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https://www.readbyqxmd.com/read/29334209/comparison-of-the-effects-of-vitrification-on-gene-expression-of-mature-mouse-oocytes-using-cryotop-and-open-pulled-straw
#1
Fardin Amidi, Zahra Khodabandeh, Mohamad Hossain Nori Mogahi
Background: Oocyte cryopreservation is an essential part of the assisted reproductive technology (ART), which was recently introduced into clinical practice. This study aimed to evaluate the effects of two vitrification systems-Cryotop and Open Pulled Straw (OPS)-on mature oocytes gene expressions. MATERIALS AND METHODS: In this experimental study, the survival rate of metaphase II (MII) mouse oocytes were assessed after cryopreservation by vitrification via i. OPS or ii...
April 2018: International Journal of Fertility & Sterility
https://www.readbyqxmd.com/read/29333771/-effect-of-hydrofluoric-acid-concentration-on-the-surface-morphology-and-bonding-effectiveness-of-lithium-disilicate-glass-ceramics-to-resin-composites
#2
Qian Hailan, Ren Lingyan, Nie Rongrong, Meng Xiangfeng
OBJECTIVE: This study aimed at determining the influence of hydrofluoric acid (HF) in varied concentrations on the surface morphology of lithium disilicate glass ceramics and bond durability between resin composites and post-treated lithium disilicate glass ceramics. METHODS: After being sintered, ground, and washed, 72 as-prepared specimens of lithium disilicate glass ceramics with dimensions of 11 mm×13 mm×2 mm were randomly divided into three groups. Each group was treated with acid solution [32% phosphoric acid (PA) or 4% or 9...
December 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29333625/k3li3gd7-bo3-9-a-new-gadolinium-rich-orthoborate-for-cryogenic-magnetic-cooling
#3
Mingjun Xia, Shipeng Shen, Jun Lu, Young Sun, R K Li
Magnetic cooling technology based on magnetocaloric effect (MCE) has attracted great interest in obtaining extreme low temperature, e. g. for space exploration. Here we grew a new gadolinium-rich orthoborate K3Li3Gd7(BO3)9 (1) as a promising cryogenic magnetic coolant. It exhibits complicated three dimensional framework constructed from BO3 groups and gadolinium-oxygen chains. The Gd-O chain consists of two types of clusters of Gd3O20 and Gd3O19 interconncetion by Gd(4)O8 polyhydron. Thanks to its high gadolinium concentration, a large -Sm for 1 was obtained as 56...
January 15, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29332243/photosystem-i-with-benzoquinone-analogues-incorporated-into-the-a1-binding-site
#4
Hiroki Makita, Gary Hastings
Time-resolved FTIR difference spectroscopy has been used to study photosystem I (PSI) particles with three different benzoquinones [plastoquinone-9 (PQ), 2,6-dimethyl-1,4-benzoquinone (DMBQ), 2,3,5,6-tetrachloro-1,4-benzoquinone (Cl4BQ)] incorporated into the A1 binding site. If PSI samples are cooled in the dark to 77 K, the incorporated benzoquinones are shown to be functional, allowing the production of time-resolved (P700+A1--P700A1) FTIR difference spectra. If samples are subjected to repetitive flash illumination at room temperature prior to cooling, however, the time-resolved FTIR difference spectra at 77 K display contributions typical of the P700 triplet state (3P700), indicating a loss of functionality of the incorporated benzoquinones, that occurs because of double protonation of the incorporated benzoquinones...
January 13, 2018: Photosynthesis Research
https://www.readbyqxmd.com/read/29331470/the-effect-of-different-precooling-rates-and-cold-storage-on-milk-microbiological-quality-and-composition
#5
Lizandra F Paludetti, Alan L Kelly, Bernadette O'Brien, Kieran Jordan, David Gleeson
The objective of this study was to measure the effect of different milk cooling rates, before entering the bulk tank, on the microbiological load and composition of the milk, as well as on energy usage. Three milk precooling treatments were applied before milk entered 3 identical bulk milk tanks: no plate cooler (NP), single-stage plate cooler (SP), and double-stage plate cooler (DP). These precooling treatments cooled the milk to 32.0 ± 1.4°C, 17.0 ± 2.8°C, and 6.0 ± 1.1°C, respectively. Milk was added to the bulk tank twice daily for 72 h, and the tank refrigeration temperature was set at 3°C...
