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https://www.readbyqxmd.com/read/28087056/extraction-chromatographic-separations-of-tantalum-and-tungsten-from-hafnium-and-complex-matrix-constituents
#1
Mathew S Snow, Martha R Finck, Kevin P Carney, Samuel S Morrison
Tantalum (Ta), hafnium (Hf), and tungsten (W) analyses from complex matrices require high purification of these analytes from each other and major/trace matrix constituents, however, current state-of-the-art Ta/Hf/W separations rely on traditional anion exchange approaches that show relatively similar distribution coefficient (Kd) values for each element. This work reports an assessment of three commercially available extraction chromatographic resins (TEVA, TRU, and UTEVA) for Ta/Hf/W separations. Batch contact studies show differences in Ta/Hf and Ta/W Kd values of up to 10(6) and 10(4) (respectively), representing an improvement of a factor of 100 and 300 in Ta/Hf and Ta/W Kd values (respectively) over AG1×4 resin...
January 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28086939/feasibility-study-for-the-non-invasive-blood-pressure-estimation-based-on-ppg-morphology-normotensive-subject-study
#2
Hangsik Shin, Se Dong Min
BACKGROUND: Blood pressure is a critical bio-signal and its importance has been increased with the aged society and the growth of cardiovascular disease population. However, most of hypertensive patients have been suffered the inconvenience in monitoring blood pressure in daily life because the measurement of the blood pressure depends on the cuff-based technique. Nowadays there are many trials to measure blood pressure without cuff, especially, photoplethysmography (PPG) based research is carried out in various ways...
January 10, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28081272/individual-plasticity-of-the-shade-response-of-the-invasive-solidago-canadensis-in-china
#3
Leshan Du, Haiyan Liu, Ming Yan, Junmin Li, Junsheng Li
To evaluate the population variation, individual plasticity, and local adaptability of Solidago canadensis in response to shade treatment, we conducted a common pots experiment with a total of 150 ramets (5 genets, 15 populations, and 2 treatments) subjected to both control (natural light) and shady treatment (10% of natural light). Shade treatment significantly reduced growth and content of defense metabolites in S. canadensis. Compared to control, shading led to increased height, decreased basal diameter, increased leaf width, increased leaf length, increased chlorophyll content, stronger photosynthetic rate (Pn), stronger stomatal conductance (gs), and lower root to shoot ratio...
2017: PloS One
https://www.readbyqxmd.com/read/28080998/determination-of-oxycodone-and-its-major-metabolites-noroxycodone-and-oxymorphone-by-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-in-plasma-and-urine-application-to-real-cases
#4
Flaminia Pantano, Stefano Brauneis, Alexandre Forneris, Roberta Pacifici, Enrico Marinelli, Chrystalla Kyriakou, Simona Pichini, Francesco Paolo Busardò
BACKGROUND: Oxycodone is a narcotic drug widely used to alleviate moderate and severe acute and chronic pain. Variability in analgesic efficacy could be explained by inter-subject variations in plasma concentrations of parent drug and its active metabolite, oxymorphone. To evaluate patient compliance and to set up therapeutic drug monitoring (TDM), an ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) assay was developed and validated for the parent drug and its major metabolites noroxycodone and oxymorphone...
January 12, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28080049/modeling-diversity-in-structures-of-bacterial-outer-membrane-lipids
#5
Huilin Ma, Daniel D Cummins, Natalie Brooke Edelstein, Jerry Gomez, Aliza Khan, Masud Dikita Llewellyn, Tara Picudella, Sarah Rose Willsey, Shikha Nangia
Lipopolysaccharides are vital components of the outer membrane of gram-negative bacteria, and they act as extremely strong stimulators of innate immunity in diverse eukaryotic species. The primary immunostimulatory center of the LPS molecule is lipid A-a disaccharide-bound lipophilic domain. Considering the broad diversity in bacterial species, there are variations in the lipid A structure and their immunogenic potency. In this work, we model the lipid A structures of eight commensal or human pathogenic bacterial species: Helicobacter pylori, Porphyromonas gingivalis, Bacteroides fragilis, Bordetella pertussis, Chlamydia trachomatis, Campylobacter jejuni, Neisseria meningitidis, and Salmonella minnesota...
