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https://www.readbyqxmd.com/read/28734297/nonequilibrium-phase-coexistence-and-criticality-near-the-second-explosion-limit-of-hydrogen-combustion
#1
Lucas B Newcomb, Mohammad Alaghemandi, Jason R Green
While hydrogen is a promising source of clean energy, the safety and optimization of hydrogen technologies rely on controlling ignition through explosion limits: pressure-temperature boundaries separating explosive behavior from comparatively slow burning. Here, we show that the emergent nonequilibrium chemistry of combustible mixtures can exhibit the quantitative features of a phase transition. With stochastic simulations of the chemical kinetics for a model mechanism of hydrogen combustion, we show that the boundaries marking explosive domains of kinetic behavior are nonequilibrium critical points...
July 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28732161/an-elegant-ph-responsive-nanovehicle-for-drug-delivery-based-on-triazine-dendrimer-modified-magnetic-nanoparticles
#2
Amir Landarani-Isfahani, Majid Moghadam, Shima Mohammadi, Maryam Royvaran, Naimeh Moshtael-Arani, Saghar Rezaei, Shahram Tangestaninejad, Valiollah Mirkhani, Iraj Mohammadpoor-Baltork
Owing to properties of magnetic nanoparticles and elegant three-dimensional macromolecule architectural features, dendrimeric structures have been investigated as nanoscale drug delivery systems. In this paper, a novel magnetic nanocarrier, generation two (G2) triazine dendrimer modified Fe3O4@SiO2 magnetic nanoparticles (MNP-G2), was designed, fabricated and characterized by Fourier transform infrared (FT-IR), thermal gravimetric analysis (TGA), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS)...
July 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28730853/dengue-in-the-elderly-a-review
#3
Ray Junhao Lin, Tau Hong Lee, Yee Sin Leo
Changing dengue epidemiological trends have resulted in a shift in the disease burden to the adult population. Older adults suffer from poorer outcomes as compared to their younger counterparts, making clinical management of this sub-population particularly challenging. Areas covered: We present a review of the current literature on the changing epidemiology of dengue in the elderly, the atypical features of the clinical disease in this population with emphasis on severe disease presentations and challenges in the current management strategies...
July 21, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28728944/ultrasound-guided-thoracic-paravertebral-block-cadaveric-study-in-foxes-vulpes-vulpes
#4
Paolo Monticelli, Ian Jones, Jaime Viscasillas
OBJECTIVE: To describe an ultrasound-guided thoracic paravertebral block in canidae. STUDY DESIGN: Prospective, experimental, cadaveric study. ANIMALS: Twelve thawed fox cadavers. METHODS: A 15 MHz linear transducer was used to visualize the paravertebral space at the level of the fifth thoracic vertebrae. Iohexol (300 mg mL(-1)) at 0.2 mL kg(-1) was injected into the right and left paravertebral spaces under ultrasound guidance using a Tuohy needle...
March 22, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28726234/-current-status-of-congenital-myasthenic-syndromes
#5
REVIEW
M Bestue-Cardiel, D Natera-de Benito
Since Engel reported the first case of congenital myasthenia in 1977 and the first pathogenic gene was found in 1995, knowledge about congenital myasthenic syndromes has continued to grow. Over the years, the pathogenic basis, its clinical features, the phenotype-genotype correlations that have been established and its therapeutic management have all been described. In this group of diseases the safety margin of neuromuscular transmission is altered by different mechanisms: in the synthesis or storage of acetylcholine quanta in the synaptic vesicles, in the calcium-mediated release of acetylcholine in the nerve terminal or in the efficiency of the quantum released to generate a post-synaptic depolarisation...
August 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28725597/canine-prostate-models-in-preclinical-studies-of-minimally-invasive-interventions-part-i-canine-prostate-anatomy-and-prostate-cancer-models
#6
REVIEW
Fei Sun, Claudia Báez-Díaz, Francisco Miguel Sánchez-Margallo
The high prevalence of prostate cancer (PCa) in elderly men and technical advances in early detection of localized PCa have led to continued efforts to develop new therapeutic options of minimally invasive nature in current urologic oncology community. Increasing newly emerging therapies are undergoing preclinical tests on the technical feasibility, efficacy and safety in animal experiments. The dog is an ideal large animal because of its similar anatomy to human and the capability allowing the use of the same medical devices applied in future clinical trials...
