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https://www.readbyqxmd.com/read/28550763/mechanical-properties-of-a-nanoporous-membrane-used-in-implantable-medical-devices-correlation-between-experimental-characterization-and-2d-numerical-simulation
#1
F Cristofari, B Piotrowski, R Pesci
Nanoporous membranes are used for the elaboration of implantable medical devices. In order to guaranty their integrity after implantation in a patient body, it is necessary to characterize the microstructure and the mechanical behavior of such membranes. They present randomly distributed pores around 1µm in diameter at the surface. X-ray nanotomography permits to get the geometry of the pores through the thickness with a reduction of the diameter in the core. A multiscale study is done to characterize the membranes: macroscopic tensile tests permit to get the behavior law of the non porous material and in situ tensile tests are carried on in a Scanning Electron Microscope in order to observe the evolution of pores and cracks during loading...
May 18, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28550745/facile-synthesis-and-characterization-of-a-novel-silica-molybdenum-disulfide-hybrid-material
#2
Keqing Zhou, Xiaodong Qian, Rui Gao, Fuding Mei
To improve the dispersion of MoS2 in polymer matrix, a facile synthesis approach was developed in this study through a synergetic effect between two kinds of nanofillers with different dimensionality. The nanohybrids based on two dimensional (2D) MoS2 and 0D silica nanospheres were fabricated by in situ growth method without any surfactants. Characterizations of the hybrid materials were done by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Solid-state (29)Si nuclear magnetic resonance (NMR) spectra, transmission electron micrographs (TEM) and scanning electron microscopy (SEM)...
May 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28550399/addition-of-second-line-steroid-sparing-immunosuppressants-like-mycophenolate-mofetil-improves-outcome-of-immunoglobulin-g4-related-disease-igg4-rd-a-series-from-a-tertiary-care-teaching-hospital-in-south-india
#3
Nikhil Gupta, John Mathew, Hindhumathi Mohan, Sudipta Dhar Chowdhury, Reuben Thomas Kurien, D J Christopher, Balamugesh Thangakunam, Mathew Alexander, Ajith Sivadasan, V Tamilarasi, Anna T Valson, Mahasampath Gowri, Jayakanthan Kabeerdoss, Debashish Danda
IgG4-related disease (IgG4-RD) is a systemic fibro-inflammatory disease. This disease may be associated with elevated serum and tissue IgG4 levels. Early treatment prevents fibrosis and organ damage. We retrospectively studied the clinicopathologic correlation and outcome of treatment in IgG4-RD. This single-center retrospective study was done using electronic records of patients subjected to assay of serum IgG4 levels in our laboratory by nephelometry. There were 473 patients with suspected IgG4-RD. Of them, 41 patients fulfilled comprehensive diagnostic criteria for IgG4-RD and 432 had diseases other than IgG4-RD...
May 26, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28550265/patient-preferences-may-be-indicative-of%C3%A2-normative-issues-in-dementia-research
#4
Cynthia Forlini
Robillard and Feng highlight incongruence between patient preferences and the procedural aspects of research ethics as they relate to protocols for dementia research. Their findings break ground for a reassessment of how research ethics, researchers, and participants (including patients and caregivers) approach participation in dementia research. However, it is unclear whether patient preferences may also herald a normative gap between how dementia research is being conducted and how it should be done. This response uses one of Robillard and Feng's findings to illustrate how descriptive empirical data might be reinterpreted into normative questions that reframe current practices in the context of dementia research...
May 25, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28550245/amyloid-burden-in-obstructive-sleep%C3%A2-apnea
#5
Chang-Ho Yun, Ho-Young Lee, Seung Ku Lee, Hyun Kim, Hyung Suk Seo, Seong Ae Bang, Sang Eun Kim, Douglas N Greve, Rhoda Au, Chol Shin, Robert J Thomas
To test the hypothesis that excessive amyloid deposition is a biological link between obstructive sleep apnea (OSA) and Alzheimer's disease, we determined whether OSA increases cerebral amyloid burden, relative to controls, using Pittsburgh Compound B (PiB) PET imaging. The subjects were adult participants (age 50-65 years) from the Korean Genome and Epidemiology Study. Polysomnography, brain MRI including 3D images, and a detailed neuro-cognitive function test battery were done in 2011-2012. Nineteen OSA subjects (Apnea-Hypopnea Index [AHI] ≥15/h, 21...
