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https://www.readbyqxmd.com/read/29051814/using-4-to-grade-near-normal-muscle-strength-does-not-improve-agreement
#1
Søren O'Neill, Sofie Louise Thomsen Jaszczak, Anne Katrine Søndergaard Steffensen, Birgit Debrabant
BACKGROUND: Manual assessment of muscle strength is often graded using the ordinal Medical Research Council (MRC) scale. The scale has a number of inherent weaknesses, including poorly defined limits between grades '4' and '5' and very large differences in the span of muscle strength encompassed by each of the six grades. It is not necessarily obvious how to convert a manual muscle test finding into an MRC grade. Several modifications which include intermediate grades have been suggested to improve the MRC scale and the current study examines whether agreement improves and variation in ratings decrease, with an intermediate grade between '4' and '5', in circumstances where such a grade would seem appropriate...
2017: Chiropractic & Manual Therapies
https://www.readbyqxmd.com/read/29051576/decreasing-bacillus-thuringiensis-israelensis-sensitivity-of-chironomus-riparius-larvae-with-age-indicates-potential-environmental-risk-for-mosquito-control
#2
Anna Kästel, Stefanie Allgeier, Carsten A Brühl
Mosquito control based on the use of Bacillus thuringiensis israelensis (Bti) is regarded as an environmental friendly method. However, Bti also affects non-target chironomid midges that are recognized as a central resource in wetland food webs. To evaluate the risk for different larval stages of Chironomus riparius we performed a test series of daily acute toxicity laboratory tests following OECD guideline 235 over the entire aquatic life cycle of 28 days. Our study is the first approach that performs an OECD approved test design with Bti and C...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29046831/self-assembly-of-chiral-fluorescent-nanoparticles-based-on-water-soluble-l-tryptophan-derivatives-of-p-tert-butylthiacalix-4-arene
#3
Pavel L Padnya, Irina A Khripunova, Olga A Mostovaya, Timur A Mukhametzyanov, Vladimir G Evtugyn, Vyacheslav V Vorobev, Yuri N Osin, Ivan I Stoikov
New water-soluble tetra-substituted derivatives of p-tert-butylthiacalix[4]arene containing fragments of L-tryptophan in cone and 1,3-alternate conformations were obtained. It was shown that the resulting compounds form stable, positively charged aggregates of 86-134 nm in diameter in water at a concentration of 1 × 10(-4) M as confirmed by dynamic light scattering, scanning electron microscopy and transmission electron microscopy. It was established that these aggregates are fluorescently active and chiral...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29046059/bis-dipyrrinato-zinc-ii-complex-chiroptical-wires-exfoliation-into-single-strands-and-intensification-of-circularly-polarized-luminescence
#4
Risa Aoki, Ryojun Toyoda, Julius Fritz Kögel, Ryota Sakamoto, Jatish Kumar, Yasutaka Kitagawa, Koji Harano, Tsuyoshi Kawai, Hiroshi Nishihara
One-dimensional (1D) coordination polymers (CPs) experiences severe limitations in exfoliation into individual strands, which hamper their utility as functional 1D nanomaterials. Here we demonstrate the synthesis of chiral 1D-CPs that feature the bis(dipyrrinato)zinc(II) complex motif. They can be exfoliated into single strands upon ultrasonication in organic media, retaining lengths of up to 3.19 μm (ca. 2600 monomer units). Their chiroptical structure allows the exfoliated wires to show circularly polarized luminescence at an intensity 5...
