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https://www.readbyqxmd.com/read/28448143/effect-directed-analysis-of-toxicants-in-sediment-with-combined-passive-dosing-and-in-vivo-toxicity-testing
#1
Hongxue Qi, Huizhen Li, Yanli Wei, W Tyler Mehler, Eddy Y Zeng, Jing You
Identifying key toxicants in sediment is a great challenge, particularly if non-target toxicants are involved. To identify the contaminants responsible for sediment toxicity to Chironomus dilutus in Guangzhou reach of the Pearl River in South China, passive dosing and in vivo toxicity testing were incorporated into effect-directed analysis (EDA) to account for bioavailability. Fractionation of sediment extracts was performed with gel permeation chromatography and reverse phase liquid chromatography sequentially...
April 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28448132/eu-iii-chiral-coordination-polymer-with-a-structural-transformation-system
#2
Naoyuki Koiso, Yuichi Kitagawa, Takayuki Nakanishi, Koji Fushimi, Yasuchika Hasegawa
A luminescent Eu(III) chiral coordination polymer with a structural transformation system, [Eu(hfa)3((R)-bidp)]n (hfa: haxafluoroacetylacetonato, (R)-bidp: (R)-1,1'-binaphthyl-2,2'-bis(diphenylphosphinate), is reported. Single-crystal X-ray analysis revealed a characteristic helical polymer structure of [Eu(hfa)3((R)-bidp)]n with hydrogen-fluorine/π interactions. [Eu(hfa)3((R)-bidp)]n shows high thermostability (decomposition temperature = 320 °C) and strong luminescence properties (the 4f-4f emission quantum yield = 76%) in the solid state due to its tight packing and asymmetric structure...
April 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28446374/emergency-practice-acute-low-back-pain-and-chiropractic-manipulation
#3
Benjamin W Friedman
No abstract text is available yet for this article.
April 21, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28442739/mixing-of-quantum-states-a-new-route-to-creating-optical-activity
#4
Anvar S Baimuratov, Nikita V Tepliakov, Yurii K Gun'ko, Alexander V Baranov, Anatoly V Fedorov, Ivan D Rukhlenko
The ability to induce optical activity in nanoparticles and dynamically control its strength is of great practical importance due to potential applications in various areas, including biochemistry, toxicology, and pharmaceutical science. Here we propose a new method of creating optical activity in originally achiral quantum nanostructures based on the mixing of their energy states of different parities. The mixing can be achieved by selective excitation of specific states or via perturbing all the states in a controllable fashion...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28440326/complex-multifractal-nature-in-mycobacterium-tuberculosis-genome
#5
Saurav Mandal, Tanmoy Roychowdhury, Keilash Chirom, Alok Bhattacharya, R K Brojen Singh
The mutifractal and long range correlation (C(r)) properties of strings, such as nucleotide sequence can be a useful parameter for identification of underlying patterns and variations. In this study C(r) and multifractal singularity function f(α) have been used to study variations in the genomes of a pathogenic bacteria Mycobacterium tuberculosis. Genomic sequences of M. tuberculosis isolates displayed significant variations in C(r) and f(α) reflecting inherent differences in sequences among isolates. M. tuberculosis isolates can be categorised into different subgroups based on sensitivity to drugs, these are DS (drug sensitive isolates), MDR (multi-drug resistant isolates) and XDR (extremely drug resistant isolates)...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28439556/selective-control-of-reconfigurable-chiral-plasmonic-metamolecules
#6
Anton Kuzyk, Maximilian J Urban, Andrea Idili, Francesco Ricci, Na Liu
Selective configuration control of plasmonic nanostructures using either top-down or bottom-up approaches has remained challenging in the field of active plasmonics. We demonstrate the realization of DNA-assembled reconfigurable plasmonic metamolecules, which can respond to a wide range of pH changes in a programmable manner. This programmability allows for selective reconfiguration of different plasmonic metamolecule species coexisting in solution through simple pH tuning. This approach enables discrimination of chiral plasmonic quasi-enantiomers and arbitrary tuning of chiroptical effects with unprecedented degrees of freedom...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28439405/the-start-back-tool-in-chiropractic-practice-a-narrative-review
#7
REVIEW
Yasmeen Khan
BACKGROUND: The Keele STarT Back Tool was designed for primary care medical physicians in the UK to determine the risk for persistent disabling pain in patients with musculoskeletal pain and to tailor treatments accordingly. In medical and physical therapy settings, STarT Back Tool's tailored care plans improved patients' low back pain outcomes and lowered costs. OBJECTIVE: Review studies using the STarT Back Tool in chiropractic patient populations. METHODS: PubMed, The Cochrane Library, Index to Chiropractic Literature, and Science Direct databases were searched...