May 26, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28549976/brca-mutational-status-initial-disease-presentation-and-clinical-outcome-in-high-grade-serous-advanced-ovarian-cancer-a-multicenter-study
#6
Marco Petrillo, Claudia Marchetti, Rossella De Leo, Angela Musella, Ettore Capoluongo, Ida Paris, Pierluigi Benedetti Panici, Giovanni Scambia, Anna Fagotti
BACKGROUND: In the last decades, several efforts have been done to clarify the role of BRCA mutational status in women with advanced ovarian cancer demonstrating its role in cancer development, as well as the prognostic significance of BRCA genotype. OBJCTIVE: Our aim is to evaluate the correlation between BRCA mutational status and disease presentation in a large series of advanced high-grade serous ovarian cancer patients. STUDY DESIGN: this is a retrospective multicenter study including a consecutive series of newly diagnosed high-grade serous ovarian cancer patients with FIGO Stage IIIC-IV disease, at least 18 months of follow-up time, tested for BRCA 1/2 germline mutation status...
May 23, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28549885/the-radial-approach-to-the-wrist-with-styloidectomy-a-cadaver-study
#7
F-A Lecoq, A Sébilo, P Bellemère
The radial approach to the wrist is already used in several surgical techniques such as radial styloidectomy and Zaidemberg's vascularized radial graft. The aim of our work was to describe the surgical anatomy of that approach and to determine the acceptable limits of radial oblique styloidectomy that does not damage the anterior and posterior radiocarpal ligaments. This radial approach was performed on 11 cadaver specimens. The superficial branches of the radial nerve and the antebrachial cephalic vein were carefully located in the superficial plane...
May 23, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28549884/glomus-tumors-of-the-upper-limb-single-center-retrospective-study-of-clinical-and-functional-outcomes
#8
K Hufschmidt, R Foissac, O Camuzard, N Cardot-Leccia, B Chignon-Sicard, T Balaguer
Glomus tumors are rare and benign hamartomas, arising from neuro-myo-arterial proliferation and deriving from mesenchymal origin. As they have a long-term impact on the individual's quality of life, the primary complaint is unbearable pain. The aim of this study was to assess the clinical and functional outcomes of their surgical treatment, and to review their clinical, radiological and therapeutic features. We performed a retrospective study over a 16-year period including 31 patients with an upper limb glomus tumor...
May 23, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28549876/prediction-and-analysis-of-promiscuous-t-cell-epitopes-derived-from-the-vaccine-candidate-antigens-of-leishmania-donovani-binding-to-mhc-class-ii-alleles-using-in-silico-approach
#9
Manju Kashyap, Varun Jaiswal, Umar Farooq
Visceral leishmaniasis is a dreadful infectious disease and caused by the intracellular protozoan parasites, Leishmania donovani and Leishmania infantum. Despite extensive efforts for developing effective prophylactic vaccine, still no vaccine is available against leishmaniasis. However, advancement in immunoinformatics methods generated new dimension in peptide based vaccine development. The present study was aimed to identify T-cell epitopes from the vaccine candidate antigens like Lipophosphogylcan-3(LPG-3) and Nucleoside hydrolase (NH) from the L...
May 23, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28549810/biodiesel-production-from-microbial-oil-derived-from-wood-isolate-trichoderma-reesei
#10
B Bharathiraja, V Sowmya, Sridevi Sridharan, D Yuvaraj, J Jayamuthunagai, R Praveenkumar
In the present study Trichoderma reesei, a wood isolate can yield high biomass quantities up to 30g/L, yielding 32.4% of lipids of dry cell weight (DCW). Biodiesel production from Trichoderma reesei involved simple unit operations like filtration and ultrasonication, yet giving good lipid yield with desirable bio-diesel properties. Optimization of ultrasonication conditions was done to ensure maximum lipid extraction. SEM analysis of ultrasonicated samples showed distinct breakage of fungal hyphae. The lipids were found to contain 49...
