keyword
MENU ▼
Read by QxMD icon Read
search

sensitive detection

keyword
https://www.readbyqxmd.com/read/29232752/simultaneous-determination-of-rosuvastatin-rosuvastatin-5%C3%A2-s-lactone-and-n-desmethyl-rosuvastatin-in-human-plasma-by-uplc-ms-ms-and-its-application-to-clinical-study
#1
Xue Bai, Xi-Pei Wang, Guo-Dong He, Bin Zhang, Min Huang, Jia-Li Li, Shi-Long Zhong
Objective A rapid and sensitive ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) assay was developed and validated for the simultaneous quantification of rosuvastatin (RST), rosuvastatin-5 S-lactone (RSTL), and N-desmethyl rosuvastatin (DM-RST) in human plasma. Methods Sample was prepared by liquid-liquid extraction with ethyl acetate from 100 μL acidulated buffered plasma. Then analytes were chromatographically separated using an Acquity UPLC HSS T3 column (3.0 mm×100 mm, 1...
December 12, 2017: Drug Research
https://www.readbyqxmd.com/read/29232713/long-disordered-regions-of-the-c-terminal-domain-of-abelson-tyrosine-kinase-have-specific-and-additive-functions-in-regulation-and-axon-localization
#2
Han S J Cheong, Mark F A VanBerkum
Abelson tyrosine kinase (Abl) is a key regulator of actin-related morphogenetic processes including axon guidance, where it functions downstream of several guidance receptors. While the long C-terminal domain (CTD) of Abl is required for function, its role is poorly understood. Here, a battery of mutants of Drosophila Abl was created that systematically deleted large segments of the CTD from Abl or added them back to the N-terminus alone. The functionality of these Abl transgenes was assessed through rescue of axon guidance defects and adult lethality in Abl loss-of-function, as well as through gain-of-function effects in sensitized slit or frazzled backgrounds that perturb midline guidance in the Drosophila embryonic nerve cord...
2017: PloS One
https://www.readbyqxmd.com/read/29232619/engineering-of-protein-nanopores-for-sequencing-chemical-or-protein-sensing-and-disease-diagnosis
#3
REVIEW
Shaoying Wang, Zhengyi Zhao, Farzin Haque, Peixuan Guo
Biological systems contain highly-ordered structures performing diverse functions. The elegant structures of biomachines have inspired the development of nanopores as single molecule sensors. Over the years, the utility of nanopores for detecting a wide variety of analytes have rapidly emerged for sensing, sequencing and diagnostic applications. Several protein channels with diverse shapes and sizes, such as motor channels from bacteriophage Phi29, SPP1, T3, and T4, as well as α-hemolysin, MspA, aerolysin, FluA, OmpF/G, CsgG, ClyA, have been continually investigated and developed as nanopores...
December 9, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/29232606/microwave-assisted-synthesis-for-a2e-and-development-of-lc-esi-ms-method-for-quantification-of-ocular-bisretinoids-in-human-retina
#4
A Kotnala, S Senthilkumari, N Halder, A Kumar, T Velpandian
PURPOSE: To develop a microwave assisted method for the rapid synthesis of A2E and also to develop a method to quantify N-retinylidene-N-retinylethanolamine(A2E), all-trans retinal dimer (ATRD), A2-glycerophospho ethanolamine (A2GPE), dihydropyridine phosphatidyl ethanolamine (A2DHPE) and monofuran A2E (MFA2E) in age matched retina. METHODS: The development of microwave assisted synthesis of A2E, its purification and characterization for its utility in quantification in human retina...
November 26, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29232518/theoretical-study-on-the-photoinduced-electron-transfer-mechanisms-of-different-peroxynitrite-probes
#5
Li Li, Minghui Zan, Xingwang Qie, Juan Yue, Peng Miao, Mingfeng Ge, Zhimin Chang, Zheng Wang, Fuquan Bai, Hong-Xing Zhang, James Kit Ferri, Wen-Fei Dong
The development of probes for rapid and selective detection of peroxynitrite in vivo is of great importance in biological science. We investigate different photoinduced electron transfer (PET) processes of two generations of peroxynitrite probes. Each has fluorescein and phenol moieties; one is conjugated by an ether linkage while the other is conjugated via an amine linkage. Using theoretical calculations, we demonstrated that the PET in the probe with an ether linkage occurs from the benzoic acid to the xanthene moiety...
