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https://www.readbyqxmd.com/read/28351128/nanoparticles-of-titanium-and-zinc-oxides-as-novel-agents-in-tumor-treatment-a-review
#1
Janusz Bogdan, Joanna Pławińska-Czarnak, Joanna Zarzyńska
Cancer has become a global problem. On all continents, a great number of people are diagnosed with this disease. In spite of the progress in medical care, cancer still ends fatal for a great number of the ill, either as a result of a late diagnosis or due to inefficiency of therapies. The majority of the tumors are resistant to drugs. Thus, the search for new, more effective therapy methods continues. Recently, nanotechnology has been attributed with big expectations in respect of the cancer fight. That interdisciplinary field of science creates nanomaterials (NMs) and nanoparticles (NPs) that can be applied, e...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28351127/absorption-amelioration-of-amorphous-si-film-by-introducing-metal-silicide-nanoparticles
#2
Hui Sun, Hsuan-Chung Wu, Sheng-Chi Chen, Che-Wei Ma Lee, Xin Wang
Amorphous Si (a-Si) films with metal silicide are expected to enhance the absorption ability of pure a-Si films. In this present study, NiSi (20 nm)/Si (40 nm) and AlSi (20 nm)/Si (40 nm) bilayer thin films are deposited through radio frequency (RF) sputtering at room temperature. The influence of the film's composition and the annealing temperature on the film's optical absorption is investigated. The results show that all the NiSi/Si films and AlSi/Si films possess higher absorption ability compared to a pure a-Si film (60 nm)...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28351090/an-increase-in-normal-sua-level-within-the-normal-range-predicts-risk-of-metabolic-syndrome-especially-in-women-a-cross-sectional-study
#3
Qian Li, Jing Lu, Xi Cao, Ting-Ting Shi, Jian-Ping Feng, Jin-Kui Yang
This study was aimed to evaluate the relationship between normal serum uric acid (SUA) level and metabolic syndrome (MetS) risk. This cross-sectional study involved 1914 subjects with MetS and 3 659 healthy controls aged 18-79 years. All participants filled out questionnaires and underwent physical examination and blood sample collection for biochemical examination. Demographic and clinical characteristics data were analyzed by t-test or chi-squared test. Normal SUA levels were divided into quartiles. Associations between quartiles of normal SUA level and the risk of MetS were explored using logistic regression analysis and receiver operating characteristic (ROC) curve analysis...
March 28, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28351071/neurologic-deficits-have-a-negative-impact-on-patient-related-outcomes-in-primary-presentation-adult-symptomatic-lumbar-scoliosis-surgical-treatment-at-one-year-follow-up
#4
Daniel G Kang, Christine Baldus, Steven D Glassman, Christopher I Shaffrey, Jon D Lurie, Keith H Bridwell
STUDY DESIGN: A retrospective analysis of prospective, multicenter National Institute of Health clinical trial. OBJECTIVE: The aim of this study was to assess the rate of neurologic complications and impact of new neurologic deficits on 1-year postoperative patient-reported outcomes (PROs). SUMMARY OF BACKGROUND DATA: There are limited studies evaluating the impact of new neurologic deficits on PROs following surgery for primary presentation adult lumbar scoliosis...
April 1, 2017: Spine
https://www.readbyqxmd.com/read/28351068/what-attitudes-and-values-are-incorporated-into-self-as-part-of-professional-identity-construction-when-becoming-a-surgeon
#5
Alexandra Cope, Jeff Bezemer, Stella Mavroveli, Roger Kneebone
PURPOSE: To make explicit the attitudes and values of a community of surgeons, with the aim of understanding professional identity construction within a specific group of residents. METHOD: Using a grounded theory method, the authors collected data from 16 postgraduate surgeons through interviews. They complemented these initial interview data with ethnographic observations and additional descriptive interviews to explore the attitudes and values learned by surgeons during residency training (2010-2013)...
April 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28351065/institutional-incentives-for-mentoring-at-the-u-s-department-of-veterans-affairs-and-universities-associations-with-mentors-perceptions-and-time-spent-mentoring
#6
Natalya C Maisel, Max A Halvorson, John W Finney, Xiaoyu Bi, Ko P Hayashi, Daniel M Blonigen, Julie C Weitlauf, Christine Timko, Ruth C Cronkite
PURPOSE: Limited empirical attention to date has focused on best practices in advanced research mentoring in the health services research domain. The authors investigated whether institutional incentives for mentoring (e.g., consideration of mentoring in promotion criteria) were associated with mentors' perceptions of mentoring benefits and costs and with time spent mentoring. METHOD: The authors conducted an online survey in 2014 of a national sample of mentors of U...