January 10, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29331143/effects-of-system-size-and-cooling-rate-on-the-structure-and-properties-of-sodium-borosilicate-glasses-from-molecular-dynamics-simulations
#6
Lu Deng, Jincheng Du
Borosilicate glasses form an important glass forming system in both glass science and technologies. The structure and property changes of borosilicate glasses as a function of thermal history in terms of cooling rate during glass formation and simulation system sizes used in classical molecular dynamics (MD) simulation were investigated with recently developed composition dependent partial charge potentials. Short and medium range structural features such as boron coordination, Si and B Qn distributions, and ring size distributions were analyzed to elucidate the effects of cooling rate and simulation system size on these structure features and selected glass properties such as glass transition temperature, vibration density of states, and mechanical properties...
January 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29331132/detection-and-characterization-of-the-tin-dihydride-snh2-and-snd2-molecule-in-the-gas-phase
#7
Tony C Smith, Dennis J Clouthier
The SnH2 and SnD2 molecules have been detected for the first time in the gas phase by laser-induced fluorescence (LIF) and emission spectroscopic techniques through the Ã1B1-X̃1A1 electronic transition. These reactive species were prepared in a pulsed electric discharge jet using (CH3)4Sn or SnH4/SnD4 precursors diluted in high pressure argon. Transitions to the electronic excited state of the jet-cooled molecules were probed with LIF, and the ground state energy levels were measured from single rovibronic level emission spectra...
January 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29330506/impact-of-wave-whitecapping-on-land-falling-tropical-cyclones
#8
Nicolas Bruneau, Ralf Toumi, Shuai Wang
Predicting tropical cyclone structure and evolution remains challenging. Particularly, the surface wave interactions with the continental shelf and their impact on tropical cyclones have received very little attention. Through a series of state-of-the-art high-resolution, fully-coupled ocean-wave and atmosphere-ocean-wave experiments, we show here, for the first time, that in presence of continental shelf waves can cause substantial cooling of the sea surface. Through whitecapping there is a transfer of momentum from the surface which drives deeper vertical mixing...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29329212/study-of-the-thermal-properties-and-the-fire-performance-of-flame-retardant-organic-pcm-in-bulk-form
#9
Anabel Palacios, Alvaro De Gracia, Laia Haurie, Luisa F Cabeza, A Inés Fernández, Camila Barreneche
The implementation of organic phase change materials (PCMs) in several applications such as heating and cooling or building comfort is an important target in thermal energy storage (TES). However, one of the major drawbacks of organic PCMs implementation is flammability. The addition of flame retardants to PCMs or shape-stabilized PCMs is one of the approaches to address this problem and improve their final deployment in the building material sector. In this study, the most common organic PCM, Paraffin RT-21, and fatty acids mixtures of capric acid (CA), myristic acid (MA), and palmitic acid (PA) in bulk, were tested to improve their fire reaction...
January 12, 2018: Materials
https://www.readbyqxmd.com/read/29329199/pressure-induced-densification-and-compression-in-a-reprocessed-borosilicate-glass
#10
Kathryn J Ham, Yoshio Kono, Parimal J Patel, Steven M Kilczewski, Yogesh K Vohra
Pressure induced densification and compression of a reprocessed sample of borosilicate glass has been studied by X-ray radiography and energy dispersive X-ray diffraction using a Paris-Edinburgh (PE) press at a synchrotron X-ray source. The reprocessing of a commercial borosilicate glass was carried out by cyclical melting and cooling. Gold foil pressure markers were used to obtain the sample pressure by X-ray diffraction using its known equation of state, while X-ray radiography provided a direct measure of the sample volume at high pressure...
January 12, 2018: Materials
https://www.readbyqxmd.com/read/29329067/case-report-iatrogenic-brachial-artery-dissection-with-complete-anterograde-occlusion-during-elective-arterial-line-placement
#11
Laurence Weinberg, Diana Abu-Ssaydeh, Manfred Spanger, Patrick Lu, Michael H-G Li
INTRODUCTION: Brachial arterial catheters provide a more accurate reflection of central aortic arterial pressure compared to their radial counterparts. Although brachial arterial line complications are uncommon, we report a case of a rare iatrogenic brachial artery dissection with complete anterograde occlusion from elective arterial line placement. PRESENTATION OF CASE: A 41-year-old female presented for a right upper and middle lobe resection of a large neuroendocrine lung cancer...
