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https://www.readbyqxmd.com/read/28647785/fertility-preservation-for-trans-men-frozen-thawed-in-vitro-matured-oocytes-collected-at-the-time-of-ovarian-tissue-processing-exhibit-normal-meiotic%C3%A2-spindles
#1
S Lierman, K Tilleman, K Braeckmans, K Peynshaert, S Weyers, G T'Sjoen, P De Sutter
PURPOSES: At the moment of sex reassignment surgery (SRS), the ovarian tissue is sometimes cryopreserved as fertility preservation option for female-to-male trans men, also called trans men. During this preparation, cumulus-oocyte-complexes (COCs) can be found and in vitro matured. It is not known if these oocytes are developmentally competent. In order to use these oocytes for fertility preservation and subsequent fertilization, a normal spindle structure before and after vitrification is necessary...
June 24, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28643935/efficacy-of-self-adjusting-file-xp-endo-finisher-and-passive-ultrasonic-irrigation-on-the-removal-of-calcium-hydroxide-paste-from-an-artificial-standardized-groove
#2
Anda Kfir, Nuphar Blau-Venezia, Tomer Goldberger, Itzhak Abramovitz, Ronald Wigler
The purpose of this study was to compare the effectiveness of self-adjusting file (SAF), XP-endo finisher (XP), passive ultrasonic irrigation (PUI) and conventional syringe and needle irrigation (SNI) in the removal of Ca(OH)2 from an artificial groove. Eighty mandibular incisors with single oval canals were prepared to size 40/0.04 and split longitudinally. A standardised groove was prepared in the apical third and filled with Ca(OH)2 . The root halves were reassembled and divided into two control groups (n = 4) and four experimental groups (n = 18) according to the removal methods used...
June 23, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28640308/photoconductivity-and-magnetoconductance-effects-on-vacuum-vapor-deposition-films-of-weak-charge-transfer-complexes
#3
Ken Kato, Shogo Hagi, Masumi Hinoshita, Eiji Shikoh, Yoshio Teki
Thin films of weak charge-transfer (CT) complexes (pyrene/dimethylpyromellitdiimide or pyrene/pyromellitic dianhydride) were prepared on an interdigitated platinum electrode by vacuum vapor deposition. Their photoconductivity and magnetoconductance (MC) effects were investigated, and mobile triplet excitons (probably CT excitons) were detected by time-resolved ESR (TRESR) at room temperature. The MC effect on the photocurrent was observed and analyzed by quantum-mechanical simulation assuming two types of collision mechanisms between the electron and hole carriers and between the trapped triplet excitons and mobile carriers...
June 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28638636/crystal-structure-and-electrochemical-properties-of-ni-bztmpen-ch3cn-bf4-2-bztmpen-is-n-benzyl-n-n-n-tris-6-methyl-pyridin-2-yl-meth-yl-ethane-1-2-di-amine
#4
Lin Chen, Gan Ren, Yakun Guo, Ge Sang
The mononuclear nickel title complex (acetonitrile-κN){N-benzyl-N,N',N'-tris-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine}-nickel(II) bis-(tetra-fluor-ido-borate), [Ni(C30H35N5)(CH3CN)](BF4)2, was prepared from the reaction of Ni(BF4)2·6H2O with N-benzyl-N,N',N'-tris-[(6-methyl-pyridin-2-yl)meth-yl]ethane-1,2-di-amine (bztmpen) in aceto-nitrile at room temperature. With an open site occupied by the aceto-nitrile mol-ecule, the nickel(II) atom is chelated by five N-atom sites from the ligand and one N atom from the ligand, showing an overall octa-hedral coordination environment...
June 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28624430/comparative-assessment-of-immune-complex-mediated-hypersensitivity-reactions-with-biotherapeutics-in-the-non-human-primate-critical-parameters-safety-and-lessons-for-future-studies
#5
Sven Kronenberg, Elisabeth Husar, Christine Schubert, Christian Freichel, Thomas Emrich, Martin Lechmann, Anna Maria Giusti, Franziska Regenass
With the emergence of novel biotherapeutic formats and immunostimulatory biotherapeutics in cancer immunotherapy, an understanding of immune-complex (IC) mediated hypersensitivity reactions in toxicology studies - and their differentiation from pharmacology - remains key to the preclinical evaluation of these drugs. In this review we provide an in-depth evaluation and comparison of case examples where IC-mediated hypersensitivity reactions were observed in cynomolgus monkeys. We provide details of the parameters evaluated in each study to substantiate and guide the interpretation of these findings...