April 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28351064/the-early-tech-development-course-experiential-commercialization-education-for-the-medical-academician
#7
Jonathan Servoss, Connie Chang, Jonathan Fay, Kevin Ward
PROBLEM: Research produced by medical academicians holds promise for developing into biomedical innovations in therapeutics, devices, diagnostics, and health care information technology; however, the road to biomedical innovation is fraught with risk, including the challenge of moving from basic research insight onto a viable commercialization path. Compounding this challenge is the growing demand on medical academicians to be more productive in their clinical, teaching, and research duties within a resource-constrained environment...
April 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28351063/from-communication-skills-to-skillful-communication-a-longitudinal-integrated-curriculum-for-critical-care-medicine-fellows
#8
Amanda L Roze des Ordons, Christopher J Doig, Philippe Couillard, Jason Lord
PROBLEM: Communication with patients and families in critical care medicine (CCM) can be complex and challenging. A longitudinal curricular model integrating multiple techniques within classroom and clinical milieus may facilitate skillful communication across diverse settings. APPROACH: In 2014-2015, the authors developed and implemented a curriculum for CCM fellows at the Cumming School of Medicine, University of Calgary, to promote the longitudinal development of skillful communication...
April 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28351062/using-national-health-care-databases-and-problem-based-practice-analysis-to-inform-integrated-curriculum-development
#9
Amy J Baker, Mark R Raymond, Steven A Haist, John R Boulet
One challenge when implementing case-based learning, and other approaches to contextualized learning, is determining which clinical problems to include. This article illustrates how health care utilization data, readily available from the National Center for Health Statistics (NCHS), can be incorporated into an educational needs assessment to identify medical problems physicians are likely to encounter in clinical practice. The NCHS survey data summarize patient demographics, diagnoses, and interventions for tens of thousands of patients seen in various settings, including emergency departments (EDs), clinics, and hospitals...
April 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28351061/hittability-the-leader-s-edge
#10
Wiley Souba
Mastery of any discipline entails both the requisite skills and the ability to see things as "hittable." However, the concept of "hittability," which, in the context of leadership, refers to whether or not a specific leadership challenge shows up as hittable (or solvable) for those who are responsible for taking it on, is consistently overlooked. Nevertheless, it is a critical determinant of leadership effectiveness. Hittability is a function of the framing lenses-a person's beliefs, values, and worldviews-which frame the way a person "sees" a leadership challenge...
April 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28351054/drug-delivery-to-the-posterior-segment-of-the-eye
#11
Elad Moisseiev, Anat Loewenstein
Drug delivery into the posterior segment of the eye is complicated by the existence of the blood-ocular barrier. Strategies for delivering drugs to the posterior segment include systemic administration, modification of the barrier, and local drug delivery (including transcorneal, transscleral, and intravitreal). The most commonly used method for drug delivery into the posterior segment is by intravitreal injection. Other routes that can be used to achieve therapeutic drug levels in the posterior segment include topical, iontophoretic, and juxtascleral delivery...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28351051/insights-into-the-physiopathology-of-inflammatory-macular-edema
#12
Marc D de Smet
Macular edema is one of the most common causes of permanent vision loss in patients with uveitis. The current understanding of water balance and metabolism within the retina has given us better insight into the mechanisms underlying macular edema arising from both acute and chronic inflammation. Uveitic macular edema (UME) occurs when the equilibrium between water influx and efflux is lost, and more importantly when compensatory mechanisms are overwhelmed. While in the acute setting, control of inflammation can reestablish homeostasis, chronic inflammation can lead to alternate pathways to establish a water balance...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28351046/retinal-vein-occlusions
#13
Jost B Jonas, Jordi Monés, Agnès Glacet-Bernard, Gabriel Coscas
Retinal vein occlusions (RVOs) have been defined as retinal vascular disorders characterized by dilatation of retinal veins with retinal and subretinal hemorrhages, macular edema, and a varying degree of retinal ischemia. Retinal angiography, either as fluorescein and indocyanine green (ICG) angiography or in the form of optical coherence tomography (OCT)-based angiography, is essential for the diagnosis and assessment of the prognosis of RVOs. It allows the differentiation of diverse types of RVOs, such as perfused or nonperfused, as well as the detection of different modalities in the natural history of RVOs...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28351020/optimization-of-a-new-methodology-for-trace-determination-of-elements-in-biological-fluids-application-for-speciation-of-inorganic-selenium-in-children-s-blood
#14
Reza Akramipour, Mitra Hemati, Nazir Fattahi, Meghdad Pirsaheb, Toraj Ahmadi-Jouibari
The continuous sample drop flow microextraction (CSDFME) joined with the iridium-modified tube graphite furnace atomic absorption spectrometry (GFAAS) has been developed as a highly sensitive technique for the speciation of selenium in blood samples. In this method 32.0μl carbon tetrachloride is transferred to the bottom of a conical sample cup. Then the 5.0ml of aqueous solution transforms to fine droplets while passing through the organic solvent. At this stage, Se(IV)-APDC hydrophobic complex is extracted into the organic solvent...
