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https://www.readbyqxmd.com/read/28445055/the-molecular-mechanism-of-overhauser-dynamic-nuclear-polarization-in-insulating-solids
#1
Svetlana Pylaeva, Konstantin L Ivanov, Marc Baldus, Daniel Sebastiani, Hossam Elgabarty
Dynamic Nuclear Polarization (DNP), a technique that significantly enhances NMR signals, is experiencing a renaissance owing to enormous methodological developments. In the heart of DNP is a polarization transfer mechanism that endows nuclei with the much larger electronic spin polarization. Polarization transfer via the Overhauser effect is traditionally known to be operative only in liquids and conducting solids. Very recently, surprisingly strong Overhauser effect DNP in insulating solids has been reported, with a DNP efficiency that increases with the magnetic field strength...
April 26, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28443838/charge-detection-mass-spectrometry-weighing-heavier-things
#2
REVIEW
David Z Keifer, Elizabeth E Pierson, Martin F Jarrold
Charge detection mass spectrometry (CDMS) is a single molecule method where the mass of each ion is directly determined from individual measurements of its mass-to-charge ratio and charge. CDMS is particularly valuable for the analysis of high mass and heterogeneous analytes, where conventional MS methods are often confounded. In the last few years, CDMS has received a renaissance. Technical developments have improved the resolution and dramatically increased the breadth of problems that can be addressed. These improvements have moved CDMS more into the mainstream as interest in the application of mass spectrometry to high molecular weight species has grown...
April 26, 2017: Analyst
https://www.readbyqxmd.com/read/28443099/a-century-of-radiation-therapy-and-adaptive-immunity
#3
REVIEW
Dörthe Schaue
The coming of age for immunotherapy (IT) as a genuine treatment option for cancer patients through the development of new and effective agents, in particular immune checkpoint inhibitors, has led to a huge renaissance of an old idea, namely to harness the power of the immune system to that of radiation therapy (RT). It is not an overstatement to say that the combination of RT with IT has provided a new conceptual platform that has re-energized the field of radiation oncology as a whole. One only has to look at the immense rise in sessions at professional conferences and in grant applications dealing with this topic to see its emergence as a force, while the number of published reviews on the topic is staggering...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28440654/holocene-atmospheric-mercury-levels-reconstructed-from-peat-bog-mercury-stable-isotopes
#4
Maxime Enrico, Gael Le Roux, Lars-Eric Heimburger, Pieter Van Beek, Marc Souhaut, Jerome Chmeleff, Jeroen E Sonke
Environmental regulations on mercury (Hg) emissions and associated ecosystem restoration are closely linked to what Hg levels we consider natural. It is widely accepted that atmospheric Hg deposition has increased by a factor 3±1 since pre-industrial times. However, no long-term historical records of actual atmospheric gaseous elemental Hg (GEM) concentrations exist. In this study we report Hg stable isotope signatures in Pyrenean peat records (southwestern Europe) that are used as tracers of Hg deposition pathway (Δ(200)Hg, wet vs dry Hg deposition) and atmospheric Hg sources and cycling (δ(202)Hg, Δ(199)Hg)...
April 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28440233/-clinical-cytology-for-endoscopists-a-practical-guide
#5
REVIEW
Michael Hocke, Theodoros Topalidis, Barbara Braden, Christoph F Dietrich
Clinical cytology was originally used by clinicians to provide rapid diagnosis. However, with advancing medical subspecialization, few clinicians interpret cytology themselves these days, for example, gynecologists, hematologists, urologists, and occasional gastroenterologist (mainly in Asian countries). Cytological assessment enjoyed a renaissance with the development of endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA). Subsequently, pathologists, most of them more experienced in histology, had to take over...
March 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28439378/oman-vision-2050-for-health-research-a-strategic-plan-for-the-future-based-on-the-past-and-present-experience
#6
REVIEW
Adhra Hilal Nasser Al Mawali, Ahmed Mohamed Al Qasmi, Sultana Mohamed Saif Al Sabahi, John Idikula, Mahmoud Attia Abd Elaty, Magdi Morsi, Ali Talib Al Hinai
Health care delivery in Oman has attained great heights since the modern renaissance in 1970. Although the health service had the main impetus all these years, the importance of health research began to take place by mid 1990's and is now gaining momentum as an important responsibility and activity of the Ministry of Health (MoH). Although there has been progressively increasing investment and commitment to research activities in the recent Five Year Plan for Health Development, it still lags behind in the quality and quantity of research output...
