keyword
MENU ▼
Read by QxMD icon Read
search

pattern separation

keyword
https://www.readbyqxmd.com/read/28445851/development-and-validation-of-a-uhplc-esi-ms-ms-method-for-the-simultaneous-quantification-of-mammal-lysophosphatidylcholines-and-lysophosphatidylethanolamines-in-serum
#1
Susana Suárez-García, Lluís Arola, Aïda Pascual-Serrano, Anna Arola-Arnal, Gerard Aragonès, Cinta Bladé, Manuel Suárez
Recent investigations based on non-targeted metabolomics have proposed lysophospholipids (Lyso-PLs) as biomarkers of different diseases. In particular, lysophosphatidylcholines (Lyso-PCs) and lysophosphatidylethanolamines (Lyso-PEs) have been associated with serious lipid pathologies. Methods to determine the different molecular species in a biological sample and to quantify even less abundant species are required for the evaluation of the Lyso-PL pattern as a novel comprehensive biomarker of dyslipidemia. This study describes the development and validation of an ultra-high-performance liquid chromatography coupled to tandem mass spectrometry assay for the determination of a large number of Lyso-PCs and Lyso-PEs in biological samples...
April 18, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28445544/pressure-flaking-to-serrate-bifacial-points-for-the-hunt-during-the-mis5-at-sibudu-cave-south-africa
#2
Veerle Rots, Carol Lentfer, Viola C Schmid, Guillaume Porraz, Nicholas J Conard
Projectile technology is considered to appear early in the southern African Middle Stone Age (MSA) and the rich and high resolution MSA sequence of Sibudu Cave in KwaZulu-Natal has provided many new insights about the use and hafting of various projectile forms. We present the results of a functional and technological analysis on a series of unpublished serrated bifacial points recently recovered from the basal deposits of Sibudu Cave. These serrated tools, which only find equivalents in the neighbouring site of Umhlatuzana, precede the Still Bay techno-complex and are older than 77 ka BP...
2017: PloS One
https://www.readbyqxmd.com/read/28444795/systematics-and-molecular-phylogeny-of-the-ciliate-genus-pseudokeronopsis-ciliophora-hypotrichia
#3
Ju Li, Zifeng Zhan, Kuidong Xu
A still challenging study on ciliate systematics is to clarify the taxonomic and phylogenetic confusions of the fascinating pigmented Pseudokeronopsis species because of their high inter-specific similarities. We evaluated the identities and internal relationships within Pseudokeronopsis based on morphological descriptions in combination with the 18S and ITS-5.8S rDNA genetic distances, ITS2 secondary structures and phylogenetic analyses. Results showed that (1) Pseudokeronopsis pararubra, a species ever synonymized as Pseudokeronopsis carnea, is a valid species; (2) most Chinese populations identified as Pseudokeronopsis rubra represent a new species namely Pseudokeronopsis songi sp...
April 26, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28444200/the-mediterranean-the-cradle-of-anthoxanthum-poaceae-diploid-diversity
#4
Zuzana Chumová, Eliška Záveská, Terezie Mandáková, Karol Krak, Pavel Trávnícek
Background and Aims: Knowledge of diploid phylogeny and ecogeography provide a foundation for understanding plant evolutionary history, diversification patterns and taxonomy. The genus Anthoxanthum (vernal grasses, Poaceae) represents a taxonomically intricate polyploid complex with large phenotypic variation and poorly resolved evolutionary relationships. The aims of the study were to reveal: (1) evolutionary lineages of the diploid taxa and their genetic differentiation; (2) the past distribution of the rediscovered 'Mediterranean diploid'; and (3) possible migration routes of diploids in the Mediterranean...
April 21, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28443910/spin-state-variability-in-fe-2-complexes-of-substituted-2-pyridin-2-yl-1-10-phenanthroline-ligands-as-versatile-terpyridine-analogues
#5
Holm Petzold, Paul Djomgoue, Gerald Hörner, Silvio Heider, Charles Lochenie, Birgit Weber, Tobias Rüffer, Dieter Schaarschmidt
Fe(2+) spin crossover complexes [Fe(L)2](2+) (L = 2-(6-R(1)-pyridin-2-yl)-1,10-phenanthroline with R(1) = H, methoxy, bromo, -(1H-pyrazol-1-yl) or L = 2-(3-methoxy-pyridin-2-yl)-1,10-phenanthroline) were prepared. These air stable and durable complexes show SCO behaviour with very different transition temperatures T1/2 ranging from 130 K to 600 K depending on the substitution pattern. The use of (1)H NMR spectroscopy to elucidate the thermodynamics and kinetics of SCO in a solution of this series is described in detail...