January 12, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28079632/interrater-and-test-retest-reliability-and-minimal-detectable-change-of-the-balance-evaluation-systems-test-bestest-and-subsystems-with-community-dwelling-older-adults
#6
Elizabeth Wang-Hsu, Susan S Smith
BACKGROUND AND PURPOSE: Falls are a common cause of injuries and hospital admissions in older adults. Balance limitation is a potentially modifiable factor contributing to falls. The Balance Evaluation Systems Test (BESTest), a clinical balance measure, categorizes balance into 6 underlying subsystems. Each of the subsystems is scored individually and summed to obtain a total score. The reliability of the BESTest and its individual subsystems has been reported in patients with various neurological disorders and cancer survivors...
January 10, 2017: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/28078413/establishment-of-a-sandwich-enzyme-linked-immunosorbent-assay-for-specific-detection-of-bacillus-thuringiensis-bt-cry1ab-toxin-utilizing-a-monoclonal-antibody-produced-with-a-novel-hapten-designed-with-molecular-model
#7
Sa Dong, Xiao Zhang, Yuan Liu, Cunzheng Zhang, Yajing Xie, Jianfeng Zhong, Chongxin Xu, Xianjin Liu
Cry1Ab toxin is commonly expressed in genetically modified crops in order to control chewing pests. At present, the detection method with enzyme-linked immunosorbent assay (ELISA) based on monoclonal antibody cannot specifically detect Cry1Ab toxin for Cry1Ab's amino acid sequence and spatial structure are highly similar to Cry1Ac toxin. In this study, based on molecular design, a novel hapten polypeptide was synthesized and conjugated to keyhole limpet hemocyanin (KLH). Then, through animal immunization with this antigen, a monoclonal antibody named 2C12, showing high affinity to Cry1Ab and having no cross reaction with Cry1Ac, was produced...
January 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28078392/carbon-footprint-assessment-of-western-australian-groundwater-recycling-scheme
#8
Andrew Simms, Stacey Hamilton, Wahidul K Biswas
This research has determined the carbon footprint or the carbon dioxide equivalent (CO2 eq) of potable water production from a groundwater recycling scheme, consisting of the Beenyup wastewater treatment plant, the Beenyup groundwater replenishment trial plant and the Wanneroo groundwater treatment plant in Western Australia, using a life cycle assessment approach. It was found that the scheme produces 1300 tonnes of CO2 eq per gigalitre (GL) of water produced, which is 933 tonnes of CO2 eq higher than the desalination plant at Binningup in Western Australia powered by 100% renewable energy generated electricity...
January 11, 2017: Environmental Management
https://www.readbyqxmd.com/read/28078345/comparison-between-the-optical-properties-of-aerosols-in-the-fine-and-coarse-fractions-over-valladolid-spain
#9
S Mogo, J F López, V E Cachorro, A de Frutos, R Zocca, A Barroso, D Mateos, E Conceição
Continuous measurements of the optical properties of aerosol particles have been made at Valladolid, Spain, covering the period from June 2011 to July 2012. The measurements were made at two size cuts: sub-10 μm and sub-1 μm (PM10 and PM1). The data measured were the scattering and backscattering coefficients, σs and σbs, obtained from an integrating nephelometer, and the absorption coefficient, σa, obtained from a particle soot absorption photometer. Spectrally resolved data were obtained from both instruments at 3 wavelengths (blue/green/red) at low relative humidity (RH < 40%)...
January 12, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28077603/influence-of-focus-of-attention-reinvestment-and-fall-history-on-elderly-gait-stability
#10
Jonathan L A de Melker Worms, John F Stins, Erwin E H van Wegen, Ian D Loram, Peter J Beek
Falls represent a substantial risk in the elderly. Previous studies have found that a focus on the outcome or effect of the movement (external focus of attention) leads to improved balance performance, whereas a focus on the movement execution itself (internal focus of attention) impairs balance performance in elderly. A shift toward more conscious, explicit forms of motor control occurs when existing declarative knowledge is recruited in motor control, a phenomenon called reinvestment. We investigated the effects of attentional focus and reinvestment on gait stability in elderly fallers and nonfallers...