May 17, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549749/shared-decision-making-in-iran-current-and-future-trends
#11
Samira Abbasgholizadeh Rahimi, Mahasti Alizadeh, France Légaré
This paper describes the current situation of shared decision making (SDM) in the Iranian healthcare system, discusses barriers to implementation and gives future directions. What about policy regarding SDM? Although the Ministry of Health and Medical Education has enacted some legislation on informed consent and patients' rights, there is no policy specifically regarding SDM in Iran. What about decision support tools for patients? Although some Iranian researchers and clinicians have highlighted patients' desire to be informed and involved in decisions related to their health, there is no program to develop or evaluate decision support tools such as patient decision aids in Iran...
May 23, 2017: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/28549667/epidemiology-of-cerebrovascular-disease-among-chinese-canadians-with-diabetes
#12
REVIEW
Susy Lam, Joseph Y Chu
BACKGROUND: First-generation Chinese Canadians have usually maintained different lifestyles before immigration to North America, and the question of whether Chinese Canadians with type 2 diabetes have a different stroke profile than that of non-Chinese Canadians remains unanswered. OBJECTIVES: To determine whether 1) Chinese Canadians who have had a stroke within the last 15 years are more likely to have diabetes than non-Chinese Canadians and 2) to explore differences in stroke profiles between the 2 cohorts...
May 23, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28549570/pet-mri-of-the-breast
#13
Donna M Plecha, Peter Faulhaber
The future clinical use of the combination of positron emission tomography (PET) with 2-Fluoro[F-18]-2-Deoxy-d-Glucose (FDG)and MRI is still unclear. If a patient requires a PET and breast DCE-MRI for staging purposes, both scans can be done in the same visit. In the breast, DCE-MRI is better at lesion detection (sensitivity), margin evaluation, and has a higher specificity than CT. The potential for multiparametric qualitative and quantitative imaging is also an advantage of PET/MRI which provides opportunity to improve tumor characterization and may ultimately lead to outcome prediction...
May 10, 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28549293/automated-recognition-of-the-pericardium-contour-on-processed-ct-images-using-genetic-algorithms
#14
É O Rodrigues, L O Rodrigues, L S N Oliveira, A Conci, P Liatsis
This work proposes the use of Genetic Algorithms (GA) in tracing and recognizing the pericardium contour of the human heart using Computed Tomography (CT) images. We assume that each slice of the pericardium can be modelled by an ellipse, the parameters of which need to be optimally determined. An optimal ellipse would be one that closely follows the pericardium contour and, consequently, separates appropriately the epicardial and mediastinal fats of the human heart. Tracing and automatically identifying the pericardium contour aids in medical diagnosis...
May 17, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28549292/globally-supported-radial-basis-function-based-collocation-method-for-evolution-of-level-set-in-mass-segmentation-using-mammograms
#15
Kanchan Lata Kashyap, Manish Kumar Bajpai, Pritee Khanna
Computer-aided detection systems play an important role for the detection of breast abnormalities using mammograms. Global segmentation of mass in mammograms is a complex process due to low contrast mammogram images, irregular shape of mass, speculated margins, and the presence of intensity variations of pixels. This work presents a new approach for mass detection in mammograms, which is based on the variational level set function. Mesh-free based radial basis function (RBF) collocation approach is employed for the evolution of level set function for segmentation of breast as well as suspicious mass region...
May 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28549290/anti-inflammatory-potential-of-hentriacontane-in-lps-stimulated-raw-264-7-cells-and-mice-model
#16
Vidushi Khajuria, Shilpa Gupta, Neha Sharma, Ashok Kumar, Nazir A Lone, Mowkshi Khullar, Prabhu Dutt, Parduman Raj Sharma, Asha Bhagat, Zabeer Ahmed
Hentriacontane, has various pharmacological effects including anti-inflammatory, antitumor and antimicrobial activities. Its anti-inflammatory potential has been demonstrated in peritoneal macrophages. However detailed studies on other models elucidating the mechanistic description of the mode of action has not been done. Hence, the aim of the present study is to evaluate the anti-inflammatory potential of hentriacontane both in-vivo (Balb/c mice) and in-vitro (RAW 264.7 cells). Cytokine inhibition of both pro-inflammatory (TNF-α, IL-6, MCP-1 and IL-1β) and anti-inflammatory (IL-10) cytokines was studied in RAW 264...