December 12, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29232492/use-of-split-free-nlc-ms-hrms-interface-to-improve-the-detection-of-%C3%AE-cobratoxin-in-equine-plasma-for-doping-control
#6
Ludovic Bailly-Chouriberry, Patrice Garcia, Florence Cormant, Benoit Loup, Marie-Agnès Popot, Yves Bonnaire
Cobra (Naja naja kaouthia) venom contains a toxin called α-cobratoxin (α-Cbtx) containing 71 amino acids (MW 7821 Da) with a reported analgesic power greater than morphine. In 2013, the first analytical method for the detection of α-Cbtx in equine plasma was developed by Bailly-Chouriberry et al. allowing the confirmation of the presence of α-Cbtx at low concentrations (1-5 ng/mL or 130-640 fmol/mL) in plasma samples. In order to increase the method sensitivity and therefore to improve the detection of α-Cbtx in post-administration plasma samples, a nano-liquid chromatography - mass spectrometry/high resolution mass spectrometry (nLC-MS/HRMS) method was developed...
December 12, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29232483/epitope-resolved-detection-of-peanut-specific-ige-antibodies-by-spr-imaging
#7
Min Shen, Amit Joshi, Raghu Vannam, Chandra Dixit, Robert Hamilton, Challa V Kumar, James F Rusling, Mark Wayne Peczuh
Peanut allergy can be life-threatening and is mediated by allergen-specific immunoglobulin E (IgE) antibodies. Investigation of IgE antibody binding to allergenic epitopes identifies specific interactions underlying the allergic response. Here we report a surface plasmon resonance imaging (SPRi) immunoassay for differentiating IgE antibodies by epitope resolved detection. IgE antibodies are first captured by magnetic beads bearing IgE ε-chain specific antibodies and then introduced to an SPRi array immobilized with epitopes from the major peanut allergen glycoprotein Arachis hypogaea h2 (Ara h2)...
December 12, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29232378/genetic-variations-at-8q24-and-gastric-cancer-susceptibility-a-meta-analysis-study
#8
Pengke Zhi, Jian Shi, Feng Liu
BACKGROUND: Published data on the association between genetic variants on the 8q24 chromosome and gastric cancer (GC) susceptibility are inconclusive. Here we present a meta-analysis designed to evaluate the relationship between 8q24 variants (single nucleotide polymorphisms (SNPs) labeled rs6983267 and rs1447295) and risk of developing GC. METHODS: A literature search was performed using studies published on PubMed, Science Direct, OVID and Web of Science databases up to December 2016...
2017: PloS One
https://www.readbyqxmd.com/read/29232365/monitoring-compliance-with-standards-of-care-for-chronic-diseases-using-healthcare-administrative-databases-in-italy-strengths-and-limitations
#9
Rosa Gini, Martijn J Schuemie, Alessandro Pasqua, Emanuele Carlini, Francesco Profili, Iacopo Cricelli, Patrizio Dazzi, Valentina Barletta, Paolo Francesconi, Francesco Lapi, Andrea Donatini, Giulia Dal Co, Modesta Visca, Mariadonata Bellentani, Miriam Sturkenboom, Niek Klazinga
BACKGROUND: A recent comprehensive report on healthcare quality in Italy published by the Organization of Economic Co-operation and Development (OECD) recommended that regular monitoring of quality of primary care by means of compliance with standards of care for chronic diseases is performed. A previous ecological study demonstrated that compliance with standards of care could be reliably estimated on regional level using administrative databases. This study compares estimates based on administrative data with estimates based on GP records for the same persons, to understand whether ecological fallacy played a role in the results of the previous study...
2017: PloS One
https://www.readbyqxmd.com/read/29232342/intraoperative-near-infrared-fluorescence-imaging-of-multiple-pancreatic-neuroendocrine-tumors-a-case-report
#10
Henricus J M Handgraaf, Leonora S F Boogerd, Shirin Shahbazi Feshtali, Arantza Fariña Sarasqueta, Marieke Snel, Rutger-Jan Swijnenburg, Alexander L Vahrmeijer, Bert A Bonsing, J Sven D Mieog
Multiple endocrine neoplasia type 1 syndrome can feature pancreatic neuroendocrine lesions that have the potential to degenerate into malignancies (pancreatic neuroendocrine tumors [PNETs]). Resection is required in selected cases and aims to cure patients and to prevent metastasis. Preoperative imaging is important to assess the number, size, and location of PNETs. However, sensitivity of preoperative imaging modalities to detect small lesions can be rather disappointing. This makes intraoperative reassessment of the pancreas crucial...
