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https://www.readbyqxmd.com/read/29244215/development-of-a-validated-liquid-chromatographic-method-for-quantification-of-sorafenib-tosylate-in-the-presence-of-stress-induced-degradation-products-and-in-biological-matrix-employing-analytical-quality-by-design-aqbd-approach
#1
Teenu Sharma, Rajneet Kaur Khurana, Atul Jain, O P Katare, Bhupinder Singh
The current research work envisages AQbD-enabled development of a simple, rapid, sensitive, specific, robust and cost-effective stability indicating reversed phase high performance liquid chromatographic (RP-HPLC) method for determining stress-induced forced degradation products of sorafenib tosylate (SFN). An Ishikawa fish bone diagram was constructed to embark upon analytical target profile (ATP) and critical analytical attributes (CAAs) i.e., peak area, theoretical plates, retention time (Rt ) and peak tailing...
December 15, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29243461/physicians-working-conditions-health-and-working-capacity
#2
Marko Elovainio, Marianna Virtanen, Tuula Oksanen
Changes in the working environment will also influence the work of physicians. The greatest of these changes on the Finnish scale, the SOTE reform (the reform in social welfare and public health services), still lies ahead. Labor shortage, on-call duties and patient record systems providing little support to work add to the burden. In surveys related to psychosocial working conditions, physicians' greatest work load factors have been rush, forced working pace and poor communication despite the fact that, on average, they consider their working conditions to be good, frequently better than those of other professional groups, and are committed to carry on with their work until retirement age...
2017: Duodecim; Lääketieteellinen Aikakauskirja
https://www.readbyqxmd.com/read/29240511/meeting-the-nutritional-needs-of-premature-babies-their-future-is-in-our-hands
#3
Arieh Riskin
The goals of early nutrition in preterm infants are to provide all the necessary vital nutrients, achieve extra-uterine growth rates similar to fetuses of the same gestational age, and support functional neurodevelopmental outcomes that are comparable to those of infants born at term. It is vital to provide nutrition that will maximally support brain growth and development, but over-feeding with accelerated growth, fat accumulation and long-term metabolic consequences should also be avoided. Because the morbidity associated with prematurity increases nutritional and energetic demands, the basic approach is of providing early intensive nutrition...
December 2, 2017: British Journal of Hospital Medicine
https://www.readbyqxmd.com/read/29240435/electrostatic-self-assembly-enabling-integrated-bulk-and-interfacial-sodium-storage-in-3d-titania-graphene-hybrid
#4
Guiliang Xu, Lisong Xiao, Tian Sheng, Jianzhao Liu, Yi-Xin Hu, Tianyuan Ma, Rachid Amine, Yingying Xie, Xiaoyi Zhang, Yuzi Liu, Yang Ren, Chengjun Sun, Steve M Heald, Jasmina Kovacevic, Yee Hwa Sehlleier, Christof Schulz, Wenjuan Liu Mattis, Shi-Gang Sun, Hartmut Wiggers, Zonghai Chen, Khalil Amine
Room temperature sodium-ion batteries have attracted increased attention for energy storage due to the natural abundance of sodium. However, it remains a huge challenge to develop versatile electrode materials with favorable properties, which requires smart structure design and good mechanistic understanding. Herein, we reported a general and scalable approach to synthesize 3D titania-graphene hybrid via electrostatic-interaction-induced self-assembly. Synchrotron X-ray probe, transmission electron microscopy and computational modeling revealed that the strong interaction between Titania and graphene through comparably strong van-der-Waals forces not only facilitates bulk Na+ intercalation but also enhances the interfacial sodium storage...
December 14, 2017: Nano Letters
https://www.readbyqxmd.com/read/29240411/singlet-fission-involves-an-interplay-between-energetic-driving-force-and-electronic-coupling-in-perylenediimide-films
#5
Aaron K Le, Jon A Bender, Dylan H Arias, Daniel E Cotton, Justin C Johnson, Sean T Roberts
Due to its ability to offset thermalization losses in photoharvesting systems, singlet fission has become a topic of research interest. During singlet fission, a high energy spin-singlet state in an organic semiconductor divides its energy to form two lower energy spin-triplet excitations on neighboring chromophores. While key insights into mechanisms leading to singlet fission have been gained recently, developing photostable compounds that undergo quantitative singlet fission remains a key challenge. In this report, we explore triplet exciton production via singlet fission in films of perylenediimides, a class of compounds with a long history of use as industrial dyes and pigments due to their photostability...