October 19, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29042448/myo-inositol-effects-in-women-with-pcos-a-meta-analysis-of-randomized-controlled-trials
#5
Vittorio Unfer, Fabio Facchinetti, Beatrice Orrù, Barbara Giordani, John Nestler
Myo-inositol (MI) supplementation in women with polycystic ovary syndrome (PCOS) has been evaluated over the last years. Many hormonal and reproductive impairments associated with this disorder seem relieved by the supplement. The objective of the meta-analysis was to assess the effects of MI alone or combined with d-chiro-inositol (DCI) on the endocrine and metabolic abnormalities of women with PCOS. Literature was retrieved from selected databases, MEDLINE, EMBASE, PubMed and Research Gate (up to November 2016)...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29042136/mercury-bioaccumulation-in-bats-reflects-dietary-connectivity-to-aquatic-food-webs
#6
Daniel J Becker, Matthew M Chumchal, Hugh G Broders, Jennifer M Korstian, Elizabeth L Clare, Thomas R Rainwater, Steven G Platt, Nancy B Simmons, M Brock Fenton
Mercury (Hg) is a persistent and widespread heavy metal with neurotoxic effects in wildlife. While bioaccumulation of Hg has historically been studied in aquatic food webs, terrestrial consumers can become contaminated with Hg when they feed on aquatic organisms (e.g., emergent aquatic insects, fish, and amphibians). However, the extent to which dietary connectivity to aquatic ecosystems can explain patterns of Hg bioaccumulation in terrestrial consumers has not been well studied. Bats (Order: Chiroptera) can serve as a model system for illuminating the trophic transfer of Hg given their high dietary diversity and foraging links to both aquatic and terrestrial food webs...
October 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29039937/concentration-independent-stereodynamic-g-probe-for-chiroptical-enantiomeric-excess-determination
#7
Paolo Zardi, Klaus Wurst, Giulia Licini, Cristiano Zonta
Enantiomeric excess determination is crucial in many aspects of science ranging from synthesis to materials. Within this subject, the use of molecular sensors coupled with chiroptical techniques is a straightforward approach to the stereochemical analysis of chiral molecules, especially in terms of process immediacy and labor. Ste-reodynamic probes typically consist of racemic mixtures of rapidly interconverting enantiomeric conformers able to recognize a chiral analyte and greatly amplify its chiroptical readout...
October 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29039681/complementary-and-alternative-medicine-services-in-the-military-health-system
#8
Patricia M Herman, Melony E Sorbero, Ann C Sims-Columbia
OBJECTIVES: Surveys of military personnel indicate substantial use of complementary and alternative medicine (CAM) that possibly exceeds use in the general U.S. POPULATION: Although military treatment facilities (MTFs) are known to offer CAM, surveys do not indicate where service members receive this care. This study offers a comprehensive system-wide accounting of the types of CAM offered across the military health system (MHS), the conditions for which it is used, and its level of use...
October 17, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/29039182/a-chiral-nanographene-propeller-embedding-six-enantiomerically-stable-5-helicene-units
#9
Veronika Berezhnaia, Myriam Roy, Nicolas Vanthuyne, Marco Villa, Jean-Valère Naubron, Jean Rodriguez, Yoann Coquerel, Marc Gingras
A one-step synthesis of a nanographene propeller with a D3-symmetry was obtained starting from 7,8-dibromo[5]helicene by Yamamoto nickel(0) couplings. It afforded a chiral polyaromatic hydrocarbon (PAH) embedding six enantiomerically stable [5]helicene units. This dense accumulation of helical strain resulted in an extremely distorted geometry, but stable stereochemistry. The conformational, structural, chiroptical and photophysical properties of the molecule are reported.
October 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29038996/combining-structural-probes-in-the-gas-phase-ion-mobility-resolved-action-fret
#10
Steven Daly, Luke MacAleese, Philippe Dugourd, Fabien Chirot
In the context of native mass spectrometry, the development of gas-phase structural probes sensitive to the different levels of structuration of biomolecular assemblies is necessary to push forward conformational studies. In this paper, we provide the first example of the combination of ion mobility (IM) and Förster resonance energy transfer (FRET) measurements within the same experimental setup. The possibility to obtain mass- and mobility-resolved FRET measurements is demonstrated on a model peptide and applied to monitor the collision-induced unfolding of ubiquitin...
October 16, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/29038870/chiropractic-care-and-risk-for-acute-lumbar-disc-herniation-a-population-based-self-controlled-case-series-study
#11
Cesar A Hincapié, George A Tomlinson, Pierre Côté, Y Raja Rampersaud, Alejandro R Jadad, J David Cassidy
PURPOSE: Chiropractic care is popular for low back pain, but may increase the risk for acute lumbar disc herniation (LDH). Low back pain is a common early (prodromal) symptom of LDH and commonly precedes LDH diagnosis. Our objective was to investigate the association between chiropractic care and acute LDH with early surgical intervention, and contrast this with the association between primary care physician (PCP) care and acute LDH with early surgery. METHODS: Using a self-controlled case series design and population-based healthcare databases in Ontario, Canada, we investigated all adults with acute LDH requiring emergency department (ED) visit and early surgical intervention from April 1994 to December 2004...
