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https://www.readbyqxmd.com/read/28445637/control-of-charge-carriers-trapping-and-relaxation-in-hematite-by-oxygen-vacancy-charge-ab-initio-non-adiabatic-molecular-dynamics
#1
Zhaohui Zhou, Jin Liu, Run Long, Linqiu Li, Liejin Guo, Oleg V Prezhdo
Ultrafast charge recombination in hematite (α-Fe2O3) severely limits its applications in solar energy conversion and utilization, for instance, in photo-electrochemical water splitting. We report the first time-domain ab initio study of charge relaxation dynamics in α-Fe2O3 with and without the oxygen vacancy (Ov) defect, using non-adiabatic molecular dynamics implemented within time-dependent density functional theory. The simulations show that the hole trapping is the rate-limiting step in the electron-hole recombination process for both neutral and ionized Ov systems...
April 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28445634/low-temperature-associated-interface-influence-on-the-black-phosphorus-nanoflakes
#2
Peng Huang, Dan Guo, Guoxin Xie
The temperature dependent structure properties of few-layer black phosphorus (BP) nanoflakes supported on the Si substrate and suspended on the holes are investigated using the Raman spectroscopy in the range of 77-293 K. The temperature coefficients of three main Raman modes for supported BP are larger than those of suspended BP because of the interface effects, mainly the tensile strain and the different thermal expansion coefficients (TEC) between the substrate and BP nanoflakes. The out-of-plane vibration is more apt to be affected by the initial strain while the influence on the in-plane vibrations is negligible...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28445484/transcriptome-analysis-of-creeping-bentgrass-exposed-to-drought-stress-and-polyamine-treatment
#3
Yingmei Ma, Vijaya Shukla, Emily B Merewitz
Creeping bentgrass is an important cool-season turfgrass species sensitive to drought. Treatment with polyamines (PAs) has been shown to improve drought tolerance; however, the mechanism is not yet fully understood. Therefore, this study aimed to evaluate transcriptome changes of creeping bentgrass in response to drought and exogenous spermidine (Spd) application using RNA sequencing (RNA-Seq). The high-quality sequences were assembled and 18,682 out of 49,190 (38%) were detected as coding sequences. A total of 22% and 19% of genes were found to be either up- or down-regulated due to drought while 20% and 34% genes were either up- or down- regulated in response to Spd application under drought conditions, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28445087/cardioprotection-by-mild-hypothermia-is-abolished-in-aged-mice
#4
Junjie Guo, Shuning Zhang, Leilei Ma, Hongtao Shi, Jianbing Zhu, Jian Wu, Yi An, Junbo Ge
Mild hypothermia (MH) renders the hearts resistant to ischemia/reperfusion (IR) injury in animal experiments. Unexpectedly, this effect was not observed in recent clinical trials. The aged hearts in mice have been demonstrated to be more susceptible to IR injury. This study aimed to examine whether the cardioprotection of MH was abolished in aged mice. Young (Y, 3 months old) and aged (A, 20 months old) male C57BL/6 mice were randomized into six groups. Sham (Y-SHAM and A-SHAM) and control (Y-CON+IR and A-CON+IR) animals maintained core body temperature at 37°C ± 0...
April 26, 2017: Therapeutic Hypothermia and Temperature Management
https://www.readbyqxmd.com/read/28444954/clinical-presentation-and-outcome-of-children-with-central-diabetes-insipidus-associated-with-a-self-limited-or-transient-pituitary-stalk-thickening-diagnosed-as-infundibuloneurohypophysitis
#5
J Schaefers, M Cools, K De Waele, I Gies, V Beauloye, P Lysy, I Francois, D Beckers, J De Schepper
OBJECTIVE: Despite lymphocytic or autoimmune infundibuloneurohypophysitis (INH) is an increasingly recognized etiology in children with central diabetes insipidus, clinical data on epidemiology (clinical evolution, predisposing factors, complications), diagnosis and management of this entity are limited and mostly based on published case reports. The aim of this study was to gain a broader insight in the natural history of this disease by analyzing the clinical presentation, radiological pituitary stalk changes, associated autoimmunity and hormonal deficiencies in children with CDI and a self-limiting or transient stalk thickening (ST), diagnosed as autoimmune INH, during the last 15 years in four Belgian university hospitals...
