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https://www.readbyqxmd.com/read/27917576/karyotype-diversity-and-genome-size-variation-in-neotropical-maxillariinae-orchids
#1
A P Moraes, S Koehler, J S Cabral, S S L Gomes, L F Viccini, F Barros, L P Felix, M Guerra, E R Forni-Martins
(1) Orchidaceae is a widely distributed plant family with a very diverse vegetative and floral morphology and such variability is also reflected in their karyotypes. However, since only a low proportion of Orchidaceae has been analysed for chromosome data, a greater diversity may await to be unveiled. Here we analyse both genome size (GS) and karyotype in two subtribes recently included in the broadened Maxillariineae to detect how much chromosome and GS variation there are in these groups and to evaluate which genome rearrangements were involved in the species evolution...
December 5, 2016: Plant Biology
https://www.readbyqxmd.com/read/27916009/insertion-of-a-tracheoesophageal-speech-valve-a-novel-approach-in-a-difficult-situation
#2
C P Yiannakis, R B Townsley, I G Smillie, G L Picozzi
BACKGROUND: Functional voice rehabilitation is becoming increasingly important following total laryngectomy and pharyngolaryngectomy. Tracheoesophageal voice via a shunt valve is currently regarded as the 'gold standard' for voice rehabilitation. Traditional techniques usually allow for the replacement of valves in the out-patient setting; however, patient factors such as altered anatomy may occasionally prevent this. OBJECTIVE: This paper describes a novel approach for speech valve insertion that is safe, quick and cost-effective, and which uses equipment commonly available in ENT wards and the operating theatre...
December 5, 2016: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/27912967/qualitative-analysis-of-copaifera-oleoresin-using-comprehensive-two-dimensional-gas-chromatography-and-gas-chromatography-with-classical-and-cold-electron-ionisation-mass-spectrometry
#3
Yong Foo Wong, Thais M Uekane, Claudia M Rezende, Humberto R Bizzo, Philip J Marriott
Improved separation of both sesquiterpenes and diterpenic acids in Copaifera multijuga Hayne oleoresin, is demonstrated by using comprehensive two-dimensional gas chromatography (GC×GC) coupled to accurate mass time-of-flight mass spectrometry (accTOFMS). GC×GC separation employs polar phases (including ionic liquid phases) as the first dimension ((1)D) column, combined with a lower polarity (2)D phase. Elution temperatures (Te) of diterpenic acids (in methyl ester form, DAME) increased as the (1)D McReynolds' polarity value of the column phase decreased...
November 22, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27910691/compact-ecei-system-with-in-vessel-reflective-optics-for-west
#4
Y B Nam, H K Park, W Lee, G S Yun, M Kim, R Sabot, D Elbeze, P Lotte, J Shen
An electron cyclotron emission imaging (ECEI) diagnostic system for WEST (W Environment for Steady state Tokamak) is under development to study the MHD instabilities affected by tungsten impurities. The system will provide 2-D Te fluctuation images (width × height = ∼18 cm × ∼ 34 cm at low field side and ∼13 cm × ∼ 39 cm at high field side) from a poloidal cross section with high spatial (≤1.7 cm) and temporal (≤2 μs) resolutions. While the key concept and electronic structure are similar to that of prior ECEI systems on other tokamak devices such as KSTAR, DIII-D, or ASDEX-U, part of the imaging optics have to be placed inside the vacuum vessel in order to resolve issues on limited installation space and longer beam path to the detector position...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910663/multi-energy-sxr-cameras-for-magnetically-confined-fusion-plasmas-invited
#5
L F Delgado-Aparicio, J Maddox, N Pablant, K Hill, M Bitter, J E Rice, R Granetz, A Hubbard, J Irby, M Greenwald, E Marmar, K Tritz, D Stutman, B Stratton, P Efthimion
A compact multi-energy soft x-ray camera has been developed for time, energy and space-resolved measurements of the soft-x-ray emissivity in magnetically confined fusion plasmas. Multi-energy soft x-ray imaging provides a unique opportunity for measuring, simultaneously, a variety of important plasma properties (Te, nZ, ΔZeff, and ne,fast). The electron temperature can be obtained by modeling the slope of the continuum radiation from ratios of the available brightness and inverted radial emissivity profiles over multiple energy ranges...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910581/spectral-survey-of-helium-lines-in-a-linear-plasma-device-for-use-in-helios-imaging
