keyword
MENU ▼
Read by QxMD icon Read
search

Microscopy

keyword
https://www.readbyqxmd.com/read/29161698/a-comparison-of-three-methods-for-the-detection-of-circulating-tumor-cells-in-patients-with-early-and-metastatic-breast-cancer
#1
Eleni Politaki, Sofia Agelaki, Stella Apostolaki, Dora Hatzidaki, Areti Strati, Filippos Koinis, Maria Perraki, Georgia Saloustrou, Giannis Stoupis, Galatea Kallergi, Maria Spiliotaki, Tereza Skaltsi, Evi Lianidou, Vassilis Georgoulias, Dimitrios Mavroudis
BACKGROUND: We directly compared CTC detection rates and prognostic significance, using three different methods in patients with breast cancer (BC). METHODS: Early (n=200) and metastatic (n=164) patients were evaluated before initiating adjuvant or first-line chemotherapy, using the CellSearchTM System, an RT-qPCR for CK-19 mRNA detection and by double immunofluorescence (IF) microscopy using A45-B/B3 and CD45 antibodies. RESULTS: Using the CellSearchTM System, 37% and 16...
November 20, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29161676/hydrophilic-and-positively-charged-polyethylenimine-functionalized-mesoporous-magnetic-clusters-for-highly-efficient-removal-of-pb-ii-and-cr-vi-from-wastewater
#2
Min Young Lee, Ji Hwan Lee, Jae Woo Chung, Seung-Yeop Kwak
We develop mesoporous magnetic clusters (MMCs) functionalized with hydrophilic branched polyethylenimine (b-PEI), later called b-MG, and MMCs functionalized with positively charged b-PEI (p-MG). These materials efficiently remove Pb(II) and Cr(VI) from wastewater. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and nitrogen adsorption-desorption analysis results clearly indicate that hydrophilic b-PEI and positively charged b-PEI are successfully attached to the MMC surfaces...
November 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29161647/simple-synthesis-of-self-supported-hierarchical-aupd-alloyed-nanowire-networks-for-boosting-electrocatalytic-activity-toward-formic-acid-oxidation
#3
Tao Yuan, Hong-Yan Chen, Xiaohong Ma, Jiu-Ju Feng, Pei-Xin Yuan, Ai-Jun Wang
Herein, self-supported hierarchical AuPd alloyed interconnected nanowire networks (AuPd NCNs) were fabricated by a one-pot co-reduction method. Theophylline was acted as the capping and structure-directing agents. The product was mainly characterized by a series of techniques such as transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The hierarchical nanostructures had the enlarged electrochemically active surface area (EASA), and the enhanced catalytic activity toward formic acid oxidation reaction (FAOR) and strengthened poisoning tolerance for poisoning CO-like intermediates by cyclic voltammetry and chronoamperometry, which outperformed commercial Pd black catalyst...
November 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29161588/intestinal-flossing-keeps-pathogens-at-bay
#4
Mirela Kuka, Matteo Iannacone
Intraepithelial lymphocytes (IELs) are tissue-resident immune cells that surveil the intestine and provide the first line of defense against pathogens. Reporting in Cell, van Konijnenburg et al. (2017) combine high-resolution microscopy and intersectional genetic tools to provide a detailed characterization of IEL dynamics in response to both commensal and pathogenic microorganisms.
November 20, 2017: Developmental Cell
https://www.readbyqxmd.com/read/29161509/variation-in-the-supersaturation-and-phase-behavior-of-ezetimibe-amorphous-solid-dispersions-upon-dissolution-in-different-biorelevant-media
#5
Ahmed Elkhabaz, Sreya Sarkar, Janny K Dinh, Garth J Simpson, Lynne S Taylor
The delivery of poorly water-soluble drugs using amorphous solid dispersions (ASDs) has been widely acknowledged as a promising strategy for enhancing oral bioavailability. Upon dissolution, ASDs have accelerated dissolution rates and yield supersaturated solutions leading to higher apparent solubilities. Understanding the complex phase behavior of ASDs during dissolution is crucial for developing an effective formulation. Since the absorption of a lipophilic, high permeability drug is determined primarily by the intraluminal dissolution process and the final concentration achieved, there is a need for evaluation in biorelevant dissolution media that simulate both fasting and fed gastrointestinal states...