April 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28442800/what-puts-them-at-risk-a-cross-sectional-case-control-survey-of-demographic-profile-and-sexual-behavior-of-patients-with-sexually-transmitted-infections-at-a-tertiary-care-center-in-north-india
#6
Rama Raj, Vishal Gupta, Mona Pathak, Vishnubhatla Sreenivas, Seema Sood, Sarman Singh, Kaushal K Verma, Neena Khanna, Bimal K Das, Somesh Gupta
BACKGROUND: Sexually transmitted infections (STIs) are a major public health problem in developing nations. Identification of risk factors can help in formulating effective strategies against them. The present study was conducted in a tertiary care hospital in North India over 1 year to identify the risk factors associated with STIs. MATERIALS AND METHODS: A questionnaire-based cross-sectional case-control survey was conducted where participants answered questions on demographic details, sexual behavior, and awareness of STIs...
January 2017: Indian Journal of Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28442709/evolutionary-history-of-the-extant-amphioxus-lineage-with-shallow-branching-diversification
#7
Takeshi Igawa, Masafumi Nozawa, Daichi G Suzuki, James D Reimer, Arseniy R Morov, Yiquan Wang, Yasuhisa Henmi, Kinya Yasui
Amphioxus or lancelets have been regarded as a key animal in understanding the origin of vertebrates. However, the evolutionary history within this lineage remains unexplored. As the amphioxus lineage has likely been separated from other chordates for a very long time and displays a marked left-right asymmetry, its evolutionary history is potentially helpful in better understanding chordate and vertebrate origins. We studied the phylogenetic relationships within the extant amphioxus lineage based on mitochondrial genomes incorporating new Asymmetron and Epigonichthys populations, and based on previously reported nuclear transcriptomes...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442514/cd3-and-cd20-immunohistochemical-staining-patterns-of-bone-marrow-infiltrating-malignant-lymphoma-cells
#8
Eun Jin Lee, Miyoung Kim, Han-Sung Kim, Hee Jung Kang, Hyo Jung Kim, Soo Kee Min, Young Kyung Lee
OBJECTIVES: It is known that CD3 and CD20 are homogenously expressed in T lineage and B lineage lymphoma, respectively; however, there are no standard guidelines to interpret immunohistochemistry findings. In this study, we investigated CD3 and CD20 immunohistochemical staining patterns of bone marrow (BM)-infiltrating lymphoma cells. METHODS: Among 297 patients diagnosed with malignant lymphoma, the BM biopsy slides of all 39 cases found to have BM infiltration (T lineage: 11; B lineage: 28) were reviewed...
March 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28441503/robust-uniform-and-highly-emissive-quantum-dot-polymer-films-and-patterns-using-thiol-ene-chemistry
#9
Markus Smith, Sidney T Malak, Jaehan Jung, Young Jun Yoon, Chun Hao Lin, Sunghan Kim, Kyung Min Lee, Ruilong Ma, Timothy J White, Timothy J Bunning, Zhiqun Lin, Vladimir V Tsukruk
This work demonstrates a facile and versatile method for generating low scattering crosslinked quantum dots (QD)-polymer composite films and patterned highly emissive structures with ultra-high QD loading, minimal phase-separation, and tunable mechanical properties. Uniform QD-polymer films are fabricated using thiol-ene chemistry, in which cross-linked polymer networks are rapidly produced in ambient conditions via fast UV polymerization in bulk to suppress QD aggregation. UV-controlled thiol-ene chemistry limits phase separation through producing highly QD loaded crosslinked composites with loading rate above majority of those reported in literature (<1%) and approaching 30%...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28441114/neural-circuitry-of-reward-prediction-error
#10
Mitsuko Watabe-Uchida, Neir Eshel, Naoshige Uchida
Dopamine neurons facilitate learning by calculating reward prediction error, or the difference between expected and actual reward. Despite two decades of research, it remains unclear how dopamine neurons make this calculation. Here we review studies that tackle this problem from a diverse set of approaches, from anatomy to electrophysiology to computational modeling and behavior. Several patterns emerge from this synthesis: that dopamine neurons themselves calculate reward prediction error, rather than inherit it passively from upstream regions; that they combine multiple separate and redundant inputs, which are themselves interconnected in a dense recurrent network; and that despite the complexity of inputs, the output from dopamine neurons is remarkably homogeneous and robust...