June 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28724848/laparoscopic-excision-of-a-uterine-adenomatoid-tumor-and-a-coexisting-ovarian-teratoma-a-case-report-and-literature-review
#7
Tomohiko Matsuhashi, Ryoko Matsui, Chikako Hasegawa, Tsutomu Hatori, Seiryu Kamoi, Toshiyuki Takeshita
Adenomatoid tumors (ATs) are rare, benign neoplasms occurring mainly in reproductive organs such as the uterus, ovaries, fallopian tubes, and testes. Uterine adenomatoid tumors (UATs) are generally incidentally diagnosed during histopathological examination of excisional biopsies performed for other indications, most commonly uterine leiomyomas. We herein present a 38-year-old woman who underwent laparoscopic excision of a uterine leiomyoma and a right ovarian teratoma. Microscopic examination of the excisional biopsy revealed that the enucleated uterine tumor was composed of proliferating glandular tissue covered with single-layered cells that were surrounded by proliferating smooth muscle cells, corresponding exactly to the features of UATs...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28724271/comparison-of-histopathologic-features-of-endometrial-cancer-based-on-menopausal-status-and-safety-of-ovarian-preservation-in-premenopausal-women
#8
Ozgur Kan, Aysegul Alkilic, Elif Nazlı Cetindag Aydın, Kazibe Koyuncu, Salih Taskin, Firat Ortac
The aim of this study was to investigate the frequency of coexisting ovarian malignancy and to determine whether ovarian preservation is feasible in premenopausal endometrial cancer (EC) patients. The data of 251 patients with endometrioid type endometrial cancer were retrospectively reviewed. We classified patients into two groups based on menopausal status. Information regarding patient age, preoperative and intraoperative evaluations, pathology reports, and follow-up results were abstracted from medical records...
May 2017: Acta Medica Iranica
https://www.readbyqxmd.com/read/28721127/diabetes-in-the-elderly
#9
REVIEW
Katarzyna Mordarska, Małgorzata Godziejewska-Zawada
The prevalence of both type 2 diabetes and prediabetes increases with advancing age. The most important factors leading to hyperglycaemia are as follows: deficiency of insulin secretion developing with age, and growing insulin resistance caused by a change in body composition and sarcopaenia. Clinical features of diabetes in the elderly could be different. Diabetes in elderly people is often diagnosed with delay due to atypical symptoms (dementia, urinary incontinence) and occurrence of mainly postprandial hyperglycaemia...
June 2017: Przeglad Menopauzalny, Menopause Review
https://www.readbyqxmd.com/read/28720615/assessment-of-the-effectiveness-and-safety-of-ethosuximide-in-the-treatment-of-abdominal-pain-related-to-irritable-bowel-syndrome-ibset-protocol-of-a-randomised-parallel-controlled-double-blind-and-multicentre-trial
#10
Nicolas Kerckhove, Julien Scanzi, Bruno Pereira, Denis Ardid, Michel Dapoigny
INTRODUCTION: Irritable bowel syndrome (IBS) is characterised by the association of abdominal chronic pain with bowel habit disorders in the absence of identifiable organic disease. This is the first reason for consultation in gastroenterology, with an estimated prevalence of 10%-15% in industrialised countries. Although this is a benign gastrointestinal disease, its chronicity profoundly impacts the patient's quality of life and causes considerable health spending. Actual medical treatments are poorly efficient on IBS-related abdominal pain, making it a major public health concern...
July 18, 2017: BMJ Open
https://www.readbyqxmd.com/read/28720183/g-loc-warning-algorithms-based-on-emg-features-of-the-gastrocnemius-muscle
#11
Sungho Kim, Taehwan Cho, Yongkyun Lee, Hyojin Koo, Booyong Choi, Dongsoo Kim
BACKGROUND: G-induced loss of consciousness (G-LOC) is mainly caused by failure to sustain an oxygenated blood supply to the pilot's brain because of the sudden acceleration in the direction of the +Gz axis, and is considered a critical safety issue. The purpose of this study was to develop G-LOC warning algorithms based on monitoring electromyograms (EMG) of the gastrocnemius muscle on the calf. METHODS: EMG data was retrieved from a total of 67 pilots and pilot trainees of the Korean Air Force during high-G training on a human centrifugal simulator...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28719989/table-saw-injuries-are-our-safety-features-really-keeping-us-safe
#12
Sarah E Smith, Ian Kendrick, Thomas Huntsman
BACKGROUND: Currently, table saws sold in the United States have 3 safety features (riving knife, blade guard, and antikickback device) designed to prevent personal injury; however, these features can hinder the user's movements and are often disabled or removed. Despite the frequency of table saw injuries, there is relatively limited literature regarding them. METHODS: We performed a retrospective, observational study of characteristics associated with injuries incurred while using a table saw...
March 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28718704/a-study-of-sports-related-orbital-fractures-in-singapore
#13
Jing Zhan Lock, Raghuraj Hegde, Stephanie Young, Thiam Chye Lim, Shantha Amrith, Gangadhara Sundar
With an increased popularity of sport and active living worldwide, our study aims to explore the incidence and features of sports-related orbital fractures in Singapore. 1421 computer tomography (CT) imaging scans of the face and orbits done at the National University Hospital over a 24-month period from January 2013 and December 2014 were reviewed retrospectively for orbital fractures. We identified 483 orbital fractures of which sports injury was the fourth most common etiology (n = 65; 13.5%) after road traffic accident (n = 131; 27...