2017: Chiropractic & Manual Therapies
https://www.readbyqxmd.com/read/28438274/the-effectiveness-of-acupuncture-acupressure-and-chiropractic-interventions-on-treatment-of-chronic-nonspecific-low-back-pain-in-iran-a-systematic-review-and-meta-analysis
#8
REVIEW
Mohsen Yeganeh, Hamid Reza Baradaran, Mostafa Qorbani, Yousef Moradi, Saeed Dastgiri
BACKGROUND: Low back pain (LBP) is one of the most common health problems in adults. The impact of LBP on the individual can cause loss of health status and function related to pain in the back. To reduce the impact of LBP on adults, drug therapy is the most frequently recommended intervention. But over the last decade, a substantial number of randomized clinical trials of non-pharmacological intervention for LBP have been published. OBJECTIVE: To determine the effectiveness of acupuncture, acupressure and chiropractic (non-pharmacological) interventions on the treatment of chronic nonspecific low back pain in Iran...
May 2017: Complementary Therapies in Clinical Practice
https://www.readbyqxmd.com/read/28435386/more-new-records-of-spider-wasps-from-colombia-hymenoptera-pompilidae
#9
Cecilia Waichert, Fernando Fernández, Valentina Castro-Huertas, Juanita Rodriguez, James P Pitts
Aporinellus Banks, Austrochares Banks and Dicranoplius Haupt are new generic records for Colombia, as well as the species Dipogon ariel Banks, Evagetes peruana Banks, and Euplaniceps notabilis (Smith). Five new combinations are formally endorsed: Aimatocare argentinica (Banks), comb. n.; Aimatocare longula (Banks), comb. n.; Aimatocare imitator (Evans), comb. n.; Aimatocare impensa (Evans), comb. n.; Aimatocare vitrea (Fox), comb. n. Although these names have been used in Pompilidae, no formal nomenclatural act had been proposed...
2017: ZooKeys
https://www.readbyqxmd.com/read/28435132/phylogenetic-position-of-the-rainbow-sardine-dussumieria-dussumieriidae-and-its-bearing-on-the-early-evolution-of-the-clupeoidei
#10
Sébastien Lavoué, Joris A M Bertrand, Wei-Jen Chen, Hsuan-Ching Hans Ho, Hiroyuki Motomura, Tetsuya Sado, Masaki Miya
The fish family Dussumieriidae (suborder Clupeoidei), commonly called round herrings, is traditionally considered to be a key taxon for understanding the evolution of the Clupeoidei because some of its morphological characteristics have been interpreted as being either derived or primitive, such as the nearly complete absence of abdominal scutes. Recent molecule-based studies showed that the Dussumieriidae is likely not a monophyletic group. None of those studies, however, included the genus Dussumieria (rainbow sardines) which is the type genus of the family Dussumieriidae...