January 2018: Pancreas
https://www.readbyqxmd.com/read/29232037/incorporating-prostate-health-index-density-mri-and-prior-negative-biopsy-status-to-improve-the-detection-of-clinically-significant-prostate-cancer
#11
Sasha C Druskin, Jeffrey J Tosoian, Allen Young, Sarah Collica, Arnav Srivastava, Kamyar Ghabili, Katarzyna J Macura, Ballentine H Carter, Alan W Partin, Lori J Sokoll, Ashley E Ross, Christian P Pavlovich
OBJECTIVES: To determine the performance of Prostate Health Index (PHI) density (PHID) combined with MRI and prior negative biopsy (PNB) status for the diagnosis of clinically-significant prostate cancer (PCa). PATIENTS & METHODS: Patients without a prior diagnosis of PCa, with elevated PSA and a normal digital rectal exam who had PHI testing prospectively prior to prostate biopsy were included. PHID was calculated retrospectively using prostate volume derived from transrectal ultrasound at biopsy...
December 12, 2017: BJU International
https://www.readbyqxmd.com/read/29231944/stability-of-plant-virus-based-nanocarriers-in-gastrointestinal-fluids
#12
Alberto Berardi, David J Evans, Francesca Baldelli Bombelli, George P Lomonossoff
Cowpea mosaic virus (CPMV) is a plant virus which is being extensively investigated as a drug delivery and vaccine nanocarrier for parenteral administration. However, to date little is known about the suitability of plant-based nanocarriers for oral delivery. In this study, the colloidal (i.e. aggregation), physical (i.e. denaturation) and chemical (i.e. digestion of the polypeptides) stability of CPMV and its empty virus-like particles (eVLPs) in conditions resembling the gastrointestinal fluids were evaluated...
December 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/29231761/a-rapid-method-to-identify-salmonella-enterica-serovar-gallinarum-biovar-pullorum-using-a-specific-target-gene-ipaj
#13
Lijuan Xu, Zijian Liu, Yang Li, Chao Yin, Yachen Hu, Xiaolei Xie, Qiuchun Li, Xinan Jiao
Salmonella enterica serovar Gallinarum biovar Pullorum (S. Pullorum) is the pathogen of pullorum disease, which leads to severe economic losses in many developing countries. Traditional methods to identify S. enterica have relied on biochemical reactions and serotyping, which are time-consuming with accurate identification if properly carried out. In this study, we developed a rapid polymerase chain reaction (PCR) method targeting the specific gene ipaJ to detect S. Pullorum. Among the 650 S. Pullorum strains isolated from 1962 to 2016 all over China, 644 strains were identified to harbor ipaJ gene in the plasmid pSPI12 accounting to a detection rate of 99...
December 12, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/29231758/dose-reduction-with-dedicated-ct-metal-artifact-reduction-algorithm-ct-phantom-study
#14
Naveen Subhas, Camilla P Pursyko, Joshua M Polster, Nancy A Obuchowski, Andrew N Primak, Frank F Dong, Brian R Herts
OBJECTIVE: The objective of this study was to compare reader accuracy detecting lesions near hardware in a CT phantom model at different radiation exposures using an advanced metal artifact reduction (MAR) algorithm and standard filtered back projection (FBP) techniques and to determine if radiation exposure could be decreased using MAR without compromising lesion detectability. MATERIALS AND METHODS: A CT phantom manufactured with spherical lesions of various sizes (10-20 mm) and attenuations (20-50 HU) embedded around cobalt-chromium spheres attached to titanium rods, simulating an arthroplasty, was scanned on a single CT scanner (FLASH, Siemens Healthcare) at 140 kVp and 0...
December 12, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29231711/embedding-capture-magneto-catalytic-activity-into-a-nano-catalyst-for-the-determination-of-lipid-kinase
#15
Tao Gao, Chaoli Mu, Hai Shi, Liu Shi, Xiaoxia Mao, Genxi Li
Using emerging nano-catalysts to investigate the activity of bio-catalysts (protein enzymes, catalytic RNAs, ect.) is increasingly receiving attention from material, analytical and biomedical scientists. Here, we have first fabricated a three-in-one nano-catalyst, the nitrilotriacetic acid (NTA)-modified magnetite nanoparticle (NTA-MNPs), to develop an integrated magneto-colorimetric (MagColor) assay for lipid kinase activity, so as to solve the inherent problems in lipid kinase assay. Based on three integrated functions of the NTA-MNPs (capture, magnetic separation and peroxidase activity), catalytic activity of lipid kinase is directly converted to colorimetric signals...