July 18, 2017: Orbit
https://www.readbyqxmd.com/read/28716855/frailty-screening-tools-for-elderly-patients-incident-to-dialysis
#14
Ismay N van Loon, Namiko A Goto, Franciscus T J Boereboom, Michiel L Bots, Marianne C Verhaar, Marije E Hamaker
BACKGROUND AND OBJECTIVES: A geriatric assessment is an appropriate method for identifying frail elderly patients. In CKD, it may contribute to optimize personalized care. However, a geriatric assessment is time consuming. The purpose of our study was to compare easy to apply frailty screening tools with the geriatric assessment in patients eligible for dialysis. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: A total of 123 patients on incident dialysis ≥65 years old were included <3 weeks before to ≤2 weeks after dialysis initiation, and all underwent a geriatric assessment...
July 17, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28714522/factors-associated-with-safe-early-discharge-after-trans-catheter-aortic-valve-implantation
#15
Omar Aldalati, Friedon Keshavarzi, Amit Kaura, Jonathan Byrne, Mehdi Eskandari, Ranjit Deshpande, Mark Monaghan, Olaf Wendler, Rafal Dworakowski, Philip Maccarthy
BACKGROUND: As transcatheter aortic valve replacement (TAVI) becomes more straightforward, a larger proportion of patients will be well enough to be discharged early. This study sought to characterise the clinical features that allowed patients to be discharged early after TAVI and to evaluate the safety of an early discharge policy. METHODS: All patients undergoing TAVI at the above cited centre from August 2007 to March 2015 were included in this study. Baseline characteristics, in-hospital outcomes, re-admissions and mortality were compared...
July 17, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28711151/intelligent-cooperation-a-framework-of-pedagogic-practice-in-the-operating-room
#16
Gary Sutkin, Eliza B Littleton, Steven L Kanter
BACKGROUND: Surgeons who work with trainees must address their learning needs without compromising patient safety. METHODS: We used a constructivist grounded theory approach to examine videos of five teaching surgeries. Attending surgeons were interviewed afterward while watching cued videos of their cases. Codes were iteratively refined into major themes, and then constructed into a larger framework. RESULTS: We present a novel framework, Intelligent Cooperation, which accounts for the highly adaptive, iterative features of surgical teaching in the operating room...
July 1, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/28710840/characterization-of-scientific-studies-usually-cited-as-evidence-of-adverse-effects-of-gm-food-feed
#17
REVIEW
M A Sánchez, W A Parrott
GM crops are the most studied crops in history. Approximately 5% of the safety studies on them show adverse effects that are a cause for concern, and tend to be featured in media reports. Although these reports are based on just a handful of GM events, they are used to cast doubt on all GM crops. Furthermore, they tend to come from just a few laboratories and are published in less important journals. Importantly, a close examination of these reports invariably shows methodological flaws that invalidate any conclusions of adverse effects...
July 15, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28709843/-safety-management-and-compliance-with-rules
#18
A Vacher, J Albentosa, Y Auroy
The design of rules (laws, norms, policies, procedures, protocols) and the implementation of a management that aimed at conforming the behaviors of operators with these rules has long been the dominant approach to improve safety in socio-technical systems. This approach has proven to be effective in enhancing safety by enabling organizations to cope with predictable risks and failures. However, in our modern and constantly evolving socio-technical systems, where the management of unforeseen situation has become the rule, this approach has shown its limitations: operators' initiatives, which sometimes deviate from rules, are equally important for maintaining safety...
July 11, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28709585/patients-come-from-populations-and-populations-contain-patients-a-two-stage-scientific-and-ethics-review-the-next-adaptation-for-single-institutional-review-boards
#19
David Knopman, Eli Alford, Kaitlin Tate, Mark Long, Ara S Khachaturian
INTRODUCTION: For nearly 50 years, institutional review boards (IRB) and independent ethics committees have featured local oversight as a core function of research ethics reviews. However growing complexity in Alzheimer's clinical research suggests current approaches to research volunteer safety is hampering development of new therapeutics. As a partial response to this challenge, the NIH has mandated that all NIH-funded multi-site studies will use a single Institutional Review Board...
July 11, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28707679/anaplastic-thyroid-carcinoma-from-clinicopathology-to-genetics-and-advanced-therapies
#20
REVIEW
Eleonora Molinaro, Cristina Romei, Agnese Biagini, Elena Sabini, Laura Agate, Salvatore Mazzeo, Gabriele Materazzi, Stefano Sellari-Franceschini, Alessandro Ribechini, Liborio Torregrossa, Fulvio Basolo, Paolo Vitti, Rossella Elisei
Anaplastic thyroid carcinoma (ATC) is a rare malignancy, accounting for 1-2% of all thyroid cancers. Although rare, ATC accounts for the majority of deaths from thyroid carcinoma. ATC often originates in a pre-existing thyroid cancer lesion, as suggested by the simultaneous presence of areas of differentiated or poorly differentiated thyroid carcinoma. ATC is characterized by the accumulation of several oncogenic alterations, and studies have shown that an increased number of oncogenic alterations equates to an increased level of dedifferentiation and aggressiveness...
July 14, 2017: Nature Reviews. Endocrinology
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