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Rafael Monge-Rojas, Tamara Fuster-Baraona, Carlos Garita-Arce, Marta Sánchez-López, Uriyoán Colon-Ramos, Vanessa Smith-Castro
BACKGROUND: In Latin America, more than 80% of adolescent girls are physically inactive. Inactivity may be reinforced by female stereotypes and objectification in the Latin American sociocultural context. METHODS: We examined the influence of objectification on the adoption of an active lifestyle among 192 adolescents (14 -17 y/old) from urban and rural areas in Costa Rica. Analyses of 48 focus-groups sessions were grounded in Objectification Theory. RESULTS: Vigorous exercises were gender-typed as masculine while girls had to maintain an aesthetic appearance at all times...
October 24, 2016: Journal of Physical Activity & Health
Amjad Al Taki, Mohammed Khalesi, Muftah Shagmani, Islam Yahia, Fatma Al Kaddah
Objective. The current investigation was proposed to determine the impression of trained dental professionals and laypeople towards the modified smile esthetics. Materials and Methods. Twenty-six images were randomized in a survey and graded according to attractiveness by the orthodontists, general dentists, and laypeople. Photographs of gingival display, midline diastema, central incisor crown length, and lateral incisor crown width were manipulated with five minor changes in each. For smile arc and buccal corridor, two major changes were incorporated besides the ideal photograph...
2016: International Journal of Dentistry
Fenix W D Huang, Christian M Reidys
: In this paper we introduce a novel, context-free grammar, RNAFeatures(*), capable of generating any RNA structure including pseudoknot structures (pk-structure). We represent pk-structures as orientable fatgraphs, which naturally leads to a filtration by their topological genus. Within this framework, RNA secondary structures correspond to pk-structures of genus zero. RNAFeatures(*) acts on formal, arc-labeled RNA secondary structures, called λ-structures. λ-structures correspond one-to-one to pk-structures together with some additional information...
October 20, 2016: Mathematical Biosciences
Eliza Pelrine, Sara Diana Pasik, Leyla Bayat, Debora Goldschmiedt, Elizabeth P Bauer
Selective serotonin reuptake inhibitors (SSRIs) are widely prescribed to treat anxiety and depression, yet they paradoxically increase anxiety during initial treatment. Acute administration of these drugs prior to learning can also enhance Pavlovian cued fear conditioning. This potentiation has been previously reported to depend upon the bed nucleus of the stria terminalis (BNST). Here, using temporary inactivation, we confirmed that the BNST is not necessary for the acquisition of cued or contextual fear memory...
October 20, 2016: Neurobiology of Learning and Memory
Sujan K Sarkar, Onyinye Osisioma, William L Karney, Manabu Abe, Anna D Gudmundsdottir
Photolysis of 3-azido-1-indenone (1) with a light-emitting diode (LED, λ= 405 nm) or mercury arc lamp (Pyrex) resulted in the formation of heterodimer 3 in excellent yield, through dimerization of triplet vinylnitrene (3)2. At ambient temperature, vinylnitrene (3)2 (λmax at 340 and 480 nm) was detected directly with laser flash photolysis of vinyl azide 1. The vinylnitrene intermediate was also characterized directly with IR and ESR spectroscopy in cryogenic matrices. The ESR spectrum of vinylnitrene (3)2 yielded a zero-field splitting parameter |D/hc| of 0...
October 22, 2016: Journal of the American Chemical Society
Gaoqiang Xu, Xinkun Shen, Liangliang Dai, Qichun Ran, Pingping Ma, Kaiyong Cai
Bacterial infection is one of the most severe postoperative complications leading to implantation failure. The early bacterial stage (4-6h) was proved to be the "decisive period" for long-term bacteria-related infection. Thus, to endow potential early antibacterial capacity for a titanium (Ti) based implant, an effective antiseptic agent of octenidine dihydrochloride (OCT) was effectively loaded on the mesoporous silica nanoparticles (MSNs)-incorporated titania coating which was fabricated by an electrophoretic-enhanced micro-arc oxidation technique...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Muhammad Shoaib Butt, Jing Bai, Xiaofeng Wan, Chenglin Chu, Feng Xue, Hongyan Ding, Guanghong Zhou
Full biodegradable magnesium alloy (AZ31) strengthened poly-lactic acid (PLA) composite rods for potential application for bone fracture fixation were prepared by plastic injection process in this work. Their surface/interfacial morphologies, mechanical properties and vitro degradation were studied. In comparison with untreated Mg rod, porous MgO ceramic coating on Mg surface formed by Anodizing (AO) and micro-arc-oxidation (MAO)treatment can significantly improve the interfacial binding between outer PLA cladding and inner Mg rod due to the micro-anchoring action, leading to better mechanical properties and degradation performance of the composite rods...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Jeong-Eun Rah, Gwe-Ya Kim, Do Hoon Oh, Tae Hyun Kim, Jong Won Kim, Dae Yong Kim, Sung Yong Park, Dongho Shin
BACKGROUND: The purpose of this study is to evaluate the dosimetric benefits of a proton arc technique for treating tumors of the para-aortic lymph nodes (PALN). METHOD: In nine patients, a proton arc therapy (PAT) technique was compared with intensity modulated radiation therapy (IMRT) and proton beam therapy (PBT) techniques with respect to the planning target volume (PTV) and organs at risk (OAR). PTV coverage, conformity index (CI), homogeneity index (HI) and OAR doses were compared...
