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Hongwei Yao, Myungwoon Lee, Shu Y Liao, Mei Hong
The fusion peptide (FP) and transmembrane domain (TMD) of viral fusion proteins play important roles during virus-cell membrane fusion, by inducing membrane curvature and transient dehydration. The structure of the water-soluble ectodomain of viral fusion proteins has been extensively studied crystallographically, but the structures of the FP and TMD bound to phospholipid membranes are not well understood. We recently investigated the conformations and lipid interactions of the separate FP and TMD peptides of the parainfluenza virus 5 (PIV5) fusion protein F using solid-state NMR...
October 21, 2016: Biochemistry
Abdelaziz Boulesbaa, Kai Wang, Masoud Mahjouri-Samani, Mengkun Tian, Alexander A Puretzky, Ilia Ivanov, Christopher M Rouleau, Kai Xiao, Bobby G Sumpter, David B Geohegan
Photoinduced interfacial charge transfer is at the heart of many applications, including photovoltaics, photocatalysis, and photodetection. With the emergence of a new class of semiconductors such as monolayer two-dimensional transition metal dichalcogenides (2D-TMDs), charge transfer at the 2D/2D heterojunctions attracted several efforts due to the remarkable optical and electrical properties of 2D-TMDs. Unfortunately, in 2D/2D heterojunctions, for a given combination of two materials, the relative energy band alignment and the charge transfer efficiency are locked...
October 18, 2016: Journal of the American Chemical Society
Hohyeon Lee, Haemin Kim, Thang Phan Nguyen, Jin Ho Chang, Soo Young Kim, Hyuncheol Kim, Eunah Kang
Photoacoustic activity is the generation of an ultrasonic signal via thermal expansion or bubble formation, stimulated by laser irradiation. Photoacoustic nanoplatforms have recently gained focus for application in bio-electric interfaces. Various photoacoustic material types have been evaluated, including gold nanoparticles, semiconductive π-conjugating polymers (SP), etc. In this study, surfactant-free methoxy-polyethylene glycol-co-polypyrrole copolymer (mPEG-co-PPyr) nanoparticles (NPs) and mPEG-co-PPyr NP/molybdenum disulfide (mPEG-co-PPyr/MoS2) nanocomposites (NCs) were prepared and their photoacoustic activity was demonstrated...
October 18, 2016: ACS Applied Materials & Interfaces
Inna E Tchivileva, Richard Ohrbach, Roger B Fillingim, Joel D Greenspan, William Maixner, Gary D Slade
While cross-sectional studies have demonstrated an association between headache and temporomandibular disorder (TMD), whether headache can predict the onset of TMD is unknown. The aims of this study were to evaluate contribution of headache to the risk of developing TMD and describe patterns of change in headache types over time. An initially TMD-free cohort of 2,410 persons with low frequency of headache completed quarterly questionnaires assessing TMD and headache symptoms over a median 3.0-year follow-up period...
September 29, 2016: Pain
Paula C Jordani, Letícia B Campi, Gabriela Z Circeli, Corine Visscher, Marcelo E Bigal, Daniela A G Gonçalves
We conducted a clinical cross-sectional study to evaluate the association between obesity and the presence of painful temporomandibular disorders (TMD), controlling for age, gender, presence of migraine, depression, non-specific somatic symptoms and obstructive sleep apnea syndrome (OSAS) in an adult population METHODS: A total of 299 individuals (76.6% women) with a mean age of 36.8 ± 12.8 years were evaluated. TMD were classified using the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD)...
October 17, 2016: Journal of Oral Rehabilitation
Harry von Piekartz, Ani Pudelko, Mira Danzeisen, Toby Hall, Nikolaus Ballenberger
BACKGROUND: There is preliminary evidence of cervical musculoskeletal impairment in some temporomandibular disorder (TMD) pain states. OBJECTIVES: To determine whether people with TMD, classified as either mild or moderate/severe TMD, have more cervical signs of dysfunction than healthy subjects. DESIGN: Cross-sectional survey. METHOD: Based on the Conti Amnestic Questionnaire and examination of the temporomandibular joint (Axis I classification of the Research Diagnostic Criteria for TMD), of 144 people examined 59 were classified to a mild TMD group, 40 to a moderate/severe TMD group and 45 to an asymptomatic control group without TMD...
September 23, 2016: Manual Therapy
Fernanda Pasinato, Clarissa C Santos-Couto-Paz, Jorge Luis Lopes Zeredo, Sergio Bruzadelli Macedo, Eliane C R Corrêa
The aim of this study was to verify the effects of induced masseter-muscle pain on the amplitude of muscle activation, symmetry and coactivation of jaw- and neck-muscles during mastication. Twenty-eight male volunteers, mean age±SD 20.6±2.0years, participated in this study. Surface electromyography of the masseter and sternocleidomastoid (SCM) muscles was performed bilaterally during mastication of a gummy candy before and after injections of monosodium glutamate solution and isotonic saline solution. As a result, we observed a decrease in the amplitude of activation of the masseter muscle on the working side (p=0...