November 21, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29161499/polymerization-of-well-aligned-organic-nanowires-on-a-ferromagnetic-rare-earth-surface-alloy
#6
Mikel Abadía, Maxim Ilyn, Ignacio Piquero-Zulaica, Pierluigi Gargiani, Celia Rogero, Jose Enrique Ortega, Jens Brede
The high reactivity of magnetic substrate toward molecular overlayers has so far inhibited the realization of more sophisticated on-surface reactions thereby depriving these interfaces of a significant class of chemically tailored organics such as graphene nanoribbons, oligonuclear spin-chains, and metal-organic networks. Here, we present a multi-technique characterization of the polymerization of 4,4″-dibromo-p-terphenyl precursors into ordered poly (p-phenylene) arrays on top of the bi-metallic GdAu$_2$ surface alloy...
November 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/29161343/distinct-reorganization-of-collagen-architecture-in-lipopolysaccharide-mediated-premature-cervical-remodeling
#7
Shanmugasundaram Nallasamy, Meredith Akins, Breanna Tetreault, Kate Luby-Phelps, Mala Mahendroo
Previous work has identified divergent mechanisms by which cervical remodeling is achieved in preterm birth (PTB) induced by hormone withdrawal (mifepristone) or lipopolysaccharide (LPS). Our current study aims to document how collagen architecture is modified to achieve premature cervical remodeling in mice treated with LPS as a model of infection induced inflammation. Cervices were collected on gestation day (d) 15 from mice with premature cervical ripening induced by LPS and compared to d15 and d18 controls as well as a hormone withdrawal preterm birth model...
November 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29161328/use-of-quantiferon%C3%A2-tb-gold-in-tube-culture-supernatants-for-measurement-of-antibody-responses
#8
Simon G Kimuda, Irene Andia-Biraro, Moses Egesa, Bernard S Bagaya, John G Raynes, Jonathan Levin, Alison M Elliott, Stephen Cose
QuantiFERON®-TB Gold in-tube (QFT-GIT) supernatants may be important samples for use in assessment of anti-tuberculosis (TB) antibodies when only limited volumes of blood can be collected and when a combination of antibody and cytokine measurements are required. These analytes, when used together, may also have the potential to differentiate active pulmonary TB (APTB) from latent TB infection (LTBI). However, few studies have explored the use of QFT-GIT supernatants for investigations of antibody responses...
2017: PloS One
https://www.readbyqxmd.com/read/29161327/thallium-stimulates-ethanol-production-in-immortalized-hippocampal-neurons
#9
Laura Colombaioni, Massimo Onor, Edoardo Benedetti, Emilia Bramanti
Lactate and ethanol (EtOH) were determined in cell culture medium (CCM) of immortalized hippocampal neurons (HN9.10e cell line) before and after incubation with Thallium (Tl). This cell line is a reliable, in vitro model of one of the most vulnerable regions of central nervous system. Cells were incubated for 48 h with three different single Tl doses: 1, 10, 100 μg/L (corresponding to 4.9, 49 and 490 nM, respectively). After 48 h, neurons were "reperfused" with fresh CCM every 24/48 h until 7 days after the treatment and the removed CCM was collected and analysed...
2017: PloS One
https://www.readbyqxmd.com/read/29161206/a-hypersensitivity-like-response-to-meloidogyne-graminicola-in-rice-oryza-sativa-l
#10
Ngan Thi Phan, Dirk De Waele, Mathias Lorieux, Lizhong Xiong, Stephane Bellafiore
Meloidogyne graminicola (M. graminicola) is a major plant-parasitic nematode affecting rice cultivation in Asia. Resistance to this nematode was found in the African rice genotypes Oryza glaberrima and O. longistaminata, however, due to interspecific hybrid sterility, the introgression of resistance genes in the widely consumed O. sativa varieties remains challenging. Recently, resistance was found in O. sativa and here we report for the first time the histological and genetic characterization of the resistance to M...
