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Masanori Tsukamoto, Takashi Hitosugi, Takeshi Yokoyama
BACKGROUND: Endoscopy is one of the most useful clinical techniques in difficult airway management Comparing with the fibroptic endoscope, this compact device is easy to operate and can provide the clear image. In this study, we investigated its usefulness in the preoperative examination of endoscopy. METHODS: Patients undergoing oral maxillofacial surgery were enrolled in this study. We performed preoperative airway examination by electronic endoscope (The CMOS video rhino-laryngoscope, KARL STORZ Endoscopy Japan, Tokyo)...
May 2017: Masui. the Japanese Journal of Anesthesiology
Mark Fishbein, Shannon C K Straub, Julien Boutte, Kimberly Hansen, Richard C Cronn, Aaron Liston
PREMISE OF THE STUDY: Leaf surface traits, such as trichome density and wax production, mediate important ecological processes such as anti-herbivory defense and water-use efficiency. We present a phylogenetic analysis of Asclepias plastomes as a framework for analyzing the evolution of trichome density and presence of epicuticular waxes. METHODS: We produced a maximum-likelihood phylogeny using plastomes of 103 species of Asclepias. We reconstructed ancestral states and used model comparisons in a likelihood framework to analyze character evolution across Asclepias...
April 25, 2018: American Journal of Botany
Aspasia Kanellou, George C Anyfantis, Despoina Chriti, Grigorios Raptopoulos, Marinos Pitsikalis, Patrina Paraskevopoulou
We report the synthesis and characterization of synthetic polymer aerogels based on dendritic-type urethane-norbornene monomers. The core of those monomers is based either on an aromatic/rigid (TIPM/Desmodur RE), or an aliphatic/flexible (Desmodur N3300) triisocyanate. The terminal norbornene groups (three at the tip of each of the three branches) were polymerized via ROMP using the inexpensive 1st generation Grubbs catalyst. The polymerization/gelation conditions were optimized by varying the amount of the catalyst...
April 25, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Seth D Haney, Adam M Siepielski
Global climate change has made what were seemingly extraordinary environmental conditions, such as prolonged droughts, commonplace. One consequence of extreme environmental change is concomitant changes in resource abundance. How will such extreme resource changes impact biodiversity? We developed a trait-based consumer-resource model to examine how resource abundance affects the potential for adaptive evolution and coexistence among competitors. We found that moderate changes in resource abundance have little effect on trait evolution...
May 2018: American Naturalist
Kittikun Thienthong, Manusak Boonard, Artit Boonrod, Kowit Chaisiwamongkol, Suwitcha Sripadungkul
BACKGROUND: Complications following locking plate fixation in proximal humeral fractures often related to malposition plates and inadequate screw fixation. However, literature did not define the best anatomical reference point for plate positioning. We conducted a study to assess the occurrence of subacromial impingement and screw perforation with two anatomical reference points for proximal humeral plate positioning. METHOD: Sixty shoulders of 30 cadavers were dissected, and proximal humeral locking plate was placed in two different levels in the coronal plane of the upper tip of plate: (1) the proximal portion of bicipital groove group and (2) the most prominent of lesser tuberosity group...
April 24, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Yongbing Wen, Jianmin Song, Xinjian Fan, Danish Hussain, Hao Zhang, Hui Xie
An efficient and adaptive boundary tracking method is developed to confine area of interest for high-efficiency local scanning. By using a boundary point determination criterion, the scanning tip is steered with a sinusoidal waveform while estimating azimuth angle and radius ratio of each boundary point to accurately track the boundary of targets. A local scan region and path are subsequently planned based on the prior knowledge of boundary tracking to reduce the scan time. Boundary tracking and local scanning methods have great potential not only for fast dimension measurement but also for sample surface topography and physical characterization, with only scanning region of interest...
2018: Scanning
Sílvio Emanuel Acioly Conrado de Menezes, Shirley Machado Batista, Diego Felipe Brandão de Magalhães, de Albuquerque Diana Santana, Gabriela Queiroz de Melo Monteiro
Introduction: The objective of this in vitro study was to evaluate whether cervical preparation with Mtwo files in a crown-down technique influences instrumentation time and the cyclic fatigue resistance of these instruments. Methods and Materials: Two instrumentation techniques were evaluated (manufacturer and crown-down). Each group consisted of 10 kits containing four Mtwo instruments (10/0.04, 15/0.05, 20/0.06, and 25/0.06), which were used to prepare three standard simulated curved resin canals...
