Nolan, Michael A Adams, Rachel M Holden
BACKGROUND AND AIMS: Lateral spine radiographs provide an inexpensive resource for characterizing abdominal aortic calcification (AAC). A widely accepted measurement of AAC is the semi-quantitative technique generated by the Framingham Heart Study (F-AAC-24). We sought to develop an analytical method to quantify ACC (QAAC) on lateral spine radiographs and compare the finding to conventional subjective measurements. METHODS: Severity of AAC was quantified by measuring pixel intensities in the user-defined region of the aorta with internal standardization to the vertebral endplates and background calibration to the density of the vertebral body...
January 19, 2017: Bone
https://www.readbyqxmd.com/read/28109252/rna-tvcurve-a-web-server-for-rna-secondary-structure-comparison-based-on-a-multi-scale-similarity-of-its-triple-vector-curve-representation
#12
Ying Li, Xiaohu Shi, Yanchun Liang, Juan Xie, Yu Zhang, Qin Ma
BACKGROUND: RNAs have been found to carry diverse functionalities in nature. Inferring the similarity between two given RNAs is a fundamental step to understand and interpret their functional relationship. The majority of functional RNAs show conserved secondary structures, rather than sequence conservation. Those algorithms relying on sequence-based features usually have limitations in their prediction performance. Hence, integrating RNA structure features is very critical for RNA analysis...
January 21, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28089707/understanding-infant-eating-behaviour-lessons-learned-from-observation
#13
REVIEW
Marion M Hetherington
Observations of human infants during feeding presents a rich source of data to identify the ways in which hunger, appetite and satiety are communicated in early life. Infants signal appetite through their interest or disinterest in food using a series of communication cues from rapid and transient facial expressions to subtle or potent gestures and bodily movements through to vocalisations and eventually speech. Even in the first days of life facial expressions in response to basic tastes are clearly demonstrated and shared between human infants, other primates and the rat...
January 12, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28071605/eraser-based-eco-friendly-fabrication-of-a-skin-like-large-area-matrix-of-flexible-carbon-nanotube-strain-and-pressure-sensors
#14
Parikshit Sahatiya, Sushmee Badhulika
This paper reports a new type of electronic, recoverable skin-like pressure and strain sensor, produced on a flexible, biodegradable pencil-eraser substrate and fabricated using a solvent-free, low-cost and energy efficient process. Multi-walled carbon nanotube (MWCNT) film, the strain sensing element, was patterned on pencil eraser with a rolling pin and a pre-compaction mechanical press. This induces high interfacial bonding between the MWCNTs and the eraser substrate, which enables the sensor to achieve recoverability under ambient conditions...
January 10, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28063434/integral-steric-asymmetry-in-the-inelastic-scattering-of-no-x-2-%C3%AE
#15
M Brouard, S D S Gordon, A Hackett Boyle, C G Heid, B Nichols, V Walpole, F J Aoiz, S Stolte
The integral steric asymmetry for the inelastic scattering of NO(X) by a variety of collision partners was recorded using a crossed molecular beam apparatus. The initial state of the NO(X, v = 0, j = 1/2, Ω=1/2, ϵ=-1,f) molecule was selected using a hexapole electric field, before the NO bond axis was oriented in a static electric field, allowing probing of the scattering of the collision partner at either the N- or O-end of the molecule. Scattered NO molecules were state selectively probed using (1 + 1') resonantly enhanced multiphoton ionisation, coupled with velocity-map ion imaging...
January 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28051874/effects-of-a-passive-online-software-application-on-heart-rate-variability-and-autonomic-nervous-system-balance
#16
Beverly Rubik
OBJECTIVE: This study investigated whether short-term exposure to a passive online software application of purported subtle energy technology would affect heart rate variability (HRV) and associated autonomic nervous system measures. METHODS: This was a randomized, double-blinded, sham-controlled clinical trial (RCT). The study took place in a nonprofit laboratory in Emeryville, California. Twenty healthy, nonsmoking subjects (16 females), aged 40-75 years, participated...
January 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28049305/intermolecular-dissociation-energies-of-dispersively-bound-1-naphthol%C3%A2-cycloalkane-complexes
#17
Surajit Maity, Philipp Ottiger, Franziska A Balmer, Richard Knochenmuss, Samuel Leutwyler
Intermolecular dissociation energies D0(S0) of the supersonic jet-cooled complexes of 1-naphthol (1NpOH) with cyclopentane, cyclohexane, and cycloheptane were determined to within <0.5% using the stimulated-emission pumping resonant two-photon ionization method. The ground state D0(S0) values are bracketed as 20.23±0.07 kJ/mol for 1NpOH⋅cyclopentane, 20.34±0.04 kJ/mol for 1NpOH⋅cyclohexane, and 22.07±0.10 kJ/mol for two isomers of 1NpOH⋅cycloheptane. Upon S0→S1 excitation of the 1-naphthol chromophore, the dissociation energies of the 1NpOH⋅cycloalkane complexes increase from 0...
December 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28042820/scrms-an-rfid-and-sensor-web-enabled-smart-cultural-relics-management-system
#18
Changjiang Xiao, Nengcheng Chen, Dandan Li, You Lv, Jianya Gong
Cultural relics represent national or even global resources of inestimable value. How to efficiently manage and preserve these cultural relics is a vitally important issue. To achieve this goal, this study proposed, designed, and implemented an RFID and Sensor Web-enabled smart cultural relics management system (SCRMS). In this system, active photovoltaic subtle energy-powered Radio Frequency Identification (RFID) is used for long-range contactless identification and lifecycle management of cultural relics during their storage and circulation...
December 30, 2016: Sensors
https://www.readbyqxmd.com/read/28034318/sensitive-and-precise-characterization-of-combinatorial-histone-modifications-by-selective-derivatization-coupled-with-rplc-ethcd-ms-ms
#19
Rijing Liao, Dan Zheng, Aiying Nie, Shaolian Zhou, Haibing Deng, Yuan Gao, Pengyuan Yang, Yanyan Yu, Lin Tan, Wei Qi, Jiaxi Wu, En Li, Wei Yi
Deciphering the combinatorial histone codes has been a long-standing interest in the epigenetics field, which requires the reliable and robust characterization of the post-translational modifications (PTMs) coexisting on histones. To this end, weak cation exchange hydrophilic interaction liquid chromatography is commonly used in middle-down liquid chromatography-mass spectrometry approaches for online separation of variously modified histone peptides. Here we provide a novel strategy that combines the selective histone peptide derivatization using N-hydroxysuccinimide propionate ester with reversed-phase liquid chromatography (RPLC) for the robust, sensitive, and reliable characterization of combinatorial histone PTMs...
January 11, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28018232/membrane-lipid-microenvironment-modulates-thermodynamic-properties-of-the-na-k-atpase-in-branchial-and-intestinal-epithelia-in-euryhaline-fish-in-vivo
#20
Mario Díaz, Rosa Dópido, Tomás Gómez, Covadonga Rodríguez
We have analyzed the effects of different native membrane lipid composition on the thermodynamic properties of the Na(+)-K(+)-ATPase in different epithelia from the gilthead seabream Sparus aurata. Thermodynamic parameters of activation for the Na(+)-K(+)-ATPase, as well as contents of lipid classes and fatty acids from polar lipids were determined for gill epithelia and enterocytes isolated from pyloric caeca, anterior intestine and posterior intestine. Arrhenius analyses of control animals revealed differences in thermal discontinuity values (Td) and activation energies determined at both sides of Td between intestinal and gill epithelia...
2016: Frontiers in Physiology
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