April 24, 2017: Annual Review of Neuroscience
https://www.readbyqxmd.com/read/28440903/triple-doped-monolayer-graphene-with-boron-nitrogen-aluminum-silicon-phosphorus-and-sulfur
#11
Pablo Andres Denis, Saif Ullah, Fernando Sato
We have investigated the structure, stability, electronic properties and chemical reactivity of X/B/N triple doped graphene systems, X= Al, Si, P and S, by means of density functional periodic calculations. For the triple doped graphene (TDG) systems studied the dopants prefer to be bonded instead of separated. In general, the XNB pattern is preferred, with the exception of sulfur which favors the SBN motif. The introduction of a third dopant results in a negligible decrease of the cohesive energies with respect to their dual doped graphene (DDG) counterparts...
April 25, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28439519/structured-illumination-diffuse-optical-tomography-for-noninvasive-functional-neuroimaging-in-mice
#12
Matthew D Reisman, Zachary E Markow, Adam Q Bauer, Joseph P Culver
Optical intrinsic signal (OIS) imaging has been a powerful tool for capturing functional brain hemodynamics in rodents. Recent wide field-of-view implementations of OIS have provided efficient maps of functional connectivity from spontaneous brain activity in mice. However, OIS requires scalp retraction and is limited to superficial cortical tissues. Diffuse optical tomography (DOT) techniques provide noninvasive imaging, but previous DOT systems for rodent neuroimaging have been limited either by sparse spatial sampling or by slow speed...
April 2017: Neurophotonics
https://www.readbyqxmd.com/read/28439463/molecular-assessment-of-the-fecal-microbiota-in-healthy-cats-and-dogs-before-and-during-supplementation-with-fructo-oligosaccharides-fos-and-inulin-using-high-throughput-454-pyrosequencing
#13
Jose F Garcia-Mazcorro, Jose R Barcenas-Walls, Jan S Suchodolski, Jörg M Steiner
Prebiotics are selectively fermentable dietary compounds that result in changes in the composition and/or activity of the intestinal microbiota, thus conferring benefits upon host health. In veterinary medicine, commercially available products containing prebiotics have not been well studied with regard to the changes they trigger on the composition of the gut microbiota. This study evaluated the effect of a commercially available nutraceutical containing fructo-oligosaccharides (FOS) and inulin on the fecal microbiota of healthy cats and dogs when administered for 16 days...
2017: PeerJ
https://www.readbyqxmd.com/read/28438166/adjacent-regenerative-peripheral-nerve-interfaces-produce-phase-antagonist-signals-during-voluntary-walking-in-rats
#14
Daniel Ursu, Andrej Nedic, Melanie Urbanchek, Paul Cederna, R Brent Gillespie
BACKGROUND: Regenerative Peripheral Nerve Interfaces (RPNIs) are neurotized muscle grafts intended to produce electromyographic signals suitable for motorized prosthesis control. Two RPNIs producing independent agonist/antagonist signals are required for each control axis; however, it is unknown whether signals from adjacent RPNIs are independent. The purpose of this work was to determine signaling characteristics from two adjacent RPNIs, the first neurotized by a foot dorsi-flexor nerve and the second neurotized by a foot plantar-flexor nerve in a rodent model...
