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https://www.readbyqxmd.com/read/28795994/potential-and-actual-health-hazards-in-the-dense-urban-operational-environment-critical-gaps-and-solutions-for-military-occupational-health
#1
Steven L Patterson, Blair C R Dancy, Danielle L Ippolito, Jonathan D Stallings
: This paper presents environmental health risks which are prevalent in dense urban environments.We review the current literature and recommendations proposed by environmental medicine experts in a 2-day symposium sponsored by the Department of Defense and supported by the Johns Hopkins University Applied Physics Laboratory.Key hazards in the dense urban operational environment include toxic industrial chemicals and materials, water pollution and sewage, and air pollution. Four critical gaps in environmental medicine were identified: prioritizing chemical and environmental concerns, developing mobile decision aids, personalized health assessments, and better real-time health biomonitoring...
August 8, 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28793969/lung-ultrasound-in-internal-medicine-a-bedside-help-to-increase-accuracy-in-the-diagnosis-of-dyspnea
#2
Tiziano Perrone, Alessia Maggi, Carmelo Sgarlata, Ilaria Palumbo, Elisa Mossolani, Sara Ferrari, Ariel Melloul, Roberta Mussinelli, Michele Boldrini, Ambra Raimondi, Aderville Cabassi, Francesco Salinaro, Stefano Perlini
BACKGROUND: Dyspnea is one of the most frequent causes of admission in Internal Medicine wards, leading to a sizeable utilization of medical resources. STUDY DESIGN AND METHODS: The role of bedside lung ultrasound (LUS) was evaluated in 130 consecutive patients (age: 81±9years), in whom blindly collected LUS results were compared with data obtained by clinical examination, medical history, blood analysis, and chest X-ray. Dyspnea etiology was classified as "cardiac" (n=80), "respiratory" (n=36) or "mixed" (n=14), according to the discharge diagnosis (congestive heart failure either alone [n=80] or associated with pneumonia [n=14], pneumonia [n=24], and obstructive disventilatory syndrome [n=12])...
August 6, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28780442/cold-plasma-interactions-with-plants-morphing-and-movements-of-venus-flytrap-and-mimosa-pudica-induced-by-argon-plasma-jet
#3
Alexander G Volkov, Kunning G Xu, Vladimir I Kolobov
Low temperature (cold) plasma finds an increasing number of applications in biology, medicine and agriculture. In this paper, we report a new effect of plasma induced morphing and movements of Venus flytrap and Mimosa pudica. We have experimentally observed plasma activation of sensitive plant movements and morphing structures in these plants similar to stimulation of their mechanosensors in vivo. Application of an atmospheric pressure argon plasma jet to the inside or outside of a lobe, midrib, or cilia in Dionaea muscipula Ellis induces trap closing...
July 29, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28777535/electrospun-nanofibers-new-concepts-materials-and-applications
#4
Jiajia Xue, Jingwei Xie, Wenying Liu, Younan Xia
Electrospinning is a simple and versatile technique that relies on the electrostatic repulsion between surface charges to continuously draw nanofibers from a viscoelastic fluid. It has been applied to successfully produce nanofibers, with diameters down to tens of nanometers, from a rich variety of materials, including polymers, ceramics, small molecules, and their combinations. In addition to solid nanofibers with a smooth surface, electrospinning has also been adapted to generate nanofibers with a number of secondary structures, including those characterized by a porous, hollow, or core-sheath structure...
August 4, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28776754/quantitative-two-dimensional-ultrashort-echo-time-magnetization-transfer-2d-ute-mt-imaging-of-cortical-bone
#5
Ya-Jun Ma, Anthony Tadros, Jiang Du, Eric Y Chang
PURPOSE: To investigate quantitative 2D ultrashort echo time magnetization transfer (UTE-MT) imaging in ex vivo bovine cortical bone and in vivo human tibial cortical bone. METHODS: Data were acquired from five fresh bovine cortical bone samples and five healthy volunteer tibial cortical bones using a 2D UTE-MT sequence on a clinical 3T scanner. The 2D UTE-MT sequence used four or five MT powers with five frequency offsets. Results were analyzed with a two-pool quantitative MT model, providing measurements of macromolecular fraction (f), macromolecular proton transverse relaxation times (T2m ), proton exchange rates from water/macromolecular to the macromolecular/water pool (RM0m /RM0w ), and spin-lattice relaxation rate of water pool (R1w )...
