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https://www.readbyqxmd.com/read/29904145/on-the-thermal-shock-resistance-and-mechanical-properties-of-novel-unidirectional-uhtcmcs-for-extreme-environments
#1
Luca Zoli, Antonio Vinci, Pietro Galizia, Cesare Melandri, Diletta Sciti
Aerospace provides a strong driving force for technological development. Recently a novel class of composites for harsh environments, based on ultra-high temperature ceramic composites reinforced with continuous fibers (UHTCMC), is being developed. The goal of this work is to overcome the current data patchwork about their microstructural optimization and structural behavior, by showing a consistent mechanical characterization of well-defined and developed UHTCMCs based on ZrB2 -matrix. The obtained composites have a density of 3...
June 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29895974/multimodality-cellular-and-molecular-imaging-of-concomitant-tumour-enhancement-in-a-syngeneic-mouse-model-of-breast-cancer-metastasis
#2
Katie M Parkins, Veronica P Dubois, Amanda M Hamilton, Ashley V Makela, John A Ronald, Paula J Foster
The mechanisms that influence metastatic growth rates are poorly understood. One mechanism of interest known as concomitant tumour resistance (CTR) can be defined as the inhibition of metastasis by existing tumour mass. Conversely, the presence of a primary tumour has also been shown to increase metastatic outgrowth, termed concomitant tumour enhancement (CTE). The majority of studies evaluating CTR/CTE in preclinical models have relied on endpoint histological evaluation of tumour burden. The goal of this research was to use conventional magnetic resonance imaging (MRI), cellular MRI, and bioluminescence imaging to study the impact of a primary tumour on the development of brain metastases in a syngeneic mouse model...
June 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29893950/clinically-significant-small-bowel-crohn-s-disease-might-only-be-detected-by-capsule-endoscopy
#3
Dario Sorrentino, Vu Q Nguyen
Background: In Crohn's disease (CD) a small bowel study-in addition to colonoscopy-is considered necessary for diagnosis/staging. In this study we re-examined the role of capsule endoscopy (CE), colonoscopy, imaging tests [magnetic resonance enterography/computed tomographic enterography (MRE/CTE)], and inflammatory markers [fecal lactoferrin and C-reactive protein (FL/CRP)] in CD patients who had undergone intestinal resection and in those who never had surgery. Methods: In this retrospective study 43 consecutive patients underwent CE because of staging/symptoms unexplained by colonoscopy/imaging...
June 8, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29889065/involvement-of-activation-of-asparaginyl-endopeptidase-in-tau-hyperphosphorylation-in-repetitive-mild-traumatic-brain-injury
#4
Wen Hu, Yunn Chyn Tung, Yanchong Zhang, Fei Liu, Khalid Iqbal
Traumatic brain injury (TBI) is an established risk factor for the development of neurodegeneration and dementia late in life. Repetitive mild TBI (r-mTBI) is directly associated with chronic traumatic encephalopathy (CTE), a progressive neurodegenerative disorder characterized by focal perivascular to widespread Alzheimer-type neurofibrillary pathology of hyperphosphorylated tau. Studies in animal models have shown hyperphosphorylation of tau after TBI. However, the molecular mechanisms by which TBI leads to tau pathology are not understood...
June 4, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29862562/unexpected-link-between-insect-innexins-and-apoptosis-of-hela-cells
#5
Wei Zhang, Meng-Wei Liu, Ming Li, Wei Xiao, Xue-Wen Zhang, Hao-Juan He, Ya-Bin Chen, Lei Ding, Kai-Jun Luo
Little is known about how mammalian cells respond to the expression of innexins (Inxs), which are known to mediate cell-to-cell communication that causes apoptosis in the cells of the insect Spodoptera litura. The mammalian expression system, p3xFLAG tag protein, containing the CMV promoter, allowed us to construct two C-terminally elongated innexins (Cte-Inxs), SpliInx2 (Inx2-FLAG), and SpliInx3 (Inx3-FLAG), which were predicted to have the same secondary topological structures as the native SpliInx2 and SpliInx3...