March 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/28438398/triglycerides-a-reappraisal
#7
REVIEW
Philipp Wiesner, Karol E Watson
Elevated cholesterol levels are clearly independently associated with adverse cardiovascular events. Another class of lipid particles, triglycerides, is also abundant in the human body and has been found in atherosclerotic plaques. Recent observational studies have demonstrated an association between elevated triglyceride levels and increased risk for future cardiovascular events. With this knowledge and the discovery of effective agents to lower triglyceride levels, the management of triglycerides is currently undergoing a renaissance...
March 21, 2017: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28437132/home-enteral-nutrition-updates-trends-and-challenges
#8
Karen Martin, Gabriela Gardner
The true prevalence of home enteral nutrition (HEN) utilization is unclear and requires further study. HEN therapy has remained virtually unchanged for several decades. However, new trends in HEN are evolving; enteral nutrition is undergoing changes ranging from enteral feeding devices, ingredients used, practice innovations, and challenges with reimbursement. A 2006 Joint Commission call to action that reported 2 sentinel events related to misconnections set things into motion for the transition of enteral device connectors to become specific for enteral nutrition use, which will affect patients who receive HEN...
April 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28429066/atmospheric-pressure-maldi-for-the-noninvasive-characterization-of-carbonaceous-ink-from-renaissance-documents
#9
Giuseppe Grasso, Marzia Calcagno, Alessandro Rapisarda, Roberta D'Agata, Giuseppe Spoto
The analytical methods that are usually applied to determine the compositions of inks from ancient manuscripts usually focus on inorganic components, as in the case of iron gall ink. In this work, we describe the use of atmospheric pressure/matrix-assisted laser desorption ionization-mass spectrometry (AP/MALDI-MS) as a spatially resolved analytical technique for the study of the organic carbonaceous components of inks used in handwritten parts of ancient books for the first time. Large polycyclic aromatic hydrocarbons (L-PAH) were identified in situ in the ink of XVII century handwritten documents...
April 21, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28413756/trifluoroethoxy-coated-subphthalocyanine-affects-trifluoromethylation-of-alkenes-and-alkynes-even-under-low-energy-red-light-irradiation
#10
Kohei Matsuzaki, Tomoya Hiromura, Etsuko Tokunaga, Norio Shibata
Photoredox chemical reactions induced by visible light have undergone a renaissance in recent years. Polypyridyl dyes such as Ir(ppy)3 and Ru(bpy)3 are key catalysts in this event, and blue- or white-light irradiation is required for the chemical transformations. However, it remains a challenge to achieve reactions under the lower energy of red light. We disclose, herein, that trifluoroethoxy-coated subphthalocyanine realizes the red-light-driven trifluoromethylation of alkenes and alkynes with trifluoromethyl iodide in good-to-high yields...
April 2017: ChemistryOpen
https://www.readbyqxmd.com/read/28407481/the-gut-microbiome-connecting-spatial-organization-to-function
#11
REVIEW
Carolina Tropini, Kristen A Earle, Kerwyn Casey Huang, Justin L Sonnenburg
The first rudimentary evidence that the human body harbors a microbiota hinted at the complexity of host-associated microbial ecosystems. Now, almost 400 years later, a renaissance in the study of microbiota spatial organization, driven by coincident revolutions in imaging and sequencing technologies, is revealing functional relationships between biogeography and health, particularly in the vertebrate gut. In this Review, we present our current understanding of principles governing the localization of intestinal bacteria, and spatial relationships between bacteria and their hosts...
April 12, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28401904/intercalant-independent-transition-temperature-in-superconducting-black-phosphorus
#12
R Zhang, J Waters, A K Geim, I V Grigorieva
Research on black phosphorus has been experiencing a renaissance over the last years, after the demonstration that few-layer crystals exhibit high carrier mobility and a thickness-dependent bandgap. Black phosphorus is also known to be a superconductor under high pressure exceeding 10 GPa. The superconductivity is due to a structural transformation into another allotrope and accompanied by a semiconductor-metal transition. No superconductivity could be achieved for black phosphorus in its normal orthorhombic form, despite several reported attempts...