September 28, 2016: Journal of Electromyography and Kinesiology
Nitin Choudhary, Chao Li, Hee-Suk Chung, Julian Moore, Jayan Thomas, Yeonwoong Jung
Two-dimensional (2D) transition metal dichalcogenides (TMDs) have emerged as promising capacitive materials for supercapacitor devices owing to their intrinsically layered structure and large surface areas. Hierarchically integrating 2D TMDs with other functional nanomaterials have recently been pursued to improve electrochemical performances; however, it often suffers from limited cyclic stabilities and capacitance losses due to the poor structural integrity at the interfaces of randomly assembled materials...
October 12, 2016: ACS Nano
J Durham, M Al-Baghdadi, L Baad-Hansen, M Breckons, J P Goulet, F Lobbezoo, T List, A Michelotti, Nixdorf, C C Peck, K Raphael, E Schiffman, J G Steele, W Story, R Ohrbach
Self-management (SM) programmes are commonly used for initial treatment of patients with temporomandibular disorders (TMD). The programmes described in the literature, however, vary widely with no consistency in terminology used, components of care, or their definitions. The aims of this study were, therefore, to: construct an operationalized definition of self-management appropriate for the treatment of patients with TMD; identify the components of that self-management currently being used; create sufficiently clear and non-overlapping standardized definitions for each of those components...
October 11, 2016: Journal of Oral Rehabilitation
Min Su Kim, Shrawan Roy, Jubok Lee, Byung Gu Kim, Hyun Kim, Ji-Hoon Park, Seok Joon Yun, Gang Hee Han, Jae-Young Leem, Jeongyong Kim
Monolayer transition metal dichalcogenides (1L-TMDs) are atomically thin direct band gap semiconductors, from which the emission of light is determined by optical transitions of exciton complexes such as neutral excitons and trions. While the quantum yields of 1L-TMDs are quite low, the ability to control the populations of exciton complexes in 1L-TMDs through various doping processes is an interesting advantage, and provides ample possibilities for engineering the optical properties of these semiconductor monolayers...
October 10, 2016: ACS Applied Materials & Interfaces
Ali Yilmaz, Melike Akçaalan
BACKGROUND: Clinical detection of anatomic narrowing of the upper airway may faciliate early recognition of obstructive sleep apnea (OSA). The aim of this study was to investigate whether anthropometric measurement can be used to predict OSA. MATERIALS AND METHODS: 147 subject were included from those who were referred patients for suspected sleep apnea to our sleep laboratory. All patients were divided 2 groups with respect to the apnea-hypopnea index. The first group was diagnosed as OSA, AHI greater than 5...
October 7, 2016: Folia Morphologica (Warsz)
Cai Cheng, Jia-Tao Sun, Xiang-Rong Chen, Hui-Xia Fu, Sheng Meng
Single-layer transition-metal dichalcogenides (TMDs) such as MoS2 and MoSe2 exhibit unique electronic band structures ideal for hosting many exotic spin-orbital orderings. It has been widely accepted that Rashba spin splitting (RSS) is linearly proportional to the external field in heterostructure interfaces or to the potential gradient in polar materials. Surprisingly, an extraordinary nonlinear dependence of RSS is found in semiconducting TMD monolayers under a gate field. In contrast to small and constant RSS in polar materials, the potential gradient in non-polar TMDs gradually increases with the gate bias, resulting in nonlinear RSS with a Rashba coefficient an order-of-magnitude larger than the linear one...
October 6, 2016: Nanoscale
Zhigang Chen, Zhengxu Tao, Shan Cong, Junyu Hou, Dengsong Zhang, Fengxia Geng, Zhigang Zhao
A simple, general and fast method called "electrochemical shock" is developed to prepare monolayered transition-metal dichalcogenide (TMD) QDs with an average size of 2-4 nm and an average thickness of 0.85 ± 0.5 nm with only about 10 min of ultrasonication. Just like nails hammered into a plate, the electrochemical shock with Al(3+) ions and the following extraction with the help of oleic acid can disintegrate bulk TMD crystals into ultrafine TMD QDs. The fast-prepared QDs are then applied to detect highly explosive molecules such as 2,4,6-trinitrophenol (TNP) with a low detection limit of 10(-6) M...