June 3, 2018: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29793794/biaxial-flexural-strength-of-the-bilayered-disk-composed-of-ceria-stabilized-zirconia-alumina-nanocomposite-ce-tzp-a-and-veneering-porcelain
#6
Tomofumi Sawada, Christine Schille, Verena Wagner, Sebastian Spintzyk, Ernst Schweizer, Jürgen Geis-Gerstorfer
OBJECTIVE: Herein we investigated the flexural strengths of bilayered ceria-stabilized zirconia/alumina nanocomposite (Ce-TZP/A) disks using different veneering porcelains. METHODS: Commercial (VITA VM9, Cercon Ceram Kiss, and IPS e.max Ceram) and experimental porcelains (Vintage ZR with coefficient of thermal expansions: CTEs of 8.45, 9.04, and 9.61ppm/°C) with various layer thicknesses (1.0, 1.5, and 2.0mm) were applied to Ce-TZP/A disks (0.8mm thickness, n=180)...
May 21, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29790412/career-and-technical-education-inclusion-and-postsecondary-outcomes-for-students-with-learning-disabilities
#7
Roddy J Theobald, Dan D Goldhaber, Trevor M Gratz, Kristian L Holden
We used longitudinal data from Washington State to investigate the relationships among career and technical education (CTE) enrollment, inclusion in general education, and high school and postsecondary outcomes for students with learning disabilities. We replicated earlier findings that students with learning disabilities who were enrolled in a "concentration" of CTE courses had higher rates of employment after graduation than observably similar students with learning disabilities who were enrolled in fewer CTE courses...
May 1, 2018: Journal of Learning Disabilities
https://www.readbyqxmd.com/read/29788055/clinical-benefit-of-capsule-endoscopy-in-crohn-s-disease-impact-on-patient-management-and-prevalence-of-proximal-small-bowel-involvement
#8
Stephanie L Hansel, Jeffrey D McCurdy, John M Barlow, Jeff Fidler, Joel G Fletcher, Brenda Becker, Nayantara Coelho Prabhu, William A Faubion, Karen A Hanson, Sunanda V Kane, John B Kisiel, Edward V Loftus, Konstantinos A Papadakis, Darrell S Pardi, Laura E Raffals, Shayla Schoenoff, William J Tremaine, David H Bruining
Background: Ileocolonoscopy and computed tomography (CT) or magnetic resonance (MR) enterography (CTE/MRE) are utilized to evaluate patients with small bowel (SB) Crohn's disease (CD). The purpose of our study was to estimate the impact of capsule endoscopy (CE) on patient management after clinical assessment, ileocolonoscopy, and CTE/MRE. Methods: We prospectively analyzed 50 adult CD patients without strictures at clinically indicated ileocolonoscopy and CTE/MRE exams...
May 17, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29779184/limbic-system-structure-volumes-and-associated-neurocognitive-functioning-in-former-nfl-players
#9
Christian Lepage, Marc Muehlmann, Yorghos Tripodis, Jakob Hufschmidt, Julie Stamm, Katie Green, Pawel Wrobel, Vivian Schultz, Isabelle Weir, Michael L Alosco, Christine M Baugh, Nathan G Fritts, Brett M Martin, Christine Chaisson, Michael J Coleman, Alexander P Lin, Ofer Pasternak, Nikos Makris, Robert A Stern, Martha E Shenton, Inga K Koerte
Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease associated with exposure to repetitive head impacts. CTE has been linked to disruptions in cognition, mood, and behavior. Unfortunately, the diagnosis of CTE can only be made post-mortem. Neuropathological evidence suggests limbic structures may provide an opportunity to characterize CTE in the living. Using 3 T magnetic resonance imaging, we compared select limbic brain regional volumes - the amygdala, hippocampus, and cingulate gyrus - between symptomatic former National Football League (NFL) players (n = 86) and controls (n = 22)...
May 19, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29774652/nonscarring-diffuse-hair-loss-in-women-a-clinico-etiological-study-from-tertiary-care-center-in-north-west-india
#10
Kavita Poonia, Gurvinder Pal Thami, Mala Bhalla, Shivani Jaiswal, Jasleen Sandhu
BACKGROUND: Diffuse hair loss (DHL) is a common problem in adult women and has a major impact on quality of life. Ascertaining the etiological diagnosis is a challenging task in such patients. Satisfactory treatment can only be instituted after ascertaining the cause of hair loss. OBJECTIVE: To study the clinico-epidemiological profile of nonscarring DHL in females and to ascertain its underlying etiological factors. STUDY DESIGN: Of a total of 110 females, who presented with nonscarring DHL to the outpatient dermatology department, 100 qualified for inclusion in the study...