June 15, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28622725/self-supported-biocarbon-fiber-electrode-decorated-with-molybdenum-carbide-nanoparticles-for-highly-active-hydrogen-evolution-reaction
#6
Jian Xiao, Yan Zhang, Zheye Zhang, Qi-Ying Lv, Feng Jing, Kai Chi, Shuai Wang
To devise and facilely synthesize an efficient noble metal-free electrocatalyst for accelerating the sluggish kinetics in the hydrogen evolution reaction (HER) are still a big challenge for electrolytic water splitting. Herein, we present a simple one-step approach for constructing self-supported biocarbon fiber cloth decorated with molybdenum carbide nanoparticles (BCF/Mo2C) electrodes by a direct annealing treatment of the Mo oxyanions loaded cotton T-shirt. The Mo2C nanoparticles not only serve as the catalytic active sites toward the HER but also enhance the hydrophilicity and conductivity of resultant electrodes...
June 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28604587/optimization-of-perovskite-gas-sensor-performance-characterization-measurement-and-experimental-design
#7
Francesco Bertocci, Ada Fort, Valerio Vignoli, Marco Mugnaini, Rossella Berni
Eight different types of nanostructured perovskites based on YCoO 3 with different chemical compositions are prepared as gas sensor materials, and they are studied with two target gases NO 2 and CO. Moreover, a statistical approach is adopted to optimize their performance. The innovative contribution is carried out through a split-plot design planning and modeling, also involving random effects, for studying Metal Oxide Semiconductors (MOX) sensors in a robust design context. The statistical results prove the validity of the proposed approach; in fact, for each material type, the variation of the electrical resistance achieves a satisfactory optimized value conditional to the working temperature and by controlling for the gas concentration variability...
June 10, 2017: Sensors
https://www.readbyqxmd.com/read/28598332/engineering-phase-transformation-of-cobalt-selenide-in-carbon-cages-and-their-bifunctional-electrocatalytic-activity-for-water-splitting
#8
Hua-Jun Qiu, Jiaojiao Gao, Yu Wang, Li Liu
Using Co-based metal-organic frameworks (MOFs) as precursor, we synthesized cobalt selenide (CoSe2) nanoparticles imbedded in carbon cages. By simply controlling the annealing conditions, phase transformation of CoSe2 from orthorhombic phase to cubic phase has been realized. Benefitting from the metallic character, the cubic phase CoSe2 shows much enhanced electrocatalytic activities for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The as-prepared cubic phase CoSe2 electrode possesses onset overpotentials of 43 and 200 mV, Tafel slopes of 51 and 83 mV dec-1 for HER and OER, respectively, which are remarkably superior to that of orthorhombic phase CoSe2 catalyst and comparable to those of commercial noble-metal catalysts...
June 9, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28597504/gold-core-lead-shell-nanoparticle-loaded-titanium-iv-oxide-prepared-by-underpotential-photodeposition-plasmonic-water-oxidation
#9
Hiroaki Tada, Ryo Negishi, Shin-Ichi Naya, Hisayoshi Kobayashi
Underpotential photodeposition of Pb yields its ultrathin shell layer selectively on the Au(111) surface of Au nanoparticle (NP)-loaded TiO2 (Au/TiO2) with heteroepitaxial nanojunction. The localized surface plasmon resonance of Au/TiO2 undergoes no damping with the Pb-shell formation, and the Pb shell possesses resistance to aerobic oxidation. Mesoporous films comprising of the Au(core)-Pb(shell) NP-loaded TiO2 and unmodified Au/TiO2 were formed on fluorine-doped tin oxide (FTO) electrode. Using them as the photoanode, photoelectrochemical cells were fabricated, and the photocurrent was measured under illumination of simulated sunlight...
June 9, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28590476/boron-doped-graphitic-carbon-nitride-nanosheets-for-enhanced-visible-light-photocatalytic-water-splitting
#10
Supphasin Thaweesak, Songcan Wang, Miaoqiang Lyu, Mu Xiao, Piangjai Peerakiatkhajohn, Lianzhou Wang
A new type of boron-doped graphitic carbon nitride (B-g-C3N4) nanosheets was prepared by a benign one-pot thermal polycondensation process. Systematic studies revealed that a B-doping amount of 1 at% into g-C3N4 (1at%B-g-C3N4) showed the best photocatalytic H2 evolution activity of 1880 μmol h(-1) g(-1) under visible light irradiation (>400 nm), which is more than 12 times that of the pristine g-C3N4 bulk. Detailed characterizations revealed that the high photocatalytic performance could be attributed to the combination of band structure engineering and morphological control...