October 21, 2016: Radiation Oncology
Alexander Mook, Jürgen Henk, Ingrid Mertig
The dispersion relations of magnons in ferromagnetic pyrochlores with Dzyaloshinskii-Moriya interaction are shown to possess Weyl points, i. e., pairs of topologically nontrivial crossings of two magnon branches with opposite topological charge. As a consequence of their topological nature, their projections onto a surface are connected by magnon arcs, thereby resembling closely Fermi arcs of electronic Weyl semimetals. On top of this, the positions of the Weyl points in reciprocal space can be tuned widely by an external magnetic field: rotated within the surface plane, the Weyl points and magnon arcs are rotated as well; tilting the magnetic field out of plane shifts the Weyl points toward the center Γ[over ¯] of the surface Brillouin zone...
October 7, 2016: Physical Review Letters
Erlin Zhang, Jing Ren, Shengyi Li, Lei Yang, Gaowu Qin
Ti-Cu sintered alloys have shown good antibacterial abilities. However, the sintered method (powder metallurgy) is not convenient to produce devices with a complex structure. In this paper, Ti-Cu alloys with 2.0, 3.0 and 4.0 wt.% Cu were prepared in an arc melting furnace and subjected to different heat treatments: solid solution and ageing, to explore the possibility of preparing an antibacterial Ti-Cu alloy by a casting method and to examine the effect of Cu content. Phase identification was conducted on an XRD diffraction meter, and the microstructure was observed by a metallographic microscope, a scanning electron microscope (SEM) with energy disperse spectroscopy (EDS) and transmission electron microscopy (TEM)...
October 21, 2016: Biomedical Materials
Hiroko Makita, Emiko Tanaka, Satoshi Mitsunobu, Masayuki Miyazaki, Takuro Nunoura, Katsuyuki Uematsu, Yoshihiro Takaki, Shinro Nishi, Shigeru Shimamura, Ken Takai
A novel iron-oxidizing chemolithoautotrophic bacterium, strain ET2(T), was isolated from a deep-sea sediment in a hydrothermal field of the Bayonnaise knoll of the Izu-Ogasawara arc. Cells were bean-shaped, curved short rods. Growth was observed at a temperature range of 15-30 °C (optimum 25 °C, doubling time 24 h) and a pH range of 5.8-7.0 (optimum pH 6.4) in the presence of NaCl at a range of 1.0-4.0 % (optimum 2.75 %). The isolate was a microaerophilic, strict chemolithoautotroph capable of growing using ferrous iron and molecular oxygen (O2) as the sole electron donor and acceptor, respectively; carbon dioxide as the sole carbon source; and either ammonium or nitrate as the sole nitrogen source...
October 20, 2016: Archives of Microbiology
Kemal Ekici, Eda K Pepele, Bahaddin Yaprak, Oztun Temelli, Aysun F Eraslan, Nadir Kucuk, Ayse Y Altınok, Pelin A Sut, Ozlem D Alpak, Cemil Colak, Alpaslan Mayadagli
Various radiotherapy planning methods for T1N0 laryngeal cancer have been proposed to decrease normal tissue toxicity. We compare helical tomotherapy (HT), linac-based intensity-modulated radiation therapy (IMRT), volumetric-modulated arc therapy (VMAT), and 3-D conformal radiotherapy (3D-CRT) techniques for T1N0 laryngeal cancer. Overall, 10 patients with T1N0 laryngeal cancer were selected and evaluated. Furthermore, 10 radiotherapy treatment plans have been created for all 10 patients, including HT, IMRT, VMAT, and 3D-CRT...
October 17, 2016: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
Omid Jazaeri, Gregory Magee, Michal Schaefer, Ross Volpe, Adam Rocker, Ryan Arce, Kendall S Hunter
No abstract text is available yet for this article.
August 2016: Journal of Vascular Surgery
M Dolera, L Malfassi, S Pavesi, S Finesso, M Sala, N Carrara, S Marcarini, G Mazza, C Bianchi, G Urso
OBJECTIVES: To evaluate the feasibility and efficacy of hypofractionated stereotactic volumetric-modulated arc radiotherapy in treating canine adrenal tumours with vascular invasion. METHODS: A single-arm clinical study was performed. The dogs underwent total body computed tomography, brain and abdomen magnetic resonance imaging and endocrine assay. Adrenal masses were classified as cortisol-secreting adrenal tumour or non-secreting adrenal tumour. Radiotherapy treatments were delivered by hypofractionated stereotactic volumetric-modulated arc radiotherapy via a linear accelerator...