May 17, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29768816/preparation-of-ultraviolet-curing-type-silicone-rubbers-containing-mesoporous-silica-fillers
#11
Nawfel Abdullah, Md Shahriar A Hossain, Amanullah Fatehmulla, Wazirzada Aslam Farooq, Md Tofazzal Islam, Nobuyoshi Miyamoto, Yoshio Bando, Yuichiro Kamachi, Victor Malgras, Yusuke Yamauchi, Norihiro Suzuki
Here we have been focusing on mesoporous silica (MPS) as inorganic filler material to improve the mechanical strength of silicone rubbers. The MPS particles are more effective in reducing the coefficient of thermal expansion (CTE) and hardening silicone rubber composites when compared to commercially available nonporous silica particles. In this study, we utilize ultraviolet curing type silicone rubbers and prepare MPS composites according to a simple single-step method. From an industrial viewpoint, simplifying the fabrication processes is critical...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29760785/monitoring-crohn-s-disease-activity-endoscopy-fecal-markers-and-computed-tomography-enterography
#12
Susana Lopes, Patrícia Andrade, Joana Afonso, Rui Cunha, Eduardo Rodrigues Pinto, Isabel Ramos, Guilherme Macedo, Fernando Magro
Background: The treatment goal of Crohn's disease (CD) has moved towards achieving mucosal healing, resolution of transmural inflammation, and normalization of biomarkers. The purpose of this study was to evaluate how well computed tomography enterography (CTE) and fecal calprotectin (FC) correlated with endoscopic activity in newly diagnosed patients with CD and after 1 year of therapy. Methods: Consecutive patients with newly diagnosed CD were evaluated by endoscopy, CTE, and FC at diagnosis and 12 months after beginning immunosuppression...
2018: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/29749074/colossal-negative-thermal-expansion-in-electron-doped-pbvo3-perovskites
#13
Hajime Yamamoto, Takashi Imai, Yuki Sakai, Masaki Azuma
Colossal negative thermal expansion (NTE) with a volume contraction of about 8%, the largest value reported so far for NTE materials, was observed in an electron-doped giant tetragonal perovskite compound Pb1-xBixVO3 (x = 0.2 and 0.3). A polar tetragonal (P4mm) to non-polar cubic structural transition took place upon heating. The coefficient of thermal expansion (CTE) and the working temperature could be tuned by changing the Bi content, and La substitution decreased the transition temperature to room temperature...
May 11, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29731706/phosphorylation-of-threonine-175-tau-in-the-induction-of-tau-pathology-in-amyotrophic-lateral-sclerosis-frontotemporal-spectrum-disorder-als-ftsd-a-review
#14
REVIEW
Alexander J Moszczynski, Matthew A Hintermayer, Michael J Strong
Approximately 50-60% of all patients with amyotrophic lateral sclerosis (ALS) will develop a deficit of frontotemporal function, ranging from frontotemporal dementia (FTD) to one or more deficits of neuropsychological, speech or language function which are collectively known as the frontotemporal spectrum disorders of ALS (ALS-FTSD). While the neuropathology underlying these disorders is most consistent with a widespread alteration in the metabolism of transactive response DNA-binding protein 43 (TDP-43), in both ALS with cognitive impairment (ALSci) and ALS with FTD (ALS-FTD; also known as MND-FTD) there is evidence for alterations in the metabolism of the microtubule associated protein tau...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29721230/role-of-coefficient-of-thermal-expansion-on-bond-strength-of-ceramic-veneered-yttrium-stabilized-zirconia
#15
Niwut Juntavee, Chollada Dangsuwan
Background: Incompatible coefficient of thermal expansion (CTE) is supposed to be a reason for chipping of ceramic veneered zirconia. This study evaluates the effect of veneering ceramic at varied CTE on bond strength to zirconia. Material and Methods: Zirconia disks (Z, Ø 10 mm, 1.0 mm thickness) were prepared from Y-TZP (Cercon®) and sintered at 1350°C for 6 hours. All zirconia disks were veneered with ceramics ((Ø 7.0 mm, 1.5 mm thickness) with varied CTE including VITADur® alpha (VDα), VITAVM®7 (VM7), VITAVM®9 (VM9), Cercon® ceramkiss (CCK), IPSe...