#6
H B Ray, T M Biewer, D T Fehling, R C Isler, E A Unterberg
Fast visible cameras and a filterscope are used to examine the visible light emission from Oak Ridge National Laboratory's Proto-MPEX. The filterscope has been configured to perform helium line ratio measurements using emission lines at 667.9, 728.1, and 706.5 nm. The measured lines should be mathematically inverted and the ratios compared to a collisional radiative model (CRM) to determine Te and ne. Increasing the number of measurement chords through the plasma improves the inversion calculation and subsequent Te and ne localization...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910508/a-particle-x-ray-temporal-diagnostic-pxtd-for-studies-of-kinetic-multi-ion-effects-and-ion-electron-equilibration-rates-in-inertial-confinement-fusion-plasmas-at-omega-invited
#7
H Sio, J A Frenje, J Katz, C Stoeckl, D Weiner, M Bedzyk, V Glebov, C Sorce, M Gatu Johnson, H G Rinderknecht, A B Zylstra, T C Sangster, S P Regan, T Kwan, A Le, A N Simakov, W T Taitano, L Chacòn, B Keenan, R Shah, G Sutcliffe, R D Petrasso
A Particle X-ray Temporal Diagnostic (PXTD) has been implemented on OMEGA for simultaneous time-resolved measurements of several nuclear products as well as the x-ray continuum produced in High Energy Density Plasmas and Inertial Confinement Fusion implosions. The PXTD removes systematic timing uncertainties typically introduced by using multiple instruments, and it has been used to measure DD, DT, D(3)He, and T(3)He reaction histories and the emission history of the x-ray core continuum with relative timing uncertainties within ±10-20 ps...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910507/the-progress-in-development-of-edge-tangential-thomson-scattering-system-on-hl-2a-tokamak
#8
C H Liu, Y Huang, Y Q Wang, Z Feng, Z P Hou, B Z Fu
The edge tangential Thomson scattering system (ETTSS) was developed for the first time on a HL-2A tokamak. A Nd:YAG laser with a 1064 nm wavelength, 4 J energy, and 30 Hz repetition rate is employed on the ETTSS. The laser beam injects the plasma in the tangential direction on the mid-plane of the machine, and the angles between the laser injection direction and the scattered light collection direction are in the range from 157.5° to 162.8°. The scattered light collection optics with 0.21-0.47 magnification is utilized to collect the scattered light of measurement range from R = 1900 mm to 2100 mm (the normalized radius is from r/a = 0...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910482/upgraded-divertor-thomson-scattering-system-on-diii-d
#9
F Glass, T N Carlstrom, D Du, A G McLean, D A Taussig, R L Boivin
A design to extend the unique divertor Thomson scattering system on DIII-D to allow measurements of electron temperature and density in high triangularity plasmas is presented. Access to this region is selectable on a shot-by-shot basis by redirecting the laser beam of the existing divertor Thomson system inboard - beneath the lower floor using a moveable, high-damage threshold, in-vacuum mirror - and then redirecting again vertically. The currently measured divertor region remains available with this mirror retracted...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910392/real-time-radiative-divertor-feedback-control-development-for-the-nstx-u-tokamak-using-a-vacuum-ultraviolet-spectrometer
#10
V A Soukhanovskii, R Kaita, B Stratton
A radiative divertor technique is planned for the NSTX-U tokamak to prevent excessive erosion and thermal damage of divertor plasma-facing components in H-mode plasma discharges with auxiliary heating up to 12 MW. In the radiative (partially detached) divertor, extrinsically seeded deuterium or impurity gases are used to increase plasma volumetric power and momentum losses. A real-time feedback control of the gas seeding rate is planned for discharges of up to 5 s duration. The outer divertor leg plasma electron temperature Te estimated spectroscopically in real time will be used as a control parameter...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910362/a-novel-cost-effective-multi-point-thomson-scattering-system-on-the-pegasus-toroidal-experiment-invited