October 19, 2016: Journal of Small Animal Practice
Joan Montaner, Alejandro Bustamante, Silvia García-Matas, Maite Martínez-Zabaleta, Carmen Jiménez, Javier de la Torre, Francisco R Rubio, Tomás Segura, Jaime Masjuán, David Cánovas, Mar Freijo, Raquel Delgado-Mederos, Javier Tejada, Aida Lago, Yolanda Bravo, Natália Corbeto, Dolors Giralt, Bárbara Vives-Pastor, Anna de Arce, Francisco Moniche, Pilar Delgado, Marc Ribó
BACKGROUND AND PURPOSE: The STARS trial (Stroke Treatment With Acute Reperfusion and Simvastatin) was conducted to demonstrate the efficacy and safety of simvastatin treatment in acute stroke. METHODS: STARS07 was a multicentre, phase IV, prospective, randomized, double-blind, placebo-controlled trial. Patients with Acute ischemic stroke recruited within 12 hours from symptom onset were randomized to oral simvastatin 40 mg or placebo, once daily for 90 days. Primary outcome was proportion of independent patients (modified Rankin Scale score of ≤2) at 90 days...
October 6, 2016: Stroke; a Journal of Cerebral Circulation
Laure Vieillevigne, Sandra Bessieres, Monia Ouali, Christel Lanaspeze
PURPOSE: Flattening filter free (FFF) beams are frequently used for stereotactic body radiation therapy with various treatment modalities: conventional static fields, dynamic conformal arc (DCA) or Rapid Arc (RA). The goal of this study was to obtain some criteria to enable a conscious choice of the employment of FFF beams and of the DCA or RA technique, depending on the PTV size. METHODS AND MATERIALS: 24 PTVs from 1.52cm(3) to 445.24cm(3) were studied in various sites: virtual phantom, lung and liver...
October 15, 2016: Physica Medica: PM
Chrysanthi Fergani, Victor Navarro
Reproductive function is driven by the hormonal interplay between the gonads and brain-pituitary axis. Gonadotropin-releasing hormone (GnRH) is released in a pulsatile manner, which is critical for the attainment and maintenance of fertility, however, GnRH neurons lack the ability to directly respond to most regulatory factors, and a hierarchical upstream neuronal network governs its secretion. We and others proposed a model in which Kiss1 neurons in the arcuate nucleus (ARC), so called KNDy neurons, release kisspeptin (a potent GnRH secretagogue) in a pulsatile manner to drive GnRH pulses under the coordinated autosynaptic action of its cotransmitters, the tachykinin neurokinin B (NKB, stimulatory) and dynorphin (inhibitory)...
October 17, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
Joon Kyungjoon Lim, Benjie Barzel, Sandra Burke
OBJECTIVE: Hypertension affects one third of the population around the world and is a major contributor to cardiovascular disease. There is strong evidence that the main cause of hypertension is increases sympathetic nerve activity to specific organs. Plasma leptin levels correlate with blood pressure (BP) and renal sympathetic nerve activity (RSNA). The central effects of leptin are mediated primarily through the arcuate (ARC) nucleus of the hypothalamus. Both neuropeptide-Y (NPY) and alpha-melanocyte stimulating hormone (α-MSH) containing neurons ascend from the ARC and terminate in ventromedial hypothalamus (VMH) which are the key centres of energy homeostasis, hemodynamics and sympathetic tone to renal vasculature...
September 2016: Journal of Hypertension
Anastasia Mihailidou, Anthony Ashton
OBJECTIVE: Myocardial infarction (MI) continues to be a major burden of disease, despite rapid reperfusion interventions. Reperfusion of ischemic hearts (reperfusion injury) induces free radical generation, activation of early stress responses and apoptosis, which contributes to ventricular remodeling and dysfunction, which may lead to developing heart failure. Mineralocorticoid receptor (MR) antagonists have been shown clinically to reduce blood pressure, particularly in resistant hypertension, and substantially increase survival in heart failure...
September 2016: Journal of Hypertension
Eugene T H Ek, Sophia K Paul, Robert N Hotchkiss
BACKGROUND: The role of elbow contracture release in the very young is unclear, with existing studies reporting conflicting results. This study evaluated the long-term results after open elbow contracture release in patients aged younger than 18 years. METHODS: Between 1994 and 2012, 32 patients underwent open elbow contracture release at a mean age of 13.8 years (range, 5-18 years), and their outcomes were reviewed. The primary cause was traumatic in 30 patients (4 radial head/neck fractures, 5 intra-articular distal humeral fractures, 11 extra-articular distal humeral fractures, 10 complex fracture-dislocations), and the mean time from the index injury to contracture release was 16...
October 14, 2016: Journal of Shoulder and Elbow Surgery
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