April 26, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28444785/liquid-crystalline-elastomers-with-gold-nanoparticle-cross-linkers
#6
Michał Wójcik, Jaroslaw Wrobel, Zuzanna Janczuk, Jozef Mieczkowski, Ewa Gorecka, Joonmyung Choi, Maenghyo Cho, Damian Pociecha
Embedding nanoparticles in a responsive polymer matrix is a formidable way to fabricate hybrid materials with predesigned properties and prospective applications in actuators, mechanically tunable optical elements or electroclinic films. However, achieving chemical compatibility between nanoparticles and organic matter is not trivial and often results in disordered structures. Herein we show that using nanoparticles as exclusive cross-linkers in the preparation of liquid-crystalline polymers can yield long-range ordered liquid-crystalline elastomers with high loading of well dispersed nanoparticles, as confirmed with small angle XRD measurements...
April 26, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28443603/hard-x-ray-photoemission-study-of-yb-sub-1-x-sub-zr-sub-x-sub-b-sub-12-sub-the-effects-of-electron-doping-on-the-kondo-insulator-ybb-sub-12-sub
#7
Awabaikeli Rousuli, Hitoshi Sato, Fumitoshi Iga, Kento Hayashi, Katsuya Ishii, Toru Wada, Toshiki Nagasaki, Kojiro Mimura, Hiroaki Anzai, Katsuya Ichiki, Shigenori Ueda, Akihiro Kondo, Koichi Kindo, Toshiro Takabatake, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi
We have carried out hard x-ray photoemission spectroscopy (HAXPES) of Yb<sub>1-x</sub>Zr<sub>x</sub>B<sub>12</sub> (0 ≤ x ≤ 0.875) to study the effects of electron doping on the Kondo insulator YbB<sub>12</sub>. The Yb valences of Yb<sub>1-x</sub>Zr<sub>x</sub>B<sub>12</sub> at 300 K estimated from the Yb 3d HAXPES spectra decreased after substituting Yb with Zr from 2.93 for YbB<sub>12</sub> to 2.83 for Yb<sub>0...
April 26, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28443564/transpulmonary-hypothermia-with-cooled-oxygen-inhalation-shows-promising-results-as-a-novel-hypothermia-technique
#8
Yahya Ayhan Acar, Banu Karakuş Yılmaz, Duygu Sultan Çelik, Erdem Çevik, Hatice Topçu, Şule Özsoy, Aylin Haklıgör, Orhan Çınar
BACKGROUND: Therapeutic hypothermia was showed to improve neurologic outcome but current therapeutic hypothermia techniques have limitations. Novel techniques such as transpulmonary hypothermia with cooled oxygen inhalation may be beneficial. AIMS: To evaluate the performance of transthoracic hypothermia with cooled medical oxygen inhalation as a therapeutic hypothermia method. STUDY DESIGN: Animal experimentation. METHODS: A total of 36 adult male Wistar-Hannover rats were used in this research...
April 6, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28443340/e-cigs-are-they-cool-talking-to-teens-about-e-cigarettes
#9
Vania Modesto-Lowe, Camille Alvarado
Electronic cigarettes, or e-cigarettes as they are commonly called, have gained wide acceptance among adolescents, especially those with sweet flavors such as bubble gum and cheesecake. Although health effects of e-cigarettes have not been well characterized, their use increases a teen's exposure to nicotine and may serve as a gateway to traditional cigarettes. This article outlines the basics of e-cigarettes and potential health hazards, followed by selected literature on teens' perceptions of e-cigarettes, as well as motivational interviewing strategies that can be used in talking to teens about using electronic cigarettes...