April 20, 2017: Gene
https://www.readbyqxmd.com/read/28427725/association-of-mild-leg-length-discrepancy-and-degenerative-changes-in-the-hip-joint-and-lumbar-spine
#11
Kelvin J Murray, Tom Molyneux, Michael R Le Grande, Aurora Castro Mendez, Franz K Fuss, Michael F Azari
OBJECTIVE: The purpose of this study was to evaluate the correlation between mild leg length discrepancy (LLD) and degenerative joint disease (DJD) or osteoarthritis. METHODS: We evaluated standard postural lumbopelvic radiographs from 255 adults (121 women and 134 men) who had presented with spinal pain for chiropractic care. Symmetry of femoral head diameters was used to exclude magnification errors. Pearson's partial correlation was used to control for age and derive effect sizes for LLD on DJD in the hip and lower lumbar motion segments...
April 17, 2017: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/28426407/helminth-cestoda-nematoda-and-coccidian-apicomplexa-eimeriidae-parasites-of-the-eastern-small-footed-myotis-myotis-leibii-chiroptera-vespertilionidae-from-arkansas-with-a-description-of-a-new-species-of-eimeria
#12
Chris T McAllister, R Scott Seville, Charles R Bursey
During May and July 2016, 32 eastern small-footed myotis (Myotis leibii) were collected from five counties of northwestern Arkansas and their faeces examined for coccidian parasites. Four of 32 (13%) M. leibii harboured an eimerian that we describe here as new. Oocysts of Eimeria sassei sp. n. were ovoidal to ellipsoidal with a bi-layered wall and measured (length × width, L × W) 18.3 × 15.2 µm, with an L/W ratio of 1.2. A micropyle and oocyst residuum were absent but 1-2 polar granules were present. Sporocysts were ovoidal, 9...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28426196/chiral-inorganic-nanostructures
#13
Wei Ma, Liguang Xu, André F de Moura, Xiaoling Wu, Hua Kuang, Chuanlai Xu, Nicholas A Kotov
The field of chiral inorganic nanostructures is rapidly expanding. It started from the observation of strong circular dichroism during the synthesis of simple nanoparticles (NPs) and their assemblies mediated by biomolecules and expanded to sophisticated synthetic protocols involving nanostructures from metals, semiconductors, ceramics, and nanocarbons. Besides the well-established chirality transfer from bioorganic molecules, other methods to impart handedness to nanoscale matter specific to inorganic materials were discovered, including three-dimentional lithography, multiphoton chirality transfer, polarization effects in nanoscale assemblies, and others...
April 20, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28426156/natural-terpene-derivatives-as-new-structural-task-specific-ionic-liquids-to-enhance-the-enantiorecognition-of-acidic-enantiomers-on-teicoplanin-based-stationary-phase-by-high-performance-liquid-chromatography
#14
Jolanta Flieger, Joanna Feder-Kubis, Małgorzata Tatarczak-Michalewska, Anita Płazińska, Anna Madejska, Marta Swatko-Ossor
We present the specific cooperative effect of a semisynthetic glycopeptide antibiotic teicoplanin and chiral ionic liquids containing the (1R,2S,5R)-(-)-menthol moiety on the chiral recognition of enantiomers of mandelic acid, vanilmandelic acid and phenyllactic acid. Experiments were performed chromatographically on an Astec Chirobiotic T chiral stationary phase applying the mobile phase with the addition of the chiral ionic liquids. The stereoselective binding of enantiomers to teicoplanin in presence of new chiral ionic liquids were evaluated applying thermodynamic measurements and the docking simulations...
April 20, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28426068/amplification-of-the-molecular-chiroptical-effect-by-low-loss-dielectric-nanoantennas
#15
Weixuan Zhang, Tong Wu, Rongyao Wang, Xiangdong Zhang
We report here the chiroptical amplification effect occurring in the hybrid systems consisting of chiral molecules and Si nanostructures. Under resonant excitation of circularly polarized light, the hybrid systems show strong CD induction signals at the optical frequency, which arise from both the electric and magnetic responses of the Si nanostructures. More interestingly, the induced CD signals from Si-based dielectric nanoantennas are always larger than that from Au-based plasmonic counterparts. The related physical origin was disclosed...