December 27, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29328711/measurement-of-the-frequency-of-the-2%C3%A2-3-s-2%C3%A2-3-p-transition-of-4-he
#12
X Zheng, Y R Sun, J-J Chen, W Jiang, K Pachucki, S-M Hu
The 2 ^{3}S-2 ^{3}P transition of ^{4}He was measured by comb-linked laser spectroscopy using a transverse-cooled atomic beam. The centroid frequency was determined to be 276 736 495 600.0(1.4) kHz, with a fractional uncertainty of 5.1×10^{-12}. This value is not only more accurate but also differs by as much as -49.5  kHz (20σ) from the previous result given by [Cancio Pastor et al., Phys. Rev. Lett. 92, 023001 (2004)PRLTAO0031-900710.1103/PhysRevLett.92.023001; Cancio Pastor et al.Phys. Rev...
December 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29327747/temperature-and-excitation-wavelength-dependent-emission-in-a-manganese-ii-complex
#13
Alexey S Berezin, Katerina A Vinogradova, Vladimir A Nadolinny, Taisiya S Sukhikh, Viktor P Krivopalov, Elena B Nikolaenkova, Mark B Bushuev
A mononuclear manganese(ii) complex with a chelating 4-(3,5-diphenyl-1H-pyrazol-1-yl)-6-(piperidin-1-yl)pyrimidine ligand (L), [MnL2Cl2]·H2O, shows intriguing excitation wavelength-dependent emission. Depending on the excitation wavelength, the complex demonstrates three emission bands with the maxima at 380 nm, 440 nm and 495 nm. The 380 nm and 440 nm emissions originate from the π → π* and n → π* ligand-centered transitions. The long-wave 495 nm emission with microsecond lifetimes is related to the d-d transitions and/or metal-to-ligand and halogen-to-ligand charge transfer...
January 12, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29325957/effect-and-feasibility-of-therapeutic-hypothermia-in-patients-with-hemorrhagic-stroke-a-systematic-review-and-meta-analysis
#14
REVIEW
Zhong Yao, Chao You, Min He
INTRODUCTION: Therapeutic hypothermia (TH) has shown a good performance in the experimental hemorrhagic stroke. But the clinical application of TH remains controversial since reports regarding its therapeutic effect are inconsistent. METHODS: We conducted a systematic review based on Preferred Reporting Items for Systematic Reviews and Meta-analyses. Compare TH with control group in terms of mortality, the poor outcome, delayed cerebral ischemia (DCI) and specific complications...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29325753/induced-hypothermia-in-patients-with-septic-shock-and-respiratory-failure-cass-a-randomised-controlled-open-label-trial
#15
Theis Skovsgaard Itenov, Maria Egede Johansen, Morten Bestle, Katrin Thormar, Lars Hein, Louise Gyldensted, Anne Lindhardt, Henrik Christensen, Stine Estrup, Henrik Planck Pedersen, Matthew Harmon, Uday Kant Soni, Silvia Perez-Protto, Nicolai Wesche, Ulrik Skram, John Asger Petersen, Thomas Mohr, Tina Waldau, Lone Musaeus Poulsen, Ditte Strange, Nicole P Juffermans, Daniel I Sessler, Else Tønnesen, Kirsten Møller, Dennis Karsten Kristensen, Alessandro Cozzi-Lepri, Jens D Lundgren, Jens-Ulrik Jensen
BACKGROUND: Animal models of serious infection suggest that 24 h of induced hypothermia improves circulatory and respiratory function and reduces mortality. We tested the hypothesis that a reduction of core temperature to 32-34°C attenuates organ dysfunction and reduces mortality in ventilator-dependent patients with septic shock. METHODS: In this randomised, controlled, open-label trial, we recruited patients from ten intensive care units (ICUs) in three countries in Europe and North America...