December 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29240041/reduction-of-excavation-face-collapse-risk-in-tunnelling
#6
Filippo Ariani, Alberto Baldasseroni, Alessandro Muller, Marco Biffino, Alessandro Matteucci
Two large road tunnels, recently developed near Florence, showed instabilities of the excavation face which subsequently caused sixteen collapses. Due to the risk for workers' safety, the public authority for occupational health and safety (ASL) has monitored the failure rate and other background variables in order to assess the possible correlations between risk reductions, its own actions, and those of the various safety actors involved. OBJECTIVES: To evaluate if the interventions carried out by the design team were able to reduce the risks of collapse and which of the ASL actions and/or which other factors were more effective in changing the attitudes of the parties involved, leading to a more expensive but safer project variant...
December 14, 2017: La Medicina del Lavoro
https://www.readbyqxmd.com/read/29239446/shear-thickening-in-concentrated-suspensions-of-smooth-spheres-in-newtonian-suspending-fluids
#7
REVIEW
Morton M Denn, Jeffrey F Morris, Daniel Bonn
Shear thickening is a phenomenon in which the viscosity of a suspension increases with increasing stress or shear rate, sometimes in a discontinuous fashion. While the phenomenon, when observed in suspensions of corn starch in water, or Oobleck, is popular as a science experiment for children, shear thickening is actually of considerable importance for technological applications and exhibited by far simpler systems. Concentrated suspensions of smooth hard spheres will exhibit shear thickening, and understanding this behavior has required a fundamental change in the paradigm of describing low-Reynolds-number solid-fluid flows, in which contact forces have traditionally been absent...
December 14, 2017: Soft Matter
https://www.readbyqxmd.com/read/29238259/front-crawl-swimming-performance-and-bi-lateral-force-asymmetry-during-land-based-and-tethered-swimming-tests
#8
Karini B Dos Santos, Paulo C Barauce Bento, Gleber Pereira, Carl Payton, André L F Rodacki
The aims of this study were to investigate whether land-based and tethered swimming strength tests can explain swimming performance in 200-meter front crawl and, whether these tests were able to identify bilateral symmetry in force production. In the first session, eighteen swimmers completed a maximum effort 200 m front crawl swim (swimming performance) and 15 seconds maximal effort tethered front crawl swim. In the second session, participants performed the upper extremity isometric strength test. Peak force production of tethered swimming and isometric strength tests were significantly correlated for the strongest and weakest sides (r = 0...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29235057/design-and-assessment-of-a-dynamic-perfusion-bioreactor-for-large-bone-tissue-engineering-scaffolds
#9
Birru Bhaskar, Robert Owen, Hossein Bahmaee, Parcha Sreenivasa Rao, Gwendolen C Reilly
Bioreactors can be used to apply fluid flow in vitro to scaffolds to improve mass transport of media and apply mechanical forces to cells. In this study, we developed and tested an autoclavable, modular perfusion bioreactor suitable for large scaffolds. We investigated the effects of fluid flow induced shear stress (FFSS) on osteogenic differentiation of human embryonic stem cell-derived mesenchymal progenitors (hES-MP cells) cultured on large polyurethane (PU) scaffolds (30 mm diameter × 5 mm thickness) in osteogenesis induction media (OIM)...