April 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28426054/syntheses-structures-and-chiroptical-and-magnetic-properties-of-chiral-clusters-built-from-schiff-bases-a-novel-mn-ii-mnna-core
#16
A Escuer, J Mayans, M Font-Bardia, M Górecki, L Di Bari
Chiral clusters with Mn(II)MnNa(I) and the new Mn(II)MnNa cores have been synthesised employing enantiomerically pure Schiff bases and halide ligands. The new compounds have been characterized by electronic circular dichroism (ECD) and magnetic susceptibility.
April 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28423423/invertebrates-fungal-biomass-and-leaf-breakdown-in-pools-and-riffles-of-neotropical-streams
#17
Renato Tavares Martins, Lidimara Souza da Silveira, Marcos Pereira Lopes, Roberto Gama Alves
We evaluated fungal biomass (as ergosterol concentration) and invertebrate colonization during leaf breakdown of Picramnia sellowii Planch. (Picramniaceae) in pools and riffles of three low-order forested streams in southeastern Brazil. We hypothesized that leaf breakdown will be higher in riffles due to the high physical fragmentation and fungal activity. The experiment was carried out during the dry season of 2012, using 108 litter bags, each containing 3 ± 0.05 g of air-dried leaves. After 7, 15, 30, 60, 90, and 120 d of incubation, six litter bags (riffle = 3 and pool = 3) were removed from each stream...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28423005/an-archosauromorph-dominated-ichnoassemblage-in-fluvial-settings-from-the-late-early-triassic-of-the-catalan-pyrenees-ne-iberian-peninsula
#18
Eudald Mujal, Josep Fortuny, Arnau Bolet, Oriol Oms, José Ángel López
The vertebrate recovery after the end-Permian mass extinction can be approached through the ichnological record, which is much more abundant than body fossils. The late Olenekian (Early Triassic) tetrapod ichnoassemblage of the Catalan Pyrenean Basin is the most complete and diverse of this age from Western Tethys. This extensional basin, composed of several depocenters, was formed in the latest phases of the Variscan orogeny (Pangea breakup) and was infilled by braided and meandering fluvial systems of the red-beds Buntsandstein facies...
2017: PloS One
https://www.readbyqxmd.com/read/28422447/lc-ms-ms-and-chiroptical-spectroscopic-analyses-of-multidimensional-metabolic-systems-of-chiral-thalidomide-and-its-derivatives
#19
Yoshiyuki Ogino, Masahito Tanaka, Togo Shimozawa, Toru Asahi
Enantiomeric thalidomide undergoes various kinds of biotransformations including chiral inversion, hydrolysis, and enzymatic oxidation, which results in several metabolites, thereby adding to the complexity in the understanding of the nature of thalidomide. To decipher this complexity, we analyzed the multidimensional metabolic reaction networks of thalidomide and related molecules in vitro. Characteristic patterns in the amount of various metabolites of thalidomide and related molecules generated during a combination of chiral inversion, hydrolysis, and hydroxylation were observed using liquid chromatography-tandem mass spectrometry and chiroptical spectroscopy...
April 19, 2017: Chirality
https://www.readbyqxmd.com/read/28420356/an-assessment-of-the-hiv-tb-knowledge-and-skills-of-home-based-carers-working-in-the-north-west-province-in-south-africa-a-cross-sectional-study
#20
Justin G Engelbrecht, Mabjala R Letsoalo, Admire C Chirowodza
BACKGROUND: Home-based carers (HBCs) play a critical role in ensuring the success of the primary health care re-engineering strategy in South Africa. Their role includes ensuring improved access to and delivery of primary health care at the household level, and better co-ordination and improved linkages between community and health facilities for HIV/TB services. The objective of this study was to assess the knowledge, skills, challenges and training needs of HBCs involved in HIV/TB care in one sub-district in the North-West province of South Africa...
April 19, 2017: BMC Health Services Research
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