January 2017: Physiological Reports
https://www.readbyqxmd.com/read/28076407/medicinal-plant-diversity-and-inter-cultural-interactions-between-indigenous-guarani-criollos-and-polish-migrants-in-the-subtropics-of-argentina
#11
Monika Kujawska, Norma I Hilgert, Héctor A Keller, Guillermo Gil
Numerous studies highlight the importance of phytotherapy for indigenous and non-indigenous people in different parts of the world. In this work we analyze the richness (number of species), diversity (plant identity and the number of illnesses for which it is used) and similarity of plant species and illnesses treated with them, in order to contribute new data and insight into the importance of plant medicines to the local medical systems of people living in Misiones province, in the subtropics of Argentina...
2017: PloS One
https://www.readbyqxmd.com/read/28076308/measurements-of-serum-non-ceruloplasmin-copper-by-a-direct-fluorescent-method-specific-to-cu-ii
#12
Rosanna Squitti, Mariacristina Siotto, Emanuele Cassetta, Imane Ghafir El Idrissi, Nicola A Colabufo
BACKGROUND: Meta-analyses indicated the breakdown of copper homeostasis in the sporadic form of Alzheimer's disease (AD), comprising copper decreases within the brain and copper increases in the blood and the pool not bound to ceruloplasmin (non-Cp Cu, also known in the literature as "free" copper). The calculated non-Cp Cu (Walshe's) index has many limitations. METHODS: A direct fluorescent method for non-Cp Cu detection has been developed and data are presented herein...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28075369/validation-of-a-dish-based-semiquantitative-food-questionnaire-in-rural-bangladesh
#13
Pi-I D Lin, Sabri Bromage, Md Golam Mostofa, Joseph Allen, Emily Oken, Molly L Kile, David C Christiani
A locally validated tool was needed to evaluate long-term dietary intake in rural Bangladesh. We assessed the validity of a 42-item dish-based semi-quantitative food frequency questionnaire (FFQ) using two 3-day food diaries (FDs). We selected a random subset of 47 families (190 participants) from a longitudinal arsenic biomonitoring study in Bangladesh to administer the FFQ. Two 3-day FDs were completed by the female head of the households and we used an adult male equivalent method to estimate the FD for the other participants...
January 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28071718/reproducibility-and-repeatability-of-computer-tomography-based-measurement-of-abdominal-subcutaneous-and-visceral-adipose-tissues
#14
Yuan-Hao Lee, Hsing-Fen Hsiao, Hou-Ting Yang, Shih-Yi Huang, Wing P Chan
Excessive accumulation of abdominal adipose tissue is a widely recognized as a major feature of obesity, and it can be quantified by dual-energy x-ray absorptiometry (DXA). However, in a phantom study, the inter- and intra-instrument reliability of DXA remains unpredictable. Thus, we attempted to determine the precision of estimates from computer tomography-based measurements and analysis with AZE Virtual Place software. To determine the inter-rater reproducibility and intra-rater repeatability of adipose tissue area estimates, we used the automatic boundary-tracing function of the AZE Virtual Place to generate cross-sectional areas of subcutaneous and visceral adipose tissues from the abdomen of reconstructed CT images...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28071647/colossal-negative-thermal-expansion-in-reduced-layered-ruthenate
#15
Koshi Takenaka, Yoshihiko Okamoto, Tsubasa Shinoda, Naoyuki Katayama, Yuki Sakai
Large negative thermal expansion (NTE) has been discovered during the last decade in materials of various kinds, particularly materials associated with a magnetic, ferroelectric or charge-transfer phase transition. Such NTE materials have attracted considerable attention for use as thermal-expansion compensators. Here, we report the discovery of giant NTE for reduced layered ruthenate. The total volume change related to NTE reaches 6.7% in dilatometry, a value twice as large as the largest volume change reported to date...