2018: Iranian Endodontic Journal
Mohsen Ramazani, Mohammad Asnaashari, Roghayyeh Ahmadi, Nafiseh Zarenejad, Alireza Rafie, Jamshid Yazadani Charati
Introduction: This in vitro study aimed at comparing the effect of agitating the final irrigant solutions of root canal by ultrasonic or using 808 nm Diode laser on the apical seal of canal. Methods and Materials: A total of 90 extracted human maxillary central incisors were prepared up to size #45 and were randomly assigned to 4 experimental groups ( n =20) and two control groups ( n =5) respectively, as follows: I ): 3 mL of 5.25% NaOCl was agitated as final irrigant solution with ultrasonic for 30 sec...
2018: Iranian Endodontic Journal
Arash Shahravan, Hedayat Gorjestani, Arash Izadi, Nazanin Mortazavi
Introduction: Endodontic files which are used to clean and shape the root canal space differ from each other regarding technical specifications. Recently, K-type files are repeatedly studied on their cutting efficiency. This study aims to evaluate the tip design and cutting efficiency of 5 brands of K-files, available in Iran dental market (naming Dentsply, Thomas, Mani, Perfect and Larmrose). Methods and Materials: In this descriptive study, topographic features of file tips were investigated by the scanning electron microscope (SEM)...
2018: Iranian Endodontic Journal
Mohammad Reza Nabavizadeh, Mahdi Sedigh-Shams, Sara Abdolrasoulnia
Introduction: This study aimed to evaluate the cyclic fatigue resistance of two single file engine-driven instruments, Reciproc and NeoNiTi, in simulated root canals. Methods and Materials: Two groups of 15 NiTi endodontic instruments with an identical tip size of 0.25 mm were tested: Reciproc R25 (group A) and NeoNiTi A1 (group B). Cyclic fatigue testing was performed in a stainless steel artificial canal. The simulated canals had a 60° angle and 5-mm radius curvature...
2018: Iranian Endodontic Journal
Ívian Verena Maia Tupinambá, Priscila Couy Corrêa Giampá, Isadora Almeida Rios Rocha, Emilena Maria Castor Xisto Lima
Purpose: To evaluate the surface roughness of bis-acrylic and acrylic resins submitted to different methods of polishing. Materials and Methods: Fifty samples of each provisional restorative material (Structur 2, Protemp 4, Duralay, and Dencrilay) were fabricated (10 mm × 2 mm) and divided into five groups ( n = 10): (1) positive control group - polyester strip; (2) negative control - unpolished; (3) abrasive tips (Exa-Technique-Edenta); (4) goat hair brush and diamond polishing paste; and (5) silicone tips (Enhance)...
April 2018: Journal of Indian Prosthodontic Society
Xuekun Lu, Shelley D Rawson, Philip J Withers
OBJECTIVES: To quantify the extent of crack-tip plasticity, crack opening displacement (COD) and crack bridging for crack growth perpendicular (HAH) and parallel (RAR) to the tubules in elephant dentin under both hydrated and dry conditions to better understand their influence on intrinsic and extrinsic toughening during crack growth. METHODS: Compact tension test-pieces were prepared from a tusk of African elephant ivory. Crack-tip strain mapping and COD measurements by digital image correlation (DIC) technique were made under incremental loading and unloading of cracks for hydrated and dry dentin of different orientations...
April 21, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Ling Peng, Jing Jing Liu, Fen Wang, Shun Feng Ge, Yuan Mao Jiang
To explore the effects of different nitrate nitrogen levels (N0 , N1 , N2 , N3 and N4 were equivalent to 0, 2.5, 5, 10, 20 mmol·L-1 15 NO3 - -N, respectively) on the growth, photosynthetic characteristics and 15 N absorption, utilization and distribution, Malus hupehensis seedlings were grown in cultural liquid Hoagland by using the 15 N-labeled tracer method. The results showed that the leaf chlorophyll content, leaf area and dry mass in different organs were the highest in N2 treatment. With the increase of 15 NO3 - -N application rates, the leaf net photosynthetic rate (Pn )significantly increased but tended to decease when the 15 NO3 - -N concentration exceeded N2 treatment...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Xiao Huan Yang, Wen Xiu Yang, Liang Liang Sun, Qian Zhao, Yong Heng Cao, Jin Hu Ma
Using suspension cultures of cucumber (Cucumis sativus) cultivar Jinyou 35, we investigated the effects of allelochemical stresses induced by Eupatorium adenophorum extracts on root border cells (RBC), and the role of exogenous NO application in alleviation of the damage of root tips exposed to E. adenophorum extracts. The results showed that, 1000 mg·L-1 E. adenophorum extracts had significant damage to the cucumber root tip, resulting in severe tissue damage, exfoliated surface cells and irregular arrangement of inner cells, while those damages could be effectively alleviated by spraying exogenous NO...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Valeria Dipasquale, Domenico Corica, Simone M C Gramaglia, Simona Valenti, Claudio Romano
AIMS: Gastrointestinal symptoms and diseases represent one of the major reasons for paediatricians' requests for specialist consultations and hospital admissions. One fourth of annual medical consultations for children younger than 6 years can be attributed to gastrointestinal symptoms. High-quality guidelines have been validated worldwide to provide clinical recommendations and support healthcare providers' practice. Nevertheless, overall compliance to standards of care is unsatisfactory, and children with gastrointestinal symptoms frequently undergo expensive, useless specialist consultations and laboratory evaluations...