#11
D J Schlossberg, G M Bodner, M W Bongard, R J Fonck, J A Reusch, C Rodriguez Sanchez
A novel, cost-effective, multi-point Thomson scattering system has been designed, implemented, and operated on the Pegasus Toroidal Experiment. Leveraging advances in Nd:YAG lasers, high-efficiency volume phase holographic transmission gratings, and increased quantum-efficiency Generation 3 image-intensified charge coupled device (ICCD) cameras, the system provides Thomson spectra at eight spatial locations for a single grating/camera pair. The on-board digitization of the ICCD camera enables easy modular expansion, evidenced by recent extension from 4 to 12 plasma/background spatial location pairs...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910339/atomic-physics-modeling-of-transmission-spectra-of-sc-doped-aerogel-foams-to-support-omega-experiments
#12
H M Johns, N E Lanier, J L Kline, C J Fontes, T S Perry, C L Fryer, C R D Brown, J W Morton, J D Hager, M E Sherrill
We present synthetic transmission spectra generated with PrismSPECT utilizing both the ATBASE model and the Los Alamos opacity library (OPLIB) to evaluate whether an alternative choice in atomic data will impact modeling of experimental data from radiation transport experiments using Sc-doped aerogel foams (ScSi6O12 at 75 mg/cm(3) density). We have determined that in the 50-200 eV Te range there is a significant difference in the 1s-3p spectra, especially below 100 eV, and for Te = 200 eV above 5000 eV in photon energy...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910316/measurement-of-the-deuterium-balmer-series-line-emission-on-east
#13
C R Wu, J Huang, W Gao, W Gao, Z Xu, J F Chang, Y M Hou, Z Jin, J C Xu, Y M Duan, P F Zhang, Y J Chen, L Zhang, Z W Wu, J G Li
Volume recombination plays an important role towards plasma detachment for magnetically confined fusion devices. High quantum number states of the Balmer series of deuterium are used to study recombination. On EAST (Experimental Advanced Superconducting Tokamak), two visible spectroscopic measurements are applied for the upper/lower divertor with 13 channels, respectively. Both systems are coupled with Princeton Instruments ProEM EMCCD 1024B camera: one is equipped on an Acton SP2750 spectrometer, which has a high spectral resolution ∼0...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27902842/vagal-denervation-inhibits-the-increase-in-pulmonary-blood-flow-during-partial-lung-aeration-at-birth
#14
Justin A R Lang, James T Pearson, Corinna Binder-Heschl, Megan J Wallace, Melissa L Siew, Marcus J Kitchen, Arjan B Te Pas, Robert A Lewis, Graeme R Polglase, Mikiyasu Shirai, Stuart B Hooper
Air entry into the lungs at birth triggers major cardiovascular changes, including a large increase in pulmonary blood flow (PBF) that is not spatially related to regional lung aeration. To investigate the possible underlying role of a vagally-mediated stimulus, we used simultaneous phase-contrast X-ray imaging and angiography in near-term (30 days of gestation) vagotomised (n = 15) or sham-operated (n = 15) rabbit kittens. Rabbits were imaged before ventilation, when one lung was ventilated (unilateral) with 100% nitrogen (N2 ), air or 100% oxygen (O2 ), before all kittens were switched to unilateral ventilation in air, then ventilation of both lungs using air...
November 30, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27896929/impact-of-inflammation-and-oxidative-stress-on-carotid-intima-media-thickness-in-obstructive-sleep-apnea-patients-without-metabolic-syndrome
#15
Ya-Ting Chang, Hsin-Ching Lin, Wen-Neng Chang, Nai-Wen Tsai, Chih-Cheng Huang, Hung-Chen Wang, Chia-Te Kung, Yu-Jih Su, Wei-Che Lin, Ben-Chung Cheng, Chih-Min Su, Ting-Yao Chen, Yi-Fang Chiang, Cheng-Hsien Lu
Obstructive sleep apnea (OSA) increases the risk of cardiovascular diseases, and carotid intima-media thickness (IMT) is a good indicator of the severity of atherosclerotic disease. This study tested the hypothesis that inflammation and oxidative stress determined carotid IMT in patients with OSA. The carotid IMT, mean systolic and diastolic pressure (night and morning) were significantly higher and the level of thiols and high-density lipoprotein were significantly lower in our 121 OSA patients than in 27 controls (P < 0...