May 23, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28549094/a-novel-dominant-mutation-in-sag-the-arrestin-1-gene-is-a-common-cause-of-retinitis-pigmentosa-in-hispanic-families-in-the-southwestern-united-states
#17
Lori S Sullivan, Sara J Bowne, Daniel C Koboldt, Elizabeth L Cadena, John R Heckenlively, Kari E Branham, Dianna H Wheaton, Kaylie D Jones, Richard S Ruiz, Mark E Pennesi, Paul Yang, David Davis-Boozer, Hope Northrup, Vsevold V Gurevich, Rui Chen, Mingchu Xu, Yumei Li, David G Birch, Stephen P Daiger
Purpose: To identify the causes of autosomal dominant retinitis pigmentosa (adRP) in a cohort of families without mutations in known adRP genes and consequently to characterize a novel dominant-acting missense mutation in SAG. Methods: Patients underwent ophthalmologic testing and were screened for mutations using targeted-capture and whole-exome next-generation sequencing. Confirmation and additional screening were done by Sanger sequencing. Haplotypes segregating with the mutation were determined using short tandem repeat and single nucleotide variant polymorphisms...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28548878/immunophenotyping-of-the-cerebrospinal-fluid-as-a-prognostic-factor-at-diagnosis-of-acute-lymphoblastic-leukemia-in-children-and-adolescents
#18
Camila Silva Peres Cancela, Mitiko Murao, Juliana Godoy Assumpção, Marcelo Eduardo de Lima Souza, Antonio Vaz de Macedo, Marcos Borato Viana, Benigna Maria De Oliveira
This study aimed at evaluating the use of immunophenotyping (IMP) in the identification of blast cells in the cerebrospinal fluid (CSF) of children and adolescents with acute lymphoblastic leukemia (ALL). Sixty-seven patients aged 18 years or younger were included. Fifty-five CSF samples were analyzed at initial diagnosis and 17 at the time of relapse. A cytological analysis (CA) was performed in all 72 samples, while IMP was done in 63. Blasts were identified in only three samples by CA, whereas all three samples were found negative by IMP, one of which had no isolation of nucleated cells after centrifugation...
May 26, 2017: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/28548677/destabilization-of-human-insulin-fibrils-by-peptides-of-fruit-bromelain-derived-from-ananas-comosus-pineapple
#19
Sromona Das, Debasish Bhattacharyya
Deposition of insulin aggregates in human body leads to dysfunctioning of several organs. Effectiveness of fruit bromelain from pineapple in prevention of insulin aggregate was investigated. Proteolyses of bromelain was done as par human digestive system and the pool of small peptides was separated from larger peptides and proteins. Under conditions of growth of insulin aggregates from its monomers, this pool of peptides restricted the reaction upto formation of oligomers of limited size. These peptides also destabilized preformed insulin aggregates to oligomers...
May 26, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28548542/a-systematic-review-of-the-impact-of-educational-programs-on-factors-that-affect-nurses-post-operative-pain-management-for-children
#20
Nahar AlReshidi, Tony Long, Angela Darvill
Despite extensive research in the international arena into pain and its management, there is, as yet, little research on the topic of pain in children in Saudi Arabia and in the Gulf countries generally. A systematic review was conducted to explore the impact of education programs on factors affecting paediatric nurses' postoperative pain management practice. This was done in order to advise the creation of an educational program for nurses in Saudi Arabia. Knowledge about pain, attitudes towards pain, beliefs about children's pain, perceptions of children's reports of pain, self-efficacy with regard to pain management, and perceptions of barriers to optimal practice were all considered to be relevant factors...
May 26, 2017: Compr Child Adolesc Nurs
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