April 24, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28437980/angle-resolved-transmission-through-metal-hole-gratings
#15
F Mariani, F de León-Pérez, K J A Vendel, L Martín-Moreno, M P Van Exter
We present the first angle resolved measurements of extraordinary optical transmission (EOT) through hole array gratings in a gold film. Varying the lattice spacing of the arrays and looking at higher diffraction orders, we retrieve the angular emission pattern of the constituent holes with better signal to noise ratio than with single-hole experiments. We present a method to determine separately the angular dependence of the direct and resonant contribution to EOT by using the spectral features of the diffraction orders together with an established model...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437577/high-gene-flow-despite-opposite-chirality-in-hybrid-zones-between-enantiomorphic-door-snails
#16
Eva L Koch, Marco T Neiber, Frank Walther, Bernhard Hausdorf
We studied differentiation and gene flow patterns between enantiomorphic door-snail species in two hybrid zones in the Bucegi Mountains (Romania) to investigate the effects of intrinsic barriers (complications in copulation) and extrinsic selection by environmental factors. A mitochondrial gene tree confirmed the historical separation of the examined populations into the dextral Alopia livida and the sinistral Alopia straminicollis in accordance with the morphological classification, but also indicated gene flow between the species...
April 24, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28437112/visualization-of-individual-images-in-patterned-organic-inorganic-multilayers-using-gisaxs-ct
#17
Hiroki Ogawa, Yukihiro Nishikawa, Mikihito Takenaka, Akihiko Fujiwara, Yohei Nakanishi, Yoshinobu Tsujii, Masaki Takata, Toshiji Kanaya
Using grazing-incidence small-angle scattering (GISAXS) with computed tomography (CT), we have reconstructed the spatial distribution of a thin gold (Au) layer buried under a thin poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) layer. Owing to the difference between total reflection angles of Au and PS-b-P2VP, the scattering profiles for Au nanoparticles and self-assembled nanostructures of PS-b-P2VP could be independently obtained by changing the X-ray angle of incidence. Reconstruction of scattering profiles allows to separately characterize spatial distributions in Au and PS-b-P2VP nanostructures...
April 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28437079/hierarchical-porous-polybenzimidazole-microsieves-an-efficient-architecture-for-anhydrous-proton-transport-via-polyionic-liquids
#18
Parashuram Kallem, Martin Drobek, Anne Julbe, Erik J Vriezekolk, Reyes Mallada, Maria Pilar Pina
Liquid-induced phase-separation micromolding (LIPSμM) has been successfully used for manufacturing hierarchical porous polybenzimidazole (HPBI) microsieves (42-46% porosity, 30-40 μm thick) with a specific pore architecture (pattern of macropores: ∼9 μm in size, perforated, dispersed in a porous matrix with a 50-100 nm pore size). Using these microsieves, proton-exchange membranes were fabricated by the infiltration of a 1H-3-vinylimidazolium bis(trifluoromethanesulfonyl)imide liquid and divinylbenzene (as a cross-linker), followed by in situ UV polymerization...
April 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28436876/deeply-learned-view-invariant-features-for-cross-view-action-recognition
#19
Yu Kong, Zhengming Ding, Jun Li, Yun Fu
Classifying human actions from varied views is challenging due to huge data variations in different views. The key to this problem is to learn discriminative view-invariant features robust to view variations. In this work, we address this problem by learning view-specific and view-shared features using novel deep models. View-specific features capture unique dynamics of each view while view-shared features encode common patterns across views. A novel sample-affinity matrix (SAM) is introduced in learning shared features, which accurately balances information transfer within the samples from multiple views and limits the transfer across samples...
April 24, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28436727/impact-of-switching-from-different-treatment-regimens-to-a-fixed-dose-combination-pill-polypill-in-patients-with-cardiovascular-disease-or-similarly-high-risk
#20
Melvin Lafeber, Wilko Spiering, Frank Lj Visseren, Diederick E Grobbee, Michiel L Bots, Alice Stanton, Anushka Patel, Dorairaj Prabhakaran, Ruth Webster, Simon Thom, Anthony Rodgers
Aims Cardiovascular fixed-dose combination pills, or polypills, may help address the widespread lack of access and adherence to proven medicines. Initiation of polypill-based care typically entails switching from current separately taken medications. Given the heterogeneity in usual care, there is interest in the impact of polypill treatment across different patterns of prior medication regimen. Methods A total of 2004 participants with established cardiovascular disease or estimated 5-year cardiovascular risk of over 15% were randomised to polypill-based treatment (aspirin 75 mg, simvastatin 40 mg, lisinopril 10 mg and either atenolol 50 mg or hydrochlorothiazide 12...
January 1, 2017: European Journal of Preventive Cardiology
keyword
keyword
109247
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"