April 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28442788/changes-in-structural-and-pigmentary-colours-in-response-to-cold-stress-in-polyommatus-icarus-butterflies
#10
Krisztián Kertész, Gábor Piszter, Zsolt Endre Horváth, Zsolt Bálint, László Péter Biró
While numerous papers have investigated the effects of thermal stress on the pigmentary colours of butterfly wings, such studies regarding structural colours are mostly lacking, despite the important role they play in sexual communication. To gain insight into the possible differences between the responses of the two kinds of colouration, we investigated the effects of prolonged cold stress (cooling at 5 °C for up to 62 days) on the pupae of Polyommatus icarus butterflies. The wing surfaces coloured by photonic crystal-type nanoarchitectures (dorsal) and by pigments (ventral) showed markedly different behaviours...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442251/liquidus-tracking-large-scale-preservation-of-encapsulated-3-d-cell-cultures-using-a-vitrification-machine
#11
Eva Puschmann, Clare Selden, Steve Butler, Barry Fuller
Currently, cryo-banking of multicellular structures such as organoids, especially in large volumes at clinical scale >1 L, remains elusive for reasons such as insufficient dehydration and cryoprotectant additive (CPA(1)) penetration, slow cooling and warming rates and devitrification processes. Here we introduce the concept of Liquidus Tracking (LT) using a semi-automated process for liquid volumes of up to 450 ml including 130 ml of alginate encapsulated liver cells (AELC) that archived controlled and reversible vitrification with minimized toxicity...
April 22, 2017: Cryobiology
https://www.readbyqxmd.com/read/28442061/effect-of-docosahexanoic-acid-on-quality-of-frozen-thawed-bull-semen-in-bioxcell-extender
#12
Asmatullah Kaka, Wahid Haron, Rosnina Yusoff, Nurhusien Yimer, A M Khumran, Kazhal Sarsaifi, Atique Ahmed Behan, Ubedullah Kaka, Akeel Ahmed Memon, Mahdi Ebrahimi
This study was conducted to investigate the effect of docosahexanoic acid (DHA) supplementation in BioXcell extender on the quality of frozen-thawed bull semen. Twenty-four ejaculates were collected from three bulls (eight from each bull). Ejaculates with motility ≥70% and normal morphology ≥80% were extended into BioXcell extender to which 0 (control), 3, 5, 10 or 15ngmL(-1) DHA was added. The supplemented semen samples were incubated at 37°C for 15min for DHA uptake by spermatozoa. Later, samples were cooled for 2h at 5°C and packaged into 0...
March 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28439849/aortic-valve-replacement-after-coronary-artery-bypass-grafting-with-the-in-situ-right-gastroepiploic-artery-to-the-occluded-right-coronary-artery-using-a-temporary-vein-graft-for-cardioplegia
#13
Yoshifumi Fuke, Toru Yasutsune, Masato Sakamoto
BACKGROUND: The operation of aortic valve replacement (AVR) after CABG is a technically challenging procedure in respect to dissection of living grafts from its surrounding tissue, myocardial protection, and so on, especially that procedure to patients with living in situ functional arterial grafts to occluded native coronary arteries has a special problem in regard to myocardial protection because myocardial blood supply originates from various arteries including the left internal thoracic artery (LITA), the right internal thoracic artery (RITA), and the right gastroepiploic artery (GEA); hence, adequate myocardial protection should be fastidiously considered...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28439065/multidisciplinary-study-of-the-secondary-immune-response-in-grandparents-re-exposed-to-chickenpox
#14
B Ogunjimi, J Van den Bergh, P Meysman, S Heynderickx, K Bergs, H Jansen, E Leuridan, A Vorsters, H Goossens, K Laukens, N Cools, Viggo Van Tendeloo, N Hens, P Van Damme, Evelien Smits, Ph Beutels
Re-exposure to chickenpox may boost varicella-zoster virus (VZV) immunity in the elderly. This secondary immune response is hypothesized to confer protection against herpes zoster. We longitudinally sampled 36 adults over the course of one year after re-exposure to chickenpox. The resulting 183 samples and those of 14 controls were assessed for VZV-specific T-cell immunity and antibody titres. The percentages of VZV-specific CD4+ IL-2-producing T-cells were increased in re-exposed grandparents compared to control participants up to 9 months after re-exposure...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28439003/numerical-evidence-for-thermally-induced-monopoles
#15
Peter Wirnsberger, Domagoj Fijan, Roger A Lightwood, Anđela Šarić, Christoph Dellago, Daan Frenkel
Electric charges are conserved. The same would be expected to hold for magnetic charges, yet magnetic monopoles have never been observed. It is therefore surprising that the laws of nonequilibrium thermodynamics, combined with Maxwell's equations, suggest that colloidal particles heated or cooled in certain polar or paramagnetic solvents may behave as if they carry an electric/magnetic charge. Here, we present numerical simulations that show that the field distribution around a pair of such heated/cooled colloidal particles agrees quantitatively with the theoretical predictions for a pair of oppositely charged electric or magnetic monopoles...