December 12, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29231074/hybrid-response-surface-methodology-artificial-neural-network-optimization-of-drying-process-of-banana-slices-in-a-forced-convective-dryer
#10
Amin Taheri-Garavand, Fatemeh Karimi, Mahmoud Karimi, Valiullah Lotfi, Golmohammad Khoobbakht
The aim of the study is to fit models for predicting surfaces using the response surface methodology and the artificial neural network to optimize for obtaining the maximum acceptability using desirability functions methodology in a hot air drying process of banana slices. The drying air temperature, air velocity, and drying time were chosen as independent factors and moisture content, drying rate, energy efficiency, and exergy efficiency were dependent variables or responses in the mentioned drying process...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/29229756/decoding-the-molecular-switches-of-natriuretic-peptides-which-differentiate-its-vascular-and-renal-functions
#11
Sindhuja Sridharan, R Manjunatha Kini
Heart failure (HF) is associated with high morbidity and mortality. Dysfunction of blood pressure and/or volume homeostatic processes result in lower perfusion and/or congestion. Treatment strategies exerting differential effects on pressure and volume mechanisms are critical in handling patients with HF. Atrial natriuretic peptides (ANP) is a key hormone in maintaining circulation. It binds to NP receptor-A (NPR-A) on vasculature, kidneys and nervous system to lowers blood pressure and volume. It exerts a concentration-dependent pharmacological activity; only increased renal excretion of water and sodium at low doses and vasodilation along with renal effects at slightly higher doses...
December 11, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29225557/toward-the-development-of-a-flexible-mesoscale-mri-compatible-neurosurgical-continuum-robot
#12
Yeongjin Kim, Shing Shin Cheng, Mahamadou Diakite, Rao P Gullapalli, J Marc Simard, Jaydev P Desai
Brain tumor, be it primary or metastatic, is usually life threatening for a person of any age. Primary surgical resection which is one of the most effective ways of treating brain tumors can have tremendously increased success rate if the appropriate imaging modality is used for complete tumor resection. Magnetic resonance imaging (MRI) is the imaging modality of choice for brain tumor imaging because of its excellent soft-tissue contrast. MRI combined with continuum soft robotics has immense potential to be the next major technological breakthrough in the field of brain cancer diagnosis and therapy...
December 2017: IEEE Transactions on Robotics: a Publication of the IEEE Robotics and Automation Society
https://www.readbyqxmd.com/read/29223055/structure-elucidation-and-degradation-kinetic-study-of-ofloxacin-using-surface-enhanced-raman-spectroscopy
#13
Marwa R El-Zahry, Bernhard Lendl
A simple, fast and sensitive surface enhanced Raman spectroscopy (SERS) method for quantitative determination of fluoroquinolone antibiotic Ofloxacin (OFX) is presented. Also the stability behavior of OFX was investigated by monitoring the SERS spectra of OFX after various degradation processes. Acidic, basic and oxidative force degradation processes were applied at different time intervals. The forced degradation conditions were conducted and followed using SERS method utilizing silver nanoparticles (Ag NPs) as a SERS substrate...
December 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29222596/the-effects-of-local-forearm-muscle-cooling-on-motor-unit-properties
#14
Matthew M Mallette, Lara A Green, David A Gabriel, Stephen S Cheung
PURPOSE: Muscle cooling impairs maximal force. Using needle electromyography (EMG) to assess motor unit properties during muscle cooling, is limited and equivocal. Therefore, we aimed to determine the impact of local muscle cooling on motor unit firing properties using surface EMG decomposition. METHODS: Twenty participants (12 M, 8 F) completed maximal, evoked, and trapezoidal contractions during thermoneutral and cold muscle conditions. Forearm muscle temperature was manipulated using 10-min neutral (~ 32 °C) or 20-min cold (~ 3 °C) water baths...
December 8, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29221665/effect-of-wrist-posture-rate-of-force-development-relaxation-and-isotonic-contractions-on-finger-force-independence
#15
Stephen E May, Peter J Keir
The multi-articular anatomy and inter-connections of the extrinsic finger muscles suggests that wrist posture may affect enslaved finger forces. The purpose of this study was to determine the effects of (i) wrist posture on enslaved finger forces during ramp and isotonic exertions, and (ii) the rate of force development on enslaved forces and error. Twelve men performed 3 repetitions of isometric finger flexion and extension force with index and ring fingers with the wrist in 30° flexion, neutral, and 30° extension...
