keyword
MENU ▼
Read by QxMD icon Read
search

structured reporting

keyword
https://www.readbyqxmd.com/read/28738662/highly-efficient-enrichment-of-low-abundance-intact-proteins-by-core-shell-structured-fe3o4-chitosan-graphene-composites
#1
Peng Zhang, Xiaoni Fang, Guoquan Yan, Mingxia Gao, Xiangmin Zhang
In proteomics research, the screening and monitoring of disease biomarkers is still a major challenge, mainly due to their low concentration in biological samples. However, the universal enrichment of intact proteins has not been further studied. In this work, we developed a Fe3O4-chitosan@graphene (Fe3O4-CS@G) core-shell composite to enrich low-abundance proteins from biological samples. Fe3O4-CS@G composite holds chitosan layer decorated Fe3O4 core, which improves the hydrophilicity of materials greatly. Meanwhile, the graphene nanosheets shell formed via electrostatic assembly endows the composite with huge surface area (178m(2)/g)...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738627/a-novel-ph-probe-based-on-ratiometric-fluorescent-properties-of-dicyanomethylene-4h-chromene-platform
#2
Xiaolei Liu, Jixun Han, Yan Zhang, Xiaofeng Yang, Yu Cui, Guoxin Sun
We report here a ratiometric pH probe (Z)-2-(2-(2-(4-hydroxyphenyl)-2-(pyrrolidin-1-yl)vinyl) -4H-chromen-4-ylidene)-malononitrile over the pH range of 2.44-6.00. It was synthesized by Knoevenagel Reaction from dicyanomethylene-4H-chromene and pyrrolidine. This is the first example of pyrrolidine as a part of the product structure in Knoevenagel condensation. High selectivity and sensitivity for pH variation were observed with significant fluorescent ratiometric responses and a remarkable Stokes shift (about 138nm)...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738583/application-of-headspace-and-direct-immersion-solid-phase-microextraction-in-the-analysis-of-organothiophosphates-related-to-the-chemical-weapons-convention-from-water-and-complex-matrices
#3
Marc André Althoff, Andreas Bertsch, Manfred Metzulat, Thomas M Klapötke, Konstantin L Karaghiosoff
The successful application of headspace (HS) and direct immersion (DI) solid phase microextraction (SPME) for the unambiguous identification and characterization of a series of toxic thiophosphate esters, such as Amiton (I), from aqueous phases and complex matrices (e.g. grass and foliage) has been demonstrated. A Thermo Scientific gas chromatograph (GC) - tandem mass spectrometer (MS/MS) system with a TriPlus RSH® autosampler and a SPME tool was used to investigate the effect of different parameters that influence the extraction efficiency: e...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738264/evidence-of-anomalous-behavior-of-intermolecular-interactions-at-low-concentration-of-methanol-in-ethanol-methanol-binary-system
#4
K Nilavarasi, Thejus R Kartha, V Madhurima
At low concentrations of methanol in a binary system of ethanol and methanol, uniquely complex molecular interactions are reported here. Previous studies indicate that ethanol molecules form aggregates held together by hydrogen bonding (O-H-O) and also dispersive forces. Addition of small amount of methanol tends to break the hydrogen bond network of ethanol due to the larger polarity of methanol. This leads to the ethanol molecules becoming somewhat isolated from each other within a scaffolding network of methanol molecules, as seen from the present molecular dynamics simulations...
July 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28738257/a-systematic-review-of-the-quality-of-statistical-methods-employed-for-analysing-quality-of-life-data-in-cancer-randomised-controlled-trials
#5
REVIEW
Jean-Francois Hamel, Patrick Saulnier, Madeline Pe, Efstathios Zikos, Jammbe Musoro, Corneel Coens, Andrew Bottomley
AIMS: Over the last decades, Health-related Quality of Life (HRQoL) end-points have become an important outcome of the randomised controlled trials (RCTs). HRQoL methodology in RCTs has improved following international consensus recommendations. However, no international recommendations exist concerning the statistical analysis of such data. The aim of our study was to identify and characterise the quality of the statistical methods commonly used for analysing HRQoL data in cancer RCTs...