September 15, 2016: Chemical Communications: Chem Comm
Defne Yalçın Yeler, Nurbengu Yılmaz, Melike Koraltan, Ezgi Aydın
OBJECTIVE: To evaluate whether there is a relationship between possible sleep bruxism (PSB), temporomandibular disorders (TMD), unilateral chewing (UC), and occlusal factors in university students recruited from Cumhuriyet University in Turkey. METHODS: For this cross-sectional survey, 519 (223 males, mean age 21.57 ± 2.3 years, 296 females, mean age 21.02 ± 2 years) university students who admitted to the Department of Oral and Maxillofacial Radiology of the Faculty of Dentistry, Cumhuriyet University for dental care between 2012 and 2014 were selected randomly...
October 6, 2016: Cranio: the Journal of Craniomandibular Practice
Ashkan Aryaei, Natalia Vapniarsky, Jerry C Hu, Kyriacos A Athanasiou
Temporomandibular disorders (TMDs) are among the most common maxillofacial complaints and a major cause of orofacial pain. Although current treatments provide short- and long-term relief, alternative tissue engineering solutions are in great demand. Particularly, the development of strategies, providing long-term resolution of TMD to help patients regain normal function, is a high priority. An absolute prerequisite of tissue engineering is to understand normal structure and function. The current knowledge of anatomical, mechanical, and biochemical characteristics of the temporomandibular joint (TMJ) and associated tissues will be discussed, followed by a brief description of current TMD treatments...
October 4, 2016: Current Osteoporosis Reports
Paloma María Blasco-Bonora, Aitor Martín-Pintado-Zugasti
OBJECTIVES: To investigate the effects of deep dry needling (DN) of myofascial trigger points (MTrPs) of the masseter and temporalis on pain, pressure pain threshold (PPT), pain-free maximal jaw opening and temporomandibular disorder (TMD)-related disability in patients with sleep bruxism (SB) and myofascial TMD. METHODS: Seventeen subjects (11 women, 6 men) aged 39±13 years (range 23-66) diagnosed with SB and myofascial TMD were invited to participate in this prospective case series study...
October 3, 2016: Acupuncture in Medicine: Journal of the British Medical Acupuncture Society
Xianan Xie, Hui Lin, Xiaowei Peng, Congrui Xu, Zhongfeng Sun, Kexin Jiang, Antian Huang, Xiaohui Wu, Nianwu Tang, Alessandra Salvioli, Paola Bonfante, Bin Zhao
The majority of terrestrial vascular plants are capable of forming mutualistic associations with obligate biotrophic arbuscular mycorrhizal (AM) fungi from the phylum Glomeromycota. This mutualistic symbiosis provides the fungus with fixed carbohydrates, and reciprocally improves plant phosphate (Pi) uptake. AM fungal transporters can acquire Pi from the soil through the hyphal networks. Nevertheless, the precise functions of AM fungal Pi transporters, and whether they act as sensors, apart from as nutrient transporters, in fungal signal transduction remain unclear...
September 26, 2016: Molecular Plant
Marcin Berger, Leszek Szalewski, Jacek Szkutnik, Michał Ginszt, Apolinary Ginszt
INTRODUCTION: A growing body of evidence suggests that bruxism exists in two separate manifestations. However, little is known about the association between specific manifestations of bruxism and temporomandibular disorder (TMD) pain. AIM: The aim of our study was to analyze the association between TMD pain and specific diagnoses of bruxism (sleep, awake, and mixed diagnosis of sleep and awake bruxism). MATERIAL AND METHODS: 508 adult patients (296 women and 212 men), aged between 18 and 64 years (mean age 34±12 years), attending to a clinic for general dental treatment...
September 16, 2016: Neurologia i Neurochirurgia Polska
Yuanju Qu, Hui Pan, Chi Tat Kwok
Two-dimensional (2D) transition metal dichalcogenides (TMDs) have been widely used from nanodevices to energy harvesting/storage because of their tunable physical and chemical properties. In this work, we systematically investigate the effects of hydrogenation on the structural, electronic, magnetic, and catalytic properties of 33 TMDs based on first-principles calculations. We find that the stable phases of TMD monolayers can transit from 1T to 2H phase or vice versa upon the hydrogenation. We show that the hydrogenation can switch their magnetic and electronic states accompanying with the phase transition...
September 30, 2016: Scientific Reports
Alp Saruhanoğlu, Bilge Gökçen-Röhlig, Ceren Saruhanoğlu, Değer Öngül, Meltem Koray
OBJECTIVE: The current study aimed to investigate the frequency of signs and symptoms of temporomandibular disorders (TMD) among call center employees. METHODS: Workers from four call centers (CC) were invited to participate in this study. The examination was based on the Research Diagnostic Criteria for Temporomandibular Disorder (RDC/TMD). The tenderness of the masticator muscles was assessed on both sides by bilateral palpation. The mobility of the mandible was measured with a plastic millimeter ruler on opening, lateral excursions, and protrusion...
August 16, 2016: Cranio: the Journal of Craniomandibular Practice
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