December 2, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29221299/surgical-site-infections-after-lung-resection-a-prospective-study-of-risk-factors-in-1-091-consecutive-patients
#16
Andrea Imperatori, Elisa Nardecchia, Lorenzo Dominioni, Daniele Sambucci, Sebastiano Spampatti, Giancarlo Feliciotti, Nicola Rotolo
Background: To assess incidence and risk factors of surgical site infections (SSI) (wound infection, pneumonia, empyema) in a monocentric series of patients undergoing lung resection over a decade. Methods: All patients undergoing lung resection at our institution in 2006-2015 [wedge resection, n=579; lobectomy, n=472 (12% after chemo/radiotherapy); pneumonectomy, n=40 (47% after chemo/radiotherapy)], were prospectively enrolled. Perioperative SSI risk factors were recorded: age, gender, blood haemoglobin, lymphocyte count, serum albumin, forced expiratory volume in 1 second percentage (FEV1%) of predicted, antibiotic prophylaxis, length of stay, diabetes, malignancy, steroid therapy, induction chemo/radiotherapy, resection in 2006-2010/2011-2015, urgent/elective procedure, videothoracoscopic/open approach, resection type, operative time...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29220702/the-effect-of-subjective-awareness-measures-on-performance-in-artificial-grammar-learning-task
#17
Ivan I Ivanchei, Nadezhda V Moroshkina
Systematic research into implicit learning requires well-developed awareness-measurement techniques. Recently, trial-by-trial measures have been widely used. However, they can increase complexity of a study because they are an additional experimental variable. We tested the effects of these measures on performance in artificial grammar learning study. Four groups of participants were assigned to different awareness measures conditions: confidence ratings, post-decision wagering, decision strategy attribution or none...
December 5, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/29218661/the-sages-fundamental-use-of-surgical-energy-program-fuse-history-development-and-purpose
#18
P Fuchshuber, S Schwaitzberg, D Jones, S B Jones, L Feldman, M Munro, T Robinson, G Purcell-Jackson, D Mikami, A Madani, M Brunt, B Dunkin, C Gugliemi, L Groah, R Lim, J Mischna, C R Voyles
BACKGROUND: Adverse events due to energy device use in surgical operating rooms are a daily occurrence. These occur at a rate of approximately 1-2 per 1000 operations. Hundreds of operating room fires occur each year in the United States, some causing severe injury and even mortality. The Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) therefore created the first comprehensive educational curriculum on the safe use of surgical energy devices, called Fundamental Use of Surgical Energy (FUSE)...
December 7, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29217483/in-vivo-measurement-of-the-rate-constant-of-liver-handling-of-glucose-and-glucose-uptake-by-insulin-dependent-tissues-using-a-mathematical-model-for-glucose-homeostasis-in-diabetic-rats
#19
Mercedes Lombarte, Maela Lupo, L Fina Brenda, German Campetelli, A R Buzalaf Marilia, Marta Basualdo, Alfredo Rigalli
Diabetes mellitus is a disease that affects glucose homeostasis. The World Health Organization informs that there are over 347 million people in the world with diabetes. The diagnosis and characterization of glucose homeostasis in different metabolic conditions are subjects of great importance with high clinical impact. There are many mathematical models that describe the gluco-regulatory system in detail. However, the use of these models is limited because they have a large number of mathematical equations and parameters and they require complex methodologies to estimate of them...
December 4, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29217370/a-quality-improvement-initiative-to-increase-tdap-tetanus-diphtheria-acellular-pertussis-vaccination-coverage-among-direct-health-care-providers-at-a-children-s-hospital
#20
Changhong Jiang, LaQuita Whitmore-Sisco, Aditya H Gaur, Elisabeth E Adderson
OBJECTIVES: Health care providers (HCP) are at high risk of acquiring and transmitting pertussis to susceptible family members, co-workers, and patients. Public health authorities recommend administering a single dose of Tdap (tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis) vaccine to all adults, including HCP, to increase adult immunity to pertussis. We set a quality improvement goal to increase Tdap vaccination coverage among HCP who provided direct patient care at a children's hospital from 58% to 90% over 18 months...
December 4, 2017: Vaccine
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