June 7, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28582296/free-vastus-intermedius-muscle-flap-a-successful-alternative-for-complex-reconstruction-of-the-neurocranium-in-preoperated-patients
#11
Dominik Horn, Christian Freudlsperger, Moritz Berger, Kolja Freier, Oliver Ristow, Jürgen Hoffmann, Oliver Sakowitz, Michael Engel
The reconstruction of large cranial and scalp defects is a surgical and esthetic challenge. Single autologous tissue transfer can be insufficient due to the defect size and the anatomic complexity of the recipient site. Alloplastic patient-specific preformed implants can be used to recover hard tissue defects of the neurocranium. Nevertheless, for long-term success adequate soft tissue support is required. In this brief clinical study, the authors describe calvarian reconstruction in a 33-year-old patient with wound healing disorder after an initial resection of ependymoma...
June 2, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28580963/ultrathin-metal-organic-framework-array-for-efficient-electrocatalytic-water-splitting
#12
Jingjing Duan, Sheng Chen, Chuan Zhao
Two-dimensional metal-organic frameworks represent a family of materials with attractive chemical and structural properties, which are usually prepared in the form of bulk powders. Here we show a generic approach to fabricate ultrathin nanosheet array of metal-organic frameworks on different substrates through a dissolution-crystallization mechanism. These materials exhibit intriguing properties for electrocatalysis including highly exposed active molecular metal sites owning to ultra-small thickness of nanosheets, improved electrical conductivity and a combination of hierarchical porosity...
June 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/28573277/synthesis-of-batao2n-oxynitride-from-ba-rich-oxide-precursor-for-construction-of-visible-light-driven-z-scheme-overall-water-splitting
#13
Beibei Dong, Yu Qi, Junyan Cui, Baodan Liu, Fengqiang Xiong, Xin Jiang, Zheng Li, Yejun Xiao, Fuxiang Zhang, Can Li
Barium tantalum oxynitride (BaTaO2N) with an absorption edge of ca. 660 nm is one of the most promising photocatalysts for solar water splitting, and is usually synthesized by nitriding a mixture of Ba and Ta-containing compounds with a Ba/Ta molar ratio of unity under ammonia flow at high temperature, usually causing a high density of defect sites. Herein, we introduce a novel synthesis method for BaTaO2N (BTON) by employing Ba-rich LiBa4Ta3O12, prepared by a flux method, as a precursor of nitridation. As a comparison, BaTaOx was prepared by conventional solid state reaction and used as the precursor...
June 2, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28570069/electrochemical-growth-of-copper-hydroxy-double-salt-films-and-their-conversion-to-nanostructured-p-type-cuo-photocathodes
#14
Allison C Cardiel, Kenneth J McDonald, Kyoung-Shin Choi
New electrochemical synthesis methods were developed to produce copper hydroxy double salt(Cu-HDS) films with four different intercalated anions (NO3(-), SO4(2-), Cl(-), and dodecyl sulfate (DS)) as pure crystalline films as deposited (Cu2NO3(OH)3, Cu4SO4(OH)6, Cu2Cl(OH)3, and Cu2DS(OH)3). These methods are based on p-benzoquinone reduction, which increases the local pH at the working electrode and triggers the precipitation of Cu(2+) and appropriate anions as Cu-HDS films on the working electrode. The resulting Cu-HDS films could be converted to crystalline Cu(OH)2 and CuO films by immersing them in basic solutions...