March 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29719722/an-aggravated-return-to-work-case-of-organic-solvent-induced-chronic-toxic-encephalopathy
#16
Sangyun Seo, Jungwon Kim
Background: Organic solvent-induced chronic toxic encephalopathy (CTE) is known as a non-progressive disorder that does not progress after diagnosis. The authors present a case those symptoms worsened after continued exposure to organic solvent after returning to work. Because such a case has not been reported in South Korea to the best of our knowledge, we intend to report this case along with literature review. Case presentation: A 59-year-old man, who performed painting job at a large shipyard for 20 years, was receiving hospital treatment mainly for depression...
2018: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29717792/systematic-review-on-the-characterization-of-chronic-traumatic-encephalopathy-by-mri-and-mrs
#17
Rahel Ruprecht, Eva Scheurer, Claudia Lenz
BACKGROUND: Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease that is found in people who have suffered from chronic traumatic brain injury (TBI). Up to now, diagnosis of CTE could only be made based on postmortem histopathological examinations. The application of MR techniques might offer a promising possibility for in vivo diagnoses. PURPOSE/HYPOTHESIS: To provide a critical systematic review of the characterization of chronic TBI and CTE by considering the range of MR techniques...
May 2, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29710395/age-of-first-exposure-to-tackle-football-and-chronic-traumatic-encephalopathy
#18
Michael L Alosco, Jesse Mez, Yorghos Tripodis, Patrick T Kiernan, Bobak Abdolmohammadi, Lauren Murphy, Neil W Kowall, Thor D Stein, Bertrand Russell Huber, Lee E Goldstein, Robert C Cantu, Douglas I Katz, Christine E Chaisson, Brett Martin, Todd M Solomon, Michael D McClean, Daniel H Daneshvar, Christopher J Nowinski, Robert A Stern, Ann C McKee
OBJECTIVE: To examine the effect of age of first exposure to tackle football on CTE pathological severity and age of neurobehavioral symptom onset in tackle football players with neuropathologically-confirmed CTE. METHODS: The sample included 246 tackle football players who donated their brains for neuropathological examination. 211 were diagnosed with CTE (126/211 were without comorbid neurodegenerative diseases) and 35 were without CTE. Informant interviews ascertained age of first exposure and age of cognitive and behavioral/mood symptom onset...
April 30, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29700592/three-dimensional-ct-enterography-versus-barium-follow-through-examination-in-measurement-of-remnant-small-intestinal-length-in-short-bowel-syndrome-patients
#19
Wei Cheng, Shaoyi Zhang, Jian Wang, Changsheng Zhou, Yousheng Li, Jieshou Li
PURPOSE: To evaluate the feasibility and accuracy of remnant small intestinal length measured by barium follow-through (BaFT) examination and three-dimensional CT enterography (CTe). MATERIALS AND METHODS: Twenty-nine consecutive short bowel syndrome patients (SBS) who underwent BaFT, CTe, and prior surgical measurements of small intestine were included. Measurements of total remnant small intestinal length on BaFT and CTe were compared to surgical measurements using Spearman's rank correlation coefficients, Bland-Altman plots, and paired t test...
April 26, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29682240/extending-the-range-of-differential-diagnosis-of-chronic-traumatic-encephalopathy-of-the-boxer-insights-from-a-case-report
#20
Leonardo Caixeta, Iron Dangoni, Rafael Dias de Sousa, Pedro Paulo Dias Soares, Andreia Costa Rabelo Mendonça
Sports activities associated with repetitive cranial trauma have become a fad and are popular in gyms and even among children. It is important to consistently characterize the consequences of such sports activities in order to better advise society on the real risks to the central nervous system. We present the case of a former boxer reporting cognitive and behavioral symptoms that began six years after his retirement as a boxer, evolving progressively with parkinsonian and cerebellar features suggestive of probable chronic traumatic encephalopathy (CTE)...
January 2018: Dementia & Neuropsychologia
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