January 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28070533/quantification-of-pla-or-3-a-platanus-orientalis-allergen-grown-under-different-environmental-conditions-by-sandwich-elisa
#16
Sedghy Farnaz, Sankian Mojtaba, Moghadam Maliheh, Varasteh Abdol-Reza
BACKGROUND: Platanus species are widely cultured around the world and considered an important cause of allergic reactions. In the present study, we developed a sandwich ELISA to quantify Pla or 3 allergen in P. orientalis pollen extracts grown near high-traffic roads and compared it to pollen extracts collected from rural areas as control. METHODS: Pollen samples were collected from three polluted and two unpolluted sites in Mashhad, northeast Iran. Recombinant Pla or 3 was expressed and used for polyclonal antibody production in rabbit...
October 2016: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28068864/reliability-and-sources-of-variation-of-the-abilhand-kids-questionnaire-in-children-with-cerebral-palsy
#17
Lex D de Jong, Annemiek van Meeteren, Cornelis H Emmelot, Nanne E Land, Pieter U Dijkstra
PURPOSE: To determine reliability of the ABILHAND-Kids, explore sources of variation associated with these measurement results, and generate repeatability coefficients. METHOD: A reliability study with a repeated measures design was performed in an ambulatory rehabilitation care department from a rehabilitation center, and a center for special education. A physician, an occupational therapist, and parents of 27 children with spastic cerebral palsy independently rated the children's manual capacity when performing 21 standardized tasks of the ABILHAND-Kids from video recordings twice with a three week time interval (27 first-, and 25 second video recordings available)...
January 9, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28068607/micro-electromechanical-film-bulk-acoustic-sensor-for-plasma-and-whole-blood-coagulation-monitoring
#18
Da Chen, Shuren Song, Jilong Ma, Zhen Zhang, Peng Wang, Weihui Liu, Qiuquan Guo
Monitoring blood coagulation is an important issue in the surgeries and the treatment of cardiovascular diseases. In this work, we reported a novel strategy for the blood coagulation monitoring based on a micro-electromechanical film bulk acoustic resonator. The resonator was excited by a lateral electric field and operated under the shear mode with a frequency of 1.9GHz. According to the apparent step-ladder curves of the frequency response to the change of blood viscoelasticity, the coagulation time (prothrombin time) and the coagulation kinetics were measured with the sample consumption of only 1μl...
December 30, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28067854/quantitative-assessment-of-first-annular-pulley-and-adjacent-tissues-using-high-frequency-ultrasound
#19
Yi-Hsun Lin, Tai-Hua Yang, Shyh-Hau Wang, Fong-Chin Su
Due to a lack of appropriate image resolution, most ultrasound scanners are unable to sensitively discern the pulley tissues. To extensively investigate the properties of the A1 pulley system and the surrounding tissues for assessing trigger finger, a 30 MHz ultrasound system was implemented to perform in vitro experiments using the hypodermis, A1 pulley, and superficial digital flexor tendon (SDFT) dissected from cadavers. Ultrasound signals were acquired from both the transverse and sagittal planes of each tissue sample...
January 7, 2017: Sensors
https://www.readbyqxmd.com/read/28067283/theoretical-insight-into-oh-and-cl-initiated-oxidation-of-cf3och-cf3-2-and-cf3ocf2cf2h-fate-of-cf3oc-x%C3%A2-cf3-2-and-cf3ocf2cf2x%C3%A2-radicals-x-o-o2
#20
Feng-Yang Bai, Yuan Ma, Shuang Lv, Xiu-Mei Pan, Xiu-Juan Jia
In this study, the mechanistic and kinetic analysis for reactions of CF3OCH(CF3)2 and CF3OCF2CF2H with OH radicals and Cl atoms have been performed at the CCSD(T)//B3LYP/6-311++G(d,p) level. Kinetic isotope effects for reactions CF3OCH(CF3)2/CF3OCD(CF3)2 and CF3OCF2CF2H/CF3OCF2CF2D with OH and Cl were estimated so as to provide the theoretical estimation for future laboratory investigation. All rate constants, computed by canonical variational transition state theory (CVT) with the small-curvature tunneling correction (SCT), are in reasonable agreement with the limited experimental data...
January 9, 2017: Scientific Reports
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