April 24, 2018: International Journal of Clinical Practice
M A McAleer, I Jakasa, N Raj, C P F O'Donnell, M E Lane, A V Rawlings, R Voegeli, W H I McLean, S Kezic, A D Irvine
BACKGROUND: Filaggrin is central to the pathogenesis of atopic dermatitis (AD). The cheeks are a common initiation site of infantile AD. Regional and temporal expression of levels of filaggrin degradation products (natural moisturising factors, NMF), activities of filaggrin processing enzymes (bleomycin hydrolase; BH and calpain-1; C-1) and plasmin, and corneocyte envelope (CE) maturity in early life are largely unknown. OBJECTIVES: We did a cross-sectional, observational study investigating regional and age dependent variations in NMF levels, activity of proteases and CE maturity in stratum corneum (SC) from infants to determine if these could explain the observed predilection sites for AD in early life...
April 25, 2018: British Journal of Dermatology
József Szalma, László Vajta, Lajos Olasz, Edina Lempel
OBJECTIVES: The aim of this study was to determine the increase in heat production, preparation time, and cutting surface quality of conventional, high-speed rotating instruments and piezoelectric preparation for coronectomy procedures. MATERIALS AND METHODS: One hundred intact extracted molars were sectioned horizontally, sub-totally, 1 mm under the cemento-enamel line with five methods: (1) tungsten carbide torpedo (TcT), (2) round (TcR) drills using a conventional speed surgical straight handpiece (< 40,000 min-1 ), (3) tungsten carbide fissure (TcF), (4) diamond torpedo (DT) drills using a surgical high-speed, contra-angle handpiece (~ 120,000 min-1 ), or (5) a saw-like piezoelectric tip (PT)...
April 24, 2018: Clinical Oral Investigations
Umberto Celano, Mihaela Popovici, Karine Florent, Simone Lavizzari, Paola Favia, Kris Paulussen, Hugo Bender, Luca di Piazza, Jan Van Houdt, Wilfried Vandervorst
After the successful introduction as a replacement for the SiO2 gate dielectric in metal-oxide-semiconductor field-effect transistors, HfO2 is currently one of the most studied binary oxide systems with ubiquitous applications in nanoelectronics. For years, the interest of microelectronic downscaling has focused on tuning the dielectric constant of HfO2, particularly for monoclinic and tetragonal phases. Recently, Müller et al. showed the occurrence of ferroelectricity in orthorhombic HfO2 obtained by doping with Si, Y or Al which can alter the centrosymmetric atomic structure of the elemental binary oxide...
April 25, 2018: Nanoscale
Shoji Segami, Takaaki Tomoyama, Shingo Sakamoto, Shizuka Gunji, Mayu Fukuda, Satoru Kinoshita, Nobutaka Mitsuda, Ali Ferjani, Masayoshi Maeshima
Inorganic pyrophosphate (PPi) is a phosphate donor and energy source. Many metabolic reactions that generate PPi are suppressed by high levels of PPi. Here, we investigated how proper levels of cytosolic PPi are maintained, focusing on soluble pyrophosphatases (AtPPa1 to AtPPa5; hereafter PPa1 to PPa5) and vacuolar H+-pyrophosphatase (H+-PPase, AtVHP1/FUGU5) in Arabidopsis thaliana. In planta, five PPa isozymes tagged with GFP were detected in the cytosol and nuclei. Immunochemical analyses revealed high abundance of PPa1 and the absence of PPa3 in vegetative tissue...
April 24, 2018: Plant Cell
Satoshi Kiriyama, Ryûtarô Iwata, Midori Fukaya, Youtaro Hoshino, Yasuyuki Yamanaka
Rosalia batesi Harold (Cerambycidae) is a hardwood boring species endemic to Japan. We investigated the adult mating behavior of this species in the field and laboratory. Most males appeared on mating sites before noon, significantly earlier than females did, in field observations. The female approached and contacted the male; the male responded and started the successive mating sequence, comprising mounting, copulation, and appeasement behavior. Before the encounter, the male raised its fore and mid legs and bent the abdominal tip ventrally...
April 23, 2018: Insects
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