August 3, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28759767/heavy-metals-in-contaminated-environment-destiny-of-secondary-metabolite-biosynthesis-oxidative-status-and-phytoextraction-in-medicinal-plants
#6
REVIEW
Behnam Asgari Lajayer, Mansour Ghorbanpour, Shahab Nikabadi
Contamination of soils, water and air with toxic heavy metals by various human activities is a crucial environmental problem in both developing and developed countries. Heavy metals could be introduced into medicinal plant products through contaminated environment (soil, water and air resources) and/or poor production practices. Growing of medicinal plants in heavy metal polluted environments may eventually affect the biosynthesis of secondary metabolites, causing significant changes in the quantity and quality of these compounds...
July 28, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28755568/what-patients-think-about-psychogenic-nonepileptic-seizures-in-buenos-aires-argentina-a-qualitative-approach
#7
Mercedes Sarudiansky, Alejandra Inés Lanzillotti, María Marta Areco Pico, Cristina Tenreyro, Laura Scévola, Silvia Kochen, Luciana D'Alessio, Guido Pablo Korman
PURPOSE: To analyse the methods of reasoning with regard to patients' experiences of living with psychogenic nonepileptic seizures (PNES) in Buenos Aires, Argentina. METHOD: A qualitative approach using semi-structured interviews was used to gain an in-depth and contextual understanding of the perspectives of five patients with PNES. Data collection and analysis were followed by an inductive and interpretive approach informed by the principles of thematic analysis...
July 20, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28745853/pneumothorax-in-pediatric-patients-management-strategies-to-improve-patient-outcomes-digest
#8
Matthew Harris, Joshua Rocker, Kathryn H Pade
The clinical presentation of pneumothorax is highly variable. Spontaneous pneumothoraces may present with subtle symptoms when a small air leak is present, but can progress to hemodynamic instability in the setting of tension physiology. The etiologies are broad and the severity can vary greatly. A trauma patient with a pneumothorax may also have the added complexity of other potentially life-threatening injuries. While there is a wealth of evidence-based guidelines for the management of pneumothoraces in the adult literature, the approach to pediatric patients is largely extrapolated from that literature without a significant evidence base...
March 22, 2017: Pediatric Emergency Medicine Practice
https://www.readbyqxmd.com/read/28743094/a-personalized-medicine-approach-to-the-design-of-dry-powder-inhalers-selecting-the-optimal-amount-of-bypass
#9
Thomas Kopsch, Darragh Murnane, Digby Symons
In dry powder inhalers (DPIs) the patient's inhalation manoeuvre strongly influences the release of drug. Drug release from a DPI may also be influenced by the size of any air bypass incorporated in the device. If the amount of bypass is high less air flows through the entrainment geometry and the release rate is lower. In this study we propose to reduce the intra- and inter-patient variations of drug release by controlling the amount of air bypass in a DPI. A fast computational method is proposed that can predict how much bypass is needed for a specified drug delivery rate for a particular patient...