January 8, 2018: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29325380/-could-binocular-treatment-be-a-substitute-for-patching
#16
X F Shi, K X Zhao
Amblyopia is a common eye disease with a high prevalence in clinical practice of pediatric ophthalmology and strabismus. The primary treatment strategy for amblyopia is precise correction of refractive errors and patching of the dominant eye. The application of patching has a history of more than 200 years, and now is still the most effective method for treatment of amblyopia. Similar to the principle of traditional patching, atropine penalization has been testified that it can be used as an initial treatment for amblyopia with similar therapeutic effects as patching...
December 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29325158/influence-of-light-sources-and-photoperiod-on-growth-performance-carcass-characteristics-and-health-indices-of-broilers-grown-to-heavy-weights2
#17
H A Olanrewaju, W W Miller, W R Maslin, S D Collier, J L Purswell, S L Branton
Effects of light sources and photoperiod on growth performance, carcass characteristics and health indices of broilers were investigated in 4 trials. In each trial, 720 1-day-old Ross × Ross 708 chicks were randomly distributed into 12 environmentally controlled rooms (30 males/30 females/room). The experimental design was a 4 × 3 factorial treatments consisted of 4 light sources [incandescent (ICD, standard), compact fluorescent (CFL), neutral light-emitting diode (Neutral-LED), and cool poultry-specific filtered LED (Cool-PSF-LED)] and 3 photoperiods [long/continuous (23L:1D), regular/intermittent (2L:2D), and short/non-intermittent (8L:16D)] from d8-d56...
January 6, 2018: Poultry Science
https://www.readbyqxmd.com/read/29325114/distribution-of-pines-in-the-iberian-peninsula-agrees-with-species-differences-in-foliage-frost-tolerance-not-with-vulnerability-to-freezing-induced-xylem-embolism
#18
Laura Fernández-Pérez, Pedro Villar-Salvador, Jordi Martínez-Vilalta, Andrei Toca, Miguel A Zavala
Drought and frosts are major determinants of plant functioning and distribution. Both stresses can cause xylem embolism and foliage damage. The objective of this study was to analyse if the distribution of six common pine species along latitudinal and altitudinal gradients in Europe is related to their interspecific differences in frost tolerance and to the physiological mechanisms underlying species-specific frost tolerance. We also evaluate if frost tolerance depends on plant water status. We studied survival to a range of freezing temperatures in 2-year-old plants and assessed the percentage loss of hydraulic conductivity (PLC) due xylem embolism formation and foliage damage determined by needle electrolyte leakage (EL) after a single frost cycle to -15 °C and over a range of predawn water potential (ψpd) values...
January 9, 2018: Tree Physiology
https://www.readbyqxmd.com/read/29324658/study-of-the-microstructure-and-cracking-mechanisms-of-hastelloy-x-produced-by-laser-powder-bed-fusion
#19
Giulio Marchese, Gloria Basile, Emilio Bassini, Alberta Aversa, Mariangela Lombardi, Daniele Ugues, Paolo Fino, Sara Biamino
Hastelloy X (HX) is a Ni-based superalloy which suffers from high crack susceptibility during the laser powder bed fusion (LPBF) process. In this work, the microstructure of as-built HX samples was rigorously investigated to understand the main mechanisms leading to crack formation. The microstructural features of as-built HX samples consisted of very fine dendrite architectures with dimensions typically less than 1 µm, coupled with the formation of sub-micrometric carbides, the largest ones were mainly distributed along the interdendritic regions and grain boundaries...
January 11, 2018: Materials
https://www.readbyqxmd.com/read/29324576/intermittent-cooling-during-judo-training-in-a-warm-humid-environment-reduces-autonomic-and-hormonal-impact
#20
Eduardo Carballeira, José Morales, David H Fukuda, María L Granada, Vicente Carratalá-Deval, Alfonso López Díaz de Durana, Jeffrey R Stout
The purpose of this study was to identify the effects of superficial cooling on physiological responses while training in a warm, humid environment during an international judo training camp. Sixteen judokas (8 women and 8 men) participated in the experiment. Four high-level women and four men were randomly assigned to wear a cooling vest (vest group, VG) during the recovery periods within a training session (i.e. 8 bouts of 5 min fighting with 5 min rest) and up to 10 min after the session, while the remaining athletes in the control group (CG) trained without the use of any cooling aids...
January 5, 2018: Journal of Strength and Conditioning Research
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