June 1, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28567641/cell-free-synthesis-of-plant-receptor-kinases
#15
Akira Nozawa, Keiichirou Nemoto, Shunsuke Nomura, Satoshi Yamanaka, Kohki Kido, Tatsuya Sawasaki
The wheat germ cell-free protein synthesis system has been used as a eukaryotic protein production system since it was first reported in 1964. Although initially the productivity of this system was not very high, it has now become one of the most versatile protein production systems, thanks to the enhancements made by several groups. In this chapter, we report a protein production method for plant receptor kinases using the wheat cell-free system. We describe a method for the preparation of a cell-free extract from wheat germ, the split-primer PCR method for preparation of transcription templates, and the bilayer cell-free protein synthesis method...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28560876/facile-and-large-area-preparation-of-porous-ag3po4-photoanodes-for-enhanced-photoelectrochemical-water-oxidation
#16
Qi Cao, Jun Yu, Kaiping Yuan, Miao Zhong, Jean-Jacques Delaunay
Photoelectrochemical (PEC) water splitting is a promising approach for renewable energy, where the development of efficient photoelectrodes, especially photoanodes for water oxidation is still challenging. In this paper, we report the novel solution-processed microcrystalline Ag3PO4 photoanodes with tunable porosity depending on the reaction time. These porous Ag3PO4 films were grown on large-area (4.5 × 4.5 cm(2)) silver substrates via an air-exposed and room-temperature immersion reaction. Enhanced light absorption abilities were exhibited by the synthesized Ag3PO4 films with optimized porosity resulted from prolonged reaction times (≥ 20 h), owing to which appreciable water splitting performance was demonstrated when they were utilized as photoanodes...
May 31, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28557055/time-efficient-and-flexible-design-of-optimized-multishell-hardi-diffusion
#17
Jana Hutter, J Donald Tournier, Anthony N Price, Lucilio Cordero-Grande, Emer J Hughes, Shaihan Malik, Johannes Steinweg, Matteo Bastiani, Stamatios N Sotiropoulos, Saad Jbabdi, Jesper Andersson, A David Edwards, Joseph V Hajnal
PURPOSE: Advanced diffusion magnetic resonance imaging benefits from collecting as much data as is feasible but is highly sensitive to subject motion and the risk of data loss increases with longer acquisition times. Our purpose was to create a maximally time-efficient and flexible diffusion acquisition capability with built-in robustness to partially acquired or interrupted scans. Our framework has been developed for the developing Human Connectome Project, but different application domains are equally possible...
May 30, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28555205/conventional-drills-vs-piezoelectric-surgery-preparation-for-placement-of-four-immediately-loaded-zygomatic-oncology-implants-in-edentulous-maxillae-results-from-1-year-split-mouth-randomised-controlled-trial
#18
Marco Esposito, Carlo Barausse, Andrea Balercia, Roberto Pistilli, Daniela Rita Ippolito, Pietro Felice
PURPOSE: To compare the outcome of site preparation for zygomatic oncology implants using conventional preparation with rotary drills or piezoelectric surgery with dedicated inserts for placing two zygomatic implants per zygoma according to a split-mouth design. MATERIALS AND METHODS: Twenty edentulous patients with severely atrophic maxillas not having sufficient bone volume for placing dental implants and less than 4 mm of bone height subantrally had their hemi-maxillas randomised according to a split-mouth design into implant site preparation with conventional rotational drills or piezoelectric surgery...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/28548907/evaluation-of-thermal-optical-analysis-method-of-elemental-carbon-for-marine-fuel-exhaust
#19
Maija K Lappi, Jyrki P Ristimäki
The awareness of black carbon (BC) as the second largest anthropogenic contributor in global warming and an ice melting enhancer has increased. Due to prospected increase in shipping especially in the Arctic reliability of BC emissions and their invented amounts from ships is gaining more attention. The International Maritime Organisation (IMO) is actively working towards estimation of quantities and effects of BC especially in the Arctic. IMO has launched work towards constituting a definition for BC and agreeing appropriate methods for its determination from shipping emission sources...
May 26, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28544425/free-standing-holey-ni-oh-2-nanosheets-with-enhanced-activity-for-water-oxidation
#20
Xiangkai Kong, Changlin Zhang, Sang Youp Hwang, Qianwang Chen, Zhenmeng Peng
Electrochemical water oxidation is the key technology in water-splitting reactions and rechargeable metal-air batteries, which is very attractive for renewable energy conversion and storage. Replacement of precious catalysts with cost-effective and highly active alternatives is still a great challenge. Herein, based on theoretical predictions, holey structures are designed and fabricated on the free-standing conventional 2D OER catalyst. By well-controlled defects engineering, uniform tiny holes are created on the free-standing Ni(OH)2 nanosheets via a sol-gel method, with the embedded Zn components as the template for holes production...
May 19, 2017: Small
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