November 21, 2017: Phytopathology
https://www.readbyqxmd.com/read/29161014/toward-an-axial-nanoscale-ruler-for-fluorescence-microscopy
#11
Sabrina Simoncelli, Maria Makarova, William Wardley, Dylan M Owen
In the discussion of resolution in optical microscopy, axial precision has often come second to its lateral counterpart. However, biological systems make no special arrangements for our preferred direction of imaging. The ability to measure axial distances, that is, the heights of fluorophores relative to a plane of reference, is thus of paramount importance and has been the subject of several recent advances. A novel method is to modify the fluorescence emission based on the height of the individual fluorophore, such that its z-position is encoded somehow in the detected signal...
November 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/29161013/intelligent-peptide-gathering-mechanical-arm-tames-wild-trojan-horse-peptides-for-the-controlled-delivery-of-cancer-nanotherapeutics
#12
Nian-Qiu Shi, Yan Li, Yong Zhang, Nan Shen, Ling Qi, Shu-Ran Wang, Xian-Rong Qi
Cell-penetrating peptides (CPPs), also called "Trojan-Horse" peptides, have been used for facilitating intracellular delivery of numerous diverse cargoes and even nanocarriers. However, the lack of targeting specificity ("wildness" or nonselectivity) of CPP-nanocarriers remains an intractable challenge for many in vivo applications. In this work, we used an intelligent "peptide-gathering mechanical arm" (Int PMA) to curb CPPs' wildness and enhance the selectivity of R9-liposome-based cargo delivery for tumor targeting...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29160933/xyloglucan-in-the-primary-cell-wall-assessment-by-fesem-selective-enzyme-digestions-and-nanogold-affinity-tags
#13
Yunzhen Zheng, Xuan Wang, Yuning Chen, Edward Wagner, Daniel J Cosgrove
Xyloglucan has been hypothesized to bind extensively to cellulose microfibril surfaces and to tether microfibrils into a load-bearing network, thereby playing a central role in wall mechanics and growth, but this view is challenged by newer results. Here we combined high-resolution imaging by Field-Emission Scanning Electron Microscopy (FESEM) with nanogold affinity tags and selective endoglucanase treatments to assess the spatial location and conformation of xyloglucan in onion cell walls. FESEM imaging of xyloglucanase-digested cell walls revealed an altered microfibril organization but did not yield clear evidence of xyloglucan conformations...
November 21, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29160903/smoking-cessation-leads-to-changes-in-survivin-expression-in-oral-mucosa
#14
Celina Faig Lima, Erica Crastechini, Nathalia Curto Dos Santos, Ana Carolina Prado Ribeiro, Thais Bianca Brandão, Félix Cristiano Ferreira de Castro, Jaqueline Scholz Issa, Janete Dias Almeida
BACKGROUND: Survivin is an inhibitor protein of apoptosis and play a role in oral carcinogenesis mechanism. METHODS: This aim of this study was to evaluate the effect of smoking in survivin expression of oral mucosa of chronic smokers with and without oral squamous cell carcinoma (OSCC). The study was composed of three groups: Group 1 - 26 patients smoking more than 20 cigarettes/day/10 years without either history of oral malignant neoplasia or visible clinical signs in the examined site; Group 2 - 26 patients with OSCC; Group 3 - 22 patients surgically treated for OSCC for at least 1 month...
November 21, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/29160880/low-temperature-growth-of-gallium-oxide-thin-films-via-plasma-enhanced-atomic-layer-deposition
#15
Richard O'Donoghue, Julian Rechmann, Morteza Aghaee, Detlef Rogalla, Hans-Werner Becker, Mariadriana Creatore, Andreas Dirk Wieck, Anjana Devi
Herein we describe an efficient low temperature (60-160 °C) plasma enhanced atomic layer deposition (PEALD) process for gallium oxide (Ga2O3) thin films using hexakis(dimethylamido)digallium [Ga(NMe2)3]2 with oxygen (O2) plasma on Si(100). The use of O2 plasma was found to have a significant improvement on the growth rate and deposition temperature when compared to former Ga2O3 processes. The process yielded the second highest growth rates (1.5 Å per cycle) in terms of Ga2O3 ALD and the lowest temperature to date for the ALD growth of Ga2O3 and typical ALD characteristics were determined...