November 28, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27893459/extended-t2-ivim-model-for-correction-of-te-dependence-of-pseudo-diffusion-volume-fraction-in-clinical-diffusion-weighted-magnetic-resonance-imaging
#16
N P Jerome, J A d'Arcy, T Feiweier, D-M Koh, M O Leach, D J Collins, M R Orton
The bi-exponential intravoxel-incoherent-motion (IVIM) model for diffusion-weighted MRI (DWI) fails to account for differential T 2 s in the model compartments, resulting in overestimation of pseudodiffusion fraction f. An extended model, T2-IVIM, allows removal of the confounding echo-time (TE) dependence of f, and provides direct compartment T 2 estimates. Two consented healthy volunteer cohorts (n  =  5, 6) underwent DWI comprising multiple TE/b-value combinations (Protocol 1: TE  =  62-102 ms, b  =  0-250 mm(-2)s, 30 combinations...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27865658/characterization-of-particulate-phase-polycyclic-aromatic-hydrocarbons-emitted-from-incense-burning-and-their-bioreactivity-in-raw264-7-macrophage
#17
Tzu-Ting Yang, Su-Chen Ho, Lu-Te Chuang, Hsiao-Chi Chuang, Ya-Ting Li, Jyun-Jie Wu
This study investigated the effects of particle-bound polycyclic aromatic hydrocarbons (PAHs) produced from burning three incense types on and their bioreactivity in the RAW 264.7 murine macrophage cell line. Gas chromatography/mass spectrometry was used to determine the levels of 16 identified PAHs. Macrophages were exposed to incense particle extracts at concentrations of 0, 3.125, 6.25, 12.5, 25, 50, and 100 μg/mL for 24 h. After exposure, cell viability and nitric oxide (NO) and inflammatory mediator [tumor necrosis factor (TNF)-α] production of the cells were examined...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27863796/reprint-of-extracellular-production-of-tellurium-nanoparticles-by-the-photosynthetic-bacterium-rhodobacter-capsulatus
#18
Roberto Borghese, Marco Brucale, Gianuario Fortunato, Massimiliano Lanzi, Alessio Mezzi, Francesco Valle, Massimiliano Cavallini, Davide Zannoni
The toxic oxyanion tellurite (TeO3(2-)) is acquired by cells of Rhodobacter capsulatus grown anaerobically in the light, via acetate permease ActP2 and then reduced to Te(0) in the cytoplasm as needle-like black precipitates. Interestingly, photosynthetic cultures of R. capsulatus can also generate Te(0) nanoprecipitates (TeNPs) outside the cells upon addition of the redox mediator lawsone (2-hydroxy-1,4-naphtoquinone). TeNPs generation kinetics were monitored to define the optimal conditions to produce TeNPs as a function of various carbon sources and lawsone concentration...
November 15, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27863519/tet-dependent-regulation-of-retrotransposable-elements-in-mouse-embryonic-stem-cells
#19
Lorenzo de la Rica, Özgen Deniz, Kevin C L Cheng, Christopher D Todd, Cristina Cruz, Jonathan Houseley, Miguel R Branco
BACKGROUND: Ten-eleven translocation (TET) enzymes oxidise DNA methylation as part of an active demethylation pathway. Despite extensive research into the role of TETs in genome regulation, little is known about their effect on transposable elements (TEs), which make up nearly half of the mouse and human genomes. Epigenetic mechanisms controlling TEs have the potential to affect their mobility and to drive the co-adoption of TEs for the benefit of the host. RESULTS: We performed a detailed investigation of the role of TET enzymes in the regulation of TEs in mouse embryonic stem cells (ESCs)...
November 18, 2016: Genome Biology
https://www.readbyqxmd.com/read/27852632/predicting-the-chances-of-a-live-birth-after-one-or-more-complete-cycles-of-in-vitro-fertilisation-population-based-study-of-linked-cycle-data-from-113%C3%A2-873-women
#20
David J McLernon, Ewout W Steyerberg, Egbert R Te Velde, Amanda J Lee, Siladitya Bhattacharya
OBJECTIVE:  To develop a prediction model to estimate the chances of a live birth over multiple complete cycles of in vitro fertilisation (IVF) based on a couple's specific characteristics and treatment information. DESIGN:  Population based cohort study. SETTING:  All licensed IVF clinics in the UK. National data from the Human Fertilisation and Embryology Authority register. PARTICIPANTS:  All 253 417 women who started IVF (including intracytoplasmic sperm injection) treatment in the UK from 1999 to 2008 using their own eggs and partner's sperm...
November 16, 2016: BMJ: British Medical Journal
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