October 16, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29034908/author-s-response-to-letter-to-the-editor-cerebral-hemorrhage-following-chiropractic-activator-treatment-case-report-and-review-of-the-literature
#12
COMMENT
Fred L Cohen
No abstract text is available yet for this article.
October 2017: Journal of Neurological Surgery Reports
https://www.readbyqxmd.com/read/29034430/ultraviolet-filters-and-heat-shock-proteins-effects-in-chironomus-riparius-by-benzophenone-3-and-4-methylbenzylidene-camphor
#13
Raquel Martín-Folgar, Mónica Aquilino, Irene Ozáez, José-Luis Martínez-Guitarte
Benzophenone-3 (BP3) and 4-methylbenzylidene camphor (4MBC) are common ultraviolet filters (UV filters), compounds considered as emergent contaminants, used in different products like plastics and personal care products. The levels of these compounds are rising in the wild, but the effects they have on invertebrates are poorly understood. Chironomus riparius is a benthic insect widely used in toxicology, and several studies have been previously performed in our laboratory to determine the effects these compounds have on this organism at the molecular level...
October 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29032439/the-application-of-chironomid-pupal-exuvial-technique-cpet-for-ecological-analysis-in-a-neotropical-large-river-system
#14
A P Mestre, A C Paggi, L Montalto
This field ecological study, based on the chironomid pupal exuvial technique (CPET), is new for the Paraná River and proposes an efficient tool to be used in future ecological approaches and biomonitoring. Drifting of pupal exuviae in a river-floodplain system of the Middle Paraná River floodplain was represented by 34 Chironomidae taxa, being the characteristic association obtained from the CPET: Lopescladius, Onconeura, Paralauterborniella, Polypedilum, and Harnischia complex. Diversity, richness, dominance, total density, and density of dominant taxa were different between the longitudinal and lateral dimensions but not between hydrologic phases, with a greater diversity and richness in the main channel of the river and higher density and dominance in floodplain habitats...
October 14, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/29029606/patient-centered-professional-practice-models-for-managing-low-back-pain-in-older-adults-a-pilot-randomized-controlled-trial
#15
Christine M Goertz, Stacie A Salsbury, Cynthia R Long, Robert D Vining, Andrew A Andresen, Maria A Hondras, Kevin J Lyons, Lisa Z Killinger, Fredric D Wolinsky, Robert B Wallace
BACKGROUND: Low back pain is a debilitating condition for older adults, who may seek healthcare from multiple providers. Few studies have evaluated impacts of different healthcare delivery models on back pain outcomes in this population. The purpose of this study was to compare clinical outcomes of older adults receiving back pain treatment under 3 professional practice models that included primary medical care with or without chiropractic care. METHODS: We conducted a pilot randomized controlled trial with 131 community-dwelling, ambulatory older adults with subacute or chronic low back pain...
October 13, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/29027987/chromosomal-evolution-in-chiroptera
#16
REVIEW
Cibele G Sotero-Caio, Robert J Baker, Marianne Volleth
Chiroptera is the second largest order among mammals, with over 1300 species in 21 extant families. The group is extremely diverse in several aspects of its natural history, including dietary strategies, ecology, behavior and morphology. Bat genomes show ample chromosome diversity (from 2n = 14 to 62). As with other mammalian orders, Chiroptera is characterized by clades with low, moderate and extreme chromosomal change. In this article, we will discuss trends of karyotypic evolution within distinct bat lineages (especially Phyllostomidae, Hipposideridae and Rhinolophidae), focusing on two perspectives: evolution of genome architecture, modes of chromosomal evolution, and the use of chromosome data to resolve taxonomic problems...