November 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29160862/time-resolved-photoluminescence-microscopy-for-the-analysis-of-semiconductor-based-paint-layers
#16
Daniela Comelli, Alessia Artesani, Austin Nevin, Sara Mosca, Victor Gonzalez, Myriam Eveno, Gianluca Valentini
In conservation, science semiconductors occur as the constituent matter of the so-called semiconductor pigments, produced following the Industrial Revolution and extensively used by modern painters. With recent research highlighting the occurrence of various degradation phenomena in semiconductor paints, it is clear that their detection by conventional optical fluorescence imaging and microscopy is limited by the complexity of historical painting materials. Here, we illustrate and prove the capabilities of time-resolved photoluminescence (TRPL) microscopy, equipped with both spectral and lifetime sensitivity at timescales ranging from nanoseconds to hundreds of microseconds, for the analysis of cross-sections of paint layers made of luminescent semiconductor pigments...
November 21, 2017: Materials
https://www.readbyqxmd.com/read/29160836/an-in-vitro-study-of-the-photodynamic-effectiveness-of-go-ag-nanocomposites-against-human-breast-cancer-cells
#17
Fozia Shaheen, Muhammad Hammad Aziz, Muhammad Fakhar-E-Alam, Muhammad Atif, Mahvish Fatima, Riaz Ahmad, Atif Hanif, Saqib Anwar, Fatima Zafar, Ghazanfar Abbas, Syed Mansoor Ali, Mukhtar Ahmed
Graphene-based materials have garnered significant attention because of their versatile bioapplications and extraordinary properties. Graphene oxide (GO) is an extremely oxidized form of graphene accompanied by the functional groups of oxygen on its surface. GO is an outstanding platform on which to pacify silver nanoparticles (Ag NPs), which gives rise to the graphene oxide-silver nanoparticle (GO-Ag) nanocomposite. In this experimental study, the toxicity of graphene oxide-silver (GO-Ag) nanocomposites was assessed in an in vitro human breast cancer model to optimize the parameters of photodynamic therapy...
November 21, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29160812/micro-droplet-detection-method-for-measuring-the-concentration-of-alkaline-phosphatase-labeled-nanoparticles-in-fluorescence-microscopy
#18
Rufeng Li, Yibei Wang, Hong Xu, Baowei Fei, Binjie Qin
This paper developed and evaluated a quantitative image analysis method to measure the concentration of the nanoparticles on which alkaline phosphatase (AP) was immobilized. These AP-labeled nanoparticles are widely used as signal markers for tagging biomolecules at nanometer and sub-nanometer scales. The AP-labeled nanoparticle concentration measurement can then be directly used to quantitatively analyze the biomolecular concentration. Micro-droplets are mono-dispersed micro-reactors that can be used to encapsulate and detect AP-labeled nanoparticles...
November 21, 2017: Sensors
https://www.readbyqxmd.com/read/29160804/residual-endodontic-filling-material-after-post-space-preparation-a-confocal-microscopic-study
#19
Yu-Yao Teoh, Laurence J Walsh
This laboratory study assessed removability of endodontic alkaline cements and resin sealers using coronal cross-sectional slices of roots with single canals. Materials were labelled with 0.1% (w/w) sodium fluorescein prior to mixing so that confocal microscopy could be used to quantify material remaining on the walls of post spaces, to assess cleanliness. Roots of extracted teeth were prepared using rotary NiTi instruments then obturated using lateral condensation with gutta percha and epoxy resin sealers (AH-Plus™ or Zirmix™), or were filled by injecting mineral trioxide aggregate (MTA) cement (GC Nex™ MTA or MTAmix™) or a hard-setting calcium hydroxide cement (Supercal™)...
November 21, 2017: Materials
https://www.readbyqxmd.com/read/29160774/etchant-free-transfer-of-2d-nanostructures
#20
Fu Zhang, Chad Erb, Lauren Runkle, Xiaotian Zhang, Nasim Alem
The effective use of the van der Waals 2D materials relies on their successful transfer from the growth substrate onto other target substrates in the form of large films or flakes. In particular, it is important to transfer such atomically thin samples to various substrates with minimal sample damage and exposure to etchants and chemicals to realize their applications. Here we develop a universal transfer method that not only is free of reactive etchants, but also can maintain the film morphology intact with no tears and cracks...
November 21, 2017: Nanotechnology
keyword
keyword
10932
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"