April 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28399656/teaching-old-dyes-new-tricks-biological-probes-built-from-fluoresceins-and-rhodamines
#13
Luke D Lavis
Small-molecule fluorophores, such as fluorescein and rhodamine derivatives, are critical tools in modern biochemical and biological research. The field of chemical dyes is old; colored molecules were first discovered in the 1800s, and the fluorescein and rhodamine scaffolds have been known for over a century. Nevertheless, there has been a renaissance in using these dyes to create tools for biochemistry and biology. The application of modern chemistry, biochemistry, molecular genetics, and optical physics to these old structures enables and drives the development of novel, sophisticated fluorescent dyes...
April 7, 2017: Annual Review of Biochemistry
https://www.readbyqxmd.com/read/28380490/renaissance-of-low-dose-radiotherapy-concepts-for-cutaneous-lymphomas
#14
Bouthaina Dabaja
No abstract text is available yet for this article.
April 6, 2017: Oncology Research and Treatment
https://www.readbyqxmd.com/read/28376317/imaginal-disc-regeneration-takes-flight
#15
REVIEW
Iswar K Hariharan, Florenci Serras
Drosophila imaginal discs, the larval precursors of adult structures such as the wing and leg, are capable of regenerating after damage. During the course of regeneration, discs can sometimes generate structures that are appropriate for a different type of disc, a phenomenon termed transdetermination. Until recently, these phenomena were studied by physically fragmenting discs and then transplanting them into the abdomens of adult female flies. This field has experienced a renaissance following the development of genetic ablation systems that can damage precisely defined regions of the disc without the need for surgery...
April 1, 2017: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/28357705/minocycline-for-the-treatment-of-multidrug-and-extensively-drug-resistant-a-baumannii-a-review
#16
REVIEW
Jennifer N Lashinsky, Oryan Henig, Jason M Pogue, Keith S Kaye
Acinetobacter baumannii can cause life-threatening nosocomial infections associated with high rates of morbidity and mortality. In recent years, the increasing number of infections due to extensively drug-resistant Acinetobacter with limited treatment options has resulted in a need for additional therapeutic agents, and a renaissance of older, neglected antimicrobials. This has led to an increased interest in the use of minocycline to treat these infections. Minocycline has been shown to overcome many resistance mechanisms affecting other tetracyclines in A...
March 29, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28356751/new-pharmacological-and-technological-management-strategies-in-heart-failure
#17
REVIEW
Sunit-Preet Chaudhry, Garrick C Stewart
Heart failure is a complex clinical syndrome resulting from impairment of ventricular filling or ejection of blood associated with symptoms of dyspnea, fatigue, as well as peripheral and/or pulmonary edema. This syndrome is progressive and characterized by worsening quality of life despite escalating levels of care, affecting 5.7 million Americans with an annual cost of over ≥30 billion US dollars. Treatment for this syndrome has evolved over three distinct eras: the nonpharmacological era, the pharmacological era, and the device era, with the focus shifting from symptomatic relief to decreasing morbidity and mortality...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/28351454/mechanistic-insights-into-gold-organometallic-compounds-and-their-biomedical-applications
#18
Sophie Jürgens, Angela Casini
The application of gold in medicine can be traced back several thousand years and Au(i) compounds have been used in the treatment of rheumatoid arthritis since the last century. Recently research into gold-based drugs for a number of human diseases has seen a renaissance due to their markedly different modes of action with respect to the classical platinum chemotherapeutic compounds. Within this research area, organometallic gold complexes have been particularly explored, mainly due to their higher stability in physiological conditions guaranteed by the presence of a direct Au-C bond...
March 29, 2017: Chimia
https://www.readbyqxmd.com/read/28345347/a-systematic-evaluation-of-the-n-f-bond-strength-of-electrophilic-n-f-reagents-hints-for-atomic-fluorine-donating-ability
#19
Jin-Dong Yang, Ya Wang, Xiao-Song Xue, Jin-Pei Cheng
The recent discovery of the radical reactivity of a few traditionally electrophilic N-F reagents has sparked a renaissance of radical fluorination. A knowledge of the N-F bond dissociation enthalpies (BDE) of electrophilic N-F reagents is essential for understanding of their reactivities. However, a thorough literature survey revealed that such information is extremely sparse. This prompted us to carry out the first systematic computation on the N-F BDEs of electrophilic N-F reagents. The calculated N-F BDE scale of 88 electrophilic N-F reagents ranges from 49...
April 3, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28344970/an-urgent-call-for-the-renaissance-of-the-world-health-organization-needed-now-more-than-ever-before
#20
Luchuo Engelbert Bain, Ikenna Desmond Ebuenyi
No abstract text is available yet for this article.
2017: Frontiers in Public Health
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