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https://www.readbyqxmd.com/read/28328071/investigation-of-c3-s-hydration-mechanism-by-transmission-electron-microscope-tem-with-integrated-super-x-tm-eds-system
#1
Y Sakalli, R Trettin
Tricalciumsilicate (C3 S, Alite) is the major component of the Portland cement clinker. Hydration of Alite is decisive in influencing the properties of the resulting material. This is due to its high content in cement. The mechanism of the hydration of C3 S is very complicated and not yet fully understood. There are different models describing the hydration of C3 S in various ways. In this work for a better understanding of hydration mechanism, the hydrated C3 S was investigated by using the transmission electron microscope (TEM) and for the first time, the samples for the investigations were prepared by using of focused ion beam from sintered pellets of C3 S...
March 22, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28319735/different-combinations-of-growth-factors-for-the-tenogenic-differentiation-of-bone-marrow-mesenchymal-stem-cells-in-monolayer-culture-and-in-fibrin-based-three-dimensional-constructs
#2
Marta Bottagisio, Silvia Lopa, Valentina Granata, Giuseppe Talò, Chiara Bazzocchi, Matteo Moretti, Arianna Barbara Lovati
Tendon injuries are severe burdens in clinics. The poor tendon healing is related to an ineffective response of resident cells and inadequate vascularization. Thanks to the high proliferation and multi-lineage differentiation capability, bone marrow-derived mesenchymal stem cells (BMSCs) are a promising cell source to support the tendon repair. To date, the association of various growth factors to induce the in vitro tenogenic differentiation of multipotent progenitor cells is poorly investigated. This study aimed to investigate the tenogenic differentiation of rabbit BMSCs by testing the combination of bone morphogenetic proteins (BMP-12 and 14) with transforming growth factor beta (TGF-β) and vascular endothelial growth factor (VEGF) both in 2D and 3D cultures within fibrin-based constructs...
March 16, 2017: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/28314231/sea-salt-sodium-record-from-talos-dome-east-antarctica-as-a-potential-proxy-of-the-antarctic-past-sea-ice-extent
#3
M Severi, S Becagli, L Caiazzo, V Ciardini, E Colizza, F Giardi, K Mezgec, C Scarchilli, B Stenni, E R Thomas, R Traversi, R Udisti
Antarctic sea ice has shown an increasing trend in recent decades, but with strong regional differences from one sector to another of the Southern Ocean. The Ross Sea and the Indian sectors have seen an increase in sea ice during the satellite era (1979 onwards). Here we present a record of ssNa(+) flux in the Talos Dome region during a 25-year period spanning from 1979 to 2003, showing that this marker could be used as a potential proxy for reconstructing the sea ice extent in the Ross Sea and Western Pacific Ocean at least for recent decades...
March 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28230589/effects-of-local-and-systemic-zoledronic-acid-application-on-titanium-implant-osseointegration-an-experimental-study-conducted-on-two-surface-types
#4
Serkan Dundar, Ferhan Yaman, Orhan Gecor, Omer Cakmak, Mustafa Kirtay, Tuba Talo Yildirim, Tahir Karaman, Mehmet Emre Benlidayi
The aim of this study was to evaluate the effects of local and systemic zoledronic acid (ZA) applications on titaniumoksit ceramic blasted (TiO-CB)- and sandblasted large acid-grit (SLA)-surfaced titanium implant osseointegration. Twelve New Zealand White rabbits were used in the study, divided into 6 groups: the TiO-CB (TiO-CB-CNT) (n = 2) and SLA (SLA-CNT) (n = 2) control groups in which TiO-CB- and SLA-surfaced titanium implants were surgically inserted into rabbit tibias but no treatment was applied; the TiO-CB (TiO-CB-LZA) (n = 2) and SLA (SLA-LZA) (n = 2) local ZA groups in which 1 mL of normal saline solution containing 2 mg of ZA was injected into sockets and after this the implants were integrated; and the TiO-CB (TiO-CB-SZA) (n = 2) and SLA (SLA-SZA) (n = 2) systemic ZA groups in which a single infusion of 0...