December 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29231704/site-specific-glycan-heterogeneity-characterization-by-hilic-solid-phase-extraction-rplc-fractionation-and-capillary-zone-electrophoresis-electrospray-ionization-tandem-mass-spectrometry
#16
Yanyan Qu, Liangliang Sun, Zhenbin Zhang, Norman J Dovichi
Reversed-phase chromatographic separation of glycopeptides tends to be dominated by the peptide composition. In contrast, capillary zone electrophoresis separation of glycopeptides is particularly sensitive to the sialic acid composition of the glycan. In this paper, we combine the two techniques to achieve superior N-glycopeptide analysis. Glycopeptides were first isolated from a tryptic digest using HILIC solid-phase extraction. The glycopeptides were separated using reversed-phase UHPLC to generate four fractions corresponding to different peptide backbones...
December 12, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29231090/esophageal-dysmotility-in-patients-following-total-laryngectomy
#17
Teng Zhang, Julia Maclean, Michal Szczesniak, Paul P Bertrand, Harry Quon, Raymond K Tsang, Peter I Wu, Peter Graham, Ian J Cook
Objectives Dysphagia is common in total laryngectomees, with some symptoms suggesting esophageal dysmotility. Tracheoesophageal (TE) phonation requires effective esophagopharyngeal air passage. Hence, esophageal dysmotility may affect deglutition or TE phonation. This study aimed to determine (1) the characteristics of esophageal dysmotility in laryngectomees, (2) whether clinical history is sensitive in detecting esophageal dysmotility, and (3) the relationship between esophageal dysmotility and TE prosthesis dysfunction...
November 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29231065/serum-interleukin-6-levels-as-an-indicator-of-aseptic-meningitis-among-children-with-enterovirus-71-induced-hand-foot-and-mouth-disease
#18
Joo Young Lee, Minji Son, Jin Han Kang, Ui Yoon Choi
OBJECTIVES: The enterovirus EV71 is a major pathogen of hand, foot, and mouth disease (HFMD) in children. Aseptic meningitis is the most common neurologic complication of EV71-induced HFMD. Lumbar puncture is a crucial procedure in the diagnosis of aseptic meningitis. It is often performed based on physicians' clinical suspicion. A diagnostic method that can aid in deciding whether this procedure should be performed is necessary. Cytokines are speculated to be associated with neurologic complications...
December 12, 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/29231019/-simultaneous-quantitative-analysis-of-koumine-gelsemine-and-gelsenicine-in-biological-samples-by-lc-ms-ms
#19
S J Ji, W Liu
OBJECTIVES: To establish a LC-MS/MS method which is accurate and sensitive for determination of koumine, gelsemine, and gelsenicine in biological samples and to verify the method. METHODS: Strychnine was used as internal standard. Analytes in blood, urine and liver with 1% sodium hydroxide solution were extracted by ethyl acetate. Chromatographic separation was achieved on a ZORBAX SB-C₁₈ column (150 mm×2.1 mm, 5 μm), and gradient elution was performed with the buffer solution of methanol-20 mmol/L ammonium acetate (including 0...
April 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29230998/-research-progress-on-the-detection-method-of-dna-methylation-and-its-application-in-forensic-science
#20
REVIEW
Y C Nie, L J Yu, H Guan, Y Zhao, H B Rong, B W Jiang, T Zhang
As an important part of epigenetic marker, DNA methylation involves in the gene regulation and attracts a wide spread attention in biological auxology, geratology and oncology fields. In forensic science, because of the relative stable, heritable, abundant, and age-related characteristics, DNA methylation is considered to be a useful complement to the classic genetic markers for age-prediction, tissue-identification, and monozygotic twins' discrimination. Various methods for DNA methylation detection have been validated based on methylation sensitive restriction endonuclease, bisulfite modification and methylation-CpG binding protein...
June 2017: Fa Yi Xue za Zhi
keyword
keyword
77181
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"