July 22, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28720185/statin-therapy-in-low-risk-air-force-aviators-with-isolated-hypercholesterolemia
#10
Anthony P Tvaryanas, Heather J Mahaney, Valarie M Schroeder, Genny M Maupin
INTRODUCTION: This study evaluated the use of statin therapy in U.S. Air Force (USAF) aviators with isolated hypercholesterolemia in terms of compliance with clinical practice guidelines (CPGs) and effectiveness in reducing low-density lipoprotein cholesterol (LDL-C) and coronary heart disease (CHD) risk. METHODS: This was a mixed design, 8-yr retrospective study that included 8185 participants with isolated hypercholesterolemia, of which 1458 (17.81%) were prescribed statin monotherapy...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28709967/advances-in-asthma-2016-designing-individualized-approaches-to-management
#11
William C Anderson, Andrea Apter, Cullen M Dutmer, Daniel A Searing, Stanley J Szefler
In this years Advances in Asthma review we discuss viral infections in asthma and potential therapeutic agents, the microbiome, novel genetic associations with asthma, air quality and climate effects on asthma, exposures during development and long term sequelae of childhood asthma, patient centered outcome research, and precision medicine. In addition, we discuss application of biomarkers to precision medicine, and new information on asthma medications. New evidence indicates that rhinovirus-triggered asthma exacerbations become more severe as the degree of sensitization to dust mite and mouse increase...
July 11, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28676021/medical-management-and-risk-reduction-of-the-cardiovascular-effects-of-underwater-diving
#12
Thomas F Whayne
Undersea diving is a sport and commercial industry. Knowledge of potential problems began with Caisson disease or "the bends", first identified with compressed air in the construction of tunnels under rivers in the 19th century. Subsequently, there was the commercially used old-fashioned diving helmet attached to a suit, with compressed air pumped down from the surface. Breathhold diving, with no supplementary source of air or other breathing mixture, is also a sport as well as a commercial fishing tool in some parts of the world...
June 20, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28665488/chemical-composition-and-antioxidant-activity-of-the-volatile-fraction-extracted-from-air-dried-fruits-of-tunisian-eryngium-maritimum-l-ecotypes
#13
Houda Ben Lajnef, Federico Ferioli, Federica Pasini, Joanna Politowicz, Abdelhamid Khaldi, L Filippo D'Antuono, Maria Fiorenza Caboni, Nizar Nasri
BACKGROUND: Eryngium maritimum L., also known as "sea holly", is a typical dune plant species belonging to the Apiaceae family and commonly used in Tunisia for therapeutic purposes in folk medicine. In the present study, the chemical composition and antioxidant activity of the volatile fraction extracted from air-dried fruits of five Tunisian E. maritimum ecotypes were determined. RESULTS: The total volatile amount ranged from 0.31 to 0.93% (w d.w.(-1) ). Sixty-six volatile components were identified by means of GC-MS and accounted for 77...
June 30, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28661698/the-role-of-chest-computed-tomography-in-the-evaluation-and-management-of-the-patient-with-copd
#14
Wassim W Labaki, Carlos H Martinez, Fernando J Martinez, Craig J Galbán, Brian D Ross, George R Washko, R Graham Barr, Elizabeth A Regan, Harvey O Coxson, Eric A Hoffman, John D Newell, Douglas Curran-Everett, James C Hogg, James D Crapo, David A Lynch, Ella A Kazerooni, MeiLan K Han
Chronic obstructive pulmonary disease (COPD) exhibits significant heterogeneity in clinical presentation and rate of disease progression, owing at least in part to differing underlying morphologic abnormalities. Symptom assessment and spirometry have traditionally been used to determine disease severity and guide management. However, chest computed tomography (CT) is a widely available and increasingly used imaging modality that can provide additional insight into structural and pathophysiologic pulmonary parameters...
June 29, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28659624/alcohol-recognition-by-flexible-transparent-and-highly-sensitive-graphene-based-thin-film-sensors
#15
Xuezhu Xu, Jian Zhou, Yangyang Xin, Gilles Lubineau, Qian Ma, Long Jiang
Chemical sensors detect a variety of chemicals across numerous fields, such as automobile, aerospace, safety, indoor air quality, environmental control, food, industrial production and medicine. We successfully assemble an alcohol-sensing device comprising a thin-film sensor made of graphene nanosheets (GNs) and bacterial cellulose nanofibers (BCNs). We show that the GN/BCN sensor has a high selectivity to ethanol by distinguishing liquid-phase or vapor-phase ethanol (C2H6O) from water (H2O) intelligently with accurate transformation into electrical signals in devices...