February 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28229019/is-there-a-relation-between-dental-anxiety-fear-and-general-psychological-status
#5
Tuba Talo Yildirim, Serkan Dundar, Alihan Bozoglan, Tahir Karaman, Neval Dildes, Filiz Acun Kaya, Eyyup Altintas, Faruk Oztekin, Osman Atas, Hilal Alan
BACKGROUND: Dental anxiety is a widespread problem in many populations. This problem can be a barrier to dental care and may lead to poor oral health. Dental anxiety may be related to psychological status. AIMS: The aim of the present study was to assess the levels of dental anxiety, dental fear, Beck Depression, and state-trait anxiety according to age, gender and education level in patients at the periodontology clinic in the Diyarbakır Mouth and Dental Health Center...
2017: PeerJ
https://www.readbyqxmd.com/read/28222170/biomechanical-investigation-of-two-plating-systems-for-medial-column-fusion-in-foot
#6
Paul Simons, Theresia Sommerer, Ivan Zderic, Dieter Wahl, Mark Lenz, Hristo Skulev, Matthias Knobe, Boyko Gueorguiev, R Geoff Richards, Kajetan Klos
BACKGROUND: Arthrodesis of the medial column (navicular, cuneiform I and metatarsal I) is performed for reasons such as Charcot arthropathy, arthritis, posttraumatic reconstruction or severe pes planus. However, the complication rate is still high and mainly resulting from inadequate fixation. Special plates, designed for medial column arthrodesis, seem to offer potential to reduce the complication rate. The aim of this study was to investigate biomechanically plantar and dorsomedial fusion of the medial column using two new plating systems...
2017: PloS One
https://www.readbyqxmd.com/read/27981425/-1-h-15-n-13-c-backbone-resonance-assignments-of-human-soluble-catechol-o-methyltransferase-in-complex-with-s-adenosyl-l-methionine-and-3-5-dinitrocatechol
#7
Sylwia Czarnota, Nicola J Baxter, Matthew J Cliff, Jonathan P Waltho, Nigel S Scrutton, Sam Hay
Catechol O-methyltransferase (COMT) is an enzyme that plays a major role in catechol neurotransmitter deactivation. Inhibition of COMT can increase neurotransmitter levels, which provides a means of treatment for Parkinson's disease, schizophrenia and depression. COMT exists as two isozymes: a soluble cytoplasmic form (S-COMT), expressed in the liver and kidneys and a membrane-bound form (MB-COMT), found mostly in the brain. Here we report the backbone (1)H, (15)N and (13)C chemical shift assignments of S-COMT in complex with S-adenosyl-L-methionine, 3,5-dinitrocatechol and Mg(2+)...
April 2017: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/27908492/fragility-fractures-of-the-ankle-in-the-elderly-open-reduction-and-internal-fixation-versus-tibio-talo-calcaneal-nailing-short-term-results-of-a-prospective-randomized-controlled-study
#8
D Georgiannos, V Lampridis, I Bisbinas
INTRODUCTION: The management of ankle fractures in the elderly remains unpredictable, secondary to their various co-morbidities. Although tibiotalocalcaneal (TTC) nailing has been an effective option for ankle arthrodesis due to ankle arthritis or Charcot arthropathy there are few reports regarding the use of TTC nail for the treatment of ankle fractures. PURPOSE: Aim of this study was to compare the results of ORIF versus TTC nailing for the treatment of unstable ankle fractures in the elderly...
February 2017: Injury
https://www.readbyqxmd.com/read/27823996/evaluation-of-safety-and-efficacy-of-qinming8631-dr-implantable-cardiac-pacemaker-in-chinese-patients-a-prospective-multicenter-randomized-controlled-trial-of-the-first-domestically-developed-pacemaker-of-china
#9
RANDOMIZED CONTROLLED TRIAL
Mei-Xiang Xiang, Dong-Qi Wang, Jing Xu, Zheng Zhang, Jian-Xin Hu, Dong-Mei Wang, Xiang Gu, He-Ping Liu, Tao Guo, Xiang-Jun Yang, Feng Ling, Jia-Feng Lin, Shang-Lang Cai, Guo-Bin Zhu, Jian-An Wang
BACKGROUND: High cost of imported pacemakers is a main obstacle for Chinese patients suffering from bradyarrhythmia, and a domestically developed pacemaker will help lower the burden. This study aimed to evaluate the safety and efficacy of Qinming8631 DR (Qinming Medical, Baoji, China), the first domestically developed dual-chamber pacemaker of China, compared with a commercially available pacemaker Talos DR (Biotronik, Berlin, Germany) in Chinese patients. METHODS: A prospective randomized trial was conducted at 14 centers in China...