October 13, 2017: Genes
https://www.readbyqxmd.com/read/29027546/letter-to-the-editor-cerebral-hemorrhage-following-chiropractic-activator-treatment-case-report-and-review-of-literature
#17
COMMENT
Michael A K Liebschner, Bruce L Ehni
No abstract text is available yet for this article.
October 2017: Journal of Neurological Surgery Reports
https://www.readbyqxmd.com/read/29027151/comparison-of-different-ion-mobility-setups-using-poly-ethylene-oxide-peo-polymers-drift-tube-tims-and-t-wave
#18
Jean R N Haler, Philippe Massonnet, Fabien Chirot, Christopher Kune, Clothilde Comby-Zerbino, Jan Jordens, Maarten Honing, Ynze Mengerink, Johann Far, Philippe Dugourd, Edwin De Pauw
Over the years, polymer analyses using ion mobility-mass spectrometry (IM-MS) measurements have been performed on different ion mobility spectrometry (IMS) setups. In order to be able to compare literature data taken on different IM(-MS) instruments, ion heating and ion temperature evaluations have already been explored. Nevertheless, extrapolations to other analytes are difficult and thus straightforward same-sample instrument comparisons seem to be the only reliable way to make sure that the different IM(-MS) setups do not greatly change the gas-phase behavior...
October 12, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/29024905/hantavirus-maintenance-and-transmission-in-reservoir-host-populations
#19
REVIEW
Kristian M Forbes, Tarja Sironen, Alexander Plyusnin
Hantaviruses are primarily hosted by mammalian species of the orders Rodentia, Eulipotyphla and Chiroptera. Spillover to humans is common, and understanding hantavirus maintenance and transmission in reservoir host populations is important for efforts to curtail human disease. Recent field research challenges traditional phases of virus shedding kinetics derived from laboratory rodent infection experiments. Organ infection sites in non-rodent hosts suggest similar transmission routes to rodents, but require direct assessment...
October 9, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/29022593/the-size-shape-density-and-ring-of-the-dwarf-planet-haumea-from-a-stellar-occultation
#20
J L Ortiz, P Santos-Sanz, B Sicardy, G Benedetti-Rossi, D Bérard, N Morales, R Duffard, F Braga-Ribas, U Hopp, C Ries, V Nascimbeni, F Marzari, V Granata, A Pál, C Kiss, T Pribulla, R Komžík, K Hornoch, P Pravec, P Bacci, M Maestripieri, L Nerli, L Mazzei, M Bachini, F Martinelli, G Succi, F Ciabattari, H Mikuz, A Carbognani, B Gaehrken, S Mottola, S Hellmich, F L Rommel, E Fernández-Valenzuela, A Campo Bagatin, S Cikota, A Cikota, J Lecacheux, R Vieira-Martins, J I B Camargo, M Assafin, F Colas, R Behrend, J Desmars, E Meza, A Alvarez-Candal, W Beisker, A R Gomes-Junior, B E Morgado, F Roques, F Vachier, J Berthier, T G Mueller, J M Madiedo, O Unsalan, E Sonbas, N Karaman, O Erece, D T Koseoglu, T Ozisik, S Kalkan, Y Guney, M S Niaei, O Satir, C Yesilyaprak, C Puskullu, A Kabas, O Demircan, J Alikakos, V Charmandaris, G Leto, J Ohlert, J M Christille, R Szakáts, A Takácsné Farkas, E Varga-Verebélyi, G Marton, A Marciniak, P Bartczak, T Santana-Ros, M Butkiewicz-Bąk, G Dudziński, V Alí-Lagoa, K Gazeas, L Tzouganatos, N Paschalis, V Tsamis, A Sánchez-Lavega, S Pérez-Hoyos, R Hueso, J C Guirado, V Peris, R Iglesias-Marzoa
Haumea-one of the four known trans-Neptunian dwarf planets-is a very elongated and rapidly rotating body. In contrast to other dwarf planets, its size, shape, albedo and density are not well constrained. The Centaur Chariklo was the first body other than a giant planet known to have a ring system, and the Centaur Chiron was later found to possess something similar to Chariklo's rings. Here we report observations from multiple Earth-based observatories of Haumea passing in front of a distant star (a multi-chord stellar occultation)...
October 11, 2017: Nature
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