April 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28438971/the-impact-and-efficacy-of-surveillance-in-patients-with-sarcoma-of-the-extremities
#16
P Cool, G Cribb
OBJECTIVES: In this cross sectional study, the impact and the efficacy of a surveillance programme for sarcomas of the extremities was analysed. METHODS: All patients who had treatment with curative intent for a high-grade sarcoma and were diagnosed before 2014 were included and followed for a minimum of two years. RESULTS: Of the 909 patients who had a review appointment in 2014, 131 were under review for a high-grade sarcoma of the extremities following treatment with curative intent...
April 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28438558/cooling-down-thermomorphogenesis-by-uv-b-signaling
#17
Ruohe Yin
PHYTOCHROME-INTERACTING FACTOR 4 (PIF4) is a key transcriptional regulator promoting plant responses to elevated ambient temperatures. A recent study reported that the ultraviolet B radiation (UV-B) photoreceptor UVR8 signaling pathway inhibits PIF4 via multiple mechanisms to repress plant responses to high ambient temperatures.
April 21, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28438181/efficient-vitrification-of-mouse-embryos-using-the-kitasato-vitrification-system-as-a-novel-vitrification-device
#18
Kenji Momozawa, Atsushi Matsuzawa, Yukio Tokunaga, Shiori Abe, Yumi Koyanagi, Miho Kurita, Marina Nakano, Takao Miyake
BACKGROUND: Currently, the cryopreservation of embryos and oocytes is essential for assisted reproductive technology (ART) laboratories worldwide. This study aimed to evaluate the efficacy of the Kitasato Vitrification System (KVS) as a vitrification device for the cryopreservation of mouse embryos to determine whether this novel device can be adapted to the field of ART. METHODS: In Experiment 1, blastocysts were vitrified using the KVS. Vitrified blastocysts were warmed and subsequently cultured for 72 h...
April 24, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28437625/imaging-guided-synergetic-therapy-of-orthotopic-transplantation-tumor-by-superselectively-arterial-administration-of-microwave-induced-microcapsules
#19
Shunsong Tang, Changhui Fu, Longfei Tan, Tianlong Liu, Jingsong Mao, Xiangling Ren, Hongying Su, Dan Long, Qianqian Chai, Zhongbing Huang, Xudong Chen, Jingzhuo Wang, Jun Ren, Xianwei Meng
It is an ambitious target to improve overall Hepatocellular Carcinoma therapeutic effects. Recently, MW ablation has emerged as a powerful thermal ablation technique, affording favorable survival with excellent local tumor control. To achieve better therapeutic effects of MW ablation, MW sensitizers are prepared for enhanced MW ablation to preferentially heat tumor territory. However, it is still not practicable for treatment of the orthotopic transplantation tumor. Herein, biocompatible and degradable methoxy poly(ethylene glycol)-poly(lactic-co-glycolic acid) (mPEG-PLGA) microcapsules with hierarchical structure have been designed for microwave-induced tumor therapy...
April 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28437237/proteomics-in-hypothermia-as-adjunctive-therapy-in-patients-with-st-segment-elevation-myocardial-infarction-a-chill-mi-substudy
#20
Moman A Mohammad, Marco Noc, Irene Lang, Michael Holzer, Peter Clemmensen, Ulf Jensen, Bernhard Metzler, David Erlinge
Cardiovascular and inflammatory biomarkers in therapeutic hypothermia have been studied in cardiac arrest, but data on patients with ST-segment elevation myocardial infarction (STEMI) treated with therapeutic hypothermia are currently unavailable. A multiplex proximity extension assay allowed us to measure 157 cardiovascular disease (CVD) and inflammatory disease-related biomarkers in patients from the international, multicenter, and randomized trial; CHILL-myocardial infarction (MI) and to explore the associations of cardiovascular and inflammatory biomarkers...
March 2, 2017: Therapeutic Hypothermia and Temperature Management
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