July 21, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28738242/specialized-metabolites-from-the-aerial-parts-of-centaurea-polyclada-dc
#6
Serdar Demir, Canan Karaalp, Erdal Bedir
The genus Centaurea L. (Asteraceae) is represented by 200 taxa in the flora of Turkey and several Centaurea species are used as herbal remedies against different conditions. Previous phytochemical investigations on this genus generally revealed the isolation of sesquiterpene lactones and flavonoid derivatives. In our continuous search on Centaurea genus, a phytochemical study was performed on Centaurea polyclada DC., an endemic of West Anatolia. Previously undescribed two sesquiterpene-amino acid conjugates, an elemane and an eudesmane derivative were isolated from the aerial parts of Centaurea polyclada, together with eight known compounds; two elemane derivatives, three flavonoids, a lignan, a phenolic glucoside and a phenylpropanoid glucoside...
July 21, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28738227/rapid-and-reliable-determination-of-p-nitroaniline-in-wastewater-by-molecularly-imprinted-fluorescent-polymeric-ionic-liquid-microspheres
#7
Xing Lu, Yiwen Yang, Yanbo Zeng, Lei Li, Xiaohua Wu
Rapid and efficient detecting trace amount of environmental p-nitroaniline (p-NA) is in urgent need for security concerns and pollution supervision. In this work we report the use of molecularly imprinted polymeric ionic liquid (MIPIL) microspheres to construct recognizable surfaces for detection of p-NA through fluorescence quenching. The p-NA imprinted microspheres are synthesized by precipitation polymerization upon co-polymerization of 3-(anthracen-9-ylmethyl)-1-vinyl-1H-imidazol-3-ium chloride (Fluorescent IL monomer) with ethyleneglycol dimethacrylate (EGDMA)...
July 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28738135/development-of-a-shortened-version-of-the-spatial-hearing-questionnaire-shq-s-for-screening-spatial-hearing-ability
#8
Hua Ou, Ann Perreau, Richard Tyler
Purpose: The Spatial Hearing Questionnaire (SHQ) was developed to address how to measure spatial-hearing ability in complex listening situations (Tyler, Perreau, & Ji, 2009). It has been translated and validated into various languages, including Chinese, Dutch, French, and Persian. Although the SHQ contains only 24 items, it could be time-consuming in a busy clinic to administer. The purposes of this study were to develop and validate a shortened version of the SHQ (SHQ-S) and to compare self-perceived spatial-hearing ability across adults with normal hearing (NH), hearing loss (HL), and cochlear implants (CIs)...
July 24, 2017: American Journal of Audiology
https://www.readbyqxmd.com/read/28738105/psychosocial-and-behavioral-aspects-of-pain-and-perception-of-oral-health
#9
Miriane Lucindo Zucoloto, João Maroco, Juliana Alvares Campos
AIMS: To evaluate the contribution of the psychosocial and behavioral aspects of pain to the perception of oral health in a sample of Brazilian dental patients. METHODS: This cross-sectional study involved 436 patients who sought dental care in the School of Dentistry of São Paulo State University and who reported some type of orofacial pain. The study group's mean age (± standard deviation [SD]) was 39.9 ± 13.6 years, and the sample was 74.5% female. The Portuguese version of the Oral Health Impact Profile Short Form (OHIP-14) and the Multidimensional Pain Inventory (MPI) were used...
July 2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/28738098/somatization-disorder-and-somatoform-symptoms-in-systematically-studied-survivors-of-10-disasters
#10
Gus Zhang, Carol S North
BACKGROUND: There is little agreement about the association of somatization with exposure to disaster trauma in the existing literature. METHODS: Pre-disaster and post-disaster psychiatric disorders, somatization disorder, and individual somatoform (medically unexplained) symptoms were assessed with structured diagnostic interviews in 811 directly exposed survivors of 10 disasters. RESULTS: Only 1 individual met criteria for post-disaster somatization disorder; there were no incident cases...
August 1, 2017: Annals of Clinical Psychiatry: Official Journal of the American Academy of Clinical Psychiatrists
https://www.readbyqxmd.com/read/28738095/a-clinically-useful-screen-for-attention-deficit-hyperactivity-disorder-in-adult-psychiatric-outpatients
#11
Mark Zimmerman, Eugenia Gorlin, Kristy Dalrymple, Iwona Chelminiski
BACKGROUND: Attention-deficit/hyperactivity disorder (ADHD) is a serious illness that is frequently underdiagnosed in adults. The goal of this report from the Rhode Island Methods to Improve Diagnostic Assessment and Services project was to determine if it was possible to identify 1 or 2 ADHD criteria that could serve as "gate" criteria to screen for the disorder. METHODS: Psychiatric outpatients (N = 1,134) were evaluated using a semi-structured diagnostic interview for DSM-IV criteria of ADHD...