June 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28653375/cardiac-quantitative-susceptibility-mapping-qsm-for-heart-chamber-oxygenation
#16
Yan Wen, Thanh D Nguyen, Zhe Liu, Pascal Spincemaille, Dong Zhou, Alexey Dimov, Youngwook Kee, Kofi Deh, Jiwon Kim, Jonathan W Weinsaft, Yi Wang
PURPOSE: To demonstrate the feasibility of in vivo quantitative susceptibility mapping (QSM) in cardiac MRI and to show that mixed-venous oxygen saturation (SvO2 ) can be measured non-invasively using QSM. METHODS: Electrocardiographic-gated multi-echo 2D gradient echo data were collected at 1.5 T from 14 healthy volunteers during successive breath-holds. Phase wraps and fat chemical shift were removed using a graph-cut-based phase analysis and IDEAL in an iterative approach...
June 26, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28652858/tandem-c-sp-3-h-arylation-oxidation-and-arylation-allylic-substitution-of-isoindolinones
#17
Jacqueline Jiménez, Byeong-Seon Kim, Patrick J Walsh
Isoindolinones comprise an important class of medicinally active compounds. Herein we report a straightforward functionalization of the isoindolinones with aryl bromides (22 examples) using a Pd(OAc)2/NIXANTPHOS-based catalyst system. Additionally 3-aryl 3-hydroxy isoindolinone derivatives, which exhibit anti-tumor activity, can be accessed via a tandem reaction. Thus, when the arylation product is exposed to air under basic conditions, in situ oxidation takes place to install the 3-hydroxyl group. Furthermore, a tandem arylation/allylic substitution reaction is advanced in which both the arylation and allylic substitution are catalyzed by the same palladium catalyst...
September 1, 2016: Advanced Synthesis & Catalysis
https://www.readbyqxmd.com/read/28649981/a-practical-and-catalyst-free-trifluoroethylation-reaction-of-amines-using-trifluoroacetic-acid
#18
Keith G Andrews, Radmila Faizova, Ross M Denton
Amines are a fundamentally important class of biologically active compounds and the ability to manipulate their physicochemical properties through the introduction of fluorine is of paramount importance in medicinal chemistry. Current synthesis methods for the construction of fluorinated amines rely on air and moisture sensitive reagents that require special handling or harsh reductants that limit functionality. Here we report practical, catalyst-free, reductive trifluoroethylation reactions of free amines exhibiting remarkable functional group tolerance...
June 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28646964/global-advocacy-needed-for-sepsis-in-children
#19
Sagar Dugani, Niranjan Kissoon
Sepsis in children is a complex syndrome that develops from various infections and results in 15-30% mortality in high-income countries and up to 50% or higher in low-income countries. Worldwide, this represents an annual burden of 30 million cases resulting in 8 million deaths. Not surprisingly, there is a significantly higher burden in low-income countries with children there being 18 times more likely to die before the age of 5 years compared to high-income countries. Factors such as commercial air travel, climate change, and unchecked population growth have contributed to the growing burden of infectious diseases and ensuing sepsis...
June 2017: Journal of Infection
https://www.readbyqxmd.com/read/28639070/osseous-cartilaginous-spreader-graft-and-nasal-framework-reconstruction
#20
Safvet Ors
Revision rhinoplasties and saddle nose deformities usually require grafting for reconstruction. Between January 1, 2000, and January 1, 2017, autologous rib grafts were used in 127 secondary and tertiary rhinoplasty patients [(57/127 females) and (70/127 males)]. Osseous-cartilaginous rib grafts (OCRGs) were divided into three parts (i.e., 1/3 upper peripheral, 1/3 central, and 1/3 lower peripheral). The harvested OCRGs were also shaped as vertical strips using a number 11 scalpel blade. These OCRGs were shaped to form the L-strut cartilaginous graft (LSCGs), osseous-cartilaginous spreader grafts (OCSGs), osseous-cartilaginous onlay grafts, nasal valve grafts (NVGs), and lower lateral cartilaginous grafts (LLCGs)...
June 21, 2017: Aesthetic Plastic Surgery
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