March 22, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28351016/nano-enabled-paper-humidity-sensor-for-mobile-based-point-of-care-lung-function-monitoring
#15
Mitradip Bhattacharjee, Harshal B Nemade, Dipankar Bandyopadhyay
The frequency of breathing and peak flow rate of exhaled air are necessary parameters to detect chronic obstructive pulmonary diseases (COPDs) such as asthma, bronchitis, or pneumonia. We developed a lung function monitoring point-of-care-testing device (LFM-POCT) consisting of mouthpiece, paper-based humidity sensor, micro-heater, and real-time monitoring unit. Fabrication of a mouthpiece of optimal length ensured that the exhaled air was focused on the humidity-sensor. The resistive relative humidity sensor was developed using a filter paper coated with nanoparticles, which could easily follow the frequency and peak flow rate of the human breathing...
March 22, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28351007/catalytic-role-of-iron-in-the-formation-of-silver-nanoparticles-in-photo-irradiated-ag-dissolved-organic-matter-solution
#16
Yongguang Yin, Dan Han, Chao Tai, Zhiqiang Tan, Xiaoxia Zhou, Sujuan Yu, Jingfu Liu, Guibin Jiang
Photo-reduction of Ag(+) to silver nanoparticle (AgNPs) by dissolved organic matter (DOM) is a possible source of naturally occurring AgNPs. However, how this photo-reduction process is influenced by ubiquitous metal ions is still not well understood. In addition, in previous studies, the formation of AgNPs in DOM solution was usually monitored by UV-Vis spectroscopy, and there is still lack of quantitative analysis for the formed AgNPs. In the present study, the role of Fe(2+)/Fe(3+) at environmental concentration level on this photochemical process was investigated, and the enhanced formation of AgNPs by Fe(2+)/Fe(3+) was probed and quantified by using UV-Vis spectroscopy, transmission electron microscopy, and liquid chromatography-inductively coupled plasma mass spectrometry...
March 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28350998/anticancer-copper-ii-phosphorus-dendrimers-are-potent-proapoptotic-bax-activators
#17
Serge Mignani, Nabil El Brahmi, Laure Eloy, Joel Poupon, Valérie Nicolas, Anke Steinmetz, Said El Kazzouli, Mosto M Bousmina, Mireille Blanchard-Desce, Anne-Marie Caminade, Jean-Pierre Majoral, Thierry Cresteil
A multivalent phosphorus dendrimer 1G3 and its corresponding Cu-complex, 1G3-Cu have been recently identified as agents retaining high antiproliferative potency. This antiproliferative capacity was preserved in cell lines overexpressing the efflux pump ABC B1, whereas cross-resistance was observed in ovarian cancer cell lines resistant to cisplatin. Theoretical 3D models were constructed: the dendrimers appear as irregularly shaped disk-like nano-objects of about 22 Å thickness and 49 Å diameter, which accumulated in cells after penetration by endocytosis...
March 21, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28350983/pushing-yap-into-the-nucleus-with-shear-force
#18
Jason Kuan Han Lai, Didier Y R Stainier
Endothelial cells line blood vessels and experience shear stress from blood flow. In this issue of Developmental Cell, Nakajima and colleagues (2017) show that in zebrafish Yap responds to blood flow by translocating into the nucleus, where it drives a genetic program to maintain vascular stability.
March 27, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28350982/micrornas-make-a-difference-in-cardiovascular-robustness
#19
Rachael Bakker, Richard W Carthew
Invertebrate microRNAs (miRNAs) can suppress developmental variability that is caused by environmental and genetic variation. In this issue of Developmental Cell, Kasper et al. (2017) show that zebrafish miRNAs suppress variability in cardiovascular development during embryogenesis, providing insight into the conserved link between miRNAs and robustness.
March 27, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28350977/small-bowel-obstruction-caused-by-anisakis-and-meckel-s-diverticulum-a-rare-case
#20
G Carbotta, R Laforgia, Michele Milella, M G Sederino, M Minafra, F Fortarezza, D Piscitelli, N Palasciano
INTRODUCTION: Anisakiasis is a parasitic infection caused by the ingestion of raw fish contaminated by larval nematodes of Anisakis species. Intestinal or extraintestinal manifestations are rated to > 4% and >1% respectively. PRESENTATION OF CASE: A 61-year old patient was admitted to our General Surgical and Emergency Unit because of sudden abdominal pain, vomit and constipation. He had eaten raw fish 3 days before admission. Laboratory data showed high levels of WBC and PCR...
November 2016: Il Giornale di Chirurgia
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