August 1, 2017: Annals of Clinical Psychiatry: Official Journal of the American Academy of Clinical Psychiatrists
https://www.readbyqxmd.com/read/28737946/structure-guided-optimization-of-hiv-integrase-strand-transfer-inhibitors
#12
Xue Zhi Zhao, Steven J Smith, Daniel P Maskell, Mathieu Métifiot, Valerie E Pye, Katherine Fesen, Christophe Marchand, Yves Pommier, Peter Cherepanov, Stephen H Hughes, Terrence R Burke
Integrase mutations can reduce effectiveness of the first-generation FDA-approved integrase strand transfer inhibitors (INSTIs), raltegravir (RAL) and elvitegravir (EVG). The second-generation agent, dolutegravir (DTG) has enjoyed considerable clinical success; however, resistance-causing mutations that diminish the efficacy of DTG have appeared. Our current findings support and extend the substrate envelope concept that broadly effective INSTIs can be designed by filling the envelope defined by the DNA substrates...
July 24, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28737939/several-gd-m-heterometal-organic-frameworks-with-gdn-as-nodes-tunable-structures-and-magnetocaloric-effect
#13
Peng-Fei Shi, Chun-Shuai Cao, Chu-Ming Wang, Bin Zhao
Tunable structures and magnetocaloric effect (MCE) of seven MOFs with [Gdn] as nodes are explored. The [Gdn] node is realized from mononuclear [Gd] to binuclear paddle-wheel [Gd2], tetranuclear tetrahedral [Gd4], and pentanuclear trigonal bipyramidal [Gd5]. Meanwhile, the magnetic entropy changes from 19.4 to 46.0 J·kg(-1)·K(-1). The results reveal that the effect of magnetic density on MCE plays a dominant role for Gd(3+)-based compounds, and high spin ground state of Mn(2+) (S = 5/2) is more favorable to achieve high MCE than that with Zn(2+), Co(2+), and Ni(2+) (Co(2+), S = 3/2; Ni(2+), S = 1)...
July 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28737931/semi-ordered-hierarchical-metallic-network-for-fast-and-large-charge-induced-strain
#14
Chuan Cheng, Lukas Lührs, Tobias Krekeler, Martin Ritter, Jörg Weissmüller
Nanoporous metallic actuators for artificial muscle applications are distinguished by combining the low operating voltage which is otherwise reserved for polymer-based actuators with interesting values of strain amplitude, strength and stiffness that are comparable of those of piezoceramics. We report a nanoporous metal actuator with enhanced strain amplitude and accelerated switching. Our 3D macroscopic metallic muscle has semi-ordered and hierarchical nanoporous structure, in which µm-sized tubes align perpendicular with the sample surface, while nm-sized ligaments consist of the tube walls...
July 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28737905/metabolism-of-t-2-toxin-in-farm-animals-and-human-in-vitro-and-in-chickens-in-vivo-using-ultra-high-performance-liquid-chromatography-quadrupole-time-of-flight-hybrid-mass-spectrometry-along-with-online-hydrogen-deuterium-exchange-technique
#15
Shupeng Yang, Marthe De Boevre, Huiyan Zhang, Karl De Ruyck, Feifei Sun, Jinzhen Zhang, Yue Jin, Yanshen Li, Zhanhui Wang, Suxia Zhang, Jinhui Zhou, Yi Li, Sarah De Saeger
After incubated with animals' and human liver microsomes, metabolites of phase I and II were investigated. A comparison was performed by ultrahigh performance liquid chromatography-quadrupole/time-of-flight coupled to mass spectrometry (UHPLC-Q/TOF). Consequently, a total of four phase I metabolites and three glucuronide binding metabolites of T-2 toxin were discovered. Although a significant metabolic difference was observed among six species, HT-2 toxin was the major product in all species. In addition, the in vivo metabolism of T-2 toxin after oral administration was also investigated in chickens, In total, 18 metabolites were detected, of which 13 were novel, to our knowledge, and reported for the first time...