November 20, 2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27810026/does-osteoarthritis-of-the-ankle-joint-progress-after-triple-arthrodesis-a-midterm-prospective-outcome-study
#10
Chris A M Aarts, Petra J C Heesterbeek, Perry E M Jaspers, Mark Stegeman, Jan Willem K Louwerens
BACKGROUND: Debate exists regarding the effect of triple fusion on the development of osteoarthritis (OA) of the ankle joint. The midterm outcome after triple arthrodesis and the prevalence of OA following triple arthrodesis are reported in this study. The role of alignment in the development of OA was investigated. METHODS: Seventy five patients (87 feet) were evaluated in 2003 and of these, 48 patients (55 feet) were available for second evaluation in 2008. X-rays of the ankles and feet were made prior to surgery, in 2003 and in 2008, and the level of osteoarthritis (OA) was graded with the Kellgren and Lawrence score...
December 2016: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27796800/is-pes-cavus-alignment-associated-with-lisfranc-injuries-of-the-foot
#11
Jeremy D Podolnick, Daniel S Donovan, Nicholas DeBellis, Alejandro Pino
BACKGROUND: Lisfranc (tarsometatarsal joint) injuries are relatively rare, accounting for less than 1% of all fractures, and as many as 20% of subtle Lisfranc injuries are missed at the initial patient presentation. An undiagnosed Lisfranc injury can have devastating consequences to the patient. Therefore, any factor that can raise a clinician's index of suspicion to make this diagnosis is potentially important. The cavus foot has been associated with various maladies of the lower extremity, but to our knowledge, it has not been reported to be associated with Lisfranc injury...
October 28, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27721087/selective-activation-of-lower-leg-muscles-during-maximum-voluntary-isometric-contractions
#12
Marco Hagen, Gerrit Schwiertz, Karl B Landorf, Hylton B Menz, George S Murley
The pronators and supinators play a key role in the medio-lateral stability of the ankle joint complex (i.e. talo-crural and subtalar joints). We hypothesized that each shank muscle has a specific activation pattern determined by its anatomical course around the axes of the subtalar and talo-crural joints. A secondary objective was to examine the effect of foot posture on these activation patterns. Forty-nine young adults (25 normal-arched feet, 24 flat-arched feet) performed maximum voluntary isometric contractions against manual resistance in four movement directions: plantarflexion (PF), dorsiflexion (DF), pronation (PRO) and supination (SUP)...
December 2016: Human Movement Science
https://www.readbyqxmd.com/read/27718385/tuberculosis-around-the-tarsal-navicular-a-rare-entity
#13
Vipul Vijay, Nishint Gupta, Raju Vaishya
Osteoarticular TB around the tarsal navicular is a chronic, uncommon condition affecting the midfoot, which causes significant morbidity to the patient. Tuberculosis around the tarsal navicular is rarely described in the literature. A series of three cases - two involving the talo-navicular joint and one involving the naviculo-cuneiform joint is described. Biopsy was used in all the cases for achieving diagnosis. All patients had good to fair outcome following medical management with anti-tubercular therapy...
August 2016: Foot
https://www.readbyqxmd.com/read/27714507/nmr-assignments-of-the-gacs-histidine-kinase-periplasmic-detection-domain-from-pseudomonas-aeruginosa-pao1
#14
Ahmad Ali-Ahmad, Olivier Bornet, Firas Fadel, Yves Bourne, Florence Vincent, Christophe Bordi, Françoise Guerlesquin, Corinne Sebban-Kreuzer
Pseudomonas aeruginosa is a highly adaptable opportunistic pathogen. It can infect vulnerable patients such as those with cystic fibrosis or hospitalized in intensive care units where it is responsible for both acute and chronic infection. The switch between these infections is controlled by a complex regulatory system involving the central GacS/GacA two-component system that activates the production of two small non-coding RNAs. GacS is a histidine kinase harboring one periplasmic detection domain, two inner-membrane helices and three H1/D1/H2 cytoplasmic domains...
October 6, 2016: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/27693943/synthesis-and-antiproliferative-activity-of-peracetylated-2-amino-1-2-dideoxy-1-nitro-d-glycero-l-manno-and-d-glycero-d-talo-heptitols
#15
Verónica Luque-Agudo, Ana María González Gutiérrez, Irene Lagunes, Federico López Galindo, José M Padrón, Emilio Román, José Antonio Serrano, María Victoria Gil
Michael additions between carbohydrate derived nitroalkenes and several aliphatic and aromatic amines proceeded in a stereoselective way, leading to peracetylated 2-amino-1,2-dideoxy-1-nitro-heptitols. In addition, the antiproliferative activity of some of the new adducts has been studied. The results allowed to identify lead compounds which show GI50 values in the range 1.7-19μM.