July 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28737888/discovery-of-novel-proline-based-neuropeptide-ff-receptor-antagonists
#16
Thuy Nguyen, Ann M Decker, Tiffany L Langston, Kelly M Mathews, Justin N Siemian, Jun-Xu Li, Danni L Harris, Scott P Runyon, Yanan Zhang
The neuropeptide FF (NPFF) system has been implicated in a number of physiological processes including modulating the pharmacological activity of opioid analgesics and several other classes of drugs of abuse. In this study, we report the discovery of a novel proline scaffold with antagonistic activity at the NPFF receptors through a high throughput screening campaign using a functional calcium mobilization assay. Focused structure-activity relationship studies on the initial hit 1 have resulted in several analogs with calcium mobilization potencies in the submicromolar range and modest selectivity for the NPFF1 receptor...
July 24, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28737875/-intestinal-cystic-duplication-case-report
#17
Ana Herranz Barbero, Jordi Prat Ortells, M Elena Muñoz Fernández, Montserrat Castañón García-Alix, Josep Figueras Aloy
Intestinal cystic duplications are rare congenital anomalies, with an estimated incidence of approximately 1:4500 autopsies. The etiopathogenesis is uncertain. These duplications are cystic, tubular or diverticular structures lined with gastrointestinal mucosa. They share a common smooth muscle wall with the gastrointestinal tract but usually their lumens do not communicate with each other. Gastric duplication cysts represent 7-9% of the gastrointestinal tract duplication. They can be diagnosed prenatally by fetal ultrasound; magnetic resonance imaging characterizes the cyst and excludes other malformations...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28737819/insertion-reactions-of-small-unsaturated-molecules-in-the-n-b-bonds-of-boron-guanidinates
#18
Alberto Ramos, Antonio Antiñolo, Fernando Carrillo-Hermosilla, Rafael Fernández-Galán, María Del Pilar Montero-Rama, Elena Villaseñor, Antonio Rodríguez-Diéguez, Daniel García-Vivó
We report here 1,1- and 1,2-insertion reactions of small unsaturated molecules in the N-B bonds of two boron guanidinates, (Me2N)C(N(i)Pr)2BCy2 (1) and {(i)Pr(H)N}C(N(i)Pr){N(p-(t)Bu-C6H4)}BCy2 (2), and two bisboron guanidinates(2-), {(i)Pr(BCy2)N}C(N(i)Pr){N(p-(t)Bu-C6H4)}BCy2 (3) and {(i)Pr(C8H14B)N}C(N(i)Pr){N(p-Me-C6H4)}BC8H14 (4), the latter being prepared for the first time by double deprotonation of the corresponding guanidine with the 9-borabicyclo[3.3.1]nonane dimer, (H-BC8H14)2. Compounds 1-4 easily insert aromatic isonitriles, XylNC (Xyl = 2,6-Me2-C6H3) and (p-MeO-C6H4)NC, to give the expected diazaboroles 5-12, some of them being structurally characterised by X-ray diffraction...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737810/ionic-diffusion-and-proton-transfer-in-aqueous-solutions-of-alkali-metal-salts
#19
Giuseppe Cassone, Fabrizio Creazzo, Paolo V Giaquinta, Jiri Sponer, Franz Saija
We report on a series of ab initio molecular dynamics investigations on LiCl, NaCl, and KCl aqueous solutions under the effect of static electric fields. We have found that although in low-to-moderate field intensity regimes the well-known sequence of cationic mobilities μ(K(+)) > μ(Na(+)) > μ(Li(+)) (i.e., the bigger the cation the higher the mobility) is recovered, from intense field strengths this intuitive rule is no longer verified. In fact, field-induced water molecular dissociations lead to more complex phenomena regulating the standard migration properties of the simplest monovalent cations...
July 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28737797/cation-distribution-dependent-magnetic-properties-in-cocr2-xfexo4-x-0-1-to-0-5-exafs-m%C3%A3-ssbauer-and-magnetic-measurements
#20
D Kumar, A Banerjee, A Mahmoud, Chandana Rath
In this report, we have examined the evolution of the structure and rich magnetic transitions such as a paramagnetic to ferrimagnetic phase transition at the Curie temperature (TC), spiral ordering temperature (TS) and lock-in temperature (TL) observed in the CoCr2O4 spinel multiferroic after substituting Fe. The crystal structure, microstructure and cation distribution among the tetrahedral (A) and octahedral (B) sites in the spinel lattice are characterised by X-ray diffraction, transmission electron microscopy, Extended X-ray Absorption Fine Structure (EXAFS) and Mössbauer spectroscopy...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
keyword
keyword
76469
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"