September 23, 2016: Bioorganic Chemistry
https://www.readbyqxmd.com/read/27630944/evaluating-the-relationship-of-dental-fear-with-dental-health-status-and-awareness
#16
Tuba Talo Yildirim
INTRODUCTION: Dental fear is one of the most common problems in dentistry, for both the patient and for the dentist. This issue can have an important effect on an individual's dental health. AIM: The aim of this paper was to report on the prevalence of dental anxiety and to explore if high levels of anxiety are associated with sociodemographic factors, oral health status, and level of oral health awareness. MATERIALS AND METHODS: The sample for this cross-sectional study included 294 patients (154 males and 140 females)...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27624767/nmr-study-of-met-1-human-angiogenin-1-h-13-c-15-n-backbone-and-side-chain-resonance-assignment
#17
Aikaterini C Tsika, Demetra S M Chatzileontiadou, Demetres D Leonidas, Georgios A Spyroulias
Here, we report the high yield expression and preliminary structural analysis via solution hetero-nuclear NMR spectroscopy of the recombinant Met-1 human Angiogenin. The analysis reveals a well folded as well as, a monomeric polypeptide. Τhe sequence-specific assignment of its (1)H, (15)N and (13)C resonances at high percentage was obtained. Also, using TALOS+ its secondary structure elements were determined.
October 2016: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/27600487/pedobarographic-and-radiological-analysis-after-treating-a-talus-neck-fracture
#18
Tuğba Kuru Çolak, İlker Çolak, Eren Timurtaş, Güven Bulut, M Gülden Polat
Misalignment of the talar neck after surgical repair can redistribute the load among the posterior, middle, and anterior facets of the subtalar joints, which can change the joint biomechanics, cause arthritis, and impair function. However, we found no studies analyzing the plantar pressures after treatment of talus neck fracture. We determined the dynamic plantar pedobarographic and radiographic characteristics and ankle range of motion, function, and pain among patients after surgical repair of talar neck fractures...
November 2016: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27584727/interstitial-perfusion-culture-with-specific-soluble-factors-inhibits-type-i-collagen-production-from-human-osteoarthritic-chondrocytes-in-clinical-grade-collagen-sponges
#19
Nathalie Mayer, Silvia Lopa, Giuseppe Talò, Arianna B Lovati, Marielle Pasdeloup, Stefania A Riboldi, Matteo Moretti, Frédéric Mallein-Gerin
Articular cartilage has poor healing ability and cartilage injuries often evolve to osteoarthritis. Cell-based strategies aiming to engineer cartilaginous tissue through the combination of biocompatible scaffolds and articular chondrocytes represent an alternative to standard surgical techniques. In this context, perfusion bioreactors have been introduced to enhance cellular access to oxygen and nutrients, hence overcoming the limitations of static culture and improving matrix deposition. Here, we combined an optimized cocktail of soluble factors, the BIT (BMP-2, Insulin, Thyroxin), and clinical-grade collagen sponges with a bidirectional perfusion bioreactor, namely the oscillating perfusion bioreactor (OPB), to engineer in vitro articular cartilage by human articular chondrocytes (HACs) obtained from osteoarthritic patients...
2016: PloS One
https://www.readbyqxmd.com/read/27539854/characterization-of-a-novel-d-glycero-d-talo-oct-2-ulosonic-acid-substituted-lipid-a-moiety-in-the-lipopolysaccharide-produced-by-the-acetic-acid-bacterium-acetobacter-pasteurianus-nbrc-3283
#20
Masahito Hashimoto, Mami Ozono, Maiko Furuyashiki, Risako Baba, Shuhei Hashiguchi, Yasuo Suda, Koichi Fukase, Yukari Fujimoto
Acetobacter pasteurianus is an aerobic Gram-negative rod that is used in the fermentation process used to produce the traditional Japanese black rice vinegar kurozu. Previously, we found that a hydrophobic fraction derived from kurozu stimulates Toll-like receptors to produce cytokines. LPSs, particularly LPS from A. pasteurianus, are strong candidates for the immunostimulatory component of kurozu. The LPS of A. pasteurianus remains stable in acidic conditions during the 2 years of the abovementioned fermentation process...
September 30, 2016: Journal of Biological Chemistry
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